System and method for accurate reading of rotating disk

• US 6,784,807 B2
• Filed: 09/19/2001
• Issued: 08/31/2004
• Est. Priority Date: 02/09/2001
• Status: Expired due to Term

• Current Assignee: Landis+Gyr Inc. (Landis+Gyr Group AG)
• Original Assignee: Statsignal Systems Incorporated (Statsignal)
• Inventors: Davis, James, Huff, Richard M., Petite, Thomas D.
• Primary Examiner(s): Wong, Albert K.
• Application Number:
  US09/956,377
• Publication Number:
  US 20020109608A1
• Time in Patent Office: 1,077 Days
• Field of Search: 340/870.02, 250/229, 250/231.1, 250/231.13, 250/230, 250/233, 324/142, 348/167
• US Class Current: 340/870.02
• CPC Class Codes: G01D 4/008 Modifications to installed utility meters to enable remote reading
• CPC Class Codes: G08C 17/02 using a radio link
• 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

A novel system and method for achieving accurate readings of the rotational speed, number of revolutions and direction of rotation of a utility system. More specifically, a system and method for retrofitting existing utility meters with a lightweight tape, having contrasting sections of reflective and non-reflective material applied thereto, which is read by optical sensors as the lightweight tape passes by with the revolutions of the disk of the utility meter. Additionally, the system and method detects unauthorized use of the utility or tampering with the utility meter and its functions.

Claims

1. A system for remotely reading and monitoring utility usage, comprising:

a utility meter having a disk configured to rotate at a speed that is related to utility usage;

a piece of lightweight, polyester-film tape applied to the disk, having at least one highly reflective section and at least one substantially non-reflective section so as to produce contrasting sections of reflective material and non-reflective material on the lightweight, polyester-film tape;

an optical sensor;

a circuit card capable of interpreting the readings of the optical sensor; and

a device for transmitting data to a remote location.

2. The system of claim 1, wherein the lightweight, polyester-film tape and at least one optical sensor are retrofitted to an existing utility meter.

3. The system of claim 1, wherein the lightweight, polyester-film tape, at least one optical sensor and a circuit card are retrofitted to an existing utility meter.

4. The system of claim 1, wherein the lightweight, polyester-film tape is applied to a surface of the rotating disk and at least one optical sensor is aligned with the lightweight, polyester-film tape as it is carried through revolutions on the rotating disk so as to read the reflective and non-reflective sections of the lightweight, polyester-film tape as the rotating disk revolves with utility usage.

5. The system of claim 4, wherein the optical sensor reads the reflective and non-reflective sections of the lightweight, polyester-film tape and reports “

sensing”

or “

non-sensing”

states data to the circuit card;

the sensing state occurs when the optical sensor is reading a reflective or non-reflective section of the lightweight, polyester-film tape; and

the non-sensing state occurs when the optical sensor is reading the rotating disk and not the lightweight, polyester-film tape.

6. The system of claim 1, wherein the lightweight, polyester-film tape has more than one reflective section and more than one non-reflective section.

7. The system of claim 6, wherein the reflective sections of the lightweight, polyester-film tape have a predefined width and spacing and the non-reflective sections of the lightweight, polyester-film tape have a predefined width and spacing.

8. The system of claim 7, wherein the reflective sections and the non-reflective sections of the lightweight, polyester-film tape have equivalent widths and spacing.

9. The system of claim 7, wherein the widths and spacing of the non-reflective sections of the lightweight, polyester-film tape are non-equivalent so that the optical sensor may detect the rotational direction of the rotating disk.

10. The system of claim 1, further comprising a second optical sensor wherein a first optical sensor and the second optical sensor are both aligned with the lightweight, polyester-film tape so as to read the reflective and non-reflective sections of the lightweight, polyester-film tape and determine rotational speed and direction of rotation of the rotating disk.

11. The system of claim 10, wherein the first and second optical sensors read the reflective and non-reflective sections of the lightweight, polyester-film tape and report “

sensing”

or “

non-sensing”

states data to the circuit card;

the sensing state occurs when at least one of the optical sensors is reading a reflective or non-reflective section of the lightweight, polyester-film tape;

the non-sensing state occurs when both the first and second optical sensors are reading the rotating device and not the lightweight, polyester-film tape.

12. A system for remotely reading and monitoring utility usage, comprising:

a utility meter having a disk configured to rotate at a speed that is related to utility usage;

a piece of tape applied to the disk, the tape having at least one highly reflective section and at least one substantially non-reflective section so as to produce contrasting sections of reflective material and non-reflective material on the tape, the tape having a weight small enough so as not to upset the balance of the disk;

an optical sensor;

a circuit card capable of interpreting the readings of the optical sensor; and

a device for transmitting data to a remote location.

13. The system of claim 12, wherein the tape and at least one optical sensor are retrofitted to an existing utility meter.

14. The system of claim 12, wherein the tape is a lightweight, polyester-film tape.

15. The system of claim 12, wherein the tape is applied to a surface of the rotating disk and at least one optical sensor is aligned with the tape as it is carried through revolutions on the rotating disk so as to read the reflective and non-reflective sections of the tape as the rotating disk revolves with utility usage.

16. The system of claim 15, wherein the optical sensor reads the reflective and non-reflective sections of the tape and reports “

sensing”

or “

non-sensing”

states data to the circuit card;

the sensing state occurs when the optical sensor is reading a reflective or non-reflective section of the tape; and

the non-sensing state occurs when the optical sensor is reading the rotating disk and not the tape.

17. The system of claim 12, wherein the tape has more than one reflective section and more than one non-reflective section.

18. The system of claim 17, wherein the reflective sections of the tape have a predefined width and spacing and the non-reflective sections of the tape have a predefined width and spacing.

19. The system of claim 17, wherein the reflective sections of the tape have equivalent widths and spacing and the non-reflective sections of the tape have equivalent widths and spacing.

20. The system of claim 17, wherein the widths and spacing of the non-reflective sections of the tape are non-equivalent so that the optical sensor may detect the rotational direction of the rotating disk.

21. The system of claim 12, further comprising a second optical sensor wherein the first optical sensor and the second optical sensor are both aligned to read the reflective and non-reflective sections of the tape and determine rotational speed and direction of rotation of the rotating disk.

22. The system of claim 21, wherein the first and second optical sensors read the reflective and non-reflective sections of the tape and report “

sensing”

or “

non-sensing”

states data to the circuit card;

the sensing state occurs when at least one of the optical sensors is reading a reflective or non-reflective section of the tape;

the non-sensing state occurs when both the first and second optical sensors are reading the rotating device and not the tape.

23. A system for remotely reading and monitoring utility usage, comprising:

a utility meter having a disk configured to rotate at a speed that is related to utility usage;

a piece of tape applied to the disk, the tape having at least one highly reflective section and at least one substantially non-reflective section so as to produce contrasting sections of reflective material and non-reflective material on the tape;

an optical sensor, wherein the optical sensor is configured to sense the reflective and non-reflective sections of the tape and further configured to report “

sensing”

or “

non-sensing”

states data, the sensing state occurs when the optical sensor is reading a reflective or non-reflective section of the tape and the non-sensing state occurs when the optical sensor is reading the rotating disk and not the tape;

a circuit card capable of interpreting the readings of the optical sensor; and

a device for transmitting data to a remote location.

24. The system of claim 23, wherein the tape and at least one optical sensor are retrofitted to an existing utility meter.

25. The system of claim 23, wherein the tape is a lightweight, polyester-film tape.

26. The system of claim 23, wherein the tape is applied to a surface of the rotating disk and at least one optical sensor is aligned with the tape as it is carried through revolutions on the rotating disk so as to read the reflective and non-reflective sections of the tape as the rotating disk revolves with utility usage.

27. The system of claim 23, wherein the tape has more than one reflective section and more than one non-reflective section.

28. The system of claim 27, wherein the reflective sections of the tape have a predefined width and spacing and the non-reflective sections of the tape have a predefined width and spacing.

29. The system of claim 28, wherein the reflective sections of the tape have equivalent widths and spacing and the non-reflective sections of the tape have equivalent widths and spacing.

30. The system of claim 28, wherein the widths and spacing of the non-reflective sections of the tape are non-equivalent so that the optical sensor may detect the rotational direction of the rotating disk.

31. The system of claim 23, further comprising a second optical sensor wherein the first optical sensor and the second optical sensor are both aligned to read the reflective and non-reflective sections of the tape and determine rotational speed and direction of rotation of the rotating disk.