The aim of the study was to design a sensor able to measure induced stresses in textiles. We chose to use PVDF sensors because of their insertion capability in fabrics. The general metrology method has been adapted to avoid noise problems. So measurement has been oriented on study of resonant frequency variations of the sensor. Sensor behaviour is linear, either with compressive and non-compressive foam. Statistical study shows that the difference between slopes for the different 'complex' fabrics studied is significant in most cases. There is no correlation between Kawabata compression parameters and slopes when the surface fabric varies. When the foam constituting the 'complex' fabric varies, slopes can be divided in three groups corresponding to the general compression behaviour of the foam. A future application of this instrumented fabric could be in automotive field to contribute to 'smart' airbags development, able to provide appropriate inflation depending on passenger morphology and positioning. In fact, airbags are really efficient but present a number of hazards. These hazards are firstly linked with the own system: burns due to high temperature gas propulsion, auditory lesions caused by explosion noise, explosive toxicity. All other hazards are linked with a 'bad use' of the airbag, i.e. car occupant is 'out of position'. What are called 'out of position' are all the cases when car-seat is abnormally occupied. For example when car-seat is empty (airbag inflation is not necessary), when passenger is not far enough from airbag (he can be face hurt), or when an infant safety seat is placed on car-seat (absolutely no inflation). That's why information about car occupant is necessary. Such information could be obtained by integrating sensors in car-seat fabrics. Sensor function will therefore be to detect passenger occupancy and to weigh him. Depending on this information, airbags will be disconnected, partially or totally inflated. Taking into account results obtained by the metrology method developed, study of phase should work to weigh car passenger. To complete the study, the sensor has to be tested in real case, i.e. inserted in a car-seat, a human body in contact with influence of external parameters like temperature or vibrations has to be checked, knowing that the sensor is not depending on moisture.
A smart sensor for induced stresses measurement in automotive textiles
Ein intelligenter Sensor für die Messung induzierter Spannungen in Automobiltextilien
2006
6 Seiten, 5 Bilder, 4 Tabellen, 5 Quellen
Aufsatz (Konferenz)
Englisch
A smart sensor for compression measurement in automotive textiles
Tema Archiv | 2007
|Tema Archiv | 1999
|TIBKAT | 1995
|Tema Archiv | 1999
|UNCONVENTIONAL AUTOMOTIVE TEXTILES
British Library Conference Proceedings | 2000
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