| 摘要 |
PROBLEM TO BE SOLVED: To provide a pressure sensor, the simple structure of which enables its use in a narrower spot, being robust against mechanical vibration, and also minimizing its output variation under an adverse environment due to temperature, magnetism, etc., by allowing its sensing section and electrical processing section to be non-contact. SOLUTION: The sensor approximates a coil to the sensing section (an electric conductor or a magnetic body) causing displacement by pressure variation, periodically impresses a pulsed voltage to this coil 1, allows a capacitor 4 to be charged or discharged, and then converts the time required for the voltage in discharging to exceed the threshold of a comparator 5 into a voltage value, detecting pressure. COPYRIGHT: (C)2003,JPO
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