CN115584610A - Washing machine clothes weighing and unbalance detection integrated fusion method - Google Patents

Washing machine clothes weighing and unbalance detection integrated fusion method Download PDF

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Publication number
CN115584610A
CN115584610A CN202211368034.7A CN202211368034A CN115584610A CN 115584610 A CN115584610 A CN 115584610A CN 202211368034 A CN202211368034 A CN 202211368034A CN 115584610 A CN115584610 A CN 115584610A
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CN
China
Prior art keywords
washing machine
displacement
clothes
weighing
displacement sensor
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Pending
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CN202211368034.7A
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Chinese (zh)
Inventor
李兵强
王东亨
赵逸云
邢化玲
周素莹
袁学兵
赵冬冬
张峰
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Northwestern Polytechnical University
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Northwestern Polytechnical University
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Priority to CN202211368034.7A priority Critical patent/CN115584610A/en
Publication of CN115584610A publication Critical patent/CN115584610A/en
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/30—Control of washing machines characterised by the purpose or target of the control 
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/16—Imbalance
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/18—Condition of the laundry, e.g. nature or weight
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/42—Safety arrangements, e.g. for stopping rotation of the receptacle upon opening of the casing door
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/02—Characteristics of laundry or load
    • D06F2103/04—Quantity, e.g. weight or variation of weight
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/58—Indications or alarms to the control system or to the user

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)

Abstract

The invention relates to the technical field of washing machines, in particular to an integrated fusion method for detecting the weighing and unbalance of clothes of a washing machine, which comprises the technical scheme of a pulsator washing machine and a drum washing machine, and solves the problems of low precision and larger error caused by the influence of load eccentricity and the position of the gravity center of a load when 1 displacement sensor is used for measurement. Through a plurality of displacement sensor, can real-time detection urceolus all directions shake the offset, avoid producing the emergence of the condition of striking or washing machine beating because of load eccentricity is serious, further promoted washing machine's security. The invention combines the clothes weighing and the unbalance detection, uniformly uses the position sensor for detection, optimizes the structure of the washing machine, avoids the waste of the space volume of the washing machine, reduces the cost by function reuse, and simultaneously provides convenience for the maintenance of the washing machine.

Description

Washing machine clothes weighing and unbalance detection integrated fusion method
Technical Field
The invention relates to the technical field of washing machines, in particular to a method for detecting weighing and unbalance of clothes of a washing machine.
Background
The washing machine is a common household appliance, can conveniently and quickly wash articles for daily use such as clothes, bedding and the like, brings convenience to the life of people, and at present, mainly comprises a pulsator washing machine and a drum washing machine.
In the washing process of the existing washing machine, a step of weighing clothes is provided before water is fed. The purpose of weighing clothes in a washing machine is to automatically set a proper water inflow amount, a proper detergent amount, a proper washing time and the like according to the weight of the clothes by weighing and knowing the weight of the clothes. The precision of the washing machine for weighing clothes is improved, the utilization efficiency of the washing machine for water resources can be effectively improved, the washing effect can be guaranteed, and the washing machine is low-carbon and environment-friendly.
Meanwhile, the washing machine also needs to perform laundry unbalance detection during operation. The impeller type washing machine drives the impeller to rotate by the motor, the clothes continuously roll up and down along with water, and the inner drum rotates in the box body during dehydration so as to spin-dry the clothes in the inner drum. When the inner cylinder rotates at a high speed, a larger eccentric moment can be generated due to unbalance, so that the outer cylinder is driven to vibrate, and when the vibration of the outer cylinder exceeds the maximum vibration absorption of a vibration absorption system of the washing machine, the outer cylinder can collide against the box body at the moment. In the case of a drum type washing machine, when the vibration amplitude of the outer tub caused by the rotation of the inner tub is too large, the overall unbalance of the washing machine may jump, and noise may be generated, which may affect the user's experience, or even cause malfunction or damage.
Specifically, as for the weighing method of the washing machine, there are methods of detecting the rotation speed of the motor under different loads or parameters such as time, current and voltage required for reaching a certain rotation speed, for example, patents with publication numbers of CN1350086A, CN111945377A, CN1566458A and CN109853188A, but the above methods have low weighing precision and are difficult to meet the system requirements. Further, there are methods of weighing clothes by attaching a resistor or a force sensor, such as patent publications CN111945377A, CN104727090A and CN 169019291A, but the above methods are expensive.
As for the method for detecting the unbalance of the washing machine, there are methods for installing a pressure sensor or an acceleration sensor in the prior art, such as patents with publication numbers CN102733142A, CN105274775A and CN102733142A, and methods for measuring distance or obtaining a torque fluctuation value by laser, such as patents with publication numbers CN108486827A, CN104963169A and CN105155206A, but the above methods all have high cost; there are also methods of indirectly detecting the bus current fluctuation of the driving motor, such as US5070565, etc., but the above methods have limited accuracy and cannot accurately detect or even predict the imbalance state.
The patent with publication No. CN 169019291A, which is structurally similar to this patent, uses one of the air damping type elastic supporting shock absorbers with a displacement sensor to weigh the clothes for the drum-type washing machine, but because the displacement and the weight of the supporting shock absorber in the configuration state have a nonlinear mapping relation and are easily influenced by the position where the clothes are placed, the method has the problems of low precision and large error, and the displacement sensor has a single application function and does not exert the maximum efficiency.
The methods applied above have the problems of low precision and large error, or the problems of complex system and high cost, and are difficult to meet the requirements of the washing machine on intellectualization and high performance.
Disclosure of Invention
In order to overcome the shortcomings of the prior art, the invention provides a method for combining clothes weighing and unbalance detection by using a displacement sensor.
It should be noted that the washing machine described in the present invention includes both a pulsator washing machine equipped with 4 displacement sensors and a drum washing machine equipped with 2 or more than 2 displacement sensors, and in the present invention, "a plurality of displacement sensors" refers to the number of displacement sensors installed in different washing machines.
The technical scheme adopted by the invention for solving the technical problem comprises the following steps:
step 1, turning on a power supply of a washing machine, starting the washing machine to enter a standby state, and obtaining displacement generated by a displacement sensor positioned at the bottom end of a suspender or in a supporting shock absorber after clothes are put in;
step 2, judging whether the displacement generated by the displacement sensor reaches a set displacement threshold of the weight of the clothes, if the displacement exceeds the displacement threshold, indicating that the clothes put into the washing machine are overweight, and needing to be put into the washing machine again; if the displacement does not exceed the displacement threshold, substituting the displacement generated by the plurality of displacement sensors into a weight formula for measuring the load weight: d = R 1 ×D S1 +R 2 ×D S2 +…+R n ×D Sn +D 0 Wherein R is 1 ～R n As weight factor of the weighing stage, D S1 ～D Sn Respectively displacement of a plurality of displacement sensors, D is the weighted displacement of the plurality of displacement sensors, D 0 Parameters related to friction and initial state;
step 3, obtaining the weighted displacement of the displacement sensor, and determining a closest load weight by contrasting a displacement-load weight relation curve stored in the washing machine;
step 4, determining the water inflow of the washing machine according to the obtained load weight data, and rotating the motor after the water inflow is finished;
step 5, in the operation process of the washing machine, every period of time T S The displacement of a plurality of displacement sensors is collected once, and the collected data is substituted into a weight formula: d = T 1 ×D S1 +T 2 ×D S2 +…+T n ×D Sn +D 1 Wherein, T 1 ～T n As weight coefficients for the imbalance detection phase, D 1 Parameters related to friction and initial state;
step 6, obtaining the weighted displacement of the displacement sensor, comparing a displacement-outer cylinder amplitude relation curve stored in the washing machine, judging whether a threshold value of the outer cylinder amplitude is reached, and if the threshold value of the outer cylinder amplitude is not reached, continuing to operate the washing machine; if the vibration amplitude exceeds the threshold value, the washing machine automatically adjusts until the vibration amplitude is within the threshold value; if the adjustment is not successful, the washing machine sends out an alarm signal and stops running.
The invention has the beneficial effects that:
the invention avoids the problems of low precision and larger error caused by the influence of load eccentricity and load gravity center position (clothes position) when 1 displacement sensor is used for measurement, and greatly improves the accuracy of the measured clothes weight data by using a plurality of displacement sensors in a matching way and correlating the displacement sensors through corresponding weighting formulas.
According to the invention, through the plurality of displacement sensors, the vibration offset of the outer barrel in each direction can be detected in real time, so that the condition of impact or washing machine jumping caused by serious load eccentricity is avoided, and the safety of the washing machine is further improved.
The invention combines the clothes weighing with the unbalance detection, uniformly uses the position sensor for detection, optimizes the structure of the washing machine, avoids the waste of the space volume of the washing machine, reuses the functions, reduces the cost and simultaneously provides convenience for the maintenance of the washing machine.
The displacement sensor and the suspender or the supporting shock absorber are integrally designed and assembled, no extra space requirement is required, and the reliability is high.
Drawings
FIG. 1 is a flow chart of a method for detecting weighing and unbalance of laundry in a washing machine according to the present invention;
FIG. 2 is a structural view of a pulsator type washing machine according to the present invention;
FIG. 3 is a structural view of a drum type washing machine according to the present invention;
FIG. 4 is a schematic view of a boom with a displacement sensor according to the present invention;
FIG. 5 is a graph of displacement versus load weight for a displacement sensor;
FIG. 6 is a graph showing the relationship between the displacement of the displacement sensor and the amplitude of vibration of the outer cylinder.
Illustration of the drawings:
1. a washing machine box body; 2. an outer cylinder; 3. an inner barrel; 4. hanging feet; 5. a screw rod; 6. a connector; 7. a damper; 8. a compression spring; 9. a displacement sensor; 10. a lifting ring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Example one
Referring to fig. 2, the present invention provides a technical solution: a washing machine clothes weighing and unbalance detection integrated fusion method comprises the following steps: 4 suspenders with position sensors are respectively arranged at the left front position, the right rear position and the left rear position inside the washing machine, are connected with the box body 1 through 4 suspension feet and are connected with the outer barrel through 6 connectors. Fig. 4 is a schematic view of a suspender, wherein a damper 7 is arranged below a screw rod 5, a compression spring 8 for providing a shock absorption function is arranged below the damper 7, and a displacement sensor 9 (S1-S4) is arranged at the lowest part.
The suspension rod comprises a spring type, a hydraulic damping type and an air damping type, and can move correspondingly under the corresponding stress condition.
The displacement sensor can be inductive, capacitive, electromagnetic, eddy current, or potentiometer, and is not limited to specific implementations.
After clothes are put in, the barrel body can be displaced downwards due to the fact that the barrel body is subjected to weight, so that the interior of the hanging rod can be displaced through the 6-connector, displacement can be collected through the 9-displacement sensor at the moment, the collected values are weighted, the weight of the clothes put in the washing machine can be accurately determined by comparing a displacement-load weight relation curve, water inflow is further determined, and the clothes are washed by the motor in a rotating mode.
During the washing process, the washing machine is programmed to operate for a fixed time period T S The inner pair of 4 displacement sensors collects data once, then the real-time barrel vibration amplitude is obtained by contrasting a displacement-outer barrel vibration amplitude relation curve through weighting calculation, the washing machine is ensured to be in a normal operation state, and if the amplitude is too large, an alarm is given in time and the operation of the washing machine is stopped.
Example two
Referring to fig. 3,2 support dampers with position sensors and 2 suspension rods are respectively installed at four positions of the left lower, right upper and left upper inside the washing machine, and the two suspension rods at the upper part are connected with the box body 1 through 4 suspension legs and connected with the outer cylinder through 6 connectors. The two supporting shock absorbers below are connected with the box body 1 through a bearing seat and connected with the outer barrel through a connector 6.
It should be noted that the number of the supporting dampers having the position sensor installed therein in the drum type washing machine includes, but is not limited to, 2, and may be 3 or 4, and all fall within the scope of the present invention.
After clothes are put in, the barrel body can be displaced downwards due to the fact that the barrel body is subjected to weight, so that the inside of the supporting shock absorber can be displaced through the 6-connector, displacement can be collected through the 9-displacement sensor at the moment, weighting processing is conducted on collected values, the weight of the clothes put in the washing machine can be accurately determined by comparing displacement with a load weight relation curve, water inflow is further determined, the motor rotates, and the clothes are washed.
During the washing process, the washing machine is set by a program and is used for each fixed time period T S The method comprises the steps of collecting data of a plurality of displacement sensors once, then obtaining real-time barrel vibration amplitude by contrasting a displacement-outer barrel vibration amplitude relation curve through weighting calculation, ensuring that the washing machine is in a normal operation state, and timely alarming and stopping the operation of the washing machine if the amplitude is too large.
Although the present invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims (10)

1. The integrated fusion method for weighing clothes and detecting unbalance of the washing machine comprises a technical scheme of a pulsator washing machine and is characterized in that four hanging rods provided with position sensors are respectively arranged at four positions of the left front, the right back and the left back in the washing machine, are connected with a box body through hanging feet (4) and are connected with an outer barrel (2) through a connector (6).
2. A washing machine clothes weighing and unbalance detection integrated fusion method comprises a drum type washing machine technical scheme and is characterized in that a supporting shock absorber provided with a position sensor and two suspension rods are respectively arranged at the lower part and the upper part of the washing machine, and the two suspension rods at the upper part are connected with a box body through suspension feet (4) and are connected with an outer barrel (2) through a connector (6). The supporting shock absorber at the lower part is connected with the box body through a bearing seat and is connected with the outer barrel (2) through a connector (6).
3. An integrated method for weighing clothes and detecting unbalance of a washing machine as claimed in claim 2, wherein the number of the supporting dampers having the position sensor installed therein in the drum type washing machine includes but is not limited to two, and may be three or four.
4. An integrated method for weighing clothes and detecting imbalance in a washing machine as claimed in claim 2, wherein the hanger bar is not provided with a position sensor.
5. The washing machine clothes weighing and unbalance detection integrated fusion method according to claim 1, characterized in that the design scheme of the suspender is that a damper (7) is arranged below the screw rod (5), the connector (6) is positioned on the damper (7), a compression spring (8) for providing a shock absorption function is arranged below the damper (7), a displacement sensor (9) is arranged below the damper, and a hanging ring (10) for providing a connection function is arranged at the lowest part of the damper.
6. The integrated method for weighing clothes and detecting imbalance of a washing machine according to claim 2, wherein the design scheme of the supporting shock absorbers is that a screw rod (5) is arranged below the connector (6), a damper (7) is arranged below the screw rod (5), a compression spring (8) for providing a shock absorption function is arranged below the damper (7), a displacement sensor (9) is arranged below the compression spring, and a hanging ring (10) for providing a connection function is arranged at the lowest part of the compression spring.
7. An integrated method for washing machine clothes weighing and unbalance detection as claimed in claims 1-2, characterized in that said suspension rod/support shock absorber comprises spring type, hydraulic damping and air damping.
8. The integrated weighing and unbalance detection fusion method for laundry washing machines according to claims 1-6, characterized in that said displacement sensor (9) can be of inductive, capacitive, electromagnetic, eddy current, potentiometric type, without being limited to specific implementations.
9. The integrated method for weighing clothes and detecting imbalance of a washing machine as claimed in claims 1 to 8, wherein the power supply of the washing machine is turned on, the washing machine is started to enter a standby state, after the clothes are put in, the displacement generated by the displacement sensor positioned at the bottom end of the suspender or in the supporting damper is obtained, whether the displacement generated by the displacement sensor reaches the set displacement threshold value of the weight of the clothes is judged, if the displacement threshold value is exceeded, the clothes put in the washing machine are overweight, and the clothes need to be put in again; if the displacement threshold is not exceeded, substituting the displacement generated by the displacement sensors into a weight formula for measuring the load weight: d = R 1 ×D S1 +R 2 ×D S2 +…+R n ×D Sn +D 0 Wherein R is 1 ～R n As weight factor of the weighing stage, D S1 ～D Sn Respectively displacement of a plurality of displacement sensors, D is the weighted displacement of the plurality of displacement sensors, D 0 Are parameters related to friction and initial conditions. And obtaining the weighted displacement of the displacement sensor, determining the closest load weight by contrasting the corresponding relation curve of the displacement sensor and the load weight, determining the water inflow of the washing machine according to the obtained load weight data, and rotating the motor after the water inflow is finished.
10. The integrated method for weighing clothes and detecting unbalance as claimed in claim 9, wherein the displacement of the plurality of displacement sensors is collected at intervals during the operation of the washing machine, and the collected data is substituted into the weight formula: d = T 1 ×D S1 +T 2 ×D S2 +…+T n ×D Sn +D 1 Wherein, T 1 ～T n As weight coefficients for the imbalance detection phase, D 1 Obtaining the weighted displacement of the displacement sensor for parameters related to friction and an initial state, comparing a corresponding relation curve of the displacement sensor with the vibration amplitude of the outer cylinder, judging whether a threshold value of the vibration amplitude of the outer cylinder is reached, and if the threshold value of the vibration amplitude is not reached, continuing to operate the washing machine; if the vibration amplitude exceeds the threshold value, the washing machine automatically adjusts until the vibration amplitude is within the threshold value; if the adjustment is not successful, the washing machine sends out an alarm signal and stops running.
CN202211368034.7A 2022-11-03 2022-11-03 Washing machine clothes weighing and unbalance detection integrated fusion method Pending CN115584610A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211368034.7A CN115584610A (en) 2022-11-03 2022-11-03 Washing machine clothes weighing and unbalance detection integrated fusion method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211368034.7A CN115584610A (en) 2022-11-03 2022-11-03 Washing machine clothes weighing and unbalance detection integrated fusion method

Publications (1)

Publication Number Publication Date
CN115584610A true CN115584610A (en) 2023-01-10

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Country Status (1)

Country Link
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