日本工人赠送给中国机械工人访日代表团的摩擦音监听器(Grindpho-nic),是由日本西铁城时计株式会社制造的。这种摩擦音监听器,能监听微弱的摩擦音,对“嘶嘶”的尖音尤为灵敏。日本工人是用来判别精磨时砂轮是否接触工件。我们(北京轴承研究所)对该监听器进行了测试分析,并根据其性能特点,结合我国实际情况,进行了试制,样机的性能与日本的相近,现将摩擦音监听器的原理、构造及其电路系统做如下介绍。 Grindpho-nic, a Japanese worker’s donation to a visiting Chinese delegation to a Chinese mechanized worker, was manufactured by Citizen Time Inc., Japan. This fricative monitor, which monitors weak fricatives, is particularly sensitive to “hissing” sounds. Japanese workers are used to determine the grinding wheel is in contact with the workpiece. We (Beijing Institute of Bearing) conducted a test analysis of the monitor, and according to its performance characteristics, combined with the actual situation in our country, conducted a prototype, prototype performance similar to Japan, the fricative sound monitor now principle, structure and its Circuit system to do the following introduction.