Collecting Data In Free Run Mode; Controlling Noggin Data Collection Speed In Free Run; Noggin Ground Speed In Free Run - Sensors & Software Noggin 100 User Manual

13-Survey & Map Mode

13.2.8 Collecting Data in Free Run Mode

If the Smart System is not using an odometer, and the user wants to collect data continuously in
time, ensure that the Trigger Method is set to "Free Run" (13.3.2.2: p.98). This means that the
system collects data even if it is not moving. This option is useful for collecting data when using
the odometer wheel is not practical:
In Free Run mode, the data acquisition screen (Figure 13-1) includes Pause and Continue
buttons to pause and restart data collection.
When the Smart System is used in Free Run mode, it is up to the user to keep track of
positioning by some other method, for example, a measuring tape, using fiducial markers
(13.2.4.2: p.80) or GPS (13.3.5: p.112).
In Free Run mode, data collection is dependent on two factors,
1) the speed that the Noggin system is collecting data and
2) the speed the Noggin system is moving.

13.2.8.1 Controlling Noggin Data Collection Speed in Free Run

In Free Run mode the user can control the speed the Noggin collects data by increasing or
decreasing the number of stacks (13.3.1.5: p.96). Increasing the number of Stacks has the effect
of slowing down the data collection speed of the Noggin system. Decreasing the number of
Stacks has the effect of speeding up the data collection speed.
The user can also control the speed of the Noggin data collection by adjusting a time delay
between data collection points. Note that if the time delay is greater than 0.1 seconds and an
external Beeper-Trigger is connected to the system, the Beeper-Trigger will emit a beeping
sound as the data trace is collected.

13.2.8.2 Noggin Ground Speed in Free Run

In Free Run mode, the speed the Noggin moves determines the distance between sample points
on the ground (station interval). This type of data collection requires experimenting with the
number of stacks and time delay (13.3.2.2: p.98) and practicing to find a satisfactory speed for
the Noggin. Moving too quickly may result in under-sampling the data making it more difficult to
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