| 摘要 |
The invention relates to an active sensor used in automation, in alarm and safety systems, in order to detect and signal out both mechanical vibrations and the increase of the current absorbed by certain consumers in a surveyed system. According to the invention, the sensor comprises a piezoelectric transducer (1), a filtering and amplifying unit (A), an evaluating signal unit (B), a pulse forming circuit (C), a one-kick multivibrator (D), a ratchet circuit (E), a buffer control circuit (F), a global feedback loop(G), a unit for filtering and stabilizing the control voltage (H) and a circuit for the optical signalling of the supply voltage (1).
|
