Selective monitoring unit with object to be monitored carrying transmitter

Selective monitoring unit with object to be monitored carrying transmitter

The transmitter has a modulator which modulates the pulse sequence to a HF transmission signal, and the receiver input stage is tuned to the reception of the signals radiated from the transmitter. Also included is a demodulator (24), a decoder and an evaluation unit for evaluating these sequences. A...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: SCHANDER, JURY, 84579 UNTERNEUKIRCHEN, DE, LEWIN, STEPAN, 10318 BERLIN, DE
Format: Patent
Sprache:eng ; ger
Schlagworte:
ALARM SYSTEMS
ORDER TELEGRAPHS
PHYSICS
SIGNALLING
SIGNALLING OR CALLING SYSTEMS
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Beschreibung
Zusammenfassung:The transmitter has a modulator which modulates the pulse sequence to a HF transmission signal, and the receiver input stage is tuned to the reception of the signals radiated from the transmitter. Also included is a demodulator (24), a decoder and an evaluation unit for evaluating these sequences. A regulating amplifier (17) is preconnected to the demodulator (24) in the receiver (5), for the evaluation of the pulse sequence (30) identified as correct. A computer (27) is provided for making a decision to give an alarm. A correlation measuring system (25) is interposed between the amplifier (23), the demodulator, the decoder (26) and the computer (27).