CN2586166Y

CN2586166Y - Intelligence fast line inspection instrument

Info

Publication number: CN2586166Y
Application number: CN 02258987
Authority: CN
Inventors: 杨一勤
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-11-28
Filing date: 2002-11-28
Publication date: 2003-11-12
Anticipated expiration: 2012-11-28

Abstract

The utility model relates to a line inspection instrument for rapidly and accurately detecting the fault of a multi-core cable, which is composed of a switching and scanning circuit, a constant current circuit, a CPU control detection circuit, a power supply circuit and a display circuit. When the utility model is in work process, one end of a calbe waiting to be detected is connected with a terminal box (the inner part of the terminal box is provided with a series resistor), and the other end is connected with the input terminal of the switching and scanning circuit. When the utility model carries out the detection, the CPU circuit sends out an instruction, and the switching and scanning circuit carries out scanning and switching and sends the signal back to the CPU circuit. After the signal is detected and analyzed by the CPU circuit, the treated data is sent to the display circuit. The display circuit displayes the corresponding wire size or the results of broken wire, short circuit, etc., and then the line inspection is completed.

Description

Intelligent quick wire searcher

Affiliated technical field

The utility model belongs to the electric variable measurement technical field, relates to a kind of wire searcher that is used for quick and precisely detecting the polycore cable fault.

Background technology

It is that relevant department feels one of problem that troubles for many years that the line inspection of electric wire or polycore cable fault detects always.Carried out electric wire or polycore cable check mark line inspection work needs two people at least in the past, during measurement, two people join intercom and lay respectively at the two ends of waiting to look into electric wire or cable, and with the logical lamp line inspection, promptly a people is at the end battery minus earth line of waiting to look into cable, positive pole connects a certain heart yearn of cable, with bulb one utmost point ground connection, another utmost point cable core of trying is when treating that lamp is bright at the cable other end for another people, tell the other side with intercom, carry out label.Such method efficient is very low, makes mistakes easily, and is not only time-consuming especially at electric wire or opening circuit appears in cable or during short trouble, and the serious waste manpower.

The utility model content

The purpose of this utility model is to overcome the problem that prior art exists, provide a kind of novel structure, easy to operate, can quick and precisely search the intelligent quick wire searcher of electric wire or polycore cable fault.

Technical solution for achieving the above object is such: the intelligent quick wire searcher that is provided is a kind of intelligent measuring device that utilizes the automatic switchover scanning technique, it is by the switched scan circuit, constant-current circuit, CPU control detection circuit, feed circuit and display circuit are formed, the multichannel input scan end of switched scan circuit connects with waiting each heart yearn of looking into polycore cable respectively, the scan control I/O end of switched scan circuit links to each other with the scan control output/input end of CPU control detection circuit, the signal input part of display circuit communicates with the corresponding output terminal of CPU control detection circuit, the output terminal of constant-current circuit is connected to the constant current input end of switched scan circuit and CPU control detection circuit respectively, and the corresponding output terminal of feed circuit is connected to the power input of above-mentioned each circuit.In the course of work, a termination terminal box (built-in resistance in series) of cable, the input end of another termination switched scan circuit will be waited to look into.During detection, send instruction by CPU control detection circuit, sweep circuit scans switching and signal is returned CPU control detection circuit, after detecting, analyze by cpu circuit, data processed is delivered to display circuit, demonstrate corresponding wire size or results such as broken string, short circuit by display circuit, finish the line inspection.

Compared with prior art, the utlity model has rational in infrastructure, cost is low, intelligent degree height, characteristics such as practical, it adopts the technical approach of automatic switchover sweep circuit and electronic surveying, saved the trouble of artificial wiring, but fast detecting also demonstrates result accurately, the cable that utilizes this wire searcher to look into one 19 core only needs the several seconds, moment finishes, no matter which root heart yearn of cable exists and opens circuit or short circuit all can come into plain view, there is not ground wire competent in the same old way yet, thereby than having improved efficient greatly with the mode of leading to the lamp line inspection in the past, a people gets final product the line inspection.

Description of drawings

Fig. 1 is the design concept block diagram of intelligent quick wire searcher described in the utility model.

Fig. 2～Fig. 4 is a practical circuit diagram that is used to detect the quick wire searcher structure of 19 core cables.Wherein Fig. 2 is for being that the circuit on line figure of CPU control detection circuit part, Fig. 3 are the circuit on line figure of switched scan circuit and constant-current circuit part, and Fig. 4 is the circuit on line figure of switched scan circuit and CPU control detection circuit interface circuit.

Embodiment

Referring to accompanying drawing, the main operating circuit of the described quick wire searcher of this example structure comprises CPU control detection circuit 5, switched scan circuit 2, constant-current circuit 3, feed circuit 6 and display circuit 6 etc.In the specific embodiment structure that Fig. 2～Fig. 4 provides, CPU control detection circuit 4 adopts the AT89C51 single-chip microcomputer, and it is the core of whole measuring instrument, is responsible for handling actual detected information, carries out control command.Switched scan circuit 2 is by the parallel array of forming (Fig. 3) of 20 NAIS-TX24 type relays, input end H1～the H20 of array inserts a heart yearn waiting to look into cable 1 respectively, and output terminal SK1～SK40 delivers to the D0～D7D port of AT89C51 single-chip microcomputer through interface circuit shown in Figure 4.Constant-current circuit 3 is made of triode DH2, and its output terminal is connected in switched scan circuit and the CPU control detection circuit simultaneously.Display circuit 6 is made of the device that many models are all TB3612.Feed circuit 4 adopt BYQ1 and stabilized voltage supply integrated circuit such as MC7805, MC7809, and it provides power supply for whole circuit.

Claims

A kind of intelligent quick wire searcher, it is characterized in that it is by switched scan circuit (2), constant-current circuit (3), CPU control detection circuit (5), feed circuit (4) and display circuit (6) are formed, the multichannel input scan end of switched scan circuit (2) connects with each heart yearn of polycore cable to be looked into (1) respectively, the scan control I/O end of switched scan circuit (2) links to each other with the scan control output/input end of CPU control detection circuit (4), the signal input part of display circuit (6) communicates with the corresponding output terminal of CPU control detection circuit (5), the output terminal of constant-current circuit (3) is connected to the constant current input end of switched scan circuit (2) and CPU control detection circuit (5) respectively, and the corresponding output terminal of feed circuit (4) is connected to the power input of above-mentioned each circuit.