VBOX 3iS

Compact GNSS-aided Inertial Navigation System (INS) with integrated IMU and wheel speed data from the vehicle’s CAN bus

  • Reliable position & velocity in areas with poor GNSS
  • Connects to your existing control system or data logger
  • Ideal for multi-vehicle, multi-target ADAS testing
  • Compatible with steering robots
  • VBOX 3iSDR model adds RTK and dual antenna

VBOX 3iS is the industry standard GNSS-aided Inertial Navigation system, offering an efficient solution for high-accuracy ADAS and vehicle dynamics testing – available as the standard VBOX 3iS or the new VBOX 3iSDR.

Featuring the latest multi-constellation, multi-frequency GNSS receiver, VBOX 3iS delivers robust location and position data. Accuracy is further enhanced by the internal high-grade Inertial Measurement Unit (IMU) which smoothly fills any gaps in GNSS reception for short periods of time. For longer periods of occlusion, VBOX 3iS utilises the wheel speed data from the vehicle’s CAN bus to significantly reduce any drift.

VBOX 3iSDR builds on the great features of the VBOX 3iS and adds a dual antenna and RTK (Real-Time Kinematic).

Key Features


High Performance GNSS Receiver

The 100 Hz multi-constellation, multi-frequency GNSS engine tracks both the GPS and GLONASS networks of satellites and ensures that data is accurately captured, even in restricted sky view conditions.

Reliable in Poor GNSS Conditions

In GNSS denied environments, such as tunnels and deep urban canyons, VBOX 3iS significantly improves the accuracy of the estimated speed and position data by combining wheel speed information with GNSS and inertial data.

Compatible with Steering Robots

RTK accuracy combined with the IMU makes VBOX 3iSDR a versatile Motion Pack, providing the speed, position and attitude data required to control driving robots and guided soft targets (GST).

Cost-effective ADAS Testing Solutions

VBOX 3iSDR is highly effective for use in multi-target ADAS testing, such as swarm testing, where an accurate data source is essential for each target vehicle but does not require individual logging capabilities.

High-grade IMU

The internal high-grade IMU offers precise measurements of pitch, roll and yaw and helps fill GNSS gaps for short periods of time caused by obstructions such as heavy tree cover or bridges.

Wheel Speed Integration

Wheel speed data from the vehicle’s CAN bus is used to significantly reduce any drift in the data and stabilise the accuracy of speed and position without fitting expensive external wheel speed sensors.

Extremely Versatile

VBOX 3iS is designed to be used with your existing control system or data logger and connects via Serial or CAN.

Compact Solution

The small size of VBOX 3iS makes it ideal for simple installation on target platforms and GST’s where space is at a premium.

Which VBOX 3iS is right for you?

Both variants of VBOX 3iS offer a 100 Hz update rate, use the very latest GNSS technology and include an integrated IMU and wheel speed CAN bus connection. However, you have a choice whether you require the standard VBOX 3iS with single antenna or the VBOX 3iSDR with dual antennas and RTK.

VBOX 3iS

  • 100 Hz GPS/GLONASS receiver
  • Internal Inertial Measurement Unit
  • CAN bus wheel speed data integration
  • Pitch and roll angles with IMU integration
  • ± 1.8 cm Brake stop accuracy
  • RS232/ CAN bus
  • 50 cm position accuracy (using DGNSS)


VBOX 3iSDR

  • 100 Hz GPS/GLONASS receiver
  • Internal Inertial Measurement Unit
  • CAN bus wheel speed data integration
  • Pitch and roll angles with IMU integration
  • ± 1.8 cm Brake stop accuracy
  • RS232/ CAN bus/ Ethernet
  • <1 cm position accuracy with RTK
  • Motion Pack for driving robots & guided soft targets (GST)
  • Dual antenna for slip angle measurement at 5 locations

VBOX 3iS

VBOX 3iS is a highly versatile test solution. It’s high accuracy GNSS receiver combined with internal IMU and integrated wheel speed data from the vehicle’s CAN bus offers precise measurements of pitch, roll and yaw, as well as position and speed, even in areas with poor satellite signal.

The accurate measurement of attitude channels makes VBOX 3iS an ideal solution for a wide range of vehicle dynamics testing including suspension, chassis, and brake testing.

Brake & Tyre Testing

A high-resolution event marker precisely captures the start of tests and brake stops are measured at 100 Hz.

Performance Testing

VBOX 3iS is used by vehicle manufacturers for benchmarking, as well as Coastdown testing and validating a vehicle's performance.


VBOX 3iSDR

Building on the great features of VBOX 3iS, the VBOX 3iSDR model adds dual antennas and RTK (Real-Time Kinematic), making it ideal for ADAS testing, sensor validation, and high-accuracy vehicle dynamics testing. The RTK accuracy combined with the IMU makes VBOX 3iSDR a versatile Motion Pack, providing the speed, position and attitude data required to control driving robots and guided soft targets (GST).

ADAS Testing

It is quick and easy to test several different ADAS applications using VBOX 3iDR, such as Adaptive Cruise Control, Autonomous Emergency Braking, Lane Departure Warning and Park Assist.

Autonomous Vehicle Testing

VBOX 3iDR is ideal for Autonomous Vehicle testing and is compatible with most major steering robot manufacturers, offering highly accurate and repeatable path following.

Handling & Dynamics

The accurate measurement of attitude channels makes VBOX 3iS an ideal solution for vehicle dynamics testing including suspension, chassis, and brake testing. The two antennas add the ability to measure slip angle at five discrete locations.

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This video shows onboard footage from a car equipped with a VBOX 3iS driving through a multi-storey car park. You can see on the real-time graphic overlay that we are able to achieve sub 50 cm accuracy throughout the car park.
This VBOX 3iS product feature was published in the Automotive Testing Magazine International magazine in March 2019. Read the article here.

Technical Specifications

Velocity

Accuracy
0.1 km/h*
Update rate
100 Hz
Maximum velocity
1200 km/h (655 knots)
Minimum velocity
0.1 km/h
Resolution
0.0185 km/h (0.01 knots)
Latency
15.5 ms (fixed)

*Averaged over 4 samples

Velocity

Accuracy
0.1 km/h*
Update rate
100 Hz
Maximum velocity
1200 km/h (655 knots) TBC
Minimum velocity
0.1 km/h
Resolution
0.0185 km/h (0.01 knots) TBC
Latency
20 ms (fixed)

*Averaged over 4 samples

Distance

Accuracy
0.05 % (<50 cm per km)
Update rate
100 Hz
Resolution
0.078 mm TBC

Brake Distance

Accuracy (trigger-activated)
±1.8 cm

Distance

Accuracy
0.05 % (<50 cm per km)
Update rate
100 Hz
Resolution
1 cm

Brake Stop

Accuracy (trigger-activated)
±1.8 cm

Acceleration

Accuracy
0.50%
Maximum
20 g
Update rate
100 Hz
Resolution
0.01 g

Heading

Accuracy
0.1°
Resolution
0.01°

Position (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*
Update rate
100 Hz
Resolution
1.8 mm

*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.

Position (RMS)

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

*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.

Attitude

Roll angle accuracy
0.06° RMS
Pitch angle accuracy
0.06° RMS

Slip Angle Accuracy

0.5 m Antenna Separation
<0.2° rms
1 m Antenna Separation
<0.1° rms
1.5 m Antenna Separation
<0.067° rms
2 m Antenna Separation
<0.05° rms
2.5 m Antenna Separation
<0.04° rms

Gyroscopes

Dynamic range
±450 °/s
Nonlinearity
0.01 % of full scale
Effective Resolution
20 bits (0.00085 °/s)
Bandwidth
50 Hz
Noise density
0.01 °/s/√Hz
Bias stability
0.0028 °/s
Bias stability (ayear)
0.2 °/s

How does it work

GPS Accuracy

How do you derive velocity, distance, position & vehicle body attitudes from GPS? Which factors are crucial in producing accurate measurements for vehicle testing?

Increased Accuracy with RTK

What is Real Time Kinematic (RTK)? How do you increase the accuracy of GPS signals using RTK? What are the limitations?

Measuring Attitude Angles

How do you measure true heading, yaw rate, lateral and longitudinal velocity, slip angle and pitch angle with a twin antenna setup?
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