JAMAR Technologies TRAX I, Руководство пользователя

Страница: 35 / 64

4-3
able to get volume data, not class, speed, etc.
• Since Basic data collection requires the time stamping of each indi-
vidual axle, it requires a great deal more memory space in the TRAX I.
We strongly suggest that unless you are interested in the most basic,
raw information of a study, use either the volume only, binned or per
vehicle setting to record your data.
• The following examples of how the data is recorded do not apply to
the Basic data mode. Basic data is a collection of sensor activations
that are then later grouped into usable data by the software.
The diagrams for the following layouts assume a length of twelve feet per
lane of traffic and are shown for round tube and mini tube.
L 1 ó Two Channels ó A, B ó Basic, Volume
In this layout, channel “A” and channel “B” record independently. When in
Volume mode the TRAX I can do either a straight axle count or use the
divide-by-two technique.
EXAMPLE: The TRAX I has been programmed to use the divide-by-two
technique. As a passenger car passes over the “A”, the unit records one
count. As a four axle truck passes over the “A” tube the unit records two
counts.
A
B
TRAX I
24 ft. 26 ft. Mini
36 ft. Round
24 ft.
36 ft. Round
26 ft. Mini
Chapter 4 — Road Tube Layouts