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国家地震局科技监测司组织地震系统及北京大学、云南大学、中国科学院地球物理研究所等单位的专家教授于1987年11月2日对广东省地震局技术室刘昌谋、李小宏、廖元盛等研制的自动换挡集成化地震仪放大器(简称ARA)进行了审核鉴定。该放大器具有噪声低、放大倍数高、稳定性好、体积小、耗电少、维修方便、成本低的持点,同时还能进行增益自动
State Seismological Bureau, Department of Science and Technology Monitoring and Seismology Department of Earthquake Systems and Peking University, Yunnan University, Institute of Geophysics, Chinese Academy of Sciences and other units of experts and professors on November 2, 1987 on the Earthquake Administration of Guangdong Technology Room Liu Changmou, Li Xiaohong, Liao Yuansheng developed automatic Shift Integrated Seismograph Amplifier (referred to as ARA) were reviewed and appraised. The amplifier has low noise, high magnification, good stability, small size, low power consumption, easy maintenance, low cost holding point, but also for automatic gain