PCB circuit board based on the PCB board learned associated application software, virtual instrument idea that the various functions of traditional instruments through software, including oscilloscopes, signal generators, as well as a variety of mathematical treatment of data collection and so on. When the test is given digital signal by testing software.
PCB board test system will have a new design ideas, design ideas using USB bus-based automatic test systems and virtual instruments, give full play to the role of the computer, and try by the computer to replace the traditional instrument of thought, thereby reducing the instrument The volume itself, reducing development costs, thus improving the efficiency of development.
Analog stimulus signal through the D / A conversion required to get tested is applied to the test system, and then tested by the test circuit on the bus to the switch matrix, the switch matrix and simultaneously connected by the microprocessor to control the on-off, was measured PCB board is fixed to the needle bed, the excitation signal by applying to the appropriate location on the printed circuit board, by the test circuit measured obtaining the response, the amount of simulation will be collected into the core control, after A / D conversion, to give the corresponding The digital, software PCB machine feedback out and after PCB treatment to determine the PCB is qualified.
Online testing technology breakthrough before the human eye detecting circuit board method, high efficiency online testing technology, missed low, automated detection area. The detection system uses a combination of virtual instrument thought, simplify the hardware design, reducing the cost of the entire system.
Basic methods and diodes, transistors PCB board test methods analog components online tests, this test system is suitable for medium and small enterprise applications. Reduce the number of unqualified products into the next process, thereby reducing the amount of rework products, improve production efficiency and reduce the overall cost of manufacturing, increased corporate profits, is now widely used in detection technology, is a highly high-speed, high-accuracy detection method.
Test species present in the printed circuit board PCB board automatic test range used in the field, including the testing of components not tested and equipped with fitted components, the current commonly used test methods are: on-off test, the inner road testing, functional testing edge testing, optical testing and X-ray inspection and so on. Online testing is based on the specific characteristics of the PCB, select the appropriate method of detecting one or more processes together, learn from each other, the integrated use.
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