| 摘要 |
PURPOSE:To image the shape of an object from the relation with the previously calculated distance, by emitting ultrasonic waves to calculate the distance up to the object from the relation of a rotation angle and the intensity of the reflected echo while calculating the position of one sensor from the signal of a sensor scanning apparatus side. CONSTITUTION:Ultrasonic waves are emitted from a sensor 1 at a constant cycle and the echo from an object 6 is monitored. A scanning arm 7 is rotated around a drive shaft 9 and the position and direction of the sensor 1 are calculated from the rotary angle of a scanning motor 5 and that of a rotation motor 8. A rotation angle thetaMAX for maximizing the intensity of the echo is detected and the time tau between transmission and reception is calculated on the basis of the detection value and the distance (l) up to the object is operated by operators 13, 14. The position of the sensor 1 is calculated from the signal of a sensor scanning apparatus side (for example, a motor rotary angle) and the shape of the object is formed into an image from the relation with the previously calculated distance (l). By this method, the curve surface structure in an opaque liquid metal such as Na can be formed into an image with high reliability. |
