CN2050982U - Multifunctional electronic electric-tester - Google Patents

Abstract

The utility model relates to a signal device, particularly a multifunctional electronic electric-tester, which takes batteries as a power source, and takes a spot light bulb or a buzzer as a signal display device. In the insulating case, the utility model can utilize a sensitive electrical signal sensing device to receive electric signals and then amplify and output the signals, so the breakpoint position of a core wire of a supply line can be displayed by the signals. In this way, the utility model can conduct alarm with super high pressure in a long distance, and detect whether the shell of an electrical device has poor earthing or leakage; a provided plug cord with two cores can be used for judging the on-off state of circuits of the electrical device, and can also conduct emergency lighting during the circuit detection.

Description

multifunctional electronic electric-tester

The utility model relates to a kind of telltale, particularly the multifunction electronic electricity measurer.

Whether people are charged for the lead or the object that detect some electric equipment, test pencil commonly used, but when using this instrument, the tip of the brushstyle of a writing or painting directly must be contacted just and can measure with electrified body, whether fracture if detect the heart yearn that has rubber or plastic skin lead, common test pencil is just powerless.For this reason, people work out a kind of contact inductive electric pen, but this electroprobe is by large-area metal object, sense the electric field that exists around the electrical conductor, then amplify output signal, this electricity measurer, faint because of induction current, generally being used for luminous signal apparatus is to adopt light emitting diode or liquid crystal display, is difficult for seeing clearly under high light, though be contactless checkout equipment, but its sensing probe is a metallic conductor, still has unsafe factor when detecting electrified body, when running into stranded conductor and detect, be difficult in time find disconnected core position, have to check with multimeter earlier, see which root line has broken, so use inconvenience.

The purpose of this utility model is that a kind of improved electricity measurer will be provided, and its signal is clear, is not contacting under the electric conductor situation, can safety whether predict this object charged; Can find the breakpoint location of non-nuditing wire and the break-make in loop rapidly.

The purpose of this utility model is achieved in that utilizes high input impedance, great dynamic range, Ling Min electric signal sensor spare extremely, as signal receiver, receive electric signal, as amplifying signal equipment, signal is amplified, exports with integrated operational amplifier, to account for type Spot light bulb or hummer, show the breakpoint location of supply line as signal apparatus; In circuit, be provided with the two core plug jack in addition, be connected with display device, to judge the break-make of electric equipment circuit with same amplifying device.

The concrete structure of utility model is provided by following examples and accompanying drawing thereof:

Fig. 1: the utility model circuit diagram

Fig. 2: the utility model back side inner member assembling synoptic diagram

Fig. 3: install synoptic diagram on the shell of the utility model front

Describe concrete device details of the present utility model and working condition in detail below in conjunction with accompanying drawing.

This device is that power supply E, signal apparatus Z are housed in plastics system shell _L, signal receiver G ₁, signal amplifying apparatus G ₃, outgoing control class G ₄, Test Switchboard K ₁, light switch K ₂With the 2.5mm two core plug jack J that is positioned at the shell side _CKAs the high input impedance of signal receiver, great dynamic range, extremely sensitive signal transducer G ₁, be positioned at one of side electrical equipment angle, promptly, on this place's shell, draw underlined as the test lead 1 of electricity measurer.During test, connect Test Switchboard K ₁, with test lead 1 close conductor, when conductor has the power frequency electricity, then by signal transducer G ₁Receive signal, this signal is through the integrated operational amplifier G as signal amplifying apparatus ₃After amplifying conversion, outgoing control class G ₄To fully loaded, impel the type that accounts for Spot light bulb Z from zero load as 2.5～3V of wigwag display device _LFrom the specified bright change that do not work, thus the existence of measuring electrical signal of reaction, when test lead advances near phase line end lead, light has gone out, this place is breakpoint, otherwise, when test lead closely the line end lead advance, when light brightened by not working, this place also was a breakpoint.

In measuring electric equipment during the break-make of lead, Test Switchboard K ₁Still locate closed circuit state, with two core plug jack J _CK, plug two core plug, between plug cord, connect the two ends that desire is surveyed lead, as lead just often, then two core plug amplifies the 3DG201 triode G of usefulness with conduct thereafter ₂Connect, export a signal through integrated operational amplifier G ₃After amplifying conversion, through outgoing control class G ₄, make to account for type Spot light bulb Z _LLight, otherwise as not making it luminous, promptly the explanation lead that detects interrupts.

When with this electricity measurer illumination, Test Switchboard K ₁Motionless, still locate open-circuit condition, connect K switch ₂, make power supply E and Spot light bulb Z _LBetween have the loop of one's own, signal lamp is bright, can work as the electric torch emergency lighting and use.

Each electric elements selects for use specifications and models as follows in the present embodiment:

R ₁: 150 Ω, 1/8W, RTX carbon resistance film

R ₂: 200 Ω, 1/8W, RTX carbon resistance film

R ₃: 22K, 1/8W, RTX carbon resistance film

G ₁: MOS compound tube VCR7N signal transducer

G ₂: the 3DG201 triode

G ₃: μ PC1017G integrated operational amplifier

J _CK: 2.5mm two core sockets

G ₄: the 3CX204 triode

E: two joint No.5 cells

The utility model has following characteristics:

1, function is many: can completely cut off insulator and distinguish whether conductor is charged, can search supply line's breakpoint location, can judge the break-make in electric equipment loop, in the same way can be in not contact situation the detecting electric device housings have or not electric leakage and ground connection whether good, remote super-pressure approaches warns and the emergency lighting when checking circuit.

2, safe, practical, convenient: whole electricity measurer shell does not have metal probe, even be perfectly safe in contact electrification conductor situation yet. Moulding is small and exquisite, carries, easy to use, and the electrician is operation in the ordinary course of things, can carry universal meter, test pencil, flashlight etc., and this capacitor just can be competent at.

3, applied widely: each electrician of factories and miness enterprises and institutions, the applied to power supply substation worker, film, TV, video recording broadcast person, electrical equipment repairman, electrophile are all applicable, are electrician author's competent assistants.

Claims (1)

1, a kind of telltale, particularly multifunction electronic electricity measurer include power supply, signal apparatus, signal receiver, signal amplifying apparatus and electric switch in this device, it is characterized in that:

(1) adopt high input impedance, great dynamic range, extremely sensitive electric signal sensor spare as signal receiver;

(2) adopt integrated operational amplifier as signal amplifying apparatus;

(3) adopt and to account for type Spot light bulb or hummer as signal apparatus;

(4) in circuit, be provided with the two core plug jack of judging loop break-make in the electric equipment.

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