CN203101484U - Circuit measurement circuit - Google Patents
Circuit measurement circuit Download PDFInfo
- Publication number
- CN203101484U CN203101484U CN 201320066986 CN201320066986U CN203101484U CN 203101484 U CN203101484 U CN 203101484U CN 201320066986 CN201320066986 CN 201320066986 CN 201320066986 U CN201320066986 U CN 201320066986U CN 203101484 U CN203101484 U CN 203101484U
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- hall element
- power module
- current
- power
- hall sensor
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Abstract
The utility model relates to electronic technology, and aims at providing a current measurement circuit which comprises a power module and a power supply connected with the input end of the power module, wherein the output end of the power module is connected with a Hall sensor; and the Hall sensor is connected with an ampere meter. After the technical scheme is adopted, when the current measurement circuit is used for measuring the current, the Hall sensor passes through a power cable of a circuit to be measured, and the power module is used for supplying direct current (DC) power for the Hall sensor, so that the current value of the measured power circuit can be obtained by multiplying the output signal of the Hall sensor and the measurement gear of the ampere meter led out from the power ground by the change of the Hall sensor. The measured current value can be increased by the change of the Hall sensor, so that the large current can be measured.
Description
Technical field
The utility model relates to electronic technology, is meant a kind of current measurement circuit especially.
Background technology
The measuring method of electric current commonly used is that direct-type is measured at present, promptly is converted to voltage by current sensor, generally realizes by sealing in sampling resistor, according to formula I=U/R, as long as detect the voltage U at current sensor two ends, knows that R just can calculate electric current.Though it is relatively more succinct to adopt current sensor directly to measure, cost is lower, but the current amplitude that current sensor (except the shunt type sensor) can bear is limited, so this class methods detection current capacity is less, the limit is tens of ampere, is difficult to realize for the detection of big electric current.
The utility model content
The utility model proposes a kind of current measurement circuit, it can be used for the detection of big electric current, and is easy to use, safe.
The technical solution of the utility model is achieved in that a kind of current measurement circuit, it comprises power module and the power supply source that is connected with described power module input end, the output terminal of described power module is connected with Hall element, and described Hall element is connected with reometer.
Pass through the technical program, when carrying out current measurement, Hall element is through on institute's survey time road power cable, supply with the Hall element direct supply by power module, with Hall element output signal and power supply be drawn out to reometer and measure gear, the no-load voltage ratio that is multiplied by Hall element again can obtain the current value in institute power scale loop.No-load voltage ratio by Hall element can enlarge the value of measuring electric current, realizes the measurement of big electric current.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the electrical schematic diagram of a kind of current measurement circuit of the utility model.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
A kind of current measurement circuit, it comprises power module and the power supply source that is connected with described power module input end, and the output terminal of described power module is connected with Hall element, and described Hall element is connected with reometer A1.
Pass through the technical program, when carrying out current measurement, Hall element is through on institute's survey time road power cable, supply with the Hall element direct supply by power module, with Hall element output signal and power supply be drawn out to reometer A1 and measure gear, the no-load voltage ratio that is multiplied by Hall element again can obtain the current value in institute power scale loop.No-load voltage ratio by Hall element can enlarge the value of measuring electric current, realizes the measurement of big electric current.
As shown in Figure 1, specifically be provided with and can be: described power module comprises the first power module G1, second source module G2, described Hall element comprises the first Hall element T1, the second Hall element T2 and the 3rd Hall element T3, the positive output end of the negative output terminal of the described first power module G1 and second source module G2 connects into the zero potential output terminal, the described first Hall element T1, the power supply positive input terminal of the second Hall element T2 and the 3rd Hall element T3 is connected with the positive voltage output end of the first power module G1, the described first Hall element T1, the power-input end of the second Hall element T2 and the 3rd Hall element T3 is connected with the negative voltage output terminal of second source module G2, the end of described reometer A1 and the first Hall element T1, the output terminal of the second Hall element T2 and the 3rd Hall element T3 is connected, and the other end of described reometer A1 is connected with the zero potential output terminal of described power module.
This patent adopts the closed-loop type Hall element as current measurement device, adopts 3 Hall elements can measure 3 groups of current values simultaneously.And the precision of Hall element is higher, can guarantee that the precision after the no-load voltage ratio still can reach requirement.Certainly, survey many groups simultaneously also in like manner.
Described power supply source is the alternating current of 220V, is convenient to choose, the output voltage of described power module is ± and the DC voltage of 24V, guarantee the electricity consumption requirement of Hall element.
The output terminal of the described first Hall element T1, the second Hall element T2 and the 3rd Hall element T3 is that three-line is connected with reometer A1, and this every circuit is provided with switch Q1, Q2 and Q3.To guarantee the independent electric current that can survey the wall scroll power cable.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (4)
1. current measurement circuit, it is characterized in that: comprise power module and the power supply source that is connected with described power module input end, the output terminal of described power module is connected with Hall element, and described Hall element is connected with reometer.
2. a kind of current measurement circuit according to claim 1, it is characterized in that: described power module comprises first, the second source module, described Hall element comprises first, the second and the 3rd Hall element, the positive output end of the negative output terminal of described first power module and second source module connects into the zero potential output terminal, described first, second is connected with the positive voltage output end of first power module with the power supply positive input terminal of the 3rd Hall element, described first, second is connected with the negative voltage output terminal of second source module with the power-input end of the 3rd Hall element, one end and first of described reometer, second is connected with the output terminal of the 3rd Hall element, and the other end of described reometer is connected with the zero potential output terminal of described power module.
3. a kind of current measurement circuit according to claim 2 is characterized in that: described power supply source is the alternating current of 220V, the output voltage of described power module is ± and the DC voltage of 24V.
4. a kind of current measurement circuit according to claim 2 is characterized in that: the output terminal of described first, second and the 3rd Hall element is that three-line is connected with reometer, and this every circuit is provided with switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320066986 CN203101484U (en) | 2013-02-05 | 2013-02-05 | Circuit measurement circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320066986 CN203101484U (en) | 2013-02-05 | 2013-02-05 | Circuit measurement circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203101484U true CN203101484U (en) | 2013-07-31 |
Family
ID=48852874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320066986 Expired - Fee Related CN203101484U (en) | 2013-02-05 | 2013-02-05 | Circuit measurement circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203101484U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104991107A (en) * | 2015-07-31 | 2015-10-21 | 苏州华电电气股份有限公司 | Measurement device of power grid primary current and method thereof |
-
2013
- 2013-02-05 CN CN 201320066986 patent/CN203101484U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104991107A (en) * | 2015-07-31 | 2015-10-21 | 苏州华电电气股份有限公司 | Measurement device of power grid primary current and method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130731 Termination date: 20160205 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |