CN204256086U

CN204256086U - A kind of open circuit short-circuit test device of wiring board

Info

Publication number: CN204256086U
Application number: CN201420648072.2U
Authority: CN
Inventors: 王文娟
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-10-31
Filing date: 2014-10-31
Publication date: 2015-04-08
Anticipated expiration: 2024-10-31

Abstract

A kind of open circuit short-circuit test device of wiring board, comprise single-chip microcomputer and warning indicator, single-chip microcomputer is connected with tested wire, the controller control interface input logic signal of single-chip microcomputer, is connected with the output terminal of single-chip microcomputer for the warning indicator of information feed back received by single-chip microcomputer.The utility model is used for the short circuit path test in circuit, its advantage can be tested by programmed control simultaneously and judge tens up to a hundred wires, decreasing Measuring Time and people makes mistakes for causing, improving test speed greatly, increase work efficiency height and accuracy.

Description

A kind of open circuit short-circuit test device of wiring board

Technical field

The utility model belongs to wiring board technical field of measurement and test, specifically a kind of open circuit short-circuit test device of wiring board.

Background technology

Electronic product forms by normally adding connection wire by components and parts, connect wire normally PCB, PCB have again hardboard and soft board point, their every bar circuit can not be opened a way, short circuit can not be had between every two wires, otherwise the major defect that can be directed at product maybe cannot use.The common method of usual factory inspection open circuit short circuit measures with multimeter resistance grade.

Shown in Fig. 1 (a), wire (body) on a PCB that need measure, normal is very little very little without its resistance when measuring its resistance with multimeter resistance grade during open-circuit condition, is usually less than 1 close to 0 ohm, if its pointer of pointer universal meter can be parked in rightmost.

Shown in Fig. 1 (b), wire (body) on two adjacent PCB that need measure, normal without being very large very large by its resistance during multimeter resistance grade measuring resistance during short-circuit condition, usually close to ∞ ohm, if its pointer of pointer universal meter can be parked in Far Left (pointer swings hardly).

Whether such test can be normally that nothing is opened a way, the status checking of short circuit out, but has very large shortcoming to be that test speed is too slow every root wire, checks that single line need spend 2 to 3 seconds time, and manually reading need differentiate that labour intensity great Yi makes mistakes.

Utility model content

In view of this, the utility model provide a kind of quick and precisely, the open circuit short-circuit test device of wiring board simple to operate.The design proposal that the utility model adopts is:

A kind of wiring board open circuit short-circuit test device, comprise single-chip microcomputer and warning indicator, this single-chip microcomputer has multiple test interface sending test signal, and tested wire is connected on test interface, and the output interface of single-chip microcomputer is connected is connected to the warning indicator shown test results.

As the improvement to such scheme, single-chip microcomputer is provided with the routine interface for writing program compiler.

As further improvement of these options, described test interface is at least three right.

Compared with prior art, the utility model tool has the following advantages:

The utility model is used for the short circuit path test in circuit, can test simultaneously and judge dozens or even hundreds of wire by programmed control, decrease Measuring Time and people is the probability causing makeing mistakes, improve test speed greatly, improve work efficiency and accuracy.

Accompanying drawing explanation

Fig. 1 (a), 1 (b) is prior art test.

Fig. 2 is the utility model detection line open circuit short circuit block diagram.

Embodiment

In order to allow those skilled in the art understand the technical solution of the utility model better, below in conjunction with accompanying drawing, the utility model is further elaborated.

As shown in Figure 2.What the present embodiment disclosed is hardware connection structure, comprise single-chip microcomputer and warning indicator, this single-chip microcomputer has multiple test interface sending test signal, tested wire is connected on test interface, the output interface of single-chip microcomputer is connected and is connected to the warning indicator shown test results, for feeding back between detected wire whether occur short circuit phenomenon of opening a way, single-chip microcomputer is provided with the routine interface for writing program compiler, test interface is that an I/O port is to the 6th I/O port, by wire AB, CD, one I/O port (being expressed as I/O1 in Fig. 2) of the A port access single-chip microcomputer of EF, 6th I/O port (being expressed as I/O6 in Fig. 2) of B port access single-chip microcomputer, 2nd I/O port (being expressed as I/O2 in Fig. 2) of C port access single-chip microcomputer, 5th I/O port (being expressed as I/O5 in Fig. 2) of D port access single-chip microcomputer, 3rd I/O port (being expressed as I/O3 in Fig. 2) of E port access single-chip microcomputer, 4th I/O port (being expressed as I/O4 in Fig. 2) of F port access single-chip microcomputer.

It is three right that above-mentioned single-chip microcomputer test interface is not limited to, as long as more wire can also be tested in the basis that allows of single-chip microcomputer test interface.

It is as follows that the present embodiment discloses the implementation process detecting wire:

First write the control program signal of single-chip processor i/o port by the routine interface on single-chip microcomputer and detecting open circuit program, program is inputted single-chip microcomputer control, setting I/O1, I/O2, I/O3 port is low level output, and setting I/O4, I/O5, I/O6 are high level input.Initialization also performs open circuit trace routine, Single-chip Controlling I/O1, I/O2, I/O3 port output low level, enter from wire A, B, C port, through wire AB, CD, EF, I/O4, I/O5, I/O6 port entering single-chip microcomputer is flowed out from wire D, E, F end, when the input signal of I/O4, I/O5, I/O6 tri-ports that microprocessor detect arrives is still for low level, illustrate that the line segment of AB, CD, EF tri-wires is phenomenons of not opening a way normally; Otherwise when when microprocessor detect to the input signal of I/O4, I/O5, I/O6 tri-ports be high level time, illustrate that the line segment of AB, CD, EF tri-wires is abnormal existence open circuit phenomenons, now single-chip microcomputer output signal end connects warning indicator output alarm signal, and feedback line exists open circuit phenomenon.

After open circuit detects, again write the control program signal of single-chip processor i/o port by the routine interface on single-chip microcomputer and detect short circuit program, program is inputted single-chip microcomputer control, setting I/O1, I/O6, I/O3, I/O4 port is low level output, and setting I/O2, I/O5 port is high level input.Initialization also performs short-circuit detecting program, Single-chip Controlling I/O1, I/O6, I/O3, I/O4 port output low level, I/O2, I/O5 port of control single chip computer is high level input, when the input signal of I/O2, I/O5 bis-ports that microprocessor detect arrives is still for high level, illustrate that the line segment of AB, CD, EF tri-wires does not have short circuit phenomenon normally; Otherwise when when microprocessor detect to the input signal of I/O2, I/O5 bis-ports be low level time, illustrate to there is short circuit phenomenon between AB and CD, now single-chip microcomputer output signal end connects warning indicator output alarm signal, and feedback line exists short circuit phenomenon.

It is more than the utility model preferably implementation; it should be noted that; when not deviating from the utility model spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and distortion according to the utility model, but these change and are out of shape the protection domain that all should belong to the claim appended by the utility model.

Claims

1. the open circuit short-circuit test device of a wiring board, comprise single-chip microcomputer (1) and warning indicator (2), it is characterized in that: this single-chip microcomputer (1) has multiple test interface sending test signal, tested wire is connected on test interface, and the output interface of single-chip microcomputer (1) is connected is connected to the warning indicator (2) shown test results.

2. the open circuit short-circuit test device of wiring board according to claim 1, is characterized in that, single-chip microcomputer (1) is provided with the routine interface (3) for writing program compiler.

3. the open circuit short-circuit test device of wiring board according to claim 2, is characterized in that, described test interface is at least three right.