Automatic test circuit, automatic test instrument and automatic test system
An automatic test and circuit technology, applied in the electronic field, can solve the problems of inconvenient use of digital multimeters and low test efficiency, and achieve the effect of improving test efficiency and production efficiency
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Embodiment 1
[0024] refer to figure 1 and figure 2 , the embodiment of the present invention provides an automatic test circuit, which is used to be connected to the computer 4, the external power supply 5, and the circuit board of the electronic product to be tested (ie, the circuit board to be tested 6). The automatic test circuit includes a first switch Module 1, the second switching module 2, and a control module 3 connected to the first switching module 1 and the second switching module 2 respectively, wherein the first switching module 1 has a positive and negative pole for connecting the external power supply 5 The power supply interface (not shown in the figure), and the circuit board interface (not shown in the figure) for connecting the positive and negative poles of the circuit board 6 to be tested; the second switching module 2 is connected with the first switching module 1 , and the second switch switching module 2 has a test lead interface (not shown in the figure) for conn...
Embodiment 2
[0028] In a specific application scenario, when the operating voltage of only one group of voltage test points needs to be tested on the circuit board to be tested 6, the automatic test circuit in the embodiment of the present invention can adopt the following structural design: Specifically, refer to Figure 1 to Figure 3, the embodiment of the present invention provides an automatic test circuit for respectively connecting with a computer 4, an external power supply 5, and a circuit board to be tested 6. The automatic test circuit includes a first switch switching module 1, a second switch switching module 2 and A control module 3 connected to the first switching module 1 and the second switching module 2 respectively, the first switching module 1 includes a third double-pole double-throw relay KA3 and a third control switch K3, the second The switch switching module 2 includes a first double-pole double-throw relay KA1 and a first control switch K1, and the control module 3 ...
Embodiment 3
[0035] In another specific application scenario, when it is necessary to test the working voltage of more than two groups of voltage test points on the circuit board 6 to be tested, at least one second double-pole double-throw relay can be added on the basis of the second embodiment above KA2, wherein, when the number of the second double-pole double-throw relay KA2 is one, the operating voltage of the two groups of voltage test points on the circuit board 6 to be tested can be tested; when the second double-pole double-throw relay KA2 is newly added When the quantity is two, the operating voltages of the three groups of voltage test points on the circuit board 6 to be tested can be tested, and so on. It is possible to test the operating voltage of one more set of voltage test points. For the convenience of description, this embodiment takes two additional second double-pole double-throw relays KA2 as an example for illustration. Specifically, refer to figure 1 , figure 2 a...
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