CN205384346U - Pronunciation digital display insulator null value tester - Google Patents
Pronunciation digital display insulator null value tester Download PDFInfo
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- CN205384346U CN205384346U CN201520921623.2U CN201520921623U CN205384346U CN 205384346 U CN205384346 U CN 205384346U CN 201520921623 U CN201520921623 U CN 201520921623U CN 205384346 U CN205384346 U CN 205384346U
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- high frequency
- insulator
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- 239000012212 insulator Substances 0.000 title claims abstract description 40
- 230000005236 sound signal Effects 0.000 claims abstract description 4
- 238000001514 detection method Methods 0.000 claims description 13
- 230000009977 dual effect Effects 0.000 claims description 12
- 230000001131 transforming effect Effects 0.000 claims description 11
- 238000012360 testing method Methods 0.000 abstract description 18
- 238000005070 sampling Methods 0.000 abstract description 4
- 239000004973 liquid crystal related substance Substances 0.000 abstract 2
- 230000005540 biological transmission Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 229910052573 porcelain Inorganic materials 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- Measurement Of Resistance Or Impedance (AREA)
Abstract
The utility model discloses a pronunciation digital display insulator null value tester, it belongs to circuit testing instrument field, and it includes main control chip, high frequency variable pressure circuit, sampling resistor circuit, AD converter, liquid crystal display module and voice broadcast module, main control chip's control signal output inserts the input of being surveyed the insulator through the high frequency variable pressure circuit, the output of being surveyed the insulator inserts the input of sampling resistor circuit, the output of sampling resistor circuit inserts main control chip's input, main control chip's the audio signal output of looking inserts through the AD converter liquid crystal display module and voice broadcast module. The utility model has the advantages that the operation safety and stability, operation safety shows result accuracy more directly perceived.
Description
Technical field
This utility model belongs to circuit test instrument field, is specifically related to a kind of voice digital display insulator null detection instrument, and it is applicable to the test of more than 220kV transmission line of electricity porcelain insulator zero low value and insulating device megger test.
Background technology
At present, the method for transmission line of electricity porcelain insulator zero, low value test, for using pistol type tester, there is problems in that (1) test result is that hand of dial shows, numerical result display inaccuracy, it is impossible to accurate response insulator resistance；(2) to the satisfactory insulator of insulation resistance value without any prompting when testing, when contact and insulator steel cap loose contact, do not record result time, instrument is also without any prompting, easily there is test leakage, the equipment of surrounding is not only easily brought potential safety hazard by the electric current of side leakage, and threatens the personal safety of operator.Test device for insulation resistance structure of the prior art is complicated, and measurement is limited in scope, and certainty of measurement is low, and is not easy to operation.
Utility model content
Technical problem to be solved in the utility model there is provided a kind of easy to use, voice digital display insulator null detection instrument that degree of accuracy is high, for the instrument suitable in the test of more than 220kV transmission line of electricity porcelain insulator zero low value and insulating device megger test.
This utility model adopts the following technical scheme that
A kind of voice digital display insulator null detection instrument, it includes main control chip, high frequency transforming circuit, sample resistance circuit, A/D converter, LCD MODULE and voice broadcast module；The control signal outfan of described main control chip accesses the input of tested insulator through high frequency transforming circuit, the outfan of described tested insulator accesses the input of sample resistance circuit, the outfan of described sample resistance circuit accesses the input of main control chip, and the video/audio signal outfan of described main control chip accesses described LCD MODULE and voice broadcast module through A/D converter.
Further, described high frequency transforming circuit includes NPN type triode Q1 ~ Q2, diode D1 ~ D2, electric capacity C1 and high frequency transformer T1；The control signal outfan of described main control chip is respectively connected to the base stage of NPN type triode Q1 ~ Q2；The positive pole of described diode D1 connects the emitter stage of NPN type triode Q1, and its negative pole connects the colelctor electrode of NPN type triode Q1；The positive pole of described diode D2 connects the emitter stage of NPN type triode Q2, and its negative pole connects the colelctor electrode of NPN type triode Q2；The emitter stage of described NPN type triode Q1 connects the colelctor electrode of NPN type triode Q2；One end of described high frequency transformer T1 primary side connects diode D2 negative pole, the positive pole of another terminating diode D2 of described high frequency transformer T1 primary side through electric capacity C1, and the secondary side of described high frequency transformer T1 accesses the input of described tested insulator.
Further, described sample resistance circuit includes resistance R1 ~ R3 and dual operational amplifier LM358；The outfan of described tested insulator 7 accesses negative pole and the positive pole of described dual operational amplifier LM358 respectively through resistance R1 and R2, described resistance R3 is connected in parallel between negative pole and the outfan of described dual operational amplifier LM358, and the outfan of described dual operational amplifier LM358 accesses the input of described A/D converter.
Further, described main control chip is PIC16F series monolithic.
Further, the model of described LCD MODULE is JLX2402A.
Further, the model of described voice broadcast module is WT588D.
The beneficial effects of the utility model are: this utility model is by designing high frequency transformer circuit, the control signal of main control chip is processed through high frequency transformation, once produce side leakage electric current, reflux will not be produced and return main control chip end, both ensure that the safe and stable operation of this tester, also ensure that the safety of operator；Adopt LCD MODULE display test result, show more directly perceived also more accurate, during test, the satisfactory insulator of insulation resistance value there is prompting, namely when contact and insulator steel cap loose contact, do not record result time, voice broadcast module in this utility model can send alarm, so as to be not susceptible to test leakage.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the circuit theory diagrams of sample resistance circuit in this utility model
Wherein, 1 main control chip, 2 high frequency transforming circuits, 3 sample resistance circuit, 4A/D transducer, 5 LCD MODULE, 6 voice broadcast modules, 7 tested insulators.
Detailed description of the invention
Below in conjunction with Fig. 1-Fig. 2, the utility model is described in further detail.
The present embodiment includes main control chip 1, high frequency transforming circuit 2, sample resistance circuit 3, A/D converter 4, LCD MODULE 5 and voice broadcast module 6；The control signal outfan of described main control chip 1 accesses the input of tested insulator 7 through high frequency transforming circuit 2, the outfan of described tested insulator 7 accesses the input of sample resistance circuit 3, the outfan of described sample resistance circuit 3 accesses the input of main control chip 1, and the video/audio signal outfan of described main control chip 1 accesses described LCD MODULE 5 and voice broadcast module 6 through A/D converter 4.
Further, described high frequency transforming circuit 2 includes NPN type triode Q1 ~ Q2, diode D1 ~ D2, electric capacity C1 and high frequency transformer T1；The control signal outfan of described main control chip 1 is respectively connected to the base stage of NPN type triode Q1 ~ Q2；The positive pole of described diode D1 connects the emitter stage of NPN type triode Q1, and its negative pole connects the colelctor electrode of NPN type triode Q1；The positive pole of described diode D2 connects the emitter stage of NPN type triode Q2, and its negative pole connects the colelctor electrode of NPN type triode Q2；The emitter stage of described NPN type triode Q1 connects the colelctor electrode of NPN type triode Q2；One end of described high frequency transformer T1 primary side connects diode D2 negative pole, the positive pole of another terminating diode D2 of described high frequency transformer T1 primary side through electric capacity C1, and the secondary side of described high frequency transformer T1 accesses the input of described tested insulator 7.
Further, described sample resistance circuit 3 includes resistance R1 ~ R3 and dual operational amplifier LM358；The outfan of described tested insulator 7 accesses negative pole and the positive pole of described dual operational amplifier LM358 respectively through resistance R1 and R2, described resistance R3 is connected in parallel between negative pole and the outfan of described dual operational amplifier LM358, and the outfan of described dual operational amplifier LM358 accesses the input of described A/D converter 4.
Further, described main control chip 1 is PIC16F series monolithic.
Further, the model of described LCD MODULE 5 is JLX2402A.
Further, the model of described voice broadcast module 6 is WT588D.
The work process of the present embodiment is as follows:
This voice digital display insulator null detection instrument adopts MS's PIC16F series monolithic as main control chip 1, produce pwm pulse signal, control high frequency transforming circuit 2 produces 5000V high pressure and is loaded on the tested insulator 7 of test block, the sampling of voltage, electric current is realized by sample resistance circuit 3, the resistance of test block is calculated through main control chip 1, to LCD MODULE 5 and voice broadcast module 6 by output after A/D converter 4, carry out numerical value and show and voice broadcast.Voice numerical value insulator null detection instrument appearance design is exquisite, easy and simple to handle, and operator only need to open tester switch, button press triggers tester state to be tested and can start test job.
When using voice digital display insulator null detection instrument to test, insulator resistance can show in LCDs in real time, when resistance reaches the 500M Ω of regulatory requirements, and voice broadcast " good ", when resistance is lower than 500M Ω, voice broadcast numerical value.
The above embodiment is only preferred embodiment of the present utility model, and is not the exhaustive of the feasible enforcement of this utility model.For persons skilled in the art, any apparent change under the premise without departing substantially from this utility model principle and spirit, it is done, all should be contemplated as falling with within claims of the present utility model.
Claims (6)
1. a voice digital display insulator null detection instrument, it is characterised in that: it includes main control chip (1), high frequency transforming circuit (2), sample resistance circuit (3), A/D converter (4), LCD MODULE (5) and voice broadcast module (6)；The control signal outfan of described main control chip (1) accesses the input of tested insulator (7) through high frequency transforming circuit (2), the outfan of described tested insulator (7) accesses the input of sample resistance circuit (3), the outfan of described sample resistance circuit (3) accesses the input of main control chip (1), and the video/audio signal outfan of described main control chip (1) accesses described LCD MODULE (5) and voice broadcast module (6) through A/D converter (4).
2. a kind of voice digital display insulator null detection instrument according to claim 1, it is characterised in that: described high frequency transforming circuit (2) includes NPN type triode Q1 ~ Q2, diode D1 ~ D2, electric capacity C1 and high frequency transformer T1；The control signal outfan of described main control chip (1) is respectively connected to the base stage of NPN type triode Q1 ~ Q2；The positive pole of described diode D1 connects the emitter stage of NPN type triode Q1, and its negative pole connects the colelctor electrode of NPN type triode Q1；The positive pole of described diode D2 connects the emitter stage of NPN type triode Q2, and its negative pole connects the colelctor electrode of NPN type triode Q2；The emitter stage of described NPN type triode Q1 connects the colelctor electrode of NPN type triode Q2；One end of described high frequency transformer T1 primary side connects diode D2 negative pole, the positive pole of another terminating diode D2 of described high frequency transformer T1 primary side through electric capacity C1, and the secondary side of described high frequency transformer T1 accesses the input of described tested insulator (7).
3. a kind of voice digital display insulator null detection instrument according to claim 1 and 2, it is characterised in that: described sample resistance circuit (3) includes resistance R1 ~ R3 and dual operational amplifier LM358；The outfan of described tested insulator (7) accesses negative pole and the positive pole of described dual operational amplifier LM358 respectively through resistance R1 and R2, described resistance R3 is connected in parallel between negative pole and the outfan of described dual operational amplifier LM358, and the outfan of described dual operational amplifier LM358 accesses the input of described A/D converter (4).
4. a kind of voice digital display insulator null detection instrument according to claim 1, it is characterised in that: described main control chip (1) is PIC16F series monolithic.
5. a kind of voice digital display insulator null detection instrument according to claim 1, it is characterised in that: the model of described LCD MODULE (5) is JLX2402A.
6. a kind of voice digital display insulator null detection instrument according to claim 1, it is characterised in that: the model of described voice broadcast module (6) is WT588D.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520921623.2U CN205384346U (en) | 2015-11-18 | 2015-11-18 | Pronunciation digital display insulator null value tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520921623.2U CN205384346U (en) | 2015-11-18 | 2015-11-18 | Pronunciation digital display insulator null value tester |
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| Publication Number | Publication Date |
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| CN205384346U true CN205384346U (en) | 2016-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520921623.2U Active CN205384346U (en) | 2015-11-18 | 2015-11-18 | Pronunciation digital display insulator null value tester |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105334438A (en) * | 2015-11-18 | 2016-02-17 | 国家电网公司 | Zero value tester of voice digital display insulator |
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2015
- 2015-11-18 CN CN201520921623.2U patent/CN205384346U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105334438A (en) * | 2015-11-18 | 2016-02-17 | 国家电网公司 | Zero value tester of voice digital display insulator |
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| GR01 | Patent grant |