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VBOX Inertial Measurement Unit

Racelogic's Inertial Measurement Unit (RLVBIMU04) provides highly accurate measurements of pitch, roll, and yaw rate using three rate gyros, as well as x, y, z acceleration via three accelerometers. The CAN based unit is temperature compensated and has improved calibration and stability.

The RLVBIMU04 is designed for use either as a standalone sensor with simple connection and configuration via the CAN bus interface, or for use with VBOX GPS data loggers.

When used in conjunction with VBOX 3i, data from the IMU can be seamlessly integrated with GPS to produce pitch and roll angle accurate to 0.1˚ (RMS) as well as smoother velocity data. This ensures GPS data even when satellite reception is interrupted.

The IMU is constructed with a splash proof casing, which is rated to a limited ingress IP rating of IP67, making it ideal for use on boats or in harsh environments, as well as automotive testing.

Using synchronous 16bit sampling for each of the internal sensors provides a high degree of accuracy, with yaw rate resolution typically 0.014 degrees per second and acceleration resolution down to 0.15 mg.

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VBOX Analogue Input Module (16bit)

The VBOX Analogue Input Module (RLVBADC03) is an 8-channel 16bit analogue voltage interface designed for use with the Racelogic VBOX range of GPS data loggers.

Each channel is electrically isolated and provides bipolar voltage measurement up to ±50v with a DC accuracy of 400*V. Isolated, regulated 5v and 12v supplies are available on the main 25-way sub-d connector in addition to a supply voltage connection.

Configuration software supplied with the Analogue Input Module allows scale and offset of the voltage reading for conversion into real data.

Connection is via the VBOX CAN bus, which means the modules can be placed very close to the sensors. This technique reduces noise compared with having long analogue signal cables running from the sensors to a main logging system.

CAN connectivity also means you can have multiple modules daisy chained around the vehicle, all sharing the same Bus.

Each individual analogue channel can be separately configured for Units, Scale and Offset using the VBOX Tools Software. These values are stored inside the input module, which then transmits "real" values on the CAN bus to the VBOX. This means that VBOX Tools and the Multifunction Display can show these values in real-time.

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VBOX Frequency & Pulse Counter Input Module

Racelogic's Frequency Input Module (RLVBFIM03) is a 4-channel frequency capture and pulse counter unit. It enables frequency based signals in the range of 1Hz to 20kHz to be recorded or logged by a VBOX.

The input circuit for each channel can accept a wide signal amplitude range from TTL output sensors up to the higher voltages created by inductive sensors.

This means that direct connection to ABS wheel speed sensors, RPM sensors or fuel flow sensors is possible. A dedicated fuel flow mode makes the monitoring of fuel consumption and flow rate very easy to set up and use.

The RLVBFIM03 can be configured through software to process the input frequency or pulse data to provide logged data in real units. By configuration of each channel the incoming frequency or pulse train can be easily configured into any of the following data formats:

  • Frequency (Hz)
  • RPM
  • Speed Km/h
  • Speed Mph
  • Pulse Count
  • Fuel Used (Lt/Gal)
  • Fuel Flow Rate (Lt/Hr-Gal/Hr)
  • Fuel Consumption (Lt/100Km)
  • Fuel Consumption (Km/Lt – MPG)
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    VBOX Mini Input Module

    The Mini Input Module (RLVBMIM01) is a general purpose input/output module designed for use by either the VBOX Mini or existing VBOX products.

    The Mini Input Module allows data such as temperature, RPM, wheel speed, fuel flow, throttle angles and pedal forces to be easily measured along with the VBOX GPS data.

    The module can accept 8 analogue inputs, 2 digital inputs, an additional digital state input for use as an event marker, and 2 K-type thermocouple inputs.

    When used in conjunction with a VBOX Mini, the Mini Input Module can also output one digital and one analogue signal. Connections are via a removable screw terminal.

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    VBOX Thermocouple Interface

    The VBOX Thermocouple Interface takes 8 thermocouple inputs and converts them to CAN. It is primarily designed to connect to a VBOX GPS data logger and allows the user to log thermocouple data along with the normal channels of VBOX data.

    The range of the Thermocouple Interface is -100 to +1200 °C, and a 24 bit A-D is used for conversion.

    ACS002 K-type-Thermocouple-Interface-BlockThere is an option for a K-Type extension block (RLVBACS002) which utilises a sophisticated cold junction compensation module to ensure 0.1°C accuracy even during a fast transient environmental temperature change.

    This is especially useful in automotive testing, as temperatures in the engine bay or cabin can change rapidly through 40 degrees or more in the period of a few minutes.

    Conventional cold junction compensation does not track evenly across all cold junctions through such a dynamic change, and result in errors of 5 to 10 degrees. The extension block supplied with the VBOX Thermocouple module retains an even temperature across all 8 cold junctions and reference by using a specially machined CNC block which houses the cold junctions, in very close proximity, and encases them in thermocouple grease. This ensures that the accuracies of the readings are unsurpassed in such an environment.

    The Thermocouple Interface is available in a 12v or 24v power supply version.

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    VBOX Vehicle CAN Interface

    The VBOX Vehicle CAN Interface is a CAN gateway which translates from one CAN Bus into another. The unit is designed to recognise 16 different variables being transmitted on a CAN bus, and then re-transmits them in a form that the VBOX can log along with the normal VBOX channels.

    The CAN Interface can be programmed to read almost any format in a CAN message, and then assign a name, multiplier, and offset. This information is then re-transmitted onto the VBOX CAN bus and is recorded at 20Hz to the compact flash card.

    Transfer of VBOX data to the vehicle bus is blocked to prevent unnecessary Bus loading.

    Racelogic can also supply CAN sets for a number of manufacturers, allowing various parameters to be logged. For an application list please see our CAN Database.

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