CN113287973B - Dust collector plugging degree determination method and system based on rotating speed compensation analysis - Google Patents
Dust collector plugging degree determination method and system based on rotating speed compensation analysis Download PDFInfo
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- CN113287973B CN113287973B CN202110471139.4A CN202110471139A CN113287973B CN 113287973 B CN113287973 B CN 113287973B CN 202110471139 A CN202110471139 A CN 202110471139A CN 113287973 B CN113287973 B CN 113287973B
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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
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
- A47L9/19—Means for monitoring filtering operation
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Abstract
The invention discloses a method and a system for judging the degree of blockage of a dust collector based on rotation speed compensation analysis, in particular to the field of dust collectors, and mainly comprises the following steps: under the condition of constant current, respectively acquiring a first rotating speed compensation curve corresponding to each plugging degree under constant voltage and a second rotating speed compensation curve corresponding to each voltage value under constant plugging degree; performing data analysis according to the first curve and the second curve to obtain a rotating speed compensation overflow point; acquiring a first plugging judgment function before the rotational speed compensation overflowing according to the rotational speed compensation overflowing point and a corresponding curve, and acquiring a second plugging judgment function after the rotational speed compensation overflowing; and acquiring the real-time working voltage of the dust collector under the condition of constant current, and acquiring the degree of the blockage of the dust collector through a blockage judging function. The invention can obtain the current plugging degree, thereby reminding a user of cleaning or replacing the plugging port in time and avoiding the reduction of working efficiency caused by overlarge plugging degree.
Description
Technical Field
The invention relates to the field of dust collectors, in particular to a method and a system for judging the degree of a blocked opening of a dust collector based on rotation speed compensation analysis.
Background
The dust collector generally used in the market is generally composed of five parts, namely a power part, a filtering system, a functional part, a protective measure and an accessory, and the filtering system of the existing dust collector generally adopts a HEPA filter screen which is made of a high-efficiency filtering material. When the dust collector is used daily, fine dust is inevitably blocked in a part of the ventilation opening (namely the filter screen), so that the suction force of the dust collector is reduced. Conventional cleaners take this into account and therefore add a speed compensation decision to their control logic, but do not have more detailed data indicating the current degree of blockage.
Meanwhile, although the motor of the dust collector can perform rotation speed compensation when the blockage occurs, the influence on the voltage duty ratio is different along with the change of the voltage and the change of the blockage degree, the rotation speed compensation overflow is probably caused, and the difficulty is increased for judging the blockage degree again.
Disclosure of Invention
Based on the problems, the invention provides a dust collector plugging degree judging method based on rotation speed compensation analysis, which takes the conditions of rotation speed compensation overflow and how to correctly judge the plugging degree under the conditions into consideration, and comprises the following steps:
s1: under the condition of constant current, respectively acquiring a first rotating speed compensation curve corresponding to each plugging degree under constant voltage and a second rotating speed compensation curve corresponding to each voltage value under constant plugging degree;
s2: performing data analysis according to the first curve and the second curve, judging whether a rotation speed compensation overflow point exists, if so, extracting the rotation speed compensation overflow point and entering the next step;
s3: acquiring a first plugging judgment function before the rotational speed compensation overflowing according to the rotational speed compensation overflowing point and a corresponding curve, and acquiring a second plugging judgment function after the rotational speed compensation overflowing;
s4: and acquiring the real-time working voltage of the dust collector under the condition of constant current, and acquiring the degree of the blockage of the dust collector through a blockage judging function.
Further, the first blockage determination function is:
T＝(P+U*Ki+K)*Kj，U＜U0；
wherein T is the degree of plugging, P is the current rotation speed compensation, U is the real-time working voltage, and U is0In order to compensate the voltage corresponding to the overflow point, Ki is a compensation coefficient after the overflow is compensated, Kj is a compensation coefficient before the overflow is compensated, and K is a constant. Further, the second blockage determination function is:
T＝(P+U)*Ki，U>U0；
wherein T is the degree of plugging, P is the current rotational speed compensation, U is the real-time working voltage, and U is0Ki is a compensation coefficient after compensation overflow in order to compensate the voltage corresponding to the overflow point.
Further, in step S1, the plugging degree under the constant voltage is gradually increased from the preset plugging lower limit value to the preset plugging upper limit value at the preset plugging interval, and the voltage under the constant plugging degree is increased from the preset voltage lower limit value to the preset voltage upper limit value at the preset voltage amplitude.
Further, in step S2, the data is analyzed, and the degree of plugging is negatively correlated with the rotational speed compensation, and the voltage is positively correlated with the rotational speed compensation.
The invention also provides a system for judging the degree of blockage of the dust collector based on the rotational speed compensation analysis, which comprises the following components:
the data acquisition module is used for acquiring a first rotating speed compensation curve corresponding to each plugging degree under constant voltage and a second rotating speed compensation curve corresponding to each voltage value under constant plugging degree under the condition of constant current;
the data analysis module is used for carrying out data analysis according to the first curve and the second curve and extracting the existing rotating speed compensation overflow points;
the function analysis module is used for acquiring a first blockage judgment function before the rotation speed compensation overflow and a second blockage judgment function after the rotation speed compensation overflow according to the rotation speed compensation overflow point and the corresponding curve;
and the plugging determination module is used for acquiring the real-time working voltage of the dust collector under the condition of constant current and acquiring the plugging degree of the dust collector through a plugging determination function.
Further, the first blockage determination function is:
T＝(P+U*Ki+K)*Kj，U＜U0；
wherein T is the degree of plugging, P is the current rotational speed compensation, U is the real-time working voltage, and U is0In order to compensate the voltage corresponding to the overflow point, Ki is a compensation coefficient after the overflow is compensated, Kj is a compensation coefficient before the overflow is compensated, and K is a constant.
Further, the second blockage determination function is:
T＝(P+U)*Ki，U>U0；
wherein T is the degree of plugging, P is the current rotational speed compensation, U is the real-time working voltage, and U is0Ki is a compensation coefficient after compensation overflow in order to compensate the voltage corresponding to the overflow point.
Further, the degree of plugging under the constant voltage is gradually increased to a preset plugging upper limit value from a preset plugging lower limit value at preset plugging intervals, and the voltage under the constant plugging degree is increased to the preset voltage upper limit value from a preset voltage lower limit value at a preset voltage amplitude.
Further, the data analysis module analyzes the data to obtain that the plugging degree is in negative correlation with the rotation speed compensation, and the voltage is in positive correlation with the rotation speed compensation.
Compared with the prior art, the invention at least has the following beneficial effects:
(1) according to the method and the system for judging the degree of the blockage of the dust collector based on the rotational speed compensation analysis, the compensation overflow point is extracted through analyzing the relation among the voltage, the degree of the blockage and the rotational speed compensation, so that the blockage judging functions before and after overflow can be respectively obtained;
(2) according to the real-time working voltage and the corresponding plugging judgment function, the current plugging degree can be obtained, so that a user can be reminded of cleaning or replacing the plugging in time, and the reduction of the working efficiency caused by overlarge plugging degree is avoided;
(3) the real-time plugging degree of the dust collector can be obtained, and the method can be used for follow-up research on the relation between the plugging degree and the overall power of the dust collector, so that the optimal plugging degree range can be obtained according to the research result, the dust collector can operate at the optimal efficiency in the using process, and the energy consumption is reduced.
Drawings
FIG. 1 is a method step diagram of a method and system for determining a degree of vacuum cleaner clogging based on rotational speed compensation analysis;
FIG. 2 is a system structure diagram of a method and system for determining the degree of clogging of a vacuum cleaner based on rotational speed compensation analysis;
FIG. 3 is a schematic diagram of voltage-rotation speed compensation;
fig. 4 is a schematic diagram of the relationship between the degree of clogging and the rotational speed compensation.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
Example one
The invention takes the rotating speed compensation of the power system into consideration when the existing dust collector only considers the blockage of the filtering system, but does not consider the voltage change and the blockage degree change, and the influences of the existing dust collector on the voltage duty ratio of the motor are different, so that the rotating speed compensation can overflow in some cases, and meanwhile, the existing dust collector lacks the correct prompt of the blockage degree, so that the transitional blockage of the HEPA in the filtering system is easily caused, and the efficiency of the dust collector is low. Based on the above problem, as shown in fig. 1, the present invention provides a method for determining a degree of vacuum cleaner clogging based on a rotational speed compensation analysis, comprising the steps of:
s1: under the condition of constant current, respectively acquiring a first rotating speed compensation curve corresponding to each plugging degree under constant voltage and a second rotating speed compensation curve corresponding to each voltage value under constant plugging degree;
s2: performing data analysis according to the first curve and the second curve, judging whether a rotation speed compensation overflow point exists, if so, extracting the rotation speed compensation overflow point and entering the next step;
s3: acquiring a first plugging judgment function before the rotational speed compensation overflowing according to the rotational speed compensation overflowing point and a corresponding curve, and acquiring a second plugging judgment function after the rotational speed compensation overflowing;
s4: and acquiring the real-time working voltage of the dust collector under the condition of constant current, and acquiring the degree of the blockage of the dust collector through a blockage judging function.
This embodiment describes step S1 of the present invention with a specific set of data, and it should be noted that the current is kept constant throughout the test in order to control the experimental variables.
As shown in fig. 3, firstly, we keep the radius of the ventilation opening unchanged at 3.5mm (simulating the situation that the degree of blockage only remains at 3.5mm ventilation radius), then obtain the rotation speed compensation data of the voltage which is adjusted from 9V (the lower limit value of the preset voltage, the normal working voltage of the dust collector) to 12V (the upper limit value of the preset voltage, the highest working voltage of the dust collector) by the step distance of 0.5V, and make a second curve of the rotation speed compensation (fig. 3). From the curve, it can be seen that the voltage and the rotation speed compensation are in a negative correlation overall, the rotation speed compensation is not changed before the voltage rises to 9.5V, however, the curve has a significant transition when the voltage is 9.5V, and the rotation speed compensation change rate is abrupt compared with the case when the voltage is lower than 9.5V. That is, after the voltage is greater than 9.5V, the rotation speed compensation of the motor is in a downward trend with a certain slope, however, before the voltage rises to 9.5V, the rotation speed compensation tends to be unchanged (the rotation speed compensation value P is 60 in the embodiment), that is, the rotation speed compensation is considered to be in an overflow state before the voltage reaches 9.5V.
Then, the relationship analysis between the plugging degree and the rotation speed compensation is performed, as shown in fig. 4, under the condition that the voltage is kept unchanged at 12V, the size of the plugging is gradually changed, the rotation speed compensation data under the conditions of 4.5mm (the preset plugging lower limit value, the lowest passable radius in the plugging state), 5.5mm, 6.5mm, 7.5mm, 8.5mm, 9.5mm and 15mm (the preset plugging upper limit value, the passable radius in the non-plugging state) are sequentially tested, and a first curve of the rotation speed compensation is prepared (fig. 4). From this curve we can see that the size of the orifice is inversely related to the speed compensation, i.e. at constant pressure the larger the radius of the vent, the smaller the compensation parameter.
According to the data, the graph and the analysis result, it can be easily seen that, under the working condition described in the embodiment, when the voltage is lower than 9.5V, the rotation speed compensation of the dust collector overflows. Based on this, through many experiments, obtain under the constant current, under each voltage state, the data of stifled degree gradual change, carry out statistical analysis to these data, obtain the voltage, the relation formula of rotational speed compensation and stifled degree, be promptly stifled mouthful decision function, wherein, the first stifled mouthful decision function when voltage is less than 9.5V is:
T＝(P+U*Ki+K)*Kj，U＜U0；
wherein T is the degree of plugging, P is the current rotational speed compensation, U is the real-time working voltage, and U is0In order to compensate the voltage corresponding to the overflow point, Ki is a compensation coefficient after the overflow is compensated, Kj is a compensation coefficient before the overflow is compensated, and K is a constant.
The second blockage determination function for voltages above 9.5V is:
T＝(P+U)*Ki，U>U0；
wherein T is the degree of plugging, P is the current rotational speed compensation, U is the real-time working voltage, and U is0Ki is a compensation coefficient after compensation overflow in order to compensate the voltage corresponding to the overflow point.
It should be noted that, for obtaining the coefficients Ki and Kj and the constant K in the function for determining the plugging, a person skilled in the art can completely obtain the coefficients by self-learning through a corresponding algorithm by substituting the obtained data and the graph into operation software such as MATLAB and the like according to the implementation, and therefore, the details of obtaining the coefficients are not described in this embodiment.
Based on the plugging judgment function, the dust collector can judge the plugging degree of the filtering system after acquiring the working voltage of the power system (motor) of the dust collector, so that a user can clean the dust collector or replace spare parts in time.
In a preferred embodiment, the obtained blockage judging function is further subjected to data analysis by using the integral power consumption and the cleaning efficiency of the motor so as to obtain a lower limit value of the blockage degree under the condition of the optimal working efficiency of the dust collector. Therefore, the user can be prompted to process the dust collector in time when the plugging degree reaches the lower limit value, and the best cleaning efficiency of the dust collector can be kept in the using process.
Example two
In order to better understand the technical content of the present invention, the present embodiment explains the present invention by the form of system structure, as shown in fig. 2, a system for determining the degree of clogging of a vacuum cleaner based on rotational speed compensation analysis comprises:
the data acquisition module is used for acquiring a first rotating speed compensation curve corresponding to each plugging degree under constant voltage and a second rotating speed compensation curve corresponding to each voltage value under constant plugging degree under the condition of constant current;
the data analysis module is used for carrying out data analysis according to the first curve and the second curve and extracting the existing rotating speed compensation overflow points;
the function analysis module is used for acquiring a first blockage judgment function before the rotation speed compensation overflow and a second blockage judgment function after the rotation speed compensation overflow according to the rotation speed compensation overflow point and the corresponding curve;
and the plugging determination module is used for acquiring the real-time working voltage of the dust collector under the condition of constant current and acquiring the plugging degree of the dust collector through a plugging determination function.
Further, the first blockage determination function is:
T＝(P+U*Ki+K)*Kj，U＜U0；
wherein T is the degree of plugging, P is the current rotational speed compensation, U is the real-time working voltage, and U is0In order to compensate the voltage corresponding to the overflow point, Ki is a compensation coefficient after the overflow is compensated, Kj is a compensation coefficient before the overflow is compensated, and K is a constant.
Further, the second blockage determination function is:
T＝(P+U)*Ki，U>U0；
wherein T is the degree of plugging, P is the current rotational speed compensation, U is the real-time working voltage, and U is0Ki is a compensation coefficient after compensation overflow in order to compensate the voltage corresponding to the overflow point.
Further, the degree of plugging under the constant voltage is gradually increased to a preset plugging upper limit value from a preset plugging lower limit value at preset plugging intervals, and the voltage under the constant plugging degree is increased to the preset voltage upper limit value from a preset voltage lower limit value at a preset voltage amplitude.
Further, the data analysis module analyzes the data to obtain that the plugging degree is in negative correlation with the rotation speed compensation, and the voltage is in positive correlation with the rotation speed compensation.
In summary, according to the dust collector blockage degree determination method and system based on the rotational speed compensation analysis, compensation overflow points are extracted through analysis of the relationship among the voltage, the blockage degree and the rotational speed compensation, and therefore the blockage determination functions before and after overflow can be obtained respectively. According to the real-time working voltage and the corresponding plugging judgment function, the current plugging degree can be obtained, so that a user can be timely reminded of cleaning or replacing the plugging, and the reduction of the working efficiency caused by the overlarge plugging degree is avoided.
Meanwhile, the real-time blocking degree of the dust collector is used for the follow-up research of the relation between the blocking degree and the overall power of the dust collector, so that the optimal blocking degree range can be obtained according to the research result, the dust collector can operate at the optimal efficiency in the using process, and the energy consumption is reduced.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
Moreover, descriptions of the present invention as relating to "first," "second," "a," etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating a number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Claims (10)
1. A dust collector blockage degree judging method based on rotation speed compensation analysis is characterized by comprising the following steps:
s1: under the condition of constant current, respectively acquiring a first rotating speed compensation curve corresponding to each plugging degree under constant voltage and a second rotating speed compensation curve corresponding to each voltage value under constant plugging degree;
s2: performing data analysis according to the first curve and the second curve, judging whether a rotation speed compensation overflow point exists, if so, extracting the rotation speed compensation overflow point and entering the next step;
s3: acquiring a first plugging judgment function before the rotational speed compensation overflowing according to the rotational speed compensation overflowing point and a corresponding curve, and acquiring a second plugging judgment function after the rotational speed compensation overflowing;
s4: and acquiring the real-time working voltage of the dust collector under the condition of constant current, and acquiring the degree of the blockage of the dust collector through a blockage judging function.
2. The method for determining the degree of clogging of a vacuum cleaner based on a rotational speed compensation analysis according to claim 1, wherein the first clogging determination function is:
T＝(P+U*Ki+K)*Kj，U<U0；
wherein T is the degree of plugging, P is the current rotational speed compensation, U is the real-time working voltage, and U is0In order to compensate the voltage corresponding to the overflow point, Ki is a compensation coefficient after the overflow is compensated, Kj is a compensation coefficient before the overflow is compensated, and K is a constant.
3. The method for determining a clogging degree of a vacuum cleaner based on a rotational speed compensation analysis according to claim 2, wherein the second clogging determination function is:
T＝(P+U)*Ki，U>U0；
wherein T is the degree of plugging, P is the current rotational speed compensation, U is the real-time working voltage, and U is0Ki is a compensation coefficient after compensation overflow in order to compensate the voltage corresponding to the overflow point.
4. The method for determining a blockage degree of a vacuum cleaner according to claim 1, wherein in step S1, the blockage degree under constant voltage is gradually increased from a preset lower limit value to a preset upper limit value at preset blockage intervals, and the voltage under constant blockage degree is increased from the preset lower limit value to the preset upper limit value at a preset voltage.
5. The method for determining the degree of vacuum cleaner blockage according to the rotational speed compensation analysis of claim 1, wherein the degree of blockage is negatively correlated to the rotational speed compensation and the voltage is positively correlated to the rotational speed compensation, obtained after the data analysis in step S2.
6. A dust collector blockage degree judging system based on rotation speed compensation analysis is characterized by comprising:
the data acquisition module is used for acquiring a first rotating speed compensation curve corresponding to each plugging degree under constant voltage and a second rotating speed compensation curve corresponding to each voltage value under constant plugging degree under the condition of constant current;
the data analysis module is used for carrying out data analysis according to the first curve and the second curve and extracting the existing rotating speed compensation overflow points;
the function analysis module is used for acquiring a first blockage judgment function before the rotation speed compensation overflow and a second blockage judgment function after the rotation speed compensation overflow according to the rotation speed compensation overflow point and the corresponding curve;
and the plugging determination module is used for acquiring the real-time working voltage of the dust collector under the condition of constant current and acquiring the plugging degree of the dust collector through a plugging determination function.
7. A rotation speed compensation analysis-based dust collector clogging degree determining system as claimed in claim 6, wherein the first clogging determining function is:
T＝(P+U*Ki+K)*Kj，U<U0；
wherein T is the degree of plugging, P is the current rotational speed compensation, U is the real-time working voltage, and U is0In order to compensate the voltage corresponding to the overflow point, Ki is a compensation coefficient after the overflow is compensated, Kj is a compensation coefficient before the overflow is compensated, and K is a constant.
8. The system for determining a clogging degree of a vacuum cleaner based on a rotational speed compensation analysis according to claim 7, wherein the second clogging determination function is:
T＝(P+U)*Ki，U>U0；
wherein T is the degree of plugging, P is the current rotational speed compensation, U is the real-time working voltage, and U is0Ki is a compensation coefficient after compensation overflow in order to compensate the voltage corresponding to the overflow point.
9. The system for determining the degree of vacuum cleaner blockage according to claim 6, wherein the degree of vacuum cleaner blockage is gradually increased from a preset lower limit value to a preset upper limit value at preset intervals, and the voltage at the lower limit value is increased from the preset lower limit value to the preset upper limit value at a preset voltage.
10. The system of claim 6, wherein the data analysis module analyzes the data to obtain a degree of blockage, the degree of blockage is negatively correlated to the rotational speed compensation, and the voltage is positively correlated to the rotational speed compensation.
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| JP2627893B2 (en) * | 1987-04-30 | 1997-07-09 | 光洋精工株式会社 | Control device for radial magnetic bearing |
| US7178410B2 (en) * | 2004-03-22 | 2007-02-20 | Cleanalert, Llc | Clogging detector for air filter |
| US8961695B2 (en) * | 2008-04-24 | 2015-02-24 | Irobot Corporation | Mobile robot for cleaning |
| GB2515084B (en) * | 2013-06-13 | 2015-10-28 | Dyson Technology Ltd | Surface cleaning appliance |
| DE102015214036A1 (en) * | 2015-07-24 | 2017-01-26 | BSH Hausgeräte GmbH | Device for controlling a cleaning of a filter unit for vacuum cleaners |
| CN107432715B (en) * | 2017-09-08 | 2021-03-23 | 广东威灵电机制造有限公司 | Dust collector, motor and control method and control device of motor |
| CN208447356U (en) * | 2017-12-28 | 2019-02-01 | 佛山市思为斯电子有限公司 | Motor variable-frequency speed-regulating driving device and domestic stirrer |
| CN112294191B (en) * | 2019-08-01 | 2022-05-06 | 尚科宁家(中国)科技有限公司 | Dirt blockage detection method for dust box filter screen of sweeper and sweeper |
| CN112056985B (en) * | 2020-08-07 | 2022-03-29 | 江苏美的清洁电器股份有限公司 | Cleaning device and suction port monitoring method, monitoring device and controller thereof |
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