Meter data gathering and transmission system

• US 4,652,877 A
• Filed: 07/01/1983
• Issued: 03/24/1987
• Est. Priority Date: 07/01/1983
• Status: Expired due to Term

• Current Assignee: M&FC Holding, LLC (Xylem, Inc.)
• Original Assignee: Rockwell International Corporation
• Inventors: Gray, Bruce E.
• Primary Examiner(s): NOT, DEFINED
• Assistant Examiner(s): NOT, DEFINED
• Application Number:
  US06/510,753
• Time in Patent Office: 1,362 Days
• Field of Search: 340/870.02, 340/870.03, 340/870.09, 340/870.11, 340/870.13, 340/825.2, 340/825.21, 371/69, 364/483, 375/7
• US Class Current: 340/870.02
• CPC Class Codes: G01D 4/00 Tariff metering apparatus in taximeters G07B13/00; apparatus actuated by coins, cards or the like with meter-controlled dispensing of liquid, gas, or electricity G07F15/00
• CPC Class Codes: G01F 15/063 using electrical means
• CPC Class Codes: G06M 1/27 for representing the result of count in the form of electric signals, e.g. by sensing markings on the counter drum

Abstract

A utility data gathering system is disclosed as comprising a register including a series of index members coupled to a meter mechanism. Each index member includes a plurality of contacts and a switch arm moveable with its index member. The meter mechanism is responsive to utility consumption for moving the index members to positions indicative of the utility consumed, whereby each switch arm completes in normal operation a circuit with just one of its plurality of contacts dependent upon the position of its index member. A digital computer is programmed for performing first and second scans of each contact of each index member to obtain corresponding first and second sets of data indicative of a completed circuit through the switch arm and contacts of each index member. The completed circuit data obtained from each of the first and second scans are compared and if the circuit data of the first and second scans are different, an alarm manifestation is generated.

Claims

1. A utility data gathering system comprising:

(a) register means including a series of index members, each index member including a plurality of contacts and a switch arm moveable with its index member, and a meter mechanism responsive to utility consumption for disposing said index members to positions indicative of the utility consumed, whereby each switch arm completes in normal operation a circuit with just one of its plurality of contacts dependent upon the position of its index member; and

(b) utility data gathering means comprising a digital computer programmed for performing first and second scans of each contact of each index nember to obtain corresponding first and second sets of completed circuit data signals, each data signal indicative of whether a circuit is completed through one of said switch arms and one of its contacts, for comparing corresponding ones of said first and second sets of completed circuit data signals obtained from each of said first and second scans, and if said completed circuit data signals of said first and second scans are different, for providing a manifestation indicating that said switch arm has moved due to further utility consumption during the gathering of data.

2. The utility data gathering system as claimed in claim 1, wherein said digital computer is programmed for formatting and transmitting the completed circuit data from each of said index members into a return data signal indicative of the utility consumed, if said first and second sets of data agree.

3. A data gathering system for gathering data indicative of consumption of a utility and for transmitting a signal indicative of the utility consumed, said data gathering system comprising:

(a) metering means for accumulating data indicative of utility consumed; and

(b) utility data gathering means implemented by a digital computer comprising an input terminal coupled to receive an interrogation signal and an output terminal at which is provided a return data signal, said interrogation signal comprised of a train of signal bursts, each burst having an initiate edge, memory means for storing a program executed for accessing said metering means to obtain a digital manifestation indicative of the utility consumed, means responsive to selected ones of said initiate edges for executing said program, and data transmission means responsive to each initiate edge of the interrogation signal for applying to said output terminal a unit portion of said digital manifestation, the recurring frequency of said initiate edges of the interrogation signal being compatible with said given rate to permit said executing means to execute said program.

4. The data gathering system as claimed in claim 3, wherein there is included a single inductive coupling means for transmitting the interrogation signal in a first direction therethrough to said input terminal and for transmitting said return data signal in a second direction therethrough, consecutive bursts of said interrogation signal defining a transmission interval for the transmission of said unit portion of said digital manifestation in said second direction, said transmission interval being of a sufficient length to permit said inductive coupling means to permit efficient transmission of said return data signal.

5. The data gathering system as claimed in claim 3, wherein there is included power conversion means for receiving said interrogation signal and for utilizing at least one of said bursts to solely energize said data gathering system.

6. The data gathering system as claimed in claim 5, wherein said power conversion means comprises a storage means and each burst of said interrogation signals comprises a a plurality of pulses of a relatively high frequency compared with an envelope of said burst, said storage means comprising a capacitor and a resistor coupled together to permit charging of said capacitor by said interrogation signal, said capacitor and said resistor having impedences selected to provide a time constant to permit the rapid charging of said capacitor by said signal burst.

7. A method of accessing and gathering data from a meter register, said meter register comprising a series of index members, each index member including a plurality of contacts and a switch arm moveable with its index member, and a meter mechanism responsive to utility consumption for disposing said index members to positions indicative of the utility consumed, whereby each switch arm completes in normal operation a circuit with just one of its plurality of contacts dependent upon the position of its index member, said method comprising the steps of:

(a) performing first and second data scans of said meter register, each of said first and second scans includes applying sequentially an electrical signal to said switch arm of each of said index members and scanning each of said plurality of contacts to determine the presence of said signal and, therefore, a completed circuit through said switch arm and said one contact to obtain respectively first and second sets of completed circuit data signals, each completed circuit data signal indicative of a closed circuit through one of said switch arms and one of said contacts of said one switch arm; and

(b) comparing corresponding ones of the completed circuit data signals obtained from each of said first and second scans to provide a manifestation indicative that said switch arm has moved due to further utility consumption during the data gathering.

8. The method of accessing and gathering utility data as claimed in claim 7, further comprising the step of providing an manifestation if said completed circuit data signals of said first and second scans are different.

9. The method of accessing and gathering utility data as claimed in claim 8, further comprising the step of determining whether the completed circuit signals of the first and second scans agree and, if so, for formatting and transmitting the completed circuit signals from each of said index members into a return data signal indicative of the utility consumed.

10. A utility data gathering system comprising:

(a) register means comprising an index member including a plurality of contacts and a movable switch arm, and a meter mechanism responsive to utility consumption for disposing said switch arm to a position indicative of the utility consumed, whereby said switch arm completes in normal operation a circuit with just one of its plurality of contacts; and

(b) utility data gathering means comprising means for scanning each contact of said index member to obtain a corresponding plurality of completed circuit data signals indicative of whether a circuit is completed through said switch arm and one of its contacts, and means for examining said plurality of completed circuit data signals to determine the presence of at least two of said completed circuit data signals indicative of two closed circuits for providing a first warning manifestation indicative thereof.

11. The utility data gathering system as claimed in claim 10, wherein said utility data gathering means comprises means for examining said plurality of completed circuit data signals to determine the absence of any of said completed circuit data signals indicative of no circuit closure for providing a second warning manifestation indicative thereof.

12. The utility data gathering system as claimed in claim 10, wherein said utility data gathering means comprises scanning means for performing first and second scans of each of said plurality of contacts to obtain corresponding first and second sets of said completed circuit data signals, and means for comparing corresponding ones of said first and second sets of completed circuit data signals and for providing a third warning manifestation if said completed circuit data signals of said first and second sets are different indicating that said switch arm has moved due to further utility consumption.

13. The utility data gathering system as claimed in claim 12, wherein said utility data gathering means comprising a memory, means for storing in the course of each of said first and second scans a code manifestation in said memory, means responsive to the first occurring circuit closure data signal for accessing said memory and storing in place of said code manifestation a single completed circuit manifestation indicative that a circuit had been completed through one of said plurality of contacts.

14. The utility data gathering system as claimed in claim 13, wherein said utility data gathering means comprises means for detecting a second occurring completed circuit data signal with a single scan for accessing said memory to detect said single completed circuit manifestation to provide a twice completed circuit manifestation indicative of two closed circuits through two of said plurality of contacts.

15. The utility data gathering system as claimed in claim 13, wherein said utility data gathering means comprises means responsive to the completion of a scan of said plurality of contacts for accessing said memory and, if said code manifestation is present, to provide said second warning manifestation indicative of no closed circuits.

16. A utility data gathering system comprising:

(a) register means including a series of index members, each index member including a plurality of contacts and a switch arm moveable with its index member, and a meter mechanism responsive to utility consumption for disposing said index members to positions indicative of the utility consumed, whereby each switch arm completed in normal operation a circuit with just one of its plurality of contacts dependent upon the position of its index member; and

(b) utility data gathering means comprising a digital computer programmed for performing first and second scans of each contact of each index member to obtain corresponding first and second sets of completed circuit data signals, each data signal indicative of whether a circuit is completed through one of said switch arms and one of its contacts, for comparing said corresponding ones of said first and second sets of completed circuit data signals obtained from each of said first and second scans, and if said completed circuit data signals of said first and second sets are different, for providing a first manifestation indicating that said switch arm has moved due to further utility consumption;

(c) said digital computer comprises a memory having a storage location corresponding to each of said index members, and said digital computer is programmed to store in the course of each of said first and second scans an error code in each of said plurality of storage locations, responsive to one of said completed circuit data signals indicative of the closure of one contact of one of said index members to access said storage location corresponding to said one index member to determine the presence of said error code in said addressed storage location and, if present, to provide a second manifestation indicative that no contacts of said one index member had been previously closed during the current scan.

17. The utility data gathering system as claimed in claim 16, wherein said digital computer is programmed to respond to said one contact closure data signal for erasing said error code as stored in said addressed storage location and for storing therein a third manifestation indicative of previous contact closure of a corresponding one index member.

18. The utility data gathering system as claimed in claim 17, wherein said digital computer is programmed to respond to a second received contact closure data signal for accessing said storage location corresponding to said one index member, and responsive to the storage therein of said third manifestation for providing a fault signal indicative that two or more contacts of said one index member are closed.

19. A method of accessing and gathering data from a meter register, said meter register comprising a series of index members, each index member including a plurality of contacts and a switch arm moveable with its index member, and a meter mechanism responsive to utility consumption for disposing said index members to positions indicative of the utility consumed, whereby each switch arm completes in normal operation a circuit with just one of its plurality of contacts dependent upon the position of its index member, said method comprising the steps of:

(a) performing first and second data scans of said meter register, each of said first and second scans includes applying sequentially an electrical signal to said switch arm of each of said index members and scanning each of said plurality of contacts to determine the presence of said signal and, therefore, a completed circuit through said switch arm and said one contact to obtain respectively first and second sets of completed circuit data signals, each completed circuit data signal indicative of a closed circuit through one of said switch arms and one of said plurality of contacts of said one switch arm;

(b) comparing corresponding ones of the completed circuit data signals obtained from each of said first and second scans and, if they do not agree, providing a first manifestation indicative that said switch arm has moved due to further utility consumption;

(c) storing an error code in the course of each of said first and second scans in a storage location for each of said index members of said register; and

(d) detecting the presence of said closed circuit data signal corresponding to one of said index members to determine the presence of said error code in said corresponding storage location and, if present, for providing a second manifestation indicative of a first contact closure for said one index member during the current scan.

20. The method of accessing and gathering utility data as claimed in claim 19 wherein upon detection of the first occurring contact closure data signal, erasing the error code stored in said corresponding storage location.

21. The method of accessing and gathering utility data as claimed in claim 20, wherein the storage location is again accessed upon the detection of a second occurring contact closure data signal for one of said index members and, in the absence of said error code, generating a fault signal indicative that two or more contacts of said one index member are closed.

22. A data gathering system for gathering data indicative of consumption of an utility and for transmitting a return data signal indicative of the utility consumed, said data gathering system comprising:

(a) metering means for accumulating digital data indicative of utility consumed;

(b) utility data gathering means implemented by a digital computer comprising an input terminal coupled to receive an interrogation signal and an output terminal at which is provided said return data signal, said interrogation signal comprised of a train of signal bursts, each signal burst comprised of a plurality of pulses of a relatively high frequency compared to that of said signal bursts and an envelope, memory means for storing a program executed for accessing said metering means to obtain said digital data indicative of consumed utility, means for executing said program at a given rate, and data transmission means responsive to each of said envelopes of said interrogation signal for applying to said output terminal a unit portion of said digital data to provide said return data signal, the frequency of said signal bursts of said interrogation signal being compatible with said given rate to permit said executing means to execute said program;

(c) a single inductive coupling means for transmitting said interrogation signal in a first direction therethrough to said input terminal and for transmitting said return data signal in a second, opposite direction therethrough, consecutive signal bursts of said interrogation signal defining a transmission interval for the transmission of said unit portion of said digital data as a part of said return data signal;

(d) power conversion means for receiving said interrogation signal and for utilizing at least one of said signal bursts to solely energize said data gathering system, said power conversion means comprises a storage means comprising a capacitor and a resistor coupled together to permit charging of said capacitor by said signal bursts, said capacitor and said resistor having impedences selected to provide a time constant to permit the rapid charging of said capacitor by said signal burst; and

(e) detection means for detecting said envelope of each signal burst and for providing a signal wave form indicative of said envelope and its initiate edge to said input terminal.

23. The data gathering system as claimed in claim 22, wherein said detection means comprises a filter circuit having a time constant that is relatively long compared to said time constant of said power conversion means for removing from its output said high frequency signal bursts.