CN104407283A - Device and method for automatically detecting hidden damage of circuit board - Google Patents

Abstract

The invention provides a device and method for automatically detecting the hidden damage of a circuit board. The device is characterized by comprising a control and judgment system, wherein the control and judgment system is connected with a detected circuit board operation panel; the detected circuit board operation panel is connected with a detected circuit board; the detected circuit board is provided with N function modules, and N is an integer of not less than 1; the ports of the function modules are connected with a tandem or parallel circuit of a load and a current meter; the load is a real load or a simulated load with the same performance parameters as the real load. According to the device, the hidden damage of part of circuit boards can be tested, the output of unqualified circuit boards is reduced, the test efficiency is improved, and the working intensity of testers is reduced.

Description

A kind of automatic detection device of wiring board implicit damage and method

Technical field

The actual loading of analog line plate of the present invention and operation process, realize, to the automatic test of wiring board, belonging to electronic applications.

Background technology

Wiring board is becoming in the process of finished product by hundreds of electronic unit, needs through technological processs such as the machine transplanting of rice, paster, welding, also needs the cooperation of a lot of frock clamp just can complete in the implementation of these techniques simultaneously.Therefore, becoming in the process of finished product by part, can cause a certain proportion of bad unavoidably, such as: resistance, electric capacity ftracture, device rosin joint, wiring board cracking etc.The resistance of 5% precision of a such as 1K Ω, has ftractureed because of stressed in wiring board production run, wiring board finished product assembled after the resistance of this resistance become 1.3K Ω.But owing to installing on circuit board, measure its resistance and be difficult to accurately measure its real resistance by the impact of other devices on whole circuit board.And the method for testing of the emitting led mimic channel break-make of traditional use and manual observation as shown in Figure 1, the function port connecting luminous diode D of test line plate is as test load, when there is implicit damage in this test line plate, light emitting diode still can be luminous, and this method of testing cannot detect the situation of this resistance cracking on wiring board.So this wiring board is after being used, and the circuit function that this resistance can be made corresponding due to the continuous deterioration of cracking resistance lost efficacy.

In addition, because wiring board needs to realize a series of function, manual testing needs to require to test each function one by one according to certain step.So must carry out detailed training to operative employee before operation on duty.Meanwhile, if by the display result of test by leading to or the disconnected comparison made into actual measurement parameter and theoretical value, manual testing can cause failing to judge and judging by accident due to the carelessness of employee.For avoiding these problems, being also beneficial to work shift operation for improving testing efficiency and simplifying pre-job training simultaneously, needing a kind of equipment automatically to complete the functional test work of wiring board.

Summary of the invention

The object of the invention is to produce a kind of full automatic, can the circuit board function pick-up unit of measurement circuit plate portion implicit damage and method.

In order to reach above object, the invention provides a kind of automatic detection device of wiring board implicit damage, it is characterized in that, comprise control and judgement system, described control with judge that system is connected test line plate operation panel, test line plate operation panel connects test line plate, described test line plate has N number of functional module, N be more than or equal to 1 integer, the port connection load of described functional module and the series circuit of reometer or the parallel circuit being connected load and voltage table, described load is real load or the fictitious load consistent with real load performance parameter.

Present invention also offers a kind of automatic testing method of wiring board implicit damage, it is characterized in that, adopt the automatic detection device of above-mentioned wiring board implicit damage, concrete steps comprise:

Step 1: by controlling and judging that system judges whether the start key of test line plate operation panel is pressed, and if so, enters next step, if not, waits for that start key is pressed;

Step 2: control and judge that system judges whether the electrical quantity of N number of functional module of test line plate operation panel meets the requirements, and if so, then preserves the result of this functional module OK one by one, if not, then preserving the result of this functional module NG.

The present invention, when the function of measurement circuit plate, needs to connect real load or the fictitious load consistent with real load performance parameter, by controlling and judging that Dynamic System test line plate operation panel is tested in order; The contrast parameter of each function of test line plate under actual condition and the design parameter of this functional circuit, carry out the function of measurement circuit plate one by one.Control and judgement system output test result after testing all functions.

Compared with prior art, the invention has the beneficial effects as follows:

The implicit damage of energy part of detecting wiring board of the present invention, reduces the outflow of defective wiring board; Improve testing efficiency, and alleviate the working strength of tester.

Accompanying drawing explanation

Fig. 1 is traditional emitting led mimic channel break-make of use and the proving installation of manual observation:

Fig. 2 is the automatic detection device structural representation of wiring board implicit damage;

Fig. 3 is the automatic testing method process flow diagram of wiring board implicit damage.

Embodiment

Below in conjunction with specific embodiment, set forth the present invention further.Should be understood that these embodiments are only not used in for illustration of the present invention to limit the scope of the invention.In addition should be understood that those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values fall within the application's appended claims limited range equally after the content of having read the present invention's instruction.

Embodiment

As shown in Figure 2, for the automatic detection device structural representation of wiring board implicit damage, the automatic detection device of described wiring board implicit damage comprises control and judgement system, described control with judge that system is connected test line plate operation panel, test line plate operation panel connects test line plate, described test line plate has N number of functional module, N is 3, the port of first functional module connects the series circuit of load and reometer, the port of second functional module connects the series circuit of load and reometer, the port of the 3rd functional module connects the parallel circuit of load and voltage table, described load is real load.

As shown in Figure 3, the concrete steps of the automatic testing method of the wiring board implicit damage of the automatic detection device of above-mentioned wiring board implicit damage are adopted to be:

Step 1: by controlling and judging that system judges whether the start key of test line plate operation panel is pressed, and if so, enters next step, if not, waits for that start key is pressed;

Step 2: control and judge that the button of first functional module of test line plate pressed by Systematical control test line plate operation panel, read the reading of the reometer of first functional test circuit, judge whether this reading meets the requirements, if, then preserve the result of this functional module 0K, if not, then the result of this functional module NG is preserved;

Step 3: control and judge that the button of second functional module of test line plate pressed by Systematical control test line plate operation panel, read the reading of the reometer of second functional test circuit, judge whether this reading meets the requirements, if, then preserve the result of this functional module 0K, if not, then the result of this functional module NG is preserved;

Step 4: control and judge that the button of the 3rd functional module of test line plate pressed by Systematical control test line plate operation panel, read the reading of the voltage table of the 3rd functional test circuit, judge whether this reading meets the requirements, if, then preserve the result of this functional module 0K, if not, then the result of this functional module NG is preserved;

Step 5: output test result.

Claims (2)

1. the automatic detection device of a wiring board implicit damage, it is characterized in that, comprise control and judgement system, described control with judge that system is connected test line plate operation panel, test line plate operation panel connects test line plate, described test line plate has N number of functional module, N be more than or equal to 1 integer, the port connection load of described functional module and the series circuit of reometer or the parallel circuit being connected load and voltage table, described load is real load or the fictitious load consistent with real load performance parameter.

2. an automatic testing method for wiring board implicit damage, is characterized in that, adopt the automatic detection device of wiring board implicit damage according to claim 1, concrete steps comprise:

Step 1: by controlling and judging that system judges whether the start key of test line plate operation panel is pressed, and if so, enters next step, if not, waits for that start key is pressed;

Step 2: control and judge that system judges whether the electrical quantity of N number of functional module of test line plate operation panel meets the requirements, and if so, then preserves the result of this functional module OK one by one, if not, then preserving the result of this functional module NG.