EP3427630B1 - Methode zur authomatische feststellung der bewegung eines objekts im spülraum eines geschirrspülers - Google Patents

Methode zur authomatische feststellung der bewegung eines objekts im spülraum eines geschirrspülers Download PDF

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Publication number
EP3427630B1
EP3427630B1 EP18182619.9A EP18182619A EP3427630B1 EP 3427630 B1 EP3427630 B1 EP 3427630B1 EP 18182619 A EP18182619 A EP 18182619A EP 3427630 B1 EP3427630 B1 EP 3427630B1
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EP
European Patent Office
Prior art keywords
objects
image
dishwashing machine
washing area
group
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EP18182619.9A
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English (en)
French (fr)
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EP3427630A1 (de
Inventor
Aldo Fumagalli
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Candy SpA
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Candy SpA
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0021—Regulation of operational steps within the washing processes, e.g. optimisation or improvement of operational steps depending from the detergent nature or from the condition of the crockery
    • A47L15/0028—Washing phases
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0049—Detection or prevention of malfunction, including accident prevention
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/006—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control using wireless communication between internal components of the machine
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/14—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber
    • A47L15/18—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber with movably-mounted spraying devices
    • A47L15/22—Rotary spraying devices
    • A47L15/23—Rotary spraying devices moved by means of the sprays
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4219—Water recirculation
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4295—Arrangements for detecting or measuring the condition of the crockery or tableware, e.g. nature or quantity
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0063—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control using remote monitoring or controlling of the dishwasher operation, e.g. networking systems
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/04—Crockery or tableware details, e.g. material, quantity, condition
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/24—Spray arms status, e.g. detection of spray arm rotation
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/30—Variation of electrical, magnetical or optical quantities
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/26—Indication or alarm to the controlling device or to the user
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/30—Regulation of machine operational steps within the washing process, e.g. performing an additional rinsing phase, shortening or stopping of the drying phase, washing at decreased noise operation conditions
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/32—Stopping or disabling machine operation, including disconnecting the machine from a network, e.g. from an electrical power supply

Definitions

  • the present disclosure relates to a method of automatically assessing the displacement of an object in a washing area of a dishwashing machine, as defined in the preamble of claim 1.
  • the present disclosure also relates to a dishwashing machine configured to carry out the method of automatically assessing the displacement of an object in a washing area, as defined in the preamble of claim 10.
  • the present disclosure further relates to a system composed of a dishwashing machine and a user-handheld portable device configured to carry out the method of automatically assessing the displacement of an object in a washing area, as defined in the preamble of claim 13.
  • Dishwashing machines are known in the art, which are equipped with optical devices such as still cameras, video cameras or camcorders, located in a fixed or moving position relative to the washing chamber to check the dishware load or degree of cleaning.
  • optical devices such as still cameras, video cameras or camcorders
  • WO2016008699 and US 2012/0138092 disclose such dishwashing machines.
  • Document DE 10 2015 102694 A1 describes a method for determining the rotational speed of a spray arm of a dishwashing machine bv means of camera images, which are processed and then compared with each other to calculate the rotational speed of the spray arm as a function of the result of the image comparison.
  • the object of the present invention is to provide a method, a dishwashing machine and a system for assessing whether the objects in the washing zone have changed their position, to avoid the above described prior art problems.
  • One embodiment of the present invention provides a method and a corresponding dishwashing machine as well as a system composed of a dishwashing machine and a user-handheld portable device that can be used to identify the displacement of objects inside the washing zone of a dishwashing machine, in view of taking actions and restoring the conditions for proper positioning of the obj ects, thereby reducing the need to wash part of the dishware and/or repeat the washing cycle, leading to water, detergent and power consumption.
  • numeral 1 designates a dishwashing machine, e.g. of built-in type, located in a kitchen cabinet, the finishing panels being omitted for better illustration of the internal volumes.
  • This dishwashing machine 1 comprises a washing area 2 and a door 3 adapted to be closingly associated with the washing area 2.
  • the dishwashing machine 1 identifies a base 1A, usually designed to accommodate the mechanisms/devices required to carry out the specific operations of the machine 1.
  • the washing area 2 defines the volume in which the objects S, 5 and 7 to be monitored are arranged.
  • the washing area 2 is defined by a plurality of walls, such as the base wall 2A, the side walls 2B and 2C, the ceiling 2D and the bottom wall 2E and identifies an upper portion 2' and a lower portion 2".
  • upper/lower shall be intended to be related to a proper installation and operation condition of the dishwashing machine 1.
  • the term upper designates the portion that is farther from the base 1A
  • the term lower designates the portion that is closer to the base 1A.
  • the door 3 can be manually operated by the user and/or be power-assisted and has the purpose of hermetically closing the washing area 2 to avoid leakage of washing liquids while the cleaning program is being executed.
  • object S, 5 and 7 shall be intended hereinafter as:
  • the impellers 5 are well known in the art and will not be further described herein. It shall be simply noted that one or preferably two impellers may be located in the washing area. Namely, the first impeller is located in the lower area 2' proximate to the base 1A and the other is located in the upper area 2", preferably in the lower portion of the upper area.
  • a dish rack 21 is situated in the lower area 2' and/or the upper area 2", and has the purpose to accommodate the dishware S, in a manner that is known in the art and will not be further described herein.
  • the dishwashing machine 1 comprises a dispenser 6 whose shape defines a volume adapted to accommodate the products required to clean the objects, particularly the dishware.
  • these products may be detergent powders or tabs, but also a gel.
  • the dispenser 6 may comprise one or more compartments, each designed to receive a particular washing product.
  • the dispenser 6 comprises a door 7 which is configured to move between a closed position and a position allowing free access to the internal volume of the dispenser 6.
  • the door 7 is moved between the closed position and the open position by being mechanically and/or electrically controlled by the control unit 4, once the door 3 of the dishwashing machine 1 has been closed.
  • the dispenser 6 is placed on the door 3, and particularly on the side facing the washing area 2, at a predetermined height. More particularly, the dispenser 6 is housed within the thickness of the door 3.
  • the dishwashing machine 1 comprises a control unit 4, e.g. situated within the thickness of the door 3, which has a motherboard with the usual electrical and electronic devices located thereon, including a CPU, a number of I/O ports for receiving and transmitting data, a memory bank, a portion whereof being designed to permanently store at least one cleaning program.
  • a control unit 4 e.g. situated within the thickness of the door 3, which has a motherboard with the usual electrical and electronic devices located thereon, including a CPU, a number of I/O ports for receiving and transmitting data, a memory bank, a portion whereof being designed to permanently store at least one cleaning program.
  • the control unit 4 is a unit configured to control and supervise the operating functions of the dishwashing machine 1.
  • the memory of the control unit 4 is designed to also permanently store a database in which the contours of the objects S, 5 and 7 are identified by means of appropriate parameters.
  • the objects S, 5 and 7 are advantageously identified in the database by one or more digital parameters that can represent the contour of the objects S, 5 and 7.
  • digital parameters that can represent the contour of the objects S, 5 and 7.
  • the so-called mathematics that represent these devices are already known to the manufacturer of the dishwashing machine 1, but the dishware S is designed to be identified using a particular imaging process.
  • the dishwashing machine 1 comprises a pump, for example arranged in the base 1A, which is adapted to be connected, in a manner that is known to a skilled person and will not be described herein, to a water mains supply.
  • this pump is controlled by a solenoid valve and has the purpose of withdrawing water from the mains and supply it to the impellers 5 arranged in the washing area 2.
  • the dishwashing machine 1 comprises one or more optical devices 8 that can capture digital images of the washing area 2.
  • the optical devices 8 are arranged with their optical system facing the washing area 2.
  • each wall 2A, 2B, 2C, 2D and/or 2E of the washing area 2 can accommodate one or more of the aforementioned optical devices 8 in its thickness,
  • a housing 2F for each optical device 8 is provided for this purpose.
  • the housing 2F defines a volume adapted to accommodate its respective optical device and a light-transparent covering panel 8A preferably covers the optical system of the optical device.
  • This covering panel 8A is made, for example, of glass or plastic or materials having similar technical properties.
  • the covering panel 8A is preferably arranged substantially flush with or slightly projecting out of the surface of the wall 2A, 2B, 2C, 2D or 2E.
  • the housing 2F formed in the thickness of the door 3 of the dishwashing machine 2. As shown in this Figure 5 , all the electrical and electronic parts required for the operation of the optical device 8 are accommodated in the housing 2F.
  • the purpose of the optical devices 8 in the dishwashing machine 1 is to capture still and/or sequential two-dimensional digital images at predetermined capturing speeds, usually in the visible range of the electromagnetic spectrum, such as a single frame, or a burst of images, or an seamless stream of images of the washing area 2 and particularly of the objects S, 5, 7 in this washing area.
  • the optical device 8 has a field of view 8B, allowing acquisition of images of the objects S, 5 and/or 7 that fall within such field of view.
  • optical devices 8 are in signal communication with the control unit 4 via the I/O ports of the latter to send the acquired data to the control unit 4.
  • the optical devices 8 are embodied, for example, by a still camera and/or a video camera. These devices are known in the art and will not be described in further detail herein.
  • the still camera and/or the video camera as used in the dishwashing machine 1 preferably comply with the technical specifications for operation with water, i.e. the still camera and/or the video camera comply with the standard IP x(1-8).
  • the housing 2F in which the optical devices 8 are placed is configured to be watertight, e.g. using sealing techniques.
  • the dishwashing machine 1 comprises a user interface 9, i.e. the control and monitoring interface through which the user may control and manage the operation and functions of the dishwashing machine.
  • the user interface 9 is in signal communication with the control unit 4 via the I/O ports of the latter to receive the data processed by the CPU of the control unit.
  • the user interface 9 is a screen 23 which is integrated in the dishwashing machine 1 to be visible by a user during normal operation and/or with the addition of a buzzer (not shown).
  • the user interface 9 is integrated in the door 3 with such an orientation that the screen faces out of the washing area 2.
  • the screen of the user interface 9 is configured to display light indications, text messages and/or single or continuous images.
  • the images displayed on screen may be the images of the washing area 2 and the objects therein provided acquired by the optical devices 8.
  • the screen may be a touch (i.e. touch sensitive) screen.
  • the user interface 9 comprises one or more analog buttons and/or a combination of analog/digital controls and/or a combination of analog/digital controls and a screen, the latter being, for instance, a touchscreen.
  • the buzzer of the user interface 9 has the purpose of providing acoustic warnings of any situations or operating conditions to the user.
  • the dishwashing machine 1 comprises a radio transmitting/receiving apparatus, which is configured to provide signal communication with a wired and/or wireless network.
  • the wireless network may be an Internet protocol-based network that uses a WI-FI connection or a Bluetooth-based WPAN (Wireless Personal Area Network).
  • the user interface 9 also comprises a portable device (i.e. a device that can be carried and held in a user's hand) 22 such as a smartphone, a tablet, a PC or similar instruments.
  • a portable device i.e. a device that can be carried and held in a user's hand
  • a smartphone such as a smartphone, a tablet, a PC or similar instruments.
  • the user interface 9 comprises both the usual control interface of the dishwashing machine 1 and the screen of a portable device 22.
  • the portable device 22 has its own radio transmitting/receiving apparatus, which is configured to establish a signal communication with the radio transmitting/receiving apparatus of the dishwashing machine 1.
  • the portable device 22 is not only able to communicate with the control unit 4 of the dishwashing machine 1, but also to connect through the Internet network, for example via a GSM infrastructure, to one or more remote servers 24 to carry out storage, saving and/or data processing operations on the images that have been captured by the optical devices 8.
  • the portable device 22 is adapted to connect either directly with the dishwashing machine 1 and with the Internet network via the GSM infrastructure.
  • a system 25 is provided which comprises the dishwashing machine 1, the portable device 22 which are in signal communication with each other via the GSM network, a WI-FI connection and/or a WPAN.
  • the screen of the portable device 22 is configured to display light indications, text messages and/or images captured by the optical devices 8.
  • the database in which the contours of the objects S, 5 and 7, are identified through appropriate parameters may be stored at least partially, preferably entirely, in the memory of the portable device 22, in a mass storage of the server and/or be distributed in the memories of the dishwashing machine 1, the portable device 22 and the server 23.
  • control unit 4 is in signal communication with the user interface 9 (provided either as the screen of the dishwashing machine 1 or as a screen of the portable device) to transmit changes of the operating state of the dishwashing machine 1.
  • a change of the operating state is intended to designate any change of the function of the dishwashing machine 1 resulting from the displacement of one or more objects S, 5 or 7 to a position that cannot ensure proper operation, i.e. to a state in which one or more problems occur.
  • these problems particularly include:
  • the identification of one or more of the aforementioned problems does not affect the execution of the cleaning program, i.e. the cleaning program that has been set will be completed in spite of the detected problem/s.
  • the cleaning program is designed to be stopped either automatically, i.e. by the control unit 4, or manually, i.e. by the user. This situation is restored as soon as the user solves the detected problems, for the initially selected program to be completed.
  • the cleaning program may be designed to be changed, or modified automatically by the control unit 4, to account for the detected problem.
  • the cleaning program being executed may be changed by the control unit 4 by increasing the water supply time (i.e. duration) to compensate for the detected problem.
  • the visual indications that can be displayed on the screen of the user interface 9 in addition to the usual indications known in the art, can provide warning of possible changes of the operating states of the dishwashing machine 1.
  • the method of automatically assessing the displacement of an object S, 5 and/or 7, i.e. a dishware item and/or of a component of the dishwashing machine 1 in a washing area 2 includes a step 10 of providing a plurality of objects S, 5, 7 in the washing area 2.
  • the method steps as described hereinbelow i.e. the steps of acquiring, processing, filtering, comparing and dividing may be carried out either directly by the CPU of the control unit 4 or more preferably by the CPU of the portable user device via the Internet connection with the CPU of remote servers for analysis and data processing.
  • the method comprises a step of acquiring a first digital image 11 representative of the plurality of objects S, 5 and/or 7.
  • This acquisition step is carried out through the or optical device/s 8 located in the washing area 2.
  • the first digital image is preferably acquired after closing the door 3 but before starting the cleaning program.
  • control unit 4 supervises the acquisition step by controlling the or optical device/s 8 once the door 3 has been closed before the start of the cleaning program.
  • the method comprises a step 12 of digitally processing the first acquired image 11 to obtain a first processed image 12A; wherein said first processed image 12A defines a first contour for each object of said plurality of objects S, 5 and/or 7.
  • control unit 4 and/or the portable user device starts a process in which the first image 11 is processed to define the contour of each of the objects S, 5 and/or 7 in the washing area 2, which may be either dishware and/or components of the dishwashing machine.
  • the first processed image 12A represents the initial image, i.e. an image of the initial arrangement of the objects S, 5 and/or 7 whose displacement is to be assessed.
  • the method comprises a filtering step 13 that, based on the first contour of each object, filters the first processed image 12a to obtain a first filtered image 13A.
  • This first filtered image 13a defines a first group of objects 13B, this first group of objects representing the objects 5 and/or 7 of the plurality of objects S, 5 and/or 7 that are movable relative to the washing area 2.
  • the contours of the objects in the first processed image 12A may be distinguished to obtain a first filtered image 13A that only contains the contours of the objects that are movable relative to the washing area 2.
  • the first group of objects 13b comprises the objects that are expected to move relative to the washing area 2 during the cleaning program, being these objects components of the dishwashing machine 1.
  • These objects of the first group of objects 13b are, for example, the impeller/s 5 and the door 7 of the dispenser 6.
  • the impeller/s 5 must move relative to the washing area to introduce an uniform flow of water and detergent products into the washing area 2
  • the movement is a rotary movement about a central point, which is typically the center of gravity.
  • the door 7 of the dispenser 6 is required to move from the closed configuration to the open configuration.
  • the filtering step 13 may be implemented, for example, by comparing the contours that have been identified with the contours stored in a database that resides in the memory of the control unit 4 or in the memory of the portable user device or in a server remote from both the dishwashing machine 1 and the user hand-held device.
  • the contours of the impellers 5 and/or the door 7 of the dispenser 6 are known to the manufacturer of the dishwashing machine 1 and can be stored beforehand and directly compared with those in the first processed image 12A.
  • the other contours in the first processed image 12A i.e. the contours that are not part of the first group 13B, belong to a second group of objects 13D which, as described below, defines the objects S that are stationary relative to the washing area 2.
  • the term objects that are stationary relative to the washing area 2 or movable relative to the washing area 2 is intended to indicate that:
  • the method comprises the step of acquiring a second image 14 representative of the first group of objects 13B once a first preset period of time T1 has elapsed from the start of a cleaning program.
  • this first period of time T1 must be greater than a few seconds, affording a check on whether the objects of the first group 13b have moved or are moving in the washing area 2.
  • this first period of time T1 is greater than three seconds and not greater than four minutes. During this interval, a check may be made on whether the impeller/s 5 are rotating and that the door 7 of the dispenser 6 has been actually opened.
  • the optical devices 8 that are preferably used to acquire the second image 14 are those placed in the lower portion 2' of the washing area 2.
  • the method comprises a step 15 of digitally processing the second acquired image 14 to obtain a second processed image 15A, wherein this second processed image 15A defines a second contour for each object of said first group of objects 13B.
  • the method comprises a step 16 of comparing the first filtered image 13A with the second processed image 15A to assess whether the first contour of each object of said first group of objects 13B coincides with the respective second contour and, if it does, notifying 16A a critical change-of-operating-state condition through the user interface 9.
  • control unit 4 will actuate the optical device/s 8 to acquire the second image 15A to check whether the contour of the objects of the first group of objects 13b has been moved or is moving.
  • control unit 4 can check whether they are moved, to indicate a first critical condition 16A through the user interface 9, if an obstacle blocks their movement.
  • the signal associated with the first critical condition 16A allows the user to learn through the interface 9 whether:
  • the cleaning program downstream from (or possibly at the same time as) the step of indicating the first critical condition 16A, the cleaning program is designed to proceed as expected, be changed in response to this first critical condition 16A that has been detected or stopped until the normal operating conditions will be restored.
  • the step of filtering 13 according to the first contour of each object can filter the first processed image 12a to additionally or alternatively obtain a second filtered image 13C, the second filtered image defining a second group of objects 13D.
  • This second group of objects 13D represents the objects S of the plurality of objects S, 5 and 7 that are stationary relative to the washing area 2.
  • the objects that are required to be stationary relative to the washing area 2 are the dishware S.
  • the method comprises a step of acquiring a third image 18 representative of the second group of objects once a second preset period of time T2 has elapsed from the start of the cleaning program.
  • this second period of time T2 must be greater than a few seconds, affording a check on whether the objects of the second group are still, i.e. do not move in the washing area 2.
  • this second period of time T2 is greater than one minute.
  • the optical devices 8 that are preferably used to acquire the third image 18 are those placed in the side walls 2B and 2C.
  • the method comprises the step 19 of digitally processing the third acquired image 18 to obtain a third processed image 19A, wherein this third processed image 19A defines a second contour for each object of said second group of objects 13D.
  • the method comprises a step 20 of comparing the second filtered image 13C with the third processed image 19A to assess whether the first contour of each object of the second group of objects 13B coincides with the respective second contour and, if it doesn't, notifying 20A a critical change-of-operating-state condition through the user interface 9.
  • the method includes repeating the steps 14, 15 and 16, namely acquiring the second image representative of the first group of objects 13B, once the first preset period of time T1 from the start of the cleaning program has elapsed, at regular or random intervals, to thereby provide a plurality of second images, spaced in time, representative of the position of the first group of objects 13B relative to the washing area 2.
  • a comparison may be made with the first filtered image 13A, to assess whether the first contour of each object of the first group of objects 13B coincides with the respective second contour and, if it does, notifying 16A the change-of-operating-state condition through the user interface 9.
  • control unit 4 instructs the optical device/s 8 to acquire additional second images 14, the acquisition occurring at regular or random intervals.
  • These second images 14 are processed to define the new contours of the objects.
  • These new contours are compared with the respective contours of the first filtered image 13A to assess whether a displacement has occurred. If the contours coincide, a change of the operating state is notified through the user interface 9.
  • the method comprises the same procedure for the second group of objects 13D, with the exception that a change of the operating state is notified if the new contours do not coincide with those of the second filtered image.
  • the method includes repeating the steps 18, 19 and 20 to assess, by a comparison with the second filtered image 13C, whether the first contour of each object of the second group of objects 13D coincides with the respective second contour and, if it doesn't, notifying 20A a second critical change-of-operating-state condition through the user interface 9.
  • the signal associated with the second critical condition 20A allows the user to learn through the interface 9 whether the dishware S have changed their position.
  • the cleaning program downstream from (or possibly at the same time as) the step of indicating the second critical condition 20A, the cleaning program is designed to proceed as expected, be changed in response to this second critical condition 20A that has been detected or stopped until the normal operating conditions will be restored.
  • the processing steps 12, 15 and 19 comprise a process through which the images 13A, 13C are divided, with a reference grid being placed thereon, to compare the grid with the respective grid of the images 15A and 19A acquired at later times.
  • an assessment may be made of whether the objects of the first group 13b have moved or the objects of the second group are still stationary relative to the washing area 2.
  • the comparison of the contour of an object that lies within a grid of the initial image with the corresponding grid of the next image in time allows appreciation of a possible displacement (or non-displacement) of the object being captured.
  • the method and the dishwashing machine 1 allow a change of the operating state of the machine to be notified through the user interface 9, allowing actions to be taken to restore the proper installation conditions of the object. This will reduce the need to wash part of the dishware and/or repeat the washing cycle, leading the water, detergent and power consumption.

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  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Washing And Drying Of Tableware (AREA)

Claims (12)

  1. Methode zur automatischen Feststellung der Bewegung eines Objektes (S, 5, 7) in einem Spülraum (2) eines Geschirrspülers (1), wobei der Geschirrspüler eine Tür (3) umfasst, die dazu ausgelegt ist, dem Spülraum (2) zugeordnet zu werden, um diesen zu schließen und die dazu konfiguriert ist, ein Reinigungsprogramm zu implementieren und in Signalkommunikation mit einer Benutzerschnittstelle (9) zu stehen, wobei die Methode folgende Schritte umfasst:
    - Bereitstellen (10) einer Vielzahl von Objekten (S, 5, 7) in dem Spülraum (2);
    - Erfassen eines ersten Digitalbildes (11), das für die Vielzahl von Objekten (S, 5, 7) repräsentativ ist;
    - digitale Verarbeitung (12) des ersten erfassten Bildes (11), um ein erstes verarbeitetes Bild (12A) zu erhalten; wobei das erste verarbeitete Bild (12A) eine erste Kontur für jedes Objekt der Vielzahl von Objekten (S, 5, 7) definiert;
    Filtern (13) des ersten verarbeiteten Bildes (12A) gemäß der ersten Kontur jedes Objekts, um ein erstes gefiltertes Bild (13A) zu erhalten, wobei das erste gefilterte Bild (13A) eine erste Gruppe von Objekten (13B) definiert, wobei die erste Gruppe von Objekten (13B) die Objekte (5, 7) der Vielzahl von Objekten (S, 5, 7) repräsentiert, die während des Reinigungsprogramms relativ zum Spülraum (2) bewegbar sind, wobei die erste Gruppe von Objekten (13B) mindestens eine Komponente des Geschirrspülers (1) ist;
    - Erfassen eines zweiten Digitalbildes (14), das für die erste Gruppe von Objekten (13B) repräsentativ ist, nachdem ein erster voreingestellter Zeitraum (T1) seit Beginn eines Reinigungsprogramms abgelaufen ist;
    - digitale Verarbeitung (15) des zweiten erfassten Bildes (14), um ein zweites verarbeitetes Bild (15A) zu erhalten, wobei das zweite verarbeitete Bild (15A) eine zweite Kontur für jedes Objekt der ersten Gruppe von Objekten (13B) definiert;
    - Vergleichen (16) des ersten gefilterten Bildes (13A) mit dem zweiten verarbeiteten Bild (15A), um festzustellen, ob die erste Kontur jedes Objekts der ersten Gruppe von Objekten (13B) mit der jeweiligen zweiten Kontur übereinstimmt, und wenn dies der Fall ist, Mitteilung einer ersten kritischen Änderung des Betriebszustandes (16A) über die Benutzerschnittstelle (9);
    - wobei die Methode durch folgende Schritte gekennzeichnet ist:
    - Filtern des ersten verarbeiteten Bildes gemäß der ersten Kontur jedes Objekts, (12A) um ein zweites gefiltertes Bild (13C) zu erhalten, wobei das zweite gefilterte Bild (13C) eine zweite Gruppe von Objekten (13D) definiert, wobei die zweite Gruppe von Objekten (13D) die Objekte der Vielzahl von Objekten (S, 5, 7) repräsentiert, die während des Reinigungsprogramms relativ zum Spülraum (2) fixiert sind;
    - Erfassen eines dritten Bildes (18), das für die zweite Gruppe von Objekten repräsentativ ist, nachdem ein zweiter voreingestellter Zeitraum (T2) seit Beginn eines Reinigungsprogramms abgelaufen ist;
    - digitale Verarbeitung (19) des dritten erfassten Bildes (18), um ein drittes verarbeitetes Bild (19A) zu erhalten, wobei das dritte verarbeitete Bild (19A) eine zweite Kontur für jedes Objekt der zweiten Gruppe von Objekten (13D) definiert;
    - Vergleichen (20) des zweiten gefilterten Bildes (13C) mit dem dritten verarbeiteten Bild (19A), um festzustellen, ob die erste Kontur jedes Objekts der zweiten Gruppe von Objekten (13D) mit der jeweiligen zweiten Kontur übereinstimmt und, wenn nicht, Mitteilung einer zweiten kritischen Änderung des Betriebszustands (20A) über die Benutzerschnittstelle (9).
  2. Methode wie in Anspruch 1 beansprucht, wobei der Schritt des Erfassens des ersten Digitalbildes (12) erfolgt, nachdem die Tür (3) geschlossen wurde und wenn das Reinigungsprogramm noch nicht gestartet wurde.
  3. Methode wie in Anspruch 1 beansprucht, umfassend das Wiederholen in regelmäßigen oder zufälligen Intervallen, nachdem ein erster voreingestellter Zeitraum (T1) seit Beginn eines Reinigungsprogramms abgelaufen ist; den Schritt des Erfassens eines zweiten Digitalbildes (14); die digitale Verarbeitung (15) des zweiten erfassten Bildes (14), um ein zweites verarbeitetes Bild (15A) zu erhalten, und Vergleichen (16) des ersten gefilterten Bildes (13A) mit dem zweiten verarbeiteten Bild (15A), um eine Vielzahl von zweiten, zeitlich beabstandeten Bildern zu erhalten, die für die Position der ersten Gruppe von Objekten (13B) relativ zum Spülraum (2) repräsentativ sind.
  4. Methode wie in Anspruch 1 beansprucht, umfassend das Wiederholen in regelmäßigen oder zufälligen Intervallen, nachdem der zweite voreingestellte Zeitraum (T2) seit Beginn eines Reinigungsprogramms abgelaufen ist; den Schritt des Erfassens eines dritten Digitalbildes (18); die digitale Verarbeitung (19) des dritten erfassten Bildes (18), um ein drittes verarbeitetes Bild (19A) zu erhalten, und Vergleichen (20) des zweiten gefilterten Bildes (13C) mit dem dritten verarbeiteten Bild (19A), um eine Vielzahl von dritten, zeitlich beabstandeten Bildern zu erhalten, die für die Position der zweiten Gruppe von Objekten (13D) relativ zum Spülraum (2) repräsentativ sind.
  5. Methode wie in Anspruch 1 beansprucht, wobei die erste Gruppe (13B) eine Komponente (5, 7) des Geschirrspülers umfasst, die zwischen der ersten und der zweiten Betriebsposition bewegbar ist.
  6. Methode wie in Anspruch 1 beansprucht, wobei die zweite Gruppe (13D) eine Vielzahl von Geschirrgegenständen (S) umfasst.
  7. Methode wie in irgendeinem der vorhergehenden Ansprüche 1 beansprucht, wobei die Verarbeitungsschritte (12, 15 und 19) ein Verfahren umfassen, durch den die ersten oder zweiten gefilterten Bilder (13A, 13C) auf ein Referenzraster gelegt werden, um ein solches Raster mit dem jeweiligen Raster des zweiten oder des dritten verarbeiteten Bildes (15A und 19A) zu vergleichen.
  8. Methode wie in Anspruch 1 beansprucht, wobei nach dem Schritt des Mitteilens des ersten kritischen Zustandes (16A) oder des zweiten kritischen Zustandes (20A), das Reinigungsprogramm gemäß dem ersten kritischen Zustand (16A) oder dem zweiten kritischen Zustand (20A) geändert wird, der mitgeteilt oder gestoppt wurde.
  9. Geschirrspüler, umfassend einen Spülraum (2) und eine Tür (3), die ausgelegt ist, dem Spülraum (2) zugeordnet zu werden, um diesen zu schließen; eine Steuereinheit (4) aufweisend einen Speicher mit einem darin gespeicherten Reinigungsprogramm; eine Pumpe, die ausgestaltet ist mit einem Hauptwasseranschluss verbunden zu werden, um Wasser aus dem Hauptanschluss zu entnehmen; ein oder mehrere in Fluidverbindung mit einer solchen Pumpe stehende Laufräder (5); einen Spender (6) aufweisend eine Klappe (7), die zur Bewegung zwischen einer geschlossenen und einer offenen Stellung konfiguriert ist; eine oder mehrere optische Vorrichtungen (8), welche Digitalbilder des Spülraums (2) erfassen können und eine Benutzerschnittstelle (9), wobei diese eine oder mehrere optische Vorrichtungen (8) und Benutzerschnittstelle (9) mit der Steuereinheit (4), sowie mit der Pumpe in Signalverbindung stehen, dadurch gekennzeichnet, dass er ein Programm umfasst, das in einem anderen Teil des Speichers residiert, der dazu konfiguriert ist, die Schritte, wie in irgendeinem der vorhergehenden Ansprüche von 1 bis 8 beansprucht auszuführen.
  10. Geschirrspülmaschine wie in Anspruch 9 beansprucht, wobei die Benutzerschnittstelle ein in die Geschirrspülmaschine integrierter Bildschirm (23) ist, wobei der Bildschirm (23) konfiguriert ist, um einen ersten kritischen Zustand (16A) und/oder einen zweiten kritischen Zustand (20A) aufgrund einer Änderung des Betriebszustands durch Warnleuchten, Texte und/oder Bilder anzuzeigen.
  11. Geschirrspülmaschine wie in Anspruch 9 beansprucht, wobei die Geschirrspülmaschine ein Funkübertragungsgerät umfasst und die Benutzerschnittstelle eine tragbare Vorrichtung (22) ist, aufweisend ein eigenes Funkübertragungsgerät, das dazu konfiguriert ist, eine Signalkommunikation mit dem Funkübertragungsgerät der Geschirrspülmaschine (2) herzustellen, um dadurch Daten zu empfangen, die für die Änderung des Betriebszustands repräsentativ sind, wobei das tragbare Gerät einen eigenen Bildschirm aufweist, der konfiguriert ist, um die Änderung des Betriebszustands durch Warnlichter, Meldungen und/oder Bilder anzuzeigen.
  12. System zur automatischen Feststellung der Bewegung eines Objekts (S, 5, 7) in einem Spülraum (2) einer Geschirrspülmaschine (1), umfassend:
    einen Geschirrspüler (1), umfassend einen Spülraum (2) und eine Tür (3), die ausgelegt ist, dem Spülraum (2) zugeordnet zu werden, um diesen zu schließen; eine Steuereinheit (4) aufweisend einen Speicher mit einem darin gespeicherten Reinigungsprogramm; eine Pumpe, die ausgestaltet ist mit einem Hauptwasseranschluss verbunden zu werden, um Wasser aus dem Hauptanschluss zu entnehmen; ein oder mehrere in Fluidverbindung mit einer solchen Pumpe stehende Laufräder (5); einen Spender (6) aufweisend eine Klappe (7), die konfiguriert ist, um sich zwischen einer geschlossenen Stellung und einer offenen Stellung zu bewegen; eine oder mehrere optische Vorrichtungen (8), die digitale Bilder des Spülraums (2) erfassen können und eine Benutzerschnittstelle (9), wobei die eine oder mehreren optischen Vorrichtungen (8) und die Benutzerschnittstelle (9) in Signalkommunikation mit der Steuereinheit (4), sowie mit der Pumpe stehen; und ein Sende-/Empfangsfunkgerät;
    - eine tragbare Vorrichtung (22), die für die Handhabung durch einen Benutzer ausgelegt ist, aufweisend ein eigenes Sende-/Empfangsfunkgerät, das zum Herstellen einer Signalkommunikation mit
    dem Sende-/Empfangsfunkgerät des Geschirrspülers konfiguriert ist; einen Bildschirm, der zum Anzeigen von Warnlichtern, Meldungen und/oder Bilder konfiguriert ist und einen Speicher, die dadurch gekennzeichnet ist, dass sie ein Programm umfasst, das in einem Teil des Speichers der tragbaren Benutzerhandvorrichtung (22) residiert, wobei das Programm dazu konfiguriert ist, die in irgendeinem der vorhergehenden Ansprüche von 1 bis 8 beanspruchten Schritte auszuführen, damit eine erste oder zweite kritische Änderung des Betriebszustands (16A, 20A) auf der Schnittstelle (9) und/oder dem Bildschirm der tragbaren Benutzerhandvorrichtung angezeigt wird.
EP18182619.9A 2017-07-13 2018-07-10 Methode zur authomatische feststellung der bewegung eines objekts im spülraum eines geschirrspülers Active EP3427630B1 (de)

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