| 摘要 |
PURPOSE:To judge surely and in a short time transmission preventing performance of a molding having a barrier layer without destroying the molding. CONSTITUTION:An ultrasonic probe 1 is set on a molding X having a barrier layer, an ultrasonic pulse oscillated from an ultrasonic pulse oscillating device 2 is given to the ultrasonic probe 1 and sent to the molding X from the ultrasonic probe 1, and then, a reflected wave reflected in the molding X is received by the ultrasonic probe 1. This reflected wave is taken in a control circuit 6 through a high pass filter 3, a high-frequency amplification circuit 4 and an A/D converter 5, and its area is calculated. The calculated area is converted to a transmission preventing performance in the molding X in a calibration curve memory part 7, and the result is displayed at a transmission amount judgment result display part 8 and stored in a transmission amount judgment result memory part 9. |
