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1. 发明授权

US4754264A Water content detecting device for diaper 失效
标题翻译：尿布含水检测装置
公开(公告)号：US4754264A
公开(公告)日：1988-06-28
申请号：US867501
申请日：1986-05-28
申请人： Shigeru Okada , Katsutoshi Rokuta , Toshio Ikegawa
发明人： Shigeru Okada , Katsutoshi Rokuta , Toshio Ikegawa
IPC分类号： A61F5/48 , A61F13/42 , G01N27/22 , G08B21/00
CPC分类号： G01N27/223 , A61F13/42 , A61F5/48
摘要： A water content detecting device for any type of diaper such as a cloth made reusable diaper, a paper made disposable diaper, or the like includes a sensing unit for sensing the degree of wetness of the diaper and an informing unit for transmitting the information representing the degree of wetness to a nursing person at a remote place. The sensing unit is detachably interposed in the diaper to be detected. The sensing unit is composed of a water impermeable upper sheet, a water permeable lower sheet, and a pair of metal layers placed between the upper sheet and the lower sheet and extending in the longitudinal direction of the sheets in parallel. One of the metal layers is covered with an electrical insulating layer. The informing unit is connected to the sensing unit through a pair of leads, and composed of a water content detecting circuit for detecting the change of electrostatic capacitance between the two metal layers of the sensing unit, a wave form shaping circuit, and an oscillating circuit. This water content detecting circuit mainly consists of an astable multivibrator which uses the two metal layers of the sensing unit as its feedback capacitor.
摘要翻译：用于任何类型的尿布的含水量检测装置，例如制成可重复使用的尿布的纸，一次性尿布等，包括用于感测尿布的湿度的感测单元和用于传送代表该尿布的信息的通知单元在偏远地方的护理人员的湿度。感测单元可拆卸地插入待检测的尿布中。感测单元由不透水的上片，可透水的下片和放置在上片和下片之间的一对金属层组成，并且在片的纵向方向上平行延伸。金属层之一被电绝缘层覆盖。通知单元通过一对引线连接到感测单元，并且由用于检测感测单元的两个金属层之间的静电电容变化的水含量检测电路，波形整形电路和振荡电路。该含水量检测电路主要由使用感应单元的两个金属层作为其反馈电容器的不稳定的多谐振荡器组成。

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