| 摘要 |
PURPOSE:To accurately obtain the existence, the position, and the shape of a two-dimensional object by sectionalizing a plane where the object exists into a two-dimensional lattice and calculating the measured value of scattered light for the existence of the object on each lattice face and using calculation results to analyze the actual scattered light. CONSTITUTION:A stationary cosine wave is sent to an ultrasonic sound wave transmitter 2 from a quadrature phase oscillator 4 of a two-dimensional object recognizing system, and a two-dimensional object 1 is irradiated with the stationary ultrasonic wave from the sound wave transmitter 2, and the scattered wave is received and analyzed by ultrasonic receivers 3 arranged in an array. The plane where the object 1 exists is sectionalized, and measured values of the scattered wave for the existence of the object on respective lattice faces are preliminarily calculated. Measured values observed by receivers 3 are sent to a complex detecting circuit 5, and the circuit 5 refers to stationary cosine wave and sine wave to divide information sent from the oscillator 4 into acoustic pressure components and phase components, and they are inputted to a microcomputer 6, and the existence, the position, and the shape of the two-dimensional object are obtained in accordance with measured values of the scattered wave. |
