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1981年12月9～12日,在第二机械工业部举行的鉴定会上,JCZ-1型金属棒晶粒度超声自动检测装置通过鉴定。该装置采用超声穿透方式。超声频率5兆赫,线聚焦换能器发出钟形包络的高频声脉冲。经接收通道的对数转换后,仪器输出与被测棒材的晶粒度成线性关系。检测速度为棒材表面线速度1000毫米/秒。脉冲重复频率2000赫。检测数据由计算机进行在线实时处理,处理结果以数字形式显示和打印。除可测量
From December 9 to December 12, 1981, at the appraisal meeting held by the Second Ministry of Machinery Industry, JCZ-1 metal grain size grain ultrasonic automatic testing device passed the appraisal. The device uses ultrasonic penetration. Ultrasound frequency 5 MHz, line focus transducer bell-shaped envelope of high-frequency sound pulse. After the logarithmic conversion of the receiving channel, the output of the instrument is linear with the grain size of the rod under test. Detection speed of bar surface line speed of 1000 mm / sec. Pulse repetition frequency of 2000 Hz. The test data are processed online by the computer in real time, and the processing result is displayed and printed in digital form. In addition to measurable