TDK CH101, User Manual

Page: 13 / 23

AN-000349
Document Number: AN-000349
Page 13 of 23
Revision: 1.0
3.3 UNDERSTANDING THE GUI OUTPUTS
The “Magnitude” plot displays the return echo signal as measured by the receive-only sensor. The first peak is the initialize phase of
the receive sensor, which results from powering up and waking the sensor. The second peak is the actual echo from the floor, that
was originally sent from the transmitter sensor. The relative magnitude of this peak determines whether the algorithm will classify the
floor as a soft floor (low amplitude) or hard floor (high amplitude).
The “Floor Type Metric” plot displays the algorithm’s calculated metric for the amplitude of the floor’s return echo over time. If the
RVC is transitioning between hard and soft floors, the metric’s displayed value will correspondingly change along such floor transitions.
While the RVC is moving, there will be some fluctuations in the floor type metric, and is normal sensor behavior.
The “Cliff Depth Estimate” plots the cliff detect algorithm’s estimate for the cliff depth/size over time. In the Magnitude plot, the floor
echo’s position will determine if the algorithm classifies the situation as a floor or cliff. If the e cho is too far away, or no echo is detected,
the algorithm will consider it a cliff situation. If the sensor or RVC is moved up and down relative to the floor, this plot will
correspondingly track the sensor/RVC’s vertical motion.