US20130271756A1 - Sensor for Monitoring a Medium - Google Patents
Sensor for Monitoring a Medium Download PDFInfo
- 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
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- electromagnetic radiation
- medium
- detector
- sensor according
- radiation source
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 10
- 230000005670 electromagnetic radiation Effects 0.000 claims abstract description 61
- 238000001228 spectrum Methods 0.000 claims abstract description 8
- 230000005855 radiation Effects 0.000 claims description 24
- 238000012545 processing Methods 0.000 claims description 10
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 2
- 238000004020 luminiscence type Methods 0.000 description 11
- 230000003595 spectral effect Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000011109 contamination Methods 0.000 description 2
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- 239000000203 mixture Substances 0.000 description 2
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- 230000035945 sensitivity Effects 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
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- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
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- 238000000034 method Methods 0.000 description 1
Images
Classifications
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- 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.
Abstract
The invention relates to sensors for monitoring a medium comprising at least one electromagnetic radiation source and a detector of electromagnetic radiation, the medium being located in the ray path between the electromagnetic radiation source and the detector. The sensors are characterized by their ease of production. To that end, the electromagnetic radiation source and detector are disposed in at least one housing. Furthermore, the housing comprises two flat wall regions which are arranged at a mutual angle and are transparent to the electromagnetic radiation, such that these wall regions and the medium located thereat form a prism which refracts the electromagnetic radiation. In addition, the detector is at least a one-dimensional sensor comprising photo diodes for the refracted electromagnetic radiation, a spectrum which varies when the medium varies being detectable.
Description
- 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. For this purpose, 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. For this purpose, 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. For this purpose, 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. Opposite the glass rod lenses a reflection surface is arranged that is connected to the housing. - It is disadvantageous that depositions and contaminations of the boundary surface or of the reflection surface can falsify the measured result.
- The invention defined in
claim 1 has the object to monitor the material composition of a medium in a simple way. - This object is solved by the features disclosed in
claim 1. - 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.
- For this purpose, the electromagnetic radiation source and the detector are arranged in at least one housing. Moreover, 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. Moreover, 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.
- By means of the sensor, medium is monitored by means of the transmitted light principle. 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. Upon a change of the medium 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. In this context, 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 same applies to components in the medium that make the medium turbid. Decisive for the detection is the incident location of the electromagnetic radiation and not its intensity. Accordingly, even aging processes of the radiation source and of the detector have no effect on the sensor for monitoring a medium.
- Moreover, the sensor 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. In the simplest case, for this purpose the electromagnetic radiation source and the detector are positioned opposite each other, wherein a space for the medium is positioned therebetween.
- Advantageous embodiments of the invention are disclosed in the
claims 2 to 10. - In the beam path downstream of the electromagnetic radiation source, according to the embodiment of
claim 2, 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. - Favorably, according to the embodiment of
claim 3, 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. When 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.
- According to the embodiment of
claim 5, 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. For this purpose, 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 according to the embodiment of
claim 6 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. - In the beam path downstream of the electromagnetic radiation source according to the embodiment of claim 7 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.
- According to the embodiment of
claim 8, 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. In the first part, 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. By means of the wall areas of the recess or of the cutout that are angularly arranged relative to each other, the radiation is coupled out and, after passing the medium, is coupled in. - Beneficially, 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.
- Beneficially, according to the embodiment of
claim 10, the medium is an aqueous solution so that the concentration of at least one substance is detectable in the aqueous solution. - One embodiment of the invention is illustrated in the drawings in principle, respectively, and will be explained in more detail in the following.
- It is shown in:
-
FIG. 1 a sensor for monitoring a medium in a longitudinal section, and -
FIG. 2 a sensor in a section illustration. - A sensor for monitoring a medium is comprised substantially of an
electromagnetic radiation source 1, adetector 2, adevice 2 deflecting the radiation, and ahousing 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. As is known, as the electromagnetic radiation source 1 a
luminescence diode 1 and as the detector 2 aCCD sensor 2 with photo diodes are used, wherein 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 theCCD 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 thehousing 5. Thisfirst part 6 is cup-shaped and is comprised of a material that is transparent for the radiation of theluminescence diode 1. Moreover, thisfirst part 6 is a monolithically embodied formed part which has acutout 8/a recess for the medium. - In the beam path downstream of the
luminescence diode 1, a radiation-deflectingdevice 3 with two total-reflecting prisms is arranged so that the radiation is deflected in sequence twice by 90 degrees. The entry of thedevice 3 is arranged in the plane of theluminescence diode 1 so that its electromagnetic radiation is coupled into thedevice 3. The exit for coupling out the electromagnetic radiation of theluminescence diode 1 that has been twice deflected by 90 degrees is arranged in the plane of theCCD sensor 2. Between thedevice 3 andCCD sensor 2 there is thecutout 8 for the medium so that through the wall areas of thecutout 8 the electromagnetic radiation penetrates the space, formed by thecutout 8, with the medium. 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. In this context, the location of pre-determined spectral lines is detected. When the composition of the medium changes, the refraction will change also. The spectral lines of the radiation are shifted. By means of theCCD sensor 2, this shift can be determined spatially. - This can be done also with regard to the change of electromagnetic radiation of a specific wavelength. In this connection, an
electromagnetic radiation source 1 with at least one specific wavelength is used. - By using a
multi-color luminescence diode 1 as anelectromagnetic radiation source 1, electromagnetic radiation of a specific wavelength can be realized in a simple way. - In a first embodiment, the
luminescence diode 1 is arranged at a spacing relative to the medium above the CCD sensor 2 (illustration ofFIG. 1 ). - In the second embodiment, the
luminescence diode 1 is arranged at a spacingadjacent CCD sensor 2. -
FIG. 2 shows in this connection a sensor in a principal section illustration. - In the beam path downstream of the
luminescence diode 1, the radiation-deflectingdevice 3 withdevices 10 for deflecting the radiation in the form ofmirrors 10 is arranged in a light-guiding passage 9 so that the radiation in sequence is deflected twice by 90 degrees. The radiation-deflectingdevice 3 and thefirst part 6 of thehousing 5 can be configured to be of a multi-part or single-part configuration. Theluminescence diode 1, theCCD sensor 2, thedevice 3, and thecutout 8 are located in one plane. In a variant of this second embodiment, aslit diaphragm 11 is a component of thedevice 3. - For controlling the measurement and evaluation of the measured results, the
electromagnetic radiation source 1 and theCCD 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 thehousing 5 is a cover so that an overall enclosed sensor for monitoring the medium is realized.
Claims (10)
1. Sensor for monitoring a medium comprising at least one electromagnetic radiation source and a detector for electromagnetic radiation, wherein the medium is located in a beam path between the electromagnetic radiation source and the detector, characterized in that the electromagnetic radiation source (1) and the detector (2) are arranged in at least one housing (5), in that the housing (5) has two flat wall areas that are angularly arranged relative to each other and are transparent for the electromagnetic radiation so that these wall areas and the medium located at the wall areas form a prism that refracts the electromagnetic radiation, and in that the detector (2) has at least a one-dimensional sensor with photo diodes for the refracted electromagnetic radiation, wherein a spectrum that changes with a change of the medium is detectable.
2. Sensor according to claim 1 , characterized in that in the beam path downstream of the electromagnetic radiation source (1) at least one device (3) for guiding and/or deflecting the radiation is arranged so that the electromagnetic radiation source (1) and the detector (2) can be placed adjacent to each other.
3. Sensor according to claim 1 , characterized in that mirrors (10) or total-reflecting prisms are the radiation-deflecting device (3) so that the radiation is deflected twice in sequence.
4. Sensor according to claim 1 , characterized in that the device (3) guiding the radiation is a light-wave conductor.
5. Sensor according to claim 1 , characterized in that electromagnetic radiation sources (1) for radiations of different wavelength and the detector (2) are connected to a data processing system so that sequentially radiation of different wavelength are refracted in the prism, formed of the wall areas and the medium located at the wall areas, and the resulting spectra can be detected and evaluated.
6. Sensor according to claim 5 , characterized in that the data processing system is a data processing system that determines the location of the electromagnetic radiation of a specific wavelength reaching the detector (2).
7. Sensor according to claim 1 , characterized in that in the beam path downstream of the electromagnetic radiation source (1) a device is arranged that influences the electromagnetic radiation so that electromagnetic radiation of a specific wavelength penetrates the medium and reaches the detector (2).
8. Sensor according to claim 1 , characterized in that a first part (6) of the housing (5) is a cup-shaped formed part comprised of a material transparent for the radiation, in that the first part (6) comprises a recess or a cutout (8) with the wall areas for the medium, and in that a second part (7) of the housing (5) is a cover (7).
9. Sensor according to claim 8 , characterized in that the formed part is embodied monolithically.
10. Sensor according to claim 1 , characterized in that the medium is an aqueous solution so that the concentration of at least one substance in the aqueous solution can be detected.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201010041141 DE102010041141B4 (en) | 2010-09-21 | 2010-09-21 | Sensor for monitoring a medium |
DE202010012771U DE202010012771U1 (en) | 2010-09-21 | 2010-09-21 | Sensor for monitoring a medium |
DE102010041141.8 | 2010-09-21 | ||
DE202010012771.8 | 2010-09-21 | ||
PCT/EP2011/066128 WO2012038347A1 (en) | 2010-09-21 | 2011-09-16 | Sensor for monitoring a medium |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/EP2011/066128 A-371-Of-International WO2012038347A1 (en) | 2010-09-21 | 2011-09-16 | Sensor for monitoring a medium |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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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 |
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US20130271756A1 true US20130271756A1 (en) | 2013-10-17 |
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Application Number | Title | Priority Date | Filing Date |
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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 |
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US14/975,792 Active US9726541B2 (en) | 2010-09-21 | 2015-12-20 | Electromagnetic radiation sensor for monitoring a medium |
Country Status (4)
Country | Link |
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US (2) | US20130271756A1 (en) |
EP (1) | EP2619551B1 (en) |
ES (1) | ES2666349T3 (en) |
WO (1) | WO2012038347A1 (en) |
Cited By (3)
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 (en) * | 2016-09-05 | 2017-10-21 | 浚洸光學科技股份有限公司 | Device for measuring solution concentration |
CN112394049A (en) * | 2019-08-16 | 2021-02-23 | 恩德莱斯和豪瑟尔分析仪表两合公司 | Optical chemical sensor and method |
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US7808636B2 (en) * | 2007-01-11 | 2010-10-05 | Rensselaer Polytechnic Institute | Systems, methods, and devices for handling terahertz radiation |
DE102007010805B3 (en) | 2007-03-02 | 2008-10-30 | Continental Automotive Gmbh | Method and device for determining the urea concentration in a solution |
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US20130271756A1 (en) * | 2010-09-21 | 2013-10-17 | Ab Elektronik Sachsen Gmbh | Sensor for Monitoring a Medium |
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2011
- 2011-09-16 US US13/824,417 patent/US20130271756A1/en not_active Abandoned
- 2011-09-16 EP EP11761324.0A patent/EP2619551B1/en active Active
- 2011-09-16 WO PCT/EP2011/066128 patent/WO2012038347A1/en active Application Filing
- 2011-09-16 ES ES11761324.0T patent/ES2666349T3/en active Active
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2015
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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 (5)
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 (en) * | 2016-09-05 | 2017-10-21 | 浚洸光學科技股份有限公司 | Device for measuring solution concentration |
US10025077B2 (en) | 2016-09-05 | 2018-07-17 | Chun Kuang Optics Corp. | Device for measuring solution concentration |
CN112394049A (en) * | 2019-08-16 | 2021-02-23 | 恩德莱斯和豪瑟尔分析仪表两合公司 | Optical chemical sensor and method |
Also Published As
Publication number | Publication date |
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US9726541B2 (en) | 2017-08-08 |
ES2666349T3 (en) | 2018-05-04 |
EP2619551A1 (en) | 2013-07-31 |
EP2619551B1 (en) | 2018-01-24 |
US20160178437A1 (en) | 2016-06-23 |
WO2012038347A1 (en) | 2012-03-29 |
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