| 摘要 |
PURPOSE:To enable feedback of pressure to an air pressure controller accurately by inserting a solenoid value between the air pressure controller and a pressure detector as air pressure detector. CONSTITUTION:It is assumed that a solenoid valve 15 is provided between an air pressure controller 14 and a pressure detector 13. For example, when altering the air pressure in a tire controlled to 2kg/cm<2> from 1kg/cm<2>, the solenoid valve 15 is closed with a certain timer (a), the pressure detector 13 is sampled (a') when a pressure balance is obtained between the pressure detector 13 and the tire 11 after a certain time to determine a difference from the set pressure which is feedback to the air pressure controller 14 via an air pressure control circuit 17 while the solenoid valve 15 is opened to feed air into the tire. With the repetition of this operation several times, the sampling pressure of the pressure detector converges to a set value. This enables an accurate feedback of the pressure to the air pressure controller. |
