bwifi Sensors

RPM

MEX can read RPMs up to four inputs.

../../_images/sensors_rpm.png

RPM section

  • Units: Sensor conversion factor. It can be Custom, Radians per pulse or Pulse per cycle.

  • Average: Filter to prevent voltaje spikes. The readout of the pulse can be filtered as an average output. The amount of measurements to do the average needs to be specified.

  • Minimum: Here the minimum expected pulse period needs to be specified. This will discard spurius pulses (e.g. induced by EMI) which are smaller than this minimum pulse.

  • Maximum: The maximum period of time allowed without capturing. If no incoming pulse is received for more than this time, the output RPMs will be 0.

An example about sending RPMs can be found in Reading/Sending RPMs of the Integration examples section.

Magnetometer

../../_images/sensors_magnetometer.png

Magnetometer section

Magnetometer matrix: This rotation matrix represents the rotation of MEX coordinates respect to the aircraft body.

The axis of MEX are physically drawn on the device. The coordinates axis of the aircraft are like other Veronte products, which are defined by the Standard Aeronautical Convention.

../../_images/sensors_aircraft-axis.png

Aircraft coordinates (Standard Aeornautical Convention)

  • Sensor filter: The magnetometer measurements may vary with high frequencies and be difficult to read.

    To solve this problem, MEX has a second order low-pass filter to mitigate high frequency variations. The filter can be enabled clicking on the checkbox.

  • Cutoff frequency: Frequency variations higher than this value will be filtered (if the filter is enabled).