A Real-time A/D Fault Diagnosis Method Based on FPGA
A diagnosis method and real-time fault technology, applied in the direction of analog/digital conversion calibration/testing, etc., can solve the problems of time-consuming and laborious, poor real-time SV data, unable to guarantee illegal SV detection, etc., achieving strong portability and shortening the re-development cycle. , Improve the effect of anti-interference
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[0028] As a specific implementation mode, the Spartan6 series XC6SLX4 of Xilinx Company and the AD7606 of ANALOGDEVICES Company are selected, each A / D has 8 channels, so 12 A / Ds are used to support 96 channels, and the parallel processing characteristics of FPGA fully satisfy Real-time detection of the 12 A / Ds.
[0029] The present invention connects the eighth channel of each A / D to the power supply VCC for A / D self-inspection. Implementation method: FPGA detects the output characteristic signals and A / D of 12 A / D chips in each sampling cycle. Self-inspection channel, record the level changes of 12 A / D characteristic signals and do power self-inspection on 12 A / Ds, if the requirements are not met, the A / D is considered to be faulty. Such as figure 2 Shown is the hardware block diagram of the A / D real-time fault diagnosis system of the FPGA of the present invention. First, the system is powered on, and the FPGA is configured from the external flash. After the configuration ...
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