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:
Aug. 12, 2025
Filed:
Oct. 05, 2023
Axis Ab, Lund, SE;
Gillis Oldfeldt, Lund, SE;
Frida Johnsson, Lund, SE;
AXIS AB, Lund, SE;
Abstract
A system determines a distance between networked electronic devices. A first sound signal comprising a first measuring wave having a first frequency carried on a first carrier wave having a first carrier frequency higher than the first frequency is emitted by a first device. A second device receives the first sound signal, and defines a second sound signal comprising a second measuring wave having the first frequency carried on a second carrier wave having a second carrier frequency different from the first carrier frequency. A phase of the second measuring wave is set such that it simulates a reflection of the first measuring wave on the second device. The second sound signal is emitted by the second device and received by the first device. The distance between the first and second devices is calculated based on a phase shift between the emitted first, and received second measuring waves.