CN101071158A

CN101071158A - Relay test method for on-line testing instrument

Info

Publication number: CN101071158A
Application number: CN 200610076599
Authority: CN
Inventors: 王永静; 傅佳芳; 刘彬; 段靖荒; 廖继红; 鹿祥宾
Original assignee: ZTE Corp
Current assignee: State Grid Shanghai Electric Power Co Ltd
Priority date: 2006-05-08
Filing date: 2006-05-08
Publication date: 2007-11-14
Anticipated expiration: 2026-05-08
Also published as: CN100568009C

Abstract

This invention discloses an online Meter Relay testing method, including the following steps: the establishment of the redundancy tested Relay access, namely the establishment of a number of pathways, in addition to the measured relay, the relay through each pathway are totally different. Under the circumstances the relay damaged in one pathway, another pathway formed closed-loop, continue to test. The invention method used at least two relays because of a closed-loop access, to test. Iif the two access roads are in good condition and do not affect the judgment of the measured relay, even though one access road has problems, another pathway can still guarantee test loop . Compared with the existing technology, the invention has been greatly reduced wrong judgment because of the other relay pathway damage, can rapidly and accurately positioning of Relay, and reduce the time to maintain DRC card relay.

Description

A kind of online Meter Relay testing method

Technical field

The present invention relates to a kind of method of testing of relay, belong to the tester field, in particular a kind of online Meter Relay multi-path method of testing.

Background technology

In the prior art, on-line testing also claims interior circuit test, i.e. ICT (IN CIRCUIT TEST is called for short ICT), be exactly to go up a kind of method of testing of under the situation that device is not lifted down device being tested at printing board PCB (PRINTED CIRCUIT BOARD is called for short PCB).

On-line testing can check that test speed is fast to veneer comprehensively, and localization of fault is accurate.According to type of device in the plate, on-line testing is divided into digital on-line testing and analog in-circuit testing again.The simulation test technology is an important measuring technology in the ICT test, is mainly used in the connection attribute (the logical short circuit of wiring etc.) of nonnumeric device such as analog device on the test printed circuit board, linear unit and test circuit network, also is used for hybrid test.

The important path of analog in-circuit testing is to be formed by the relay that drives on the receiving card DRC (DRIVER RECEIVERCARD is called for short DRC), and it is to important of DRC card self check in the on-line testing instrument that the relay on the DRC card is tested.

The self-checking that is divided into main relay and node relay is tested in on-line testing to DRC card relay.One 4000 on-line testing instrument comprises 2496 of main relays.The conventional method of traditional relay test is as follows: closure comprises measured relay and other relevant relay forms a test access, by simulation test card ATC (ANOLOG TEST CARD is called for short ATC) resistance of test loop or the open and close state that magnitude of voltage is judged relay.

The problem that adopts this method to exist is, in test loop, relevant relay generally has 3-5, if it is stuck as opening that other relay in the loop goes wrong, cause path can't form the closed-loop path, just directly have influence on the closure test of measured relay, can't be closed according to the judgement measured relay that test result can be wrong.And then in the relay test of whole plate, each measured relay has only a test access, because reporting an error of many irrelevant relays can appear in the error of certain relay in the path, causes correctly locating wrong relay.Because the relay on the DRC is a lot, can't solve the relay that goes wrong fast, the maintenance of location misarrangement is very big.

Therefore, there is defective in prior art, and awaits continuing to improve and development.

Summary of the invention

The objective of the invention is provides a kind of online Meter Relay testing method in order to overcome the shortcoming that many relays dependence test of the prior art can't accurately be located, and solves the problem to the measured relay error in judgement of causing that exists in the prior art.

Technical scheme of the present invention comprises:

A kind of online Meter Relay testing method, it may further comprise the steps:

A, set up the redundant via of measured relay, promptly set up many paths, except that measured relay, the relay of every path process is different fully;

B, have under the situation of relay damaged in a path therein, select other path to form the closed-loop path, proceed test.

Described method wherein, comprises that specifically step is as follows:

A1: closed tested relay;

B1: by the simulation test card these many relay circuits in parallel are carried out resistance test, judge the closed situation of relay according to test result;

C1: open tested relay;

D1: by the simulation test card these many relay circuits in parallel are carried out resistance test, judge the situation of opening of relay according to test result;

E1: all relays that resets, end of test (EOT).

Described method wherein, sticks into capable resistance test by simulation test among the described step B1, if the result, thinks that relay can be closed less than first threshold, otherwise thinks that relay opens stuck.

Described method wherein, sticks into capable resistance test by simulation test among the described step D1, if the result, thinks that relay can open greater than second threshold value, otherwise thinks that relay closes is stuck.

Described method, wherein, described first threshold is 4 ohm; Described second threshold value is 10K ohm.

A kind of online Meter Relay testing method provided by the present invention, owing to adopt at least two relay paths to form the closed-loop path, test, if two path is all intact, do not influence judgement to measured relay, even wherein a path has problem, an other path still can guarantee test loop, compared with prior art, what the inventive method had significantly reduced that damage owing to other relay in the path causes makes false judgment to measured relay, quick and precisely the orientation problem relay has been saved the time that DRC card relay is safeguarded in solution.

Description of drawings

Fig. 1 is the relay self check process flow diagram of the inventive method;

Fig. 2 is the distribution schematic diagram that the inventive method drives the relay of receiving card.

Embodiment

Be described in further detail below in conjunction with the enforcement of accompanying drawing technical scheme:

Online Meter Relay testing method of the present invention, as shown in Figure 1, it has proposed a kind of multi-path relay testing technique thought, that is: set up the redundant via of measured relay, promptly set up many paths, except that measured relay, the relay of every path process is different fully, have under the situation of relay damaged in a path therein, can select other path to form the closed-loop path.

The process of the inventive method busy relay is as follows:

The first step: closed tested relay;

Second step: set up two or more the closed-loop path comprise measured relay, wherein except that measured relay, other relays on the path are difference fully all;

The 3rd step: by the simulation test card these two relay circuits in parallel are carried out resistance test, according to the closed situation of test result judgement relay,

The 4th step: open tested relay;

The 5th step: by the simulation test card these two relay circuits in parallel are carried out resistance test, judge the situation of opening of relay according to test result;

The 6th step: all relays that resets, end of test (EOT).

Be the distribution schematic diagram of driving receiving card DRC relay of the present invention as shown in Figure 2, principle to the self check of relay is as follows: adopt the TISV pattern to test, wherein the E level is connected with simulation test card ATC with the F level, at the E pole excitation, the F utmost point is measured, resistance after the measurement calculates by driving voltage/electric current, and the standard that the judgement relay is in the open and close state is as follows:

Relay is opened measurement: when measured relay was in open mode, the resistance value of measurement should be greater than second threshold value 10K ohm, otherwise think that relay closes is stuck.

Relay closes is measured: when measured relay was in closure state, the resistance value of measurement should be less than 4 ohm of first thresholds, otherwise thought that relay opens stuck.

Be exemplified below: the process of measuring main relay K1 is as follows:

The first step: closed measured relay K1;

Second step: set up two loops between the E-F, except that measured relay K1, the relay on every loop is all different fully,

Loop 1 relay comprises: K1, and K2, K3, K4, K5, K6,

Loop 2 relays comprise: K1, K7, K8, K9, K10, K11;

The 3rd step: stick into capable resistance test by simulation test,, otherwise think that relay opens stuck if the result, thinks that relay can be closed less than first threshold;

The 4th step: open measured relay K1;

The 5th step: stick into capable resistance test by simulation test,, otherwise think that relay closes is stuck if the result, thinks that relay can open greater than second threshold value;

The 6th step: all relays reset.

If two the relay in the loop can both be closed, can accurately judge the quality of measured relay K1; If the relay K 2 in the loop 1, K3, K4, K5, the K6 existing problems can not be closed, can form the closed-loop path by loop 2; In like manner, if the existing problems of the relay in the loop 2 K7, K8, K9, K10, K11 can form the closed-loop path by loop 1, and both of these case can form the closed-loop path to measured relay K1, has improved the accuracy to the test of K1 relay greatly.

Although in conjunction with the accompanying drawings several specific embodiments of the method for the invention are described above; but this method is not limited to above-mentioned embodiment; above-mentioned embodiment only is schematic; rather than it is restrictive; those of ordinary skill in the art is under the enlightenment of this method; not breaking away under the scope situation that this method aim and claim protect, can also make a lot of distortion, these all should belong within the protection of the inventive method.

Claims

1, a kind of online Meter Relay testing method, it may further comprise the steps:

2, method according to claim 1 is characterized in that, comprises that specifically step is as follows:

A1: closed tested relay;

C1: open tested relay;

E1: all relays that resets, end of test (EOT).

3, method according to claim 2 is characterized in that, sticks into capable resistance test by simulation test among the described step B1, if the result, thinks that relay can be closed less than first threshold, otherwise thinks that relay opens stuck.

4, method according to claim 3 is characterized in that, sticks into capable resistance test by simulation test among the described step D1, if the result, thinks that relay can open greater than second threshold value, otherwise thinks that relay closes is stuck.

5, method according to claim 4 is characterized in that, described first threshold is 4 ohm; Described second threshold value is 10K ohm.