• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Optical device for measuring moisture in a substrate, in which device water is conveyed from the substrate along a porous absorption part (5) on a surface (4) of a prism so that it causes the critical angle of the total reflection to be changed thereon as a result of the change of the index of refraction. Another surface of the prism is dyed or patterned and covered in such a manner that it becomes visible only through reflection from the surface (4) when the surface is dry. When the surface (4) is moist, only the absorption part is visible through the viewing surface. The invention is advantageous in that due to the application of the principle of total reflection the change from an indication of the presence of moisture to an indication of the absence of moisture takes place sharply, not gradually.
    公开号:SU1718737A3
    申请号:SU884355831
    申请日:1988-05-27
    公开日:1992-03-07
    发明作者:Аласаарела Эско
    申请人:Мойстик Ой (Фирма)；
    IPC主号:
    专利说明:

    2
    4
    权利要求:
    Claims (2)
    [1]
    Claim
    1. An optical device for measuring the moisture content of a porous substance, comprising a housing and an optical prism of total internal reflection placed in it, one of the faces of which is an observation surface and is located in the viewing window of the housing, characterized in that, in order to increase accuracy, it additionally an absorber is introduced, having two sections and made in the form of a tape, and a reflector made of a material contrasting in color with the material of the absorber, and the body is equipped with two openings located on the opposite bying its ends, wherein the first hole is formed at the location of the first portion of the absorber, the second portion of the absorber and the reflector are arranged in contact with the second and third prism faces, respectively the second face of the prism is reflective.
    3. The device according to claim 2, characterized in that the prisms are made of acrylic with a refractive index of 1.49, the angles between the faces of the prisms are 6.42 and 132 °, and the angle between the normals. To the observation surfaces of the prisms is 9 ° .
    [2]
    2. The device according to claim 1, with the exception that I additionally introduced into it. the second Prism, similar to the first, on the corresponding faces of which a reflector and an absorber are located, while both 5 prisms are rigidly connected and are located symmetrically, and their observation surfaces are installed in contact.
    ΊΟ
    V
    Figure 1
    类似技术:
    公开号 | 公开日 | 专利标题
    KR900700901A|1990-08-17|Optical sensors for ice formation and other chemical species detection
    FI65496C|1984-05-10|MAETFOENSTER FOER PROCESSREFRAKTOMETER
    SU1718737A3|1992-03-07|Optical device for measurement of porous substance humidity
    US4624570A|1986-11-25|Fiber optic displacement sensor
    US5309288A|1994-05-03|Prismatic device for use with process refractometers
    JPS63132139A|1988-06-04|Liquid refractive index meter
    JPS61221629A|1986-10-02|Pressure sensitive element
    KR920701787A|1992-08-12|Remote sensing system of physical quantity operated by reflex action
    US2474044A|1949-06-21|Prism system for refractometer of the abbe type
    JPS59145977A|1984-08-21|Magnetic field measuring device
    JPS63311147A|1988-12-19|Optical fiber type humidity sensor
    SU565236A1|1977-07-15|Hygrometer
    JPH01131435A|1989-05-24|Measuring instrument for property value of liquid
    SU642665A1|1979-01-15|Hygrometer
    JPH03287050A|1991-12-17|Optical refractive index measuring instrument
    JPS57194324A|1982-11-29|Optical temperature measuring device
    JPH01295137A|1989-11-28|Refractive index measuring sensor
    SU1024808A1|1983-06-23|Hygrometer
    SU1755045A1|1992-08-15|Angular position guide sensor
    SU1096545A1|1984-06-07|Liquid kind indicator
    JPS62133335A|1987-06-16|Leak detector
    SU1467372A1|1989-03-23|Internal dial gauge for measuring cross sizes of slots or holes
    SU1397726A1|1988-05-23|Device for determining actual square of article contact
    JPS6050422A|1985-03-20|Liquid detecting sensor
    RU93020136A|1995-07-20|DEVICE FOR MEASURING THE INTENSITY OF MULTIPLE LIGHT
    同族专利:
    公开号 | 公开日
    FI78564C|1989-08-10|
    US4846572A|1989-07-11|
    EP0324733B1|1991-10-09|
    DK290888D0|1988-05-27|
    EP0324733A1|1989-07-26|
    JPH0820362B2|1996-03-04|
    DE3773681D1|1991-11-14|
    AT68265T|1991-10-15|
    NO176374B|1994-12-12|
    FI863947A0|1986-09-30|
    NO882190L|1988-05-19|
    NO176374C|1995-03-22|
    JPS6390742A|1988-04-21|
    NO882190D0|1988-05-19|
    DK290888A|1988-05-27|
    DK168462B1|1994-03-28|
    FI78564B|1989-04-28|
    WO1988002485A1|1988-04-07|
    FI863947A|1988-03-31|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2943530A|1956-10-26|1960-07-05|Elastic Stop Nut Corp|Optical indicator for liquid level|
    US3026718A|1959-12-15|1962-03-27|Matson Randolph|Soil moisture indicating gage|
    US3045477A|1961-03-02|1962-07-24|Matson Randolph|Soil moisture indicating gage|
    US3345870A|1963-11-26|1967-10-10|Yoshinaga Prince Kabushiki Kai|Fuel level indicator|
    US3364733A|1964-01-16|1968-01-23|Comstock & Wescott|Liquid content indicating container|
    GB1158573A|1966-02-16|1969-07-16|Lambert S Lancaster Ltd|Improvements in or relating to Moisture Determining Devices|
    US3824844A|1973-05-11|1974-07-23|Water Rite Inc|Soil moisture monitor|
    FR2301013B1|1975-02-12|1977-11-18|Anquetin Jacques|
    DE2726082A1|1977-06-10|1978-12-21|Bosch Siemens Hausgeraete|OPTICAL LIQUID LEVEL INDICATOR, ESPECIALLY FOR HOUSEHOLD APPLIANCES, SUCH AS DISHWASHERS AND WASHING MACHINES, WITH A LIGHT CONDUCTING BAR|
    US4130012A|1977-11-25|1978-12-19|Design Loft Creations, Inc.|Soil moisture indicator|
    GB2152669A|1984-01-10|1985-08-07|Thorn Emi Domestic Appliances|A liquid level indicator|US6766762B2|2001-10-05|2004-07-27|Purdue Research Foundation|Indicator device for soil|
    US20030080304A1|2001-10-31|2003-05-01|Flow-Rite Controls, Inc.|Apparatus and method for monitoring soil moisture conditions and for maintaining soil moisture conditions|
    FR2840068A1|2002-05-27|2003-11-28|Vincent Letocart|Water or moisture detector for closed chamber wall comprises sensory element of a material that loses its mechanical resistance in presence of moisture|
    US20110107825A1|2009-11-12|2011-05-12|Jenkinson Byron J|Anaerobic soil indicator device|
    法律状态:
    2007-09-20| REG| Reference to a code of a succession state|Ref country code: RU Ref legal event code: MM4A Effective date: 20050314 |
    优先权:
    申请号 | 申请日 | 专利标题
    FI863947A|FI78564C|1986-09-30|1986-09-30|FUKTIGHETSINDIKATOR.|
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