| 摘要 |
PROBLEM TO BE SOLVED: To provide a pressure detecting device with the high range ability, high resolution and high accuracy. SOLUTION: A switch block unit 2 energiges any one of switches SW1-SW3 on the basis of the selecting signal 10, and selects one sensor signal from a multi diaphragm sensor unit 1. This sensor signal is amplified by an amplifier 11 and converted to the numerical conversion data by an AD converting unit 12. A microcomputer 13 reads out this conversion data, and inputs the selecting signal 101 to the switch block unit 12 so as to select a sensor having the optimal pressure range. The microcomputer 13 computes for correction, and inputs the input pressure signal corresponding to a value of the sensor signal to an output circuit 14. The output circuit 14 transmits the input pressure signal as the current signal I onto two-core cable.
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