Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1994-07-22
1996-08-20
Peng, John K.
Communications: electrical
Condition responsive indicating system
Specific condition
340660, 340654, 324256, 324117R, 324253, 324255, G08B 2100
Patent
active
055482791
ABSTRACT:
A method and apparatus for detecting power lines including a pickup coil for detecting the magnetic field generated by the current conducted by a power line and for producing a sense current in response to the detected magnetic field, a gyrator circuit for generating a sense voltage in response to the sense current and tuning means for producing an output voltage in response to the sense voltage such that a power line can be detected thereby. The tuning means also tunes the power line detecting apparatus to the predetermined frequency of the current conducted by the power lines. The power line detecting method and apparatus also preferably analyzes the magnitude and frequency of the output voltage produced by the tuning means so as to distinguish output voltages generated in response to the magnetic fields produced by power lines from those generated by extraneous electromagnetic noise. In addition, the power line detecting method apparatus can also determine the direction of the detected power lines by sampling successive output voltages as the power line detecting apparatus moves relative to the located power line such that movement of the power line detecting apparatus in a direction generally toward the located power line is detected and a warning or alarm can be produced.
REFERENCES:
patent: 3418572 (1968-12-01), Humphreys, Jr.
patent: 4064997 (1977-12-01), Holland et al.
patent: 4277771 (1981-07-01), Chapin et al.
patent: 4649375 (1987-03-01), Duppong et al.
patent: 4714915 (1987-12-01), Hascal et al.
patent: 5343177 (1994-08-01), Williams
Adel S. Sendra and Kenneth C. Smith, Microelectronic Circuits, 1982, pp. 80-90.
Roger Melen and Harry Garland, Understanding IC Operational Amplifiers, 1982, pp. 100-101.
Lieu Julie B.
McDonnell Douglas Corporation
Peng John K.
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