CN109541277A - Full isolated DC voltage sample system and its working method - Google Patents
Full isolated DC voltage sample system and its working method Download PDFInfo
- Publication number
- CN109541277A CN109541277A CN201910119226.6A CN201910119226A CN109541277A CN 109541277 A CN109541277 A CN 109541277A CN 201910119226 A CN201910119226 A CN 201910119226A CN 109541277 A CN109541277 A CN 109541277A
- Authority
- CN
- China
- Prior art keywords
- voltage
- signal
- circuit
- resistance
- input
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Amplifiers (AREA)
Abstract
The present invention relates to voltage isolation detection technical field, specially a kind of full isolated DC voltage sample system and its working method, wherein full isolated DC voltage sample system includes: input signal isolation module；The input signal isolation module is suitable for exporting after the voltage signal of input voltage is isolated；The input signal isolation module includes: voltage sampling circuit, level-one filter circuit, signal conditioning circuit, secondary filter circuit and signal conversion isolation circuit.The isolation output of voltage signal is realized by input signal isolation module.
Description
Technical field
The present invention relates to voltage isolation detection technical field, specially a kind of full isolated DC voltage sample system and its work
Make method.
Background technique
With the rapid development of power electronic technique, the operation of large scale equipment carries out directly sometimes for DC power supply is used
Power supply or as backup power source, and the output voltage amplitude of DC power supply is larger from tens volts to several kilovolts, is to realize to output
The effective monitoring of voltage is needed voltage value real-time Transmission to main controller.To guarantee that voltage value is undistorted, and prime high voltage is believed
The operation of rear class low-voltage circuit number is not influenced, traditional mode uses electric resistance partial pressure to sample as shown in Figure 1, by high-voltage dc signal
Proportional low-voltage dc signal is converted, linear optical coupling is reused and realizes that main controller with low-voltage dc signal is isolated, to realize
Monitoring to DC high voltage；Or high-voltage signal is acquired using voltage hall sensor, because of Hall element fast response time,
Quick and precisely precision is high for which, as long as sensor fault-free, can be monitored in real time, and will not influence the operation of other circuits.
Electric resistance partial pressure traditional at present, which is sampled, is converted into low pressure for high direct voltage, then carries out the mode of light-coupled isolation, samples
Precision is higher, but complete electrical isolation is not implemented, and such as power supply part, causes equipment anti-interference ability weaker, Bu Nengshi
Answer demand of the industry to stabilization of equipment performance and reliability；And in such a way that voltage hall sensor realizes high direct voltage sampling,
Voltage measurement accuracy is very high, and also quickly, but cost is high, and needs dual power supply for response speed, and cost can not be ignored.
Based on above-mentioned technical problem, need to design a kind of new full isolated DC voltage sample system and its working method.
Summary of the invention
The object of the present invention is to provide a kind of full isolated DC voltage sample system and its working methods.
In order to solve the above-mentioned technical problems, the present invention provides a kind of full isolated DC voltage sample systems, comprising:
Input signal isolation module；
The input signal isolation module is suitable for exporting after the voltage signal of input voltage is isolated；
The input signal isolation module includes: voltage sampling circuit, level-one filter circuit, signal conditioning circuit, secondary filter
Circuit and signal convert isolation circuit；Wherein
The voltage sampling circuit is suitable for acquiring the voltage signal of input voltage,
The voltage signal successively passes through level-one filter circuit, signal conditioning circuit, secondary filter circuit and is input to signal conversion
In isolation circuit；Wherein
The level-one filter circuit is suitable for voltage signal stablizing output to signal conditioning circuit；
The signal conditioning circuit is suitable for keeping voltage signal constant and export to secondary filter circuit；
The secondary filter circuit stablizes output to signal and converts isolation circuit after being suitable for filtering voltage signal；
The signal conversion isolation circuit is suitable for voltage signal being converted to I2After C signal, using being exported after level conversion.
Further, the voltage sampling circuit includes: the resistance R1, resistance R2 and divider resistance R4 being arranged in series；
The input voltage is after resistance R1, resistance R2, by being input to first order filter circuit after divider resistance R4 partial pressure.
Further, the level-one filter circuit includes: capacitor C1, capacitor C2 and resistance R3；Wherein
Capacitor C1, capacitor C2 one end connect over the ground, between the other end bridge resistance R3 constitute π type filter circuit.
Further, the signal conditioning circuit includes: operational amplifier U1, current-limiting resistance R5, feedback resistance R7 and drop-down
Resistance R8；Wherein
The in-phase end of the operational amplifier U1 is input terminal, and feedback is connected between the reverse side and output end of operational amplifier U1
Resistance R7；And
The output end of the operational amplifier U1 connects the pull down resistor R8 and current-limiting resistance R5.
Further, the secondary filter circuit includes: capacitor C3, capacitor C4, operational amplifier U2 and resistance R6；Wherein
Operational amplifier U2, resistance R6 and capacitor C4 constitute active filter circuit, i.e.,
The reverse side of the operational amplifier U2 is connected with output end constitutes voltage follower；
One end of resistance R6 is connected with current-limiting resistance R5 constitutes secondary filter circuit input end, and the other end connect to be formed with capacitor C4
The in-phase end of RC filter, the operational amplifier U2 is connected between resistance R6 and capacitor C4, and
The both ends of the capacitor C3 are connected to secondary filter circuit input end with the output end of operational amplifier U2 to be formed
Feedback network.
Further, the signal conversion isolation circuit includes: signal conversion chip and isolating chip；
I is converted to by signal conversion chip by the voltage signal of the secondary filter circuit filtering2After C signal, by institute
State isolating chip output；And
Pull-up resistor is connected separately in the SCL input/output terminal, SDA input/output terminal of isolating chip；And
Filter capacitor C5 and filter capacitor C6 are connected in the feeder ear of signal conversion chip and isolating chip.
Further, the full isolated DC voltage sample system further include: power isolation circuit；
The power isolation circuit includes: DC/DC isolation module, LC filter circuit and middle low-frequency filter circuit；
External power supply inputs DC/DC isolation module after LC filter circuit, and DC/DC isolation module converts outer power voltage
For after operating voltage by middle low-frequency filter circuit filter, while by operating voltage input isolating chip input stage feeder ear and
The feeder ear of operational amplifier U1, operational amplifier U2；
The output stage feeder ear of the isolating chip is provided by outer power voltage.
On the other hand, the present invention also provides a kind of working methods of full isolated DC voltage sample system, comprising:
Isolated power supply is provided by power isolation circuit for full isolated DC voltage sample system；And
The full isolated DC voltage sample system is suitable for exporting after the voltage signal of input is isolated.
Further, the working method is suitable for realizing using above-mentioned full isolated DC voltage sample system.
The invention has the advantages that full isolated DC voltage sample system according to the present invention and its working method are adopted
With electric resistance partial pressure, amplifier conditioning, two stage filter, signal conversion chip, low-voltage analog signal is made to be converted into I2C signal, and pass through
Isolating chip is output to main controller, and supply voltage uses DC/DC isolated power supply module, really realize entire circuit it is electrical every
From compared with traditional circuit, being greatly improved the anti-interference ability of circuit system, and compatibility is strong.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the circuit diagram of Traditional DC voltage sample observation circuit；
Fig. 2 is the system block diagram of full isolated DC voltage sample system according to the present invention；
Fig. 3 is voltage sampling circuit in input signal isolation module according to the present invention, level-one filter circuit, signal condition electricity
The circuit diagram on road and secondary filter circuit；
Fig. 4 is the circuit diagram of signal conversion isolation circuit in input signal isolation module according to the present invention；
Fig. 5 is the circuit diagram of power isolation circuit according to the present invention.
Specific embodiment
In conjunction with the accompanying drawings, the present invention is further explained in detail.These attached drawings are simplified schematic diagram, only with
Illustration illustrates basic structure of the invention, therefore it only shows the composition relevant to the invention.
Embodiment 1
Fig. 2 is the system block diagram of full isolated DC voltage sample system according to the present invention.
As shown in Fig. 2, present embodiments providing a kind of full isolated DC voltage sample system, comprising: input signal isolation
Module；The input signal isolation module is suitable for exporting after the voltage signal of input voltage is isolated；The input signal
Isolation module include: voltage sampling circuit, level-one filter circuit, signal conditioning circuit, secondary filter circuit and signal conversion every
From circuit；Wherein the voltage sampling circuit is suitable for acquiring the voltage signal of input voltage, and the voltage signal successively passes through one
Grade filter circuit, signal conditioning circuit, secondary filter circuit are input in signal conversion isolation circuit；The wherein first-level filtering wave
Circuit is suitable for voltage signal stablizing output to signal conditioning circuit；The signal conditioning circuit is suitable for keeping voltage signal constant
And it exports to secondary filter circuit；The secondary filter circuit be suitable for voltage signal is filtered after stablize output to signal conversion every
From circuit；The signal conversion isolation circuit is suitable for voltage signal being converted to I2After C signal, using defeated after level conversion
Out；Realize the isolation output of voltage signal.
Fig. 3 is voltage sampling circuit, level-one filter circuit, signal tune in input signal isolation module according to the present invention
Manage the circuit diagram of circuit and secondary filter circuit.
As shown in figure 3, in the present embodiment, the voltage sampling circuit includes: the resistance R1 being arranged in series, resistance R2,
And divider resistance R4；The input voltage is after resistance R1, resistance R2, by being input to the first order after divider resistance R4 partial pressure
Filter circuit, i.e.,
One end of the positive input terminal connection resistance R1 of input voltage, one end of the other end connection resistance R2 of resistance R1, resistance R2
The other end connection divider resistance R4 one end, divider resistance R4 the other end connection input voltage negative input end；Pass through increasing
Greatly, the resistance value for reducing divider resistance R4 accounts for the ratio of resistance R1, resistance R2 and the total resistance value of divider resistance R4, and then increases, reduces
The sample range of input voltage, to realize the wider array of input voltage of monitoring range.
In the present embodiment, the level-one filter circuit includes: capacitor C1, capacitor C2 and resistance R3；Wherein capacitor C1, electricity
The one end for holding C2 connects over the ground, and resistance R3 is bridged between the other end and constitutes π type filter circuit, meanwhile, the other end of capacitor C1 connects
It connects between resistance R2 and divider resistance R4；Level-one filter circuit can effectively reduce the pulsation of electric current, keep electric current smoother.
In the present embodiment, the signal conditioning circuit includes: operational amplifier U1, current-limiting resistance R5, feedback resistance R7
With pull down resistor R8；The operational amplifier U1 can be, but not limited to the AD822BR using the production of ANALOG DEVICES company,
This chip is a low-power consumption, FET input binary channels amplifier；The in-phase end of the operational amplifier U1 is input terminal and connects
Between resistance R3 and capacitor C2, feedback resistance R7 is connected between the reverse side and output end of operational amplifier U1；And it is described
The output end of operational amplifier U1 connects the pull down resistor R8 and current-limiting resistance R5, i.e. the output end connection of operational amplifier U1
One end of pull down resistor R8, pull down resistor R8 the other end ground connection, one end of current-limiting resistance R5 be connected to operational amplifier U1 and
Between pull down resistor R8, the other end of resistance R5 connects secondary filter circuit；According to short, the empty disconnected spy of void of operational amplifier U1
Property, voltage signal is transferred to output end after the in-phase end of operational amplifier U1, by the reverse side of operational amplifier U1 is equivalent, whole
Body electric current is pulled down resistance R8 consumption, so that voltage signal remains unchanged.
In the present embodiment, the secondary filter circuit includes: capacitor C3, capacitor C4, operational amplifier U2 and resistance R6；
The operational amplifier U2 can be, but not limited to the MC33272AD using the production of ON company；Operational amplifier U2, resistance R6 and electricity
Hold C4 and constitute active filter circuit, i.e.,
The reverse side of the operational amplifier U2 is connected to constitute voltage follower with output end；One end of resistance R6 and current limliting electricity
The other end for hindering R5, which is connected, constitutes secondary filter circuit input end, and the other end of resistance R6 connect to form RC filtering with capacitor C4
The in-phase end of device, the operational amplifier U2 is connected between resistance R6 and capacitor C4, and
The both ends of the capacitor C3 are connected to secondary filter circuit input end with the output end of operational amplifier U2 to be formed
The voltage signal of feedback network, the output end output of operational amplifier U2 is only dependent upon the value of RC filter；By voltage with
With device, load is made not influence filtering characteristic；Voltage signal is set to obtain fabulous adjustment by secondary filter circuit, even if ripple is flat
It is smooth.
Fig. 4 is the circuit diagram of signal conversion isolation circuit in input signal isolation module according to the present invention.
As shown in figure 4, in the present embodiment, the signal conversion isolation circuit includes: signal conversion chip and isolated core
Piece；The signal conversion chip can be, but not limited to the AD7991YRJZ-0RL using the production of ANALOG DEVICES company, should
Money chip is 4 channels, 12 ADC, and built-in I2C compatibility interface, conversion time representative value: 1us；The isolating chip can with but
It is not limited to the ADuM1250ARZ using the production of ANALOG DEVICES company, this chip is hot plugged digital isolator, includes
Two-way I2C communication, open-drain interface do not need electric current driving substantially, and have the function of level conversion；It is filtered by the second level
The voltage signal of wave circuit filtering is converted to I by signal conversion chip2After C signal, exported by the isolating chip；And
Pull-up resistor is connected separately in the SCL input/output terminal, SDA input/output terminal of isolating chip；And it is converted in signal
The feeder ear of chip and isolating chip is connected with filter capacitor C5 and filter capacitor C6, i.e.,
No. 8 pins of No. 3 pins of the output end connection signal conversion chip of operational amplifier U2, signal conversion chip connect work
Make power supply, No. 2 pins of No. 2 pins connection isolating chip of signal conversion chip, No. 1 pin connection of signal conversion chip every
No. 3 pins of off-chip piece, No. 7 pins of signal conversion chip and No. 4 pins of isolating chip are grounded, and the one of filter capacitor C5
End connection working power, the other end ground connection of filter capacitor C5, one end of pull-up resistor R10 is connected to the 2 of signal conversion chip
Number between pin and No. 2 pins of isolating chip, pull-up resistor R10 another one end connects working power, and the one of pull-up resistor R9
End is connected between No. 1 pin of signal conversion chip and No. 3 pins of isolating chip, and the other end of pull-up resistor R9 connects work
Make power supply, one end of filter capacitor C6 connects working power, the other end ground connection of filter capacitor C6, No. 8 pins of isolating chip
External power supply, the SDA input terminal of No. 7 pins connection main controller of isolating chip are connected, No. 6 pins of isolating chip connect master control
The SCL input terminal of device, one end of pull-up resistor R11 be connected to isolating chip No. 6 pins and main controller SCL input terminal it
Between, the other end of pull-up resistor R11 connects external power supply, one end of pull-up resistor R12 be connected to isolating chip No. 7 pins and
Between the SDA input terminal of main controller, the other end of pull-up resistor R12 connects external power supply, and one end connection of filter capacitor C7 is outer
Portion's power supply, the other end ground connection of filter capacitor C7, No. 5 pins ground connection of isolating chip；The working power is adapted to provide for signal
Voltage needed for conversion chip；The reliability of signal conversion chip can be enhanced in filter capacitor C5；Pull-up resistor R9, R10, R11 and
R12 can guarantee original levels anti-interference ability；The voltage signal of sampling is converted into I2C signal, fast response time, reliability and
Safety is effectively improved.
Fig. 5 is the circuit diagram of power isolation circuit according to the present invention.
As shown in figure 5, in the present embodiment, the full isolated DC voltage sample system further include: power isolation circuit；
The power isolation circuit includes: DC/DC isolation module, LC filter circuit and middle low-frequency filter circuit；The DC/DC isolation mode
Block can be, but not limited to the R2S-0505/H using the production of RECOM company, which is isolated DC/DC conversion
Device, working efficiency are up to 85%, are encapsulated using 8-SMD module (5 lead), small in size；External power supply is defeated after LC filter circuit
Enter DC/DC isolation module, DC/DC isolation module is converted to outer power voltage after operating voltage by middle low-frequency filter circuit
Filtering, while by the feeder ear of operating voltage input signal conversion chip, the input stage feeder ear and operation amplifier of isolating chip
The feeder ear of device U1, operational amplifier U2；The output stage feeder ear of the isolating chip is provided by outer power voltage, i.e.,
Electrolytic capacitor C8 and patch capacitor C9 are in parallel, and the one of external power supply connection electrolytic capacitor C8 and patch capacitor C9 is commonly connected
Another public connecting end ground connection of end, electrolytic capacitor C8 and patch capacitor C9, one end connection electrolytic capacitor C8 and patch of inductance L1
A public connecting end of chip capacitor C9, No. 1 pin of the other end connection DC/DC isolation module of inductance L1, DC/DC isolation module
No. 2 pins and No. 3 pins between No. 4 pins of one Y capacitance CY1, DC/DC isolation module of series connection connect big bulk capacitance
One end of C10, the other end ground connection of big bulk capacitance C10, small bulk capacitance C11 are connected in parallel on the both ends of big bulk capacitance C10；It is logical
The mixed noise of external power supply and interference can effectively be inhibited by crossing LC filter circuit；It can be to work by middle low-frequency filter circuit
Voltage is filtered；Common mode interference can be eliminated by Y capacitance CY1；Simultaneously in order to which whether monitoring power supply is normal, can incite somebody to action
Operating voltage accesses signal conversion chip, is converted to I by signal conversion chip2It is defeated by the isolating chip after C signal
Out, i.e., No. 4 pins of DC/DC isolation module simultaneously connection signal conversion chip No. 4 and No. 6 pins.
Embodiment 2
On the basis of embodiment 1, the present embodiment 2 also provides a kind of working method of full isolated DC voltage sample system, packet
It includes: providing isolated power supply by power isolation circuit for full isolated DC voltage sample system；And the full isolated DC electricity
Pressure sampling system is suitable for exporting after the voltage signal of input is isolated.
In the present embodiment, the working method is suitable for using full isolated DC voltage sample system as described in Example 1
System is realized.
In conclusion the present invention passes through input signal isolation module；What the input signal isolation module was suitable for input
Voltage signal exports after being isolated；The input signal isolation module includes: voltage sampling circuit, level-one filter circuit, letter
Number conditioning circuit, secondary filter circuit and signal convert isolation circuit；Wherein the voltage sampling circuit is suitable for acquiring input
Voltage signal, the voltage signal successively pass through level-one filter circuit, signal conditioning circuit, secondary filter circuit and are input to signal
It converts in isolation circuit；Wherein the first-level filtering wave circuit is suitable for voltage signal stablizing output to signal conditioning circuit；It is described
Signal conditioning circuit is suitable for keeping voltage signal constant and export to secondary filter circuit；The secondary filter circuit is suitable for will be electric
Stablize output to signal conversion isolation circuit after pressing signal filtering；The signal conversion isolation circuit is suitable for converting voltage signal
For I2After C signal, using being exported after level conversion, to realize the isolation output of voltage signal.
In conclusion the present invention passes through voltage sampling circuit, level-one filter circuit, signal conditioning circuit, secondary filter electricity
Road and signal conversion isolation circuit and the isolation for cooperating power isolation circuit to realize voltage signal export, and pass through isolated from power
Circuit realizes effect and inhibits the mixed noise of external power supply and interference, that is, realizes the Duoble of voltage signal and external power supply
From, the anti-interference ability of circuit system is greatly improved, and compatibility is strong, it is powerful to monitor multichannel input voltage simultaneously.
Taking the above-mentioned ideal embodiment according to the present invention as inspiration, through the above description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property range is not limited to the contents of the specification, it is necessary to which the technical scope thereof is determined according to the scope of the claim.
Claims (9)
1. a kind of full isolated DC voltage sample system characterized by comprising
Input signal isolation module；
The input signal isolation module is suitable for exporting after the voltage signal of input voltage is isolated；
The input signal isolation module includes: voltage sampling circuit, level-one filter circuit, signal conditioning circuit, secondary filter
Circuit and signal convert isolation circuit；Wherein
The voltage sampling circuit is suitable for acquiring the voltage signal of input voltage,
The voltage signal successively passes through level-one filter circuit, signal conditioning circuit, secondary filter circuit and is input to signal conversion
In isolation circuit；Wherein
The level-one filter circuit is suitable for voltage signal stablizing output to signal conditioning circuit；
The signal conditioning circuit is suitable for keeping voltage signal constant and export to secondary filter circuit；
The secondary filter circuit stablizes output to signal and converts isolation circuit after being suitable for filtering voltage signal；
The signal conversion isolation circuit is suitable for voltage signal being converted to I2After C signal, using being exported after level conversion.
2. full isolated DC voltage sample system as described in claim 1, which is characterized in that
The voltage sampling circuit includes: the resistance R1, resistance R2 and divider resistance R4 being arranged in series；
The input voltage is after resistance R1, resistance R2, by being input to first order filter circuit after divider resistance R4 partial pressure.
3. full isolated DC voltage sample system as claimed in claim 2, which is characterized in that
The level-one filter circuit includes: capacitor C1, capacitor C2 and resistance R3；Wherein
Capacitor C1, capacitor C2 one end connect over the ground, between the other end bridge resistance R3 constitute π type filter circuit.
4. full isolated DC voltage sample system as claimed in claim 3, which is characterized in that
The signal conditioning circuit includes: operational amplifier U1, current-limiting resistance R5, feedback resistance R7 and pull down resistor R8；Wherein
The in-phase end of the operational amplifier U1 is input terminal, and feedback is connected between the reverse side and output end of operational amplifier U1
Resistance R7；And
The output end of the operational amplifier U1 connects the pull down resistor R8 and current-limiting resistance R5.
5. full isolated DC voltage sample system as claimed in claim 4, which is characterized in that
The secondary filter circuit includes: capacitor C3, capacitor C4, operational amplifier U2 and resistance R6；Wherein
Operational amplifier U2, resistance R6 and capacitor C4 constitute active filter circuit, i.e.,
The reverse side of the operational amplifier U2 is connected with output end constitutes voltage follower；
One end of resistance R6 is connected with current-limiting resistance R5 constitutes secondary filter circuit input end, and the other end connect to be formed with capacitor C4
The in-phase end of RC filter, the operational amplifier U2 is connected between resistance R6 and capacitor C4, and
The both ends of the capacitor C3 are connected to secondary filter circuit input end with the output end of operational amplifier U2 to be formed
Feedback network.
6. full isolated DC voltage sample system as claimed in claim 5, which is characterized in that
The signal conversion isolation circuit includes: signal conversion chip and isolating chip；
I is converted to by signal conversion chip by the voltage signal of the secondary filter circuit filtering2After C signal, by described
Isolating chip output；And
Pull-up resistor is connected separately in the SCL input/output terminal, SDA input/output terminal of isolating chip；And
Filter capacitor C5 and filter capacitor C6 are connected in the feeder ear of signal conversion chip and isolating chip.
7. full isolated DC voltage sample system as claimed in claim 6, which is characterized in that
The full isolated DC voltage sample system further include: power isolation circuit；
The power isolation circuit includes: DC/DC isolation module, LC filter circuit and middle low-frequency filter circuit；
External power supply inputs DC/DC isolation module after LC filter circuit, and DC/DC isolation module converts outer power voltage
For after operating voltage by middle low-frequency filter circuit filter, while by operating voltage input isolating chip input stage feeder ear and
The feeder ear of operational amplifier U1, operational amplifier U2；
The output stage feeder ear of the isolating chip is provided by outer power voltage.
8. a kind of working method of full isolated DC voltage sample system characterized by comprising
Isolated power supply is provided by power isolation circuit for full isolated DC voltage sample system；And
The full isolated DC voltage sample system is suitable for exporting after the voltage signal of input is isolated.
9. working method according to claim 8, which is characterized in that
The working method is suitable for realizing using such as the described in any item full isolated DC voltage sample systems of claim 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910119226.6A CN109541277A (en) | 2019-02-18 | 2019-02-18 | Full isolated DC voltage sample system and its working method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910119226.6A CN109541277A (en) | 2019-02-18 | 2019-02-18 | Full isolated DC voltage sample system and its working method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109541277A true CN109541277A (en) | 2019-03-29 |
Family
ID=65838943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910119226.6A Pending CN109541277A (en) | 2019-02-18 | 2019-02-18 | Full isolated DC voltage sample system and its working method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109541277A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110763908A (en) * | 2019-11-11 | 2020-02-07 | 绵阳市维博电子有限责任公司 | Digital display DC meter |
| CN111490771A (en) * | 2020-04-17 | 2020-08-04 | 珠海市运泰利自动化设备有限公司 | Interference signal filtering isolation circuit, system and method |
| CN112748356A (en) * | 2019-10-31 | 2021-05-04 | 常州星宇车灯股份有限公司 | Isolated signal conditioning module |
| CN113153643A (en) * | 2021-05-20 | 2021-07-23 | 中国华能集团清洁能源技术研究院有限公司 | Wind network cooperative intelligent control water electrolysis hydrogen production system and working method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201859167U (en) * | 2010-11-12 | 2011-06-08 | 北京宇航系统工程研究所 | Analog quantity acquisition converter |
| CN102255275A (en) * | 2011-08-01 | 2011-11-23 | 常熟开关制造有限公司(原常熟开关厂） | DC low voltage circuit breaker protection device |
| CN103631176A (en) * | 2013-08-30 | 2014-03-12 | 天津大学 | FPGA-based ultrahigh-speed industrial controller |
| CN103698579A (en) * | 2013-12-30 | 2014-04-02 | 长沙奥托自动化技术有限公司 | Direct-current voltage sampling device of low-voltage frequency converter |
| CN105548656A (en) * | 2015-12-04 | 2016-05-04 | 珠海万力达电气自动化有限公司 | Direct current high voltage isolation sampling circuit |
| CN108023483A (en) * | 2017-12-15 | 2018-05-11 | 合肥惠科金扬科技有限公司 | A kind of DC isolation power supply |
-
2019
- 2019-02-18 CN CN201910119226.6A patent/CN109541277A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201859167U (en) * | 2010-11-12 | 2011-06-08 | 北京宇航系统工程研究所 | Analog quantity acquisition converter |
| CN102255275A (en) * | 2011-08-01 | 2011-11-23 | 常熟开关制造有限公司(原常熟开关厂） | DC low voltage circuit breaker protection device |
| CN103631176A (en) * | 2013-08-30 | 2014-03-12 | 天津大学 | FPGA-based ultrahigh-speed industrial controller |
| CN103698579A (en) * | 2013-12-30 | 2014-04-02 | 长沙奥托自动化技术有限公司 | Direct-current voltage sampling device of low-voltage frequency converter |
| CN105548656A (en) * | 2015-12-04 | 2016-05-04 | 珠海万力达电气自动化有限公司 | Direct current high voltage isolation sampling circuit |
| CN108023483A (en) * | 2017-12-15 | 2018-05-11 | 合肥惠科金扬科技有限公司 | A kind of DC isolation power supply |
Non-Patent Citations (5)
| Title |
|---|
| ANALOG DEVIVES: "Completely Isolated, Robust, 4-Channel, Multiplexed Data Acquisition System for Industrial Level Signals", 《ANALOG DEVIVES》 * |
| ANALOG DEVIVES: "Fully Isolated Conductivity Measurement Data Acquisition System", 《ANALOG DEVIVES》 * |
| 周雪: "《模拟电子技术》", 31 January 2017, 西安电子科技大学出版社 * |
| 戈素贞 等: "《模拟电子技术基础与应用实例》", 31 August 2012, 北京航空航天大学出版社 * |
| 牛跃听 等: "《CAN总线嵌入式开发——从入门到实践》", 30 April 2016, 北京航空航天大学出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112748356A (en) * | 2019-10-31 | 2021-05-04 | 常州星宇车灯股份有限公司 | Isolated signal conditioning module |
| CN110763908A (en) * | 2019-11-11 | 2020-02-07 | 绵阳市维博电子有限责任公司 | Digital display DC meter |
| CN111490771A (en) * | 2020-04-17 | 2020-08-04 | 珠海市运泰利自动化设备有限公司 | Interference signal filtering isolation circuit, system and method |
| CN113153643A (en) * | 2021-05-20 | 2021-07-23 | 中国华能集团清洁能源技术研究院有限公司 | Wind network cooperative intelligent control water electrolysis hydrogen production system and working method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109541277A (en) | Full isolated DC voltage sample system and its working method | |
| DE102010036514A1 (en) | Device and method for monitoring a photovoltaic system | |
| CN110501625A (en) | A kind of IGBT saturation tube voltage drop on-line measurement circuit | |
| CN110763909A (en) | Digital display DC meter and voltage sampling circuit thereof | |
| CN106953297A (en) | A kind of protection circuit | |
| CN202330520U (en) | High-voltage isolation sampling circuit | |
| CN206389350U (en) | A kind of light-coupled isolation communicating circuit | |
| CN203133243U (en) | Floating-ground test system | |
| CN110149109A (en) | Isolated driving signal transmission circuit | |
| CN107271763B (en) | Current sampling circuit, electronic trip unit, breaker | |
| CN106505856B (en) | Input voltage auto-adjusting circuit and electronic equipment | |
| CN102710248A (en) | Isolated voltage acquisition circuit | |
| CN209894959U (en) | High-common-mode-interference-resistance small-signal isolation sampling conditioning circuit of electronic transformer | |
| CN207516439U (en) | Alternating current acquisition module and detection device | |
| CN110244176A (en) | A kind of high-tension connector fault detection system and high-voltage power system | |
| CN106100128B (en) | Monitoring device is isolated in active power distribution network intelligent terminal accumulator | |
| CN202014236U (en) | Input/output isolation module | |
| CN110690757B (en) | Data monitoring device of electric power transmission and distribution system | |
| CN109839561A (en) | A kind of switching signal Acquisition Circuit with status detection function | |
| CN106980037A (en) | Alternating current detection circuit of bidirectional vehicle-mounted charger and electric automobile | |
| CN106526504A (en) | Power supply management chip and mobile device | |
| CN207717884U (en) | A kind of detector of trolley coach electromagnetic filter | |
| CN106020074A (en) | One-valuing one-adding diagnosis functional safety analog input circuit | |
| CN209329320U (en) | A kind of fast charge data line | |
| CN208589977U (en) | A kind of conditioning circuit of sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190329 |
|
| RJ01 | Rejection of invention patent application after publication |