CN2071791U

CN2071791U - Electric cable and wire tester

Info

Publication number: CN2071791U
Application number: CN 90209655
Authority: CN
Inventors: 林哲生
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-07-02
Filing date: 1990-07-02
Publication date: 1991-02-20

Abstract

The utility model relates to an electric cable and wire tester used for detecting the broken wire and the mixed wire, mainly solving the problem that the position of the broken wire and the mixed wire are hard to detect when the wire-breaking and the wire-mixing fault of the cable and the electric wire are detected; besides, the problem that the segment detection is caused to be performed and the cable and the electric wire are wasted, are solved. The solution of the utility model is that the demodulation and the amplifying functions are utilized, an oscillating circuit is caused to operate through a metallic probe in order to display the circuit fault by impelling the light emitting diode and a loud speaker, and the metallic probe A which adopts the sheet metal is fabricated to a right angle whose area is 30 mm*40 mm. The utility model connected with the base number of the BG detects the signal by utilizing the capacitor arranged between the probe and the electric wire.

Description

Electric cable and wire tester

The utility model relates to cable and wire burn out detection instrument.

Detect for electrical equipment and power circuit disconnection fault in the prior art, generally all adopt multimeter or test pencil apparatus, but for bag core electric wire or cable, then can't detect the position of broken string and swinging cross exactly, particularly rubber bag core cable is in case broken string occurs, common inspection method is that inspection is cut off in segmentation, and this method makes the cable waste greatly, but also has incured loss through delay work.

The purpose of this utility model provides a kind of probe cable electric wire detector, and it can detect broken string exactly and whether the position and the electrical device of swinging cross leaks electricity, and when near high voltage, can trigger warning.

Whether the utility model is by a metal probe, utilizes the detection amplification of triode, impels oscillatory circuit work, come display circuit to exist fault to realize to promote luminotron and loudspeaker.And by metal probe A, triode BG ₁, BG ₂Form detection, amplification, on-off circuit, by triode BG ₃, BG ₄, capacitor C ₁, diode D ₁Form complementary oscillatory circuit.Metal probe is made flat square with foil, and it is connected in BG ₁Base stage, utilize probe to examine and pick up signal, triode BG with the electric capacity between electric wire ₁And BG ₂Collector is parallel to electronic switch K, BG ₁Emitter be connected in BG ₂Base stage, BG ₂Emitter be connected in BG ₃Base stage and BG ₄Emitter, capacitor C ₁One end is connected in BG ₃Base stage, the other end is connected in BG ₄Collector, red light emitting diodes D ₁Positive pole be connected in BG ₄Collector, negative pole is connected in power cathode, capacitor C ₂Positive pole is connected in BG ₄Collector, negative pole connects receiver J-Horner, green LED D ₂Positive pole connect resistance R to positive source, minus earth.

Cable and wire detector described in the utility model through evidence, can accurately be indicated the guilty culprit of cable or electric wire, rate of accuracy reached 100%.

Further use description of drawings structure of the present utility model and embodiment below.Accompanying drawing 1 is a cable and wire detector structural drawing, (1) detector shell among the figure, (2) power switch K, (3) red luminotron D ₁, (4) green luminotron D ₂, (5) receiver J-Horner, (6) metal probe A makes the flat sided straight dihedral of area more than 30 * 40mm with foil; Accompanying drawing 2 is cable and wire detector circuit theory diagrams, when the probe A inspection is picked up power frequency component by BG ₁After detection is amplified, be added in BG by emitter output ₂Base stage because BG ₂Be NPN type switching tube, base voltage is during to 0.7V, promptly fullly closes conducting, this moment BG ₃Base voltage equal zero, along with capacitor C ₁Charging, BG ₃Base voltage when progressively being increased to 0.5V, BG ₃The beginning conducting, BG ₄Voltage also raise BG simultaneously ₄Conducting, red luminotron D ₁Luminous position with indication cable and wire broken string or swinging cross, earphone is also through C simultaneously ₂Discharge and recharge and sounding.In case the probe A loss signal, BG ₁End BG at once ₂Close simultaneously, oscillatory circuit loses power supply, quits work, and has only green luminotron D this moment ₂Shinny.

The utility model is simple in structure, and is easy to use, for the detection streamer cable malfunction provides a kind of effective testing tool.

Claims

A kind of detector that is applicable to the cable and wire fault is by a metal probe A, triode BG ₁, BG ₂Form detection, amplification, on-off circuit, triode BG ₃, BG ₄, capacitor C ₁, diode D ₁The complementary oscillatory circuit of forming, metal probe A receives power frequency component, trigger electronic switch K through amplifying, for oscillation circuit power, thereby promote the position of luminotron and loudspeaker check circuit event, it is characterized in that metal probe A makes flat square with foil, the one transverse plane is connected in triode BG ₁Radix, triode BG ₁And BG ₂Collector is connected in electronic switch K, BG ₁Emitter be connected in BG ₂Base stage, BG ₂Emitter be connected in BG ₃Base stage and BG ₄Emitter, capacitor C ₁One end connects BG ₃Base stage, the other end is connected in BG ₄Collector, red light emitting diodes D ₁Positive pole be connected in BG ₄Collector, negative pole is connected in power cathode, capacitor C ₂Positive pole is connected in BG ₄Collector, negative pole connects receiver J-Horner, green LED D ₂Positive pole connect resistance R to positive source, minus earth.