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CN-115769061-B - Device for detecting substances

CN115769061BCN 115769061 BCN115769061 BCN 115769061BCN-115769061-B

Abstract

The invention relates to a device (100) for detecting a substance (102), comprising a light source arrangement (114) adapted to emit a first set of light beams (116) and a second set of light beams (118) towards a first detection area (104), through which the substance (102) is fed. The spectroscopic system (120) is adapted to receive and analyze light (122) reflected and/or scattered by the substance (102) in the first detection zone. The laser triangulation system (124) comprises a laser arrangement (126) adapted to emit a laser line (130) towards the second detection area (106). The camera-based sensor device (128) is configured to receive and analyze light (132) reflected and/or scattered by the substance (102) in the second detection region (106). The received light (122) of the spectroscopic system (120) completely or partially intersects the received light (132) and/or the laser line (130) based on the camera sensor device (128).

Inventors

  • Dirk Baltazar
  • MICHAEL MEYER
  • PATRICK STURM
  • Tobias Tickmantel

Assignees

  • 陶朗分选有限责任公司

Dates

Publication Date
20260505
Application Date
20210504
Priority Date
20200608

Claims (17)

  1. 1. An apparatus (100) for detecting a substance (102), the apparatus (100) comprising: A light source device (114) adapted to emit a first set of light beams (116) and a second set of light beams (118) towards a first detection area (104), through which first detection area a substance (102) is fed, A spectroscopic system (120) comprising a spectrometer, wherein the spectroscopic system (120) is adapted to receive and analyze light (122) reflected and/or scattered by a substance (102) in the first detection zone (104), wherein the received light (122) of the spectroscopic system (120) originates from the first set of light beams (116) and the second set of light beams (118), and A laser triangulation system (124), comprising: A laser device (126) adapted to emit a laser line (130) towards a second detection area (106), through which the substance (102) is fed, and -A camera-based sensor device (128) configured to receive and analyze light (132) reflected and/or scattered by a substance (102) in the second detection area (106), wherein the received light (132) based on the camera-sensor device (128) originates from the laser line (130), Wherein a substance (102) is first transported through one of the first detection zone (104) and the second detection zone (106) and subsequently through the other of the first detection zone (104) and the second detection zone (106), Wherein the received light (122) of the spectroscopic system (120) completely intersects the received light (132) and/or the laser line (130) based on the camera sensor device (128).
  2. 2. The device (100) according to claim 1, wherein the device (100) further comprises focusing means (134), Wherein the focusing means (134) is adapted to direct and focus the first set of light beams (116) and the second set of light beams (118) onto a scanning element (136), Wherein the scanning element (136) is adapted to redirect the first set of light beams (116) and the second set of light beams (118) towards the first detection area (104), whereby the first set of light beams (116) and the second set of light beams (118) converge at the first detection area (104).
  3. 3. The device (100) according to claim 1 or 2, wherein the light source arrangement (114) comprises a first light source (138) adapted to emit the first set of light beams (116), and a second light source (140) adapted to emit the second set of light beams (118).
  4. 4. The apparatus (100) according to claim 2, wherein the focusing device (134) comprises a first focusing element (142) adapted to direct and focus the first set of light beams (116) on the scanning element (136), and a second focusing element (144) adapted to direct and focus the second set of light beams (118) on the scanning element (136).
  5. 5. The apparatus (100) according to claim 2, wherein the light source arrangement (114) comprises a single light source (146) adapted to emit the first set of light beams (116) and the second set of light beams (118).
  6. 6. The apparatus (100) of claim 5, wherein the focusing device (134) comprises a first focusing element (142) adapted to direct and focus the first set of light beams (116) onto the scanning element (136), and a second focusing element (144) adapted to direct and focus the second set of light beams (118) onto the scanning element (136).
  7. 7. The device (100) according to claim 1 or 2, wherein the spectroscopic system (120) comprises a first spectrometer system (120) being adapted to analyze light of a first wavelength interval and a second spectrometer system (120) being adapted to analyze light of a second wavelength interval.
  8. 8. The device (100) according to claim 1 or 2, wherein the spectroscopic system (120) is a scanning spectroscopic system (120).
  9. 9. The device (100) according to claim 1 or 2, wherein the first detection area (104) and the second detection area (106) overlap.
  10. 10. The device (100) according to claim 1 or 2, wherein the device (100) further comprises a first optical filter (150) arranged between the light source arrangement (114) and the first detection area (104), the first optical filter (150) preventing light originating from the first set of light beams (116) and the second set of light beams (118) from reaching the camera-based sensor arrangement (128).
  11. 11. The apparatus (100) according to claim 1 or 2, wherein the apparatus (100) further comprises a second optical filter (152) arranged between the second detection area (106) and the camera-based sensor device (128), the second optical filter (152) preventing light originating from the first set of light beams (116), the second set of light beams (118) and ambient light from passing, while allowing light originating from the laser line (130) to pass.
  12. 12. The apparatus (100) according to claim 1 or 2, the apparatus (100) further comprising a processing unit (113) coupled to the spectroscopic system (120) and the camera sensor device (128), Wherein the processing unit (113) is configured to determine a first set of properties related to the substance (102) in the first detection region (104) based on the output signal (S1) of the spectroscopic system (120), and Wherein the processing unit (113) is configured to determine a second set of properties related to the substance (102) in the second detection area (106) based on the output signal (S2) based on the camera sensor device (128).
  13. 13. The device (100) of claim 12, wherein the first set of properties indicates at least one of a spectral response of the substance (102), a material type of the substance (102), a color of the substance (102), a fluorescence of the substance (102), a maturity of the substance (102), a dry matter content of the substance (102), a moisture content of the substance (102), a fat content of the substance (102), an oil content of the substance (102), a heating value of the substance (102), a presence of bone or fish bone of the substance (102), a presence of a pest of the substance (102), a mineral type of the substance (102), an ore type of the substance (102), a defect level of the substance (102), a detection of a bio-hazardous material of the substance (102), a presence of the substance (102), an absence of the substance (102), a detection of a multi-layer material of the substance (102), a detection of a tag of the substance (102), a presence of the substance (102), a physical quality of the substance (102), and a molecular level of the substance (102).
  14. 14. The apparatus (100) of claim 12, wherein the second set of attributes indicates at least one of a height of the substance (102), a height profile of the substance (102), a 3D map of the substance (102), an intensity profile of reflected and/or scattered light (132), a center of volume of the substance (102), an estimated centroid of the substance (102), an estimated weight of the substance (102), an estimated material of the substance (102), a presence of the substance (102), an absence of the substance (102), a detection of isotropic and anisotropic light scattering of the substance (102), a structure and quality of wood, a surface roughness and texture of the substance (102), and an indication of a presence of fluid in the substance (102).
  15. 15. The apparatus (100) of claim 12, wherein the processing unit (113) is further configured to receive an input indicating a perspective of the camera-based sensor device (128) with respect to the second detection region (106), and Upon determining the second set of attributes, compensating for a viewing angle of the camera-based sensor device (128).
  16. 16. The apparatus (100) according to claim 12, the apparatus (100) further comprising a spraying device (112) coupled to the processing unit (113), Wherein the spraying device (112) is adapted to spray and sort a substance (102) into a plurality of parts in response to a signal received from the processing unit (113) based on the determined first set of properties and/or the determined second set of properties, the spraying device (112) being adapted to spray and sort the substance (102) by at least one of a compressed air jet, a pressurized water jet, a mechanical finger, a compressed air jet wand, a pressurized water jet wand, a mechanical finger wand, a mechanical arm and a mechanical diverter.
  17. 17. The device (100) according to claim 1 or 2, the device (100) further comprising: a conveyor (108) for conveying a substance through the first detection zone (104) and the second detection zone (106), or A chute (148), optionally comprising a vibratory feeder, for sliding or free falling the substance through the first detection zone and/or the second detection zone.

Description

Device for detecting substances Technical Field The present invention relates to an apparatus for detecting a substance, and more particularly to such an apparatus comprising a spectroscopic system and a laser triangulation system. Background Identification, detection, classification and sorting of various objects is often needed and desired in a wide industrial context. In its simplest form, manual identification of objects by a person may be advantageously employed when a limited number of objects are to be identified, sorted and classified. The mentioned person can then identify and classify the object concerned based on his/her knowledge. However, this type of manual identification is tedious and error prone. Furthermore, the level of experience of the operator will significantly affect the outcome of the operations performed by the operator. Furthermore, manual recognition of the above type suffers from a lower recognition speed. Thus, in the industry, identification, sorting and sorting of bulk items is typically performed by machines, wherein the bulk items are supplied in a continuous stream of items. Such machines are typically faster than operators and are operable for longer periods of time, thus providing enhanced overall throughput. Machines of this type are used, for example, for fruits and vegetables in agriculture, and in recycling to identify and sort objects and materials to be recycled. Machines of the above type typically have some form of sensor for identifying the object of interest. For example, an optical sensor in the form of a spectral sensor may be employed to determine the quality of harvested fruit and vegetables. Similarly, a spectroscopic sensor may be employed to determine the material of the object to be recovered. However, to determine more properties of an object, multiple sensors are typically required. The use of more than one sensor generally results in that the machine will have to be made larger in order to be able to fit further sensors and related entities as required. Thus, the footprint of the machine increases. The increased footprint results in the need for valuable industrial space for installing the machine, which may be used for other purposes. Moreover, if the sensors are not located far enough from each other, the use of additional sensors may cause the sensors to interfere with each other. DE 196 50 A1 discloses a method and arrangement for realizing a more compact and inexpensive multi-sensor camera, wherein different image sensors sensitive to different properties are vertically stacked on top of each other in a common beam path. Each stacked image sensor is aligned such that corresponding pixels of the respective image sensor observe the same portion of the object being observed. WO 01/07950 A1 discloses a sorting device provided with an inspection unit, in which the acceptability of the products to be sorted is inspected. US 2016/0263624 A1 discloses an apparatus for detecting a substance, wherein a plurality of objects are fed into a detection zone. An object is irradiated in a detection area, and light that has passed through the object is detected. US 2004/0027574 A1 discloses an apparatus and method for sensing the presence of bright white paper on a conveyor of a paper sorting system by using fluorescence triggered by ultraviolet light. Disclosure of Invention In view of the above, it is an object of the present invention to provide a device for detecting a substance, which is compact and thus requires less installation space. It is a further object to provide such an apparatus which enables efficient detection of substances by using a spectroscopic system and a laser triangulation system. Another object is to provide a device that enables enhanced detection of substances. More specifically, according to the present invention there is provided an apparatus for detecting a substance, the apparatus comprising a light source arrangement adapted to emit a first set of light beams and a second set of light beams towards a first detection area through which the substance is fed, a spectroscopic system comprising a spectrometer, wherein the spectroscopic system is adapted to receive and analyze light reflected and/or scattered by the substance in the first detection area, wherein the received light sources of the spectroscopic system are from the first set of light beams and the second set of light beams, and a laser triangulation system comprising a laser arrangement adapted to emit laser lines towards the second detection area and a camera-based sensor arrangement adapted to receive and analyze light reflected and/or scattered by the substance in the second detection area, wherein the received light sources of the camera-based sensor arrangement are free-running light, wherein the received light of the spectroscopic system is fully or partially intersected by the received light and/or laser lines of the camera-based sensor arrangement. The apparatus co