| 摘要 |
<P>PROBLEM TO BE SOLVED: To constitute a door sensor unit excelling in acquiring artificial operation and vibration such as a knock applied to a door or a vehicle body. <P>SOLUTION: The inner surface of an upper wall 22 of a unit body 20 provided at a rear door is provided with a first piezoelectric body S1 and a second piezoelectric body S2 through a spring plate 27. Pressure resulting from artificial operation is detected by the first piezoelectric body S1 from the elastic deformation of the spring plate 27, and vibration when knocking the rear door is detected simultaneously by the first piezoelectric body S1 and the second piezoelectric body S2. Detection signals are supplied to a control device for controlling an open actuator to determine the vibration of a vehicle or the artificial operation. <P>COPYRIGHT: (C)2009,JPO&INPIT |
