We describe a novel approach to target counting and speed estimation using the envelope of the seismic and acoustic signals. This approach is particularly well suited to low-cost, low-power sensors that lack the ability to determine target bearing and separation. We present methods for envelope peak detection, target detection, and speed estimation. Results of a field evaluation of one implementation of the algorithms are also presented.
Chemical and biological weapons pose a serious threat to the United States armed forces. Early detection of a chemical or biological attack is critical to the safety of soldiers in the field. The Edgewood Chemical and Biological Center (ECBC) is conducting a study using currently fielded seismic and acoustic sensors to detect chemical and biological attacks. This paper presents some preliminary results.