PIMEX--an instructive way to study vibration exposure and work posture

Area of Science:

• Occupational Health and Safety
• Ergonomics
• Vibration Measurement Technology

Background:

• Hand-arm vibration is a significant occupational hazard.
• Assessing vibration exposure accurately is crucial for worker protection.
• Existing methods may not fully capture the dynamics of exposure during work tasks.

Purpose of the Study:

• To introduce and evaluate the PIMEX-method (PIcture-Mix-EXposure) for measuring physical exposures.
• To apply the PIMEX-method to assess vibration exposure from hand-held grinders.
• To explore the relationship between vibration, work technique, and different grinder models.

Main Methods:

• The PIMEX-method integrates direct-reading instrument signals with video recordings.
• Miniaturized accelerometers (Brüel and Kjaer 4374) and a vibration meter (2513) were used.
• Vibrations were measured at grinder handles during operation (work and idle) and worker posture was evaluated.

Main Results:

• The PIMEX-method successfully visualized vibration exposure in real-time.
• Measurements were taken on various hand-held grinders under different working conditions.
• Preliminary findings suggest a correlation between vibration exposure, work technique, and grinder type.

Conclusions:

• The PIMEX-method offers a promising approach for assessing complex occupational exposures.
• This method aids in understanding the interplay of tools, tasks, and worker posture on exposure.
• Further application of PIMEX can inform strategies for reducing hand-arm vibration exposure.