Water leak detection and suppression

• US 20020033759A1
• Filed: 02/26/2001
• Published: 03/21/2002
• Est. Priority Date: 02/25/2000
• Status: Abandoned Application

• Current Assignee: The Linjan Corporation Incorporated
• Original Assignee: The Linjan Corporation Incorporated
• Inventors: Morello, Richard L.
• Application Number:
  US09/792,027
• Publication Number:
  US 20020033759A1
• Time in Patent Office: Days
• US Class Current: 340/605
• CPC Class Codes: G01M 3/18 for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
• CPC Class Codes: G08B 21/20 responsive to moisture

Abstract

A system and a method for the detection of a water leak. An alarm can be sounded and a valve closed to shut off a water supply when a wireless sensor is in the presence of water. Exemplary embodiments of the wireless sensor can be battery supplied and mounted to a wall or a floor. In fact, a magnetic latching valve can be used to minimize power consumption, and allow the entire system to be battery supplied as needed. Wireless sensors according to the present invention can be disposed in homes or commercial buildings, including, e.g., under hot water tanks, sinks, A/C drip pans, ice makers, washer machines, and/or toilets.

Claims

1. A water leak detector system, comprising:

a valve configured to open or close a pipe upon receipt of a valve signal;

a controller configured to receive notification indicative of a water leak and to transmit said valve signal to said valve; and

a wireless moisture detector configured to determine the presence of water indicative of said water leak and transmit said notification indicative of said water leak in response to said presence, wherein

said wireless moisture detector including a transmission means for wirelessly transmitting said notification indicative of said water leak and said controller including means for wirelessly receiving said notification indicative of said water leak.

2. The water leak detector system according to claim 1, wherein said wireless moisture detector includes an ID encoder that provides said wireless moisture detector with identification information that is recognizable by said controller.

3. The water leak detector system according to claim 1, wherein said wireless moisture detector includes a battery power supply.

4. The water leak detector system according to claim 3, wherein said wireless moisture detector includes a power supply check configured to determine a voltage level of said battery power supply and provide a notification signal when said voltage level drops below a certain level.

5. The water leak detector system according to claim 1, further comprising a repeater configured to receive, amplify, and retransmit wireless communications, including said notification indicative of said water leak, said wireless communications traveling between said controller and said wireless moisture detector.

6. The water leak detector system according to claim 1, wherein said controller includes a network connection configured to transmit water leak detector system status information and to receive water leak detector system commands.

7. The water leak detector system according to claim 1, wherein said valve comprises a magnetic latching valve.

8. The water leak detector system according to claim 1, wherein said transmission means comprises an RF antenna.

9. The water leak detector system according to claim 1, further comprising a battery power supply.

10. The water leak detector system according to claim 1, wherein said controller further comprises an integrated circuit timer configured to generate a valve close signal.

11. A method for detecting and suppressing a water leak, comprising:

transducing the presence of water in the neighborhood of a wireless sensor;

transmitting wirelessly a moisture detection signal from said wireless sensor indicative of said presence of water; and

closing a valve in response to receipt of said moisture detection signal.

12. The method according to claim 11, further comprising:

denoting said wireless sensor by identifying information; and

transmitting wirelessly said identifying information along with said moisture detection signal.

13. The method according to claim 12, further comprising:

receiving said identifying information; and

localizing said wireless sensor using said received identifying information.

14. The method according to claim 11, further comprising:

supplying said wireless sensor with power using a battery.

15. The method according to claim 14, further comprising:

monitoring a power level of said battery.

16. The method according to claim 15, further comprising:

transmitting wirelessly a low power level signal along with said moisture detection signal when said power level of said battery drops below a predetermined power level.

17. The method according to claim 15, further comprising:

signalling audibly from said wireless sensor when said power level of said battery drops below a predetermined power level.

18. The method according to claim 11, further comprising:

receiving wirelessly said moisture detection signal;

amplifying said moisture detection signal; and

repeating wirelessly said amplified moisture detection signal.

19. The method according to claim 11, further comprising transmitting status information and receiving water leak detector system commands by way of a communications network.

20. The method according to claim 11, wherein said closing a valve step comprises sending a pulse to a magnetic latching valve.