Patent ID: 7808395
Filing Date: 2010-10-05
Classification: B60N,B60R

Abstract:
1. A method of detecting occupancy of a vehicle, the method comprising: (a) filtering an initial signal in a first and a second band pass filter to result in a respective first and second frequency band; (b) measuring in a first measuring means a first measurement signal in the first frequency band representing a first signal indicative of a human occupancy; (c) measuring in a second measuring means a reference signal as a second measurement signal in the second frequency band representing a second signal indicative of background noise; (d) comparing a first signal strength of the first measurement signal to a second signal strength of the second measurement signal in a comparing means; and (e) detecting occupancy so that when the first signal strength is different from the second signal strength the occupancy has been detected; and wherein the first and measuring means are directly connected to the respective first and second band pass filter.