Method and apparatus for extending the operating range of a condition monitoring system

摘要

Apparatus and method for extending the operating range of a condition monitoring system that detects the occurrence of an abnormal condition on a first member moving relative to a second member; the system including a sensor circuit on the first member adapted to be responsive to the condition being monitored and a monitoring circuit on the second member adapted to being affected by the proximate presence of a close-circuited sensor circuit to provide detection signals to circuit means for indicating the condition of the moving member indicative of the open or close-circuited sensor circuit. The system is characterized by a monitoring circuit operating at the threshold of an oscillatory and nonoscillatory state and a close-circuited sensor circuit configuration that affects the monitoring circuit irrespective of its operational state.