| 摘要 |
<p>An electrical alarm system, which responds to improper and/or unsafe loading of a fork-lift truck or other load-sustain-ing apparatus equipped with a suitable sensing transducer, is controlled by a high-gain electronic differential switch whose comparisons of reference and sensing-transducer electrical signals are uniquely improved by a combination of: (a) unidirectionally-positive feedback which produces a dynamic transient hysteresis effect; (b) steady-state feedback or hysteresis which prevents false triggering of the system by ambient noise and vibration; (c) a regulator and electrical interference suppression network; and (d) low-level high-frequency partial filtering of oscillations in the waveform of sensing-transducer output signals. Failsafe system operation is assured by network connections and output actuations which prevent the handling of loads when system cabling is disabled, as well as when overloading is sensed.</p> |
