Alarm system and method for detecting proximity of an object to electrical power lines
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United States of America Patent
Stats
-
Jun 23, 1987
Issued Date -
N/A
app pub date -
Apr 7, 1986
filing date -
Oct 26, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An antenna receives, by capacitive effect, a current of which the intensity is a function of the distance separating the antenna from an electrical power line. The other factors that influence the current are fixed, constant or are considered negligible. A measuring and conditioning circuit converts the current at the output of the antenna into a coded signal and transmits this coded signal to a control unit. The control unit compares the coded signal to predetermined values stored therein. Alarms are generated by the control unit when the current from the antenna exceeds the predetermined values.
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