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目前,在自动化控制系统中都广泛地使用了接近开关、光电开关、超声波开关等传感器作为自动化的检测元件。当今时代的传感器体现了微电子、光电学、超声波等高新技术的最新水平,其功能品质已绝非早先的接近开关之类的传感器所能比拟。
At present, sensors, such as proximity switches, photoelectric switches, ultrasonic switches and the like, are widely used as automatic detection elements in automatic control systems. Sensors of today’s era reflect the latest levels of high-tech technologies such as microelectronics, optoelectronics, and ultrasound. Their functional qualities are by no means comparable to earlier sensors such as proximity switches.