US20130271756A1 - Sensor for Monitoring a Medium - Google Patents

Sensor for Monitoring a Medium Download PDF

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Publication number
US20130271756A1
US20130271756A1 US13/824,417 US201113824417A US2013271756A1 US 20130271756 A1 US20130271756 A1 US 20130271756A1 US 201113824417 A US201113824417 A US 201113824417A US 2013271756 A1 US2013271756 A1 US 2013271756A1
Authority
US
United States
Prior art keywords
electromagnetic radiation
medium
detector
sensor according
radiation source
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US13/824,417
Other languages
English (en)
Inventor
Aldo Bojarski
Klaus Erler
Katrin Künzelmann
Andre Legner
Paul Smith
Tobby Straßberger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kyocera Avx Components Dresden GmbH
Original Assignee
AB Elektronik Sachsen GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE202010012771U external-priority patent/DE202010012771U1/de
Priority claimed from DE201010041141 external-priority patent/DE102010041141B4/de
Application filed by AB Elektronik Sachsen GmbH filed Critical AB Elektronik Sachsen GmbH
Assigned to AB ELEKTRONIK SACHSEN GMBH reassignment AB ELEKTRONIK SACHSEN GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LEGNER, ANDRE, BOJARSKI, ALDO, ERLER, KLAUS, KUENZELMANN, KATRIN, STRAßBERGER, Tobby, SMITH, PAUL
Publication of US20130271756A1 publication Critical patent/US20130271756A1/en
Assigned to KYOCERA AVX Components (Dresden) GmbH reassignment KYOCERA AVX Components (Dresden) GmbH CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: AB ELEKTRONIK SACHSEN GMBH
Abandoned legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/28—Investigating the spectrum
    • G01J3/2803—Investigating the spectrum using photoelectric array detector
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
    • G01N21/4133—Refractometers, e.g. differential
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • G01J3/0291—Housings; Spectrometer accessories; Spatial arrangement of elements, e.g. folded path arrangements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • G01J3/10—Arrangements of light sources specially adapted for spectrometry or colorimetry
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/12—Generating the spectrum; Monochromators
    • G01J3/14—Generating the spectrum; Monochromators using refracting elements, e.g. prisms
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00—Features of devices classified in G01N21/00
    • G01N2201/02—Mechanical
    • G01N2201/022—Casings
    • G01N2201/0221—Portable; cableless; compact; hand-held
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00—Features of devices classified in G01N21/00
    • G01N2201/06—Illumination; Optics
    • G01N2201/062—LED's
    • G01N2201/0627—Use of several LED's for spectral resolution

Definitions

  • the invention concerns sensors for monitoring a medium, comprising at least one electromagnetic radiation source and a detector for electromagnetic radiation wherein the medium is located in the beam path between the electromagnetic radiation source and the detector.
  • the publication DE 10 2007 010 805 B3 discloses a method and a device for determining the urea concentration of a solution.
  • light is emitted at various incident angles onto a boundary surface between a denser medium and a less dense medium, i.e., the body and the solution.
  • a boundary surface between the body and the solution must be present.
  • the light is then partially reflected at the boundary surface, depending on the incident angle, wherein with increasing incident angle the proportion of light reflected at the boundary surface increases.
  • the reflected radiation is then detected by an appropriately arranged spatially resolving radiation detector.
  • the publication DE 10 2008 056 559 A1 comprises a sensor arrangement for detection of a first liquid medium in a second liquid medium by means of reflection of an emitted light beam as well as a correlated receiver.
  • two glass rod lenses encapsulated in a housing are arranged parallel to each other.
  • the glass rod lenses have a different optical refractive index than the liquid media.
  • a reflection surface is arranged that is connected to the housing.
  • the invention defined in claim 1 has the object to monitor the material composition of a medium in a simple way.
  • the sensors for monitoring a medium comprising at least one electromagnetic radiation source and a detector for electromagnetic radiation, wherein the medium is in the beam path between the electromagnetic radiation source and the detector, are characterized by their simple realization.
  • the electromagnetic radiation source and the detector are arranged in at least one housing.
  • the housing has two flat wall areas that are positioned angularly relative to each and are transparent for the electromagnetic radiation so that these wall areas and the medium that is located at the wall areas form a prism that refracts the electromagnetic radiation.
  • the detector is at least one one-dimensional sensor with photo diodes for the refracted electromagnetic radiation, wherein a spectrum that changes as the medium changes is detectable.
  • the senor By means of the sensor, medium is monitored by means of the transmitted light principle.
  • the electromagnetic radiation By means of the prism, the electromagnetic radiation is refracted at the incident surface and the exit surface as a function of the wavelength. The result is a spectrum of the electromagnetic radiation source.
  • the refraction of the electromagnetic radiation in particular upon passing through the wall areas, changes so that a changed spectrum is produced also.
  • the position of spectral lines will shift so that the location of the electromagnetic radiation of a specific wavelength impinging on the detector changes. This is detected by the detector so that a change of the medium is detected.
  • This is realized, for example, by means of a known data processing system which is connected to the detector.
  • the data processing system is in particular a known microcomputer.
  • a further advantage resides in that contaminations on the housing which would otherwise lead to an intensity change have no effect on the detection.
  • the senor is characterized in that only the medium is outside of the housing. All components of the sensor are arranged within the housing so that a compact sensor exists.
  • the electromagnetic radiation source and the detector are positioned opposite each other, wherein a space for the medium is positioned therebetween.
  • At least one device is arranged that guides and/or deflects the radiation so that the electromagnetic radiation source and the detector can be positioned adjacent to each other.
  • the configuration is simplified substantially.
  • the electromagnetic radiation source and the detector are positioned on a carrier adjacent to each other.
  • mirrors or total-reflecting prisms constitute the radiation-deflecting device so that the radiation is deflected twice in sequence.
  • the electromagnetic radiation source is advantageously arranged for this purpose relative to the medium above the detector.
  • the medium is positioned in this context between the device and the detector. In this way, a very simple and compact configuration for the sensor is provided.
  • the device that is guiding the radiation according to the embodiment of claim 4 is a light-wave conductor.
  • the light-wave conductor has in this context preferably a U-shape, the radiation of the electromagnetic radiation source impinges on the adjacently positioned detector.
  • electromagnetic radiation sources for radiations of different wavelength and the detector are connected to a data processing system so that sequentially radiation of different wavelength can be refracted in the prism and the resulting spectra can be detected and evaluated.
  • the electromagnetic radiation sources are preferably operated in a cycled fashion so that a spatial shift of individual spectral lines can be detected. The sensitivity of the sensor is increased.
  • the data processing system is a data processing system that determines respectively the location of the electromagnetic radiation of a specific wavelength impinging on the detector. Changes of the medium can be detected easily by the determination of location.
  • a device is arranged that influences the electromagnetic radiation so that electromagnetic radiation of a specific wavelength penetrates the medium and reaches the detector.
  • This is in particular a filter or a screen.
  • the sensitivity of the sensor is increased.
  • a first part of the housing is a cup-shaped formed part comprised of a material that is transparent for the radiation.
  • the first part has moreover a recess for the medium.
  • the housing is dosed off by a cover as the second part of the housing.
  • at least the electromagnetic radiation source and the detector are arranged.
  • the area of the housing with the recess or the cutout is placed in the medium so that the medium is also located in the recess or the cutout.
  • the formed part according to the embodiment of claim 9 is monolithic. Accordingly, it is possible to provide sensors that can be economically beneficially realized.
  • the medium is an aqueous solution so that the concentration of at least one substance is detectable in the aqueous solution.
  • FIG. 1 a sensor for monitoring a medium in a longitudinal section
  • FIG. 2 a sensor in a section illustration.
  • a sensor for monitoring a medium is comprised substantially of an electromagnetic radiation source 1 , a detector 2 , a device 2 deflecting the radiation, and a housing 5 .
  • FIG. 1 shows a sensor for monitoring a medium in a longitudinal section in a principal illustration.
  • the medium is, for example, an aqueous solution.
  • a luminescence diode 1 and as the detector 2 a CCD sensor 2 with photo diodes are used, wherein CCD stands for charge-coupled device.
  • CCD stands for charge-coupled device.
  • the latter is embodied as a one-dimensional (line) or two-dimensional (matrix) CCD sensor 2 .
  • the luminescence diode 1 and the CCD sensor 2 are arranged adjacent to each other on a circuit board 4 as a carrier 4 .
  • the circuit board 4 is located in a first part 6 of the housing 5 .
  • This first part 6 is cup-shaped and is comprised of a material that is transparent for the radiation of the luminescence diode 1 .
  • this first part 6 is a monolithically embodied formed part which has a cutout 8 /a recess for the medium.
  • a radiation-deflecting device 3 with two total-reflecting prisms is arranged so that the radiation is deflected in sequence twice by 90 degrees.
  • the entry of the device 3 is arranged in the plane of the luminescence diode 1 so that its electromagnetic radiation is coupled into the device 3 .
  • the exit for coupling out the electromagnetic radiation of the luminescence diode 1 that has been twice deflected by 90 degrees is arranged in the plane of the CCD sensor 2 .
  • the wall areas are designed flat and are arranged angularly relative to each other.
  • the angle enclosing the wall areas is smaller than 180 degrees.
  • the wall areas are moreover arranged relative to the electromagnetic radiation such that in connection with the medium a prism that refracts the electromagnetic radiation is provided.
  • the optical elements are arranged such that the spectrum of the radiation impinges on the CCD sensor 2 .
  • the location of pre-determined spectral lines is detected.
  • the composition of the medium changes, the refraction will change also.
  • the spectral lines of the radiation are shifted. By means of the CCD sensor 2 , this shift can be determined spatially.
  • an electromagnetic radiation source 1 with at least one specific wavelength is used.
  • electromagnetic radiation of a specific wavelength can be realized in a simple way.
  • the luminescence diode 1 is arranged at a spacing relative to the medium above the CCD sensor 2 (illustration of FIG. 1 ).
  • the luminescence diode 1 is arranged at a spacing adjacent CCD sensor 2 .
  • FIG. 2 shows in this connection a sensor in a principal section illustration.
  • the radiation-deflecting device 3 with devices 10 for deflecting the radiation in the form of mirrors 10 is arranged in a light-guiding passage 9 so that the radiation in sequence is deflected twice by 90 degrees.
  • the radiation-deflecting device 3 and the first part 6 of the housing 5 can be configured to be of a multi-part or single-part configuration.
  • the luminescence diode 1 , the CCD sensor 2 , the device 3 , and the cutout 8 are located in one plane.
  • a slit diaphragm 11 is a component of the device 3 .
  • the electromagnetic radiation source 1 and the CCD sensor 2 are connected to a data processing system. It is a known microcomputer on the circuit board 4 with a microcontroller as a central processing unit.
  • the second part 7 of the housing 5 is a cover so that an overall enclosed sensor for monitoring the medium is realized.

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Pathology (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
US13/824,417 2010-09-21 2011-09-16 Sensor for Monitoring a Medium Abandoned US20130271756A1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE202010012771U DE202010012771U1 (de) 2010-09-21 2010-09-21 Sensor zur Überwachung eines Mediums
DE202010012771.8 2010-09-21
DE201010041141 DE102010041141B4 (de) 2010-09-21 2010-09-21 Sensor zur Überwachung eines Mediums
DE102010041141.8 2010-09-21
PCT/EP2011/066128 WO2012038347A1 (de) 2010-09-21 2011-09-16 Sensor zur überwachung eines mediums

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/066128 A-371-Of-International WO2012038347A1 (de) 2010-09-21 2011-09-16 Sensor zur überwachung eines mediums

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US14/975,792 Continuation US9726541B2 (en) 2010-09-21 2015-12-20 Electromagnetic radiation sensor for monitoring a medium

Publications (1)

Publication Number Publication Date
US20130271756A1 true US20130271756A1 (en) 2013-10-17

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ID=45873469

Family Applications (2)

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US13/824,417 Abandoned US20130271756A1 (en) 2010-09-21 2011-09-16 Sensor for Monitoring a Medium
US14/975,792 Active US9726541B2 (en) 2010-09-21 2015-12-20 Electromagnetic radiation sensor for monitoring a medium

Family Applications After (1)

Application Number Title Priority Date Filing Date
US14/975,792 Active US9726541B2 (en) 2010-09-21 2015-12-20 Electromagnetic radiation sensor for monitoring a medium

Country Status (4)

Country Link
US (2) US20130271756A1 (de)
EP (1) EP2619551B1 (de)
ES (1) ES2666349T3 (de)
WO (1) WO2012038347A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160178437A1 (en) * 2010-09-21 2016-06-23 Ab Elektronik Sachsen Gmbh Electromagnetic Radiation Sensor for Monitoring a Medium
TWI603069B (zh) * 2016-09-05 2017-10-21 浚洸光學科技股份有限公司 液體濃度的檢測裝置
CN112394049A (zh) * 2019-08-16 2021-02-23 恩德莱斯和豪瑟尔分析仪表两合公司 光化学传感器和方法
US20230288332A1 (en) * 2020-05-15 2023-09-14 Horiba Advanced Techno, Co., Ltd. Optical measurement device and water quality analysis system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5015091A (en) * 1988-04-13 1991-05-14 Mitsubishi Denki K.K. Device for detecting alcoholic content
US20150036125A1 (en) * 2010-09-21 2015-02-05 Ab Elektronik Sachsen Gmbh Sensor for monitoring a medium

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JPS5017147B1 (de) * 1970-07-23 1975-06-18
JPH0652237B2 (ja) * 1988-02-03 1994-07-06 株式会社フジクラ 流体屈折計およびこれを用いた流体密度計
DE4033087A1 (de) * 1990-10-18 1992-04-23 Telefunken Systemtechnik Sensorsystem
FR2889312B1 (fr) * 2005-07-26 2007-10-05 Groupe Ecoles Telecomm Refractometre optique pour la mesure de la salinite de l'eau de mer et capteur de salinite correspondant
US7808636B2 (en) * 2007-01-11 2010-10-05 Rensselaer Polytechnic Institute Systems, methods, and devices for handling terahertz radiation
DE102007010805B3 (de) 2007-03-02 2008-10-30 Continental Automotive Gmbh Verfahren und Vorrichtung zur Bestimmung der Harnstoffkonzerntration in einer Lösung
DE102007050731B3 (de) * 2007-10-22 2009-01-08 Flexim Flexible Industriemesstechnik Gmbh Durchlicht-Refraktometer
DE102008056559B4 (de) 2008-11-10 2011-07-07 Faudi Aviation GmbH, 35260 Sensoranordnung
GB2460305B (en) * 2008-11-11 2010-06-16 Univ Montfort Determining the particle size distribution of a suspension
ES2666349T3 (es) * 2010-09-21 2018-05-04 Ab Elektronik Sachsen Gmbh Sensor para vigilar un medio

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5015091A (en) * 1988-04-13 1991-05-14 Mitsubishi Denki K.K. Device for detecting alcoholic content
US5074659A (en) * 1988-04-13 1991-12-24 Mitsubishi Denki K.K. Device for detecting alcoholic content
US20150036125A1 (en) * 2010-09-21 2015-02-05 Ab Elektronik Sachsen Gmbh Sensor for monitoring a medium

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160178437A1 (en) * 2010-09-21 2016-06-23 Ab Elektronik Sachsen Gmbh Electromagnetic Radiation Sensor for Monitoring a Medium
US9726541B2 (en) * 2010-09-21 2017-08-08 Ab Elektronik Sachsen Gmbh Electromagnetic radiation sensor for monitoring a medium
TWI603069B (zh) * 2016-09-05 2017-10-21 浚洸光學科技股份有限公司 液體濃度的檢測裝置
US10025077B2 (en) 2016-09-05 2018-07-17 Chun Kuang Optics Corp. Device for measuring solution concentration
CN112394049A (zh) * 2019-08-16 2021-02-23 恩德莱斯和豪瑟尔分析仪表两合公司 光化学传感器和方法
US20230288332A1 (en) * 2020-05-15 2023-09-14 Horiba Advanced Techno, Co., Ltd. Optical measurement device and water quality analysis system

Also Published As

Publication number Publication date
EP2619551B1 (de) 2018-01-24
WO2012038347A1 (de) 2012-03-29
EP2619551A1 (de) 2013-07-31
ES2666349T3 (es) 2018-05-04
US20160178437A1 (en) 2016-06-23
US9726541B2 (en) 2017-08-08

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AS Assignment

Owner name: AB ELEKTRONIK SACHSEN GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BOJARSKI, ALDO;ERLER, KLAUS;KUENZELMANN, KATRIN;AND OTHERS;SIGNING DATES FROM 20130505 TO 20130521;REEL/FRAME:030537/0160

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION

AS Assignment

Owner name: KYOCERA AVX COMPONENTS (DRESDEN) GMBH, GERMANY

Free format text: CHANGE OF NAME;ASSIGNOR:AB ELEKTRONIK SACHSEN GMBH;REEL/FRAME:063574/0485

Effective date: 20220101