Communications: electrical – Continuously variable indicating – With meter reading
Patent
1994-06-14
1997-04-08
Mullen, Thomas
Communications: electrical
Continuously variable indicating
With meter reading
34087018, 34087031, 34082554, 324103R, 324142, 364483, G08B 2308
Patent
active
056191928
ABSTRACT:
An electronic meter reader having a transmitter and antenna for inductively transmitting alternating current power in any selected one of a plurality of frequencies. The reader further includes a receiver for inductively receiving meter reading data from the meter being read represented by a load modulation of the transmitted frequency. A bandpass filter limits the bandwidth of the modulation frequency. The power transmitted by the transmitter may also be used by the meter to generate and transmit data representative of the meter reading back to the reader. A second receiver is also provided for inductively receiving reading data from the meter in the form of a modulated frequency generated by the meter. The reader includes a microprocessor and program which control the generation of a plurality of interrogation signal formats, and which decode a plurality of received data formats.
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Article by Pravdic et al. (Microcomputer System for Pulse Data Acquisition, Recording, Local Processing and Remote Data Trasmission, IECON '86 Sep. 29-Oct. 3, 1986, vol. 1, pp. 327-332).
Logicon, Inc.
Mullen Thomas
Wu Daniel J.
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