Resources Contact Us Home
Broad field motion detector

Image Number 12 for United States Patent #7277012.

A motion sensing system device and method which utilize dispersed ultrasonic radiation is disclosed. The system preferably comprises a low profile sensor unit configured to couple to a ceiling position. The sensor unit comprises an ultrasonic transmitter and an ultrasonic receiver and a pair of acoustic reflectors positioned in a transmitting path of the ultrasonic transmitter and a receiving path of the ultrasonic receiver for generating and detecting the ultrasonic radiation in a broadcast field. The acoustic reflectors preferably comprise cones, conical cross-sections and/or combinations thereof which are integral with the ultrasonic transmitter and the ultrasonic receiver and/or are coupled to a housing structure for positioning the acoustic reflectors in the transmitting and/or receiving paths. The sensor unit also preferably comprises a circuit for driving the transmitter and for detecting motion by detecting changes in the receiver signal. In further embodiments, the system also includes an infrared sensor and is configured to generate a response based on the combination of changes in the receiver signal and a signal form the infrared sensor.

  Recently Added Patents
Method and system for constructing a customized web analytics application
Method and system for establishing security connection between switch equipments
Reliable event broadcaster with multiplexing and bandwidth control functions
System, method, and computer program product for determining whether an electronic mail message is compliant with an etiquette policy
Collaborative data redundancy for configuration tracking systems
Associating objects in databases by rate-based tagging
  Randomly Featured Patents
Lower guide valve seal
Method for automatically preferring a diacritical version of a linguistic element on a handheld electronic device based on linguistic source and associated apparatus
Print cartridge
Method of making a vehicle window with opaque layer
Seat slide device for automotive seat
Storage device
Method of associating target data in a multi-slope FMCW radar system
Pressure-sensitive resistance element
Image processing system and method employing hybrid filtering to provide improved reconstruction of continuous tone images from halftone screen-structured images
Surface mountable integrated circuit package with low-profile detachable module