| 摘要 |
PURPOSE:To detect the own position of a moving body with high accuracy, by performing transmission and reception by an ultrasonic wave between the ultrasonic sensor on the moving body and the ultrasonic reflector outside the moving body. CONSTITUTION:The ultrasonic wave transmitted from the ultrasonic sensor 7 on a moving body is reflected by an ultrasonic wave reflector to be received by the sensor 7 and inputted to distance and amplitude measuring circuits 15, 16 through an amplifier 14. The distance from the sensor 7 to the reflector is calculated by the circuit 15 and the amplitude of the received ultrasonic wave signal is calculated by the circuit 16. Subsequently, a drive apparatus 11 is controlled on the basis of output signals of the circuits 15, 16 by a signal processing circuit 17 through a control circuit 18 so as to accurately oppose the sensor 7 and the reflector and the output signal from an angle detector 12 is taken in. The sensor 7, the apparatus 11, the detector 12, an oscillator 13, the amplifier 14 and circuits 15 18 are provided in plural numbers and the output signals from plural signal processing circuits 17 are inputted to an operation circuit 19 to control the drive apparatus 11. The oscillation direction of the sensor 7 is accurately opposed to the reflector and, by the output signals of the circuits 15, 16 at this time, the position of the moving body is calculated and displayed on a display circuit 20. |
