| 摘要 |
PURPOSE:To achieve a higher performance of the distance amplitude compensation by selecting sound velocity with parallel setting devices to performing sensitivity slopes corresponding thereto after starting and stopping positions are set for a distance amplitude compensation circuit. CONSTITUTION:Setting device 5-1-5-n are operated in the mm. unit with a switch for setting the positions of starting and stopping a distance amplitude compensator to select clock A signal 2, B signal 3 and C signal 4 in counters 6-1 and 6- 2 with the selection of sound velocity and then, input the signals to a multitriggering circuit 7. A sensitivity curve is outputted by turning ON or OFF slope generation circuits 8-1-8-n according to a trigger signal of the circuit 7 and after converted into analog with a D/A converter 9, it is amplified and outputted (a) with an amplifier 10. With such an arrangement of a circuit, the selection of sound velocity can be done for various object to be inspected broad or deep in the inspection range and intermediately changeable in the material quality thereby enabling compensation of distance amplitude in the mm. unit of distance range and ultimately providing an echo of the same height. |
