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Device for the classification of seat occupancy

A seat and seat technology, applied in the special position of the vehicle, vehicle seat, transportation and packaging, etc., can solve the problems of independent pressure unit limitation, reduce the application field of sensors, etc., achieve simple design and reduce sensor design Easy to work with, geometry resolution

Inactive Publication Date: 2006-12-20
IEE INT ELECTRONICS & ENG SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the number of independent pressure cells in a categorical seat occupancy sensor is limited by the sensing mat design constraints
[0006] Clearly, the limitation in the number of independent sensors creates a limitation in the spatial resolution of the sensing, which may reduce the field of application of these sensors

Method used

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  • Device for the classification of seat occupancy
  • Device for the classification of seat occupancy
  • Device for the classification of seat occupancy

Examples

Experimental program
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Embodiment Construction

[0033] figure 1 A plan view of a vehicle seat 10 equipped with an embodiment of a seat occupancy detection device 12 is schematically shown. The seat occupancy detection device 12 generally includes a sensing layer 14 associated with a seat seating surface 16 . A homogeneous sensing layer 14 has at least one electrical property, such as electrical resistance, that depends on the compressive deformation of the sensing layer 14 .

[0034] At the edges defining the periphery of the sensing area of ​​the sensing layer, the sensing layer 14 is equipped with a plurality of electrodes 18 . The electrodes 18 are arranged equidistantly along the longitudinal edges of the sensing layer 14 and along the transverse edges.

[0035] It should be noted that in the illustrated embodiment the electrodes 18 are distributed along the entire length of each edge. However, it should be understood that other embodiments are possible in which no electrodes are arranged in the corners of the sensing ...

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PUM

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Abstract

A seat occupancy sensor (12) comprises a sensing layer (14) associated to a seating surface of a seat, which has at least one electrical property varying locally in response to a pressure and / or deformation applied to said sensing layer (14). The device further comprises a plurality of electrodes (18) associated to said sensing layer (14) at a periphery of a sensing area, and a control unit (20) connected to said electrodes (18), said control unit (20) comprising means for evaluating a pressure profile acting on said sensing layer (14) by determining said at least one electrical property between pairs of electrodes (18) selected from said plurality of electrodes. The invention also relates to a method for the detection of seat occupancy comprising the steps of: c) determining said at least one electrical property of said sensing layer (14) between pairs of different locations situated at a periphery of a sensing area, and d) evaluating a pressure profile acting on said sensing layer (14) based on the determined electrical property values.

Description

technical field [0001] The invention relates to a method and device for seat occupancy classification. The invention relates more particularly to a device for evaluating the pressure profile acting on the surface of a vehicle seat, said pressure profile being suitable for use in a classification algorithm. Background technique [0002] To protect the lives of passengers during traffic accidents, modern vehicles are generally fitted with protective systems including several airbags and seat belt pretensioners, which are used to absorb the energy released by passengers during a collision resulting from an accident. Obviously, such protection systems are most effective when they are well adapted to the specific needs of the actual seat occupancy. This is why a microprocessor-controlled restraint system has been devised which offers several modes of operation as a function of the stature of the occupant in the seat, allowing for example adaptation to the moment of airbag deploy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60R21/01B60N2/90B60R21/015
CPCB60R21/01532B60R21/015B60R21/01516
Inventor 伊薇斯·德科斯特
Owner IEE INT ELECTRONICS & ENG SA
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