| At the present time,electronic instruments work in the field, due to various factors caused equipment failure does not normal working. Lacki ng of a real-time fault instrument preliminary test equipment, only take it back to the laboratory for testing and maintenance, wasting a lot of manp ower and financial resources. So portable field fault detection device to so me extent is needed.This work was done by a portable fault detecting device based on the hardware of the system in the field of software design. Because the device is composed of two separate modules, so software design on each module separately. Signal modules in software design, by programming allows DDS chip to output of signal waveform and frequency adjustable, and you can also complete the AD conversion module detects output voltage programming. Software design of data acquisition module, in order to better achieve the aim of collecting data, not only complete the displayed waveform, amplitude and frequency of the General design of test procedures, also introduces a FFT algorithm to complete the signal display and signal distortion amplitude-frequency characteristic curve computation of related programming. Through the resistive touch screens to complete the design of human-computer interaction interface. Software systems are tested, basic design requirements. |
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