Call in-bound remote reading and data collection system

• US 5,434,911 A
• Filed: 06/04/1993
• Issued: 07/18/1995
• Est. Priority Date: 06/04/1993
• Status: Expired due to Term

• Current Assignee: M&FC Holding, LLC (Xylem, Inc.)
• Original Assignee: M&FC Holding, LLC (Xylem, Inc.)
• Inventors: Fletcher, Donald R., Gray, Bruce E.
• Primary Examiner(s): Kuntz, Curtis
• Assistant Examiner(s): Woo, Stella L.
• Application Number:
  US08/072,737
• Time in Patent Office: 774 Days
• Field of Search: 379/106, 379/107, 379/102, 379/104, 379/39, 379/40, 340/870.02
• US Class Current: 379/106.06
• CPC Class Codes: H04M 11/002 with telemetering systems telemetering in general G08C

Abstract

A call in-bound remote reading and data collection system for the remote reading of utility meters, including a data processor and a remotely located meter interface unit (MIU) interconnected to at least one utility meter to be read. Also disclosed is a meter interface unit and a method for the remote reading of utility meters and the collection of data. The data processor collects, stores and processes data and includes a modem to interconnect the data processor to conventional telephone lines. The MIU is interconnected to the telephone lines and the data processor, to transmit scheduled meter reading to the data processing means, when a prespecified interval has elapsed. The MIU is also interconnected to transmit unscheduled or demand meter readings when the MIU receives telephone line transmissions requesting such a reading (e.g. receipt of a specified tone). A modem is used to interconnect the MIU so it can communicate over the telephone lines. The MIU includes a microprocessor that generally controls the operation of the MIU and supervises the transfer of data between the data processor and the meter interface unit. Specifically the microprocessor processes commands from the data processor and outputs data, in response to the commands received, to the data processor.

Claims

1. A call in-bound remote reading and data collection system for the remote reading of utility meters, comprising:

data processing means for collecting, storing and processing data, said data processing means further including means for interconnecting said data processing means to conventional telephone lines;

a meter interface unit remotely located from said data processing unit and being interconnected to at least one meter to be read; and

wherein said meter interface unit further includes;

elapsed time determining means for determining when a prespecified amount of time, an elapsed time interval, has elapsed, where one elapsed time interval is prespecified for making a scheduled automatic reading of the meter and another time interval is prespecified for making an unscheduled reading of the meter;

phone line monitoring means for monitoring the telephone lines for telephone line transmissions;

demand read means, responsive to said phone line monitoring means, for evaluating telephone line transmissions and determining when the telephone line transmissions indicate that the meter interface unit is to interconnect to the data processing means for the unscheduled reading of the meter;

means for interconnecting said meter interface unit to said data processing means for communication and data transfer between said data processing means and said meter interface unit, where said meter interface unit is interconnected to said data processing means via the telephone lines when the elapsed time interval for making a particular meter reading is determined to have elapsed by said elapsed time determining means; and

command and data processing means for processing commands from said data collection means and for outputting data, in response to the commands received, to said data collection means.

2. The call in-bound remote reading and data collection system of claim 1, wherein said meter interface unit includes a power supply means for selectively powering the meter interface unit during specified periods of meter interface unit activity.

3. The call in-bound remote reading and data collection system of claim 2, wherein said meter interface unit further includes timing means for periodically outputting a signal that is representative of a period of time;

wherein said demand read means further includes tone sensing means for monitoring the telephone lines for the presence of a prespecified tone; and

wherein said power supply means provides power to said tone sensing means each time a timing means output signal is received by said power supply means.

4. The call in-bound remote reading and data collection system of claim 3, wherein said demand read means further includes a ring demand means for monitoring the telephone line for the presence of ring bursts indicative of an incoming phone call and for determining if the number of ring bursts exceeds a prespecified value.

5. The call in-bound remote reading and data collection system of claim 4, wherein said meter interface unit further includes a power control means, responsive to the output signals from said timing means, for controlling said power supply so said command and data processing means is powered up after a prespecified time interval has elapsed and wherein said command and data processing means is powered up when it is determined that the elapsed time interval has elapsed.

6. The call in-bound remote reading and data collection system of claim 5, wherein said command and data processing means further includes time interval determining means for determining the prespecified time interval for said power control means.

7. The call in-bound remote reading and data collection system of claim 6, wherein the time interval determining means determines the prespecified time interval for periodically powering said command and data processing means based on the time which has elapsed and the elapsed time interval for interconnection.

8. The call in-bound remote reading and data collection system of claim 5, wherein said command and data processing means further includes callback determining means both for determining when an interconnection between said meter interface unit and said data collection means is unsuccessful and for determining the elapsed time interval for making another interconnection.

9. The call in-bound remote reading and data collection system of claim 8, wherein said callback determining means determines when to make another interconnection based on the data being transmitted and how many interconnections between said meter interface unit and said data processing means have been attempted.

10. The call in-bound remote reading and data collection system of claim 9, wherein said data processing means is provided with a plurality of different telephone numbers and wherein said command and data processing means selects one of the plurality of phone numbers for said meter interface unit interconnecting means to dial.

11. The call in-bound remote reading and data collection system of claim 8, wherein said meter interface unit further include telephone line status monitoring means for monitoring the telephone lines to determine if the telephone line is in use before said meter interface unit interconnects to said data processing means, where an interconnection is made when said line status monitoring means determines that the telephone lines are free and wherein said callback determining means determines the elapsed time interval for making another interconnection when said line status monitoring means determines that the telephone lines are busy.

12. The call in-bound remote reading and data collection system of claim 11, wherein said command and data processing means further includes timeout means for breaking the interconnection between said meter interface unit and said data processing means when a predetermined amount of time has elapsed since the transmission of information from said meter interface unit and wherein said callback determining means determines the elapsed time interval for making another interconnection when the predetermined amount of time has elapsed.

13. The call in-bound remote reading and data collection system of claim 12, wherein said command and data processing means further includes a meter interface connection that interconnects the meter to be read and said command and data processing means, wherein said meter interface connection is powered by said power supply in response to commands from said command and data processing means.

14. The call in-bound remote reading and data collection system of claim 13, wherein said power supply is batteryless.

15. The call in-bound remote reading and data collection system of claim 13, wherein said power supply includes a battery.

16. A call in-bound meter interface unit being interconnected to at least one utility meter to be read and for communicating data to a data processing means via conventional telephone lines, comprising:

elapsed time determining means for determining when a prespecified amount of time, an elapsed time interval, has elapsed, where one elapsed time interval is prespecified for making a scheduled automatic reading of the meter and another time interval is prespecified for making an unscheduled reading of the meter;

phone line monitoring means for monitoring the telephone lines being used for telephone line transmissions;

demand read means, responsive to said phone line monitoring means, for evaluating telephone line transmissions and determining when the telephone line transmissions indicate that an interconnection is to be made with the data processing means for the unscheduled reading of a meter;

means for interconnecting said command and data processing means to said data processing means for communication and data transfer between said data processing means and said command and data processing means, where said command and data processing means is interconnected to said data processing means via the telephone lines when the elapsed time interval for making a particular meter reading is determined to have elapsed by said elapsed time determining means; and

command and data processing means, responsive to said elapsed time determining means and said demand read means, for processing commands from the data collection means and for outputting data, in response to the commands received, to the data collection means.

17. The call in-bound meter interface unit of claim 16, further including a power supply means for selectively powering the meter interface unit during specified periods of meter interface unit activity.

18. The call in-bound meter interface unit of claim 17, further including:

timing means for periodically outputting a signal that is representative of a period of time;

wherein said demand read means further includes tone sensing means for monitoring the telephone lines for the presence of a prespecified tone;

and wherein said power supply means provides power to said tone sensing means each time a timing means output signal is received by said power supply means.

19. The call in-bound meter interface unit of claim 18, wherein said demand read means further includes a ring demand means for monitoring the telephone line for the presence of ring bursts indicative of an incoming phone call and for determining if the number of ring bursts exceeds a prespecified value.

20. The call in-bound meter interface unit of claim 19, further including a power control means, responsive to the output signal from said timing means, for controlling said power supply so said command and data processing means is powered up after a prespecified time interval has elapsed and wherein said command and data processing means is powered up when it is determined that the elapsed time interval has elapsed.

21. The call in-bound meter interface unit of claim 20, wherein said command and data processing means further includes time interval determining means for determining the prespecified time interval for said power control means.

22. The call in-bound meter interface unit of claim 21, wherein the time interval determining means determines the prespecified time interval for periodically powering said command and data processing means based on the time which has elapsed and the elapsed time interval for interconnection.

23. The call in-bound meter interface unit of claim 20, wherein said command and data processing means further includes callback determining means both for determining when an interconnection between said meter interface unit and said data collection means is unsuccessful and for determining the elapsed time interval for making another interconnection.

24. The call in-bound meter interface unit of claim 23, wherein said callback determining means determines when to make another interconnection based on the data being transmitted and how many interconnections between said meter interface unit and said data processing means have been attempted.

25. The call in-bound meter interface unit of claim 24, wherein the data processing means is provided with a plurality of different telephone numbers and wherein said command and data processing means selects one of the plurality of phone numbers for said meter interface unit interconnecting means to dial.

26. The call in-bound meter interface unit of claim 23, wherein said meter interface unit further includes telephone line status monitoring means for monitoring the telephone lines to determine if the telephone line is in use before said meter interface unit interconnects to said data processing means, where an interconnection is made when said line status monitoring means determines that the telephone lines are free and wherein said callback determining means determines the elapsed time interval for making another interconnection when said line status monitoring means determines that the telephone lines are busy.

27. The call in-bound meter interface unit of claim 26, wherein said command and data processing means further includes timeout means for breaking the interconnection between said meter interface unit and said data processing means when a predetermined amount of time has elapsed since the transmission of information from said meter interface unit and wherein said callback determining means determines the elapsed time interval for making another interconnection when the predetermined amount of time has elapsed.

28. The call in-bound meter interface unit of claim 27, wherein said command and data processing means further includes a meter interface connection that interconnects the meter to be read and said command and data processing means, wherein said meter interface connection is powered by said power supply in response to commands from said command and data processing means.

29. The call in-bound meter interface unit of claim 28, wherein said power supply is batteryless.

30. The call in-bound meter interface unit of claim 28, wherein said power supply includes a battery.

31. A method for the remote reading of utility meters and the collection of data, comprising the steps of:

providing a data processing means to collect, store and process data, the data processing means further including means for interconnecting the data processing means to conventional telephone lines;

interconnecting a meter interface unit to at least one remotely located meter to be read and to the telephone lines;

prespecifying one amount of time, one elapsed time interval, for making a scheduled reading of at least one utility meter and prespecifying another amount of time, another elapsed time interval, for making an unscheduled demand reading of at least one utility meter;

determining when the elapsed time interval for making a particular meter reading has elapsed;

monitoring the telephone lines for telephone line transmissions;

evaluating telephone line transmissions and determining when the telephone line transmissions indicate that the meter interface unit is to interconnect to the data processing means via the telephone lines for the unscheduled reading of at least one utility meter;

interconnecting the meter interface unit and the data processing means via the telephone lines, when said determining determines that the elapsed time interval specified for the particular meter reading has elapsed, for communication and data transfer between the data processing means and the meter interface unit;

processing commands from the data collection means and outputting data, in response to the commands received, to the data collection means after interconnecting the meter interface unit and the data processing means.

32. The method for the remote reading of utility meters and the collection of data of claim 31, further including the step of selectively powering the meter interface unit during specified periods of meter interface unit activity.

33. The method for the remote reading of utility meters and the collection of data of claim 32, further including the steps of:

periodically powering up a tone sensing means; and

monitoring the telephone lines with the tone sensing means for the presence of a prespecified tone.

34. The method for the remote reading of utility meters and the collection of data of claim 33, further including the steps of monitoring the telephone line for the presence of ring bursts indicative of an incoming phone call and determining if the number of ring bursts exceeds a prespecified value.

35. The method for the remote reading of utility meters and the collection of data of claim 34, further including the step of periodically performing said determining when the prespecified amount of time has elapsed.

36. The method for the remote reading of utility meters and the collection of data of claim 35, further including the step of determining a prespecified interval for said periodically performing.

37. The method for the remote reading of utility meters and the collection of data of claim 36, wherein said step of determining the prespecified interval is based on the time which has elapsed and the elapsed time interval specified for interconnection.

38. The method for the remote reading of utility meters and the collection of data of claim 35, further including the steps of:

determining when an interconnection between the data processing means and the meter interface unit is unsuccessful; and

determining the elapsed time interval for making another interconnection attempt.

39. The method for the remote reading of utility meters and the collection of data of claim 38, wherein said determining the elapsed time interval for making another interconnection attempt determines the elapsed time interval based on the data being transmitted and how many interconnections between the meter interface unit and the data processing means have been attempted.

40. The method for the remote reading of utility meters and the collection of data of claim 39, further including the step of selecting one of a plurality of telephone numbers assigned to the data processing unit and dialing that number to interconnect the data processing means and the meter interface unit.

41. The method for the remote reading of utility meters and the collection of data of claim 38, further including the steps of:

status monitoring the telephone lines to determine if the telephone line is in use before dialing the data processing means'"'"' assigned telephone number, where an interconnection is attempted when said status monitoring determines that the telephone lines are free; and

repeating said determining the elapsed time interval for making another interconnection when said line status monitoring indicates that the telephone lines are busy.

42. The method for the remote reading of utility meters and the collection of data of claim 38, further including the steps of:

breaking the interconnection between the meter interface unit and the data processing means when a predetermined amount of time has elapsed since the transmission of information from the meter interface unit; and

repeating said determining the elapsed time interval for making another interconnection when the predetermined amount of time has elapsed.

43. The method for the remote reading of utility meters and the collection of data of claim 38, further including the steps of interconnecting the meter to be read and the meter interface unit, and providing power to the meter after an interconnection between the meter interface unit and the data processing means has been established;

and interrogating the meter for register data.

44. The method for the remote reading of utility meters and the collection of data of claim 38, further including the step of providing a meter interface unit that is batteryless.

45. The method for the remote reading of utility meters and the collection of data of claim 38, further including the step of providing a meter interface unit powered by a battery.