Importance

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Abstract

A sensor signal transmission system for transmitting serially sensor signals produced in parallel by a plurality of sensors installed at a remote station to a central control station. The central control station includes a clock generating circuit, a signal conversion circuit for converting a voltage of a power supply source into clock-pulse superposed voltage signal, a start signal generating circuit, and a data extracting/converting circuit for detecting levels of an input signal to the central control station at the timing of the clock signal. The local station is connected to the central control station and signal includes a power generating circuit for generating a source voltage required for electrical energization of the sensors by smoothing the pulse superposed voltage signal. The clock pulses are modulated by the sensor state signals, which modulation is detected by the data extracting/converting circuit of the central station for evaluation or other processing thereof. The amount of wiring hardware can be significantly reduced, while high flexibility in system expansion can be assured.

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First Claim