Development and evaluation of attachable anti-vibration handle

Area of Science:

• Agricultural Engineering
• Occupational Health and Safety
• Ergonomics

Background:

• Global blueberry production has surged, increasing reliance on mechanical hand harvesters.
• These harvesters, while efficient, generate high levels of Hand Arm Vibration (HAV), posing risks like Hand Arm Vibration Syndrome (HAVS) to operators.
• Existing harvesting methods necessitate ergonomic improvements to mitigate worker exposure to HAV.

Purpose of the Study:

• To develop and evaluate a novel spring-based anti-vibration handle for vibrating equipment.
• To assess the effectiveness of the proposed handle in reducing Hand Arm Vibration (HAV) exposure during blueberry harvesting.
• To analyze the impact of the anti-vibration handle on worker comfort and biomechanics.

Main Methods:

• A spring-based anti-vibration handle was designed and attached to a blueberry hand harvester.
• Measurements were taken for hand arm vibration (HAV), wrist posture, muscle activity, and subjective discomfort.
• Comparative analysis was performed between the modified harvester and standard equipment.

Main Results:

• The developed spring-based handle demonstrated a significant reduction in HAV by 61.1%.
• This reduction brings the vibration exposure within the European Union's Exposure Limit Values (ELV).
• Further analysis indicated positive effects on wrist posture and muscle activity, alongside reduced subjective discomfort.

Conclusions:

• The spring-based anti-vibration handle is an effective solution for mitigating HAV in blueberry harvesting.
• This innovation offers a viable method to enhance worker safety and reduce the risk of Hand Arm Vibration Syndrome (HAVS).
• The findings support the adoption of ergonomic interventions in agricultural machinery to improve occupational health.