Passenger sensing system

Details Passenger sensing system Passenger sensing system

1998-10-22

2000-08-15

Nguyen, Tan

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Vehicle subsystem or accessory control

701 46, 701 36, 280737, 280735, B60R 2132

Patent

active

061049727

ABSTRACT:
A background heat source unit 4 having a plurality of heat sources, which are arranged substantially at a fixed interval and set to a temperature different from the body temperature of passenger and also from the ambient temperature, and an infrared sensor 7, are disposed such that they face each other via a passenger. Whether a passenger is present is checked according to the result of a check, made by comparing a detected temperature pattern of the background heat source unit 4, detected by the infrared sensor 7, and a reference temperature pattern of the background heat source unit 4, preliminarily stored in a control circuit 17, as to whether a non-identical area is present in the compared temperature patterns.

REFERENCES:
patent: 5987370 (1999-11-01), Murphy et al.

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