Accelerometer - 1 Axis

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1 Axis

The sensing element is a MEMs device based on the principle of differential capacitance technology. The single axis part is particularly small and suitable for wheel hub acceleration measurement.

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Application notes

The unit is based on micro machined MEMS technology. The unit contains a ±35g sensing element. The element is scaled to optimise the resolution to suit the g range of interest. An internal amplifier provides an output between 0 and 5 volts. The on board microcontroller and temperature sensor are used for offset drift compensation. This unit can be re-calibrated at the factory.

For higher g applications a ±50g sensing element can be fitted and scaled to optimise the resolution.

Electrical

  • Supply Voltage 8 to 16V unregulated
  • Range ±20g
  • Output voltage at 25°C
  • 0.5 ±0.10VFull scale negative
    2.5 ±0.05V0g
    4.5 ±0.10VFull scale positive
      • Sensitivity 100mV/g ± 2.5% max at 25°C
      • Cross axis sensitivity ±3.5%
      • Thermal sensitivity drift

  • +0.003 to +0.006%/°C over -20°C to 25°C

    -0.007 to -0.017%/°C over 25°C to +105°C

    -0.004 to -0.025%/°C over 105°C to +125°C

      • Zero g drift ±0.2g max over operating temperature range
      • Frequency response

    • -3dB at 60±5Hz, 2 pole filter

      • Output impedance 50Ω
      • Current Consumption <10mA

Cable and Connection Definition

  • 24AWG un-screened cable
  • Cable length 1000mm
  • Connection
  • Red wire
    		Supply
    Green wire
    		Ground
    White wire
    		Signal

Mechanical

  • Weight less than 65g (including cable)
  • Polyester cable boss for strain relief to the sensor body
  • Over range 500g (any axis powered for 0.5ms)

Environmental

  • 6AL4V Titanium body and lid
  • Resistant to standard motorsport fluids
  • Maximum humidity 100%
  • Operating temperature 0 to +125°C
  • Viton jacketed cable

Ordercodes

O 030 345 006 015
Accelerometer - 1 Axis