Resources Contact Us Home
Broad field motion detector

Image Number 11 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
System and method for advertising messages on distributed document processing devices
All-in-one information handling system
Method and system for advertisement using internet browser to insert advertisements
Fluorescent molecule and method for detecting target nucleic acid
Bad column management with bit information in non-volatile memory systems
Changing sound alerts during a messaging session
Drive apparatus
  Randomly Featured Patents
Cellulose sulfate esters
Layout-based page capture
Method for feeding a sheet substack from a sheet stack and apparatus for implementing said method
Outside bay adapter for a concrete forming system
Device for injecting a hydrocarbon charge
Acylation of aromatic ethers/phenols
Extended range variable length coding/decoding of differential motion vector information
Saving apparatus for program sheet in automatic control system of flat knitting machine
Combined golf ball marker and holder
Withanamide and withanolide compositions and method of use thereof