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CX-11型系四川省绵阳电子仪器厂产品,为机械扇扫超声显像仪。这种仪器,由于换能器一直处于机械运动中,其引出线常因振动而脱焊。作者在仪器中装一控制扫描开关的电路,使换能器只在探头操作时作左右摆动,改善了换能器的工作条件,使脱焊故障大为减少。控制电路由单稳电路、继电器和微动开关等组成,其线路图如图①所示。继电器
CX-11-type Department of Mianyang, Sichuan Province, electronic equipment factory products, mechanical fan scan ultrasound imaging. This instrument, due to the transducer has been in mechanical movement, the leads often due to vibration and desoldering. The author installs a circuit in the instrument to control the scanning switch so that the transducer can only swing left and right when the probe is operated, which improves the working conditions of the transducer and greatly reduces the failure of the welding. Control circuit consists of a single-stable circuit, relays and micro-switches and other components, the circuit diagram shown in Figure ①. Relay