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RACELOGIC Support Centre

Technical Specifications - VBOX 3i RTK (v5)

This page covers the technical specifications for VBOX 3i RTK v5 units (VB3iSLR-V5, VB3iDR-V5 and VB3iDR-V5a), for areas such as GPS, Slip, Pitch and Roll accuracies, IMU attitude accuracies, inputs, environmental and physical attributes.
Definitions
* Specifications will vary depending on the number of satellites used, obstructions, satellite geometry (PDOP), multipath effects, and atmospheric conditions.
For maximum system accuracy, always follow best practices for GNSS data collection.
** Not using DGPS and crossing the start/finish line at 100 km/h.
*** Approximately 29 MB per hour used when logging GPS data at 100 Hz; Approx. 182 MB per hour total logging capacity.

 

GPS Specifications
Velocity
Accuracy 0.1 km/h (averaged over 4 samples)
Units km/h or mph
Update Rate 100 Hz
Maximum Velocity 1000 mph
Minimum Velocity 0.1 km/h
Resolution 0.01 km/h
Latency
  • Minimum: 4 ms/ 8.5 ms (±1 ms)
  • Fixed CAN delay, no IMU integration: 15.5 ms/ 20 ms
  • Fixed CAN delay, with IMU integration: 20 ms

 

Distance
Accuracy 0.05 % (< 50 cm per km)
Units metres or feet
Update rate 100 Hz
Resolution 1 cm

 

Absolute Positioning (RMS) 
Accuracy* (Standalone) V: 1.8 m; H: 1.2 m
Accuracy* with SBAS V: 1.2 m; H: 0.8 m
Accuracy* with DGPS V: 0.5 m; H: 0.3 m
Accuracy* with RTK V: 10 mm; H: 5 mm
Update rate 100 Hz
Resolution 1.8 mm

 

Time
Accel/Brake Test (MFD/VBOX Test Suite) Lap Timing (MFD/VBOX Test Suite)
Resolution 0.01 s Resolution 0.01 s
Accuracy 0.01 s Accuracy 0.01 s**

 

Acceleration 
Accuracy 0.50 %
Maximum 20 G
Resolution 0.01 G
Update rate 100 Hz

 

Heading
Resolution 0.01°
Accuracy 0.1°

 

Memory
Compact Flash Type I
Recording Time Dependent on flash card capacity***

 

Brake Stop Accuracy
Accuracy ± 1.8 cm

 

Slip, Pitch and Roll Angle Accuracies
Antenna Separation Slip Angle (RMS) Pitch / Roll Angle (RMS)
0.5 m < 0.2° < 0.14°
1.0 m < 0.1° < 0.07°
1.5 m < 0.067° < 0.047°
2.0 m < 0.05° < 0.035°
2.5 m < 0.04° < 0.028°
Outputs
CAN Bus
Bit rate

Selectable baud rate:

  • 125 kbit/s
  • 250 kbit/s
  • 500 kbit/s 
  • 1 Mbit/s 
Identifier type Standard 11 bit 2.0 A
Data available
  • Satellites in View
  • Latitude
  • Longitude
  • Velocity
  • Heading
  • Altitude
  • Vertical Velocity
  • Distance
  • Longitudinal Acceleration
  • Lateral Acceleration
  • Distance from Trigger
  • Trigger Time
  • Trigger Velocity

 

Analogue
Voltage range

0 to 5 V DC

(Electrically isolated allowing for a current draw of up to 120 mA.)

Default setting
(The range settings can be adjusted by the user in VBOX Tools Software)

Velocity

(0.0125 Volts per km/h (0 to 400 km/h))

Accuracy 0.1 km/h
Update rate 100 Hz

 

Digital
Frequency range  DC to 44.4 kHz

Default setting
(The range settings can be adjusted by the user in VBOX Tools Software)

 

Velocity

(25 Hz per km/h (0 to 400 km/h)

90 pulses per metre

Accuracy  0.1 km/h 
Update rate  100 Hz

 

Inputs
CAN Bus
RACELOGIC modules  Up to 32 channels from any combination of Racelogic modules, such as TC8, FIM02, YAW03, etc. 
External CAN Bus 

Up to 16 channels of user-definable CAN signals from an external bus, such as Vehicle CAN bus.

Can load signal data from an industry standard DBC database file.

Other channels  Channels that fall outside of the standard channel tab in VBOX Setup, such as AD inputs, IMU KF channels, twin antennas channels and ADAS channels.

 

Analogue   VB3iDR-V5 VB3iDR-V5a
Number of channels 4 2
Input range ± 50 V ± 50 V
Channel sample order Synchronous Synchronous
DC accuracy ± 2 mV (calibrated at 23° C) ± 2 mV (calibrated at 23° C)

 

Digital
Brake event trigger  25 ns resolution
On/Off logging control  Remote log control from hand-held switch

 

Environmental and Physical
Input Voltage 7 to 30 V DC
Power 5.5 W (maximum)
Size 170 mm x 121 mm x 41 mm
Operating Temperature – 20° C to + 70° C
Weight 900 g (approximate)
Storage Temperature – 30° C to + 80° C
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