Patent ID: 7486987
Filing Date: 2009-02-03
Classification: A61B

Abstract:
1. A work comfort evaluating device for evaluating a level of comfort of work by measuring myoelectric potentials of muscles when the work is done by antagonistic activities of said muscles, said work comfort evaluating device comprising: a pair of detecting sensors for sensing myoelectric potentials generated through muscular activities of a human body at a time of work of said muscles; an amplifier for amplifying said myoelectric potentials sensed by said detecting sensors; a signal processing part for calculating a synchronous contraction intensity of said muscles by using myoelectric potential waveforms of said amplified myoelectric potentials, wherein the signal processing part is configured to calculate a geometrical average of said myoelectric potential waveforms of said muscles, and is further configured to calculate the root mean square values of the calculated geometrical average within a predetermined period, and wherein the device is configured to use the calculated root mean square values as the synchronous contraction intensity; a work load intensity calculating part for calculating a level of a work load intensity in said work imparting load to said muscles, said device configured to calculate the level of said work load intensity together with calculating said synchronous contraction intensity; and an evaluation part for evaluating a level of comfort of said work by normalizing said synchronous contraction intensity by dividing the synchronous contraction intensity by the calculated level of said work load intensity, wherein said work load intensity calculating part is configured to calculate the level of the work load intensity from the myoelectric potential waveforms of said muscles.