MODULATION TYPE INTERFACE FOR REMOTE SIGNAL

摘要

PROBLEM TO BE SOLVED: To provide an interface receiving a signal from a remote sensor that synchronously collects remote sensor data with hardware able to easily be acquired from the market and employing less number of components than that of a known system at present. SOLUTION: A circuit 17 acting like an interface with sensor 18 has a sensor input current and a modulation sensor current signal corresponding to a sensing state. A control module 20 is connected to the sensors 18 to receive the sensor current signal. The control module 20 converts the sensor current signal into a modulation signal with a pulse width for a period corresponding to the sensing state. The control module 20 counts a time corresponding to the pulse width. The time corresponds to the sensing state.