Patent ID: 7276030
Filing Date: 2007-10-02
Classification: B60R,G01V

Abstract:
1. A human body detection method for detecting a human body in a vehicle, comprising: detecting chest motion associated with breathing and obtaining a breathing motion signal representing said chest motion in the form of an electrical signal; detecting times at which specific points occur in a waveform of said breathing motion signal; and detecting the presence of a human body in said vehicle when time interval between said specific points is within a predetermined range, wherein said specific points in the waveform of said breathing motion signal are peaks on a positive or negative side of the waveform of said breathing motion signal, and wherein the times (T(n)) at which said peaks occur are detected to obtain a peak-to-peak time interval (ΔT(n)), a difference (Δt(n)) between peak-to-peak time intervals is obtained from said peak-to-peak time interval (ΔT(n)), and the presence of a human body is detected in said vehicle when the difference (Δt(n)) between said peak-to-peak time intervals is smaller than a predetermined value (Tth).