The Racelogic Velocity Box from M-Tech

Non Contact speed and distance measurement using GPS

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VBOX III

The VBOX III uses GPS to allow you to perform detailed analysis of Braking, accelerating, handling and circuit testing. The VBOX will fit to a car in 30 seconds, and requires no setting up or calibration.

The system uses a survey grade 100Hz GPS engine to record Velocity, Time, Position, Acceleration & Distance at 100Hz. The data is stored on a removable compact flash card.

In addition to measuring these parameters, the VBOX III has 4x 24bit analogue input channels, 8 CAN channels, two analogue outputs and two digital outputs.


The following parameters can be logged simultaneously at 100Hz:
 
Satellites  
Time Heading (degrees true north)
Latitude (minutes)
Longitude (minutes)
Velocity over ground (kmh/mph)
Height (meters/feet)
Vertical velocity (kmh/mph)
Distance (metres)
Lateral acceleration (g) 4x Analogue inputs (±50v)
Longitudinal acceleration (g) 8x CAN inputs from vehicle
   

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 Tools software.

 
 
 

Inputs:
Brake trigger input (scanned at 100KHz)

The VBOX can also be connected to a number of modules to measure external signals such as Analogue, Digital, Thermocouple, Frequency and CAN.

There are two different types of display that can be used in the vehicle, see displays for more information.

 


VBOXIII and 2cm Accuracy - the RLVB3R5


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 2cm, taking the VBOXIII to a new level of precision measurement.

If the RTK option is in use, the VBOX log rate is set to 50Hz. However for all applications which do not require such exact positional accuracy the RLVB3R5 can still be used in its standard 100Hz form.


Versatile

The VBOX III allows an unprecedented amount of parameters to be logged from a compact self-contained data logger. In the example on the right, all four wheel speeds 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 wheel slip as %, 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.



 

Datasheet for the VBOX III
User guide for the VBOX III

 
 

 

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