CN202256608U

CN202256608U - Circuit board testing device

Info

Publication number: CN202256608U
Application number: CN2011203830129U
Authority: CN
Inventors: 黄火卫; 黄海峰
Original assignee: FUJIAN SANYUANDA SOFTWARE Co Ltd
Current assignee: FUJIAN SANYUANDA SOFTWARE Co Ltd
Priority date: 2011-09-29
Filing date: 2011-09-29
Publication date: 2012-05-30
Anticipated expiration: 2021-09-29

Abstract

The utility model provides a circuit board testing device which comprises a fixture body, wherein the fixture body is provided with a test circuit module, a power supply interface, a power supply converter and a thimble module, wherein the power supply interface is connected with the test circuit module through the power supply converter, and the test circuit module is connected to a to-be-tested circuit board outside the circuit board testing device through the thimble module. The test circuit module comprises a CPU, a signal output circuit, a signal input circuit, a power supply circuit and a key input circuit, wherein the signal output circuit, the signal input circuit, the power supply circuit and the key input circuit are connected to the CPU. According to the circuit board testing device, testing procedures can be simplified and testing efficiency is increased. The circuit board testing device has the advantages of programmable characteristic, flexible application, simple structure and low production cost.

Description

A kind of circuit board testing device

[technical field]

The utility model relates to a kind of proving installation of circuit board.

[background technology]

Board design gets into volume production during the stage after realizing accomplishing, and is reliable for each piece board quality of guaranteeing to produce, must test each piece circuit board, for this reason must the corresponding circuit board testing frock of exploitation.Circuit board testing frock in the past mostly need be built complicated system and come the actual working environment of analog circuit board that circuit board is tested; Also relate to simultaneously cooperatively interacting of polylith circuit board; The construction cycle of circuit board testing frock is longer relatively, and cost is higher, and testing efficiency is lower.

Circuit board detecting instrument relatively more commonly used at present is the ICT testing tool; Through directly the test of online device electric property being found defective and components and parts bad of manufacturing process; Its concrete testing procedure is exactly on circuit board, to reserve abundant test point in advance, calculates the circuit parameter of the internal resistance electric capacity and so on of these test points then, in the input computing machine; The ICT testing tool is provided with and the corresponding testing needle of test point; Testing needle can push up on the test point, measure parameter after, the parameter comparison in parameter that measures and the computing machine is tentatively judged whether mainboard has problem; And well-known, the ICT testing tool is relatively more expensive, and the complicated steps of test is measured very inconvenient.

[summary of the invention]

The technical matters that the utility model will solve is to provide a kind of circuit board testing device, and it can simplify test step, improves testing efficiency, has programmable features simultaneously, and applying flexible is simple in structure, the advantage of low production cost.

The utility model is achieved in that a kind of circuit board testing device; It comprises a frock body; Said frock body is provided with test circuit module, power interface, power supply changeover device, thimble module; Said power interface connects said test circuit module through power supply changeover device, and said test circuit module is connected to the outside circuit board under test of said circuit board testing device through the thimble module.

Said test circuit module comprises a cpu, and the signal output apparatus, the signal input circuit that are connected in said cpu, feed circuit, button inputting circuits.

Further, said signal output apparatus comprises digital signal output circuit, simulating signal output circuit, the state display output circuit that all is connected with CPU; Said signal input circuit comprises digital signal input circuit, the analog signal input circuit that all is connected with CPU, and said digital signal input circuit, digital signal output circuit synthesize a bi-directional digital IO interface.

Further, said analog signal input circuit is the A/D change-over circuit, and said simulating signal output circuit is the D/A change-over circuit.

The utlity model has following advantage:

The test signal that the test circuit module of the utility model utilizes CPU to produce sends the circuit board that needs test to from signal output apparatus through the thimble module; Test signal is through getting into test circuit module by signal input circuit behind the circuit board; And compare processing, and output test result through the state display output circuit by CPU.The state display output circuit can be acousto-optic alert device such as LED light, LCD display or hummer, supplies user's identification.The quality of the utility model decision circuitry plate has been simplified the test step of workman's testing single-board quality greatly by the CPU identification of test circuit module, has improved testing efficiency; This device has programmable features simultaneously; Applying flexible, simple in structure, low production cost; Can replace expensive ICT testing tool, significantly reduce the testing cost of veneer.

[description of drawings]

Combine embodiment that the utility model is further described with reference to the accompanying drawings.

Fig. 1 is the structural representation of a kind of circuit board testing device of the utility model.

Fig. 2 is the structural representation of the test circuit module of the utility model.

Fig. 3 is the utility model circuit board testing device and the synoptic diagram that is connected of circuit board under test.

Fig. 4 is the method for testing synoptic diagram of the utility model circuit board testing device.

[embodiment]

See also Fig. 1 to shown in Figure 4, the embodiment of the utility model is carried out detailed explanation.

Like Fig. 1; A kind of circuit board testing device; It comprises a frock body; Said frock body is provided with a test circuit module, power interface, power supply changeover device, thimble module, and said power interface connects said test circuit module through power supply changeover device, and said test circuit module is connected to the outside circuit board under test of circuit board testing device through the thimble module.

Like Fig. 2, said test circuit module comprises a cpu, and the signal output apparatus, the signal input circuit that are connected in said cpu, feed circuit, button inputting circuits.Said signal output apparatus comprises digital signal output circuit, simulating signal output circuit, the state display output circuit that all is connected with CPU; Said signal input circuit comprises digital signal input circuit, the analog signal input circuit that all is connected with CPU, and said digital signal input circuit, digital signal output circuit synthesize a bi-directional digital IO interface.Said analog signal input circuit is the A/D change-over circuit, and said simulating signal output circuit is the D/A change-over circuit.Said state display output circuit can be acousto-optic alert device such as LED light, LCD display or hummer, supplies user's identification.

Like Fig. 3; Said test circuit module is through test input point, the test output point corresponding connection of thimble module with circuit board under test, and then the bi-directional digital IO interface of test circuit module is connected with digital input circuit, the digital output circuit of circuit board under test; The A/D change-over circuit of test circuit module is connected with the analog output circuit of circuit board under test; The D/A change-over circuit of test circuit module is connected with the analog input circuit of circuit board under test; The feed circuit of test circuit module are connected with the power circuit of circuit board under test, are the circuit board under test power supply.

The workflow of the method for testing of this circuit board testing device:

On the circuit of needs test, must design the test point that leaves enough tests on the circuit board under test.

Give said test circuit module power supply through power interface, power supply changeover device, according to the mode of Fig. 3 with the corresponding connection of the test point of said test circuit module through thimble module and circuit board under test (test input point, test output point).

In conjunction with Fig. 4,

The cpu of step 1, test circuit module produces test signal according to pre-programmed;

Step 2, said test signal are delivered to the test input point of circuit board under test through the thimble module; Said test signal is through behind the current path of circuit board under test; By the test output point output of circuit board under test, get back to test circuit module again through the thimble module;

Step 3, cpu compare the test signal of output and the test signal of input, judge the test result of current path, and preserve;

Whether step 4, judgement test are all accomplished, if all completion then finishes test, and output last test result; If all do not accomplish, then switch to next path of circuit board under test, get back to step 1.

In said step 3, after cpu judges to draw the test result of current path, can export this test result immediately, can wait until that also test is all accomplished in the step 4 after, unifiedly at last output test result.In the said step 1, the test signal that cpu produces is that the signal type according to the circuit board under test test point produces, and is digital signal or simulating signal.

The above; Be merely the utility model preferred embodiment; So can not limit the scope that the utility model is implemented according to this, the equivalence of promptly doing according to the utility model claim and description changes and modifies, and all should still belong in the scope that the utility model contains.

Claims

1. circuit board testing device; It comprises a frock body; It is characterized in that: said frock body is provided with test circuit module, power interface, power supply changeover device, thimble module; Said power interface connects said test circuit module through power supply changeover device, and said test circuit module is connected to the outside circuit board under test of said circuit board testing device through the thimble module, and said test circuit module comprises a cpu; And the signal output apparatus, the signal input circuit that are connected in said cpu, feed circuit, button inputting circuits.

2. a kind of circuit board testing device according to claim 1 is characterized in that: said signal output apparatus comprises digital signal output circuit, simulating signal output circuit, the state display output circuit that all is connected with CPU; Said signal input circuit comprises digital signal input circuit, the analog signal input circuit that all is connected with CPU.

3. a kind of circuit board testing device according to claim 2 is characterized in that: said digital signal input circuit, digital signal output circuit synthesize a bi-directional digital IO interface.

4. according to claim 2 or 3 described a kind of circuit board testing devices, it is characterized in that: said analog signal input circuit is the A/D change-over circuit, and said simulating signal output circuit is the D/A change-over circuit.