CN103572441A - Sensor, wireless sensing node and method for spinning running state monitoring - Google Patents

Abstract

The invention discloses a sensor, a wireless sensing node and a method for spinning running state monitoring. The method mainly comprises the steps that a designed grid electrode sensor which is based on electrostatic induction and has a special structure acquires a spinning running state signal; a pulse sequence signal with principal frequency fH and uniform and consistent period is obtained by signal processing; the acquired signal is detected and computed by an embedded microprocessor; data such as yarn end breaking, yarn speed and twist during spinning running on a spindle is obtained; and perceptive data information is sent to a wireless sensing network by an integrated wireless radio frequency (RF) transceiver in the microprocessor. According to the sensor, the wireless sensing node and the method for the spinning running state monitoring, the manpower cost can be lowered; a spindle spinning running signal can be monitored actively in real time; and a periodic error range is plus-minus 0.5 microseconds, so that the speed and the accuracy of on-line monitoring are increased and improved.

Description

Sensor, wireless sensing node and method thereof for the monitoring running state that spins

Technical field

The invention belongs to wireless sensor technology field, be specifically related to a kind of sensor for the monitoring running state that spins, and utilize the designed wireless sensing node of this sensor, the invention still further relates to the spin method of monitoring running state of above-mentioned wireless sensing node that adopts.

Background technology

In textile production process, quality and the cost of monitoring product are one of very important contents in enterprise's fine-grained management in real time, and wherein, the Real-Time Monitoring of spinning running status is one of link the most key in quality of textile products cost control and management.At present, China's cotton mill is mostly according to the spindle of spinning machine rotating speed of the twist thread twist and the setting of spinning, and the yarn linear speed on estimation spindle, monitors by artificial inspection back and forth the breakage that each spindle occurs.But these means lack initiative, real-time and accuracy, be difficult to adapt to the demand of Modern Manufacturing Enterprise product quality cost management.China is that textiles is manufactured big country, and reducing costs expense, improving the quality of products is matters vital to national well-being and the people's livelihood.

The appearance of technology of Internet of things, supervises important platform is provided for becoming more meticulous of enterprise production process data.It can extend to the object of production management less " unit ", from perception, be transferred to Intelligent treatment, for enterprise production process management provide more comprehensively, initiatively, real-time fine data information, also for the complete monitoring of product quality with review the data foundation that provides important, actively pushed forward the lifting of business administration ability.Yet the feature of Internet of Things is to be perceived as object, cognition technology is one of core technology of Internet of Things, and different monitored object, needs different sensing technology and monitoring method.Therefore, research and develop a kind of sensor for the monitoring running state that spins, wireless sensing node and method thereof imperative.

Summary of the invention

The object of this invention is to provide a kind of sensor for the monitoring running state that spins, realize the on-line automatic collection of the spinning operating state signal on spindle, solve the high problem of cost that existing dependence manually monitors that means are brought;

Another object of the present invention is to provide a kind of designed wireless sensing node of the sensor that utilizes the spinning running status on spindle is carried out to on-line automatic collection, detection and computing, and be passed in wireless network by Radio Transmission Technology, delivering to host computer adds up, give that Spinning process department provides in real time, the running state information of spindle spinning accurately, time lag, the inaccurate problem to solve existing monitoring means, brought;

The 3rd object of the present invention is to provide a kind of spin method of monitoring running state of above-mentioned wireless sensing node that adopts, by method of the present invention, initiatively, in real time, accurately calculate Yarn break, yarn linear speed, the data such as the twist of twisting thread of on spindle, spinning, solve coarse problem that existing monitoring method is brought.

The technical solution adopted in the present invention is: for the sensor of the monitoring running state that spins, by the double-sided printed-circuit board with the gate-shaped electrode of special construction, made, front at printed circuit board (PCB), several very thin electrodes are equidistant and interconnect and form an electrode grid, be called shield grid, its profile forms a rectangle; At printed circuit reverse side, than the electrode of few one of front shield grid quantity, also interconnect, each electrode is just in time positioned at two electrode gaps of shield grid, and its profile also forms a rectangle.

Another technical scheme of the present invention is: for the wireless sensing node of the monitoring running state that spins, comprise the sensor, signal processing module, embedded microprocessor and the power supply that connect successively, the output of embedded microprocessor is connected with wireless sense network by Radio Transmission Technology; Embedded microprocessor selects Nei Ji to have the CC2530 chip of wireless radio frequency transceiver; Described power supply passes through powered battery.

The 3rd technical scheme of the present invention is: spinning method for monitoring operation states, specifically according to following steps, implement:

Step 1: when yarn moves with a certain speed, the random electrostatic charge of utilizing yarn to carry, through electrostatic induction and the space filtering of sensor, obtains the clutter of a pulse wave that contains frequency component and low-frequency disturbance, specifically implements according to following steps:

Supposing only has a point charge at yarn, and the signals collecting principle of sensor is as follows:

(1) yarn with a certain speed with respect to sensor movement;

(2) when this point charge is through a certain electrode on signal grid, be just positioned at two electrode gap places of shield grid, so, at this electrode place, produce voltage signal, but it,, at other contiguous electrode places, is positioned on the electrode of shield grid, with regard to non-inductive or very little interference inductive voltage signal;

If the electrode on signal grid does not link together, so, when yarn passes through sensor movement with a certain speed, this point charge produces a voltage signal U on each electrode of signal grid _s, and the voltage signal U producing on two adjacent electrodes (t) _sand U (t) _s(t+1) time difference of a Δ t will be had;

If all electrodes on signal grid are linked together, so, when spinning operation broken end does not occur, the output at sensor is obtained to one and there is the pulse wave electric voltage signal U that the cycle is Δ t _s(t), otherwise, the output at sensor is obtained be one without the level signal of pulse wave

mean that broken end appears in the spinning yarn on this spindle;

Step 2: signal processing module is processed transducing signal, comprise and utilize preamplifier to amplify the clutter of sensor collection, the low-frequency interference signal of eliminating in preamplifier output signal is processed in filtering through high-pass filter, by peak amplifier by the amplitude modulation of the output signal of high-pass filter to limit ± 0.7V amplitude between, utilize comparator that the output signal of peak amplifier is shaped to pulse sequence signal, finally, by the frequency modulation of phaselocked loop, phase modulation effect, stable pulse sequence frequency and phase place of pinning comparator output, formation has basic frequency f _h, cycle uniformity pulse sequence signal,

Step 3: utilize embedded microprocessor to detect the spinning operating state signal gathering, comprise and utilize the P1.2 pin of P1 port in CC2530 and timer to detect the rising edge of comparator output signal in signal processing module, if in timing, the rising edge of pulse signal do not detected, show to occur breakage, otherwise, normal; Utilize the P0.0 pin of P0 port in CC2530 and timer to carrying out step-by-step counting between the adjacent rising edge of phaselocked loop output pulse sequence signal in signal processing module, detect spinning run signal frequency, therefrom obtain breakage signal and spinning run signal cycle;

Step 4: utilize embedded microprocessor to carry out computing to the signal of the spinning running status detecting, the data of obtaining the breakage that spins on spindle, yarn linear speed, the twist of twisting thread, are sent to the data of perception in wireless sense network by less radio-frequency RF transceiver integrated in embedded microprocessor;

Suppose, interelectrode spacing is Δ x, so, and by the frequency of detecting sensor output signal, i.e. cycle Δ t, calculates the linear speed v of yarn:

v＝Δx/Δt，

According to the raw material of yarn, composition and specification, the spindle rotation speed n of spinning machine is to set in advance before operation, so the yarn twist twise calculating formula of twisting thread is:

twise＝n/v。

The invention has the beneficial effects as follows:

1. the sensor for the monitoring running state that spins of the present invention, wireless sensing node and method thereof, not only can reduce human cost, and the circular error scope of the spindle of monitoring spinning run signal is in ± 0.5 microsecond, can improve the accuracy of on-line monitoring;

2. wireless sensing node of the present invention, can not only gather initiatively, in real time and the signal of Test Field spinning running status, the data-signal detecting is processed in intelligence computation, and can communicate with other wireless sensing nodes, forms an organic radio sensing network;

3. wireless sensing node of the present invention, have simple in structure, with low cost, volume is little, lightweight, low in energy consumption, the feature that is easy to implement and is convenient to commercialization batch production.

Accompanying drawing explanation

Fig. 1 is the structural representation of a kind of embodiment of wireless sensing node of the present invention;

Fig. 2 is the data frame format of IEEE802.15.4 wireless transmission protocol;

Fig. 3 is the process chart of monitoring method of the present invention;

Fig. 4 is the structural representation of sensor of the present invention;

Fig. 5 is that yarn passes through sensor schematic diagram;

Fig. 6 is the basic acquisition principle figure of sensor;

Fig. 7 is the structural representation that signal is processed;

Fig. 8 is preamplifier interface schematic diagram;

Fig. 9 is high-pass filter interface schematic diagram;

Figure 10 is peak amplifier interface schematic diagram;

Figure 11 is comparator interface schematic diagram;

Figure 12 is phaselocked loop interface schematic diagram;

Figure 13 is the signal graph of circuit outputs at different levels after signal is processed;

Figure 14 is embedded microprocessor CC2530 chip interface schematic diagram.

In figure, 1. wireless sensing node, 2. sensor, 3. signal processing module, 4. embedded microprocessor, 5. power supply, 6. wireless sense network, 7. preamplifier, 8. high-pass filter, 9. peak amplifier, 10. comparator, 11. phaselocked loops.

The specific embodiment

Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.

In process of textile production, textile fabric usually produces friction mutually or with machine part, always causes on the yarn of spinning some electrostatic charges of accumulating more or less.If the induction electrode of the other placement of yarn a motion so, just there will be micro voltage fluctuation on this electrode.Therefore, in order to monitor the running status of yarn, this induction effect by means of electrostatic charge on yarn, designed a kind of gate-shaped electrode sensor with special construction, it can improve the induction susceptibility to electrostatic charge on yarn, can carry out space filtering to the voltage signal being obtained by electrostatic induction on yarn simultaneously.

The structure of the sensor 2 of electrostatic induction of the present invention, as shown in Figure 4, it consists of very simple, the cheap double-sided printed-circuit board of a slice.In the front of printed circuit board (PCB), several very thin electrodes are equidistant and interconnect and form an electrode grid, are called shield grid, and its profile forms a rectangle; At printed circuit reverse side, than the electrode of few one of front shield grid quantity, also interconnect, each electrode is just in time positioned at two electrode gaps of shield grid, and its profile also forms a rectangle.Positive shield grid is connected with the ground of preamplifier, and the signal grid of reverse side is connected with the input of preamplifier.The basic unit of printed circuit board (PCB) is as the insulating barrier of shield grid and signal grid.

The shield grid of sensor 2 plays shielding action to electrostatic induction, two electrode gap places that it makes to only have electric charge on yarn to be just in time positioned at shield grid could produce the voltage signal of induction on the electrode of signal grid, and the electric charge that is positioned at other positions is because being subject to the shielding action of shield grid, non-inductive or very little interference inductive voltage signal on the electrode of signal grid.Meanwhile, the space layout of sensor 2 electrode grids, can make sensor 2 as a sieve, the voltage signal inducing on signal grid be filtered, and generates the pulse wave electric voltage signal with certain frequency.

Fig. 5 be yarn by the schematic diagram that simulates of sensor 2, at the two ends of sensor 2, two little skies of yarn to be set, to control the distance of 2 of yarn and sensors.When yarn with certain speed apart from the about 1mm of shield grid and perpendicular to electrode movement, the random electric charge carrying on yarn will, through the gap between every two electrodes of shield grid, induce voltage signal on each electrode of signal grid.Because signal grid is comprised of many electrodes, the random electric charge on yarn produces a pulse wave electric voltage signal U at preamplifier 7 outputs of sensor 2 _s(t), be called transducing signal.

The length of electrode grid should be at 50mm between 100mm, and the quantity of electrode is no less than 20; The width of front shield grid electrode, is grown at 5mm between 10mm between 0.6mm at 0.3mm; The width of reverse side signal grid electrode is between 0.4 to 0.7mm, long between 5 to 9mm.The area of plane of electrode is larger, and the basic unit of printed circuit board (PCB) is thinner, and the electrostatic charge induction of sensor is just more responsive; The number of electrodes of electrode grid is more, and the space filtering performance of sensor is just better.

The structure of a kind of embodiment of wireless sensing node 1 of the present invention as shown in Figure 1, comprise the sensor 2, signal processing module 3, embedded microprocessor 4 and the power supply 5 that connect successively, the output of embedded microprocessor 4 is connected with wireless sense network 6 by Radio Transmission Technology.Embedded microprocessor 4 is selected is integrated with the CC2530 chip of less radio-frequency RF transceiver in being, what Radio Transmission Technology adopted is the wireless transmission protocol of compatible IEEE802.15.4.

CC2530 is that American TI Company is for integrated chip on the sheet of the second generation support ZigBee/IEEE802.15.4 agreement of 2.4GHz ISM frequency band release.The inner integrated high performance less radio-frequency RF transceiver of CC2530, industrial standard enhancement mode 8051MUC kernel, the RAM of 8KB, 32/64/128/256KB flash memory, the park mode timer of 32kHz crystal oscillator, electrify restoration circuit, down Monitor Unit circuit, command strobes coprocessor CSP, 2 USART, 8 and 16 bit timing devices, WatchDog Timer, configurable 12 ADC are inputted on 8 tunnels, 21 programmable universal I/O ports, AES security coprocessor, support CSMA-CA, signal strength signal intensity indication/the link-quality that digitized RSSI/LQI(receives is indicated) and powerful DMA function.Under reception and emission mode, current loss is respectively 24mA and 29mA, and operating voltage range is 2.0V～3.6V, operation clock 32MHz.Due to the strong disposal ability of CC2530 and abundant interface resource, and the significant advantage that hardware design is simple, integrated level is high, low in energy consumption, volume is little, cost is low.

The wireless transmission protocol of IEEE802.15.4 is to avoid data collision based on CSMA/CA mechanism.According to whether adopting beacon, network to be divided into two kinds of non-beacon network and beacon networks.Under non-beacon patterns, node is used CSMA/CA mechanism competitive channel, i.e. node random back a period of time, carry out clear channel assessment (CCA) CCA, if channel idle, sends data, if channel busy is waited for after one section of random time again, carry out again CCA, until channel idle sends data.Under beacon patterns, superframe has been divided to 16 time slots, and the back off time of carrying out CCA is to take time slot as unit, and node is waited for 1 or several time slots, carry out CCA, if channel idle, sends data, otherwise, again wait for again several time slots, carry out again CCA, until channel idle sends data.Command strobes coprocessor CSP integrated on CC2530 sheet provides the interface between MCU and radio, there are gating order immediately and program to carry out two kinds of patterns, can process the order that MCU sends, simultaneously by the program storage of embedded 24 bytes, coordinate MAC timer to automatically perform CSMA/CA algorithm, serve as the coprocessor of MCU.

CC2530 realizes data transmit-receive by register transmission buffer TXFIFO and RXFIFO.When sending data, toward data writing in TXFIFO, radio module adds physical layer synchronization header and frame check sequence FCS automatically, by gating order STXONCCA transmission data; When receiving data and complete, produce RXPKTDONE and interrupt, in interrupt service routine from RXFIFO buffer reading out data.As shown in Figure 2, wherein, frame control domain accounts for 2 bytes to the each data frame format that sends or receive of CC2530, is used to indicate frame type, enables safety, confirms the information such as request, source destination address pattern; Data sequence number accounts for 1 byte, for mating of acknowledgement frame and Frame or command frame; Address information accounts for (0～20) individual byte, for identifying the address of transmitting apparatus and target device; Frame load is data or order to be sent or that receive; Whether frame check accounts for 2 bytes, for checking the Frame of transmitting-receiving correct.Owing to having defined the maximum length of physics service data unit in IEEE802.15.4 standard, be 127 bytes, and 8 bytes wherein have been used, so the byte length of valid frame load is 1～119 byte.

The structure of signal processing module 3 wherein as shown in Figure 7, comprises the preamplifier 7, high-pass filter 8, peak amplifier 9, comparator 10 and the phaselocked loop 11 that connect successively.Wherein:

1. preamplifier 7: two operational amplifier LMC6482, consist of, one-level is as follower, and another grade is that multiplication factor is 80 amplifier, and its interface is illustrated as shown in Figure 8, for the transducing signal gathering is amplified;

2. high-pass filter 8: three rank high pass RC networks and an operational amplifier LMC6482, consist of, its interface signal as shown in Figure 9, is carried out high-pass filtering processing to the transducing signal amplifying, and eliminates low-frequency interference signal, particularly 50Hz electrical network interfering signal;

3. peak amplifier 9: by an operational amplifier LMC6482 and two 1N4453 stabilized switch diodes, formed, the signal of its interface as shown in figure 10, the transducing signal after high-pass filtering is amplified and amplitude limit to ± 0.7V amplitude range;

4. comparator 10: two operational amplifier LM339 and two rest-set flip-flops 7400, consist of, its interface signal as shown in figure 11, the output signal of peak amplifier is shaped to the pulse sequence signal of amplitude between 0～5V, and is passed in CC2530, for detection of breakage information;

5. phaselocked loop 11: a phaselocked loop HEF4046, consist of, its interface signal as shown in figure 12, by frequency locking, phase-locked effect, make frequency, the cycle uniformity of the pulse sequence signal of comparator output, and be passed to the computing of carrying out yarn linear speed, the twist of twisting thread in CC2530;

Sensor for the monitoring running state that spins of the present invention, wireless sensing node and method thereof, mainly utilize design a kind of based on gate-shaped electrode sensor electrostatic induction, that there is special construction, gather spinning operating state signal, utilize the signal processing module in wireless sensing node to process and obtain having basic frequency f the signal gathering _h, cycle uniformity pulse sequence signal, embedded microprocessor in recycling wireless sensing node detects and computing the signal after processing, running status obtains spinning on spindle, comprise Yarn break, yarn linear speed, the data such as the twist of twisting thread, then by less radio-frequency RF transceiver integrated in embedded microprocessor, the data message of perception is sent in wireless sense network.Its handling process as shown in Figure 3.

In order to save energy, wireless sensing node 1 of the present invention started operation 1 time every 15 seconds, gathered, detects and calculate signal and the data of spinning running status, and other times are in sleep.

Specifically according to following steps, implement:

Step 1: when yarn moves with a certain speed, the random electrostatic charge of utilizing yarn to carry, through electrostatic induction and the space filtering of sensor 2, obtains the clutters such as a pulse wave that contains frequency component and low-frequency disturbance, specifically implements according to following steps:

Supposing only has a point charge at yarn, and the signals collecting principle of sensor 2 is as follows:

(1) yarn with a certain speed with respect to sensor movement;

(2) when this point charge is through a certain electrode on signal grid, be just positioned at two electrode gap places of shield grid, so, at this electrode place, produce voltage signal, but it,, at other contiguous electrode places, is positioned on the electrode of shield grid, with regard to non-inductive or very little interference inductive voltage signal.

As shown in Figure 6 a, if the electrode on signal grid does not link together, so, when yarn moves through sensor 2 with a certain speed, this point charge produces a voltage signal U on each electrode of signal grid _s, and the voltage signal U producing on two adjacent electrodes (t) _sand U (t) _s(t+1) time difference of a Δ t will be had.

As shown in Figure 6 b, if all electrodes on signal grid are linked together, so, when spinning operation broken end does not occur, the output at sensor 2 is obtained to one and there is the pulse wave electric voltage signal U that the cycle is Δ t _s(t), otherwise, the output at sensor 2 is obtained be one without the level signal of pulse wave mean that broken end appears in the spinning yarn on this spindle.

Step 2: 3 pairs of transducing signals of signal processing module are processed, comprise that the clutter that utilizes 7 pairs of sensors of preamplifier 2 to gather amplifies, the low-frequency interference signal of eliminating in preamplifier output signal is processed in filtering through high-pass filter 8, by peak amplifier 9 by the amplitude modulation of the output signal of high-pass filter 8 to limit ± 0.7V amplitude between, utilize comparator 10 that the output signal of peak amplifier 9 is shaped to pulse sequence signal, finally, by the frequency modulation of phaselocked loop 11, phase modulation effect, stable pulse sequence frequency and phase place of pinning comparator 10 outputs, formation has basic frequency f _h, cycle uniformity pulse sequence signal,

In fact the electric charge on yarn is random distribution, rather than only on one point.So the signal of telecommunication obtaining at sensor 2 outputs is a pulse wave that contains many frequency components and noise clutter., must process through signal shaping for this reason, could obtain and there is basic frequency f _hpulse sequence signal.

Figure 13 is to the transducing signal output waveform signals figure after the processing of circuit such as preamplifier 7, high-pass filter 8, peak amplifier 9, comparator 10, phaselocked loop 11 respectively.

Step 3: utilize the spinning operating state signal of 4 pairs of collections of embedded microprocessor to detect, comprise and utilize the rising edge of comparator 10 output signals in the P1.2 pin of P1 port in CC2530 and 3 pairs of signal processing modules 3 of timer to detect, if in timing, the rising edge of pulse signal do not detected, show to occur breakage, otherwise, normal; Utilize between the adjacent rising edge of phaselocked loop 11 output pulse sequence signals in the P0.0 pin of P0 port in CC2530 and 1 pair of signal processing module 3 of timer and carry out step-by-step counting, detect spinning run signal frequency, therefrom obtain breakage signal and spinning run signal cycle;

Because sensor 2 positive and negative electrodes extremely wide being respectively: 0.3mm between 0.6mm and between 0.4 to 0.7mm, so between adjacent electrode, spacing range is: 0.08cm～0.14cm.When spinning linear speed is between 30 cel～5 cels (18 ms/min～0.3 m/min), the frequency range of the pulse sequence signal of signal processor output is: between 375Hz～35.7Hz, the cycle is between 0.0027s～0.028s.Therefore, the present invention utilizes the P1.2 pin of P1 port in CC2530 and timer 3 to detect breakage signal; The P0.0 pin of P0 port and timer 1 detect the cycle of spinning run signal, and its interface signal as shown in figure 14.Wherein, breakage signal, under the effect of 125KHz system clock, by the P1.2 pin of P1 port and the Interruption of timer 3, the rising edge of comparator output signal in detection signal processing module 3, if in timing, the rising edge of signal do not detected, show to occur breakage, otherwise, normal; The cycle of spinning run signal is by the rising edge of phaselocked loop 11 output pulse sequence signals in the P0.0 pin detection signal processing module 3 of P0 port, by 2MHz clock signal of system control timer 1, to carrying out step-by-step counting between the adjacent rising edge of phaselocked loop 11 output pulse sequence signals, detect spinning run signal frequency, therefrom obtain breakage signal and spinning run signal cycle.Concrete steps are implemented as follows:

1. initialize routine

(1) system clock initializes

A, selective system clock source are 32MHz crystal oscillator: CLKCONCMD.OSC &=～0x40;

B, timer mark output frequency is set is 16MHz:CLKCONCMD.TICKSPD ∣=0x08;

(2) system variable initializes

A, initialization interrupt response sign: Cycle_Int_Response_Flag=0;

B, initialization broken yarn sign: Broken_Yarn__Flag=0;

C, initialization spinning run signal cycle Δ t:Operat_Cycle_Time=0; (3) T1 timer initializes

A, selection T1 timer frequency divider divide value are 8:T1CTL.DIV ∣=0x04;

B, selection T1 timer operation pattern are operation suspension: T1CTL.MODE &=～0x03;

C, clear T1 timer counter overflow interrupt identification: T1STAT.OVFIF &=～0x20;

D, clear T1 timer counter: T1CNTH=0x00;

T1CNTL＝0x00；

(4) T3 timer initializes

A, selection T3 timer frequency divider divide value are 128:T3CTL.DIV ∣=0x E0;

B, selection T3 timer operation pattern are operation suspension: T3CTL.MODE &=～0x10;

C, clear T3 timer counter: T3CNT=0x00;

D, clear T3 timer counter overflow interrupt identification: TIMIF.T3OVFIF &=～0x01;

E, T3 timer overflow interruption masking and enable: T3CTL.OVFIM ∣=0x08;

F, T3 timer interrupt enabling: IEN1.T3IE ∣=0x08;

(5) P0 port I/O configuration initializes

A, selection P0 port are general purpose I/O:P0SEL &=0x00;

B, arrange P0 port direction for input: P0DIR &=0x00;

C, arrange on P0 port input pattern and draw: P0INP &=0x00;

(6) P1 port I/O configuration initializes

A, selection P1 port are general purpose I/O:P1SEL &=0x00;

B, arrange P1 port direction for input: P1DIR &=0x00;

C, arrange on P1 port input pattern and draw: P1INP &=0x00;

D, clear P0 port position 0 interrupt status sign: P0IFG &=～0x01;

E, the rising edge of selecting P0 port P0.0 pin to input cause interruption:

PICTL.P0ICON&＝～0x01

F, 0 interruption masking of P0 port position is set enables: P0IEN ︱=0x01;

G, P0 port is set interrupts enabling: IEN1.P0IE ︱=0x20;

H, each interrupt source is set enables: IEN0.EA ︱=0x80;

(7) P1 port I/O interrupts initializing

A, clear P1 port position 2 interrupt status mark P 1IFG &=～0x04;

B, the rising edge of selecting P1 port P1.2 pin to input cause interruption:

PICTL.P1ICON L&＝～0x02

C, 2 interruptions masking of P1 port position are set forbid: P1IEN &=～0x04;

D, P1 port interrupt inhibit is set: IEN2.P1IE &=～0x10;

2. interrupt service routine

(1) interrupt service routine 1: detect breakage signal

A, judge whether P1 port position 2 interrupt status signs are 1, if so, turn to c to start to carry out, otherwise continue to carry out;

B, show to occur breakage, broken yarn sign: Broken_Yarn__Flag=1 is set;

C, clear P1 port position 2 interrupt status signs: P1IFG &=～0x04;

D, clear T3 timer counter overflow interrupt identification: TIMIF.T3OVFIF &=～0x01;

E, clear T3 timer counter: T3CNT=0x00;

F, return to interruption;

Annotation: because broken end is random, the rising edge that for this reason needs Interruption to read the input of P0 port P0.1 pin causes interrupt status sign.Wherein, timing is the timing under the slowest yarn linear speed, selects timer 3 countings to overflow and enters interruption; Interrupt service routine is the interrupt status flag bit that the input of judgement port P0.1 pin causes, if 1, zero clearing is returned, otherwise it is 1 that broken yarn sign Broken_Yarn__Flag is set, and returns.

(2) interrupt service routine 2: the cycle Δ t that detects spinning run signal

A, judge whether interrupt response sign Int_Response_Flag is 0, if not, turn to e to start to carry out, otherwise continue to carry out;

B, startup T1 timer operation pattern are that free-running operation starts counting:

T1CTL.MODE︱＝0x01；

C, interrupt response sign add 1:Int_Response_Flag=Int_Response_Flag+1;

D, turn to j continue to carry out;

E, selection T1 timer operation pattern are operation suspension: T1CTL.MODE &=～0x03;

F, record T1 timer counter value: Cycle_Counter=T1CNTH * 2 ⁸+ T1CNTL

G, judge whether T1 timer counter overflows interrupt identification is 1, if not turn to i to start to carry out;

H, clear T1 timer counter overflow interrupt identification: T1STAT.OVFIF &=～0x20;

I, record T1 timer counter overflow value: Cycle_Counter=Cycle_Counter+2 ¹⁶

J, clear P0 port position 0 interrupt status sign: P0IFG &=～0x01;

K, return to interruption

Step 4: utilize embedded microprocessor (4) to carry out computing to the signal of the spinning running status detecting, obtain the data of the breakage that spins on spindle, yarn linear speed, the twist of twisting thread, by integrated less radio-frequency RF transceiver in embedded microprocessor (4), the data of perception are sent in wireless sense network (6);

Suppose, interelectrode spacing is Δ x, so, and by the frequency of detecting sensor 2 output signals, i.e. cycle Δ t, can monitor the linear speed v of yarn:

v＝Δx/Δt (1)

According to the raw material of yarn, composition and specification, the spindle rotation speed n of spinning machine (revolutions per second) before operation, be to set in advance.So the yarn twist twise calculating formula of twisting thread is:

twise＝n/v (2)

If yarn breaks end, according to the signal of the spinning running status detecting, the signal period of calculating spinning running status and yarn linear speed, the twist of twisting thread.Concrete steps are implemented as follows:

1. calculate cycle Δ t and the yarn linear speed of spinning run signal and the twist of twisting thread

(1) initializing variable

A, initialization sensor electrical die opening variable: Electro_Separat_Num=△ X;

B, initialization Yarn-spinning spindle rotating speed: Spindle_Speed=n;

C, initialization yarn linear speed variable: Yarn_Speed_Num=0;

D, initialize yarn twist variable: the Yarn_Twist_Num=0 that twists thread;

(2) computing cycle Δ t and yarn linear speed and the twist of twisting thread

A, selection T3 timer operation pattern are that free-running operation starts counting:

T3CTL.START︱＝00x40；

B, judge whether breakage sign Broken_Yarn__Flag is 1, if so, turn to i to carry out, otherwise, continue to carry out;

C, judge whether interrupt response sign Int_Response_Flag is 0, if so, turn to b to carry out, otherwise, continue to carry out;

D, clear Int_Response_Flag;

E, clear T1 timer counter: T1CNTH=0x00;

T1CNTL＝0x00；

F, calculating spinning run signal cycle Δ t:

$\mathrm{Operat}\_\mathrm{Cycle}\_\mathrm{Time}=\frac{\mathrm{Cycle}\_\mathrm{Counter}}{2\mathrm{MHz}}=\frac{\mathrm{Cycle}\_\mathrm{<figure-callout\; id="2"\; label="Counter"\; filenames="HDA0000400988170000052.png,HDA0000400988170000081.png"\; state="\{\{state\}\}">Counter</figure-callout>}}{2\&times;{10}^6\mathrm{Hz}}$

G, according to formula (1), calculate yarn linear speed:

$\mathrm{Yarn}\_\mathrm{Speed}\_\mathrm{Num}=\frac{\mathrm{Electro}\_\mathrm{Separat}\_\mathrm{Num}}{\mathrm{Operat}\_\mathrm{Cycle}\_\mathrm{Time}}$

H, according to formula (2), calculate the yarn twist of twisting thread:

$\mathrm{Yarn}\_\mathrm{Twist}\_\mathrm{Num}=\frac{\mathrm{Spindle}\_\mathrm{Speed}}{\mathrm{Yarn}\_\mathrm{Speed}\_\mathrm{Num}}$

I, T3 timer operation pattern is set is operation suspension: T3CTL.MODE &=～0x10;

J, T1 timer operation pattern is set is operation suspension: T1CTL.MODE &=～0x03;

K, 0 interruption masking of P0 port position is set forbids: P0IEN &=～0x01;

L, T3 timer is set overflows interruption masking and forbid: T3CTL.OVFIM &=～0x08;

M, end.

2. the spinning running state data of monitoring is wirelessly transmitted to wireless sense network

Utilize the RF transceiver of CC2530 Embedded, the medium access protocol based on time slot CSMA/CA, is sent to the result data of calculating in wireless network.Concrete steps are implemented as follows:

1. initiation parameter

A, frame control domain FCF value: Frame_Control_Field_Num=FCF is set;

// relevant with the frame type sending, security, confirmation request and designed attributes such as wireless network

B, the data sequence number of frame head is set: Data_Seq_Num=1;

C, the address information of frame head is set: PANID_ShortAddr=Address_Message;

// relevant with the device address of designed wireless network layout and distribution

2. the spinning running state data of monitoring is sent into transmit buffer TXFIFO

A, frame is set processes FCS by hardware verification: FRMCTRL0.AUTOCRC ︱=0x40;

B, arrange and control RF frequency at k passage: FREQCTRL.FREQ=11+5 (k-11); K<=26

Byte number in c, TXFIFO is stored in TXFIFOCNT register:

TXFIFOCNT＝11；

D, removing TXFIFO buffering area: SFLUSHTX;

E, Monitoring Data is write to TXFIFO:

RFD=12; Frame length (comprising 2 byte check codes)

RFD=Frame_Control_Field_Num; Frame control domain (2 byte)

RFD=Data_Seq_Num; Frame data sequence number (1 byte)

RFD=PANID_ShortAddr; Frame address information (4 byte)

RFD=Broken_Yarn__Flag; Breakage sign (1 byte)

RFD=Yarn_Speed_Num; Yarn linear speed (1 byte)

RFD=Yarn_Twist_Num; Yarn twist (1 byte)

3. data wireless in TXFIFO is sent to wireless sense network

A, the gating coprocessor CSP program of ceasing and desisting order are carried out: RFST=ISSTOP;

B, removing CSP program, pointer resets to 0:RFST=ISCLEAR;

C, x back-off period: RFST=WAITX of wait;

D, detect current idle channel assessment CCA state, whether passage is idle, if not, circular wait:

WHILE（～FSMSTAT1_CCA_Is_Valid）；

If f passage is idle, start to start wireless transmission Frame: RFST=STXONCCA;

G, detection also judge whether starting-frame delimiter is sent, if be not sent, and circular wait:

WHILE（～RFIRQF0_SFD_Is_1）；

H, detection also judge whether a Frame is sent, if be not sent, wait for that Frame is sent:

WHILE（～RFIRQF0.SFD_Is_0）；

If i Frame is sent, stops CSP program and carry out: RFST=SSTOP.

Claims (10)

1. for the sensor of the monitoring running state that spins, it is characterized in that, by the double-sided printed-circuit board with the gate-shaped electrode of special construction, made, front at printed circuit board (PCB), several very thin electrodes are equidistant and interconnect and form an electrode grid, be called shield grid, its profile forms a rectangle; At printed circuit reverse side, than the electrode of few one of front shield grid quantity, also interconnect, each electrode is just in time positioned at two electrode gaps of shield grid, and its profile also forms a rectangle.

2. for the wireless sensing node of the monitoring running state that spins, it is characterized in that, comprise the sensor (2), signal processing module (3), embedded microprocessor (4) and the power supply (5) that connect successively, the output of embedded microprocessor (4) is connected with wireless sense network (6) by Radio Transmission Technology;

Described sensor (2), by the double-sided printed-circuit board with the gate-shaped electrode of special construction, made, in the front of printed circuit board (PCB), several very thin electrodes are equidistant and interconnect and form an electrode grid, be called shield grid, its profile forms a rectangle; At printed circuit reverse side, than the electrode of few one of front shield grid quantity, also interconnect, each electrode is just in time positioned at two electrode gaps of shield grid, and its profile also forms a rectangle;

Described signal processing module (3), comprises the preamplifier (7), high-pass filter (8), peak amplifier (9), comparator (10) and the phaselocked loop (11) that connect successively.

3. the wireless sensing node for the monitoring running state that spins according to claim 2, is characterized in that, described embedded microprocessor (4) selects Nei Ji to have the CC2530 chip of wireless radio frequency transceiver.

4. the wireless sensing node for the monitoring running state that spins according to claim 2, is characterized in that, described power supply (5) passes through powered battery.

5. the wireless sensing node for the monitoring running state that spins according to claim 2, it is characterized in that described preamplifier (7) is comprised of two operational amplifier LMC6482, one-level is as follower, and another grade is that multiplication factor is 80 amplifier.

6. the wireless sensing node for the monitoring running state that spins according to claim 2, is characterized in that, described high-pass filter (8) is comprised of three rank high pass RC networks and an operational amplifier LMC6482.

7. the wireless sensing node for the monitoring running state that spins according to claim 2, is characterized in that, described peak amplifier (9) is comprised of an operational amplifier LMC6482 and two 1N4453 stabilized switch diodes.

8. the wireless sensing node for the monitoring running state that spins according to claim 2, is characterized in that, described comparator (10) is comprised of two operational amplifier LM339 and two rest-set flip-flops 7400.

9. the wireless sensing node for the monitoring running state that spins according to claim 2, is characterized in that, described phase locking unit (11) is comprised of a phaselocked loop HEF4046.

10. method for monitoring operation states spins, it is characterized in that, adopt the wireless sensing node for the monitoring running state that spins, its structure is to comprise sensor (2), signal processing module (3), embedded microprocessor (4) and the power supply (5) connecting successively, and the output of embedded microprocessor (4) is connected with wireless sense network (6) by Radio Transmission Technology; Described embedded microprocessor (4) selects Nei Ji to have the CC2530 chip of wireless radio frequency transceiver; Described power supply (5) passes through powered battery;

Described sensor (2), by the double-sided printed-circuit board with the gate-shaped electrode of special construction, made, in the front of printed circuit board (PCB), several very thin electrodes are equidistant and interconnect and form an electrode grid, be called shield grid, its profile forms a rectangle; At printed circuit reverse side, than the electrode of few one of front shield grid quantity, also interconnect, each electrode is just in time positioned at two electrode gaps of shield grid, and its profile also forms a rectangle;

Described signal processing module (3), comprises the preamplifier (7), high-pass filter (8), peak amplifier (9), comparator (10) and the phaselocked loop (11) that connect successively;

Described preamplifier (7), is comprised of two operational amplifier LMC6482, and one-level is as follower, and another grade is that multiplication factor is 80 amplifier; Described high-pass filter (8) is comprised of three rank high pass RC networks and an operational amplifier LMC6482; Described peak amplifier (9) is comprised of an operational amplifier LMC6482 and two 1N4453 stabilized switch diodes; Described comparator (10) is comprised of two operational amplifier LM339 and two rest-set flip-flops 7400; Described phase locking unit (11) is comprised of a phaselocked loop HEF4046;

Specifically according to following steps, implement:

Step 1: when yarn moves with a certain speed, the random electrostatic charge of utilizing yarn to carry, through electrostatic induction and the space filtering of sensor (2), obtains the clutter of a pulse wave that contains frequency component and low-frequency disturbance, specifically implements according to following steps:

Supposing only has a point charge at yarn, and the signals collecting principle of sensor (2) is as follows:

(1) yarn moves with respect to sensor (2) with a certain speed;

(2) when this point charge is through a certain electrode on signal grid, be just positioned at two electrode gap places of shield grid, so, at this electrode place, produce voltage signal, but it,, at other contiguous electrode places, is positioned on the electrode of shield grid, with regard to non-inductive or very little interference inductive voltage signal;

If the electrode on signal grid does not link together, so, when yarn moves through sensor (2) with a certain speed, this point charge produces a voltage signal U on each electrode of signal grid _s, and the voltage signal U producing on two adjacent electrodes (t) _sand U (t) _s(t+1) time difference of a Δ t will be had;

If all electrodes on signal grid are linked together, so, when spinning operation broken end does not occur, the output at sensor (2) is obtained to one and there is the pulse wave electric voltage signal U that the cycle is Δ t _s(t), otherwise, the output at sensor (2) is obtained be one without the level signal of pulse wave

mean that broken end appears in the spinning yarn on this spindle;

Step 2: signal processing module (3) is processed transducing signal, comprise that the clutter that utilizes preamplifier (7) to gather sensor (2) amplifies, the low-frequency interference signal of eliminating in preamplifier (7) output signal is processed in filtering through high-pass filter (8), by peak amplifier (9) by the amplitude modulation of the output signal of high-pass filter (8) to limit ± 0.7V amplitude between, utilize comparator (10) that the output signal of peak amplifier (9) is shaped to pulse sequence signal, finally, by the frequency modulation of phaselocked loop (11), phase modulation effect, stable pulse sequence frequency and phase place of pinning comparator (10) output, formation has basic frequency f _h, cycle uniformity pulse sequence signal,

Step 3: utilize embedded microprocessor (4) to detect the spinning operating state signal gathering, comprise and utilize the P1.2 pin of P1 port in CC2530 and timer to detect the rising edge of comparator (10) output signal in signal processing module (3), if in timing, the rising edge of pulse signal do not detected, show to occur breakage, otherwise, normal; Utilize the P0.0 pin of P0 port in CC2530 and timer to carrying out step-by-step counting between the adjacent rising edge of phaselocked loop (11) output pulse sequence signal in signal processing module (3), detect spinning run signal frequency, therefrom obtain breakage signal and spinning run signal cycle;

Step 4: utilize embedded microprocessor (4) to carry out computing to the signal of the spinning running status detecting, obtain the data of the breakage that spins on spindle, yarn linear speed, the twist of twisting thread, by integrated less radio-frequency RF transceiver in embedded microprocessor (4), the data of perception are sent in wireless sense network (6);

Suppose, interelectrode spacing is Δ x, so, and by the frequency of detecting sensor (2) output signal, i.e. cycle Δ t, calculates the linear speed v of yarn:

v＝Δx/Δt，

According to the raw material of yarn, composition and specification, the spindle rotation speed n of spinning machine is to set in advance before operation, so the yarn twist twise calculating formula of twisting thread is:

twise＝n/v。

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