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Proximity switch, which indicates the presence or absence of field changing objects at a defined distance from the proximity switch by a binary signal with the aid of excitation and detection of a field
Proximity switch, which indicates the presence or absence of field changing objects at a defined distance from the proximity switch by a binary signal with the aid of excitation and detection of a field
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机译:接近开关,借助磁场激励和检测,通过二进制信号指示在距离接近开关一定距离处是否存在场变化物体
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摘要
A multi-position proximity switch having a plurality of binary outputs, each output indicating whether the distance between an object and a field transducer exceeds a corresponding one of a plurality of predefined distances. The sensitivity of a proximity detector having a single binary output is stepped through a plurality of adjustable levels by a digital counter having decoded outputs and the binary output of the proximity switch is sampled after the decoded counter outputs change state so that a plurality of binary outputs, each associated with a detector sensitivity level and a corresponding distance, are provided. The failure of the greatest distance to be detected or the detection of the smallest distance activates an alarm indicating that the object is outside a permissible range of distances.
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