CN104819849A - Engine measurement and control system based on lowpass amplification pulse wave modulation - Google Patents
Engine measurement and control system based on lowpass amplification pulse wave modulation Download PDFInfo
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- CN104819849A CN104819849A CN201510256432.3A CN201510256432A CN104819849A CN 104819849 A CN104819849 A CN 104819849A CN 201510256432 A CN201510256432 A CN 201510256432A CN 104819849 A CN104819849 A CN 104819849A
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Abstract
The invention discloses an engine measurement and control system based on lowpass amplification pulse wave modulation, which comprises a measured engine (1), a sensor system (3) and a servo motor (2) connected with the measured engine (1), a servo motor control system (4) connected with the servo motor (2), a test bench PC (6) connected with the servo motor control system (4), and a background server (7) connected with the test bench PC (6). The system is characterized in that a lowpass amplification pulse wave modulation circuit (5) is also arranged between the sensor system (3) and the test bench PC (6). Due to the lowpass amplification pulse wave modulation circuit, parameter signals of the measured engine can be amplified, and signals received by the test bench PC are more distinct and more accurate.
Description
Technical field
The present invention relates to a kind of engine TT&C system, specifically refer to a kind of engine TT&C system of amplifying pulse wave modulation based on low pass.
Background technology
People improve constantly the reliability of automobile, the requirement of the aspect such as security and green, and engine is as the heart component of automobile, its technical merit directly has influence on the performance index such as its dynamic property, economy and discharge, and the frequency of engine breakdown is also the highest.Engine performance measuring is the Main Means judging condition of the engine quality, and be also the important content of automotive check and maintenance job, therefore engine performance measuring is more and more subject to people's attention.As the detection system of test engine performance, engine TT&C system then seems that by for important, it is detection system indispensable on car engine machine production line.But, traditional engine TT&C system its cannot well process the every engine signal collected, thus cause system to engine various performance parameters test inaccurate, affect the outgoing of engine.Therefore, a kind of high-precision engine control system is provided to be then the current task of top priority.
Summary of the invention
It tests inaccurate defect to engine parameter to the object of the invention is to overcome traditional engine TT&C system, provides a kind of engine TT&C system of amplifying pulse wave modulation based on low pass.
Object of the present invention is achieved through the following technical solutions: a kind of engine TT&C system of amplifying pulse wave modulation based on low pass, it comprises tested engine, the sensing system be connected with tested engine and servomotor, the servo control system be connected with servomotor, the test board PC be connected with servo control system, the background server be connected with test board PC, is also provided with low pass and amplifies pulse wave modulation circuit between sensing system and test board PC.
Further, described low pass amplifies pulse wave modulation circuit by amplifier P1, modulation chip U1, triode VT6, positive pole is connected with the positive pole of amplifier P1, negative pole then amplifies the polar capacitor C4 of pulse wave modulation circuit input end as this low pass, one end is connected with the positive pole of amplifier P1, the resistance R10 of other end ground connection, be serially connected in the resistance R12 between the positive pole of amplifier P1 and output terminal, one end is connected with the negative pole of amplifier P1, the resistance R11 of ground connection while the other end is then connected with the CONT pin of modulation chip U1, one end is connected with the CONT pin of modulation chip U1, the resistance R13 that the other end is then connected with the base stage of triode VT6, minus earth, the polar capacitor C5 that positive pole is then connected with the RESET pin of modulation chip U1 after resistance R15, and form with the resistance R14 that resistance R15 is in parallel, the positive pole of described amplifier P1 connects 10V voltage, its output terminal and is then connected with TRIG pin with the VCC pin of modulation chip U1 respectively, ground connection while the GND pin of described modulation chip U1 is connected with the base stage of triode VT6, its THRES pin are then connected with the collector of triode VT6, DISCH pin is then respectively with the collector of triode VT6 and amplify the output terminal of pulse wave modulation circuit while the positive pole of polar capacitor C4 is connected, its OUT pin is then connected with the positive pole of polar capacitor C4 as this low pass.
Described servo control system is then by symmetrical expression field effect transistor driving circuit, and the trigger circuit be connected with symmetrical expression field effect transistor driving circuit form.Described symmetrical expression field effect transistor driving circuit is then by the first driving circuit, and the second driving circuit be connected with the first driving circuit forms.
Described first driving circuit is by triode VT1, field effect transistor Q1, field effect transistor Q2, one end is connected with the grid of field effect transistor Q2, the other end is then as the resistance R3 of the input end of this first driving circuit, the diode D1 be in parallel with resistance R3, one end is connected with the base stage of triode VT1, the resistance R1 that the other end is then connected with the P pole of diode D1, N pole is connected with the collector of triode VT1, the diode D2 of ground connection while P pole is then connected with the drain electrode of field effect transistor Q2, P pole is connected with the second driving circuit, the diode D3 that N pole is then connected with the collector of triode VT1 after resistance R2, and positive pole is connected with the N pole of diode D3, the polar capacitor C1 that negative pole is then connected with the P pole of diode D2 forms, the P pole of described diode D1 is extremely all connected with trigger circuit with N, grounded emitter, its collector of described triode VT1 are then connected with the grid of field effect transistor Q1, the drain electrode of described field effect transistor Q1 is connected with the N pole of diode D3, its source electrode is then connected with the drain electrode of field effect transistor Q2, the source electrode of described field effect transistor Q2 is then connected with the second driving circuit and trigger circuit respectively.
The second described driving circuit is by field effect transistor Q3, field effect transistor Q4, triode VT5, one end is connected with the grid of field effect transistor Q4, the other end is then as the resistance R8 of the output terminal of this second driving circuit, the diode D6 be in parallel with resistance R8, one end is connected with the base stage of triode VT5, the resistance R9 that the other end is then connected with the P pole of diode D6, N pole is connected with the collector of triode VT5, the diode D5 of ground connection while P pole is then connected with the drain electrode of field effect transistor Q4, P pole is connected with the P pole of diode D3, the diode D4 that N pole is then connected with the collector of triode VT5 after resistance R7, and positive pole is connected with the N pole of diode D4, the polar capacitor C3 that negative pole is then connected with the P pole of diode D5 forms, the P pole of described diode D6 is also connected with trigger circuit, grounded emitter, its collector of triode VT5 are then connected with the grid of field effect transistor Q3, the drain electrode of described field effect transistor Q3 is connected with the N pole of diode D4, its source electrode is then connected with the drain electrode of field effect transistor Q4, the source electrode of described field effect transistor Q4 is then connected with the source electrode of field effect transistor Q2.
Described trigger circuit are by triode VT2, triode VT3, flip chip U, the resistance R4 be in parallel with diode D1, the resistance R5 that one end is connected with the P pole of diode D1, the other end is then connected with the base stage of triode VT2, the resistance R6 of ground connection while one end is connected with the source electrode of field effect transistor Q2, the other end is then connected with the RESET pin of flip chip U, and the polar capacitor C2 that negative pole is connected with the emitter of triode VT3, positive pole is then connected with the base stage of triode VT4 forms; Grounded emitter, its collector of described triode VT2 are then connected with the N pole of diode D1; The base stage of described triode VT3 is connected with the collector of triode VT2, its collector is then connected with the collector of triode VT4; The grounded emitter of described triode VT4, its collector are then connected with the CLK pin of flip chip U and DATA pin respectively; The SET pin of described flip chip U is connected with its RESET pin, its Q2 pin is then connected with the P pole of diode D6.
In order to reach better effect, described flip chip U is preferably CD4013 integrated circuit, field effect transistor Q1, field effect transistor Q2, field effect transistor Q3 and field effect transistor Q4 are then all preferably enhancement mode PNP field effect transistor, and modulation chip U1 is preferably NE555 integrated circuit to realize.
The present invention comparatively prior art compares, and has the following advantages and beneficial effect:
(1) the present invention uses servomotor to drag tested engine rotation, does not burn, when not doing work, using sensor to gather related data and analyze, assessing engine performance by calculating various engine parameter at engine.
(2) the present invention does not need the resource such as fuel consumption, chilled water, saves the cost in engine testing process.
(3) the present invention is without the need to combustion process, therefore energy-saving and environmental protection more.
(4) the present invention amplifies the effect of pulse wave modulation circuit by low pass, and can amplify the parameter signal of tested engine, the signal that test board PC is received is more clear, accurate.
Accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present invention;
Fig. 2 is servo control system electrical block diagram of the present invention;
Fig. 3 is that low pass of the present invention amplifies pulse wave modulation circuit structural representation.
Reference numeral name in above accompanying drawing is called:
1-tested engine, 2-servomotor, 3-sensing system, 4-servo control system, 5-low pass amplifies pulse wave modulation circuit, 6-test board PC, 7-background server.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment
As shown in Figure 1, the present invention includes tested engine 1, the sensing system 3 be connected with tested engine 1 and servomotor 2, the servo control system 4 be connected with servomotor 2, the test board PC6 be connected with servo control system 4, the background server 7 be connected with test board PC6, in order to reach object of the present invention, the present invention is also provided with low pass and amplifies pulse wave modulation circuit 5 between sensing system 3 and test board PC6.
Wherein, sensing system 3 is made up of multiple sensor, and the present embodiment preferentially adopts torque sensor, temperature sensor and vibration transducer to realize, and it is for gathering moment of torsion, the signal such as temperature and vibration of tested engine 1.Parameter signal when low pass amplifies pulse wave modulation circuit 5 for working to tested engine 1 carries out amplification process, and the signal after process is more clear.Servomotor 2 works for driving tested engine 1, and by adjusting the rotating speed of servomotor 2, the present invention can test the various data of tested engine 1 under different rotating speeds.Test board PC6 is as man-machine conversation window of the present invention, tester can send instruction to servo control system 4 on test board PC6, controlled by the rotating speed of servo control system 4 pairs of servomotors 2, simultaneously, test board PC6 can also receive the various parameters of tested engine 1, and sends to background server 7.Background server 7 stores all standard parameter of tested engine 1, its real-time parameter by the tested engine 1 of contrast and canonical parameter, thus judges that whether the properties of tested engine 1 is up to standard.
Background server 7 adopts existing computing machine, and test board PC6 then adopts existing single-chip microcomputer, and servomotor 2, sensing system 3 all adopt existing technology to realize.It is then emphasis of the present invention that low pass amplifies pulse wave modulation circuit 5.
As shown in Figure 2, this servo control system 4 is by symmetrical expression field effect transistor driving circuit, and the trigger circuit be connected with symmetrical expression field effect transistor driving circuit form.Described symmetrical expression field effect transistor driving circuit is then by the first driving circuit, and the second driving circuit be connected with the first driving circuit forms.
Described first driving circuit is by triode VT1, field effect transistor Q1, field effect transistor Q2, one end is connected with the grid of field effect transistor Q2, the other end is then as the resistance R3 of the input end of this first driving circuit, the diode D1 be in parallel with resistance R3, one end is connected with the base stage of triode VT1, the resistance R1 that the other end is then connected with the P pole of diode D1, N pole is connected with the collector of triode VT1, the diode D2 of ground connection while P pole is then connected with the drain electrode of field effect transistor Q2, P pole is connected with the second driving circuit, the diode D3 that N pole is then connected with the collector of triode VT1 after resistance R2, and positive pole is connected with the N pole of diode D3, the polar capacitor C1 that negative pole is then connected with the P pole of diode D2 forms.The P pole of described diode D1 is extremely all connected with trigger circuit with N; Grounded emitter, its collector of described triode VT1 are then connected with the grid of field effect transistor Q1; The drain electrode of described field effect transistor Q1 is connected with the N pole of diode D3, its source electrode is then connected with the drain electrode of field effect transistor Q2; The source electrode of described field effect transistor Q2 is then connected with the second driving circuit and trigger circuit respectively.
The second described driving circuit is by field effect transistor Q3, field effect transistor Q4, triode VT5, one end is connected with the grid of field effect transistor Q4, the other end is then as the resistance R8 of the output terminal of this second driving circuit, the diode D6 be in parallel with resistance R8, one end is connected with the base stage of triode VT5, the resistance R9 that the other end is then connected with the P pole of diode D6, N pole is connected with the collector of triode VT5, the diode D5 of ground connection while P pole is then connected with the drain electrode of field effect transistor Q4, P pole is connected with the P pole of diode D3, the diode D4 that N pole is then connected with the collector of triode VT5 after resistance R7, and positive pole is connected with the N pole of diode D4, the polar capacitor C3 that negative pole is then connected with the P pole of diode D5 forms.The P pole of described diode D6 is also connected with trigger circuit; Grounded emitter, its collector of triode VT5 are then connected with the grid of field effect transistor Q3; The drain electrode of described field effect transistor Q3 is connected with the N pole of diode D4, its source electrode is then connected with the drain electrode of field effect transistor Q4; The source electrode of described field effect transistor Q4 is then connected with the source electrode of field effect transistor Q2.
Signal carries out reverse drive through field effect transistor Q3 and field effect transistor Q4 again after field effect transistor Q1 and field effect transistor Q2 drives, thus improves the control accuracy of the present invention to servomotor 2.Better drive effect to reach, described field effect transistor Q1, field effect transistor Q2, field effect transistor Q3 and field effect transistor Q4 preferentially adopt enhancement mode PNP field effect transistor to realize.
Described trigger circuit are by triode VT2, triode VT3, flip chip U, the resistance R4 be in parallel with diode D1, the resistance R5 that one end is connected with the P pole of diode D1, the other end is then connected with the base stage of triode VT2, the resistance R6 of ground connection while one end is connected with the source electrode of field effect transistor Q2, the other end is then connected with the RESET pin of flip chip U, and the polar capacitor C2 that negative pole is connected with the emitter of triode VT3, positive pole is then connected with the base stage of triode VT4 forms.Grounded emitter, its collector of described triode VT2 are then connected with the N pole of diode D1; The base stage of described triode VT3 is connected with the collector of triode VT2, its collector is then connected with the collector of triode VT4; The grounded emitter of described triode VT4, its collector are then connected with the CLK pin of flip chip U and DATA pin respectively; The SET pin of described flip chip U is connected with its RESET pin, its Q2 pin is then connected with the P pole of diode D6.In order to reach better implementation result, described flip chip U is preferably CD4013 integrated circuit to realize.
As shown in Figure 3, this low pass amplifies pulse wave modulation circuit 5 by amplifier P1, and modulation chip U1, triode VT6, polar capacitor C4, polar capacitor C5, resistance R10, resistance R11, resistance R12, resistance R13, resistance R14 and resistance R15 form.During connection, the positive pole of polar capacitor C4 is connected with the positive pole of amplifier P1, its negative pole then amplifies pulse wave modulation circuit 5 input end as this low pass, one end of resistance R10 is connected with the positive pole of amplifier P1, its other end ground connection, between the positive pole that resistance R12 is then serially connected in amplifier P1 and output terminal, one end of resistance R11 is connected with the negative pole of amplifier P1, ground connection while its other end is then connected with the CONT pin of modulation chip U1, one end of resistance R13 is connected with the CONT pin of modulation chip U1, its other end is then connected with the base stage of triode VT6, the minus earth of polar capacitor C5, its positive pole is then connected with the RESET pin of modulation chip U1 after resistance R15, resistance R14 is then in parallel with resistance R15.The positive pole of described amplifier P1 connects 10V voltage, its output terminal and is then connected with TRIG pin with the VCC pin of modulation chip U1 respectively.Ground connection while the GND pin of described modulation chip U1 is connected with the base stage of triode VT6, its THRES pin are then connected with the collector of triode VT6, DISCH pin is then respectively with the collector of triode VT6 and amplify the output terminal of pulse wave modulation circuit 5 while the positive pole of polar capacitor C4 is connected, its OUT pin is then connected with the positive pole of polar capacitor C4 as this low pass.This low pass amplifies pulse wave modulation circuit 5 can carry out amplification process to the parameter signal of tested engine 1, and the signal after process is more clear.
As mentioned above, just well the present invention can be realized.
Claims (8)
1. one kind is amplified the engine TT&C system of pulse wave modulation based on low pass, it is by tested engine (1), the sensing system (3) be connected with tested engine (1) and servomotor (2), the servo control system (4) be connected with servomotor (2), the test board PC(6 be connected with servo control system (4)), and with test board PC(6) background server (7) that is connected forms, it is characterized in that: at sensing system (3) and test board PC(6) between be also provided with low pass and amplify pulse wave modulation circuit (5), described low pass amplifies pulse wave modulation circuit (5) by amplifier P1, modulation chip U1, triode VT6, positive pole is connected with the positive pole of amplifier P1, negative pole then amplifies the polar capacitor C4 of pulse wave modulation circuit (5) input end as this low pass, one end is connected with the positive pole of amplifier P1, the resistance R10 of other end ground connection, be serially connected in the resistance R12 between the positive pole of amplifier P1 and output terminal, one end is connected with the negative pole of amplifier P1, the resistance R11 of ground connection while the other end is then connected with the CONT pin of modulation chip U1, one end is connected with the CONT pin of modulation chip U1, the resistance R13 that the other end is then connected with the base stage of triode VT6, minus earth, the polar capacitor C5 that positive pole is then connected with the RESET pin of modulation chip U1 after resistance R15, and form with the resistance R14 that resistance R15 is in parallel, the positive pole of described amplifier P1 connects 10V voltage, its output terminal and is then connected with TRIG pin with the VCC pin of modulation chip U1 respectively, ground connection while the GND pin of described modulation chip U1 is connected with the base stage of triode VT6, its THRES pin are then connected with the collector of triode VT6, DISCH pin is then respectively with the collector of triode VT6 and amplify the output terminal of pulse wave modulation circuit (5) while the positive pole of polar capacitor C4 is connected, its OUT pin is then connected with the positive pole of polar capacitor C4 as this low pass.
2. a kind of engine TT&C system of amplifying pulse wave modulation based on low pass according to claim 1, it is characterized in that: described servo control system (4) is then by symmetrical expression field effect transistor driving circuit, and the trigger circuit be connected with symmetrical expression field effect transistor driving circuit form; Described symmetrical expression field effect transistor driving circuit is then by the first driving circuit, and the second driving circuit be connected with the first driving circuit forms.
3. a kind of engine TT&C system of amplifying pulse wave modulation based on low pass according to claim 2, it is characterized in that: described first driving circuit is by triode VT1, field effect transistor Q1, field effect transistor Q2, one end is connected with the grid of field effect transistor Q2, the other end is then as the resistance R3 of the input end of this first driving circuit, the diode D1 be in parallel with resistance R3, one end is connected with the base stage of triode VT1, the resistance R1 that the other end is then connected with the P pole of diode D1, N pole is connected with the collector of triode VT1, the diode D2 of ground connection while P pole is then connected with the drain electrode of field effect transistor Q2, P pole is connected with the second driving circuit, the diode D3 that N pole is then connected with the collector of triode VT1 after resistance R2, and positive pole is connected with the N pole of diode D3, the polar capacitor C1 that negative pole is then connected with the P pole of diode D2 forms, the P pole of described diode D1 is extremely all connected with trigger circuit with N, grounded emitter, its collector of described triode VT1 are then connected with the grid of field effect transistor Q1, the drain electrode of described field effect transistor Q1 is connected with the N pole of diode D3, its source electrode is then connected with the drain electrode of field effect transistor Q2, the source electrode of described field effect transistor Q2 is then connected with the second driving circuit and trigger circuit respectively.
4. a kind of engine TT&C system of amplifying pulse wave modulation based on low pass according to claim 3, it is characterized in that: the second described driving circuit is by field effect transistor Q3, field effect transistor Q4, triode VT5, one end is connected with the grid of field effect transistor Q4, the other end is then as the resistance R8 of the output terminal of this second driving circuit, the diode D6 be in parallel with resistance R8, one end is connected with the base stage of triode VT5, the resistance R9 that the other end is then connected with the P pole of diode D6, N pole is connected with the collector of triode VT5, the diode D5 of ground connection while P pole is then connected with the drain electrode of field effect transistor Q4, P pole is connected with the P pole of diode D3, the diode D4 that N pole is then connected with the collector of triode VT5 after resistance R7, and positive pole is connected with the N pole of diode D4, the polar capacitor C3 that negative pole is then connected with the P pole of diode D5 forms, the P pole of described diode D6 is also connected with trigger circuit, grounded emitter, its collector of triode VT5 are then connected with the grid of field effect transistor Q3, the drain electrode of described field effect transistor Q3 is connected with the N pole of diode D4, its source electrode is then connected with the drain electrode of field effect transistor Q4, the source electrode of described field effect transistor Q4 is then connected with the source electrode of field effect transistor Q2.
5. a kind of engine TT&C system of amplifying pulse wave modulation based on low pass according to claim 4, it is characterized in that: described trigger circuit are by triode VT2, triode VT3, flip chip U, the resistance R4 be in parallel with diode D1, one end is connected with the P pole of diode D1, the resistance R5 that the other end is then connected with the base stage of triode VT2, one end is connected with the source electrode of field effect transistor Q2, the resistance R6 of ground connection while the other end is then connected with the RESET pin of flip chip U, and negative pole is connected with the emitter of triode VT3, the polar capacitor C2 that positive pole is then connected with the base stage of triode VT4 forms, grounded emitter, its collector of described triode VT2 are then connected with the N pole of diode D1, the base stage of described triode VT3 is connected with the collector of triode VT2, its collector is then connected with the collector of triode VT4, the grounded emitter of described triode VT4, its collector are then connected with the CLK pin of flip chip U and DATA pin respectively, the SET pin of described flip chip U is connected with its RESET pin, its Q2 pin is then connected with the P pole of diode D6.
6. a kind of engine TT&C system of amplifying pulse wave modulation based on low pass according to claim 5, is characterized in that: described flip chip U is CD4013 integrated circuit.
7. a kind of engine TT&C system of amplifying pulse wave modulation based on low pass according to claim 6, is characterized in that: described field effect transistor Q1, field effect transistor Q2, field effect transistor Q3 and field effect transistor Q4 are enhancement mode PNP field effect transistor.
8. a kind of engine TT&C system of amplifying pulse wave modulation based on low pass according to any one of Claims 1 to 5, is characterized in that: described modulation chip U1 is NE555 integrated circuit.
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| CN201510256432.3A CN104819849A (en) | 2015-05-19 | 2015-05-19 | Engine measurement and control system based on lowpass amplification pulse wave modulation |
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| CN201510256432.3A CN104819849A (en) | 2015-05-19 | 2015-05-19 | Engine measurement and control system based on lowpass amplification pulse wave modulation |
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