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Abstract
A study was conducted to develop a force sensor made of piezoresistive conductive film and to assess the feasibility of detecting inappropriate sitting postures using the force sensor platform. The force sensor was designed with multiple layers and includes a conductive foil and an insulation cover. The sensor delivers voltage output according to its power-law characteristics in response to a change in the applied force. The distribution of pressure was measured for three postures—upright, forward leaning, and backward leaning—using a three-by-three sensor array attached to a chair. The results indicate that the ratio of the average pressure distribution on the front row to that on the rear row of the sensor array exhibits a significant variation.
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