Patent ID: 8330609

Claim:
A passenger detection system comprising: a satellite sensor circuit; and a master determination unit, the satellite sensor circuit comprising: an antenna electrode which is provided in at least one of a seating face or a back face of a seat; and an electric field generation unit which generates an electric field around the antenna electrode, and generates a current signal based on the electric field, the master determination unit comprising: a current detection unit which detects a variation of the current signal; and a control unit which determines a sitting situation of a passenger by comparing signal data with threshold data, the signal data being related to a current signal which flows based on the electric field which is obtained from the current detection unit and which is generated at the antenna electrode, the threshold data being related to the sitting situation of the passenger, wherein the satellite sensor circuit and the master determination unit are connected via a power supply line and a ground line, the electric field generation unit generates the electric field based on the voltage supplied from the master determination unit to the power supply line, and the electric field generation unit supplies the current signal to the power supply line.