Remote utility meter reading system

• US 5,801,643 A
• Filed: 02/20/1997
• Issued: 09/01/1998
• Est. Priority Date: 06/20/1996
• Status: Expired due to Term

• Current Assignee: Northrop Grumman Systems Corporation (Northrop Grumman Corporation)
• Original Assignee: Northrop Grumman Corporation
• Inventors: Jensen, James, Williams, Roger B., Guthrie, Warren E., Szmurlo, Thomas E.
• Primary Examiner(s): Horabik, Michael
• Assistant Examiner(s): EDWARDS JR, TIMOTHY
• Application Number:
  US08/801,407
• Time in Patent Office: 558 Days
• Field of Search: 340/870.02, 340/870.18, 340/870.26, 375/206, 375/200, 455/71, 370/320
• US Class Current: 340/870.02
• CPC Class Codes: G01D 4/004 Remote reading of utility meters to a fixed location
• CPC Class Codes: G01R 22/00 Arrangements for measuring time integral of electric power or current, e.g. electricity meters
• CPC Class Codes: G06K 17/0022 arrangements or provisious for transferring data to distant stations, e.g. from a sensing device "transfer between computer elements G06F13/00 "; data-transmission H04L
• CPC Class Codes: G06K 19/0716 at least one of the integrated circuit chips comprising a sensor or an interface to a sensor
• CPC Class Codes: G06K 7/0008 General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
• CPC Class Codes: G06K 7/10059 transponder driven
• CPC Class Codes: G06K 7/10356 using a plurality of antennas, e.g. configurations including means to resolve interference between the plurality of antennas
• CPC Class Codes: G06Q 10/087 Inventory or stock management, e.g. order filling, procurement or balancing against orders
• CPC Class Codes: G08C 17/02 using a radio link
• CPC Class Codes: H04Q 2209/40 using a wireless architecture
• CPC Class Codes: H04Q 2209/60 for transmitting utility meters data, i.e. transmission of data from the reader of the utility meter
• CPC Class Codes: H04Q 9/00 Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
• CPC Class Codes: Y02B 90/20 Smart grids as enabling technology in buildings sector smart grids supporting the management or operation of end-user stationary applications in general, or like technologies with no associated climate change mitigation effect Y04S20/00
• CPC Class Codes: Y04S 20/30 Smart metering, e.g. specially adapted for remote reading

Abstract

In a method for transmitting a desired parameter to a remote location, the desired parameter is first communicated to a base transmitter. Then, the base transmitter transmits a first radio signal therefrom having an unknown center frequency within a known frequency band. The first radio signal comprises information representative of the desired parameter. At a remote location, a remote receiver identifies the center frequency of the first radio signal and tunes the remote receiver to the center frequency thereof so as to facilitate reception of the first radio signal with the remote receiver. The information representative of the desired parameter may then be communicated to a desired destination.

Claims

1. A method for transmitting a desired parameter from a base station to a remote location, the method comprising the steps of:

a) transmitting a first radio signal via pulse position modulation from the base transmitter to a relay transceiver disposed at a location intermediated the base station and the remote location;

b) receiving the first radio signal with the relay transceiver; and

c) relaying the data via direct sequence spread spectrum modulation from the relay transceiver to the remote location.

2. The method as recited in claim 1, further comprising the step of transmitting a second radio signal from the remote location to the base station, the second radio signal comprising instructions for regulating operation of at least one device.

3. The method as recited in claim 1, wherein the step of transmitting a first radio signal comprises transmitting a first radio signal having a duration of less than approximately 100 milliseconds so as to mitigate communications contention.

4. The method as recited in claim 1, further comprising the steps of:

a) compressing data representative of the desired parameter;

b) storing the compressed data; and

c) transmitting the compressed data to a desired location via telephone at a time when telephone rates are favorable.

5. The method as recited in claim 1, wherein the step of transmitting a first radio signal comprises transmitting a first radio signal representative of a utility meter reading.

6. A system for transmitting a desired parameter from a base station to a remote location, the system comprising:

a) a base transmitter disposed at the base station and configured to transmit a first radio signal via pulse position modulation to a relay transceiver disposed at a location intermediated the base station and the remote location; and

b) a relay transceiver configured to receive the pulse position modulated first radio signal and to relay the data via direct sequence spread spectrum modulation from the relay transceiver to the remote location.

7. The system as recited in claim 6, wherein the relay transmitter is configured to transmit a second radio signal from the remote location to the base station, the second radio signal comprising instructions for regulating operation of at least one device.

8. The system as recited in claim 6, wherein the base transmitter is configured to transmit a first radio signal having a duration of less than approximately 100 milliseconds so as to mitigate communications contention.

9. The system as recited in claim 6, further comprising:

a) a circuit for compressing data representative of the desired parameter; and

b) a memory for storing the compressed data;

c) wherein compressing and storing the data facilitate subsequent transmission of the compressed data to a desired location via telephone at a time when telephone rates are favorable.

10. The system as recited in claim 6, wherein the base transmitter is configured to transmit a first radio signal representative of a utility meter reading.