Pulsed microwave motion sensor for intrusion detection applicati

Details Pulsed microwave motion sensor for intrusion detection applicati Pulsed microwave motion sensor for intrusion detection applicati

1980-06-20

1982-03-30

Caldwell, Sr., John W.

Communications: electrical

Condition responsive indicating system

Specific condition

340552, 343 5PD, 343 171PF, 367 94, 367901, G01S 1356, G08B 1318

Patent

active

043227228

ABSTRACT:
An intrusion detection apparatus including a sensor for sensing an objectionable interference phenomenon within a detection area and developing a pulse train coincident therewith, signal processing circuitry responsive to the pulse train and operation to actuate a Gunn diode microwave generator or the like in a pulsed manner causing it to transmit microwave energy into the detection area in synchronism with the interference phenomenon, a microwave receiver for detecting microwave energy reflected from the detection area and for developing detection signals indicating motion within the monitored area, and further signal processing circuitry responsive to the detection signal and operative to actuate an alarm or the like.

REFERENCES:
patent: 2779935 (1957-01-01), Loudon et al.
patent: 3866198 (1975-02-01), Cohen
patent: 3925687 (1975-12-01), Solomon
patent: 4028690 (1977-06-01), Buckley et al.
patent: 4072944 (1978-02-01), Bianco et al.

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