10
IMCA M 229
Figure 6 – Operation geometry and reported range
7.2.2
Bearing
The bearing measurement is derived from the energy peak of the reflection as detected by the
360º rotating antenna.
The combination of the angular position of the rotor (measured by the encoder disc) and the
reflection data (sensed by the antenna) allows for an accurate and consistent bearing
measurement.
Figure 7 – Bearing measurement
The (Tx-Rx) FMCW signal generated by the transceiver is sampled and processed so that the
energy peak can accurately be measured by a sample position
i
(Figure 7), which is then
converted to a bearing measurement using the corresponding encoder count
I
.
The encoder also provides a fixed marker position, which is indicated by the direction of the
connection panel on the sensor. It represents a fixed reference point (reference bearing) used
to provide a consistent relative bearing measurement. The convention is that the bearing
reported by the sensor shows 0º when the antenna is facing the connection panel and increases
in a clockwise direction.
Summary of Contents for Mini RadaScan
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