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RACELOGIC Support Centre

11 - Speed Sensor (VBSSxx) Technical Specification

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Specifications

Velocity

  5 Hz 10 Hz 20 Hz 100 Hz
Accuracy 0.1 km/h 0.1 km/h 0.1 km/h 0.1 km/h
Units km/h, mph, kts km/h, mph, kts km/h, mph, kts km/h, kph, kts
Update rate 5 Hz 10 Hz 20 Hz 100 Hz
Maximum Velocity 1000 mph 1000 mph 1000 mph 1000 mph
Minimum Velocity 0.01 km/h 0.01 km/h 0.01 km/h 0.01 km/h
Resolution 0.01 km/h 0.01 km/h 0.01 km/h 0.01 km/h
Latency >160 ms 41.5 ms 41.5 ms 6.75 ms

Distance

  5 Hz 10 Hz 20 Hz 100 Hz
Accuracy 0.05 % (<50 cm per km) 0.05 % (<50 cm per km) 0.05 % (<50 cm per km) 0.05 % (<50 cm per km)
Units m / ft m / ft m / ft m / ft
Update rate 5 Hz 10 Hz 20 Hz 100 Hz
Resolution 1 cm 1 cm 1 cm 1 cm

Absolute Positioning

  5 Hz 10 Hz 20 Hz 100 Hz
Accuracy 3 m* 3 m* 3 m* 3 m*

Accuracy with SBAS DGPS

- Europe (EGNOS)

<1 m* <1 m* <1 m* <1 m*

Accuracy with SBAS DGPS

- USA (WAAS) / ASIA (MSAS)

<1.8 m* <1.8 m* <1.8 m* <1.8 m*
Accuracy with BaseStation RTCM DGPS N/A 40 cm* 40 cm* 80 cm*

Accuracy with BaseStation DGPS + GPS upgrade (RLVBUP30)

N/A 20 cm* 20 cm* N/A
Update rate 5 Hz 10 Hz 20 Hz 100 Hz
Resolution 1.8 cm 1.8 cm 1.8 cm 1.8 cm
Height accuracy 10 m* 6 m* 6 m* 6 m*
Height accuracy with DGPS N/A 2 m* 2 m* 2 m*
 

Time

  5 Hz 10 Hz 20 Hz 100 Hz

 Accuracy

- Lap Timing (OLED) 

0.01 s** 0.01 s** 0.01 s** 0.01 s**

Accuracy

Accel / Brake Test (MFD)

0.2 s 0.05 s 0.05 s 0.01 s
Resolution 0.01 s 0.01 s 0.01 s 0.01 s

Heading

  5 Hz 10 Hz 20 Hz 100 Hz
Resolution 0.01° 0.01° 0.01° 0.01°
Accuracy 0.1° 0.1° 0.1° 0.1°

Acceleration

  5 Hz 10 Hz 20 Hz 100 Hz
Accuracy 1.00 % 0.50 % 0.50 % 0.50 %
Maximum 4 g 20 g 20 g 20 g
Resolution 0.01 g 0.01 g 0.01 g 0.01 g

Brake stop Accuracy (Trigger Activated)

  5 Hz 10 Hz 20 Hz 100 Hz
Accuracy N/A ±20 cm*** ±10 cm*** ±1.8 cm***

Physical

  5 Hz 10 Hz 20 Hz 100 Hz
Weight 190 g 250 g 250 g 250 g
Operating temp -30˚C to +70˚C -30˚C to +70˚C -30˚C to +70˚C -30˚C to +70˚C
Storage temp -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C
Size 90 mm x 65 mm x 31.85 mm 90 mm x 65 mm x 31.85 mm 90 mm x 65 mm x 31.85 mm 140 mm x 92 mm x 31.85 mm
Connectors Deutsch ASDD Autosport  Deutsch ASDD Autosport  Deutsch ASDD Autosport  Deutsch ASDD Autosport 
IP rating IP66 IP66 IP66 IP66

 

Definitions

* Circle of Error Probable (CEP): 95 % of the time the position readings will fall within a circle of the stated diameter

** Not using DGPS and crossing the start/finish line at 100 km/h

*** Based on <50 m brake stop distance
 

 

CAN Output

Output Data Rate 125 kbit/s, 250 kbit/s, 500 kbit/s and 1 Mbit/s selectable baud rate. Software controlled CAN termination.
Data available  Position, vehicle speed, heading, lateral acceleration, longitudinal acceleration, satellite count, time, radius of turn, altitude, Distance from Trigger, Trigger Time, Trigger Velocity, True Heading. 

 

RS232 Output

Output Data Rate Dependent on unit type and mode
Data available  NMEA* and RL Serial, dependent on unit type (* NMEA output not available on 5 Hz unit)

 

Analogue

Output data rate 0 – 5 V DC
Data available Either Speed, Lateral Acceleration, Longitudinal Acceleration, or Lap Beacon

 

Digital

Output data rate Low = 0 V, High = 5 V, Max. frequency 4.4 kHz
Data available Speed or Lap Beacon 

 

Inputs

Input Voltage range 7 – 30 V DC
Power 3.7 W Max (except 5 Hz option: 2 W Max)
GPS Antenna 3 V Active Antenna (inc) / 5 V for 100 Hz version
Digital Input Set Lap beacon Position / Brake Trigger Event
LED Power, Satellite Count,  Event Out

Dimensions

5 Hz, 10 Hz, 20 Hz and 100 Hz (V1)

 Speed Sensor Dimensions.PNG
5 Hz, 10 Hz, 20 Hz and 100 Hz (V1) Speed Sensor

100 Hz (V2)

Speed Sensor Dimensions Single Antenna V2.png
100 Hz Speed Sensor (V2)

100 Hz (V3/4)

Speed Sensor Dimensions Single Antenna V34.png
100 Hz Speed Sensor (V3 and V4)