CN201373901Y

CN201373901Y - Cable tester

Info

Publication number: CN201373901Y
Application number: CN200920095698U
Authority: CN
Inventors: 陈育新
Original assignee: Tianjin Centre Advanced Tech Co Ltd
Current assignee: Tianjin Centre Advanced Tech Co Ltd
Priority date: 2009-02-27
Filing date: 2009-02-27
Publication date: 2009-12-30
Anticipated expiration: 2019-02-27

Abstract

The utility model relates to a cable tester. A circuit consists of a ripple testing circuit, a single-chip microcomputer control digital tube display and a high-voltage relay connecting circuit, a channel of a test ripple wave is controlled by controlling the connection and disconnection of a relay; the ripple testing circuit part is provided with a high voltage module, an output end is connected with a filtering device and the relay, connected with another filtering device after passing through the high voltage cable, and then connected with a load, and two filtering devices are respectively and correspondingly connected with a test point; parts of the single-chip microcomputer control digital tube display and the high-voltage relay, connected with the circuit, are provided with the high voltage modules which are connected with an A/D sampling module; and the A/D sampling module is connected with a single-chip microcomputer which is respectively connected with a digital tube display, a temperature sensor, a six-way switch and a six-way relay, wherein the six-way switch is correspondingly connected with the six-way relay. The tester can test 6 groups of ripple waves and one group of current, and can test the core wire temperature change of the cable when working under limited current of 10mA, thus being convenient and fast in application.

Description

Cable tester

Technical field

The utility model relates to a kind of tester, particularly a kind of cable tester.

Background technology

At present, cable fault tester on sale on the market is can pass through the ripple of test through cable again at receiving inspection but but there is not instrument, and cable has problem or the problematic instrumentation of the instrument that is connected in convenient simple and direct judging; Therefore, providing a kind of and integrate check and test, and provide the cable tester of multi-channel detection simultaneously, will be one of important topic of developing of those skilled in the art.

The utility model content

The purpose of this utility model is to overcome above-mentioned weak point, and a kind of simple in structure, reasonable in design, dependable performance, cable tester easy to detect are provided.

The technical scheme that the utility model adopted is for achieving the above object: a kind of cable tester comprises test circuit; It is characterized in that this circuit is shown by ripple test circuit and Single-chip Controlling charactron and the high-voltage relay connecting circuit is formed, test the passage of ripple by the break-make control of pilot relay; Described ripple test circuit part is provided with high-pressure modular, and output terminal connects filtering device, and output terminal also is connected with relay, through connecting another filtering device behind the high-tension cable, then connects load, and two filter spare is corresponding respectively to be connected with test point; Described Single-chip Controlling charactron shows and the high-voltage relay connecting circuit partly is provided with high-pressure modular, and described high-pressure modular is connected with the A/D sampling module, and the A/D sampling module is connected with single-chip microcomputer; Described single-chip microcomputer is connected with charactron demonstration, temperature sensor, 6 way switch, No. 6 relays respectively, and the corresponding connection with No. 6 relays of 6 way switch.

The beneficial effects of the utility model are: this cable tester can be tested 6 groups of ripples and 1 group of electric current, the heart yearn temperature variation of energy test cable under limiting current 10mA work, energy display voltage 0～3000V, test cable is changing through the ripple under the 3000V voltage, this instrument provides test heart yearn resistance, screen layer resistance and the withstand voltage interface of test cable 5000V, this cable tester has dependable performance, and is practical, easy to use.This instrument integrates check and tests, and multi-channel detection is provided, and uses convenient and swift.

Description of drawings

Fig. 1 is the utility model ripple test circuit part module connection side block diagram;

Fig. 2 is that the utility model Single-chip Controlling charactron shows and high-voltage relay circuit module connection side block diagram;

Fig. 3 is the utility model applying detection step block scheme.

Embodiment

Below in conjunction with accompanying drawing and preferred embodiment, details are as follows to embodiment, feature that foundation the utility model provides:

As shown in Figure 1-Figure 3, a kind of cable tester comprises test circuit; It is characterized in that this circuit is shown by ripple test circuit and Single-chip Controlling charactron and high-voltage relay connecting circuit two parts are formed, test the passage of ripple by the break-make control of pilot relay.

As shown in Figure 1, described ripple test circuit part is provided with high-pressure modular, and high-pressure modular connects load, output terminal connects filtering device, and output terminal also is connected with relay, through connecting another filtering device behind the high-tension cable, then connect load, two filter spare is corresponding respectively to be connected with test point.

As shown in Figure 2, described Single-chip Controlling charactron shows and the high-voltage relay connecting circuit partly is provided with high-pressure modular, and described high-pressure modular is connected with the A/D sampling module, and the A/D sampling module is connected with single-chip microcomputer; Described single-chip microcomputer is connected with charactron demonstration, temperature sensor, 6 way switch, No. 6 relays respectively, and the corresponding connection with No. 6 relays of 6 way switch.

As shown in Figure 3, it is as follows to detect steps in sequence: system initialization, and relay all disconnects, and the scanning switch state according to the on off state pilot relay, calls display subroutine, returns.

It is PIC18F4520 that described single-chip microcomputer adopts model.

The application operating step:

(1) test ripple

Earlier (I～VI) connects cable in the back of instrument, the line of connecting with the mains, turn on the power switch, open ripple switch, open K1, corresponding pilot lamp is bright, and regulator potentiometer makes voltage rise to 3000V, (discharge is used digital oscilloscope (ripple is an effective value) or milivoltmeter herein again at ripple test point test ripple to ripple test point) examination tests regulator potentiometer voltage is transferred to 0V, open K1, open K2, corresponding pilot lamp is bright, regulator potentiometer, make voltage rise to 3000V, earlier the discharge of ripple test point is tested ripple with digital oscilloscope or milivoltmeter at ripple test point again, test regulator potentiometer voltage is transferred to 0V.Other passage is analogized.

(2) measuring current

Clear affirmation ripple switch, K1, K2, K3, K4, K5, K6 disconnect before the test, and voltage is shown as 0000.

Earlier connect cable in the back of instrument (VII), the line of connecting with the mains at reometer and GND termination multimeter, is opened current switch, and charactron can show the temperature of heart yearn always.If do not have cable then the interior environment temperature of display instrument.

(3) test is withstand voltage

PLSCONFM power switch, ripple switch, current switch, K1, K2, K3, K4, K5, K6 disconnect before the test.

Hi-pot Tester is provided with voltage 5000V, leakage current 15uA, use special-purpose interface to be connected to (one on the left side in two interfaces of I～VI), front of cable tester, the high-voltage output end of Hi-pot Tester connects supporting interface, ground is connected with the connection terminal on interface next door, tests test point is discharged.

(4) test heart yearn resistance

Use 6 1/2 multi-usage tables of numeral, two test pencils are connected to the front of cable tester, and (two interfaces of I～VI), reading is resistance value.

(5) test screen layer resistance

PLSCONFM power switch before the test, ripple switch, current switch, K1, K2, K3, K4, K5, K6 disconnect.

Use 6 1/2 multi-usage tables of numeral, two test pencils are connected to the front of cable tester, and (connection terminal on interface next door of I～VI), reading is resistance value.

The same time can only be tested a kind of function, forbids testing simultaneously two or more functions.

Technique effect of the present utility model:

(1) test cable changes through the ripple of 3000V voltage.

(2) provide the interface of test cable limiting current 10mA, and can show and be operated in heart yearn temperature variation under the limiting current, 1 passage.

(3) provide test 5000V withstand voltage interface, 6 passages.

(4) provide the interface of test cable heart yearn resistance, 6 passages.

(5) provide the interface of test cable screen layer resistance, 6 passages.

Technical characterstic of the present utility model:

(1) this instrument integrates check and tests, not only can be at receiving inspection but also can be by the ripple of test cable, and conveniently succinct judge cable and whether have problems the instrument existing problems that still connected.

(2) can carry out multiple channel test, inner Single-chip Controlling high-voltage relay, and can be high pressure resistant, as the voltage-withstand test interface.

(3) make things convenient for the heart yearn resistance and the screen layer resistance of test cable.

Above-mentioned with reference to embodiment to the detailed description that this cable tester carries out, be illustrative rather than determinate, therefore, should belong within the protection domain of the present utility model in the variation and the modification that do not break away under the utility model general plotting.

Claims

1, a kind of cable tester comprises test circuit; It is characterized in that this circuit is shown by ripple test circuit and Single-chip Controlling charactron and the high-voltage relay connecting circuit is formed, test the passage of ripple by the break-make control of pilot relay; Described ripple test circuit part is provided with high-pressure modular, and output terminal connects filtering device, and output terminal also is connected with relay, through connecting another filtering device behind the high-tension cable, then connects load, and two filter spare is corresponding respectively to be connected with test point; Described Single-chip Controlling charactron shows and the high-voltage relay connecting circuit partly is provided with high-pressure modular, and described high-pressure modular is connected with the A/D sampling module, and the A/D sampling module is connected with single-chip microcomputer; Described single-chip microcomputer is connected with charactron demonstration, temperature sensor, 6 way switch, No. 6 relays respectively, and the corresponding connection with No. 6 relays of 6 way switch.

2, cable tester according to claim 1 is characterized in that it is PIC18F4520 that described single-chip microcomputer adopts model.