Patent ID: 7639135
Filing Date: 2009-12-29
Classification: E01F,G06K

Abstract:
1. A method of detecting substantially related objects, comprising: a. providing a first wireless sensing device having a first acceleration sensor; b. providing a second wireless sensing device having a second acceleration sensor; c. obtaining a first signature from the group consisting of a first acceleration signature and a first acceleration spectral signature from said first acceleration sensor and obtaining a second signature from the group consisting of a second acceleration signature and a second acceleration spectral signature from said second acceleration sensor; d. providing an input to at least said second wireless sensing device during a time frame, comparing said first signature with said second signature to identify whether said first wireless sensing device also received said input and to determine whether said first signature is substantially related to said second signature; and e. identifying said first wireless sensing device as substantially related to said second wireless sensing device if said first signature is substantially related to said second signature.