Passenger detection apparatus
First Claim
1. :
- A passenger detection apparatus for detecting whether a passenger sits in a seat of a vehicle, comprising a pair of thermopile sensors disposed in a horizontal direction at a predetermined distance from each other, and a subtraction means for taking out an output difference of detection values which are output from the pair of thermopile sensors, wherein the pair of thermopile sensors are disposed such that the thermopile sensors monitor a predetermined same position of the seat or around the seat when the passenger does not sit in the seat.
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Accused Products
Abstract
It is an object of the invention to determine whether a passenger sits in a passenger seat or backseat, and if YES, determine whether the passenger is an adult or a child, and whether the passenger is sitting in a normal attitude. A pair of thermopile sensors 13 and 14 are disposed on a dashboard 11 at a predetermined distance from each other in a horizontal direction. The pair of thermopile sensors 13 and 14 are disposed such that they monitor a predetermined same position P on a surface of the passenger seat 12 when a passenger 15 does not sit in a passenger seat 12. Output signal which are output from the pair of thermopile sensors 13 and 14 are subtracted by a subtraction circuit 25, an output difference signal of the pair of thermopile sensors 13 and 14 is taken out, and it is detected whether a passenger sits in the seat by this signal.
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Citations
7 Claims
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1. :
- A passenger detection apparatus for detecting whether a passenger sits in a seat of a vehicle, comprising a pair of thermopile sensors disposed in a horizontal direction at a predetermined distance from each other, and a subtraction means for taking out an output difference of detection values which are output from the pair of thermopile sensors, wherein the pair of thermopile sensors are disposed such that the thermopile sensors monitor a predetermined same position of the seat or around the seat when the passenger does not sit in the seat.
- View Dependent Claims (2, 3, 4, 5, 6, 7)
Specification