A curtain intrusion sensing device

摘要

A sensing device for detecting human intrusion into the load space of vehicles with curtain sides (1) comprises capacitive sensor strips (2) connected to sensor circuitry (3) wherein the strips have a field of view on the inside of the curtain only so as to detect the presence of humans in close proximity to the inside of the curtain but not the outside. The sensor strips have a grounded conductive strip on the one side to direct the capacitive sensing field to the inside of the curtain. Alarm means warn of human intrusion but the sensor is not affected by inanimate loads within the vehicle.