| 摘要 |
PURPOSE:To improve the hysteresis of a pressure sensor, by providing two pressure-sensitive elements which are arranged into a slab shape with different characteristics to each other and distributing these pressure-sensitive elements concentrically by fitting a pressure-sensitive element into the hole provided to the other element. CONSTITUTION:Pressure-sensitive elements 11 and 12 comprise the conductive fibers such as the carbon fibers, etc. which are arranged into a flat plate shape so that the state of contact is varied among the fibers by the applied pressure and the resistance value is varied in relation to the change of the contact resistance and the current route. The element 11 is fitted into a circular hole 13 of the element 12, and these elements 11 and 12 are set concentrically to be stored into a casing 15 along with a pressure plate 14. The elements 11 and 12 are then held between a support plate 16 at the bottom of the casing 15 and the plate 14. In such constitution, no difference of output is virtually caused between the elements 11 and 12 to the same level of pressure. Thus the hysteresis is improved greatly for a pressure sensor. |
