Patent ID: 6590834
Filing Date: 2003-07-08
Classification: G01C,G01S

Abstract:
A local positioning system comprising:a control module housing; a control module radio frequency transceiver disposed within said control module housing; a control module processing device disposed within said control module housing, said control module processing device in electrical communication with said control module radio frequency transceiver; a plurality of timers in electrical communication with said control module processing device; a plurality of acoustic receivers, each of said plurality of acoustic receivers located equidistant from said control module housing and disposed at a distal end of an elongated member extending radially outward from said control module housing, each of said plurality of acoustic receivers configured to have an onmidirectional response, each of said plurality of acoustic receivers in electrical communication with a selected one of said plurality of timers; a control module power supply in electrical communication with said control module radio frequency transceiver, said control module processing device, said plurality of timers, and said plurality of acoustic receivers; a remote unit housing; a remote unit acoustic transmitter disposed in said remote unit housing; a remote unit radio frequency transceiver disposed in said remote unit housing; a remote unit processing device disposed in said remote unit housing, said remote unit processing device in electrical communication with said remote unit radio frequency transceiver and said remote unit acoustic transmitter; at least one communication port in electrical communication with said processing device; and a remote unit power supply in electrical communication with said remote unit acoustic transmitter, said remote unit radio frequency transceiver, and said remote unit processing device.