A simple apparatus using inclinometer for monitoring working postures

Area of Science:

• Occupational health
• Ergonomics
• Biomechanics

Background:

• Assessing low back load from working postures is crucial for preventing injuries.
• Existing methods for measuring working postures can be cumbersome or inaccurate.

Purpose of the Study:

• To develop and validate a novel apparatus for evaluating low back load by measuring upper body inclination.
• To analyze the relationship between working posture, task parameters, and low back load.

Main Methods:

• Development of a portable apparatus using an inclinometer (magnetic resistance sensor) and a CPU-controlled portable unit.
• Data collection during model work (material handling) and a practical application (diaper changing).
• Analysis of upper body inclination data in relation to workplace height and lifting techniques (stooped vs. squat).

Main Results:

• Theoretical analysis indicated a significant change in upper body inclination with workplace height.
• In model material handling, upper body inclination decreased with lift distance in stooped lifting.
• In diaper changing, mean upper body inclination decreased as bed height increased.

Conclusions:

• The developed apparatus effectively measures upper body inclination for assessing low back load.
• Workplace height is a significant factor influencing working postures and potentially low back load.
• Findings suggest ergonomic interventions should consider optimizing workplace height to reduce strain.