When you hear the term microcut in the context of airbag sensors, it sounds like it would refer to a very fine cut occurring in the airbag. It actually means something quite different. In the PSI5 airbag network specification, microcuts are extremely brief interruptions in the power supply to the sensor following an impact. The PSI5 spec requires a standard microcut rejection time or period when no reset is allowed of a minimum of 0.5 µs. The optional requirement is a rejection time of 10 µs minimum. Bosch’s latest SMA6xy generation of acceleration sensors can now tolerate interruptions of up to 10 microseconds meeting the optional requirement. With measurement ranges of 120, 240, or 480 g (type SMA68x and SMA69x), sensors are now also available with a z channel for measuring acceleration in the vertical axis.
For more information about Bosch SMA6xy type PSI5 acceleration sensors, click here.
Filed Under: Sensor Tips