To distinctly find out the relationship between the rigidity of tablet and the ultrasonic speed,laser is emitted to the tablet and then we measure the speed of reflected surface acoustic wave and analyse the experimental data,finally get the tablet rigidity-wave speed curve.Experiments show that the speed will be slower and slower with the increasing rigidity of the tablet.The study is of reference value in tablet nondestructive testing or quick testing online,etc.
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占惠星,严盈富,唐长清,胡海智.激光超声波无损检测片剂硬度方法的研究[J].激光与红外,2010,40(4):349~353 ZHAN Hui-xing, YAN Ying-fu, TANG Chang-qing, HU Hai-zhi. Nondestructive tablet hardness testing by a new laser ultrasonic method[J]. LASER & INFRARED,2010,40(4):349~353