Context and principle of anti-pinch
Nowadays, more and more opening devices are becoming motorized on vehicles: windows, roof, sliding side doors, trunk… So as to guarantee user safety, anti-pinch standards were made and have become mandatory. Two methods are developed by industrialists:
- Direct detection: very reliable but quiet expensive
- Indirect detection thanks to speed measurements: pretty popular, but complicated to calibrate and it sometimes reacts “too late”.
Anti-pinch is increasingly regulated on systems with electro-mechanic closure, either for windows or doors. For instance, European standards for electrical windows require an anti-pinch system between 100 and 125 N, meaning between 10 and 12 kg. It is one of the problems industrialists and vehicle manufacturers have to cope with.