Two hand operated machine control station using capacitive proximity switches

作者： Keith D. Wheeler , Stanley H. Edwards

DOI:

关键词: Capacitive sensing 、 Machine control 、 Electromagnetic interference 、 Engineering 、 Proximity sensor 、 Electronic engineering 、 Electrical engineering 、 State (computer science) 、 Isolation transformer 、 Electronic circuit 、 Power (physics)

摘要: A machine operator control station circuit which uses capacitive proximity switches to replicate the function of mechanical used in prior art stations. monitoring for "on" state a two hand industrial is disclosed. The also reduces chance unintended operation being controlled as result emitted or conducted radio frequency interference might be detected by switches. An isolation transformer provides an isolated power supply circuit. includes first switch detecting presence one operator's hands, and second other hands. Each has length time remains activated state. circuits are connected together such that both must within set window order activate