CN2128742Y

CN2128742Y - Contactless high-and low-voltage electroscope

Info

Publication number: CN2128742Y
Application number: CN 92226315
Authority: CN
Inventors: 裴宏伟
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-06-26
Filing date: 1992-06-26
Publication date: 1993-03-24
Anticipated expiration: 2002-06-26

Abstract

The utility model discloses a high and low voltage electroscope belonging to the field of the electronic testing instrument. The design of the electroscope is completed by the electromagnetic induction principle and adopting the electronic circuit techniques of amplifying an induced electromagnetic signal progressively and energizing an acoustic-optic element to alarm. The electroscope has the function of carrying out the contactless fast testing to test electrified instance of the low voltage circuit and the high voltage circuit. The utility model has the advantages of accurate testing, sensitive reaction, convenient operation, simple structure, low cost, small size, light weight, convenience for carrying and high safety, so the work efficiency can be effectively improved. The electroscope comprises an electromagnetic induction probe, an electromagnetic induction coil, etc.

Description

Contactless high-and low-voltage electroscope

A kind of non-contact type high and low pressure sound and light alarm electroscope belongs to the electronic detector technical field.

Existing low pressure electroscope and high voltage electroscope all are the ability electrical verification of using respectively and all must contact with electric wire when practical application, especially high voltage electroscope needs galvanoscopic pole prolonged or several poles connect and its spy is hooked on the hi-line could electrical verification in use, the practical operation trouble, inefficiency, its galvanoscopic manufacturing cost is also high, at these deficiencies, the applicant has designed a kind of novel electroscope.

The purpose of this utility model is to provide a kind of low pressure of can surveying can survey high pressure again, and non-contact type detects and can carry out the signal of its detection the novel electroscope of sound and light alarm.

The utility model utilizes electromagnetic induction principle, adopt with induced signal amplify, electronic circuit technology design such as warning finishes.

Connect to form a kind of touchless but the scheme of the utility model design is electromagnetic inductive probe, electromagnetic induction coil, direct supply, two-stage signal amplifying circuit, mix device via line such as oscillator-amplification circuit, luminotron, self coupling oscillator, buzzer, musical film and illuminating lamp to high and low pressure electric line charged all electrical verification pick-up units of sound and light alarm whether.

This design apparatus has low tension circuit and high-tension electricity circuit charged function of carrying out touchless fast detecting sound and light alarm whether, it also has processing ease, safe in utilization, convenient, honest and clean at the bottom of simple in structure, the cost, volume is little, in light weight, the operation of being convenient to go out such as carries at advantage, and its application can be increased work efficiency effectively and be produced good action effect.

Accompanying drawing is the electrical block diagram of the utility model design apparatus.Be described further and provide embodiment below in conjunction with accompanying drawing.

This device is by electromagnetic inductive probe and electromagnetic induction coil, direct supply,, two two-stage signal amplifying circuits, mixes oscillator-amplification circuit, and luminotron, self coupling oscillator, buzzer and musical film and illuminating lamp connect to form through circuitry lines.

Referring to accompanying drawing, at input end, electromagnetic induction signal enters first order signal amplifier BG by electromagnetic inductive probe N and electromagnetic induction coil L ₁, again by BG ₁Emitter is directly coupled to second level amplifier BG ₂Base stage, second utmost point amplifying signal is again by amplifier BG ₂Emitting stage through resistance R ₃Be coupled to the 3rd utmost point and mix vibration amplifier stage BG ₃Base stage; Electromagnetic inductive probe N can be a kind of push type probe that can stretch, it and sampling resistor R ₁L is connected with electromagnetic induction coil; The magnetic induction coil L of input end is the induced signal receiving sensitivity that is used for improving magnetic field; Resistance R ₁Also be when preventing test low pressure, human body touches energized conductor and the insulation resistance that is provided with because of carelessness; E is the driving power of this device, and the No.5 cell that available two joints are 1.5 volts substitutes; The two-stage signal amplifying circuit is by amplifier BG ₁, resistance R ₁, capacitor C ₁With amplifier BG ₂Form; The third level in the circuit structure is promptly by resistance R ₃, amplifier BG ₃, BG ₄, capacitor C ₂And resistance R ₄When working, can connect luminotron LE and driving by amplifier BG Deng the monofier of forming ₅, resistance R ₅, capacitor C ₃The self coupling oscillator of forming with input transformer B also makes buzzer HS sounding.K in the circuit ₁Be power switch; K ₂Be detector switch, can this switch be whether detection electroscope itself is normal, the switch that work; Microswitch K ₃Be the starting switch of additional musical film S, microswitch K ₄Control fill light lamp D; Input transformer B can substitute with the input transformer of micro-type receiver, wherein T ₁Be 350 circles, T ₂And T ₃Being 25 circles gets final product; Full machine is the about 20～30mA of power consumption in use; This electroscope should be checked the local battery situation earlier in use, turns on the power switch K ₁, press detector switch K ₂, this machine should have sound and light alarm, illustrates that electroscope is normal, can carry out electrical verification, when electrical verification finishes, and should be with power switch K ₁Close.When using this machine examination to test high pressure, the user can hold casing and contact sonde, gets final product near energized conductor.The distance of handing to general station electroscope test electric wire can be: 220～400 volts of about 2～5cm of scope; About 80～the 120cm of 6～10KV; About 400～the 750cm of 35～110KV.Electrical verification is relevant with the earth humidity apart from far and near, and wetter electrical verification distance is far away.

Claims

1, a kind of contactless high and low pressure electroscope is characterized in that it is a kind of non-contact type high and low pressure sound and light alarm electroscope that is connected to form by electromagnetic inductive probe, electromagnetic induction coil, DC source, two-stage signal amplifying circuit, mixing oscillator-amplification circuit, luminotron, self coupling oscillator, hummer and musical film and illuminating lamp.

2, contactless high and low pressure electroscope according to claim 1, the electromagnetic inductive probe N that it is characterized in that it can be a kind of pusher probes, it and sampling resistor R ₁L is connected with electromagnetic induction coil; Said two-stage signal amplifying circuit is by amplifier BG ₁, R ₁, C ₁And BG ₂Form; Mixing oscillator-amplification circuit is by resistance R ₃, amplifier BG ₃, BG ₄, capacitor C ₂And resistance R ₄Connect to form; By amplifier BG ₅, resistance R ₅, capacitor C ₃, the self coupling oscillator that connects to form of input transformer B is connected with buzzer HS with luminotron LE and by microswitch K ₃And K ₄Be connected with illuminating lamp D with musical film S.