CN205982431U - Ground resistance normalizing device - Google Patents
Ground resistance normalizing device Download PDFInfo
- Publication number
- CN205982431U CN205982431U CN201620775206.6U CN201620775206U CN205982431U CN 205982431 U CN205982431 U CN 205982431U CN 201620775206 U CN201620775206 U CN 201620775206U CN 205982431 U CN205982431 U CN 205982431U
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- circuit
- voltage
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- digital conversion
- electric current
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Abstract
The utility model discloses a ground resistance normalizing device, including microprocessor, voltage acquisition circuit, electric current acquisition circuit and analog to digital conversion circuit, voltage acquisition circuit meets analog to digital conversion circuit through voltage signal amplifier circuit, electric current acquisition circuit meets analog to digital conversion circuit through electric current signal amplification circuit, analog to digital conversion circuit meets microprocessor, through the output voltage of measurement ground resistance appearance and the electric current in the return circuit, calculate the average value and the actual value of voltage, the average value and the virtual value of electric current, ground resistance's resistance value, ground connection activation time isoparametric, and show the calculation on the display, also can send control computer etc. Through RS232 communication interface simultaneously, need not a large amount of manual record and calculation, avoided manual record or calculate in the error that appears, can effectively improve the efficiency of test, the result of test is accurate, it is directly perceived, high in degree of intelligenc, can satisfy the demand of test.
Description
Technical field
This utility model is related to a kind of measuring instrument, particularly a kind of earth resistance prover.
Background technology
Earth resistance prover of the prior art is only able to display the parameters such as output voltage, electric current, needs in experimentation
User voluntarily records and calculates other specification, and manual record and calculating tend to deviation or mistake, and the result of test is not
Enough accurately and directly perceived.
Content of the invention
In order to overcome the deficiencies in the prior art, this utility model provides a kind of intelligence degree high, disclosure satisfy that test needs
The earth resistance prover asked.
This utility model solves its technical problem and be employed technical scheme comprise that：
A kind of earth resistance prover, including microprocessor, voltage collection circuit, current collection circuit and analog digital conversion electricity
Road, the outfan of described voltage collection circuit connects the input of analog-digital conversion circuit as described by voltage signal amplifying circuit；Institute
State the input that current collection circuit connects analog-digital conversion circuit as described through current signal amplifier circuit；Analog-digital conversion circuit as described
Output terminate the input of described microprocessor, the input of described microprocessor is also associated with key circuit, and outfan is even
It is connected to display and communication module.
The outfan of described microprocessor is connected with AC/DC switching circuit, the output termination institute of described AC/DC switching circuit
State voltage collection circuit and current collection circuit.
The beneficial effects of the utility model are：Earth resistance prover of the present utility model is capable of measurement of Grounding Resistance instrument
Electric current in output end voltage and loop, calculates meansigma methodss and actual value, the meansigma methodss of electric current and virtual value, the ground connection electricity of voltage
The parameters such as the resistance value of resistance, ground start time, and the result calculating is shown over the display, can also pass through simultaneously
RS232 communication interface is sent to monitoring computer etc., need not substantial amounts of manual record and calculating, it is to avoid manual record or calculate
The error occurring, can effectively improve the efficiency of test, and accurately, intuitively, intelligence degree is high, disclosure satisfy that survey for the result of test
The demand of examination.
Brief description
With reference to the accompanying drawings and examples this utility model is further illustrated.
Fig. 1 is circuit block diagram of the present utility model.
Specific embodiment
With reference to Fig. 1, a kind of earth resistance prover, including microprocessor, voltage collection circuit, current collection circuit and mould
Number change-over circuit, the outfan of described voltage collection circuit connects the defeated of analog-digital conversion circuit as described by voltage signal amplifying circuit
Enter end；Described current collection circuit connects the input of analog-digital conversion circuit as described through current signal amplifier circuit；Described modulus
The output of change-over circuit terminates the input of described microprocessor, and the input of described microprocessor is connected with key circuit, defeated
Go out end and be connected with display, communication module and AC/DC switching circuit, the output of described AC/DC switching circuit terminates described voltage
Acquisition Circuit and current collection circuit.
Voltage sample end V1, V2 are parallel to the outfan of ground meter, and voltage collection circuit gathers ground meter
The voltage of feedback（Instrument internal simulation output）, voltage signal amplifying circuit is by analog voltage signal processing and amplifying, current sample
End A1, A2 be connected in series in test loop, current collection circuit gather product to be tested current signal, collect for simulation
Amount, analog quantity is converted to digital quantity and carries by analog current signal processing and amplifying, analog to digital conversion circuit by current signal amplifier circuit
Supply microprocessor, AC/DC switching circuit, according to the AC or DC voltage of input, switching direct current and AC measurment circuit, is pressed
Key circuit is used for the parameter of user's setting measurement, and display is used for the result parameter of display measurement, and RS232 communication interface is used for will
The result of measurement is sent to monitoring computer etc..
During work, by voltage sample end V1, V2 be connected to collection ground meter feedback end, by current sample end A1,
A2 is concatenated in test loop, is AC or DC voltage according to ground meter outfan, by AC/DC switched system work
Operation mode, voltage collection circuit gathers the voltage of the output of ground meter, then by voltage signal amplifying circuit by analog voltage
Signal processing and amplifying, finally sends in analog to digital conversion circuit, analog voltage signal is changed into digital voltage signal.Current acquisition
Current signal in circuit acquisition circuit, by current signal amplifier circuit by analog voltage signal processing and amplifying, finally sends into
In analog to digital conversion circuit, analog current signal is changed into digital current signal.
Microprocessor according to the algorithm setting, calculate the meansigma methodss of voltage and actual value, the meansigma methodss of electric current and virtual value,
The parameters such as the resistance value of earth resistance, ground start time, and the result calculating is shown over the display, user can pass through
Keypress function, the result of calculating is sent to monitoring computer etc. by RS232 communication interface, need not substantial amounts of manual record and meter
Calculate, it is to avoid manual record or the error occurring in calculating, the efficiency of test can be effectively improved, the result of test accurately, straight
See, intelligence degree is high, disclosure satisfy that the demand of test.
Claims (1)
1. a kind of earth resistance prover, including microprocessor, voltage collection circuit, current collection circuit and analog digital conversion electricity
Road is it is characterised in that the outfan of described voltage collection circuit connects analog-digital conversion circuit as described by voltage signal amplifying circuit
Input；Described current collection circuit connects the input of analog-digital conversion circuit as described through current signal amplifier circuit；Described mould
The output of number change-over circuit terminates the input of described microprocessor, and the input of described microprocessor is also associated with button electricity
Road, outfan is connected with display and communication module；The outfan of described microprocessor is connected with AC/DC switching circuit, described
The output of AC/DC switching circuit terminates described voltage collection circuit and current collection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620775206.6U CN205982431U (en) | 2016-07-21 | 2016-07-21 | Ground resistance normalizing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620775206.6U CN205982431U (en) | 2016-07-21 | 2016-07-21 | Ground resistance normalizing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205982431U true CN205982431U (en) | 2017-02-22 |
Family
ID=58025294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620775206.6U Expired - Fee Related CN205982431U (en) | 2016-07-21 | 2016-07-21 | Ground resistance normalizing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205982431U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109374974A (en) * | 2018-11-21 | 2019-02-22 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | A kind of communication device interface parameter test device |
| CN111901586A (en) * | 2020-07-29 | 2020-11-06 | 重庆市天实精工科技有限公司 | Camera grounding intelligent test system and method |
-
2016
- 2016-07-21 CN CN201620775206.6U patent/CN205982431U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109374974A (en) * | 2018-11-21 | 2019-02-22 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | A kind of communication device interface parameter test device |
| CN109374974B (en) * | 2018-11-21 | 2023-10-27 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | Communication equipment interface parameter testing device |
| CN111901586A (en) * | 2020-07-29 | 2020-11-06 | 重庆市天实精工科技有限公司 | Camera grounding intelligent test system and method |
| CN111901586B (en) * | 2020-07-29 | 2021-12-10 | 重庆市天实精工科技有限公司 | Camera grounding intelligent test system and method |
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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: 20170222 Termination date: 20190721 |