Method for detecting wear of seat cushion and detection device therefor
AssigneeSafran Seats
InventorsJean-Marc Obadia, Lisandre Marcovici-Soulage
Life of this patent
Estimating the term…
Abstract
Disclosed is a method for detecting the wear of a cushion of a seat or a backrest of a seat, comprising determining the state of wear of the cushion according to a predetermined minimum threshold value of the thickness of the cushion below which the cushion is considered to be worn.
Claims7
Method for detecting a state of wear of a cushion of a seat or a backrest of a seat, comprising determining the state of wear of the cushion according to a predetermined minimum threshold value of a thickness of the cushion below which the cushion is considered to be worn, determining the wear of the cushion being carried out when a presence of a person on the seat is detected,
- determining the state of wear of the cushion comprising detecting an element to be detected disposed in the cushion at a distance from a sensor indicating the thickness of the cushion less than the predetermined minimum threshold value,
- the element to be detected being a magnet and the sensor being a sensor sensitive to a magnetic field of the magnet and reacting according to the proximity of the magnet, the sensor being used according to a first detection level to detect a presence of a passenger on the seat, and according to a second detection level to detect the wear of the cushion according to the value of the magnetic field corresponding to the distance between the magnet and the sensor.
Seat comprising a cushion of a backrest or a seat of the seat and a device for detecting a state of wear of the cushion, the detection device including means for determining a thickness of the cushion according to a predetermined minimum threshold value of the thickness of the cushion below which the cushion is considered to be worn, the device for detecting the state of wear of the cushion further comprises means for detecting a presence of a person on the seat, the operation of the means for determining the thickness of the cushion being dependent on the presence of a person sitting on the seat,
- the means for determining the thickness of the cushion including a sensor capable of detecting when an element to be detected disposed in the cushion is at a distance indicating a thickness of the cushion less than a predetermined minimum threshold value,
- the element to be detected being a magnet and the sensor being a sensor sensitive to a magnetic field of the magnet and reacting according to the proximity of the magnet, and
- the determining means being configured to detect the presence of a passenger on the seat according to a first detection level, and to detect the state of wear of the cushion according to a second detection level according to the value of the magnetic field corresponding to the distance between the magnet and the sensor.
Dependencies are inferred from the claim text.