CN109581043A - A kind of high direct voltage signal acquisition circuit - Google Patents
A kind of high direct voltage signal acquisition circuit Download PDFInfo
- Publication number
- CN109581043A CN109581043A CN201811591076.0A CN201811591076A CN109581043A CN 109581043 A CN109581043 A CN 109581043A CN 201811591076 A CN201811591076 A CN 201811591076A CN 109581043 A CN109581043 A CN 109581043A
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- operational amplifier
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- direct voltage
- voltage signal
- high direct
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/2503—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques for measuring voltage only, e.g. digital volt meters (DVM's)
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/144—Measuring arrangements for voltage not covered by other subgroups of G01R15/14
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
The present invention provides a kind of high direct voltage signal acquisition circuit, the signal acquisition circuit is arranged between high direct voltage signal and single-chip microcontroller, for acquiring high direct voltage signal and collected high direct voltage signal being transmitted to single-chip microcontroller, the signal acquisition circuit includes bleeder circuit and signal amplification circuit, high direct voltage signal is successively connected after bleeder circuit and signal amplification circuit with single-chip microcontroller, the signal amplification circuit includes isolation operational amplifier N1, single channel operational amplifier U1, resistance R1~R5 and filter capacitor C1~C4, the port GND1 of isolation operational amplifier N1 is that non-formula altogether is connect with the port GND2 between the two, the configuration of the present invention is simple is practical, it can not only realize high-low pressure electrical isolation, and it is able to detect the DC high-voltage within 2000V, reliable operation, it is low in cost.
Description
Technical field
The invention belongs to vehicle bus Signal Collection Technology fields, and in particular to a kind of high direct voltage signal acquisition circuit.
Background technique
With the raising to environmental protection and power conservation requirement, new energy vehicle has obtained rapid promotion and popularization, institute's gas-distributing motor
Required DC bus-bar voltage, range 300V~700V are differed.And the high voltage electric equipment on vehicle is more and complicated, in order to control
Power control etc. is protected or detected or carried out to system, then needs to be acquired DC bus-bar voltage.For direct current
There are mainly two types of the detection methods of high-voltage electricity: first is that being detected using Hall sensor, it not only can be carried out electrical isolation, and
And accuracy is high, the linearity is good, but cost is relatively high, volume is relatively large.Second is that by resistance Multilevel partial-pressure, filtering, most
Big disadvantage be forceful electric power and light current altogether, do not carry out electrical isolation, because class of insulation deficiency cause vehicle safety alarm, influence just
Often work.
In order to solve the above technical problems, those skilled in the art devise a variety of high-voltage detecting circuits, such as patent No.
A kind of direct-current high voltage detection circuit of the disclosure of the invention of CN201810268432.9.After electric resistance partial pressure, transported into high input impedance
Amplifier CA3140 is calculated, using linear optical coupling isolation device HCRN201, finally by differential filtering and voltage follower circuit structure
It is realized at signal conditioning module, hardware circuit is complex；A kind of tool of the disclosure of the invention of Patent No. CN207923996U
The high-voltage acquisition module of the battery management system of flexible connection structure is mainly described and is carried out between master-slave circuit plate with conducting wire
The structure of flexible connection solves and is fixed on very much high-voltage acquisition module bring stress problem greatly because shunting meter；The patent No.
The invention of CN304805472S and CN304849945S individually discloses a kind of high-voltage acquisition circuit board and high-voltage acquisition controller
Appearance patent；A kind of high-voltage acquisition circuit of the disclosure of the invention of patent No. CN206975095U, uses 6 resistance to be divided
Pressure, intermediate series relay is as switch, but this circuit can not carry out the isolation of forceful electric power and light current, be not directly applicable vehicle
On.
Summary of the invention
The object of the present invention is to provide a kind of high direct voltage signal acquisition circuit, the present invention can not only realize height piezoelectricity
Air bound from, and be able to detect the DC high-voltage within 2000V, it is reliable operation, low in cost.
In order to achieve the above object, the technical scheme adopted by the invention is that: a kind of high direct voltage signal acquisition circuit, should
Signal acquisition circuit be arranged between high direct voltage signal and single-chip microcontroller, for acquire high direct voltage signal and will it is collected directly
Stream high-voltage signal is transmitted to single-chip microcontroller, which includes bleeder circuit and signal amplification circuit, high direct voltage signal
Successively it is connected after bleeder circuit and signal amplification circuit with single-chip microcontroller, the signal amplification circuit includes isolation operational amplifier
N1, single channel operational amplifier U1, resistance R1~R5 and filter capacitor C1~C4, the output head anode of bleeder circuit with operation is isolated
The port Vin+ of amplifier N1 is connected, and the negative pole of output end of bleeder circuit is connected with the port GND1 that operational amplifier N1 is isolated,
The port Vin+ of isolation operational amplifier N1 is connected with the port Vin- by filter capacitor C2, and the Vin- of operational amplifier N1 is isolated
Port common ground connection after being connected with the port GND1, be isolated the port VDD1 of operational amplifier N1 respectively with power supply A and filter capacitor
One end of C1 is connected, the other end ground connection of filter capacitor C1, be isolated the port VDD2 of operational amplifier N1 respectively with power supply B and filter
One end of wave capacitor C3 is connected, and the other end of filter capacitor C3 is connected with the port GND2 that operational amplifier N1 is isolated, isolation fortune
Calculate amplifier N1 the port Vout+ be connected with one end of resistance R1, the other end of resistance R1 respectively with single channel operational amplifier U1
Non-inverting input terminal be connected with one end of resistance R2, the other end of resistance R2 be isolated operational amplifier N1 the port GND2 be connected
After be grounded, isolation operational amplifier N1 the port Vout- be connected through resistance R3 with the inverting input terminal of single channel operational amplifier U1,
The inverting input terminal of single channel operational amplifier U1 is connected through resistance R4 with the output end of single channel operational amplifier U1, and single channel operation is put
The output end of big device U1 is connected with one end of resistance R5, the other end of resistance R5 respectively with single-chip microcontroller 4 and filter capacitor C4 one
End is connected, and the other end ground connection of filter capacitor C4, the cathode power supply end of single channel operational amplifier U1 is connected with supply voltage VCC+,
With supply voltage VCC- and the port the GND2 phase of operational amplifier N1 is isolated respectively in the negative electricity source of single channel operational amplifier U1
Even.
Further, the power supply A and power supply B is+5V power supply, the port GND1 of the isolation operational amplifier N1
It is between the two that non-formula altogether is connect with the port GND2.
Further, the output voltage of the bleeder circuit is 0~300MV.
Further, the model TLP7920 of the isolation operational amplifier N1.
Further, the model LM324 or OP07 of the single channel operational amplifier U1.
Compared with prior art, the beneficial effects of the present invention are: circuit of the present invention is simple and practical, height can not only be realized
Voltage electrical isolation, and is able to detect the DC high-voltage within 2000V, reliable operation, low in cost.
Detailed description of the invention
Fig. 1 is the principle of the present invention block diagram；
Marked in the figure: 1, high direct voltage signal, 2, bleeder circuit, 3, signal amplification circuit, 4, single-chip microcontroller.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached in the present invention
Figure, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is the present invention
A part of the embodiment, instead of all the embodiments, based on the embodiments of the present invention, those of ordinary skill in the art are not having
Every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.
As shown in Figure 1, a kind of high direct voltage signal acquisition circuit, which is arranged in high direct voltage signal 1
It is single for acquiring high direct voltage signal 1 and collected high direct voltage signal 1 being transmitted to single-chip microcontroller 4 between single-chip microcontroller 4
Piece machine 4 handles the signal received, which includes bleeder circuit 2 and signal amplification circuit 3, bleeder circuit
2 be resistor voltage divider circuit, and input voltage can finally obtain the output of 0~300MV within 2000V after Multilevel partial-pressure
Signal, to those skilled in the art, the form of resistor voltage divider circuit are more, do not do excessive description, direct current here
High-voltage signal 1 is successively connected after bleeder circuit 2 and signal amplification circuit 3 with single-chip microcontroller 4, and the signal amplification circuit 3 includes
Operational amplifier N1, single channel operational amplifier U1, resistance R1~R5 and filter capacitor C1~C4 is isolated, operational amplifier N1 is isolated
Model TLP7920, the output head anode of bleeder circuit 2 be isolated operational amplifier N1 the port Vin+ be connected, partial pressure electricity
The negative pole of output end on road 2 be isolated operational amplifier N1 the port GND1 be connected, be isolated operational amplifier N1 the port Vin+ with
The port Vin- is connected by filter capacitor C2, and the port Vin- of isolation operational amplifier N1 connects jointly after being connected with the port GND1
The port VDD1 on ground, isolation operational amplifier N1 is connected with one end of power supply A and filter capacitor C1 respectively, and filter capacitor C1's is another
The port VDD2 of one end ground connection, isolation operational amplifier N1 is connected with one end of power supply B and filter capacitor C3 respectively, filter capacitor
The other end of C3 is connected with the port GND2 that operational amplifier N1 is isolated, and the port Vout+ and the resistance of operational amplifier N1 is isolated
One end of R1 is connected, the other end of resistance R1 one end phase with the non-inverting input terminal of single channel operational amplifier U1 and resistance R2 respectively
Even, the other end of resistance R2 is grounded after being connected with the port GND2 that operational amplifier N1 is isolated, isolation operational amplifier N1's
The port Vout- is connected through resistance R3 with the inverting input terminal of single channel operational amplifier U1, and the end Vout+ of operational amplifier N1 is isolated
Voltage follower can be increased at mouth and the port Vout-, the inverting input terminal of single channel operational amplifier U1 is through resistance R4 and single channel
The output end of operational amplifier U1 is connected, and single channel operational amplifier U1 can be single supply power supply, such as LM324；It is also possible to double
Power supply power supply, such as OP07；The output end of single channel operational amplifier U1 is connected with one end of resistance R5, the other end difference of resistance R5
It is connected with one end of single-chip microcontroller 4 and filter capacitor C4, the other end ground connection of filter capacitor C4, the anode of single channel operational amplifier U1
Power end is connected with supply voltage VCC+, the negative electricity source of single channel operational amplifier U1 respectively with supply voltage VCC- and be isolated
The port GND2 of operational amplifier N1 is connected.
This programme is advanced optimized, the power supply A and power supply B are+5V power supply, the isolation operational amplifier N1's
The port GND1 is that non-formula altogether is connect with the port GND2 between the two, and power supply A and power supply B are mutually isolated, realize height voltage electrical every
From improving stability of the invention.
This programme is advanced optimized, filter capacitor C1~C4 can be in parallel using multiple polar capacitors and polarity free capacitor,
The quantity of capacitor parallel connection is not limited to shown in Fig. 1.
Circuit of the present invention is simple and practical, can not only realize high-low pressure electrical isolation, and is able to detect straight within 2000V
High-voltage electricity is flowed, it is reliable operation, low in cost.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (5)
1. a kind of high direct voltage signal acquisition circuit, which is arranged in high direct voltage signal (1) and single-chip microcontroller (4)
Between, for acquiring high direct voltage signal (1) and collected high direct voltage signal (1) being transmitted to single-chip microcontroller (4), feature
Be: the signal acquisition circuit includes bleeder circuit (2) and signal amplification circuit (3), and high direct voltage signal (1) is successively through dividing
Circuit (2) and signal amplification circuit (3) are connected with single-chip microcontroller (4) afterwards, and the signal amplification circuit (3) includes isolation operation amplifier
Device N1, single channel operational amplifier U1, resistance R1~R5 and filter capacitor C1~C4, the output head anode of bleeder circuit (2) with every
The port Vin+ from operational amplifier N1 is connected, the negative pole of output end of bleeder circuit (2) and the GND1 that operational amplifier N1 is isolated
Port is connected, and the port Vin+ of isolation operational amplifier N1 is connected with the port Vin- by filter capacitor C2, and operation amplifier is isolated
The port Vin- of device N1 common ground connection after being connected with the port GND1, be isolated the port VDD1 of operational amplifier N1 respectively with power supply A
It is connected with one end of filter capacitor C1, the other end ground connection of filter capacitor C1, the port the VDD2 difference of isolation operational amplifier N1
It is connected with one end of power supply B and filter capacitor C3, the other end of filter capacitor C3 and the port GND2 that operational amplifier N1 is isolated
It is connected, the port Vout+ of isolation operational amplifier N1 is connected with one end of resistance R1, and the other end of resistance R1 is transported with single channel respectively
Calculate amplifier U1 non-inverting input terminal be connected with one end of resistance R2, the other end of resistance R2 be isolated operational amplifier N1's
The port GND2 is grounded after being connected, and the port Vout- of operational amplifier N1 is isolated through the anti-of resistance R3 and single channel operational amplifier U1
Phase input terminal is connected, output end phase of the inverting input terminal of single channel operational amplifier U1 through resistance R4 with single channel operational amplifier U1
Even, the output end of single channel operational amplifier U1 is connected with one end of resistance R5, the other end of resistance R5 respectively with single-chip microcontroller (4) and
One end of filter capacitor C4 is connected, the other end ground connection of filter capacitor C4, the cathode power supply end of single channel operational amplifier U1 and confession
Piezoelectric voltage VCC+ is connected, the negative electricity source of single channel operational amplifier U1 respectively with supply voltage VCC- and operational amplifier is isolated
The port GND2 of N1 is connected.
2. a kind of high direct voltage signal acquisition circuit according to claim 1, it is characterised in that: the power supply A and electricity
Source B is+5V power supply, and the port GND1 of the isolation operational amplifier N1 is that non-formula altogether is connect with the port GND2 between the two.
3. a kind of high direct voltage signal acquisition circuit according to claim 1, it is characterised in that: the bleeder circuit (2)
Output voltage be 0~300MV.
4. a kind of high direct voltage signal acquisition circuit according to claim 1, it is characterised in that: the isolation operation amplifier
The model TLP7920 of device N1.
5. a kind of high direct voltage signal acquisition circuit according to claim 1, it is characterised in that: the single channel operation amplifier
The model LM324 or OP07 of device U1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811591076.0A CN109581043A (en) | 2018-12-25 | 2018-12-25 | A kind of high direct voltage signal acquisition circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811591076.0A CN109581043A (en) | 2018-12-25 | 2018-12-25 | A kind of high direct voltage signal acquisition circuit |
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| Publication Number | Publication Date |
|---|---|
| CN109581043A true CN109581043A (en) | 2019-04-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811591076.0A Pending CN109581043A (en) | 2018-12-25 | 2018-12-25 | A kind of high direct voltage signal acquisition circuit |
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| CN (1) | CN109581043A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110763909A (en) * | 2019-11-11 | 2020-02-07 | 绵阳市维博电子有限责任公司 | Digital display DC meter and voltage sampling circuit thereof |
| CN112986665A (en) * | 2021-03-30 | 2021-06-18 | 中国南方电网有限责任公司超高压输电公司梧州局 | Secondary ground grid voltage monitoring device and method |
| CN113156185A (en) * | 2021-03-30 | 2021-07-23 | 中国南方电网有限责任公司超高压输电公司梧州局 | DC bus voltage monitoring system |
| CN113156185B (en) * | 2021-03-30 | 2024-09-27 | 中国南方电网有限责任公司超高压输电公司梧州局 | DC bus voltage monitoring system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202330520U (en) * | 2011-11-02 | 2012-07-11 | 广东美的电器股份有限公司 | High-voltage isolation sampling circuit |
| CN202583316U (en) * | 2012-06-01 | 2012-12-05 | 惠州市亿能电子有限公司 | Circuit for collecting positive and negative current by single power supply |
| CN202794293U (en) * | 2012-07-04 | 2013-03-13 | 北京精密机电控制设备研究所 | Busbar voltagebar voltage isolating and sampling circuit |
| CN105606883A (en) * | 2015-12-21 | 2016-05-25 | 南宁学院 | Weak current detection system based on FFT filtering |
| CN207976519U (en) * | 2018-03-29 | 2018-10-16 | 福建工程学院 | A kind of direct-current high voltage detection circuit |
-
2018
- 2018-12-25 CN CN201811591076.0A patent/CN109581043A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202330520U (en) * | 2011-11-02 | 2012-07-11 | 广东美的电器股份有限公司 | High-voltage isolation sampling circuit |
| CN202583316U (en) * | 2012-06-01 | 2012-12-05 | 惠州市亿能电子有限公司 | Circuit for collecting positive and negative current by single power supply |
| CN202794293U (en) * | 2012-07-04 | 2013-03-13 | 北京精密机电控制设备研究所 | Busbar voltagebar voltage isolating and sampling circuit |
| CN105606883A (en) * | 2015-12-21 | 2016-05-25 | 南宁学院 | Weak current detection system based on FFT filtering |
| CN207976519U (en) * | 2018-03-29 | 2018-10-16 | 福建工程学院 | A kind of direct-current high voltage detection circuit |
Non-Patent Citations (4)
| Title |
|---|
| 张英全 等: "《数字电子技术》", 31 January 2001 * |
| 房国志: "《模拟电子技术基础》", 31 July 2007 * |
| 杨卫军: "《单片机应用设计》", 31 August 2016 * |
| 王加祥 等: "《实用电路分析及应用》", 31 May 2015 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110763909A (en) * | 2019-11-11 | 2020-02-07 | 绵阳市维博电子有限责任公司 | Digital display DC meter and voltage sampling circuit thereof |
| CN112986665A (en) * | 2021-03-30 | 2021-06-18 | 中国南方电网有限责任公司超高压输电公司梧州局 | Secondary ground grid voltage monitoring device and method |
| CN113156185A (en) * | 2021-03-30 | 2021-07-23 | 中国南方电网有限责任公司超高压输电公司梧州局 | DC bus voltage monitoring system |
| CN112986665B (en) * | 2021-03-30 | 2024-06-04 | 中国南方电网有限责任公司超高压输电公司梧州局 | Secondary grounding grid voltage monitoring device and method |
| CN113156185B (en) * | 2021-03-30 | 2024-09-27 | 中国南方电网有限责任公司超高压输电公司梧州局 | DC bus voltage monitoring system |
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Application publication date: 20190405 |