Keywords
Citation
(1998), "Accelerometers", Sensor Review, Vol. 18 No. 2. https://doi.org/10.1108/sr.1998.08718baf.003
Publisher
:Emerald Group Publishing Limited
Copyright © 1998, MCB UP Limited
Accelerometers
Accelerometers
Keywords Humphrey, Temperature sensors
Humphrey's patented technology features a heat transfer-based design with no moving parts, utilising resistance temperature detectors (RTD) as acceleration sensing elements. The change in natural convection around the sensor elements due to acceleration provides a stable and repeatable means to measure low g acceleration over a wide temperature range. The sensor elements are low resistance and therefore offer lower noise susceptibility than capacitive, piezo-resistive or piezo-electric technologies. The sensor provides 0-4Hz frequency response and inclinometry performance through 360°, unlike slower, slosh-prone fluidic tilt sensors.
Sensor excitation and signal conditioning can be accomplished using low cost circuits. The sensor elements can easily be configured into bridge excitation circuits allowing the use of simple analog and digital compensation techniques to enhance accuracy. Sensitivity, zero g and non-linearity can be compensated owing to the predictable behaviour of the sensor.
The sensors are manufactured utilising automated equipment. Robotic sensor assembly provides product uniformity, the economy of batch processing and statistical product control methods.
The LA01 and LA02 accelerometers are available in metal hermetic T08 packages. Operating temperature range is specified from -40° to +85°C. Electronic compensation can extend frequency response to 30Hz.
Features
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Patented heat transfer based design.
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30 micro g noise level.
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Single and bi-axial models in T08 package.
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Automated production capability.
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4,000g shock survival.
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360° inclinometry range.
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0-4Hz frequency response.
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Low cost, accurate inclination sensing.
Applications
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Industrial equipment monitoring.
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Automotive body and chassis control.
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Inertial sensing of velocity and position.
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Computer interface devices, video games.
For further information contact: EuroSensor, Computer Controls Ltd, 20-24 Kirby Street, London EC1N 8TS, UK. Tel: +44 (0) 171-405 6060; Telex: +44 (0) 24504; Fax: +44 (0) 171 405 2040.