Power source for sensors

• US 7,112,892 B2
• Filed: 07/21/2004
• Issued: 09/26/2006
• Est. Priority Date: 07/21/2004
• Status: Expired due to Fees

• Current Assignee: Avago Technologies General IP PTE Limited (Broadcom, Inc.)
• Original Assignee: Avago Technologies General IP PTE Limited (Broadcom, Inc.)
• Inventors: Mahowald, Peter H.
• Primary Examiner(s): Gonzalez, Julio
• Application Number:
  US10/896,253
• Publication Number:
  US 20060017291A1
• Time in Patent Office: 797 Days
• Field of Search: 290/43, 290/54, 606/08
• US Class Current: 290/54
• CPC Class Codes: F05B 2220/602 with energy recovery turbines
• CPC Class Codes: F23N 2005/181 using detectors sensitive to rate of flow of air
• CPC Class Codes: F23N 2005/185 using detectors sensitive to rate of flow of fuel
• CPC Class Codes: F23N 5/187 using electrical or electromechanical means

Abstract

A sensor is placed in wireless communication with a monitoring system. Power for the sensor is generated by scavenging power from fluid flow within a pipe.

Claims

1. A system comprising:

a sensor in wireless communication with a monitoring system; and

,

a generator that generates power for the sensor, the generator partially placed through a hole within a pipe so that part of the generator is on one side of the hole and within the pipe and part of the generator is on another side of the hole and outside the pipe, the generator including;

a paddle wheel which is rotated by fluid flow within the pipe,

a magnet that rotates with the paddle wheel, and

a coil located in close proximity to the magnet so that rotation of the magnet generates an alternating current signal.

2. A system as in claim 1 wherein the magnet is attached to a shaft within the generator.

3. A system as in claim 1 wherein the magnet is located on a leg of the paddle wheel.

4. A system as in claim 1 wherein the magnet is implemented as a magnetized leg of the paddle wheel.

5. A system as in claim 1 wherein the sensor includes an imager that images a flame of an appliance.

6. A system as in claim 1 wherein the sensor includes a moisture detector.

7. A system as in claim 1 wherein the sensor includes a thermometer.

8. A system as in claim 1 wherein the sensor measures fluid flow within pipe.

9. A system as in claim 1 wherein the fluid is one of the following:

gas;

liquid.

10. A method for performing monitoring comprising:

placing a sensor in wireless communication with a monitoring system; and

,

generating power for the sensor by scavenging power from fluid flow within a pipe, including;

placing a generator partially through a hole within a pipe so that part of the generator is on one side of the hole and outside the pipe and part of the generator is on another side of the hole and within the pipe so that a paddle wheel of the generator is rotated by fluid flow within the pipe,

rotating a magnet with the paddle wheel, and

producing an alternating current by a coil located in close proximity to the magnet.

11. A system that performs monitoring, comprising:

sensor means for performing wireless communication with a monitoring system; and

,

generator means for generating power for the sensor by scavenging power from fluid flow within a pipe, wherein the generator means comprises;

a generator that generates power for the sensor, the generator partially placed through a hole within a pipe so that part of the generator is on one side of the hole and outside the pipe and part of the generator is on another side of the hole and within the pipe so that a paddle wheel of the generator is rotated by fluid flow within the pipe,

a magnet rotated with the paddle wheel, and

a coil located in close proximity to the magnet that produces an alternating current signal when the magnet is rotated.

12. A system as in claim 11 wherein the magnet is attached to a shaft within the generator.

13. A system as in claim 11 wherein the magnet is located on a leg of the paddle wheel.

14. A system as in claim 11 wherein the magnet is implemented as a magnetized leg of the paddle wheel.

15. A system as in claim 11 wherein the sensor means is also for one of the following:

imaging a flame of an appliance;

detecting moisture;

measuring temperature;

measuring fluid flow within the pipe.