Using NI LabVIEW with NI data acquisition and vision products to acquire video of an existing data collection and analysis system.
Lowe-BD; Kong-Y-K; Han-J
Austin, TX: National Instruments Corporation, 2007 Mar; :Webpage
Ergonomic assessments of hand-intensive work involve characterizing the posture, repetitive motions, and hand force the worker is required to exert. Posture and repetitive motions are, at a gross level, visually observable. However, the hand force exertion is more reliably assessed with direct measurement. Our group uses thin profile resistive force sensors to measure hand grip contact force on tools and workpieces grasped by workers. We place these sensors at the primary grip contact points of the hand, namely on the finger and thumb segments. The sensors are attached to a thin leather athletic grip glove that fits snugly on the hand of the worker. These athletic gloves are available in a wide range of sizes to accommodate variations in hand dimensions. Our new system uses NI LabVIEW and NI DAQPad-6015 devices to acquire voltage data from these sensors. We are currently using 20 force sensors on the glove, which requires two DAQPad-6015 devices and a standard USB hub. (A modified 16-sensor version of the force measurement system could be employed that would require only a single DAQPad-6015 device.) We have constructed our own power supply, excitation, and amplification for these sensors that interface through the mass termination cable of the DAQPad devices.
Analytical-processes; Analytical-instruments; Ergonomics; Muscle-function
Brian D. Lowe, Ph.D., CPE, National Institute for Occupational Safety and Health. 4676 Columbia Parkway, MS C-24, Cincinnati, OH 45226 USA
Austin, TX: National Instruments Corporation