VB3i Technical Specification

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 (more information available here)	Minimum: 4 ms/ 8.5 ms (±1 ms) Fixed, no IMU integration: 15.5 ms/ 20 ms Fixed, with IMU integration: 20 ms

 

Distance
Accuracy	0.05 % (<50 cm per km)
Units	m / ft
Update rate	100 Hz
Resolution	1 cm

 

Absolute Positioning (RMS) - VB3i Single Antenna
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
Update rate	100 Hz
Resolution	1.8 mm

 

Absolute Positioning (RMS) - VB3iD Dual Antenna
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
Update rate	100 Hz
Resolution	1.8 mm

 

Absolute Positioning (RMS) - VB3iDR Dual Antenna with RTK
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	0.5 %
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

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.

Slip, Pitch, 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°

IMU Attitude Accuracies

Channels available when an IMU04 is used in conjunction with a VBOX 3i.

Attitude	Accuracy (RMS)
Pitch angle	0.06°
Roll angle	0.06°
Yaw Angle	0.5°

Outputs

CAN Bus
Bit rate	125 kbit/s, 250 kbit/s, 500 kbit/s and 1 Mbit/s selectable baud rate
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 – 5 V DC
Default setting (The range settings can be adjusted by the user in VBOX Tools Software)	Velocity 0.0125 Volts per km/h (0 – 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 – 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 e.g. TC8, FIM03, etc
External CAN Bus	Up to 16 channels of user definable CAN signal from external bus, e.g. Vehicle CAN bus Can load signal data from industry standard DBC database file
Other channels	Channels that fall outside of the ‘standard channel tab’ within VBOX Setup e.g. AD inputs, IMU KF channels, twin antennas channels, ADAS channels

 

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

 

Digital
Brake event trigger	DC to 44.4 kHz
On/Off logging control	Remote log control from hand-held switch

Environmental and Physical

Input Voltage	7 – 30 V DC
Power	5.5 W (maximum)
Size	170 mm x 121 mm x 41 mm
Operating Temperature	-20°C to +60°C
Weight	900 g (approximate)
Storage Temperature	-30°C to +80°C