| 摘要 |
<p>PURPOSE: To prevent an inaccurate sensing result from being made due to inter nal loss of a resonance circuit. CONSTITUTION: An inductive proximity sensor includes a power supply and a coil 2. The power supply supplies a periodic current to the coil 2, and its conduction time interval is shorter than a feeding time interval. A response of an object to be detected is measured at a time interval, when the current flowing to the coil 2 is essentially zero.</p> |
