CN111058233B - Foreign matter detection method based on millimeter wave sensor and washing machine - Google Patents
Foreign matter detection method based on millimeter wave sensor and washing machine Download PDFInfo
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Abstract
The invention relates to the technical field of washing machines, in particular to a foreign matter detection method based on a millimeter wave sensor and a washing machine.A plurality of millimeter wave sensors are arranged in the washing machine, after a user puts clothes into the washing machine, the millimeter wave sensors are used for detecting foreign matters in the clothes, and distinguishing normal foreign matters from abnormal foreign matters, and when the abnormal foreign matters are not distinguished, the washing machine operates normally; when the abnormal foreign matter is identified, the alarm prompts the user, the display module of the washing machine displays the image of the foreign matter, and the user takes out the foreign matter. The invention can detect the foreign matters in the inner drum of the washing machine by the millimeter wave sensor, can efficiently and accurately detect whether the foreign matters are normal foreign matters such as zippers carried by the clothes or abnormal foreign matters not belonging to the clothes, can alarm and prompt a user after detecting the abnormal foreign matters, and can display the abnormal foreign matters to the user by imaging, thereby being convenient for the user to distinguish the foreign matters, having rapid identification process and high accuracy, and improving the use experience of the user.
Description
Technical Field
The invention relates to the technical field of washing machines, in particular to a foreign matter detection method based on a millimeter wave sensor and a washing machine.
Background
Washing machines are cleaning appliances that wash laundry using mechanical action of electricity generation, and are classified into two categories, a household category and a collection category, according to their rated washing capacities. The household washing machine mainly comprises a box body, a washing dehydration barrel (some washing and dehydration barrels are separated), a transmission and control system and the like, and some washing machines are also provided with a heating device. Common washing machines include pulsator washing machines and drum washing machines. Along with the improvement of the living standard of people, the washing machine becomes an indispensable household appliance for families, a user often has the trouble of forgetting to take out foreign matters (such as keys, coins, electronic products and the like) in a clothes pocket while enjoying the convenient clothes washing experience brought by the washing machine, and in the operation process of the washing machine, the articles are easily damaged, and if the foreign matters fall out of the pocket in the clothes washing process, the foreign matters also wear an inner barrel of the washing machine. Although the washing machine capable of detecting the foreign matters is available at present, the problem that the zipper, the button or other ornaments on the clothes can be detected as the foreign matters to generate false alarm is not considered in most of the existing washing machine foreign matter detection technologies.
Disclosure of Invention
In order to solve the above problems, the present invention provides a foreign object detection method based on a millimeter wave sensor, and a washing machine to which the foregoing foreign object detection method based on a millimeter wave sensor is applied.
The invention is realized by adopting the following scheme:
a foreign matter detection method based on millimeter wave sensor, set up multiple millimeter wave sensor in the washing machine, after users put the clothes into the washing machine, use the millimeter wave sensor to detect the foreign matter in the clothes, distinguish the normal foreign matter and unusual foreign matter, when not distinguishing the unusual foreign matter, then the washing machine operates normally; when the abnormal foreign matter is identified, the alarm prompts the user, the display module of the washing machine displays the image of the foreign matter, and the user takes out the foreign matter.
Further, the identification of whether the foreign matters are contained in the clothes refers to that the inner drum of the washing machine rotates under the state of not being filled with water, the motion state of the foreign matters is identified through the millimeter wave sensor, the foreign matters are identified as normal foreign matters when being in the regular motion state, and the foreign matters are identified as abnormal foreign matters when being in the irregular motion state.
Further, the foreign matter detection method based on the millimeter wave sensor comprises the following detailed steps:
step 1, a user puts clothes to be washed into an inner drum of a washing machine, and the washing machine is started;
step 2, starting a millimeter wave sensor to detect foreign matters, transmitting millimeter waves to the range of the inner cylinder of the washing machine by the millimeter wave sensor, and receiving reflected waves;
step 3, judging whether foreign matters exist in the clothes, if so, turning to step 4, and otherwise, turning to step 8;
step 4, the inner drum of the washing machine rotates in various modes under the state of not injecting water, and the millimeter wave sensor detects foreign matters and the motion state thereof;
step 5, judging whether the foreign matters are normal foreign matters or abnormal foreign matters, if so, turning to step 8, and if so, turning to step 6;
step 6, alarming to prompt a user, and feeding back the imaging condition of the abnormal foreign matters on a display module of the washing machine;
step 7, the user takes out abnormal foreign matters;
and 8, the washing machine operates normally and starts washing.
Further, the step 4 of rotating the inner drum of the washing machine in various ways includes changing the rotating direction and the rotating speed of the inner drum during the rotating process.
Further, the criterion for determining whether the foreign object is a normal foreign object or an abnormal foreign object in the step 5 is as follows: the foreign matters in regular motion state are defined as normal foreign matters when moving along with the clothes; the foreign matter is thrown out in the rotating process, and the foreign matter in the irregular motion state is defined as abnormal foreign matter.
Further, in step 6, an imaging process is performed according to the reflected wave received by the millimeter wave sensor.
Further, the normal foreign matter refers to an object that the clothing itself has, and the abnormal foreign matter refers to an object that does not belong to the clothing itself.
Further, the millimeter wave sensor is arranged on a closed door of the putting-in opening of the washing machine, and the millimeter wave sensors are arranged in a rectangular array.
A washing machine applies the foreign matter detection method based on the millimeter wave sensor.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the millimeter wave sensor is arranged in the washing machine, and the foreign matter detection is carried out through the clothes in the inner cylinder of the washing machine by the millimeter wave sensor, so that the foreign matter can be detected efficiently and accurately to be normal foreign matter such as a zipper carried by the clothes or abnormal foreign matter not belonging to the clothes, the alarm can be given to the user after the abnormal foreign matter is detected, the user is shown by an image, the foreign matter can be distinguished by the user conveniently, the identification process is rapid, the accuracy is high, the error alarm caused by the fact that the normal foreign matter carried by the clothes is judged to be the abnormal foreign matter is avoided.
Drawings
Fig. 1 is a flowchart of a foreign object detection method based on a millimeter wave sensor according to the present invention.
Detailed Description
To facilitate an understanding of the present invention for those skilled in the art, the present invention will be described in further detail below with reference to specific embodiments and accompanying drawings.
Referring to fig. 1, the invention provides a foreign matter detection method based on a millimeter wave sensor, and a washing machine applying the method is provided with the millimeter wave sensor, a control system, a central processing unit, an alarm and a display module. The method comprises the following steps that a plurality of millimeter wave sensors are arranged in the washing machine, after a user puts clothes into the washing machine, the millimeter wave sensors are used for detecting foreign matters in the clothes, normal foreign matters and abnormal foreign matters are distinguished, and when the abnormal foreign matters are not distinguished, the washing machine operates normally; when the abnormal foreign matter is identified, the alarm prompts the user, the display module of the washing machine displays the image of the foreign matter, and the user takes out the foreign matter. The normal foreign matter refers to an object (such as a zipper, a button and the like) owned by the clothes, and the abnormal foreign matter refers to an object not owned by the clothes.
The identification of whether the foreign matters are contained in the clothes refers to that the inner drum of the washing machine rotates under the state of not being filled with water, the motion state of the foreign matters is identified through the millimeter wave sensor, the foreign matters are identified as normal foreign matters when being in the regular motion state, and the foreign matters are identified as abnormal foreign matters when being in the irregular motion state.
The foreign matter detection method based on the millimeter wave sensor comprises the following detailed steps:
step 1, a user puts clothes to be washed into an inner drum of a washing machine, and the washing machine is started;
step 2, starting a millimeter wave sensor to detect foreign matters, transmitting millimeter waves to the range of the inner cylinder of the washing machine by the millimeter wave sensor, and receiving reflected waves;
step 3, judging whether foreign matters exist in the clothes, if so, turning to step 4, and otherwise, turning to step 8;
step 4, the inner drum of the washing machine rotates in various modes under the state of not injecting water, and the millimeter wave sensor detects foreign matters and the motion state thereof;
step 5, judging whether the foreign matters are normal foreign matters or abnormal foreign matters, if so, turning to step 8, and if so, turning to step 6;
step 6, alarming to prompt a user, and feeding back the imaging condition of the abnormal foreign matters on a display module of the washing machine;
step 7, the user takes out abnormal foreign matters;
and 8, the washing machine operates normally and starts washing.
The step 4 of rotating the inner drum of the washing machine in various ways comprises changing the rotating direction and the rotating speed of the inner drum in the rotating process. For example, when starting, the rotor rotates clockwise at a low speed, rotates for a period of time, gradually increases the rotation speed, or changes the rotation direction to counterclockwise. Or the rotating speed and the rotating direction of the inner drum are randomly changed in the rotating process, so that abnormal foreign matters are more easily separated from the clothes pockets, and the irregular motion state of the abnormal foreign matters is more obvious. No matter how the rotating mode is changed, the clothes carrying objects move along with the clothes all the time, and the moving state can be regularly circulated.
The standard for judging whether the foreign matter is normal foreign matter or abnormal foreign matter in the step 5 is as follows: the foreign matters in regular motion state are defined as normal foreign matters (such as buttons, zippers and the like) along with the movement of the clothes; the foreign matter is thrown out in the rotating process, and the foreign matter in the irregular motion state is defined as abnormal foreign matter. That is, when the inner drum of the washing machine rotates, no matter how the rotating mode is, the carried objects (such as buttons, zippers and the like) of the clothes rotate along with the clothes all the time, and the carried objects and the clothes keep a relatively static state and are in a regular motion state; the foreign matters put in the pocket or clamped in the middle of the clothes are easily thrown out of the pocket of the clothes in the rotating process, particularly when the rotating direction and the rotating speed are changed, and are randomly thrown in the washing drum to be in an irregular moving state.
And 6, imaging processing is carried out according to the reflected wave received by the millimeter wave sensor, and the imaging is transmitted to the display module after being processed by the central processing unit. The alarm can be given through a preset buzzer.
The millimeter wave sensors are arranged on the closed door of the putting-in opening of the washing machine, and the millimeter wave sensors are arranged in a rectangular array. The millimeter wave sensor comprises a transmitting terminal and a receiving terminal which are distributed in a rectangular array mode, the detection range capable of being covered is wide, and therefore the millimeter wave sensor only needs to be installed at a proper position, the millimeter wave sensor is not limited to be arranged on a closed door, the detection range of the sensor only needs to cover the whole inner cylinder, the sensor cannot rotate along with the roller, and meanwhile, the array arrangement mode is not limited to be rectangular. Compared with the common pulse radar, the pulse radar has the advantages that the pulse radars are uniformly distributed along the circumferential direction of the cylinder, the efficiency is improved, and the cost is reduced. The proper position can be reasonably selected according to different designs of the washing machine, for example, the position is arranged in a glass bowl of a closed door of a clothes input opening, so that the detection range covers the whole inner drum. Millimeter wave sensor is to washing machine inner tube within range transmission millimeter wave, because the millimeter wave all has very strong penetrability to the clothing of all kinds of materials, can not receive the influence of clothing itself almost, meets other when existing in the clothes pocket or mix with and the clothing between other article when the millimeter wave of launching, will take place to reflect back to millimeter wave sensor's receiving terminal, and millimeter wave sensor can carry out the formation of image processing with the back wave received, shows the shape that is detected article through display module.
The invention also provides a washing machine and a foreign matter detection method based on the millimeter wave sensor.
According to the invention, the millimeter wave sensor is arranged in the washing machine, and the foreign matter detection is carried out through the clothes in the inner cylinder of the washing machine by the millimeter wave sensor, so that the foreign matter can be detected efficiently and accurately to be normal foreign matter such as a zipper carried by the clothes or abnormal foreign matter not belonging to the clothes, the alarm can be given to the user after the abnormal foreign matter is detected, the user is shown by an image, the foreign matter can be distinguished by the user conveniently, the identification process is rapid, the accuracy is high, the error alarm caused by the fact that the normal foreign matter carried by the clothes is judged to be the abnormal foreign matter is avoided.
In the description of the present invention, it is to be understood that the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings and are only for convenience in describing the present invention and simplifying the description, but are not intended to indicate or imply that the indicated devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, e.g., as meaning permanently attached, removably attached, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
While the invention has been described in conjunction with the specific embodiments set forth above, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications, and variations that fall within the scope of the included claims.
Claims (6)
1. A foreign matter detection method based on a millimeter wave sensor is characterized in that a plurality of millimeter wave sensors are arranged in a washing machine, after a user puts clothes into the washing machine, the millimeter wave sensors are used for detecting foreign matters in the clothes, normal foreign matters and abnormal foreign matters are distinguished, and when the abnormal foreign matters are not distinguished, the washing machine operates normally; when the abnormal foreign matter is identified, an alarm is given to prompt a user, meanwhile, the display module of the washing machine displays the image of the foreign matter, and the user takes out the foreign matter; the identification of whether the foreign matters are contained in the clothes refers to that the inner drum of the washing machine rotates under the state of not being filled with water, the motion state of the foreign matters is identified through the millimeter wave sensor, the foreign matters are identified as normal foreign matters when being in the regular motion state, and the foreign matters are identified as abnormal foreign matters when being in the irregular motion state; the foreign matter detection method based on the millimeter wave sensor comprises the following detailed steps:
step 1, a user puts clothes to be washed into an inner drum of a washing machine, and the washing machine is started;
step 2, starting a millimeter wave sensor to detect foreign matters, transmitting millimeter waves to the range of the inner cylinder of the washing machine by the millimeter wave sensor, and receiving reflected waves;
step 3, judging whether foreign matters exist in the clothes, if so, turning to step 4, and otherwise, turning to step 8;
step 4, the inner drum of the washing machine rotates in various modes under the state of not injecting water, and the millimeter wave sensor detects foreign matters and the motion state thereof;
step 5, judging whether the foreign matters are normal foreign matters or abnormal foreign matters, if so, turning to step 8, and if so, turning to step 6;
step 6, alarming to prompt a user, and feeding back the imaging condition of the abnormal foreign matters on a display module of the washing machine;
step 7, the user takes out abnormal foreign matters;
step 8, the washing machine operates normally and starts washing;
the standard for judging whether the foreign matter is normal foreign matter or abnormal foreign matter in the step 5 is as follows: the foreign matters in regular motion state are defined as normal foreign matters when moving along with the clothes; the foreign matter is thrown out in the rotating process, and the foreign matter in the irregular motion state is defined as abnormal foreign matter.
2. The foreign object detection method based on the millimeter wave sensor according to claim 1, wherein the washing machine drum in step 4 is rotated in various ways including changing the rotation direction and the rotation speed of the drum during the rotation.
3. The foreign object detection method based on a millimeter wave sensor according to claim 1, wherein in said step 6, an imaging process is performed based on the reflected wave received by the millimeter wave sensor.
4. The millimeter wave sensor-based foreign object detection method according to claim 1, wherein the normal foreign object is an object that the laundry itself has, and the abnormal foreign object is an object that does not belong to the laundry itself.
5. The foreign matter detection method based on the millimeter wave sensor as claimed in claim 1, wherein the millimeter wave sensor is disposed on a closed door of the input port of the washing machine, and the plurality of millimeter wave sensors are arranged in a rectangular array.
6. A washing machine characterized by applying the foreign matter detection method based on the millimeter wave sensor according to any one of claims 1 to 5.
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| CN201915257U (en) * | 2010-12-15 | 2011-08-03 | 南京乐金熊猫电器有限公司 | Washing machine with vision sensor |
| EP3235944A1 (en) * | 2016-04-20 | 2017-10-25 | Herbert Kannegiesser GmbH | Method and device for inspecting laundry items |
| CN107447442A (en) * | 2017-08-31 | 2017-12-08 | 深圳市盛路物联通讯技术有限公司 | A kind of alarm method and smart machine based on image recognition technology |
| CN108103725A (en) * | 2018-01-08 | 2018-06-01 | 杨天牧 | A kind of washing machine and the not washable object detecting method and system for washing machine |
| EP3453794A1 (en) * | 2017-08-23 | 2019-03-13 | Beijing Xiaomi Mobile Software Co., Ltd. | Foreign matter recognition method and device |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201915257U (en) * | 2010-12-15 | 2011-08-03 | 南京乐金熊猫电器有限公司 | Washing machine with vision sensor |
| EP3235944A1 (en) * | 2016-04-20 | 2017-10-25 | Herbert Kannegiesser GmbH | Method and device for inspecting laundry items |
| EP3453794A1 (en) * | 2017-08-23 | 2019-03-13 | Beijing Xiaomi Mobile Software Co., Ltd. | Foreign matter recognition method and device |
| CN107447442A (en) * | 2017-08-31 | 2017-12-08 | 深圳市盛路物联通讯技术有限公司 | A kind of alarm method and smart machine based on image recognition technology |
| CN108103725A (en) * | 2018-01-08 | 2018-06-01 | 杨天牧 | A kind of washing machine and the not washable object detecting method and system for washing machine |
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