CN103852623A - Device for acquiring voltage and current of capacitive photovoltaic cell - Google Patents
Device for acquiring voltage and current of capacitive photovoltaic cell Download PDFInfo
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- CN103852623A CN103852623A CN201410109388.9A CN201410109388A CN103852623A CN 103852623 A CN103852623 A CN 103852623A CN 201410109388 A CN201410109388 A CN 201410109388A CN 103852623 A CN103852623 A CN 103852623A
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Abstract
The invention provides a device for acquiring the voltage and current of a capacitive photovoltaic cell. The device comprises a sampling module, a voltage signal measuring module, a current signal measuring module, an MCU (Microprogrammed Control Unit) signal processing module and a manual gear selecting module, wherein the manual gear selecting module is used for selecting a measured gear according to the parameters of a measured photovoltaic cell, a gear selecting signal is sent to the voltage signal measuring module and the current signal measuring module through the MCU signal processing module to determine the measured gear; the sampling module samples the acquired voltage and current signals of the output end of the photovoltaic cell and respectively transmits to the voltage signal measuring module and the current signal measuring module for amplification and filtration processing, and the processed signal is sent to the MCU signal processing module to be processed and then uploaded to superior monitoring equipment for use. The device provided by the invention has the advantages of simple circuit structure, lower cost, high sampling accuracy, short sampling period and good working stability, and is convenient to operate.
Description
Technical field
The present invention relates to the electric current and voltage detection technique field of photovoltaic cell output, be specifically related to a kind of voltage that utilizes capacitor charge and discharge technology to export photovoltaic cell, the device that electric current gathers.
Background technology
Current, the application of solar electrical energy generation is more and more extensive.In solar electrical energy generation process, need to carry out real-time sampling to voltage, the electric current of photovoltaic cell output, to meet the monitoring demand of upper level system or power network dispatching system.At present, photovoltaic power station monitoring system is mainly provided with equipment by inverter manufacturer, due to inverter, manufacturer is numerous, each inverter Chang Duanjuncong our factory inverter sets out, select the electric current and voltage harvester of corresponding photovoltaic cell, the product of different vendor each other cannot be compatible, thereby bring difficulty to the work of solar power station actual monitored; The monitoring of solar power station is difficult to form convenient, unified monitoring system.In addition, one of major defect of photovoltaic generation is that the photoelectric transformation efficiency of solar battery array is too low, for addressing this problem, the important channel adopting is at present to adopt MPPT maximum power point tracking (MPPT) technology, and the working point by real-time adjustment photovoltaic cell is to reaching the maximization of photovoltaic battery array output power.The first step of implementing MPPT maximum power point tracking (MPPT) technology is samples to voltage, the electric current of photovoltaic battery array output, and its device for sampling at present, its circuit structure relative complex, sampling precision is not high, and the sampled measurements time is length and less stable.
Summary of the invention
The object of the invention is: for deficiency of the prior art, provide that a kind of circuit structure is simple, cost is lower, sampling precision is higher, the sampling period is short, the condenser type photovoltaic cell electric current and voltage harvester of easy to operate and good operating stability.
Technical scheme of the present invention is: condenser type photovoltaic cell electric current and voltage harvester of the present invention, and its design feature is: comprise sampling module, voltage signal measurement module, current signal measurement module, MCU signal processing module and manual gear selecting module;
Above-mentioned sampling module is provided with first signal input end, secondary signal input end, the first control signal input end, the second control signal input end, voltage signal output end and current signal output end; Voltage signal measurement module is provided with voltage signal input end, the first selective stage signal input end, the second selective stage signal input end and voltage signal output end; Current signal measurement module is provided with current signal input end, the first selective stage signal input end, the second selective stage signal input end and current signal output end; MCU signal processing module is provided with the first control end, the second control end, the first selective stage signal output terminal, the second selective stage signal output terminal, the 3rd selective stage signal output terminal, the 4th selective stage signal output terminal, voltage signal input end, current signal input end, selective stage signal input end and voltage and current signal output terminal; Manually gear selecting module is provided with signal output part and power end;
When the first signal input end of sampling module uses with secondary signal input end, correspondence is connected with positive pole and the negative electricity of tested photovoltaic cell respectively; The first control signal input end of sampling module and the second control signal input end are corresponding to be respectively electrically connected with the first control end and the second control end signal of MCU signal processing module; The voltage signal input end of voltage signal measurement module is electrically connected with the voltage signal output end signal of sampling module; The first selective stage signal input end of voltage signal measurement module and the second selective stage signal input end are corresponding to be respectively electrically connected with the first selective stage signal output terminal and the second selective stage signal output end signal of MCU signal processing module; The voltage signal input end of MCU signal processing module is electrically connected with the voltage signal output end signal of voltage signal measurement module; The current signal input end of current signal measurement module is electrically connected with the current signal output end signal of sampling module; The first selective stage signal input end of current signal measurement module and the second selective stage signal input end are corresponding to be respectively electrically connected with the 3rd selective stage signal output terminal and the 4th selective stage signal output end signal of MCU signal processing module; The current signal input end of MCU signal processing module is electrically connected with the current signal output end signal of current signal measurement module; The selective stage signal input end of MCU signal processing module is electrically connected with the selective stage signal output end signal of manual gear selecting module; Connect+5V direct supply when manually the power end of gear selecting module uses; The voltage and current signal output terminal of MCU signal processing module is electrically connected with higher level's watch-dog signal while use.
Further scheme is: above-mentioned sampling module comprises electrochemical capacitor C, field effect transistor S
1, field effect transistor S
2with sample rate current resistance R;
Positive level and the field effect transistor S of above-mentioned electrochemical capacitor C
2drain electrode form a common junction because of conllinear, this common junction is the first signal input end of above-mentioned sampling module, is also the voltage signal output end of above-mentioned sampling module simultaneously; The negative pole of electrochemical capacitor C, field effect transistor S
2source electrode and field effect transistor S
1leakage level conllinear; Field effect transistor S
1drain electrode and one end of sampling resistor R form a common junction because of conllinear, this common junction is the current signal output end of above-mentioned sampling module; The other end of sampling resistor R had been both the secondary signal input end of above-mentioned sampling module; Field effect transistor S
2grid be the first control signal input end of sampling module; Field effect transistor S
1grid be the second control signal input end of sampling module.
Further scheme is: above-mentioned voltage signal measurement module comprises MUX U1, reverse proportion operational amplifier T1, divider resistance R
1, divider resistance R
2, divider resistance R
3, divider resistance R
4, resistance R
5, resistance R _ f 1 and filter capacitor C1; MUX U1 is provided with the first selection input end, second and selects input end, the 3rd to select input end, the first address mouth A
0, the second address mouth A
1and signal output part; The first address mouth A of MUX U1
0be the first selective stage signal input end of above-mentioned voltage signal measurement module; The second address mouth A of MUX U1
1be the second selective stage signal input end of above-mentioned voltage signal measurement module;
Divider resistance R
1one end be the voltage signal input end of above-mentioned voltage signal measurement module; Divider resistance R
1the other end, divider resistance R
2one end and MUX U1 first select input end conllinear; Divider resistance R
2the other end, divider resistance R
3one end and MUX U1 second select input end conllinear; Divider resistance R
3the other end, divider resistance R
4one end and MUX U1 the 3rd select input end conllinear; Resistance R
5one end be electrically connected with the signal output part of MUX U1; Resistance R
5one end and the reverse inverting input conllinear of proportion operational amplifier T1 of the other end, resistance R _ f 1; Oppositely output terminal, one end of resistance R _ f 1 and one end of filter capacitor C1 of proportion operational amplifier T1 form a common junction because of conllinear, and this common junction is the voltage signal output end of above-mentioned voltage signal measurement module; Oppositely positive, the divider resistance R of proportion operational amplifier T1
4the other end and the equal ground connection of the other end of filter capacitor C1.
Further scheme is: above-mentioned current signal measurement module comprises MUX U2, reverse proportion operational amplifier T2, resistance R
6, resistance R
7, resistance R
8, resistance R
9, resistance R
10, resistance R _ f 2 and filter capacitor C2; MUX U2 is provided with the first selection input end, second and selects input end, the 3rd to select input end, the first address mouth A
2, the second address mouth A
3and signal output part; The first address mouth A of MUX U2
2be the first selective stage signal input end of above-mentioned current signal measurement module; The second address mouth A of MUX U2
3be the second selective stage signal input end of above-mentioned current signal measurement module;
Resistance R
6one end be the current signal input end of above-mentioned current signal measurement module; Resistance R
6the other end, resistance R
7one end and MUX U2 first select input end conllinear; Resistance R
7the other end, resistance R
8one end and MUX U2 second select input end conllinear; Resistance R
8the other end, divider resistance R
9one end and MUX U2 the 3rd select input end conllinear; Resistance R
10one end be electrically connected with the signal output part of MUX U2; Resistance R
10one end and the reverse inverting input conllinear of proportion operational amplifier T2 of the other end, resistance R _ f 2; Oppositely output terminal, one end of resistance R _ f 2 and one end of filter capacitor C2 of proportion operational amplifier T2 form a common junction because of conllinear, and this common junction is the current signal output end of above-mentioned current signal measurement module; Oppositely positive, the resistance R of proportion operational amplifier T2
9the other end and the equal ground connection of the other end of filter capacitor C2.
Further scheme is: above-mentioned manual gear selecting module comprises plucking number sign switch, resistance R
11, resistance R
12, resistance R
13and resistance R
14; Above-mentioned plucking number sign switch is the rotary encoder of LJV model; Plucking number sign switch has A, B, C, L, R wiring pin; The A wiring pin of plucking number sign switch, B wiring pin, resistance R
11one end and resistance R
12one end form a common junction because of conllinear, this common junction is the power end of aforesaid manual gear selecting module; The L wiring pin of plucking number sign switch, resistance R
11the other end and resistance R
13one end conllinear; The R wiring pin of plucking number sign switch, resistance R
12the other end and resistance R
14one end conllinear; The C wiring pin of plucking number sign switch, resistance R
13the other end and resistance R
14the other end form a common junction because of conllinear, this common junction is the selective stage signal output terminal of aforesaid manual gear selecting module.
Further scheme is: above-mentioned field effect transistor S
1with field effect transistor S
2for the field effect transistor of F1010E model; Above-mentioned electrochemical capacitor C is the electrochemical capacitor of 6800 μ F/50V.
Further scheme also has: above-mentioned MUX U1, MUX U2 is the MUX of CD4051 model; Oppositely proportion operational amplifier T1, reverse proportion operational amplifier T2 are the operational amplifier of OPA333 model.
The present invention has positive effect: (1) condenser type photovoltaic cell of the present invention electric current and voltage harvester, its than with traditional photovoltaic cell data collector, circuit structure is simple, cost is lower, easy to operate, good operating stability.(2) condenser type photovoltaic cell electric current and voltage harvester of the present invention, according to the parameter of tested photovoltaic cell, adopts stepping formula measuring method, and sampling precision is higher, the sampling period is short.(3) condenser type photovoltaic cell electric current and voltage harvester of the present invention can use in rugged environment, and applicability is strong.
Brief description of the drawings
Fig. 1 is the circuit structure block diagram of condenser type photovoltaic cell electric current and voltage harvester of the present invention, has also shown the electrical connection of itself and photovoltaic cell E in figure;
Fig. 2 is the electrical schematic diagram of the sampling module in Fig. 1, has also shown the electrical connection of itself and photovoltaic cell E in figure;
Fig. 3 is the electrical schematic diagram of the voltage signal measurement module in Fig. 1;
Fig. 4 is the electrical schematic diagram of the current signal measurement module in Fig. 1;
Fig. 5 is the electrical schematic diagram of the manual gear selecting module in Fig. 1.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
(embodiment 1)
See Fig. 1, the condenser type photovoltaic cell electric current and voltage harvester of the present embodiment, is mainly made up of sampling module, voltage signal measurement module, current signal measurement module, MCU signal processing module and manual gear selecting module.
Sampling module is provided with first signal input end, secondary signal input end, the first control signal input end, the second control signal input end, voltage signal output end and current signal output end; Voltage signal measurement module is provided with voltage signal input end, the first selective stage signal input end, the second selective stage signal input end and voltage signal output end; Current signal measurement module is provided with current signal input end, the first selective stage signal input end, the second selective stage signal input end and current signal output end; MCU signal processing module is provided with the first control end, the second control end, the first selective stage signal output terminal, the second selective stage signal output terminal, the 3rd selective stage signal output terminal, the 4th selective stage signal output terminal, voltage signal input end, current signal input end, selective stage signal input end and voltage and current signal output terminal; Manually gear selecting module is provided with signal output part and power end.
When the first signal input end of sampling module uses with secondary signal input end, correspondence is connected with positive pole and the negative electricity of photovoltaic cell E respectively; The first control signal input end of sampling module and the second control signal input end are corresponding to be respectively electrically connected with the first control end and the second control end signal of MCU signal processing module; The voltage signal input end of voltage signal measurement module is electrically connected with the voltage signal output end signal of sampling module; The first selective stage signal input end of voltage signal measurement module and the second selective stage signal input end are corresponding to be respectively electrically connected with the first selective stage signal output terminal and the second selective stage signal output end signal of MCU signal processing module; The voltage signal input end of MCU signal processing module is electrically connected with the voltage signal output end signal of voltage signal measurement module; The current signal input end of current signal measurement module is electrically connected with the current signal output end signal of sampling module; The first selective stage signal input end of current signal measurement module and the second selective stage signal input end are corresponding to be respectively electrically connected with the 3rd selective stage signal output terminal and the 4th selective stage signal output end signal of MCU signal processing module; The current signal input end of MCU signal processing module is electrically connected with the current signal output end signal of current signal measurement module; The selective stage signal input end of MCU signal processing module is electrically connected with the selective stage signal output end signal of manual gear selecting module; Connect+5V direct supply when manually the power end of gear selecting module uses; The voltage and current signal output terminal of MCU signal processing module is electrically connected with higher level's watch-dog signal while use.
See Fig. 2, aforesaid sampling module is mainly by electrochemical capacitor C, field effect transistor S
1, field effect transistor S
2form with sample rate current resistance R.Positive level and the field effect transistor S of electrochemical capacitor C
2drain electrode form a common junction because of conllinear, this common junction is the first signal input end of aforesaid sampling module, is also the voltage signal output end (marking U in figure) of sampling module simultaneously; The negative pole of electrochemical capacitor C, field effect transistor S
2source electrode and field effect transistor S
1leakage level conllinear.Field effect transistor S
1drain electrode and one end of sampling resistor R form a common junction because of conllinear, this common junction is the current signal output end (marking I in figure) of aforesaid sampling module; The other end of sampling resistor R had been both the secondary signal input end of aforesaid sampling module; Field effect transistor S
2grid be the first control signal input end of sampling module; Field effect transistor S
1grid be the second control signal input end of sampling module.In the present embodiment, field effect transistor S
1with field effect transistor S
2preferably adopt the field effect transistor of F1010E model.Electrochemical capacitor C preferably adopts the electrochemical capacitor of 6800 μ F/50V.
See Fig. 3, voltage signal measurement module is mainly by MUX U1, reverse proportion operational amplifier T1, divider resistance R
1, divider resistance R
2, divider resistance R
3, divider resistance R
4, resistance R
5, resistance R _ f 1 and filter capacitor C1 composition.In MUX U1 the present embodiment, preferably adopt the MUX of CD4051 model; Oppositely proportion operational amplifier T1 preferably adopts the operational amplifier of OPA333 model.MUX U1 is provided with the first selection input end, second and selects input end, the 3rd to select input end, the first address mouth A
0, the second address mouth A
1and signal output part.The first address mouth A of MUX U1
0be the first selective stage signal input end of aforesaid voltage signal measurement module; The second address mouth A of MUX U1
1be the second selective stage signal input end of aforesaid voltage signal measurement module;
Divider resistance R
1one end be the voltage signal input end of aforesaid voltage signal measurement module; Divider resistance R
1the other end, divider resistance R
2one end and MUX U1 first select input end conllinear; Divider resistance R
2the other end, divider resistance R
3one end and MUX U1 second select input end conllinear; Divider resistance R
3the other end, divider resistance R
4one end and MUX U1 the 3rd select input end conllinear; Resistance R
5one end be electrically connected with the signal output part of MUX U1; Resistance R
5one end and the reverse inverting input conllinear of proportion operational amplifier T1 of the other end, resistance R _ f 1; Oppositely output terminal, one end of resistance R _ f 1 and one end of filter capacitor C1 of proportion operational amplifier T1 form a common junction because of conllinear, and this common junction is the voltage signal output end of aforesaid voltage signal measurement module; Oppositely positive, the divider resistance R of proportion operational amplifier T1
4the other end and the equal ground connection of the other end of filter capacitor C1.
See Fig. 4, current signal measurement module is mainly by MUX U2, reverse proportion operational amplifier T2, resistance R
6, resistance R
7, resistance R
8, resistance R
9, resistance R
10, resistance R _ f 2 and filter capacitor C2 composition.In MUX U2 the present embodiment, preferably adopt the MUX of CD4051 model; Oppositely proportion operational amplifier T2 preferably adopts the operational amplifier of OPA333 model.MUX U2 is provided with the first selection input end, second and selects input end, the 3rd to select input end, the first address mouth A
2, the second address mouth A
3and signal output part.The first address mouth A of MUX U2
2be the first selective stage signal input end of aforesaid current signal measurement module; The second address mouth A of MUX U2
3be the second selective stage signal input end of aforesaid current signal measurement module;
Resistance R
6one end be the current signal input end of aforesaid current signal measurement module; Resistance R
6the other end, resistance R
7one end and MUX U2 first select input end conllinear; Resistance R
7the other end, resistance R
8one end and MUX U2 second select input end conllinear; Resistance R
8the other end, divider resistance R
9one end and MUX U2 the 3rd select input end conllinear; Resistance R
10one end be electrically connected with the signal output part of MUX U2; Resistance R
10one end and the reverse inverting input conllinear of proportion operational amplifier T2 of the other end, resistance R _ f 2; Oppositely output terminal, one end of resistance R _ f 2 and one end of filter capacitor C2 of proportion operational amplifier T2 form a common junction because of conllinear, and this common junction is the current signal output end of aforesaid current signal measurement module; Oppositely positive, the resistance R of proportion operational amplifier T2
9the other end and the equal ground connection of the other end of filter capacitor C2.
See Fig. 5, manually gear selecting module is mainly by plucking number sign switch, resistance R
11, resistance R
12, resistance R
13and resistance R
14composition.In plucking number sign switch the present embodiment, preferably adopt the rotary encoder of LJV model.Plucking number sign switch has A, B, C, L, R wiring pin; The A wiring pin of plucking number sign switch, B wiring pin, resistance R
11one end and resistance R
12one end form a common junction because of conllinear, this common junction is the power end of aforesaid manual gear selecting module; The L wiring pin of plucking number sign switch, resistance R
11the other end and resistance R
13one end conllinear; The R wiring pin of plucking number sign switch, resistance R
12the other end and resistance R
14one end conllinear; The C wiring pin of plucking number sign switch, resistance R
13the other end and resistance R
14the other end form a common junction because of conllinear, this common junction is the selective stage signal output terminal of aforesaid manual gear selecting module.
MCU signal processing module mainly comprises the MCU integrated chip of STC12C5A16S2 model.MCU signal processing module is used for measuring gear selecting and gathers to be controlled, and after the voltage of its reception, current signal are calculated, processed, sends to higher level's watch-dog to use by its voltage and current signal output terminal.
Principle of work and the course of work of the condenser type photovoltaic cell electric current and voltage harvester of the present embodiment are summarized as follows:
The condenser type photovoltaic cell electric current and voltage harvester of the present embodiment, when use, first according to the parameter of photovoltaic cell, select corresponding voltage, electric current gear: wherein gear is selected by the plucking number sign switch manual control of manual gear selecting module, selective stage signal is sent into respectively the address mouth (A of the MUX of voltage signal measurement module and current signal measurement module after by MCU signal processing module
0, A
1and A
2, A
3).And, the now field effect transistor S in MCU signal processing module control sampling module
2for conducting state, field effect transistor S
1for cut-off state, to ensure there is no storage power on electric capacity, ensure the accuracy of measuring; Photovoltaic cell gathers voltage and electric current (now, the MCU control field effect transistor S of current time when electrochemical capacitor C is charged
1for conducting state, field effect transistor S
2for cut-off state).Voltage signal measurement module and current signal measurement module amplify the voltage of collection or current signal respectively, filtering process after, voltage, current waveform signal are sent into MCU signal processing module to be processed, obtain magnitude of voltage and the current value signal of high-precision photovoltaic cell, by MCU signal processing module, signal after treatment is uploaded to higher level's watch-dog and uses.
To sum up, the condenser type photovoltaic cell electric current and voltage harvester of the present embodiment, its than with traditional photovoltaic cell data collector, circuit structure is simple, cost is lower, easy to operate, good operating stability; Can be according to the parameter of tested photovoltaic cell, adopt stepping formula measuring method, sampling precision is higher, the sampling period is short; Can in rugged environment, use, applicability is strong.
Above embodiment is the explanation to the specific embodiment of the present invention; but not limitation of the present invention; person skilled in the relevant technique without departing from the spirit and scope of the present invention; can also make various conversion and variation and obtain the corresponding technical scheme being equal to, therefore all technical schemes that are equal to all should be included into scope of patent protection of the present invention.
Claims (7)
1. a condenser type photovoltaic cell electric current and voltage harvester, is characterized in that: comprise sampling module, voltage signal measurement module, current signal measurement module, MCU signal processing module and manual gear selecting module;
Described sampling module is provided with first signal input end, secondary signal input end, the first control signal input end, the second control signal input end, voltage signal output end and current signal output end; Voltage signal measurement module is provided with voltage signal input end, the first selective stage signal input end, the second selective stage signal input end and voltage signal output end; Current signal measurement module is provided with current signal input end, the first selective stage signal input end, the second selective stage signal input end and current signal output end; MCU signal processing module is provided with the first control end, the second control end, the first selective stage signal output terminal, the second selective stage signal output terminal, the 3rd selective stage signal output terminal, the 4th selective stage signal output terminal, voltage signal input end, current signal input end, selective stage signal input end and voltage and current signal output terminal; Manually gear selecting module is provided with signal output part and power end;
When the first signal input end of sampling module uses with secondary signal input end, correspondence is connected with positive pole and the negative electricity of tested photovoltaic cell respectively; The first control signal input end of sampling module and the second control signal input end are corresponding to be respectively electrically connected with the first control end and the second control end signal of MCU signal processing module; The voltage signal input end of voltage signal measurement module is electrically connected with the voltage signal output end signal of sampling module; The first selective stage signal input end of voltage signal measurement module and the second selective stage signal input end are corresponding to be respectively electrically connected with the first selective stage signal output terminal and the second selective stage signal output end signal of MCU signal processing module; The voltage signal input end of MCU signal processing module is electrically connected with the voltage signal output end signal of voltage signal measurement module; The current signal input end of current signal measurement module is electrically connected with the current signal output end signal of sampling module; The first selective stage signal input end of current signal measurement module and the second selective stage signal input end are corresponding to be respectively electrically connected with the 3rd selective stage signal output terminal and the 4th selective stage signal output end signal of MCU signal processing module; The current signal input end of MCU signal processing module is electrically connected with the current signal output end signal of current signal measurement module; The selective stage signal input end of MCU signal processing module is electrically connected with the selective stage signal output end signal of manual gear selecting module; Connect+5V direct supply when manually the power end of gear selecting module uses; The voltage and current signal output terminal of MCU signal processing module is electrically connected with higher level's watch-dog signal while use.
2. condenser type photovoltaic cell electric current and voltage harvester according to claim 1, is characterized in that: described sampling module comprises electrochemical capacitor C, field effect transistor S
1, field effect transistor S
2with sample rate current resistance R;
Positive level and the field effect transistor S of described electrochemical capacitor C
2drain electrode form a common junction because of conllinear, this common junction is the first signal input end of described sampling module, is also the voltage signal output end of described sampling module simultaneously; The negative pole of electrochemical capacitor C, field effect transistor S
2source electrode and field effect transistor S
1leakage level conllinear; Field effect transistor S
1drain electrode and one end of sampling resistor R form a common junction because of conllinear, this common junction is the current signal output end of described sampling module; The other end of sampling resistor R had been both the secondary signal input end of described sampling module; Field effect transistor S
2grid be the first control signal input end of sampling module; Field effect transistor S
1grid be the second control signal input end of sampling module.
3. condenser type photovoltaic cell electric current and voltage harvester according to claim 1, is characterized in that: described voltage signal measurement module comprises MUX U1, reverse proportion operational amplifier T1, divider resistance R
1, divider resistance R
2, divider resistance R
3, divider resistance R
4, resistance R
5, resistance R _ f 1 and filter capacitor C1; MUX U1 is provided with the first selection input end, second and selects input end, the 3rd to select input end, the first address mouth A
0, the second address mouth A
1and signal output part; The first address mouth A of MUX U1
0be the first selective stage signal input end of described voltage signal measurement module; The second address mouth A of MUX U1
1be the second selective stage signal input end of described voltage signal measurement module;
Divider resistance R
1one end be the voltage signal input end of described voltage signal measurement module; Divider resistance R
1the other end, divider resistance R
2one end and MUX U1 first select input end conllinear; Divider resistance R
2the other end, divider resistance R
3one end and MUX U1 second select input end conllinear; Divider resistance R
3the other end, divider resistance R
4one end and MUX U1 the 3rd select input end conllinear; Resistance R
5one end be electrically connected with the signal output part of MUX U1; Resistance R
5one end and the reverse inverting input conllinear of proportion operational amplifier T1 of the other end, resistance R _ f 1; Oppositely output terminal, one end of resistance R _ f 1 and one end of filter capacitor C1 of proportion operational amplifier T1 form a common junction because of conllinear, and this common junction is the voltage signal output end of described voltage signal measurement module; Oppositely positive, the divider resistance R of proportion operational amplifier T1
4the other end and the equal ground connection of the other end of filter capacitor C1.
4. condenser type photovoltaic cell electric current and voltage harvester according to claim 1, is characterized in that: described current signal measurement module comprises MUX U2, reverse proportion operational amplifier T2, resistance R
6, resistance R
7, resistance R
8, resistance R
9, resistance R
10, resistance R _ f 2 and filter capacitor C2; MUX U2 is provided with the first selection input end, second and selects input end, the 3rd to select input end, the first address mouth A
2, the second address mouth A
3and signal output part; The first address mouth A of MUX U2
2be the first selective stage signal input end of described current signal measurement module; The second address mouth A of MUX U2
3be the second selective stage signal input end of described current signal measurement module;
Resistance R
6one end be the current signal input end of described current signal measurement module; Resistance R
6the other end, resistance R
7one end and MUX U2 first select input end conllinear; Resistance R
7the other end, resistance R
8one end and MUX U2 second select input end conllinear; Resistance R
8the other end, divider resistance R
9one end and MUX U2 the 3rd select input end conllinear; Resistance R
10one end be electrically connected with the signal output part of MUX U2; Resistance R
10one end and the reverse inverting input conllinear of proportion operational amplifier T2 of the other end, resistance R _ f 2; Oppositely output terminal, one end of resistance R _ f 2 and one end of filter capacitor C2 of proportion operational amplifier T2 form a common junction because of conllinear, and this common junction is the current signal output end of described current signal measurement module; Oppositely positive, the resistance R of proportion operational amplifier T2
9the other end and the equal ground connection of the other end of filter capacitor C2.
5. condenser type photovoltaic cell electric current and voltage harvester according to claim 1, is characterized in that: described manual gear selecting module comprises plucking number sign switch, resistance R
11, resistance R
12, resistance R
13and resistance R
14; Described plucking number sign switch is the rotary encoder of LJV model; Plucking number sign switch has A, B, C, L, R wiring pin; The A wiring pin of plucking number sign switch, B wiring pin, resistance R
11one end and resistance R
12one end form a common junction because of conllinear, this common junction is the power end of aforesaid manual gear selecting module; The L wiring pin of plucking number sign switch, resistance R
11the other end and resistance R
13one end conllinear; The R wiring pin of plucking number sign switch, resistance R
12the other end and resistance R
14one end conllinear; The C wiring pin of plucking number sign switch, resistance R
13the other end and resistance R
14the other end form a common junction because of conllinear, this common junction is the selective stage signal output terminal of aforesaid manual gear selecting module.
6. condenser type photovoltaic cell electric current and voltage harvester according to claim 2, is characterized in that: described field effect transistor S
1with field effect transistor S
2for the field effect transistor of F1010E model; Described electrochemical capacitor C is the electrochemical capacitor of 6800 μ F/50V.
7. according to the condenser type photovoltaic cell electric current and voltage harvester described in claim 3 or 4, it is characterized in that: described MUX U1, MUX U2 is the MUX of CD4051 model; Oppositely proportion operational amplifier T1, reverse proportion operational amplifier T2 are the operational amplifier of OPA333 model.
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