CN102565616A - Circuit on-off rapid testing method on basis of bisection method - Google Patents

Abstract

The invention belongs to the field of electronic testing and particularly relates to a rapid testing method capable of rapidly testing the connection of a circuit. The invention provides a rapid testing method for testing the on-off condition of the circuit on the basis of a bisection method. Due to the adoption of the testing method provided by the invention, the testing speed can be improved. Particularly, the larger the number of the circuits to be tested is, the higher the efficiency of the method is. The testing time is shortened. According to the invention, the circuit with problems can be accurately positioned.

Description

Circuit on-off method for rapidly testing based on dichotomy

Technical field

The invention belongs to the Electronic Testing field, the method for rapidly testing that particularly a kind of measurement circuit fast connects.

Background technology

Traditional test all is to specify on one road p-wire to export signal, and acquired signal on other each drive test examination circuits is confirmed itself and the break-make situation of specifying that road p-wire; Change p-wire output signal then, repeat above engineering, have n road p-wire just to need test n-1 time; When if n is smaller, the number of times of test is not too many, and the speed difference of test is not obvious; When n was bigger, then testing time was excessive, and speed is too slow; And in loaded down with trivial details thread-changing process, the situation of test leakage appears easily, the check work after test leakage occurring is also cumbersome.

Summary of the invention

To above-mentioned technical matters; The present invention provides a kind of method for rapidly testing that is used for measurement circuit break-make situation based on dichotomy; Adopt method of testing of the present invention can improve the speed of test, particularly for the more tests of circuit number, the efficient of this method is high more; Shortened the test duration, the present invention can accurately locate in-problem circuit.

The present invention realizes through following technical scheme:

Circuit on-off method for rapidly testing based on dichotomy is characterized in that:

A) N is added up and be recorded as to the circuit number of needs being measured;

B) count N according to the circuit of measuring gained, calculate the number of times M that needs to feed signal, if N=2 ^X, if M=x then is 2 ^x＜N＜2 ^X+1, M=x+1 then;

C) the circuit number is carried out five equilibrium, if N=2 ^X, then, promptly successively circuit is carried out 2 with branches such as circuit M time ¹, 2 ²2 ^MIf five equilibrium is 2 ^x＜N＜2 ^X+1, then with 2 ^MThe bar circuit promptly carries out 2 with circuit successively as the circuit number of need five equilibrium ¹, 2 ²2 ^MFive equilibrium;

D) according to the five equilibrium number of times of confirming among the step c; Feed signal in the circuit after waiting branch successively, half circuit adds drive signal, and second half circuit adds sampled signal; And drive signal and sampled signal are for alternately to feed in the circuit; And after feeding signal, signal is carried out record,, confirm that then there are short circuit in this circuit and a certain circuit if in the circuit that feeds sampled signal, detected drive signal; And in follow-up test process, no longer feed drive signal, only this circuit is sampled to this circuit;

E) judge based on data recorded and confirm to have short circuit between those circuits.

Whether in sum, adopt method of testing of the present invention, can test out fast has short circuit phenomenon in the middle of the circuit, and can confirm accurately that those circuits have problems, and has improved the test speed whether multi-line exists short circuit, has shortened the test duration.

Embodiment

Do further elaboration in the face of the present invention down:

Based on the circuit on-off method for rapidly testing of dichotomy,

A) N is added up and be recorded as to the circuit number of needs being measured;

B) count N according to the circuit of measuring gained, calculate the number of times M that needs to feed signal, if N=2 ^X, if M=x then is 2 ^x＜N＜2 ^X+1, M=x+1 then;

C) the circuit number is carried out five equilibrium, if N=2 ^X, then, promptly successively circuit is carried out 2 with branches such as circuit M time ¹, 2 ²2 ^MIf five equilibrium is 2 ^x＜N＜2 ^X+1, then with 2 ^MThe bar circuit promptly carries out 2 with circuit successively as the circuit number of need five equilibrium ¹, 2 ²2 ^MFive equilibrium;

D) according to the five equilibrium number of times of confirming among the step c; Feed signal in the circuit after waiting branch successively, half circuit adds drive signal, and second half circuit adds sampled signal; And drive signal and sampled signal are for alternately to feed in the circuit; And after feeding signal, signal is carried out record,, confirm that then there are short circuit in this circuit and a certain circuit if in the circuit that feeds sampled signal, detected drive signal; And in follow-up test process, no longer feed drive signal, only this circuit is sampled to this circuit;

E) judge based on data recorded and confirm to have short circuit between those circuits.

Below in conjunction with instance the present invention is further specified;

The supposition drive signal is 1 among the present invention, and sampled signal is 0, and when two line shorts, the circuit that loads sampled signal also can record drive signal;

Embodiment one: with 8 circuits is that instance is given an example, and 8 circuits are numbered 1,2,3 ... 8; Suppose 2 in circuit and 5 short circuits, 3 and 8 short circuits;

8=2 in the present embodiment ³, the number of times that promptly needs messenger is 3, and according to 2 five equilibriums, 4 five equilibriums, 8 five equilibriums circuit is carried out five equilibrium; Table 1 specific as follows,

Table 1

From table, can know;

1, for the first time 8 circuits is halved; Preceding 4 the tunnel feed drive signal, and back 4 tunnel feeds drive signal, has detected drive signal in the circuit 5 and 8; Confirm that circuit 5 and 8 is the problem circuit; In follow-up signal loading process, circuit 5 and 8 is the load driver signal not, loads sampled signal and detects;

2, for the second time 8 circuits are carried out the quartern, circuit 1-2,6, feed drive signal, all the other circuits feed sampled signal, still can detect drive signal in the circuit 5; Circuit 8 does not detect drive signal;

3, for the third time 8 circuits are carried out eight equal parts, alternately feed drive signal and sampled signal, still can detect drive signal in the circuit 8; And data recorded analyzed; From table, can know, circuit 2 and 5, circuit 3 is identical with 8 data; Be circuit 2 and 5 short circuits, short circuit between the circuit 3 and 8.

Embodiment two is that instance is given an example with 10 circuits, and 10 circuits are numbered 1,2,3,4 ..., 10, suppose 2,3 and 6 between short circuit;

In the present embodiment 2 ³＜10＜2 ⁴, promptly need be with the bar number of 16 circuits as the circuit of five equilibrium, carry out five equilibrium according to 16 circuits the short-circuit state of preceding 10 circuits is detected, and the number of times that feeds signal is 4 times; Concrete numerical value can be known (table 2) from following table;

Table 2

Can know from last table,

1, halve according to 16 circuits, promptly preceding 8 circuits feed drive signal, and circuit 9 and 10 feeds sampled signal;

2, carry out the quartern according to 16 circuits, alternately feed during owing to drive signal and sampled signal, promptly circuit 1-4 feeds drive signal; Circuit 5-8 feeds sampled signal, and circuit 9 and 10 feeds drive signal, because 2 and 6 short circuits; Also can obtain drive signal in the circuit 6, promptly confirm 6 with a certain line short, promptly in follow-up measuring process; No longer feed drive signal in the circuit 6, only feed sampled signal and detect;

3, carry out eight equal parts according to 16 circuits, i.e. circuit 1-2,5 (circuit 6 is confirmed as in the preorder step and circuit 2 short circuits; No longer feed drive signal), feed drive signal among the 9-10, feed sampled signal in the remaining circuit; Can know in the circuit 3 that feeds sampled signal to record drive signal, promptly confirm 3 with a certain line short, in follow-up test process; Circuit 3 also no longer feeds drive signal, only feeds sampled signal and detects;

4, carry out 16 five equilibriums according to 16 circuits; Be that circuit 1-16 alternately feeds drive signal and sampled signal (has confirmed in the preorder step that there is short circuit problem in circuit 3 and 6; So no longer feed drive signal); List according to record sheet can know that the numerical value of circuit 2,3,6 is identical, can confirm circuit 2,3, short circuit between 6.

Whether in sum, adopt method of testing of the present invention, can test out fast has short circuit phenomenon in the middle of the circuit, and can confirm accurately that those circuits have problems, and has improved the test speed whether multi-line exists short circuit, has shortened the test duration.

Claims (1)

1. based on the circuit on-off method for rapidly testing of dichotomy, it is characterized in that: it may further comprise the steps:

A) N is added up and be recorded as to the circuit number of needs being measured;

B) count N according to the circuit of measuring gained, calculate the number of times M that needs to feed signal, if N=2 ^X, if M=x then is 2 ^x＜N＜2 ^X+1, M=x+1 then;

C) the circuit number is carried out five equilibrium, if N=2 ^X, then, promptly successively circuit is carried out 2 with branches such as circuit M time ¹, 2 ²2 ^MIf five equilibrium is 2 ^x＜N＜2 ^X+1, then with 2 ^MThe bar circuit promptly carries out 2 with circuit successively as the circuit number of need five equilibrium ¹, 2 ²2 ^MFive equilibrium;

D) according to the five equilibrium number of times of confirming among the step c, feed signal in the circuit after waiting branch successively, half circuit adds drive signal; Second half circuit adds sampled signal; And drive signal and sampled signal be for alternately to feed in the circuit, and after feeding signal, signal is carried out record, if in the circuit that feeds sampled signal, detected drive signal; Confirm that then there are short circuit in this circuit and a certain circuit; And in follow-up test process, no longer feed drive signal, only this circuit is added sampled signal, and the value of record sampling to this circuit;

E) judge based on data recorded and confirm to have short circuit between those circuits.