CN2216253Y - Multicored cable core order and fault detector - Google Patents

Abstract

The utility model discloses an instrument for detecting of the corresponding lines sequence of the both ends of a multiple conductor cable and breaking and short circuit faults. The instrument is based on the two-engine serial communication of a microprocessor. A transmitter controls a group of simulating electronic switches and transmits sequence numbers which are different from each other at different time. A receiver detects the sequence numbers transmitted by the transmitter by controlling the corresponding simulating electronic switches. Thereby, the utility model determines the corresponding relation of the lines sequence and the breaking and short circuit faults in accordance with the received codes.

Description

Multicored cable core order and fault detector

The utility model relate to a kind of detect the corresponding line preface of multiple conductor cable and open circuit, the instrument of short trouble.

The cable that lays or overhaul in electric power, the communications field usually is that a lot of wires form a multi-thread bundle, and the two ends apart from each other.It is that an end electric wire and which wire of the other end belong to same that the color of general electric wire commonly used is distinguished the line preface.But the identical or extremely close electric wire of color is arranged when the line number is a lot of unavoidably, cause to distinguish the line preface.Because of the two ends apart from each other powerless again with multimeter.Also exist some line to open circuit when sometimes particularly overhauling cable simultaneously or the situation of short-circuit between conductors.Traditional detection method be with two telephone sets at every turn with the butt joint of two lines, the supervisory personnel is from the both sides call, if can the session description two ends connecting is with a pair of electric wire, otherwise illustrate the line preface not to or have an open circuit fault.

Cable laying or maintenance belong to site work, usually carry out in curbside, underdrain, skyscraper, and whenever finding out single line when detecting with telephone set needs to sound out repeatedly repeatedly, calling repeatedly, and work efficiency is extremely low, sometimes even can't carry out.

The purpose of this utility model is at above-mentioned shortcoming, design and Implement a kind of testing tool of microprocessor control, once can detect 50 wires (also can conveniently expand), can obtain the line preface of institute's live wire and the short-circuit conditions that opens circuit, and show with digital timesharing.

Main points of the present utility model are to use microprocessor two-shipper serial communication technology, transmitter is all linked to each other with connection terminal by multiway analog switch with receiver, only allows a certain serial number of transmitter to arrive a certain connection terminal of receiver through analog switch and cable under test constantly at each; Receiver is then opened multiway analog switch successively and is detected the serial number of being sent here by transmitter on each connection terminal, thus determine multiple conductor cable line preface and open circuit, short-circuit conditions.

The physical circuit of this technical scheme of enforcement as shown in drawings, accompanying drawing 1 is a whole instrument circuit block diagram, accompanying drawing 2 is instrument panel figure, accompanying drawing 3, accompanying drawing 4 are respectively the circuit diagram of transmitter and receiver, their circuit is basic identical, mainly is made up of microprocessor system, switch controlling signal circuit, multiway analog switch, connection terminal etc.Microprocessor system is promptly by single-chip microcomputer 8031, and latch 373 and memory 2716 are formed, crystal oscillator Crystal 12MHZ, and capacitor C 1, C2 get 20P; The switch controlling signal circuit is made up of two GAL16V8 and two latchs 273, and 16V8-1 produces switch controlling signal, transmits the graphemic code of display digit, and 16V8-2 plays decoding action.Latch 273-1,273-2 latch the switch controlling signal of preceding 40 lines of connection terminal, back 10 lines respectively, and 273-3 latchs the graphemic code of display digit to 273-6, and the genus display circuit has only receiver that this part circuit is just arranged.LED1-LED4 is 4 common cathode charactron LTS547R, R14-R41 is 28 current-limiting resistances, get 62 Ω, adopt P24-P27 to make address decoding, the generation address space be 0000h, 1000h ..., F000h, wherein B000h does not translate later on, and address 7000h shows that to the A000h correspondence 273-3 on road is to the 273-6 latch.0000h is to promptly 6 4051 and 1 4066 of the corresponding successively seven groups of analog switches of 6000h.When 8031 FO saltus steps when 0000h arrives the 5000h write data, data are latched by 273-1 after the 16V8-1 conversion, at this moment F6F7=01 guarantees that 16V8-1 chooses a certain line in 40 lines by preceding 5 4051 line characteristics alteration switch control signal, when the 6000h write data, after the 16V8-2 conversion, latch by 273-2, at this moment F6F7=10 guarantees that 16V8-1 chooses a certain line in 10 lines of back by the line characteristics alteration switch control signal of 4051-6 and 4066.The switch controlling signal that CPU sends can only be 01 and ring shift sign indicating number 02,04 ..., 80 totally 8 kinds, consider that again address 0000h divides seven groups to 6000h decoding, so be enough to distinguish 50 lines.As choose connection terminal No. 35, and because of 35=8 * 4+3, getting final product to 4000h output 08, design also is software programming for convenience like this.To 7000h during to the A000h write data F2 produce skip signal respectively to F5, at this moment F6F7=11 guarantees that 16V8-1 does not add any conversion directly by the latches of 273-3 to one of 273-6 with the numeric word font code; TK1, C3 and R3 form reset circuit, TK1 promptly moves key, C3 gets 47u, R3 gets 15K, R1 and D1 form the detection of having only transmitter just the to have indicating circuit that finishes, be that transmitter receives that detection that receiver is sent here finishes behind the signal, 8031 TO end produces pulse signal, and to drive green luminotron D1 glittering, desirable 200 Ω of R1 current limliting; R2 and D2 form power indicating circuit, and the R2 current limliting is got 620 Ω; XOR gate 386 and respective keys TK2, TK3, resistance R 4-R7, capacitor C 4, C5 form interruption pulse and produce circuit, the desirable 5.1K of R4-R7, C4, C5 get 4700P, and TK2 is a display key in receiver, connect this key and show testing result, TK3 is the contact key in transmitter, send liaison code elsewhere by the sign indicating number that stops to send sequence number of send opportunity behind this key, interrogator-receiver unit detections that whether finish, TK3 in receiver for getting in touch with key, with the detection signalisation transmitter that finishes, TK3 does not use in transmitter by this key; Triode T1, T2 and resistance R 8-R13 form the two paths of signals amplifying circuit, the flow direction of signal is relative in transmitter and receiver, what constitute that one-way switch transmits by 4066-C3 is detection that receiver the is issued transmitter notification signal that finishes, be designated as RT, 4051 and 4066-C1, C2 channeling analog switch transmit is that transmitter is passed to the serial number of receiver or the request recall signal whether detection finishes, be designated as TR, transmit detect the connection terminal of notification signal that finishes and directly link to each other with No. 1 connection terminal in the multi-way switch.General cable all has the different electric wire of a Gent, and very easily identification often links to each other this root line with No. 1 connection terminal of receiver, transmitter, and this root broken string possibility is very little, guarantees to get in touch with and normally carries out.The instrument rough schematic view that comprises transmitter, receiver as shown in Figure 1, multi-way switch 1,2 refers to C1, the C2 in 4051 and 4066 in the accompanying drawing 3,4, one- way switch 3,4 refers to 4066 C3 switch, switch controlling signal 5,6 refers to the 16V8-1,2 and 273-1,2 in the accompanying drawings 3,4, T1, T2 refer to the signal amplification circuit among Fig. 3,4 respectively, 7,8 refer to receiver and transmitter microprocessor system respectively, transmit the external connection terminal that detects the signal that finishes and link to each other respectively with R01, T01.

If receiver receives serial number 01 from the R01 terminal, receive serial number 36 from the R02 terminal, receive a invalid value outside the 01-50 from the R03 terminal, R04, R05 always receive mutually same code value 18 or the like, can conclude so: R01 and T01, R02 and T36 electric wire that two ends connect belong to same wire respectively, and electric wire that R03 connects opens circuit, R04, wire short-circuiting that R05 connects.Receiver may show below the result so:

01 01

02 02

03 HH

04 18

……

50 20

The sequence number of the same wire opposite ends of each group expression, HH represents to open circuit, and sees that from the receiver angle 03 line opens circuit; See that from the transmitter angle sequence number electric wire that corresponding wiring terminal connects that does not have to occur opens circuit, meeting two wire short circuits sometimes must have a certain sequence number of transmitting terminal this not to occur to belong to short circuit.The a plurality of terminals of receiver receive identical sequence number and show that short trouble is arranged.

Guidance panel is arranged shown in Figure of description 2: connect behind the line by operation key 2 working procedures: receiver 10 upper right portion are with the group of four figures 6,7,8,9 show corresponding line preface, two 6,7 on the left side shows transmitter wire size, two 8 on the right, 9 show the receiver wire sizes, below 1 be red power light.Receiver 10 detects the back that finishes and notifies the green indicating lamp 5 glittering expressions detections of transmitters 11, transmitter 11 to finish by contact key 4.Transmitter 11 stops the sign indicating number that sends sequence number after getting in touch with key 4, send the request recall signal whether detection finishes elsewhere, and whether interrogator-receiver unit 10 is checked and finished.

The actual use shows that this instrument is tested 50 line cables, can draw test result less than two minutes, and be accurately convenient, when cable reaches 500 meters, still can work reliably.

Claims (1)

1, a kind of detect multiple conductor cable line preface and open circuit, the instrument of short trouble, it is characterized in that: it is made up of a transmitter and a receiver, transmitter has the microprocessor (8) of the sign indicating number that can send sequence number successively, and the serial delivery outlet (TXDT) of microprocessor connects with connection terminal (T01-T50) by a multiway analog switch (2); Receiver has one group of connection terminal (R01-R50) that matches with transmitter connection terminal (T01-T50), and connection terminal (R01-R50) connects with the serial input port (RXDR) that can accept the microprocessor (7) of serial number by a multiway analog switch (1).

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