Externally Mounted Sensors
NSMS instrumentation consists of a set of case mounted probes that accurately determine the arrival time of a blade tip at a particular
case location. Optical, capacitive and eddy current probes can be used for the arrival time measurement.
The example blade (fig.1) demonstrates how case mounted probes (red) placed at unequal distances record an arriving blade tip (green).
Probes are placed at pre-determined locations around the case. These locations are calculated by AMS software to optimize observation of specific engine orders. |