CN207691759U - A kind of tension measuring circuit - Google Patents
A kind of tension measuring circuit Download PDFInfo
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- CN207691759U CN207691759U CN201820006730.6U CN201820006730U CN207691759U CN 207691759 U CN207691759 U CN 207691759U CN 201820006730 U CN201820006730 U CN 201820006730U CN 207691759 U CN207691759 U CN 207691759U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The utility model discloses a kind of tension measuring circuits, are related to the field of measuring technique of supply voltage field of measuring technique, especially photovoltaic generation, including voltage/frequency conversion module, signal isolation module, signal processing module；The input terminal access of voltage/frequency conversion module is tested voltage, the input terminal of the output end access signal isolation module of voltage/frequency conversion module, the input terminal of the output end access signal processing module of signal isolation module.The utility model measures supply voltage by using a kind of tension measuring circuit, overcome the technical problem for needing that accessory power supply, circuit are complicated, cost of manufacture is high existing for conventional voltage detection circuit, realize it is a kind of without accessory power supply, circuit structure is simple, voltage detecting circuit of low manufacture cost, improve the precision of photovoltaic generation on-Line Voltage detection, and the cost of measuring circuit is reduced, there is good economic and social benefit.The utility model can be widely applied to various voltage detecting circuits.
Description
Technical field
The utility model is related to the field of measuring technique of supply voltage field of measuring technique, especially photovoltaic generation.
Background technology
With the fast development of photovoltaic art, 1500V series photovoltaics component and conventional 1000V electrification components at this stage
It compares, has lower system cost, higher generating efficiency, while also bringing choosing for bigger to the measurement of supply voltage
War.The measurement of photovoltaic voltage at present mainly uses " linear optical coupling method " and " isolation operational amplifier method ", and both methods is both needed to
An accessory power supply for reaching circuit isolation at the same level is configured, the power supply required precision is high, making is not easy, while both circuits
Component it is more, circuit is complicated, and cost is higher.
Utility model content
In order to solve the above-mentioned technical problem, the purpose of this utility model be to provide it is a kind of without accessory power supply, circuit it is simple,
The tension measuring circuit of low manufacture cost.
Technical solution used by the utility model is：
A kind of tension measuring circuit, including voltage/frequency conversion module, signal isolation module, signal processing module；
Input voltage signal is converted to frequency signal by voltage/frequency conversion module for receiving voltage signal to be measured
It is output to signal isolation module；
The input terminal of the output end access signal processing module of signal isolation module.
Preferably, voltage/frequency conversion module includes first resistor, the first capacitance, the first bidirectional trigger diode, described
One end of first resistor is for receiving input voltage signal, the first resistor other end and the one of first bidirectional trigger diode
End connection；The other end of first bidirectional trigger diode as voltage/frequency conversion module output end, one end of the first capacitance with
First resistor is connected with the intermediate node of the first bidirectional trigger diode, the other end ground connection of the first capacitance.
Preferably, voltage/frequency conversion module include first resistor, the first capacitance, the first voltage-stabiliser tube, first it is silicon-controlled and
Tenth resistance, one end of the first resistor is for receiving input voltage signal, the first resistor other end and first voltage stabilizing
The cathode of pipe connects, and the other end of the first voltage-stabiliser tube is connect with one end of the tenth resistance, the other end conduct of the tenth resistance
For the output end of voltage/frequency conversion module；One end of first capacitance and the cathode of the first resistor and the first voltage-stabiliser tube
Intermediate node connects；The other end of first capacitance is grounded；The cathode of described first silicon-controlled anode and first voltage-stabiliser tube
Connection, the control pole of the first silicon-controlled anode are connect with the anode of first voltage-stabiliser tube, the first silicon-controlled cathode and institute
State the output end connection of voltage/frequency conversion module.
Preferably, signal isolation module includes photoisolator.
Preferably, with photoisolator signal isolation module include photoisolator, second resistance, 3rd resistor,
One end of 4th resistance, the 3rd resistor is connect with the output end of voltage/frequency conversion module, another termination of 3rd resistor
Ground；One end of the second resistance is connect with the output end of voltage/frequency conversion module, the second resistance other end and the 4th resistance
One end connection, the 4th resistance the other end ground connection；1st pin of photoisolator connects the defeated of voltage/frequency conversion module
Outlet, the intermediate node of the 2nd pin access second resistance and the 4th resistance, output end of the 3rd pin as signal isolation module,
The 4th pin of photoisolator connection access supply voltage.
Preferably, the signal isolation module with photoisolator further includes the 5th resistance and the second capacitance, the 5th resistance
One end and the 3rd pin of photoisolator connect, the other end of the 5th resistance ground connection；One end of second capacitance and Phototube Coupling
3rd pin of device connects, the other end ground connection of the second capacitance
Preferably, the signal isolation module of tension measuring circuit includes transformer.
Preferably, the signal isolation module with transformer of tension measuring circuit includes the first transformer, the one or two pole
Pipe, the 20th resistance, the 21st resistance, the 22nd resistance, the 23rd resistance and the 24th resistance.First diode
Cathode connection voltage/frequency conversion module output end, the plus earth of the first diode, the 20th resistance one end connection
One end of the cathode of first diode, the other end ground connection of the 20th resistance, the 21st resistance connects the negative of the first diode
The other end of pole, the 21st resistance is connect with one end of the input terminal of the first transformer, the first transformer inputs it is another
End ground connection, one end of the output end of the first transformer are connect with one end of the 22nd resistance, the output end of the first transformer
The other end is grounded, the other end ground connection of the 22nd resistance, one end of the 23rd resistance and the output end of the first transformer
One end connects, and the other end of the 23rd resistance is connect with one end of the 24th resistance, another termination of the 24th resistance
Output end of the intermediate node of ground, the 23rd resistance and the 24th resistance as signal isolation module.
Preferably, the signal processing module of tension measuring circuit further includes thermistor, one end of thermistor and signal
Processing module is connected, other end ground connection.
The utility model has the beneficial effects that：Tension measuring circuit is turned high-voltage signal by voltage/frequency conversion module
Frequency signal is changed into, by signal isolation module, by voltage/frequency modulus of conversion high-voltage signal in the block and signal processing module
Isolation, the voltage value of tested voltage is calculated by signal processing module using frequency as parameter, overcomes conventional voltage detection electricity
Accessory power supply, the technical problem that circuit is complicated, cost of manufacture is high is needed to realize one kind without accessory power supply, electricity existing for road
Line structure is simple, the tension measuring circuit of low manufacture cost, improves the precision of photovoltaic generation on-Line Voltage detection, and reduces
The cost of measuring circuit has good economic and social benefit.
The utility model can be widely applied to various voltage detecting circuits.
Description of the drawings
Specific embodiment of the present utility model is described further below in conjunction with the accompanying drawings：
Fig. 1 is a kind of circuit diagram of tension measuring circuit in embodiment；
Fig. 2 is the circuit diagram of tension measuring circuit in another embodiment；
Fig. 3 is the circuit diagram of tension measuring circuit voltage/frequency conversion module in another embodiment.
Specific implementation mode
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.
A kind of tension measuring circuit includes voltage/frequency conversion module, signal isolation module, signal processing module；Voltage/
The input terminal access of frequency translation module is tested voltage, the output end access signal isolation module of voltage/frequency conversion module
The output end of input terminal, signal isolation module accesses signal processing module input terminal.
In one embodiment, as shown in Figure 1, voltage/frequency conversion module, including first resistor R1, the first capacitance C1,
One end of first bidirectional trigger diode DB1, first resistor R1 are for receiving input voltage signal (100~1500V), the other end
It is connect with one end of the first bidirectional trigger diode DB1, the other end of the first bidirectional trigger diode DB1 is as voltage/frequency
The output end of conversion module；The middle node of one end and first resistor R1 and the first bidirectional trigger diode DB1 of the first capacitance C1
Point connection, the other end ground connection of the first capacitance C1, the effect of the module are that the voltage signal of tested power supply is converted to frequency letter
Number it is output to signal isolation module.
Signal isolation module includes photoisolator U1 (PC817), second resistance R2,3rd resistor R3, the 4th resistance R4,
One end of 3rd resistor R3 is connect with the output end of voltage/frequency conversion module, the other end ground connection of 3rd resistor R3；Second electricity
One end of resistance R2 is connect with the intermediate node of the first bidirectional trigger diode DB1 and 3rd resistor R3, the second resistance R2 other ends
It is connect with one end of the 4th resistance R4, the other end ground connection of the 4th resistance R4；The 1st pin connection voltage of photoisolator U1/
The output end of frequency translation module, the 2nd pin access the intermediate node of second resistance R2 and the 4th resistance R4, the output of the 3rd pin
The I/O mouths of frequency signal F-out to signal processing module MCU, the 4th pins of photoisolator U1, micro-control unit MCU, display
Module accesses supply voltage LV+.
Signal isolation module is isolated by the high-voltage signal of tested voltage with program processing module, plays the work of decompression and protection
With the frequency of the output voltage of signal isolation module is identical as the frequency of the output voltage of voltage/frequency conversion module.
The output end of signal isolation module connects a Shaping Module；Shaping Module includes the 5th resistance R5 and the second capacitance
C2, one end of the 5th resistance R5 are connect with the 3rd pin of photoisolator U1, the other end ground connection of the 5th resistance；Second capacitance
One end of C2 is connect with the 3rd pin of photoisolator U1, the other end ground connection (LV-) of the second capacitance C2；
The amendment that the output voltage by signal isolation module of Shaping Module carries out waveform is adapted to load.
Micro-control unit MCU can be used in signal processing module, and signal processing module further includes thermistor R6 (NTC temperature-sensitives
Resistance), thermistor R6 can be that micro-control unit MCU is used as temperature-compensating, effectively improve measurement accuracy.
The output end of micro-control unit MCU accesses display module, shows measurement result.
Obvious, 51 microcontrollers, arm processor or FPGA processor can be used in signal processing module.
The present embodiment specific work process is as follows：
Voltage is tested when beginning to the first capacitance C1 chargings, the voltage at the first both ends capacitance C1 increases at any time, the first electricity
When the voltage at the both ends appearance C1 is increased to the conducting voltage of the first bidirectional trigger diode DB1, the first bidirectional trigger diode DB1
Conducting, the series connection bleeder circuit conducting of second resistance R2 and the 4th resistance R4 compositions, the voltage at the both ends second resistance R2 increase, with
The photoisolator U1 conductings of the isolation circuit of second resistance R2 parallel connections；Start to discharge after first capacitance C1 charging completes, first
The voltage at the both ends capacitance C1 reduces, when voltage the leading less than the first both ends bidirectional trigger diode DB1 at the first both ends capacitance C1
When the pressure that is powered, the first bidirectional trigger diode DB1 cut-off, the voltage at the both ends second resistance R2 is zero, the photoelectricity of isolation circuit every
It turns off from device U1 dead electricity, after the completion of the first capacitance C1 electric discharges, and starts to charge up, therefore, the first bidirectional trigger diode DB1 periods
Property ON/OFF.Tested voltage is higher, and it is shorter that the first capacitance C1 charging reached for the first bidirectional trigger diode DB1 both ends times,
The frequency that first bidirectional trigger diode DB1 is triggered is higher, the week that the both ends photoisolator U1 export in circuit linearity insulating circuit
The frequency of phase property voltage is higher, therefore the frequency of tested supply voltage and isolation circuit output voltage is linear relationship, letter
Number processing module calculates tested supply voltage by measuring the frequency of the periodic voltage of isolation circuit output, and passes through display
Module is shown.
In another embodiment, as shown in Fig. 2, signal isolation module includes the first transformer T1, the first diode
D1, the 20th resistance R20, the 21st resistance R21, the 22nd resistance R22, the electricity of the 23rd resistance R23 and the 24th
Hinder R24.The output end of the cathode connection voltage/frequency conversion module of first diode D1, the plus earth of the first diode D1,
One end of 20th resistance R20 connects the cathode of the first diode D1, and the other end of the 20th resistance R20 is grounded, and the 21st
One end of resistance R21 connects the cathode of the first diode D1, and the other end is connect with one end of the input terminal of the first transformer T1, the
The other end of one transformer T1 input terminals is grounded, one end of the output end of the first transformer T1 and the one of the 22nd resistance R22
End connection, the other end ground connection of the output end of the first transformer T1, the other end ground connection of the 22nd resistance R22, the 23rd
One end of resistance R23 is connect with one end of the output end of the first transformer T1, the other end and the 20th of the 23rd resistance R23
Four resistance R24 connections, the other end ground connection of the 24th resistance R24, the 23rd resistance R23 and the 24th resistance R24's
Output end of the intermediate node as signal isolation module.
Use transformer T1 that the high-voltage signal that voltage/frequency conversion module exports is converted into low pressure letter in the present embodiment
Number, the first diode plays the role of afterflow protection.
In another embodiment, as shown in figures 1 and 3, two pole of the in the block first two-way triggering of voltage/frequency modulus of conversion
Pipe DB1 can be used the circuit that voltage-stabiliser tube D3, silicon-controlled Q3, the tenth resistance R10 are formed and substitute, the cathode connection of voltage-stabiliser tube D3
The intermediate node of first resistor R1 and the first capacitance C1, one end of the tenth resistance R10 of anode connection of voltage-stabiliser tube, the tenth resistance
Cathode of the other end of R10 as the anode and voltage-stabiliser tube D3 of the output end V1out, silicon-controlled Q3 of voltage/frequency conversion module
Connection, the control pole of silicon-controlled Q3 are connect with the anode of voltage-stabiliser tube D3, and the cathode of silicon-controlled Q3 is as voltage/frequency modulus of conversion
One output end V1out of block, another output end V2out ground connection of voltage/frequency conversion module.
It is tested power supply in the present embodiment to the first capacitance C1 chargings, the voltage at the both ends voltage-stabiliser tube D3 increases, and works as voltage-stabiliser tube
When the voltage and current at the both ends D3 reaches the turn-on condition of silicon-controlled Q3, the conducting of silicon-controlled Q3, when the first capacitance C1 discharges, surely
The voltage at the both ends pressure pipe D3 reduces, and silicon-controlled Q3 cut-offs, therefore, the output end V1out of frequency translation module exports the period outward
Property pulse signal, the voltage for being tested voltage is higher, and the frequency of the pulse signal of the output end of frequency translation module output is higher,
The voltage signal for realizing tested power supply is converted to the function that frequency signal is output to signal isolation module.
It is to be illustrated to the preferable implementation of the utility model, but the invention is not limited to the reality above
Example is applied, those skilled in the art can also make various equivalent variations without departing from the spirit of the present invention
Or replace, these equivalent deformations or replacement are all contained in the application claim limited range.
Claims (9)
1. a kind of tension measuring circuit, which is characterized in that including voltage/frequency conversion module, signal isolation module, signal processing
Module；
Input voltage signal is converted to frequency signal by the voltage/frequency conversion module for receiving voltage signal to be measured
It is output to the signal isolation module；
The output end of the signal isolation module accesses the input terminal of the signal processing module.
2. tension measuring circuit according to claim 1, which is characterized in that the voltage/frequency conversion module includes the
One resistance, the first capacitance, the first bidirectional trigger diode, one end of the first resistor are used to receive input voltage signal, the
The one resistance other end is connect with one end of first bidirectional trigger diode；The other end conduct of first bidirectional trigger diode
Voltage/frequency conversion module output end, one end and the first resistor and the first two-way triggering two of first capacitance
The intermediate node of pole pipe connects, the other end ground connection of first capacitance.
3. tension measuring circuit according to claim 1, which is characterized in that the voltage/frequency conversion module includes the
One end of one resistance, the first capacitance, the first voltage-stabiliser tube, the first silicon-controlled and the tenth resistance, the first resistor is defeated for receiving
Enter voltage signal, the first resistor other end is connect with the cathode of first voltage-stabiliser tube, the other end of first voltage-stabiliser tube with
One end of tenth resistance connects, and the other end of the tenth resistance is as the output end for voltage/frequency conversion module；Described
One end of one capacitance is connect with the intermediate node of the first resistor and the cathode of first voltage-stabiliser tube；First capacitance it is another
End ground connection；Described first silicon-controlled anode is connect with the cathode of first voltage-stabiliser tube, the first silicon-controlled control pole and institute
The anode connection of the first voltage-stabiliser tube is stated, the first silicon-controlled cathode is connect with the output end of the voltage/frequency conversion module.
4. tension measuring circuit according to any one of claims 1 to 3, which is characterized in that the signal isolation module packet
Include photoisolator.
5. tension measuring circuit according to claim 4, it is characterised in that the signal isolation module with photoisolator
Including photoisolator, second resistance, 3rd resistor, the 4th resistance, one end and the voltage/frequency modulus of conversion of the 3rd resistor
The output end of block connects, the other end ground connection of 3rd resistor；One end of the second resistance is defeated with voltage/frequency conversion module
Outlet connects, and the second resistance other end is connect with one end of the 4th resistance, the other end ground connection of the 4th resistance；The photoelectricity
The output end of the 1st pin connection voltage/frequency conversion module of isolator, the 2nd pin access second resistance and the 4th resistance
Intermediate node, output end of the 3rd pin as signal isolation module, the 4th pin of photoisolator connection access supply voltage.
6. tension measuring circuit according to claim 5, it is characterised in that the signal isolation module with photoisolator
Further include the 5th resistance and the second capacitance, one end of the 5th resistance is connect with the 3rd pin of the photoisolator, and the 5th
The other end of resistance is grounded；One end of second capacitance is connect with the 3rd pin of the photoisolator, the second capacitance it is another
One end is grounded.
7. tension measuring circuit according to any one of claims 1 to 3, which is characterized in that the signal isolation module packet
Include transformer.
8. tension measuring circuit according to claim 7, it is characterised in that include with the signal isolation module of transformer
First transformer, the first diode, the 20th resistance, the 21st resistance, the 22nd resistance, the 23rd resistance and second
14 resistance；The output end of the cathode connection voltage/frequency conversion module of first diode, the anode of the first diode connect
Ground, one end of the 20th resistance connect the cathode of first diode, the other end ground connection of the 20th resistance, and described the
One end of 21 resistance connects the cathode of first diode, the other end of the 21st resistance and first transformer
Input terminal one end connection, first transformer inputs the other end ground connection, one end of the output end of the first transformer
Connect with one end of the 22nd resistance, the other end of the output end of the first transformer ground connection, the 22nd resistance it is another
One end is grounded, and one end of the 23rd resistance is connect with one end of the output end of first transformer, the 23rd electricity
The other end of resistance is connect with one end of the 24th resistance, the other end ground connection of the 24th resistance, the 23rd resistance
Output end with the intermediate node of the 24th resistance as signal isolation module.
9. according to the tension measuring circuit described in claim 1,2,3,5 or 8, which is characterized in that the signal processing module is also
Including thermistor, one end of the thermistor is connected with signal processing module, other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820006730.6U CN207691759U (en) | 2018-01-03 | 2018-01-03 | A kind of tension measuring circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820006730.6U CN207691759U (en) | 2018-01-03 | 2018-01-03 | A kind of tension measuring circuit |
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| Publication Number | Publication Date |
|---|---|
| CN207691759U true CN207691759U (en) | 2018-08-03 |
Family
ID=62990676
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820006730.6U Active CN207691759U (en) | 2018-01-03 | 2018-01-03 | A kind of tension measuring circuit |
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| Country | Link |
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| CN (1) | CN207691759U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108075730A (en) * | 2018-01-03 | 2018-05-25 | 深圳市华杰电气技术有限公司 | A kind of tension measuring circuit |
| CN112305300A (en) * | 2019-07-31 | 2021-02-02 | 株洲中车时代半导体有限公司 | Voltage detection sensor and system |
| CN113267669A (en) * | 2021-06-04 | 2021-08-17 | 上海冉能自动化科技有限公司 | Voltage measuring device and method |
-
2018
- 2018-01-03 CN CN201820006730.6U patent/CN207691759U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108075730A (en) * | 2018-01-03 | 2018-05-25 | 深圳市华杰电气技术有限公司 | A kind of tension measuring circuit |
| CN112305300A (en) * | 2019-07-31 | 2021-02-02 | 株洲中车时代半导体有限公司 | Voltage detection sensor and system |
| CN113267669A (en) * | 2021-06-04 | 2021-08-17 | 上海冉能自动化科技有限公司 | Voltage measuring device and method |
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