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Hand-arm vibration measurement by laser vibrometry aimed at product development and optimization

Objective

Goal of the DOPTEST Project (its scientific/technical activity divided into 3 work-packages covering a period of 3 years) consisted on developing a new test procedure aimed at measuring vibration levels on the machine surface and on the operator's hand. That in order to quantify, on the one hand, the "vibratory quality" of the machine, tool or component and, on the other hand, evaluate the vibration transmission/absorption by the operator from the ergonomic point of view.
All the scheduled/foreseen Project results have been satisfactorily achieved in the due time.

In particular:
a) the applicability/reliability of the measurement procedure positively confirmed;
b) the vibration behaviour of industrial products/components, i.e. hand held machines, hand guided tools/agricultural machines, earth-moving machines control levers/steering wheels, analysed and evaluated as far as the vibration transmission/absorption mechanisms to the operator's hand are concerned;
c) the performance of vibration insulation devices, systems, materials and components applied to hydraulic breakers checked (supporting their development phase) by means of the measurement procedure.
The research program has been carried out as a parallel development of:
a) the no-contact laser technique applied in order to measure vibrations on the machine under test and on the operator's body;
b) capacitive sensor matrixes based on polymeric films in order to measure dynamic contact pressure and force distributions at the man-machine interface.

The measurement procedure has been applied on different test cases:

a) hydraulic breakers;
b) hand guided agricultural machines;
c) components of earth-moving machines.

Call for proposal

Data not available

Coordinator

Consiglio Nazionale delle Ricerche (CNR)
EU contribution
No data
Address
Via Canal Bianco 28
44044 Cassana Ferrara
Italy

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Total cost
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Participants (3)