Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1984-02-06
1986-01-21
Rowland, James L.
Communications: electrical
Condition responsive indicating system
Specific condition
340554, 343 65R, G08B 1314
Patent
active
045659966
ABSTRACT:
A time limited coherent frequency doppler radar system monitors a precisely bounded merchandise detection zone for motion of a transducer therein. False alarms are reduced without limiting sensitivity by limiting the maximum radar signal propogation times to control the outer boundaries of the detection region and by requiring a selected minimum motion within the detection zone. An even more precisely bounded merchandise surveillance zone can be realized by using two spaced-apart radar systems having overlapping detection zones.
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Skolnick, Introduction to Radar Systems, McGraw-Hill Book Co., 2nd Ed. 1980, pp. 68-98 and 117-119.
Hofsass Jeffery A.
Israel Mrs. Lawrence
Rowland James L.
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