This sensor is used for detecting structural born vibrations
in spark ignition engines due to uncontrolled
combustion. This sensor is suitable for operation in extreme
conditions.
Due to the inertia of the seismic mass, the sensor
moves in correlation to the engine block vibration; this
motion results in a compressive force which is converted
into a voltage signal via a piezoceramic sensor element.
As a result, upper and lower voltage thresholds
can be defined directly correlating to an acceleration
magnitude.
The main benefits of this sensor are its robust mechanical
design, compact housing and precise determination
of structure-related noise. The small packaging
is accomplished by integrating the connector directly
to the sensor.