Vibration measuring dosimeter for e.g. lorry or tractor, has concave side for contact with spine and uses accelerometer as vibration sensor

摘要

The contact part of the dosimeter (1) is formed by the partially concave underside of the dosimeter casing and is intended for contact with the spine of the vehicle driver. The contact part includes a fastener for a belt extending around the driver's upper body. The vibration sensor comprises a 3-axis accelerometer. The dosimeter includes a processor for calculating an RMS (Root Mean Square) value and frequency value within the range of 0.5-80 Hz for each incident of the whole body vibrating. The dosimeter is flat and includes a display (2) and digital memory for storing vibration data.