本文介绍一种测量B型线阵超声显象仪输出平均声功率的新型超声功率计,由全反射矩形槽式靶体、悬链、水槽、吸声材料,除气水和光学读数系统组成,在0.2-150mw范围内,该装置的灵敏度为0.045mm/mw,其重复性误差是2.4％(置信度99.73％) This paper introduces a new ultrasonic power meter to measure the output average power of B-type linear ultrasonic detector. It consists of total reflection rectangular trough target, catenary, water tank, sound absorbing material, deaerated water and optical reading system. In the range of 0.2-150mw, the sensitivity of the device is 0.045mm / mw, the repeatability error is 2.4% (confidence is 99.73%)