| 摘要 |
PROBLEM TO BE SOLVED: To solve the subject that alignment with an object to be measured takes time and effort. SOLUTION: This electromagnetic interference wave measuring apparatus is equipped with an ultrasonic echo sounder receiver 14 installed on a magnetic field probe 20, and three or more ultrasonic transmitters 15-17 for discharging ultrasonic waves to the receiver 14. Three-dimensional position measurement of the probe 20 is performed from a landing time of the ultrasonic waves from the three or more transmitters 15-17 to the receiver 14. COPYRIGHT: (C)2004,JPO
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