Alarm transmission system
AssigneeAgence Centrale de Services (ACDS)
InventorsPierre A. A. A. Morel, Marc P. L. Pittavino
Life of this patent
Estimating the term…
Abstract
An alarm transmission system with portable receivers for watching a site, which system comprises a plurality of portable and removable autonomous detection units, a plurality of portable autonomous receiving modules capable of releasing signalling or warning means incorporated to the said receiving modules upon receipt of signals sent by a transmission unit and a central information-receiving and processing unit equipped with at least one receiving module, and in which system the signal transmission unit is constituted on the one hand by radio-transmission and coding means associated to each detection unit and on the other hand by means of reception by radio-link and decoding means incorporated to each portable receiving module.
Claims13
An alarm transmission system, comprising a plurality of removable and portable autonomous detection units distributed in a space divided into zones, each unit equipped with detectors capable, when activated of generating electrical signals;
- transmission means in each detection unit for transmitting the signals generated by said detectors, said transmission means comprising means for coding and radio-transmitting binary information which is frequency modulated on a carrier frequency;
- and means for permanently maintaining a strict phase relationship between the carrier frequency and the binary information signal transmitted by the transmission means;
- a plurality of autonomous portable receiving modules for receiving the signal transmitted by said detection units, each said receiving module being equipped with radio-receiving and decoding means as well as signalling or warning means capable of being activated upon receipt of the signals sent by the detection units and a central information-receiving and processing unit equipped with at least one such receiving module.
An alarm transmission system comprising:
- (a) a set of portable autonomous detection units distributed in a space divided into zones, said units having detectors capable of generating electrical signals upon being activated;
- (b) transmission means in each detection unit for transmitting the signals generated by said detectors, said transmission means comprising means for coding and means for radio-transmitting binary information corresponding to said signals in frequency modulated form on a carrier frequency;
- (c) a plurality of autonomous portable receiving modules remote from said detection units for receiving the signals transmitted by detection units, each receiving module comprising:
- (i) means for receiving said transmitted information;
- (ii) means for decoding said transmitted information;
- and
- (iii) signalling or warning means which may be activated upon receipt of said transmitted information;
- and
- (d) a central information-receiving and processing unit equipped with at least one said receiving module, said receiving modules capable of being temporarily plugged into said central information-receiving and processing unit for direct interaction therewith.
Dependencies are inferred from the claim text.