An intelligent water level monitoring system for a washing machine

Abstract

The application discloses an intelligent water level monitoring system for a washing machine, and belongs to the field of washing machine water level monitoring, solves the problems of how to intelligently control the water level of the washing machine and how to accurately display the remaining actual total washing time of the washing machine, and the man-machine interactive interface displays the washing remaining time and the water level of the washing machine, and the user operates the setting of the washing machine on the man-machine interactive interface; the data acquisition module collects the real-time resonant frequency in the pressure sensor; the washing control center stores and analyzes and processes the target standard water level, the target standard total washing time and the resonant frequency value; the alarm module performs buzzer alarm on the obtained alarm information; the application can monitor the water filling or water discharging stage of the washing machine in real time, can timely inform the user to process when the water level fault occurs, can acquire the remaining actual total washing time in real time, and avoids the inaccurate display of the remaining actual total time in the prior art.

Description

Technical Field

[0001] This invention belongs to the field of washing machine water level monitoring, specifically an intelligent water level monitoring system for washing machines. Background Technology

[0002] With the development of science and technology, the advent of washing machines has greatly reduced the burden of washing clothes and provided great convenience to people's lives. Among these features, intelligent monitoring of the water level in the washing machine allows for timely handling of water level malfunctions.

[0003] Currently, water level monitoring in washing machines mainly relies on water level sensors to simply mark the water level, without actively detecting or automatically alarming for abnormal water levels. Furthermore, the remaining total washing time is inaccurate.

[0004] Therefore, this invention proposes an intelligent water level monitoring system for washing machines. Summary of the Invention

[0005] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes an intelligent water level monitoring system for washing machines, which solves the problems of how to intelligently control the water level of the washing machine and how to accurately display the remaining actual total washing time.

[0006] To achieve the above objectives, an intelligent water level monitoring system for a washing machine is proposed according to an embodiment of the first aspect of the present invention, comprising: a human-machine interface, a data acquisition module, a washing control center, and an alarm module;

[0007] The human-machine interface is used to display the remaining washing time and water level of the washing machine. The human-machine interface is also used by the user to operate the settings of the washing machine and send the obtained target standard water level and target standard total washing time to the washing control center.

[0008] The data acquisition module is used to acquire the real-time resonant frequency in the pressure sensor and send it to the washing control center;

[0009] The washing control center is used to store and analyze the acquired target standard water level, target standard total washing time, and resonant frequency values. The washing control center includes a storage unit, a timing unit, and a data processing unit. The data processing unit processes the acquired data as follows:

[0010] Step S1: Extract data from the data storage unit;

[0011] Step S2: Subtract the timing points of the continuously acquired resonant frequencies to obtain the interval time, and preset the interval time threshold;

[0012] During the water injection phase, the water injection frequency change value AZ is obtained by subtracting the previously obtained resonant frequency from the resonant frequency obtained each time; a water injection frequency change value threshold AZs is preset; if AZ is greater than AZs, an alarm message for water injection failure is sent to the fault module.

[0013] During the drainage phase, the drainage frequency change value AP is obtained by subtracting the previously obtained resonant frequency from the acquired resonant frequency each time; the preset threshold for the drainage frequency change value is APs; if AP is less than APs, an alarm message for drainage failure is sent to the fault module.

[0014] During the water injection or drainage phase, if the interval time for obtaining the resonant frequency is greater than the preset interval time threshold, an alarm message for water injection or drainage failure will be sent to the fault module.

[0015] Step S3: If the water injection or drainage stage in step S2 is normal, then obtain the water level corresponding to the resonant frequency according to the water level-frequency standard curve, obtain the water level change during the interval of the water injection or drainage stage, and thus obtain the water level rise rate or water level fall rate per unit time.

[0016] The remaining actual total washing time is calculated based on the different types of standard water filling time or standard drainage time provided by the washing machine, the current real-time water filling level or real-time drainage level, the target standard water filling level or target standard drainage level, the target standard total washing time, and the time period, and then sent to the human-machine interface for display in real time.

[0017] The alarm module is used to sound an alarm when the alarm information is acquired.

[0018] Furthermore, users can configure the washing machine settings, including power on / off settings and washing functions.

[0019] Furthermore, the data acquisition module is equipped with an air chamber connected to the washing machine drum, an air hose, and a pressure sensor. The pressure sensor acquires the air pressure value by connecting the air chamber and the air hose inside the washing machine drum. The pressure sensor contains a parallel resonant circuit, and the inductance in the parallel resonant circuit is directly proportional to the air pressure value, according to the parallel resonant frequency formula. Obtain the resonant frequency.

[0020] Furthermore, the data storage unit is used to store the acquired target standard water level, target standard total washing time, and resonant frequency value.

[0021] Furthermore, the timing unit is used to time the washing process of the washing machine.

[0022] Furthermore, during the water injection phase, the data processing unit acquires the water injection frequency change value AZ; if AZ is less than or equal to AZs, no fault information is sent to the alarm module.

[0023] During the drainage phase, the data processing unit acquires the drainage frequency change value AP; if AP is greater than or equal to APs, no fault information is sent to the alarm module.

[0024] During the water injection or drainage phase, if the calculated interval time is less than or equal to the preset interval time threshold, no fault information will be sent to the alarm module.

[0025] Furthermore, if the current phase is water injection, the data processing unit obtains the water level rise rate VS per unit time;

[0026] The data processing unit marks the standard water injection time for different types of water injection stages as Ti, the real-time water injection level as HZ, and the target standard water injection level as HS; the target standard total washing time is marked as TZ, and the time period from the start of the timing unit to the current time point is marked as T; where i represents the number of different types of water injection stages of the washing machine; i = 1, 2, ... i;

[0027] According to the calculation formula Obtain the remaining actual total washing time TS and send it to the human-machine interface for display in real time.

[0028] Furthermore, if the current stage is drainage, the data processing unit obtains the water level drop rate VX per unit time;

[0029] The data processing unit marks the standard water filling time for different types of drainage stages as Tj, the real-time drainage water level as HP, and the target standard drainage water level as 0; it marks the target standard total washing time as TZ, and the time period from the start of the timing unit to the current time point as T; where j represents the number of different types of drainage stages of the washing machine; j = 1, 2, ..., j;

[0030] According to the calculation formula Obtain the remaining actual total washing time TS and send it to the human-machine interface for display in real time.

[0031] Compared with the prior art, the beneficial effects of the present invention are:

[0032] 1. This invention displays the remaining washing time and water level of the washing machine through a human-machine interface, allowing the user to operate the washing machine settings via the interface. The acquired target standard water level and target standard total washing time are sent to the washing control center. The data acquisition module collects the real-time resonant frequency from the pressure sensor and sends it to the washing control center. The washing control center stores and analyzes the acquired target standard water level, target standard total washing time, and resonant frequency value. The washing control center includes a storage unit, a timing unit, and a data processing unit. Specifically, the data processing unit subtracts the timing points of continuously acquired resonant frequencies to obtain the interval time, with a preset interval time threshold. During the water filling phase, the resonant frequency is subtracted from the previously acquired resonant frequency to obtain the water filling frequency change value. If the change value is greater than a preset threshold, an alarm message for a water filling fault is sent to the fault module. During the drainage phase, the resonant frequency is subtracted from the previously acquired resonant frequency to obtain the drainage frequency change value. If the change value is less than a preset threshold, an alarm message for a drainage fault is sent to the fault module. During the water filling or drainage phase, if the interval between acquiring the resonant frequency is greater than a preset interval time threshold, an alarm message for a water filling or drainage fault is sent to the fault module. This system can monitor the water filling or drainage phases of the washing machine in real time and promptly notify the user to handle any water level faults.

[0033] 2. If the above water filling or drainage stages are normal, the water level corresponding to the resonant frequency is obtained according to the water level-frequency standard curve, and the water level change within the interval of the water filling or drainage stage is obtained, thereby obtaining the water level rise rate or water level fall rate per unit time; the corresponding remaining actual total washing time is calculated based on the different types of standard water filling time or standard drainage time provided by the washing machine, the current real-time water filling level or real-time drainage level, the target standard water filling level or target standard drainage level, the target standard total washing time, and the timing period, and is sent to the human-machine interface for display in real time; the remaining actual total washing time can be obtained in real time, avoiding the inaccurate display of the remaining actual total time in the prior art. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of the present invention. Detailed Implementation

[0035] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] like Figure 1As shown, an intelligent water level monitoring system for a washing machine includes: a human-machine interface, a data acquisition module, a washing control center, and an alarm module.

[0037] In this application, the human-computer interaction interface is used by the user to operate the settings of the washing machine, such as power on / off settings, washing function settings, etc.; the human-computer interaction interface is also used to display the remaining washing time, water level, etc. of the washing machine.

[0038] Specifically, the user sets the target standard water level and the target standard total washing time through the human-computer interaction interface; the human-computer interaction interface sends the acquired target standard water level and target standard total washing time to the washing control center;

[0039] In this application, the data acquisition module is used to collect water level data in the washing machine and send the acquired water level data to the washing control center;

[0040] Specifically, the data acquisition module includes an air chamber connected to the washing machine drum, an air hose, and a pressure sensor. The pressure sensor acquires air pressure values ​​through the air chamber and air hose connected to the inside of the washing machine drum. The pressure sensor incorporates a parallel resonant circuit, where the inductance is directly proportional to the air pressure value, according to the parallel resonant frequency formula. Obtain the resonant frequency and send it to the washing control center;

[0041] In this application, the washing control center is used to store and analyze the acquired target standard water level, target standard total washing time, and resonant frequency value.

[0042] Specifically, the washing control center is equipped with a data storage unit, a timing unit, and a data processing unit;

[0043] The data storage unit is used to store the acquired target standard water level, target standard total washing time, and resonant frequency value.

[0044] The timing unit is used to time the washing process of the washing machine;

[0045] The data processing unit is used to analyze and process the acquired data, as follows:

[0046] Step S1: The data processing unit extracts the target standard water level, the target standard total washing time, and the resonant frequency value from the data storage unit;

[0047] Step S2: The data processing unit acquires the resonant frequency in real time and subtracts the time points of continuous acquisition of the resonant frequency to obtain the interval time; a preset interval time threshold is set.

[0048] If the current stage is water injection, the data processing unit subtracts the previously acquired resonant frequency from the acquired resonant frequency each time to obtain the water injection frequency change value AZ; a preset threshold value AZs for the water injection frequency change value is set; when AZ is greater than AZs, the data processing unit sends an alarm message for water injection failure to the alarm module; when AZ is less than or equal to AZs, it is normal.

[0049] If the current stage is drainage, the data processing unit subtracts the previously acquired resonant frequency from the acquired resonant frequency each time to obtain the drainage frequency change value AP; the preset threshold for the drainage frequency change value is APs; when AP is less than APs, the data processing unit sends an alarm message for drainage failure to the alarm module; when AP is greater than or equal to APs, it is normal.

[0050] If the current stage is water injection or drainage, the data processing unit calculates the interval time for continuously acquiring the resonant frequency; if the calculated interval time is greater than the preset interval time threshold, the data processing unit sends an alarm message for water injection or drainage failure to the alarm module; if the calculated interval time is less than or equal to the preset interval time threshold, it is normal.

[0051] Step S3: If the interval between obtaining the resonant frequency during the water injection or drainage stage is normal, and the changes in the water injection frequency or drainage frequency are both normal, then:

[0052] If the current phase is water injection, the data processing unit obtains the water level corresponding to the resonant frequency based on the water level-frequency standard curve, thereby obtaining the change in water level during the interval of the water injection phase.

[0053] The data processing unit obtains the water level rise rate (VS) per unit time based on the water level change over the interval;

[0054] The data processing unit marks the standard water injection time for different types of water injection stages as Ti, the real-time water injection level as HZ, and the target standard water injection level as HS; the target standard total washing time is marked as TZ, and the time period from the start of the timing unit to the current time point is marked as T; where i represents the number of different types of water injection stages of the washing machine; i = 1, 2, ... i;

[0055] According to the calculation formula Obtain the remaining actual total washing time TS and send it to the human-computer interaction interface for display in real time;

[0056] If the current stage is drainage, the data processing unit obtains the water level corresponding to the resonant frequency based on the water level-frequency standard curve, thereby obtaining the change in water level during the drainage stage interval.

[0057] The data processing unit obtains the water level drop rate VX per unit time based on the water level change over the interval;

[0058] The data processing unit marks the standard water injection time for different types of drainage stages as Tj, marks the real-time drainage water level as HP, and sets the target standard drainage water level to 0; where j represents the number of different types of drainage stages of the washing machine; j = 1, 2, ... j;

[0059] According to the calculation formula Obtain the remaining actual total washing time TS and send it to the human-computer interaction interface for display in real time;

[0060] In this application, the alarm module is used to sound an alarm based on the acquired alarm information, prompting the user that the washing machine is malfunctioning in terms of water filling or drainage.

[0061] The above formulas are all numerical calculations after removing dimensions. The formulas are obtained by software simulation based on a large amount of data and are closest to the real situation. The preset parameters and preset thresholds in the formulas are set by those skilled in the art according to the actual situation or obtained by simulation based on a large amount of data.

[0062] The working principle of this invention is as follows: This invention displays the remaining washing time and water level of the washing machine through a human-machine interface, and allows the user to operate the washing machine settings through the human-machine interface. The acquired target standard water level and target standard total washing time are sent to the washing control center. The data acquisition module collects the real-time resonant frequency from the pressure sensor and sends it to the washing control center. The washing control center stores and analyzes the acquired target standard water level, target standard total washing time, and resonant frequency value. The washing control center is equipped with a storage unit, a timing unit, and a data processing unit. Specifically, the data processing unit subtracts the timing points of continuously acquired resonant frequencies to obtain the interval time, and a preset interval time threshold is set. During the water filling stage, the resonant frequency acquired each time is subtracted from the previously acquired resonant frequency to obtain the water filling frequency change value. If it is greater than the preset water filling frequency change value threshold, an alarm message for a water filling fault is sent to the fault module. During the drainage phase, the resonant frequency obtained each time is subtracted from the previously obtained resonant frequency to obtain the drainage frequency change value. If it is less than the preset drainage frequency change value threshold, an alarm message for drainage failure is sent to the fault module. During the water filling or drainage phase, if the interval time for obtaining the resonant frequency is greater than the preset interval time threshold, an alarm message for water filling or drainage failure is sent to the fault module. If the above water filling or drainage phases are normal, the water level corresponding to the resonant frequency is obtained according to the water level-frequency standard curve, and the water level change within the interval time of the water filling or drainage phase is obtained, thereby obtaining the water level rise rate or water level fall rate per unit time. Based on the different types of standard water filling time or standard drainage time provided by the washing machine, the current real-time water filling level or real-time drainage level, the target standard water filling level or target standard drainage level, the target standard washing time, and the timing period, the corresponding remaining actual total washing time is calculated and sent to the human-machine interface for display in real time.

[0063] The above embodiments are only used to illustrate the technical methods of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of the present invention without departing from the spirit and scope of the technical methods of the present invention.

Claims

1. An intelligent water level monitoring system for a washing machine, characterized in that, The washing machine comprises a man-machine interactive interface, a data acquisition module, a washing control center and an alarm module. The man-machine interactive interface is used for displaying the washing remaining time and water level of the washing machine, and is also used for user operation on the setting of the washing machine, sending the obtained target standard water level and target standard washing total time to the washing control center. The washing control center is used for storing and analyzing the obtained target standard water level, target standard washing total time and resonant frequency value; the washing control center comprises a data storage unit, a timing unit and a data processing unit; the data storage unit is used for storing the obtained target standard water level and target standard washing total time and resonant frequency value; the timing unit is used for timing the washing process of the washing machine. The data acquisition module is used for collecting real-time resonance frequency in the pressure sensor and sending to the washing control center; the data acquisition module is provided with an air chamber connected with the washing machine cylinder, an air hose and a pressure sensor; the pressure sensor obtains the air pressure value through the air chamber and the air hose connected with the inside of the washing machine cylinder; the parallel resonance circuit is arranged in the pressure sensor; the inductance in the parallel resonance circuit is in direct proportion to the air pressure value; the resonance frequency is obtained according to the parallel resonance frequency formula ​ The data processing unit processes the obtained data as follows: Step S1: extracting data from the data storage unit; Step S2: subtracting the timing time points of the continuously obtained resonant frequencies to obtain the interval time, and presetting the interval time threshold value; In the water injection stage, subtracting the resonant frequency obtained each time from the resonant frequency obtained last time to obtain the water injection frequency change value AZ; presetting the water injection frequency change value threshold value AZs; if AZ is greater than AZs, sending the water injection fault alarm information to the fault module; In the water draining stage, subtracting the resonant frequency obtained each time from the resonant frequency obtained last time to obtain the water draining frequency change value AP; presetting the water draining frequency change value threshold value APs; If AP is less than APs, sending the water draining fault alarm information to the fault module; In the water injection or water draining stage, if the interval time of the obtained resonant frequencies is greater than the preset interval time threshold value, sending the water injection or water draining fault alarm information to the fault module; Step S3: if the water injection or water draining stage in step S2 is normal, obtaining the water level corresponding to the resonant frequency according to the water level-frequency standard curve, obtaining the water level change amount in the interval time of the water injection or water draining stage, and thus obtaining the water level rising rate or water level falling rate per unit time; According to the different types of standard water injection time or standard water draining time of the washing machine device, the current real-time water injection water level or real-time water draining water level, the water injection target standard water level or water draining target standard water level, the target standard washing total time and the timing time period, the corresponding remaining actual washing total time is calculated and sent to the man-machine interactive interface for display in real time; The alarm module is used for buzzer alarm of the obtained alarm information. If the current is the water injection stage, the data processing unit obtains the water level rising rate VS per unit time; The data processing unit marks the standard water injection time of different types of water injection stages as Ti, marks the real-time water injection water level as HZ, marks the water injection target standard water level as HS, marks the target standard washing total time as TZ, and marks the time period from the start of the timing unit to the current time point as T; Wherein i represents the number of different types of water injection stages of the washing machine; If the current is the water draining stage, the data processing unit obtains the water level falling rate VX per unit time; ​ According to the calculation formula TS = TZ - T + Ti - , the remaining actual total washing time TS is obtained and sent to the man-machine interaction interface in real time for display. ​ The data processing unit marks the standard water injection time of different types of drainage stages as Tj, marks the real-time drainage water level as HP, and marks the target standard water level of drainage as 0; marks the target standard washing total time as TZ, and marks the time period from the start of the timing unit to the current time point as T; Wherein j represents the number of different types of drainage stages of the washing machine; According to the calculation formula TS = TZ - T + Tj - , the remaining actual total washing time TS is obtained and sent to the man-machine interaction interface in real time for display.

2. A smart water level monitoring system for a washing machine as claimed in claim 1, wherein, The user operates the settings of the washing machine, including switch settings and washing functions.

3. A smart water level monitoring system for a washing machine as claimed in claim 1, wherein, In the water injection stage, the data processing unit obtains a water injection frequency change value AZ; if AZ is less than or equal to AZs, no fault information is sent to the alarm module; In the drainage stage, the data processing unit obtains a drainage frequency change value AP; if AP is greater than or equal to APs, no fault information is sent to the alarm module; In the water injection or drainage stage, if the calculated interval time is less than or equal to the preset interval time threshold, no fault information is sent to the alarm module.

Images