Signal collecting method based on safe input system and system of signal collecting method
A technology of safe input and signal acquisition, applied in general control systems, control/regulation systems, instruments, etc., can solve problems such as level input error acquisition, system failure to monitor failures in time, train rear-end collisions, etc.
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[0026] Such as figure 1 , figure 2 and Figure 4 As shown, the signal acquisition method based on the safety input system includes several input circuit modules 1, the input circuit module 1 is provided with an input terminal, a check-back terminal S3 and an excitation terminal S2, and the check-back terminal S3 and The excitation terminal S2 is connected to the processor module 2, and the input terminal of the input circuit module 1 collects the detected input signal in the rail transit system. The input signal is a slowly changing digital signal, and the processor module 2 generates the excitation signal through the excitation terminal S2 , the excitation signal is a dynamic pulse signal, and the excitation signal and the input signal are superimposed at the return inspection terminal S3 to generate a return inspection signal. Since there are several input circuit modules, in order to avoid confusion in the reading of the collected input signal, in each return Both the de...
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