公开(公告)号：EP1445589A4

公开(公告)日：2005-10-05

申请号：EP02738663

申请日：2002-06-12

申请人： OMATOI NAOYUKI

发明人： OMATOI NAOYUKI

IPC分类号： G01F23/292 ,  G01F23/28

CPC分类号： G01F23/2922 ,  G01F23/2924 ,  G01F23/2925 ,  G01F23/2927

摘要： A liquid level detecting device which can be used for various detection objects and application environments regardless of detection objects, emits light to a liquid level detecting portion efficiently, can detect sensitively variations in quantity of light by a light receiving means, and is excellent in durability, easy to produce and practically applicable, and which comprises a shielding means (14) for preventing light from a light emitting means (12) from directly being applied to a light receiving means (13), and a light scattering means (16) for scattering light from the light emitting means to radiate part of the scattered light to the outside by a liquid level detecting portion above a light radiating means (light transmitting member) (11) and to receive non−radiated and reflected portion of the scattered light by the light receiving means to thereby detect a change in quantity of received light. Accordingly, when liquid (17) is present outside, quantity of light reflected at the interface between the liquid and the light radiating means and returning to the inside of the light radiating means decreases and therefore quantity of received light at the light receiving means decreases also, whereby it is possible to detect a liquid level by measuring a change in quantity of received light.

公开(公告)号：EP1445589A1

公开(公告)日：2004-08-11

申请号：EP02738663.0

申请日：2002-06-12

申请人： Omatoi, Naoyuki

发明人： Omatoi, Naoyuki

IPC分类号： G01F23/28

CPC分类号： G01F23/2922 ,  G01F23/2924 ,  G01F23/2925 ,  G01F23/2927

摘要： The present invention aims at attaining a liquid surface level detecting apparatus, which can be used in various detection targets and usage environments without selecting a detection target, can efficiently irradiate a light to a liquid surface level detecting unit and detect a variation in a light reception amount of a light receiving means at a high sensibility, and can be excellent in durability, easy to manufacture, and be actually used. By placing a light shielding means 14 so as not to directly irradiate the light from a light emitting means 12 to a light receiving means 13, the light from the light emitting means is scattered by an optically scattering means 16, and a part of that scattering light is radiated to an outside by the liquid surface level detecting unit on a light radiating means (an optically transmitting member) 11. On the other hand, the scattering light, which is reflected without being radiated, is received by the light receiving means, and the change in that light reception amount is detected. Consequently, if a liquid 17 exists in the outside, a light amount, which is reflected by a boundary between the liquid and the light radiating means and returned to an inside of the light radiating means, is reduced, and the light reception amount in the light receiving means is also reduced. Thus, by measuring the change in the light reception amount, it is possible to detect a liquid surface level of the liquid.

摘要翻译： 本发明的目的在于获得能够在各种检测目标和使用环境中使用的液面检测装置，而不选择检测目标，可以有效地将光照射到液面检测单元并检测光接收的变化 光接收装置的高灵敏度的量，并且可以具有优异的耐久性，易于制造和实际使用。 通过设置遮光装置14以便不将来自发光装置12的光直接照射到光接收装置13，来自发光装置的光被光学散射装置16散射，并且其中的一部分散射 光通过液体表面电平检测单元在光辐射装置（光学传递构件）11上被辐射到外部。另一方面，被辐射反射的散射光被光接收装置接收， 并检测该光接收量的变化。 因此，如果液体17存在于外部，则由液体和光辐射装置之间的边界反射并返回到光辐射装置的内部的光量减少，并且光接收量 光接收装置也减少了。 因此，通过测量光接收量的变化，可以检测液体的液面。