When the vibration exposure of the driver of a machine
powered garden vehicle is measured, the results are
greatly influenced by a number of parameters, the most
important of which are the operating conditions of the
machine (operator, grip place and force etc.).
The important parameters are: operating conditions,
mounting of the transducer, mounting method of the
transducer and, grip force of the driver.
The draft proposal was amended several times and its
applicability was tested in the autumn 1986. In the Round
Robin Test a grouted mill Norlett 4000 was measured in
the Nordic countries by using an adapter of an
acceleration transducer, which was built up by
Occupational Safety Engineering Laboratory. The
measurements were performed once in Norway, Denmark and
Sweden and twice in Finland.
The weighted vibration level was measured as a function
of the speed of rotation. The vibration levels varied
between 115...130 dB. In the travelling direction the
most significant deviation in the measuring results was
6,0 dB at the speed of rotation 3000 1/min, in the side
direction 4,0 dB at 2900 1/min and in the vertical
direction 4,4 dB at 2700 1/min.
Although a large number of uncontrolled parameters is
associated with the measuring situation, the results
strongly indicate that a reproducibility better that +5
dB can normally be expected.
|Place of Publication||Espoo|
|Publisher||VTT Technical Research Centre of Finland|
|Number of pages||52|
|Publication status||Published - 1990|
|MoE publication type||Not Eligible|
|Series||Valtion teknillinen tutkimuskeskus. Tiedotteita|
- measuring methods
- drivers of machines
- agricultural machinery