Seismic method for vehicle detection and vehicle weight classification
First Claim
1. A method for detecting the passage of vehicles, comprising the steps of:
- locating a geophone on the ground at a known location and,processing the signals from the geophone to derive a density statistic number corresponding to the number of regular non-intermittent peaks of the geophone signal above a threshold set above a measured background level, whereby the number of non-intermittent peaks above the threshold indicate the presence of a vehicle, the background level being set using a standard deviation technique as a background level surrogate, the background level being set without computing square roots, the background level being set using
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Abstract
A system is provided for detecting the passage of vehicles and the classification thereof by weight using geophone outputs and a unique density measurement in which the number of peaks of the geophone signal above a predetermined threshold over a number of time frames indicates the presence of a vehicle, with the number of time frames in which the density exceeds the threshold indicating whether the vehicle is a heavy vehicle such as a tank, or a light vehicle such as a car, with the threshold eliminating both manmade and natural noise, as well as distinguishing seismic vibrations due to personnel and animals. In one embodiment, various thresholds are utilized to detect the onset of vehicle presence and the end of the event.
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11 Claims
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1. A method for detecting the passage of vehicles, comprising the steps of:
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locating a geophone on the ground at a known location and, processing the signals from the geophone to derive a density statistic number corresponding to the number of regular non-intermittent peaks of the geophone signal above a threshold set above a measured background level, whereby the number of non-intermittent peaks above the threshold indicate the presence of a vehicle, the background level being set using a standard deviation technique as a background level surrogate, the background level being set without computing square roots, the background level being set using - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification