CN201876500U - Self-checking earth resistance tester - Google Patents
Self-checking earth resistance tester Download PDFInfo
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- CN201876500U CN201876500U CN2010206154161U CN201020615416U CN201876500U CN 201876500 U CN201876500 U CN 201876500U CN 2010206154161 U CN2010206154161 U CN 2010206154161U CN 201020615416 U CN201020615416 U CN 201020615416U CN 201876500 U CN201876500 U CN 201876500U
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- earth resistance
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Abstract
The utility model belongs to the field of resistance test devices, and particularly relates to a self-checking earth resistance tester, which overcomes shortcomings that an auxiliary earth electrode is required to be laid and an earth unit is required to be isolated from equipment when a method of testing earth resistance by means of laying the auxiliary earth electrode is used in the prior art. The technical scheme includes that the self-checking earth resistance tester comprises a single chip microcomputer, an A/D (analog/digital) conversion module, a power source module, a FLASH module, a self-checking module and a communication port, and is characterized in that the single chip microcomputer is connected with the A/D conversion module, the power source module, the FLASH module, the self-checking module and the communication port respectively, and the A/D conversion module is connected with a current clamp, a voltage clamp and an H/S/E/EH interface respectively. The self-checking earth resistance tester is adaptable to requirements of earth resistance tests on various conditions, is simple in operation, convenient in use, wide in scope and range and fine in shock resistance.
Description
Technical field
The utility model belongs to resistance test device field, relates in particular to a kind of self check earth resistance tester.
Background technology
For the ground connection of testing various device and building thing is built the stake resistance of device, and measure soil resistivity and earthed system Leakage Current under the various conditions, generally use tradition to beat the method for auxiliary earth polar survey stake resistance.Can the achieve a butt joint test of earth resistance of the method, still, classic method need be beaten auxiliary earth polar, and grounding body and equipment must be isolated.Therefore said method has certain requirement and can't realize on-line measurement measuring condition.
The utility model content
In order to overcome defective of the prior art, but the purpose of this utility model provides a kind of self check earth resistance tester of playing auxiliary pile on-line measurement, having the intelligent test function of need not.
To achieve these goals, the technical scheme taked of the utility model is:
A kind of self check earth resistance tester, comprise: single-chip microcomputer, described single-chip microcomputer is connected with A/D modular converter, power module, FLASH, selftest module, PORT COM respectively, described A/D modular converter connect respectively current clamp, voltage clamp and H S E the EH interface.
The model of above-mentioned single-chip microcomputer is: 68H11.
A kind of test implementation method of utilizing above-mentioned self check earth resistance tester may further comprise the steps:
1) beginning,
2) single-chip microcomputer initialization,
3) key scan,
4) two, three, the four-wire method grounding resistance measurement, if, operating measurement program then, if otherwise enter next step,
5) ac voltage measurement, if, operating measurement program then, if otherwise enter next step,
6) soil resistivity is measured, if operating measurement program then is if otherwise returned for the 4th step.
With respect to prior art, the utility model has the advantages that:
(1) adopts split-core type meter formula measuring method, need not to beat auxiliary pile, adapt to the needs of earth resistance under the various conditions.
(2) but on-line measurement need not grounding body and equipment are isolated.
(3) advanced technology has the intelligent test function.
(4) can under the condition that does not disconnect earthed system, test the Leakage Current real effective.
(5) have self-calibration function, avoid the resistance of contact resistance and line, the influence that test result is caused.
(6) little, the accuracy problem that solved small resistance measurement of precision height, error.
(7) measurement function conversion adopts electronic switch to switch to improve system reliability.
(8) carry out communication with upper PC, the realization measurement data is uploaded, and is convenient to preserve and prints.
(9) big, the wide-range of simple to operate, easy to use, scope, have backlight illuminating system.
(10) plastic cement sheath, shock resistance is good.
Description of drawings
Fig. 1 circuit theory diagrams,
Fig. 2 program flow diagram,
Fig. 3 is a circuit connection diagram.
Embodiment
Below in conjunction with Figure of description and specific embodiment the utility model is further specified.
Referring to Fig. 1, a kind of self check earth resistance tester, comprise: single-chip microcomputer, A/D modular converter, power module, FLASH module, selftest module and PORT COM, it is characterized in that: described single-chip microcomputer is connected with PORT COM with A/D modular converter, power module, FLASH module, selftest module respectively, described A/D modular converter connect respectively current clamp, voltage clamp and H S E the EH interface.
Referring to Fig. 2, the test implementation method of self check earth resistance tester may further comprise the steps:
1) beginning,
2) single-chip microcomputer initialization,
3) key scan,
4) two, three, the four-wire method grounding resistance measurement, if, operating measurement program then, if otherwise enter next step,
5) ac voltage measurement, if, operating measurement program then, if otherwise enter next step,
6) soil resistivity is measured, if operating measurement program then is if otherwise returned for the 4th step.
Claims (2)
1. self check earth resistance tester, comprise: single-chip microcomputer, A/D modular converter, power module, FLASH module, selftest module and PORT COM, it is characterized in that: described single-chip microcomputer is connected with PORT COM with A/D modular converter, power module, FLASH module, selftest module respectively, described A/D modular converter connect respectively current clamp, voltage clamp and H S E the EH interface.
2. according to the described self check earth resistance tester of claim 1, it is characterized in that: the model of described single-chip microcomputer is: 68H11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206154161U CN201876500U (en) | 2010-11-19 | 2010-11-19 | Self-checking earth resistance tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206154161U CN201876500U (en) | 2010-11-19 | 2010-11-19 | Self-checking earth resistance tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201876500U true CN201876500U (en) | 2011-06-22 |
Family
ID=44164416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206154161U Expired - Fee Related CN201876500U (en) | 2010-11-19 | 2010-11-19 | Self-checking earth resistance tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201876500U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104950206A (en) * | 2015-07-21 | 2015-09-30 | 厦门一联高科信息技术有限公司 | Online detection system for power line ground protection |
| CN107831369A (en) * | 2017-12-19 | 2018-03-23 | 成都信息工程大学 | A kind of grounding resistance monitor instrument with self-test and correction |
-
2010
- 2010-11-19 CN CN2010206154161U patent/CN201876500U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104950206A (en) * | 2015-07-21 | 2015-09-30 | 厦门一联高科信息技术有限公司 | Online detection system for power line ground protection |
| CN107831369A (en) * | 2017-12-19 | 2018-03-23 | 成都信息工程大学 | A kind of grounding resistance monitor instrument with self-test and correction |
| CN107831369B (en) * | 2017-12-19 | 2020-07-03 | 成都信息工程大学 | Grounding resistance monitor with self-checking and correcting functions |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110622 Termination date: 20111119 |