Passenger detection system
AssigneeDenso Corporation
InventorShingo Wanami
Life of this patent
Estimating the term…
Abstract
A passenger detection system for a person on a seat of a vehicle, includes a long range capacitance sensor for measuring a long range capacitance between a seating portion of the seat and a body of the vehicle and a short range capacitance sensor for measuring a short range capacitance in the seat, and a detection unit for detecting a passenger on the seat based on the measured long range capacitance and the measured short range capacitance. Therefore, the passenger detection system accurately detects a passenger on the seat of the vehicle while suppressing a detection error caused by an external effect.
Claims21
A passenger detection system for a person on a seat of a vehicle, comprising:
- a first capacitance sensor for measuring a first capacitance between a seating portion of the seat and a body of the vehicle;
- a second capacitance sensor different than the first capacitance sensor for measuring a second capacitance within the seating portion of the seat;
- and
- a detection unit which detects a passenger on the seat based on the measured first capacitance and the measured second capacitance;
- wherein
- the detection unit detects the passenger on the seat base on a comparison between the measured first capacitance and a variable first threshold value, the variable first threshold value being continuously determined by a comparison between the measured first capacitance and the measured second capacitance.
A passenger detection system for a person on a seat of a vehicle, comprising:
- a first capacitance sensor having electrodes spaced a first distance for measuring a first capacitance between a seating portion of the seat and a body of the vehicle;
- a second capacitance sensor having electrodes spaced a second distance less than the first distance for measuring a second capacitance within the seating portion of the seat;
- and
- a detection unit which detects a passenger on the seat based on the measured first capacitance and the measured second capacitance;
- wherein
- the detection unit detects the passenger on the seat base on a comparison between the measured first capacitance and a variable first threshold value, the variable first threshold value being continuously determined by a comparison between the measured first capacitance and the measured second capacitance.
A passenger detection system for a person on a seat of a vehicle, comprising:
- a first capacitance sensor for measuring a first capacitance between a seating portion of the seat and a backrest portion of the seat of the vehicle;
- a second capacitance sensor for measuring a second capacitance within the seating portion of the seat;
- and
- a detection unit which detects a passenger on the seat based on the measured first capacitance and the measured second capacitance;
- wherein
- the detection unit detects the passenger on the seat base on a comparison between the measured first capacitance and a variable first threshold value, the variable first threshold value being continuously determined by a comparison between the measured first capacitance and the measured second capacitance.
Dependencies are inferred from the claim text.