VBOX III 100Hz Datalogger
The VBOX III uses a very fast GPS engine which allows you to perform detailed
analysis of Braking, Accelerating, Handling and Circuit testing. The VBOX
will fit to a car in 30s, and requires no setting up or calibration.
In addition to measuring these parameters, the VBOX III has 4x 24bit analogue
input channels, 8 CAN channels (OEM Vehicle CAN data translation available)
, two analogue outputs and two digital outputs.
High performance
The system uses a survey grade 100Hz GPS that calculates each measurement 100
times a second without any interpolation, so that each reading
is independant of all previous readings. This allows the user to record Velocity,
Time, Position, Acceleration & Distance at 100Hz. The data is stored on
a removable compact flash card. The true 100Hz update rate means the VBOXIII
has a real latency of only 12.5ms making it the fatest GPS engine currently
available.
High accuracy
A VBOXIII running at 100Hz can measure a full ABS brake stop distance to within
±5cm, guaranteed, everytime. This has been tested and verified by many
leading car manufacturer's and tyre companies throughout the world, which is
why it is accepted as one of the few pieces of equipment to give this level
of brake stop accuracy.
Please have a look under Accuracy
to see how we verify these accuracy figures.
High precision
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Also available is the VBOXIII equipped with hardware which allows it
to be used with an RTK differential Base Station.This makes it
possible to achieve positional accuracy up to ±1cm, taking the
VBOXIII to a new level of precision measurement.
There are two versions of the RTK system, one which uses the normal GPS
satellites (RLVB3R5), and one which uses the Russian Glonass systems as
well (RLVB3R2G2). The advantage of usiing the Glonass system is faster
start-up times, much faster re-acquisition times and increased robustness.
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If you are testing in a wide open area without any trees or bridges,
then the non-Glonass version would be fine, but anywhere else, you would
need the additional Glonass option.
Start up times
GPS only - 4-10 minutes
GPS+Glonass - <2minutes
Re-acquisition times
GPS only - 4-10 minutes
GPS+Glonass - <15s
Re-aquisition is when satellite lock is temporarily lost during operation
due to trees, buildings or bridges.
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Log Channels
The following parameters can be logged simultaneously at 100Hz:
- Time
- Velocity over ground (kmh/mph)
- Lateral acceleration (g)
- Longitudinal acceleration (g)
- Heading (degrees true north)
- Distance (metres)
- 4x Analogue inputs (±50v)
- 8x CAN inputs from vehicle
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- Latitude (minutes)
- Longitude (minutes)
- Height (meters/feet)
- Vertical velocity (kmh/mph)
- Satellites
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Outputs
- Digital
Velocity 90-1000 pulses per metre.
- CAN
All parameters - 1Mbit default.
- RS232
All parameters - 115200 baud.
- Analogue
Velocity 0-5v, scale adjustable.
Note: Values shown are defaults. The range of the Analogue and digital outputs are fully configurable via the VBOX Windows software.
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There are two different types of display that can be used in the vehicle, see displays for more information.
Inputs
- Brake trigger
Scanned at 100KHz.
- Various Input Modules
The VBOX can also be connected to a number of external Racelogic modules to measure external signals such as Analogue, Digital, Thermocouple, Frequency and CAN. Racelogic also offer two inertial input modules.
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Versatile
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The VBOX III allows an unprecendented amount of parameters to be logged from a compact self-contained data logger. In the exmaple on the right, all four wheelspeeds have been extracted from the CAN bus of the Vehicle and overlaid with the true vehicle speed.
A maths channel in the VBOX software has been used to calculate individual wheelslip %, and is plotted above the other curves.
In addition, you could also display X&Y acceleration, distance travelled, engine RPM, four analogue channels, heading, height, vertical velocity and vehicle position, without any additional sensors or modules.
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