The Effects of Mobile Computer Location in a Vehicle Cab on Muscle Activity and Body Posture of Large and Small Drivers

摘要

The objective of this research is to determine the best location to place a conventional mobile PCsupported by a commercially available mount in a vehicle cab for small and large body sizes.Many North American electric utility companies and sales agencies are in the process ofintegrating mobile computers into their fleet vehicle cabs. Four locations of mobile computers ina light truck cab were tested in a laboratory study to determine how driver body size andcomputer location affected muscle activity of the lower back and shoulders and joint angles of theshoulders, elbows, and wrists of small and large drivers. Driver size had a negligible effect onbiomechanical loading. Regardless of driver size, placing the mobile computer closer to thesteering wheel reduced low back and shoulder muscle activity required to use the mobilecomputer, and joint angles were also closer to neutral. Also locating the mobile computer close tothe steering wheel reduces risk factors of injuries such as low back pain and shoulder tendonitis.A recommendation for the initial location along with adjustments to locate the mobile computerwith respect to the steering wheel is included.