| 摘要 |
PURPOSE:To make high-precision measurement possible, by obtaining the differential pressure between the pressure value of a part to be measured, which is measured by a semiconductor pressure sensor, and the atmospheric pressure value measured by the same sensor to eliminate the error included in the measured value of the pressure sensor. CONSTITUTION:When an ignition switch of a vehicle is turned on, a solenoid valve 32 receives the signal from a controller 40 and is operated and opens one end of a tube 30 to the air side for a certain time. A pressure sensor 34 measures [(reference air pressure) Pa+(error) DELTAP] as the measured value, and the controller 40 stores it. Next, the solenoid valve 32 receives the signal from the controller and is operated and closes the tube 30. A solenoid valve 18 receives the signal from the controller 40 and is operated and connects an air chamber in a front fork 10 and a tube 22 through a tube 14. The sensor 34 measures [Pf (measured pressure)+DELTAP(error)] as the pressure measured value of the air chamber in the front fork 10 and inputs it to the controller 40. |
