CN202710651U - Device for measuring direct voltage and current - Google Patents
Device for measuring direct voltage and current Download PDFInfo
- Publication number
- CN202710651U CN202710651U CN 201220278295 CN201220278295U CN202710651U CN 202710651 U CN202710651 U CN 202710651U CN 201220278295 CN201220278295 CN 201220278295 CN 201220278295 U CN201220278295 U CN 201220278295U CN 202710651 U CN202710651 U CN 202710651U
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- voltage
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- microcontroller
- measurement
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Abstract
A device for measuring direct voltage and current belongs to the voltage and current measuring field. The device comprises a microcontroller, a measuring module and a sampling circuit, wherein the microcontroller, the measuring module and the sampling circuit are integrated together, and the measuring module and the microcontroller is connected through a communication circuit. The device is connected in series in a direct current circuit during measuring, is convenient to install and simple in operation, is not affected by temperature, and magnitude of current and magnitude of voltage are measured at the same time.
Description
Technical field
The utility model relates to a kind of measurement mechanism of voltage and current, and is particularly a kind of for the DC current on pure electric automobile, battery management system, fuel battery electric system and the energy-accumulating power station and the measurement mechanism of voltage.
Background technology
Along with developing rapidly of Power Electronic Technique in recent years, the electric system such as energy-accumulating power station, unattended operation transformer station, battery management system, fuel cell power system are more and more higher to the requirement of electrical parameters detection.Particularly in some need to be to large electric current and high voltage measuring and control and the situation to survey electric current and voltage request higher accuracy, need to use a kind of easy for installation, safe and reliable, DC current that degree of accuracy is high and the measuring method of voltage.
General current measurer has Hall-type current sensor, resistance type current sensor at present.Based on the current sensor of Hall effect, easy for installation, but need separately power supply, because the temperature coefficient of Hall element is large, poor stability is so measuring accuracy is not high again.Resistance type current sensor, after impedance was constant, based on Ohm law, the electric current varies directly with the voltage, but need the line external controller, and fitting operation is inconvenient.
Resistance of current sensor series connection that the method for voltage measurement also is based on Hall effect is carried between two electrical voltage points, and is easy for installation, but have the situation of electric leakage in the system always, also needs independent power supply.
The utility model content
The utility model provides dc voltage and current measurement mechanism a kind of easy for installation, simple to operate.
The technical solution adopted in the utility model is: a kind of dc voltage and current measurement mechanism, and this device comprises microcontroller, measurement module and sample circuit, it is characterized in that; Microcontroller, measurement module and sample circuit integrate, and connect by telecommunication circuit between measurement module and the microcontroller.Because the three integrates, so when measuring, this device can be installed in the circuit-under-test easily, and do not need each several part is installed separately respectively, therefore simple to operate.
Further, measurement module comprises electric energy computation chip, sample circuit comprises current sensor and precision measurement resistance, the microprocessor controls electric energy computation chip is measured the magnitude of voltage at current sensor two ends and the magnitude of voltage at precision measurement resistance two ends, and converting the magnitude of voltage that records to digital quantity, the information that will measure gained by electric energy computation chip again feeds back to microcontroller.。
Further, it is provided with display device, and real-time current and voltage data is transferred on the display device of energy is so that the user checks.
The utility model compared with prior art, it can be connected in the DC circuit, and measurement module, Acquisition Circuit and microcontroller are combined, and has easy for installationly, simple to operate, temperature influence not can be measured the beneficial effect of electric current and magnitude of voltage simultaneously.
Description of drawings
Fig. 1 is application measuring circuit of the present utility model;
Fig. 2 is the utility model cross section structure block diagram;
Fig. 3 is the utility model internal circuit diagram.
Mark is as follows among the figure: 20-is the dc voltage and current measurement mechanism; 21-high-tension battery group; The 22-load; The 1-1 port; The 2-2 port; The 3-3 port; The 4-4 port; The 5-measurement module; The 6-sample circuit; The 7-microcontroller; The 8-electric energy computation chip; The 9-current sensor; The 10-communication line.
Embodiment
In order to understand better technical characterstic of the present utility model, the utility model is further described below in conjunction with accompanying drawing.
Among Fig. 1 dc voltage and current measurement mechanism 20 is linked in the circuit of the load 22 of being powered by high-tension battery group 21, wherein dotted portion is dc voltage and current measurement mechanism 20, and cross section structure block diagram shown in Figure 2 is the cross section structure block diagram of dotted portion among Fig. 1.Fig. 3 shows the internal circuit diagram of dc voltage and current measurement mechanism, i.e. the internal circuit diagram of dotted portion among Fig. 1.
As Figure 1-3 measurement module 5 and sample circuit 6 are combined, thereby and measurement module 5 consist of dc voltage and current measurement mechanisms 20 with microcontroller 7 by telecommunication circuit 10 communication connections.Wherein measurement module 5 comprises electric energy computation chip 8, and sample circuit 6 comprises current sensor 9, No. 1 port one, No. 2 ports 2, No. 3 ports 3 and No. 4 ports 4 and divider resistance R1, R2 and precision measurement resistance R 3.The current sensor 9 optional resistance type current sensors of using, current sensor 9 is connected in series in the measuring circuit, two ends are connected on respectively No. 1 port one and No. 2 ports 2, measure current sensor 9 both end voltage values and convert digital quantity to by microcontroller 7 control electric energy computation chips 8, by electric energy computation chip 8 institute's measurement information is fed back to microcontroller 7 again, obtain the precision current value through algorithm; R1, R2 are the known divider resistance of resistance, R3 is precision measurement resistance, R1, R2 and R3 are connected between No. 3 ports 3 and No. 4 ports 4 as shown in Figure 3, record R3 both end voltage value and convert digital quantity to and feed back to microcontroller by electric energy computation chip 8, obtain the precise voltage value U at No. 3 ports 3 and No. 4 port 4 two ends in the dividing potential drop ratio by algorithm, U is the voltage of high-tension battery group 21 among the embodiment.On the dc voltage and current measurement mechanism 20 the display device (not shown) can also be set, in order to current and voltage data is shown in real time.
The drawings and specific embodiments in the utility model are used to provide further understanding of the present utility model and explanation, consist of the application's a part, but do not consist of improper restriction of the present utility model.
Claims (3)
1. dc voltage and current measurement mechanism, this device comprises microcontroller, measurement module and sample circuit, it is characterized in that: microcontroller, measurement module and sample circuit integrate, and connect by telecommunication circuit between measurement module and the microcontroller.
2. a kind of dc voltage and current measurement mechanism according to claim 1, it is characterized in that: measurement module comprises electric energy computation chip, sample circuit comprises current sensor and precision measurement resistance, the microprocessor controls electric energy computation chip is measured the magnitude of voltage at current sensor two ends and the magnitude of voltage at precision measurement resistance two ends, and converting the magnitude of voltage that records to digital quantity, the information that will measure gained by electric energy computation chip again feeds back to microcontroller.
3. a kind of dc voltage and current measurement mechanism according to claim 2, it is characterized in that: this device also is provided with display device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220278295 CN202710651U (en) | 2012-06-14 | 2012-06-14 | Device for measuring direct voltage and current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220278295 CN202710651U (en) | 2012-06-14 | 2012-06-14 | Device for measuring direct voltage and current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202710651U true CN202710651U (en) | 2013-01-30 |
Family
ID=47590939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220278295 Expired - Lifetime CN202710651U (en) | 2012-06-14 | 2012-06-14 | Device for measuring direct voltage and current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202710651U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103336169A (en) * | 2013-06-22 | 2013-10-02 | 青岛歌尔声学科技有限公司 | Direct current voltmeter and method for measuring voltage by using same |
| CN106324319A (en) * | 2016-08-02 | 2017-01-11 | 许继集团有限公司 | Direct current voltage and direct current signal sampling circuit |
-
2012
- 2012-06-14 CN CN 201220278295 patent/CN202710651U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103336169A (en) * | 2013-06-22 | 2013-10-02 | 青岛歌尔声学科技有限公司 | Direct current voltmeter and method for measuring voltage by using same |
| CN103336169B (en) * | 2013-06-22 | 2015-07-29 | 青岛歌尔声学科技有限公司 | D.C. voltmeter and apply the method that this voltage table carries out voltage measurement |
| CN106324319A (en) * | 2016-08-02 | 2017-01-11 | 许继集团有限公司 | Direct current voltage and direct current signal sampling circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160503 Address after: Jintian road Suzhou Industrial Park Suzhou city Jiangsu province 215000 No. 2 East Industrial Building 17 square Patentee after: Suzhou Ke Ke Xin Power Technology Co., Ltd. Address before: 100195 Beijing city Haidian District minzhuang Road No. 3, Tsinghua Science Park Yuquan Huigu No. 12 B106 Patentee before: Beijing Key Power Technology Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20130130 |
|
| CX01 | Expiry of patent term |