Products

Overview

The VBOX 3i RTK is an RTK enabled version of the VBOX 3i Dual Antenna which can be used in conjunction with an RTK differential Base Station to obtain ±2 cm positional accuracy.

This top-of-the-range data logger combines all the advantages of a twin antenna GPS setup with GLONASS satellite tracking and can be used in any number of vehicle tests where positional accuracy and repeatability are of the utmost importance.

2 cm Positional Accuracy
For tests where positional accuracy is of key importance, like lane departure testing, distance to a fixed object, or precise mapping, the VBOX 3i RTK offers industry-leading 2 cm positional accuracy, in real time, at 100 Hz!

VBOX 3i RTK is the key data acquisition unit of the RACELOGIC ADAS Test Systems for measuring vehicle separation, time to collision, position within a lane, and more to 2 cm precision.

Slip and Pitch/Roll measurement using two antennas
Utilising two GPS/GLONASS antennas, the VBOX 3i RTK measures all of the normal VBOX GPS parameters, plus the azimuth and elevation between the antennas, i.e. the direction the antennas are pointing, and the angle between them measured from the horizontal. This allows the unit to measure slip angle, and also pitch angle (or roll angle depending on how the antennas are mounted), all at 100 Hz.

Both the VBOX and the Base Station track the Russian GLONASS range of navigation satellites as well as the normal GPS constellation, using almost twice as many measurements for accurate results and reception in areas of poor satellite visibility. Read more on VBOX GPS accuracy.

VBOX 3i Dual Antenna RTK comes with a VBOX Manager, a display enabling you to change the dynamic modes and filter settings, set up slip angle data and define antenna locations.

A Dual Antenna Mounting Pole (needs to be ordered separately) ensures optimum antenna separation and the most accurate attitude measurement.

Applications

Centimetre-level position accuracy can be used for a number of standard industry tests. For example:
• Lane Departure Warning - 2 cm accuracy combined with synchronised video
• Adaptive Cruise Control - 2 cm vehicle to vehicle accuracy
• Collision Avoidance Systems - Vehicle to point, vehicle to vehicle
• Blind Spot Detection - Calibrated video overlay
• Rear Cross Traffic Detection Testing
In addition:
• Track Mapping and Route Profiling - Height is also improved to within ±2 cm
• Driving Line Analysis - Precise track position allows the ultimate analysis
The VBOX Tools software analysis package allows you to carry out sophisticated tests in real-time and in post processing.
All parameters can be viewed in a customisable graph, and the data can be scanned, analysed and manipulated using the very powerful Report Generator function.
RepGen is very customizable, allowing results to be produced for virtually any type of automotive test. All created configurations can be saved and easily recalled for future analysis.
VBOX Tools is able to load signal data from an industry standard CAN database file (.DBC).


Parameters
VB3iSLR measures the following parameters at 100 samples per second:
• Time
• Position
• Velocity
• Vertical velocity
• Longitudinal velocity
• Lateral velocity
• Heading
• True heading
• Height
• Lateral acceleration
• Longitudinal acceleration
• Slip angle
• Pitch angle
• Yaw rate
• Radius of turn
• Centreline deviation
• Distance between two cars


Many other external parameters can be logged either:
• by using the four high resolution analogue inputs built into the unit
• from a number of versatile RACELOGIC VBOX Input Modules
• or directly from the CAN bus of the vehicle using the RACELOGIC Vehicle CAN Database.


Specifications
All specifications refer to VBOX 3i Dual Antenna RTK (RLVB3iSLR - IMU04 ready).
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: 8.5 ±1.5 mS****

Absolute Positioning
• Accuracy: 2 m*
• Accuracy with SBAS DGPS: >1 m*
• Accuracy with EGNOS DGPS: 70 cm*
• Accuracy with WAAS DGPS: 1.5 m*
• Accuracy with RTCM DGPS: 80 cm*
• Accuracy with RTK DGPS: 2 cm*
• Update rate: 100 Hz
• Resolution: 1.8 mm
• Height accuracy: 6 m*
• Height accuracy with DGPS: 2 m*
• Height accuracy with RTK DGPS: 2 cm*

Distance
• Accuracy: 0.05 % (<50 cm per Km)
• Units: Metres / Feet
• Update rate: 100 Hz
• Resolution: 1 cm

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

Accel/Brake Test Time
(Multifunction Display / VBOX Tools)
• Resolution: 0.01 s
• Accuracy: 0.01 s

Lap Timing(OLED Display / VBOX Tools)
• Resolution: 0.01 s
• Accuracy: 0.01 s **

Brake Stop Accuracy
• Accuracy: ± 1.8 cm(for a typical 100-0 km/h brake stop)

Heading
• Resolution: 0.01°
• Accuracy: 0.1°

Memory
• Compact Flash: Type I
• Recording time: Dependent on flash card capacity***

Power
• Input Voltage Range: 7 – 30V DC
• Power: Max. 5.5 Watts

Slip Angle Accuracy
• <0.2° rms at 0.5 m antenna separation
• <0.1° rms at 1.0 m antenna separation
• <0.067° rms at 1.5 m antenna separation
• <0.05° rms at 2.0 m antenna separation
• <0.04° rms at 2.5 m antenna separation

Pitch/Roll Angle Accuracy
• <0.14° rms at 0.5 m antenna separation
• <0.07° rms at 1.0 m antenna separation
• <0.047° rms at 1.5 m antenna separation
• <0.035° rms at 2.0 m antenna separation
• <0.028° rms at 2.5 m antenna separation

Environmental and Physical
• Weight: Approx. 900 grams
• Size: 170 x 121 x 41 mm
• Operating temperature: -20°C to +70°C
• Storage temperature: -30°C to +80°C

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