GPS synchronization method of distributed testing system
A test system and distributed technology, applied in the direction of time division multiplexing system, electrical components, multiplexing communication, etc., can solve the problems of poor anti-interference and difficult implementation, so as to reduce usage, improve synchronization efficiency, and avoid Effects of out-of-sync issues
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[0028] The invention will be described in further detail below in conjunction with the accompanying drawings.
[0029] The GPS synchronization method of a kind of distributed testing system provided by the present invention, specific implementation is as follows:
[0030] 1) Use the GPS timing module to generate and output two kinds of data, one is the PPS pulse signal, and the other is the UTC time t in the serial data corresponding to each PPS pulse signal. Such as figure 1 As shown, the PPS pulse generated by the GPS timing module and the on-site measured signal are input into the FPGA. The on-site measured signal is a digital signal output by the sensor and converted by subsequent conditioning and acquisition circuits. This part of the circuit does not belong to the synchronization unit. not shown in the figure;
[0031] 2) Use FPGA to extract and cache the UTC time t generated by the GPS timing module. The specific operation steps are:
[0032] i. Integrate the UART se...
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