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:
Jan. 07, 2014
Filed:
Mar. 17, 2011
Luca DE Rosa, Colombier, CH;
Luca De Rosa, Colombier, CH;
The Swatch Group Research and Development Ltd, Marin, CH;
Abstract
The invention concerns a method and system of locating objects by means of UWB signals, the system including a search device (D), incorporated in a portable apparatus () and provided with a pair of antennae (A, A), and at least one target device (D) attached to an object sought (). The target device (D) includes, in addition to the transceiver (), a very low power consumption wake up receiver () which, when the target device is in a standby state, can receive a UWB wake up signal to switch on said device. This target device is arranged for measuring a time difference (tdiff) between the respective receptions of two locating signals respectively emitted by the two antennae (A, A) of the search device and for transmitting said time difference in a return signal that further contains, in a preferred variant, a signal processing time (trproc). Thus, it is not necessary for the two devices to be synchronized. Preferably, the search device (D) is incorporated in a wristwatch () the two hands () of which are used for indicating the direction or possible directions of the object sought ().