EP2530387B1 - A cooking oven including an apparatus for detecting the three-dimensional shape of food stuff on a food stuff carrier - Google Patents

A cooking oven including an apparatus for detecting the three-dimensional shape of food stuff on a food stuff carrier Download PDF

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Publication number
EP2530387B1
EP2530387B1 EP11004539.0A EP11004539A EP2530387B1 EP 2530387 B1 EP2530387 B1 EP 2530387B1 EP 11004539 A EP11004539 A EP 11004539A EP 2530387 B1 EP2530387 B1 EP 2530387B1
Authority
EP
European Patent Office
Prior art keywords
camera
food stuff
cooking oven
drawer
laser
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.)
Not-in-force
Application number
EP11004539.0A
Other languages
German (de)
French (fr)
Other versions
EP2530387A1 (en
Inventor
Christoph Luckhardt
Florian Ruther
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.)
Electrolux Home Products Corp NV
Original Assignee
Electrolux Home Products Corp NV
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
Application filed by Electrolux Home Products Corp NV filed Critical Electrolux Home Products Corp NV
Priority to EP17165684.6A priority Critical patent/EP3220058A1/en
Priority to EP11004539.0A priority patent/EP2530387B1/en
Publication of EP2530387A1 publication Critical patent/EP2530387A1/en
Application granted granted Critical
Publication of EP2530387B1 publication Critical patent/EP2530387B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/08—Arrangement or mounting of control or safety devices
    • F24C7/082—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination
    • F24C7/085—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination on baking ovens
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/16—Shelves, racks or trays inside ovens; Supports therefor
    • F24C15/162—Co-operating with a door, e.g. operated by the door

Definitions

  • the present invention relates to a cooking oven with an apparatus for detecting the three-dimensional shape of food stuff on a food stuff carrier according to the preamble of claim 1.
  • the measuring of the three-dimensional shape of food stuff inside the oven cavity can be used for the calculation of the temperature in the core of the food stuff and as an input for an automatic cooking program.
  • the measuring of the three-dimensional shape of food stuff can be realized by a camera and a laser.
  • the camera and the laser have to be positioned in such places, which are cool enough, in order to insure the function ability and a long lifetime of the camera and laser.
  • the positions of the camera and the laser should result in an angle between the optical axis of the camera and the laser beam, which angle allows a sufficient accuracy of the triangulation between the laser, food stuff and camera.
  • the food stuff should be moved under the laser beam or the laser beam should be moved over the food stuff in a reproducible and smooth way.
  • the changes of the oven structure for installing the measuring equipment should be minimized.
  • WO 2010/012340 A1 discloses a cooking oven for automatic heating procedures.
  • the cooking oven comprises a camera and a laser.
  • the camera and the laser are positioned at the upper side of the chamber opening.
  • the laser is inclined by a predefined angle.
  • the laser emits a fan-shaped laser beam and the camera records continuously top views of the baking tray.
  • the speed or the shift of positions of the baking tray has to be detected or predetermined, in order to create a three-dimensional model of the food stuff.
  • CN 101059338 A discloses a method for measuring the position of a carbonization chamber in a coal coke charring room.
  • a camera, a laser and a reference body are used.
  • the speed or the shift of positions of the moved objects has to be detected or predetermined.
  • JP 2001099615 A discloses a three-dimensional object shape measuring instrument.
  • a camera and a laser are moveable inside the oven chamber. The movement of the camera and laser as well as the evaluation require a complex controller.
  • CN 101059338 A discloses a cooking oven with a detection part for detecting the position of a food-holding component, so that the user is informed, if the food-holding component is correctly placed inside the oven chamber.
  • a one-dimensional sensor detects the distance between the top wall of the oven chamber and the food-holding component.
  • the cooking oven comprises a drawer, wherein the camera is arranged at a top portion of a vertical part of said drawer, and wherein the food stuff carrier is arranged at the vertical part and/or on a horizontal part of said drawer, and wherein the laser is arranged behind a front frame of the oven cavity, and wherein the food stuff carrier and the camera are mechanically coupled, so that the camera and the food stuff carrier are synchronously moveable.
  • the main idea of the cooking oven according to the present invention is the moveable camera and the stationary laser, wherein the camera is mechanically coupled to the food stuff carrier, in particular baking tray, and the laser is arranged above the oven cavity. Since the camera and the baking tray are coupled, the distance between the camera and the food stuff is constant, so that the detection of the three-dimensional shape of the food stuff is independent of the speed of the food stuff carrier, when said food stuff carrier is moved into the oven cavity.
  • the cooking oven with the apparatus can be realized by low complexity and low costs.
  • the cooking oven comprises a drawer, wherein the camera is arranged at a top portion of a vertical part of said drawer, and the food stuff carrier is arranged at the vertical part and/or on a horizontal part of said drawer.
  • the combination of the drawer and the apparatus contributes that the inventive cooking oven may be realized by low complexity and low costs.
  • the vertical part of the drawer is formed as an oven door.
  • the oven door as vertical part of the drawer contributes also the low complexity of the cooking oven.
  • the camera is arranged inside a top portion of the oven door.
  • the camera is protected from heat and dirt.
  • the laser Since the laser is arranged behind a front frame of the oven cavity, in this position the laser can easily be kept cool.
  • the front frame may comprise at least one hole for the laser beam.
  • the angle between the central axis of the field or range of vision of the camera and the laser beam is between 30° and 60°, preferably about 45°.
  • FIG 1 illustrates a schematic sectional side view of a drawer oven with an apparatus for detecting the three-dimensional shape of food stuff according to a preferred embodiment of the present invention.
  • the drawer oven comprises a stationary oven cavity 10 and a moveable drawer 12.
  • the drawer 12 is moveable into the oven cavity 10 along a horizontal direction.
  • the drawer 12 includes a vertical part 14 and a horizontal part 16.
  • the vertical part 14 of the drawer 12 forms an oven door.
  • the horizontal part 16 of the drawer 12 is movably arranged within a lower portion of the oven cavity 10.
  • the drawer 12 comprises a baking tray 18 for receiving food stuff.
  • the baking tray 18 is attached at the vertical part 14 of the drawer 12.
  • the baking tray 18 may be attached at the vertical part 14 of the drawer 12 and/or on the horizontal part 16 of the drawer 12.
  • the baking tray 18 extends substantially within a horizontal plane.
  • a camera 20 is arranged at a top portion of the horizontal part 16 of the drawer 12.
  • a field of vision 22 of the camera 20 is directed onto an upper side of the baking tray 18.
  • the field of vision 22 of the camera 20 covers substantially the whole upper side of the baking tray 18.
  • the camera 20 is arranged inside the vertical part 14 of the drawer 12, i.e. inside the oven door.
  • the place of the camera 20 can be kept cool enough without high complexity.
  • a laser 24 is arranged upon an upper front portion of the oven cavity 10.
  • the laser 24 is arranged behind a front frame of the oven cavity 10. In this position the laser 24 can be kept cool by low complexity. Since the laser 24 is arranged outside the oven cavity 10, it is protected from heat and dirt. Further, the laser 24 can be cleaned easily.
  • a laser beam 26 from the laser 24 is directed downwardly. Through a hole in the front frame of the oven cavity 10 the laser beam 26 can be projected over the whole width of the baking tray 18.
  • angle ⁇ of about 45° between a central axis 28 of the field of vision 22 of the camera 20 on the one hand and the direction of the laser beam 26 on the other hand.
  • the angle ⁇ of about 45° between the laser beam 26 and the central axis 28 allows a good resolution of the triangulation measurement between the camera 20, the laser 26 and the foodstuff.
  • the laser 24 forms the stationary part of the apparatus for detecting the three-dimensional shape of food stuff.
  • the camera 20 and the baking tray 18 form the mobile part of the apparatus for detecting the three-dimensional shape of food stuff. Since the camera 20 and the baking tray 18 are fixed at the drawer 12, the distance between the camera 20 and the food stuff is constant. Thus, the detection of the three-dimensional shape of the food stuff is independent of the speed of inserting the drawer 12 into the oven cavity.
  • a coupling between the baking tray 18 and the camera 20 is provided, wherein the drawer 12 is not necessary.
  • the coupling between the baking tray 18 and the camera 20 may be realized by arbitrary mechanical equipment, so that the movement of the camera 20 depends on the movement of the baking tray 18. Further, the movement of the camera 20 may be driven by a motor in dependence of the position of the baking tray 18.
  • another food stuff carrier can be used instead of a baking tray for instance a grid or plate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Baking, Grill, Roasting (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Description

  • The present invention relates to a cooking oven with an apparatus for detecting the three-dimensional shape of food stuff on a food stuff carrier according to the preamble of claim 1.
  • The measuring of the three-dimensional shape of food stuff inside the oven cavity can be used for the calculation of the temperature in the core of the food stuff and as an input for an automatic cooking program. The measuring of the three-dimensional shape of food stuff can be realized by a camera and a laser. During the development of the method for the three-dimensional measuring of the shape of food stuff it became clear that the combination of the measuring equipment, i.e. camera and a laser, and the baking tray has several advantages and is the only commercially feasible solution.
  • However, there are some problems relating to the combination of the measuring equipment and the cooking oven. The camera and the laser have to be positioned in such places, which are cool enough, in order to insure the function ability and a long lifetime of the camera and laser. The positions of the camera and the laser should result in an angle between the optical axis of the camera and the laser beam, which angle allows a sufficient accuracy of the triangulation between the laser, food stuff and camera. The food stuff should be moved under the laser beam or the laser beam should be moved over the food stuff in a reproducible and smooth way. The changes of the oven structure for installing the measuring equipment should be minimized.
  • WO 2010/012340 A1 discloses a cooking oven for automatic heating procedures. The cooking oven comprises a camera and a laser. The camera and the laser are positioned at the upper side of the chamber opening. The laser is inclined by a predefined angle. During inserting the baking tray with food stuff, the laser emits a fan-shaped laser beam and the camera records continuously top views of the baking tray. However, the speed or the shift of positions of the baking tray has to be detected or predetermined, in order to create a three-dimensional model of the food stuff.
  • CN 101059338 A discloses a method for measuring the position of a carbonization chamber in a coal coke charring room. A camera, a laser and a reference body are used. However, also in this case the speed or the shift of positions of the moved objects has to be detected or predetermined.
  • JP 2001099615 A discloses a three-dimensional object shape measuring instrument. A camera and a laser are moveable inside the oven chamber. The movement of the camera and laser as well as the evaluation require a complex controller.
  • CN 101059338 A discloses a cooking oven with a detection part for detecting the position of a food-holding component, so that the user is informed, if the food-holding component is correctly placed inside the oven chamber. A one-dimensional sensor detects the distance between the top wall of the oven chamber and the food-holding component.
  • It is an object of the present invention to provide a cooking oven including an apparatus for detecting the three-dimensional shape of food stuff on a food stuff carrier, in particular a baking tray, wherein said apparatus is realized by low complexity and low costs.
    The object of the present invention is achieved by the cooking oven according to claim 1.
    According to the present invention the cooking oven comprises a drawer, wherein the camera is arranged at a top portion of a vertical part of said drawer, and wherein the food stuff carrier is arranged at the vertical part and/or on a horizontal part of said drawer, and wherein the laser is arranged behind a front frame of the oven cavity, and wherein the food stuff carrier and the camera are mechanically coupled, so that the camera and the food stuff carrier are synchronously moveable.
    The main idea of the cooking oven according to the present invention is the moveable camera and the stationary laser, wherein the camera is mechanically coupled to the food stuff carrier, in particular baking tray, and the laser is arranged above the oven cavity. Since the camera and the baking tray are coupled, the distance between the camera and the food stuff is constant, so that the detection of the three-dimensional shape of the food stuff is independent of the speed of the food stuff carrier, when said food stuff carrier is moved into the oven cavity. The cooking oven with the apparatus can be realized by low complexity and low costs.
  • According to the present invention the cooking oven comprises a drawer, wherein the camera is arranged at a top portion of a vertical part of said drawer, and the food stuff carrier is arranged at the vertical part and/or on a horizontal part of said drawer. The combination of the drawer and the apparatus contributes that the inventive cooking oven may be realized by low complexity and low costs.
    In particular, the vertical part of the drawer is formed as an oven door. The oven door as vertical part of the drawer contributes also the low complexity of the cooking oven.
  • Preferably, the camera is arranged inside a top portion of the oven door. Thus, the camera is protected from heat and dirt.
  • Since the laser is arranged behind a front frame of the oven cavity, in this position the laser can easily be kept cool.
    In the latter case, the front frame may comprise at least one hole for the laser beam.
    According to a preferred embodiment of the present invention the angle between the central axis of the field or range of vision of the camera and the laser beam is between 30° and 60°, preferably about 45°.
    Novel and inventive features of the present invention are set forth in the appended claims.
    The present invention will be described in further detail with reference to the drawing, in which
    • FIG 1
    illustrates a schematic sectional side view of a drawer oven with an apparatus for detecting the three-dimensional shape of food stuff according to a pre-ferred embodiment of the present invention.
  • FIG 1 illustrates a schematic sectional side view of a drawer oven with an apparatus for detecting the three-dimensional shape of food stuff according to a preferred embodiment of the present invention.
  • The drawer oven comprises a stationary oven cavity 10 and a moveable drawer 12. The drawer 12 is moveable into the oven cavity 10 along a horizontal direction. The drawer 12 includes a vertical part 14 and a horizontal part 16. The vertical part 14 of the drawer 12 forms an oven door. The horizontal part 16 of the drawer 12 is movably arranged within a lower portion of the oven cavity 10. The drawer 12 comprises a baking tray 18 for receiving food stuff. In this example the baking tray 18 is attached at the vertical part 14 of the drawer 12. In general, the baking tray 18 may be attached at the vertical part 14 of the drawer 12 and/or on the horizontal part 16 of the drawer 12. The baking tray 18 extends substantially within a horizontal plane.
  • A camera 20 is arranged at a top portion of the horizontal part 16 of the drawer 12. A field of vision 22 of the camera 20 is directed onto an upper side of the baking tray 18. The field of vision 22 of the camera 20 covers substantially the whole upper side of the baking tray 18. In this example, the camera 20 is arranged inside the vertical part 14 of the drawer 12, i.e. inside the oven door. Thus, the place of the camera 20 can be kept cool enough without high complexity.
  • There are no additional costs for positioning the camera 20 inside the oven door. Inside the vertical part 14 of the drawer 12 there is no danger of damaging said camera 20.
  • A laser 24 is arranged upon an upper front portion of the oven cavity 10. The laser 24 is arranged behind a front frame of the oven cavity 10. In this position the laser 24 can be kept cool by low complexity. Since the laser 24 is arranged outside the oven cavity 10, it is protected from heat and dirt. Further, the laser 24 can be cleaned easily. A laser beam 26 from the laser 24 is directed downwardly. Through a hole in the front frame of the oven cavity 10 the laser beam 26 can be projected over the whole width of the baking tray 18.
  • There is an angle α of about 45° between a central axis 28 of the field of vision 22 of the camera 20 on the one hand and the direction of the laser beam 26 on the other hand. The angle α of about 45° between the laser beam 26 and the central axis 28 allows a good resolution of the triangulation measurement between the camera 20, the laser 26 and the foodstuff.
  • The laser 24 forms the stationary part of the apparatus for detecting the three-dimensional shape of food stuff. The camera 20 and the baking tray 18 form the mobile part of the apparatus for detecting the three-dimensional shape of food stuff. Since the camera 20 and the baking tray 18 are fixed at the drawer 12, the distance between the camera 20 and the food stuff is constant. Thus, the detection of the three-dimensional shape of the food stuff is independent of the speed of inserting the drawer 12 into the oven cavity.
  • In an alternative embodiment of the present invention a coupling between the baking tray 18 and the camera 20 is provided, wherein the drawer 12 is not necessary. The coupling between the baking tray 18 and the camera 20 may be realized by arbitrary mechanical equipment, so that the movement of the camera 20 depends on the movement of the baking tray 18. Further, the movement of the camera 20 may be driven by a motor in dependence of the position of the baking tray 18.
  • Although an illustrative embodiment of the present invention has been described herein with reference to the accompanying drawing, it is to be understood that the present invention is not limited to that precise embodiment, and that various other changes and modifications may be affected therein by one skilled in the art without departing from the scope of the invention. All such changes and modifications are intended to be included within the scope of the invention as defined by the appended claims.
  • For instance, another food stuff carrier can be used instead of a baking tray for instance a grid or plate.
    • List of reference numerals
    • 10
    oven cavity
    12
    drawer
    14
    vertical part, oven door
    16
    horizontal part
    18
    baking tray
    20
    camera
    22
    field of vision
    24
    laser
    26
    laser beam
    28
    central axis of the field of vision 22
    α
    angle between laser beam 28 and central axis 28

Claims (5)

  1. A cooking oven including an apparatus for detecting the three-dimensional shape of food stuff on a food stuff carrier, in particular a baking tray (18), of said cooking oven, wherein:
    - the apparatus includes at least one laser (24) arranged above an oven cavity (10) of the cooking oven,
    - a laser beam (26) from the laser (24) is directed downwardly,
    - the apparatus includes at least one camera (20) arranged above the food stuff carrier (18) of the cooking oven,
    - the camera (20) is arranged in a front portion of the cooking oven,
    - an upper side of the food stuff carrier (18) is within a range of vision (22) of the camera (20), and
    - an angle between a central axis (28) of a range of vision (22) of the camera (20) and the laser beam (26) is predetermined,
    characterized in, that
    the cooking oven comprises a drawer (12), wherein the camera (20) is arranged at a top portion of a vertical part (14) of said drawer (12), and wherein the food stuff carrier (18) is arranged at the vertical part (14) and/or on a horizontal part (16) of said drawer (12), and wherein the laser (24) is arranged behind a front frame of the oven cavity (10), and wherein the food stuff carrier (18) and the camera (20) are mechanically coupled, so that the camera (20) and the food stuff carrier (18) are synchronously moveable.
  2. The cooking oven according to claim 1,
    characterized in, that
    the vertical part (14) of the drawer (12) is formed as an oven door.
  3. The cooking oven according to claim 2,
    characterized in, that
    the camera (20) is arranged inside a top portion of the oven door.
  4. The cooking oven according to any one of the preceding claims,
    characterized in, that
    the front frame comprises at least one hole for the laser beam (16).
  5. The cooking oven according to any one of the preceding claims,
    characterized in, that
    the angle between the central axis (28) of the range of vision (22) of the camera (20) and the laser beam (26) is between 30° and 60°, preferably about 45°.
EP11004539.0A 2011-06-03 2011-06-03 A cooking oven including an apparatus for detecting the three-dimensional shape of food stuff on a food stuff carrier Not-in-force EP2530387B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP17165684.6A EP3220058A1 (en) 2011-06-03 2011-06-03 A cooking oven including an apparatus for detecting the three-dimensional shape of food stuff on a food stuff carrier
EP11004539.0A EP2530387B1 (en) 2011-06-03 2011-06-03 A cooking oven including an apparatus for detecting the three-dimensional shape of food stuff on a food stuff carrier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11004539.0A EP2530387B1 (en) 2011-06-03 2011-06-03 A cooking oven including an apparatus for detecting the three-dimensional shape of food stuff on a food stuff carrier

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP17165684.6A Division EP3220058A1 (en) 2011-06-03 2011-06-03 A cooking oven including an apparatus for detecting the three-dimensional shape of food stuff on a food stuff carrier

Publications (2)

Publication Number Publication Date
EP2530387A1 EP2530387A1 (en) 2012-12-05
EP2530387B1 true EP2530387B1 (en) 2017-04-26

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Family Applications (2)

Application Number Title Priority Date Filing Date
EP11004539.0A Not-in-force EP2530387B1 (en) 2011-06-03 2011-06-03 A cooking oven including an apparatus for detecting the three-dimensional shape of food stuff on a food stuff carrier
EP17165684.6A Withdrawn EP3220058A1 (en) 2011-06-03 2011-06-03 A cooking oven including an apparatus for detecting the three-dimensional shape of food stuff on a food stuff carrier

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP17165684.6A Withdrawn EP3220058A1 (en) 2011-06-03 2011-06-03 A cooking oven including an apparatus for detecting the three-dimensional shape of food stuff on a food stuff carrier

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11156367B2 (en) 2020-01-21 2021-10-26 Haier Us Appliance Solutions, Inc. Oven appliance with an adjustable camera assembly
US11408611B2 (en) 2020-01-21 2022-08-09 Haier Us Appliance Solutions, Inc. Oven appliance with an adjustable camera assembly

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Publication number Priority date Publication date Assignee Title
DE102013102293A1 (en) * 2013-03-07 2014-09-11 Rational Ag Method of detecting food
EP2930433B1 (en) * 2014-04-07 2022-01-12 Whirlpool EMEA S.p.A. Oven comprising a scanning system
US9933165B2 (en) 2014-04-07 2018-04-03 Whirlpool Emea S.P.A. Oven comprising a camera
DE102014210672A1 (en) 2014-06-05 2015-12-17 BSH Hausgeräte GmbH Cooking device with light pattern projector and camera
US9615007B2 (en) 2015-06-12 2017-04-04 Haier Us Appliance Solutions, Inc. Oven camera assembly

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Publication number Priority date Publication date Assignee Title
JP2001099615A (en) 1999-09-30 2001-04-13 Nippon Crucible Co Ltd Object distance measuring instrument and three- dimensional object shape measuring instrument
DE102006005874C5 (en) * 2005-05-11 2017-05-18 Carl Zeiss Automated Inspection GmbH Method for non-contact measurement
CN101059338B (en) 2007-05-16 2010-08-25 赵跃 Laser image measurement based coal coke oven carbonization chamber position detection method
DE202007007450U1 (en) * 2007-05-25 2007-08-02 BSH Bosch und Siemens Hausgeräte GmbH Retract absorption equipment e.g. for oven, has area having drawer-like lockable door and which is rigidly fastened to pair of sliding courses
EP2149755B1 (en) * 2008-07-30 2012-12-05 Electrolux Home Products Corporation N.V. Oven and method of operating the same

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None *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11156367B2 (en) 2020-01-21 2021-10-26 Haier Us Appliance Solutions, Inc. Oven appliance with an adjustable camera assembly
US11408611B2 (en) 2020-01-21 2022-08-09 Haier Us Appliance Solutions, Inc. Oven appliance with an adjustable camera assembly

Also Published As

Publication number Publication date
EP2530387A1 (en) 2012-12-05
EP3220058A1 (en) 2017-09-20

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