CN204349937U - A kind of programmable-gain analog filtering system of earth mat current by pass testing apparatus - Google Patents
A kind of programmable-gain analog filtering system of earth mat current by pass testing apparatus Download PDFInfo
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- CN204349937U CN204349937U CN201520059888.6U CN201520059888U CN204349937U CN 204349937 U CN204349937 U CN 204349937U CN 201520059888 U CN201520059888 U CN 201520059888U CN 204349937 U CN204349937 U CN 204349937U
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Abstract
The utility model discloses a kind of programmable-gain analog filtering system of earth mat current by pass testing apparatus, it comprises signal output module, signal input pretreatment module is connected with analog filtering system connectors, analog filtering system is connected with automatic gain control system connectors, and automatic gain control system is connected with signal output module wire; Solving digital filtering that existing earth mat current by pass testing apparatus adopts digital filter system process measuring-signal to exist, to there is algorithm difficulty large, and gain-adjusted can not be carried out according to the Strength Changes of measuring-signal, make final measuring-signal resolution not high, equipment can not be made to be operated in the problems such as optimum resolution condition.
Description
Technical field
The utility model belongs to earth mat current by pass measuring technology, particularly relates to a kind of programmable-gain analog filtering system of earth mat current by pass testing apparatus.
Background technology
Earth mat current by pass testing apparatus is one of the most frequently used equipment of power system measuring earth mat earial drainage, conventional earth mat current by pass testing apparatus exports to host computer after adopting digital filter system process measuring-signal, digital filtering exports after adopting digital device to adopt certain algorithm that measuring-signal is carried out filtering, digital filtering is adopted to there is algorithm difficulty at earth mat current by pass testing apparatus large, and gain-adjusted can not be carried out according to the Strength Changes of measuring-signal, make final measuring-signal resolution not high, equipment can not be made to be operated in optimum resolution condition.
Utility model content
The technical problems to be solved in the utility model: the programmable-gain analog filtering system that a kind of earth mat current by pass testing apparatus is provided, it is large to there is algorithm difficulty in the digital filtering adopting digital filter system process measuring-signal to exist to solve existing earth mat current by pass testing apparatus, and gain-adjusted can not be carried out according to the Strength Changes of measuring-signal, make final measuring-signal resolution not high, equipment can not be made to be operated in the problems such as optimum resolution condition.
Technical solutions of the utility model:
A kind of programmable-gain analog filtering system of earth mat current by pass testing apparatus, it comprises signal output module, signal input pretreatment module is connected with analog filtering system connectors, analog filtering system is connected with automatic gain control system connectors, and automatic gain control system is connected with signal output module wire.
Signal input pretreatment module comprises capacitance-resistance low-pass filter circuit and resonant circuit, and capacitance-resistance low-pass filter circuit is connected with resonant circuit wire.
Analog filtering system is the butterworth filter that filtering chip is formed.
The beneficial effects of the utility model:
Compared with the utility model adopts digital filtering with earth mat current by pass testing apparatus in prior art, the utility model use analog filtering system can according to the intensity automatic regulating system gain of input signal, make system works in optimal resolution state, solving digital filtering that existing earth mat current by pass testing apparatus adopts digital filter system process measuring-signal to exist, to there is algorithm difficulty large, and gain-adjusted can not be carried out according to the Strength Changes of measuring-signal, make final measuring-signal resolution not high, equipment can not be made to be operated in the problems such as optimum resolution condition.
accompanying drawing illustrates:
Fig. 1 is the utility model structure composition schematic diagram.
embodiment:
A kind of programmable-gain analog filtering system of earth mat current by pass testing apparatus, it comprises signal output module, signal input pretreatment module is connected with analog filtering system connectors, analog filtering system is connected with automatic gain control system connectors, and automatic gain control system is connected with signal output module wire.
Signal input pretreatment module comprises capacitance-resistance low-pass filter circuit and resonant circuit, and capacitance-resistance low-pass filter circuit is connected with resonant circuit wire, and signal input pretreatment module is anticipated input signal, eliminates noise signals.
Analog filtering system is that the butterworth filter that filtering chip is formed carries out filtering, and filtering chip adopts max275 filtering chip.
Automatic gain control system, according to the intensity of input signal, regulates gain factor automatically, realizes the Gain tuning of 10-30dB.
Signal output module docking port carries out insulation blocking, ensures the safe and reliable operation of system.
Claims (3)
1. the programmable-gain analog filtering system of an earth mat current by pass testing apparatus, it comprises signal output module, it is characterized in that: signal input pretreatment module is connected with analog filtering system connectors, analog filtering system is connected with automatic gain control system connectors, and automatic gain control system is connected with signal output module wire.
2. the programmable-gain analog filtering system of a kind of earth mat current by pass testing apparatus according to claim 1, it is characterized in that: signal input pretreatment module comprises capacitance-resistance low-pass filter circuit and resonant circuit, and capacitance-resistance low-pass filter circuit is connected with resonant circuit wire.
3. the programmable-gain analog filtering system of a kind of earth mat current by pass testing apparatus according to claim 1, is characterized in that: analog filtering system is the butterworth filter that filtering chip is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520059888.6U CN204349937U (en) | 2015-01-28 | 2015-01-28 | A kind of programmable-gain analog filtering system of earth mat current by pass testing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520059888.6U CN204349937U (en) | 2015-01-28 | 2015-01-28 | A kind of programmable-gain analog filtering system of earth mat current by pass testing apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204349937U true CN204349937U (en) | 2015-05-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520059888.6U Active CN204349937U (en) | 2015-01-28 | 2015-01-28 | A kind of programmable-gain analog filtering system of earth mat current by pass testing apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204349937U (en) |
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2015
- 2015-01-28 CN CN201520059888.6U patent/CN204349937U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201130 Address after: 550000 No. 17 Binhe Road, Nanming District, Guizhou, Guiyang Patentee after: GUIZHOU POWER GRID Corp. Address before: Guiyang City, Guizhou province 550002 Baba Street No. 5 4 floor Patentee before: GUIZHOU POWER GRID CORPORATION, TRANSMISSION OPERATION MAINTENANCE BRANCH Patentee before: FUJIAN YIMIN ELECTRIC Co.,Ltd. |
|
| TR01 | Transfer of patent right |