The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 08, 2007
Filed:
Feb. 03, 2000
Sang Gyu Ju, 441-2 Ahmsa-dong, Kangdong-ku, Seoul, KR;
Sang Gyu Ju, 441-2 Ahmsa-dong, Kangdong-ku, Seoul, KR;
Other;
Abstract
A passive sound telemetry system and method is provided, in which phase differences are calculated for every pulse from acoustic signals received via three or six acoustic receivers, to measure a distance and angle with respect to a sound source. The system is applied to an operating toy giving chase to a user while following the user command. The telemetry system includes first to fourth acoustic receivers () contained in the housing for receiving first to fourth acoustic signals from a user, first to fourth zero crossing detectors for generating first to fourth pulse signals based on the first to fourth acoustic signals, earliest reception signal detector for detecting a pulse signal having the earliest phase among the first to fourth pulse signals, first to fourth arrival time difference calculator () for calculating arrival time differences between the pulse signal of the earliest phase and the first to fourth pulse signals, respectively, thereby obtaining an angle and a distance between the center of acoustic receivers and the user, based on a time difference between the second and third minimum arrival time difference values.