Patent ID: 7113874
Filing Date: 2006-09-26
Classification: B60R

Abstract:
1. A method of sensing a condition of a magnetic circuit, comprising: a. generating at least one signal responsive to at least one magnetic field in at least one magnetic circuit, wherein said at least one magnetic field is generated within a vehicle, and said at least one magnetic circuit comprises at least a portion of said vehicle; b. filtering said at least one signal with at least one first filter so as to generate a corresponding at least one first filtered signal; c. filtering said at least one signal with at least one second filter so as to generate a corresponding at least one second filtered signal, wherein said at least one first filter and said at least one second filter are adapted so that a magnitude of a component of said at least one first filtered signal at at least one first frequency is greater than a magnitude of a component of said at least one second filtered signal at said at least one first frequency, and a magnitude of a component of said at least one second filtered signal at at least one second frequency is greater than a magnitude of a component of said at least one first filtered signal at said at least one second frequency, wherein said is at least one second frequency is greater than said at least one first frequency; and d. sensing a condition of said at least one magnetic circuit responsive to said at least one first filtered signal and responsive to said at least one second filtered signal.