Low-powered remote sensor

Details Low-powered remote sensor Low-powered remote sensor

1988-04-29

1990-01-09

George, Keith E.

Telephonic communications

Telephone line or system combined with diverse electrical...

Having transmission of a digital message signal over a...

379107, 379413, 34087002, H04M 1100

Patent

active

048933325

ABSTRACT:
A low-powered remote sensor is achieved by capacitively isolating a long duration perpetual timer which is powered by removing inductively coupled AC power from telephone lines or other long lines. Three embodiments are described using this concept. The first embodiment is a remote utility sensor designed to periodically dial and transmit data to a central site via telephone lines and report its functionality on a periodic basis. The second embodiment of the remote utility sensor is used for reporting utility usage for common utilities such as gas meters, water meters, electric meters and water softeners on a periodic basis over telephone lines. The third embodiment is a remote utility sensor which continually records utility usage and can be read by a portable recording device through a remote cabled interface.

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Terry L. Lyon, "How to Build `Free-Power` Radios", Popular Electronics, Oct. 1973, pp. 62-64.
"Local Battery Charging Over Subscriber's Lines", by B. R. Freer and O. L. Matthews, The Post Office Electrical Engineer's Journal, vol. 66, Part 2, Jul. 1973.

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