CN203551640U - Test circuit - Google Patents
Test circuit Download PDFInfo
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- CN203551640U CN203551640U CN201320684599.6U CN201320684599U CN203551640U CN 203551640 U CN203551640 U CN 203551640U CN 201320684599 U CN201320684599 U CN 201320684599U CN 203551640 U CN203551640 U CN 203551640U
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- 238000012360 testing method Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005352 galvanomagnetic phenomena Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model relates to a test circuit comprising a tested sample machine, and a power supply, a fuse and a current meter which are mutually connected in series with the tested sample machine. One parallel-connected access is additionally arranged between two ends of the access point of the current meter. The parallel-connected access comprises a relay, an indicating lamp and a switch. The input end of the relay is connected in series with the switch. The output end of the relay is connected in series with the indicating lamp. The parallel-connected access is additionally arranged in a measuring circuit between the power supply and the tested sample machine so that the state of the parallel-connected circuit is controlled and the parallel-connected circuit is disconnected in the measuring process without influencing measurement of current consumed by the tested machine. When the tested machine is in the normal working state, high-current power supply can be obtained, and continuous and uninterrupted power can be ensured to supply to the tested machine under the situation of requiring disconnection in the measuring tool range conversion. The circuit is simple in structure and quite convenient to popularize and use.
Description
Technical field
The utility model relates to electronic technology test correlative technology field, particularly a kind of current testing circuit on a large scale.
Background technology
At testing automobile electrical equipment during as the quiescent current of automobile audio/video entertainment, need the quiescent current under analog subscriber normal operating condition, that is: the duty of tested machine need to be transformed into shutdown sleep state from duty, and this process power supply is to keep stable.Current values is changed to the microampere order of dormant state by the ampere level of duty.Be generally used for the reometer of test or multimeter due to the restriction of measuring accuracy, need converted measurement gear (being transformed into microampere grade by ampere/milliampere shelves).If do not carried out the conversion of range, the precision of test result can not meet the demands, even can not read the numerical value while selecting ampere shelves (measure gear) of quiescent current or because electric current is excessive, exceed and measure range and damage survey instrument while being tested at duty (test gear select microampere shelves and).And the process need of conversion testing range disconnects test and connects, thereby cause the disconnection being connected in series, tested machine enters off-position, can not simulating actual conditions, if do not do the conversion of range, the measuring accuracy of electric current can not reach requirement again.
Summary of the invention
The purpose of this utility model is to provide a kind of current testing circuit on a large scale.
The utility model solves the problems of the technologies described above adopted technical scheme: a kind of current testing circuit on a large scale, it comprises a tested model machine, and a power supply, fuse and a reometer of mutually connecting with it, at the two ends of described reometer access point, add an alternate path.
In a preferred embodiment, described alternate path comprises a relay, a pilot lamp and a switch; The input end of described relay is connected with described switch, and the output terminal of described relay is connected with pilot lamp.
The beneficial effect of the utility model test circuit is: by the metering circuit between power supply and tested model machine, add alternate path, parallel circuit state is controlled, it is broken in measuring process, do not affect the measurement of tested machine current sinking; When survey instrument need to disconnect, connect, guarantee that, when survey instrument disconnects, tested machine obtains uninterrupted power supply.This circuit structure is simple, very convenient popularization and application.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the test circuit of an embodiment.
Embodiment
Below in conjunction with specific embodiment and accompanying drawing, the utility model test circuit is described in further detail.
Refer to Fig. 1, a kind of test circuit, it at least comprises a tested model machine 10, and a power supply 30, fuse and a reometer 20 of mutually connecting with it.Two ends at reometer 20 access points add an alternate path.
This alternate path comprises a relay 40, a pilot lamp 50 and a switch 60, and the input end of relay 40 is connected with switch 60, and the output terminal of relay 40 is connected with pilot lamp 50.
In this parallel circuit, when switch 60 disconnects, relay 40 coil two ends power down, the common port 41 of relay just with normal-closed end 42 adhesives, now parallel circuit can lead to super-high-current, tested model machine 10 can be in various mode of operations; When need are tested tested model machine 10 in shutdown during quiescent current during sleep state, switch 60 is merged, thereby relay 40 coil two ends connect voltage 30 and produce galvanomagnetic effect, the common port 41 of relay just with Chang Kaiduan 43 adhesives, now, pilot lamp 50 is bright, and reometer 20 is started working, reometer 20 is connected with tested model machine 10, and the electric current of demonstration is the quiescent current of tested model machine.
To sum up, the utility model test circuit, adds alternate path by the metering circuit between power supply and tested model machine, and parallel circuit state is controlled, and it is broken in measuring process, does not affect the measurement of tested machine current sinking; When survey instrument need to disconnect, connect, guarantee that, when survey instrument disconnects, tested machine obtains uninterrupted power supply.This circuit structure is simple, very convenient popularization and application.
Although description of the present utility model is carried out in conjunction with above specific embodiment,, those skilled in the art can carry out many replacements, modifications and variations, be apparent according to above-mentioned content.Therefore, all such substituting, improve and change are all included in the spirit and scope of attached claim.
Claims (2)
1. a test circuit, it comprises a tested model machine, and a power supply, fuse and a reometer of series connection mutually with it, it is characterized in that, at the two ends of described reometer access point, adds an alternate path.
2. test circuit according to claim 1, is characterized in that, described alternate path comprises a relay, a pilot lamp and a switch; The input end of described relay is connected with described switch, and the output terminal of described relay is connected with pilot lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320684599.6U CN203551640U (en) | 2013-10-31 | 2013-10-31 | Test circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320684599.6U CN203551640U (en) | 2013-10-31 | 2013-10-31 | Test circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203551640U true CN203551640U (en) | 2014-04-16 |
Family
ID=50469737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320684599.6U Expired - Fee Related CN203551640U (en) | 2013-10-31 | 2013-10-31 | Test circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203551640U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112415253A (en) * | 2020-11-16 | 2021-02-26 | 北京深思数盾科技股份有限公司 | Circuit and system for testing working current of circuit board |
-
2013
- 2013-10-31 CN CN201320684599.6U patent/CN203551640U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112415253A (en) * | 2020-11-16 | 2021-02-26 | 北京深思数盾科技股份有限公司 | Circuit and system for testing working current of circuit board |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 516006 Guangdong province Huizhou City Zhongkai high tech Zone and five West Road No. 103 Patentee after: HUIZHOU DESAY SV AUTOMOTIVE Co.,Ltd. Address before: 516006 Guangdong province Huizhou City Zhongkai high tech Zone and five West Road No. 103 Patentee before: HUIZHOU DESAY SV AUTOMOTIVE Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140416 |