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Race Technology Ltd. VAT reg. 715 9671 09
After 12, King Street, Eastwood, Nottingham, NG16 3DA, UK
Tel: +44 (0) 1773 537620 Fax: +44 (0) 1773 537621
Email: [email protected]
1.4
Why use GPS?
One of the key features of the DL1 CLUB is its built in high accuracy GPS system - this
gives the DL1 advantages over other data loggers in 2 key areas - greatly improved
track maps and far more accurate speed data.
1.4.1
Track Mapping
Conventional data loggers require a "closed circuit" to enable them to calculate the track
map; the shape of the track is estimated from a combination of the lateral acceleration
and speed. This works adequately in some situations but it becomes increasingly
inaccurate for long tracks and impossible for open circuits, motorbikes or boats. In
contrast, the GPS will produce high accuracy track maps in almost any situation.
1.4.2
Speed Measurement
While speed is probably the most important parameter that anyone wants to measure
using the data logging system, it is also the most inaccurate in a "conventional" system.
The normal way to measure speed is to simply attach a pickup to a wheel to detect how
fast it is rotating - but the rolling circumference of a tyre changes by 4% just with wear
and temperature. Even worse, the error increases significantly under race conditions
where the tyre is under load - typically the tyre slips by up to 20% under hard braking
going into a corner. Measuring speed using GPS is now common practice in high-end
systems - under typical conditions speed error is well under 1%!
1.5
DL1 CLUB Features
The DL1 CLUB is an all-new, 3rd generation, data logger system from Race
Technology. It is a complete redesign of the DL1, retaining all the best features and
improving and adding where possible. Some of the most noteworthy features include:
•
Built in GPS
The new GPS unit is based on our own high accuracy GPS3 technology and
calculates position and speed 5 times every second. This is easily the fastest, most
accurate GPS system available for under $1500. The measurements from the GPS
and accelerometers are combined to calculate very high accuracy positions and
speeds at 100 times a second. Optional storage of raw GPS data for post processing
at 20Hz is also possible.
•
Built in accelerometers
Built in 3-axis accelerometer with 2g full scale (optional 6g full scale).
•
Built in yaw gyro for slip angle measurement (optional)
•
Logging to SD cards
Works with SD and SDHC, for up to 32GB storage.
Summary of Contents for DL1 MK3
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