MicaSense DLS 2, Руководство по интеграции

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November 2020
Page 15 of 21
For details on how the sensor writes files to the storage device, see the File Storage section of
the
Sensor User Guide .
Automatic Capture/Triggering
RedEdge-MX supports three methods for capturing images: Overlap, Timer, and External
Trigger. To learn more about how to configure these settings, please see the
User Guide for
MicaSense Sensors .
Overlap (recommended)
In Overlap mode, when the aircraft climbs to within your chosen Target Altitude Tolerance
below your Target Altitude, RedEdge-MX will start capturing and only take a capture if it has
traveled forward enough distance to ensure the overlap percentage you have specified. Prior
to RedEdge-MX firmware release 7.1.0, the Target Altitude Tolerance was fixed at 50 meters,
but this can now be specified by the user. When the sensor's altitude is below the Target
Altitude Tolerance from the Target Altitude, the sensor stops capturing. Overlap mode only
calculates the forward overlap, and cannot account for the side overlap, which must be
calculated in a flight planner, using the sensor’s field of view to create an appropriate row
spacing.
We recommend this mode because it helps ensure proper overlap (75% or higher), which is
essential in order to produce high-quality output when processing the data in standard
photogrammetry software.
Timer
When in timer mode, RedEdge-MX will capture according to the timer period, which is every
two seconds by default. If the timer period is set to capture faster than the storage device can
write the captures, inconsistent capture intervals may result. The capture rate is heavily
dependent on the write speed of the attached storage device, and is prone to unreliable
physical capture spacing if the aircraft does not travel at a constant ground speed. See the USB
Storage and Ethernet and Capture Rate headings in this guide for more details.
External Triggering
For more control, you can enable external trigger mode to talk to RedEdge-MX by PWM or
edge triggering. See the inputs and outputs section of this document for detailed pin
information.
© 2020 MicaSense, Inc