Wireless integrated occupancy sensor

• US 7,123,139 B2
• Filed: 05/25/2005
• Issued: 10/17/2006
• Est. Priority Date: 05/25/2004
• Status: Expired due to Fees

• Current Assignee: TAC AB (Schneider Electric SE)
• Original Assignee: TAC AB (Schneider Electric SE)
• Inventors: Sweeney, Kevin
• Primary Examiner(s): Lee, Benjamin C.
• Application Number:
  US11/136,879
• Publication Number:
  US 20050264414A1
• Time in Patent Office: 510 Days
• Field of Search: None
• US Class Current: 340/521
• CPC Class Codes: F24F 11/30 for purposes related to the operation of the system, e.g. for safety or monitoring
• CPC Class Codes: F24F 11/46 Improving electric energy efficiency or saving
• CPC Class Codes: F24F 2120/10 Occupancy
• CPC Class Codes: G08B 13/19 using infrared-radiation detection systems G08B13/194 takes precedence
• CPC Class Codes: G08B 19/00 Alarms responsive to two or more different undesired or abnormal conditions, e.g. burglary and fire, abnormal temperature and abnormal rate of flow
• CPC Class Codes: G08B 29/183 Single detectors using dual technologies G08B13/1672, G08B13/2448, G08B13/2494 take precedence

Abstract

An occupancy sensor is provided for determining whether a room is occupied. The occupancy sensor integrates a battery-powered PIR motion detector and a battery-powered Hall Effect switch, each of which communicates wirelessly with a controller, in a single housing.

Claims

1. An occupancy sensor for detecting occupancy of a room with an access door comprising:

a battery-powered passive infrared motion detector for producing a motion detected status message;

a battery-powered Hall Effect switch for producing a door open or door closed status message; and

a battery-powered transceiver for wirelessly transmitting motion detected, door open and door closed status messages;

wherein the motion detector, the Hall Effect switch and the transceiver are all contained in a single housing.

2. The occupancy sensor of claim 1 further comprising one or more batteries of the same type contained in the single housing to act as a power source for the motion detector, the Hall Effect switch and the transceiver.

3. The occupancy sensor of claim 2 wherein the occupancy sensor wirelessly transmits a low battery status message when the one or more batteries have less than 20 percent battery capacity remaining.

4. The occupancy sensor of claim 3 further comprising one or more batteries of the same type contained in the single housing to act as a power source for the motion detector and the Hall Effect switch.

5. The occupancy sensor of claim 1 further comprising a cover to the single housing and a tamper switch that causes a tamper detected status message to be sent when the cover is removed from the single housing.

6. An occupancy sensor for detecting occupancy of a room with an access door comprising:

a battery-powered passive infrared motion detector for detecting motion within the room;

a battery-powered Hall Effect switch for detecting whether the door is open or closed;

wherein the motion detector and the Hall Effect switch are each in wireless communication with a controller and are both contained in a single housing.