CN201562007U - Intelligent non-contact type high-voltage electroscope - Google Patents

Abstract

The utility model relates to the technical field of high-voltage electric checking, in particular to an intelligent non-contact type high-voltage electroscope. The intelligent non-contact type high-voltage electroscope comprises a parallel plate capacitor, a multi-path analog switch, a differential amplification circuit, a rectification filter circuit, a single chip computer and a voice alarm circuit, wherein the parallel plate capacitor, the multi-path analog switch, the differential amplification circuit, the rectification filter circuit, the single chip computer and the voice alarm circuit are electrically connected sequentially, and a self-checking signal is input into the multi-path analog switch. The utility model realizes non-contact electric checking and has high response speed. In the electric checking process, a proper alarm threshold is automatically selected aiming at different voltage grades (220V to 1000KV), the electric checking of a measured object with the voltage grade of 220V to 1000KV is realized, and humanized voice prompt is provided.

Description

The intelligent non-contact type high voltage electroscope

Technical field

The utility model relates to the high voltage testing technical field, relates in particular to a kind of intelligent non-contact type high voltage electroscope.

Background technology

At present, high voltage electroscope can be divided into contact and contactless two kinds by the electrical verification mode, wherein contact electroscope existing practical application in electric system, and existing relevant criterion has been carried out standard to the galvanoscopic design of contact, manufacturing and test method.

The capacitance partial pressure principle that the contact electroscope is based on mostly realizes electrical verification.Its end (high-voltage arm) directly contacts with detected equipment, constitutes the electric capacity of a PF level between high-voltage arm and the electrified body, realizes electroscope function by the electric current that detection is flow through on the stray capacitance between other end of electroscope and the earth.

Contact electroscope electrical verification operation must directly contact with high-tension apparatus the time, at the electric pressure height and there is certain potential safety hazard in the following time of situation that the insulation condition can not get guaranteeing.Simultaneously because the maturation of UHV transmission technology, the electric pressure of transmission line of electricity is more and more higher, and according to the regulation of ultra-high-tension power transmission line terrain clearance, in general the line voltage distribution grade is high more, circuit is liftoff just should be high more, and this has brought inconvenience for the galvanoscopic operation of contact.

In view of galvanoscopic some the above shortcomings of contact, the non-contact type electricity checking device has been subjected to paying close attention to widely.But the present non-contact type electricity checking device ubiquity electrical verification shortcoming that repeatability is bad as a result, reliability is not high, cost is high on the market, and this type of electroscope is all developed at certain specific voltage grade, and applicability is not strong, is unfavorable for promoting the use of.

Think highly of the deficiency that renaturation is bad, reliability is not high, applicability is not strong in order to overcome existing non-contact type electricity checking, the utility model proposes a kind of intelligent non-contact type high voltage electroscope.

The utility model content

Whether the purpose of this utility model provides a kind of intelligent non-contact type high voltage electroscope, charged with fast and reliable ground check high-tension apparatus and transmission line of electricity.

For achieving the above object, the utility model adopts following technical scheme:

Plane-parallel capacitor, multiway analog switch, differential amplifier circuit, current rectifying and wave filtering circuit, single-chip microcomputer, voice alarm circuit, described plate condenser, multiway analog switch, differential amplifier circuit, current rectifying and wave filtering circuit, single-chip microcomputer, voice alarm circuit are electrically connected successively, wherein self-test signal input multiway analog switch.

Described single-chip microcomputer adopts C8051F330, described voice alarm circuit adopts the ISD1700 chip to constitute, described multiway analog switch adopts the CD4053 chip to constitute, and described differential amplifier circuit adopts the AD620 chip to constitute, and described current rectifying and wave filtering circuit adopts the second-order active filter circuit.

Plane-parallel capacitor adopts two blocks of alfer plectanes that thickness is 3mm, and therebetween one thickness is that the strong plastic plate of insulating property of 5mm is made.

The case surface of described intelligent non-contact type high voltage electroscope disposes power switch, diameter is red light emitting diodes, loudspeaker, battery case and the insulating bar jack of 5mm.

The utlity model has following advantage and good effect:

1) realizes the noncontact electrical verification;

2) provide the voice suggestion of hommization, guiding operation personnel correctly use;

3) response speed is fast, and data operation speed is fast, the conversion accuracy height;

4) usable range is wide, adjusts alarming threshold value in the electrical verification process automatically, has realized to electric pressure being the electrical verification of the measured object of 220V-1000KV.

Description of drawings

Fig. 1 is the intelligent non-contact type high voltage electroscope composition frame chart that the utility model provides.

Fig. 2 is C8051F330 single-chip microcomputer and the peripheral circuit schematic diagram thereof that adopts in the utility model.

Fig. 3 is a multi-channel analog switch circuit schematic diagram in the utility model.

Fig. 4 is a differential amplifier circuit schematic diagram in the utility model.

Fig. 5 is a current rectifying and wave filtering circuit schematic diagram in the utility model.

Fig. 6 is a voice alarm circuit schematic diagram in the utility model.

Fig. 7 is a workflow diagram of the present utility model.

Wherein,

The 1-plane-parallel capacitor, 2-self-test signal, 3-multiway analog switch, 4-differential amplifier circuit, 5-current rectifying and wave filtering circuit, 6-single-chip microcomputer, 7-voice alarm circuit; The S1-start, the S2-self check is by judging S3-preliminary examination, S4-detection, S5-Y-X＞Z judgement, S6-audio alert.

Embodiment

The utility model is described in further detail in conjunction with the accompanying drawings with specific embodiment below:

The intelligent non-contact type high voltage electroscope that the utility model provides, the following technical scheme of concrete employing, referring to Fig. 1, comprise plane-parallel capacitor 1, multiway analog switch 3, differential amplifier circuit 4, current rectifying and wave filtering circuit 5, single-chip microcomputer 6, voice alarm circuit 7, above-mentioned plate condenser 1, multiway analog switch 3, differential amplifier circuit 4, current rectifying and wave filtering circuit 5, single-chip microcomputer 6, voice alarm circuit 7 are electrically connected successively, wherein 2 pin of self-test signal 2 input multiway analog switches 3.

Wherein, single-chip microcomputer 6 adopts C8051F330, and voice alarm circuit 7 adopts the ISD1700 chip to constitute.

Plane-parallel capacitor 1 adopts two blocks of alfer plectanes that thickness is 3mm, and therebetween one thickness is that the strong plastic plate of insulating property of 5mm is made.

The case surface of above-mentioned intelligent non-contact type high voltage electroscope disposes power switch, diameter is red light emitting diodes, loudspeaker, battery case and the insulating bar jack of 5mm.

The utility model adopts plane-parallel capacitor as sensing unit, by near the electric field the plane-parallel capacitor induction high-tension apparatus, thereby produces voltage between two-plate.Enter AD conversion unit after the processing such as this voltage signal process amplification, rectification, filtering, by single-chip microcomputer C8051F330 the voltage signal conversion is become digital signal, and the data that obtain are analyzed by single-chip microcomputer, judge whether this equipment has electricity, the control voice alarm circuit provides corresponding indication.Wherein, alarming threshold value by the C8051F330 single-chip microcomputer during according to different voltage environment detected value be provided with automatically.

C8051F330 single-chip microcomputer and the peripheral circuit schematic diagram thereof of Fig. 2 for adopting in the utility model, its each pin function of C8051F330 single-chip microcomputer is as follows: 1 pin is used for the Control work status indicator LED, 4 pin are input end of analog signal, 5 pin ground connection, 6 pin are working power, and 7,8 pin are the detail programming circuit interface, 13,14,15,16 pins are the voice alarm circuit control port, and 19 pin are analog multichannel switch circuit control port.

Fig. 3 is a multi-channel analog switch circuit schematic diagram in the utility model, and wherein, Vi1 and Vi2 are plane-parallel capacitor two end signals, P0.5 is used for controlling the work of CD4053, when P0.5 was 0, the signal of 12 pin and 2 pin was switched to 14 pin and 15 pin respectively, was about to the self-test signal place in circuit; When P0.5 was 1,13 pin and 1 pin signal were switched to 14 pin and 15 pin respectively, were about to plane-parallel capacitor two end signal places in circuit.

Fig. 4 is in the utility model in the differential amplifier circuit schematic diagram, and 2,3 pin of AD620 chip are the differential signal input end, connect analog multichannel switch circuit 14 and 15 pin respectively, and 6 pin are signal output part, and the resistance value of adjusting R16 can change enlargement factor.

Fig. 5 is a current rectifying and wave filtering circuit schematic diagram in the utility model, and Sin wherein is the voltage signal after difference is amplified, and exports 4 pin of input single-chip microcomputer C8051F330 through 6 pin from IC3 behind the rectifying and wave-filtering.

Fig. 6 is a voice alarm circuit schematic diagram in the utility model, and wherein, 4,5,6,7 pins of ISD1700 chip are the control port of single-chip microcomputer read-write ISD1700, and 9 pin are the phonetic entry port, and 13,15 pin connect loudspeaker.

Describe workflow of the present utility model below in conjunction with Fig. 7, can be divided into five stages: self check, preliminary examination, cycle detection, comparison, warning.After opening the electroscope power switch, the S1 that starts working of system, power light is bright to illustrate that then power work is normal, electroscope enters self check stage S2 automatically, if self check is not passed through, voice alarm circuit provides the warning of " this electroscope can't operate as normal ", if self check is passed through, electroscope enters preliminary examination link S3 automatically, with current detection to value X deposit single-chip microcomputer in, single-chip microcomputer according to the size reasonable of this value the threshold values Z of warning is set, after preliminary examination was finished, electroscope provided voice suggestion " beginning electrical verification ", electroscope enters circulation electrical verification stage S4, electroscope passes through to calculate the value Y of current location, and compares with preliminary examination value X, carries out alarm decision S5, as both difference Y-X during greater than the alarming threshold value Z that sets, judge that then measurand has electricity, providing voice warning S6 " has electricity danger ", and enters next circulation electrical verification S4.

Claims (4)

1. an intelligent non-contact type high voltage electroscope is characterized in that, comprising:

Plane-parallel capacitor (1), self-test signal (2), multi-channel analog switch circuit (3), differential amplifier circuit (4), current rectifying and wave filtering circuit (5), single-chip microcomputer (6), voice alarm circuit (7), described plate condenser (1), multi-channel analog switch circuit (3), differential amplifier circuit (4), current rectifying and wave filtering circuit (5), single-chip microcomputer (6), voice alarm circuit (7) are electrically connected successively, wherein self-test signal (2) input multiway analog switch (3).

2. intelligent non-contact type high voltage electroscope according to claim 1 is characterized in that:

Described single-chip microcomputer (6) adopts C8051F330, and described voice alarm circuit (7) adopts the ISD1700 chip to constitute, and described multiway analog switch (3) adopts the CD4053 chip to constitute, and described differential amplifier circuit (4) adopts the AD620 chip to constitute.

3. intelligent non-contact type high voltage electroscope according to claim 1 and 2 is characterized in that:

Plane-parallel capacitor (1) adopts two blocks of alfer plectanes that thickness is 3mm, and therebetween one thickness is that the strong plastic plate of insulating property of 5mm is made.

4. intelligent non-contact type high voltage electroscope according to claim 1 and 2 is characterized in that:

The case surface of described intelligent non-contact type high voltage electroscope disposes power switch, diameter is red light emitting diodes, loudspeaker, battery case and the insulating bar jack of 5mm.

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