Detection of a person hiding in an automobile by using human-generated microvibrations

This paper describes a new method for detecting the presence of a person hiding in an automobile. The human body is constantly generating signals, such as vibrations from the heartbeat, which are transmitted to contacting objects. Therefore, the detection of these vibrations can be used for judging the presence of a person. In the proposed method, vibrations in an automobile are detected by a low-frequency pressure sensor and then extraneous vibrations from wind and noise are removed using the appropriate bandpass filter. The method can be applied for vehicle security checks at the entrance of facilities such as airports and border inspection stations.