| 摘要 |
<p>PURPOSE:To simply set operational pressure, and distinguish a person from a substance other than the person as required by forming a pressure sensitive resistant element in sheet-state, composing a pressure sensitive conductive sheet with electrodes stuck on both surfaces of the pressure sensitive resistant element, and incorporating the pressure sensitive conductive sheet into the whole of a seating position. CONSTITUTION:A sheet-state pressure sensitive resistant element 11 is provided on one side electrode 10 surface, upper and lower electrodes 10 and 10 are piled up so as to face each other, and a pressure sensitive conductive sheet 8 whose both end parts are stuck with an adhesive 12 is incorporated within a seat. When a person is seated, a resistant value of the pressure sensitive sheet lowers to a given value or below, and when a person and a substance other than the person are distinguished from each other the pressure sensitive conductive sheet 8 is divided into several pieces to be incorporated, comparison with the last time value is made after constant period, and when a value varies, the above distinction can be made since variation hardly occurs, even a person is seated because he is also a kind of substance. By the way, setting or working pressure can be easily made by the adjustment of a variable resistance 16 of a drive circuit. this enables working pressure to be easily set, and distinction of a person from substance to be easily made.</p> |
