| 摘要 |
PCT No. PCT/FR93/00372 Sec. 371 Date Dec. 16, 1993 Sec. 102(e) Date Dec. 16, 1993 PCT Filed Apr. 14, 1993 PCT Pub. No. WO93/21614 PCT Pub. Date Oct. 28, 1993.A system for surveillance of a mobile or movable object is placed in a surveillance enclosure. The system includes and it comprises a transmitter/receiver circuit for first and second object-monitoring signals (sco1, sco2). The first and second signals monitor the presence of the object and the position of the object respectively. A transmission circuit is provided for transmitting an alarm-triggering signal. The transmission circuit receives the first and second object-monitoring signals and enables an alarm-triggering signal (sda) to be transmitted conditionally on the basis of a logical and/or analog combination of the first and second object-monitoring signals. The invention is applicable to surveillance of valuables or of works of art.
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