| 摘要 |
PURPOSE:To measure the position of an automatic transport device with high accuracy by providing many pressure-sensitive elements around a support member which is formed oscillatably with an end of the support member defined as a fulcrum and then correcting the position of said transport device from the variation state of characteristics of the pressure-sensitive element owing to a contact between the support member and the pressure-sensitive element. CONSTITUTION:When a transport device 1 is positioned on a sloping traveling surface, a support member 21 which supports an ultrasonic wave oscillating part 2 has a tilt in response to the sloping degree of the traveling surface. Therefore the member 21 has a contact with either one of many pressure-sensitive elements 6 provided around a prescribed area of the member 21 with small gaps. Thus the element 6 produces a resistance change, and this resistance change is measured by a resistance measuring part. The result of this measurement is sent to a processing part and then to a command part in the form of a position correcting signal. Then the command part gives an indication to the device 1 for a shift to a prescribed position.
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