CN205539163U - Contact current testing device - Google Patents
Contact current testing device Download PDFInfo
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- CN205539163U CN205539163U CN201620067593.8U CN201620067593U CN205539163U CN 205539163 U CN205539163 U CN 205539163U CN 201620067593 U CN201620067593 U CN 201620067593U CN 205539163 U CN205539163 U CN 205539163U
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Abstract
The utility model relates to a current detection field, concretely relates to contact current testing device, including shell and hardware systems, hardware systems installs inside the shell, be equipped with display, alarm, dial switch and button on the shell, hardware systems includes the singlechip, the singlechip is connected with expansion interface and AD conversion unit, AD conversion unit is connected with the peak detection unit, the peak detection unit connection has accurate rectifier unit, accurate rectifier unit is connected with amplifier circuit, amplifier circuit is connected with the RC network, expansion interface connects the display, dial switch with press key -type connection expansion interface, the utility model discloses a single -chip microcomputer control system, the degree of automation height has, the test is accurate, advantages such as convenient to use.
Description
Technical field
This utility model relates to current detecting field, is specifically related to a kind of pick-up current test device.
Background technology
In motor operation course, power supply can leak to motor housing by the insulating barrier of motor stator winding, in the case of motor housing imperfect earth, produce shell earth potential difference, and constitute loop by the human body contacted with motor housing and the earth and produce pick-up current.The pick-up current exceeding required standard can cause the generation of accident of human electric shock, and therefore a kind of pick-up current of design detection device is in motor safety inspection highly important one.
Utility model content
For problem above, this utility model provides a kind of pick-up current test device, the advantages such as it is high that this utility model has automaticity, and test is accurate, easy to use.
To achieve these goals, the technical solution adopted in the utility model is as follows: a kind of pick-up current test device, including shell and hardware system, described hardware system is arranged on enclosure, described shell is provided with display, alarm, toggle switch and button, described hardware system includes single-chip microcomputer, described single-chip microcomputer connects expansion interface and AD conversion unit, described AD conversion unit connects peak detection unit, described peak detection unit connects precision rectifying unit, described precision rectifying unit connects amplifying circuit, described amplifying circuit connects resistance-capacitance network, described expansion interface connects display, described toggle switch with by bonded expansion interface.
Further, on described single-chip microcomputer, connection has communication interface.
Further, described AD conversion unit uses the double integrator model of 12.
Further, the gain of described amplifying circuit is divided into three gears, respectively 1,10 and 100 times.
The beneficial effects of the utility model:
This utility model have employed single-chip computer control system, in software layout, for improving the jamproof ability of instrument, in some key operations, in test process, the opening and closing of three phase mains, the reading of upper safety limit setting value, when tested motor is defective, startup etc. to alarm device, all have employed instruction redundancy operation, i.e. repeating same operation the most in the same time with a plurality of instruction, improve the reliability of operation, decrease the possibility by mistake surveying erroneous judgement, the most also there is automaticity high, the advantages such as test is accurate, easy to use.
Accompanying drawing explanation
Fig. 1 is this utility model shell mechanism schematic diagram.
Fig. 2 is this utility model hardware system schematic diagram.
Figure is numbered: 1-shell, 2-hardware system, 3-display, 4-alarm, 5-toggle switch, 6-button, 7-single-chip microcomputer, 8-expansion interface, 9-AD conversion unit, 10-peak detection unit, 11-precision rectifying unit, 12-amplifying circuit, 13-resistance-capacitance network, 14-communication interface.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, this utility model is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain this utility model, is not used to limit this utility model.
As illustrated in fig. 1 and 2, a kind of pick-up current test device, including shell 1 and hardware system 2, it is internal that described hardware system 2 is arranged on shell 1, described shell 1 is provided with display 3, alarm 4, toggle switch 5 and button 6, described hardware system 2 includes single-chip microcomputer 7, described single-chip microcomputer 7 connects expansion interface 8 and AD conversion unit 9, described AD conversion unit 9 connects peak detection unit 10, described peak detection unit 10 connects precision rectifying unit 11, described precision rectifying unit 11 connects amplifying circuit 12, described amplifying circuit 12 connects resistance-capacitance network 13, described expansion interface 8 connects display 3, described toggle switch 5 is connected expansion interface 8 with button 6.
On above-described embodiment preferably, on described single-chip microcomputer 7, connection has communication interface 14, it is simple to be connected with host computer.
On above-described embodiment preferably, described AD conversion unit 9 uses the double integrator model of 12.
On above-described embodiment preferably, the gain of described amplifying circuit 12 is divided into three gears, respectively 1,10 and 100 times.
Workflow of the present utility model is: be first turned on toggle switch 5, range is set, then button 6 is scanned, whether detection test button is pressed, without pressing, return button 6 and scan, if test button is pressed, then carry out the school zero of entirety, and then the pick-up current to motor measures and then shows on display screen 3, and then whether measurement of comparison result maximum transfinites, without transfiniting, carrying out button 6 again and scan, ready for measuring next time, if transfinited, alarm 4 is reported to the police.
Based on above-mentioned, this utility model has advantages in that this utility model have employed single-chip microcomputer 7 control system, in software layout, for improving the jamproof ability of instrument, in some key operations, in test process, opening of three phase mains, close, the reading of upper safety limit setting value, when tested motor is defective, startup etc. to alarm device, all have employed instruction redundancy operation, i.e. repeating same operation the most in the same time with a plurality of instruction, improve the reliability of operation, decrease the possibility by mistake surveying erroneous judgement, the most also there is automaticity high, test is accurately, the advantage such as easy to use.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all any amendment, equivalent and improvement etc. made within spirit of the present utility model and principle, within should be included in protection domain of the present utility model.
Claims (4)
1. a pick-up current test device, including shell and hardware system, it is characterized in that: described hardware system is arranged on enclosure, described shell is provided with display, alarm, toggle switch and button, described hardware system includes single-chip microcomputer, described single-chip microcomputer connects expansion interface and AD conversion unit, described AD conversion unit connects peak detection unit, described peak detection unit connects precision rectifying unit, described precision rectifying unit connects amplifying circuit, described amplifying circuit connects resistance-capacitance network, described expansion interface connects display, described toggle switch with by bonded expansion interface.
A kind of pick-up current test device the most according to claim 1, it is characterised in that: connect on described single-chip microcomputer and have communication interface.
A kind of pick-up current test device the most according to claim 1, it is characterised in that: described AD conversion unit uses the double integrator model of 12.
A kind of pick-up current test device the most according to claim 1, it is characterised in that: the gain of described amplifying circuit is divided into three gears, respectively 1,10 and 100 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620067593.8U CN205539163U (en) | 2016-01-24 | 2016-01-24 | Contact current testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620067593.8U CN205539163U (en) | 2016-01-24 | 2016-01-24 | Contact current testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205539163U true CN205539163U (en) | 2016-08-31 |
Family
ID=56769119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620067593.8U Expired - Fee Related CN205539163U (en) | 2016-01-24 | 2016-01-24 | Contact current testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205539163U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109541286A (en) * | 2018-12-27 | 2019-03-29 | 方圆广电检验检测股份有限公司 | A kind of pick-up current detection method and tester |
-
2016
- 2016-01-24 CN CN201620067593.8U patent/CN205539163U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109541286A (en) * | 2018-12-27 | 2019-03-29 | 方圆广电检验检测股份有限公司 | A kind of pick-up current detection method and tester |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160831 Termination date: 20190124 |