Wireless sensing for in-vehicle child presence detection

US12352844B2 · kind B2 · utility

Assignee

• ORIGIN RESEARCH WIRELESS, INC. · US

Inventors

• Sakila S. Jayaweera · College Park, US
• Beibei Wang · Clarksville, US
• Guozhen Zhu · Greenbelt, US
• Weihang Gao · Rockville, US
• Chenshu Wu · Hong Kong, CN
• K. J. Ray Liu · Potomac, US
• Oscar Chi-Lim Au · San Jose, US

Key dates

• Filing date: Dec 28, 2024
• Grant date: Jul 8, 2025
• Expiry date: Dec 28, 2044

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L5/0057
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Wireless sensing for in-vehicle child presence detection is described. In one example, a described method comprises: obtaining a time series of channel information (TSCI) of a wireless channel in a vehicle; computing a motion statistics (MS) based on channel information (CI) of the TSCI in a time period; detecting a motion of a user in the time period by comparing the motion statistics with a first threshold, wherein the motion of the user is detected when the motion statistics exceed the first threshold; constructing a 2-dimensional (2D) transform matrix based on 1-dimensional (1D) transforms of CI of TSCI in sliding time windows in the time period; detecting a number of horizontal streaks of the 2D transform matrix; detecting a breathing motion of the user in the time period based on the number of detected horizontal streaks of the 2D transform matrix and an associated criterion.