| 摘要 |
PURPOSE:To make it possible to perform the checking of unsealing and the discrimination of an individual by one measuring operation and to improve efficiency of measuring work, by forming defective parts on a path of an ultrasonic wave or its reflected wave from the individual to be discriminated, and measuring the disturbance in the reflected wave. CONSTITUTION:A part of the path of an ultrasonic wave or its reflected wave from a body 1, e.g., a central constricted part of the body 1, is made to be a welding part 2. Defect 3 are yielded by the welding. The ultrasonic wave is applied for checking unsealing. The unsealing check can be performed by the presence of the reflected wave from the bottom of the body 1. At the same time, the body 1 as an individual can be discriminated by discriminating the complicated waveform of the reflected wave, which is yielded by the disturbance of the reflected wave due to the defects 3. In order to enhance the accuracy of discrimination, two welding parts 2a and 2b and defective parts 3a and 3b are provided on the body 1 and the reflected waves can be measured. Even though the welding parts 2 and the defective parts 3 are provided at two places, the range of the defective parts 3 is expanded by making the thickness of the welding parts thick, and the sufficient individual discriminating ability can be obtained. |
