| 摘要 |
PURPOSE: The supersonic output method of measurement reduces the measurement error by the naked eye finding the maximum output position of the ultrasonic wave through the visible flow layer method or the schlieren method. CONSTITUTION: In order to measure the output of the ultrasonic wave, the ultrasonic wave is emitted in the inside storing the water(W) of the water tub(110). The maximum output position of the ultrasonic wave is detected by using the refractive index change of the saved water inside cistern. The output of the ultrasonic wave is measured at. The maximum output position of the ultrasonic wave is detected by using the schlieren method.
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