Clothing weight detection system and method

Abstract

The invention discloses a clothing weight detection system and method. The clothing weight detection system comprises a control unit and a capacitive sensing unit, the capacitance sensing unit comprises a capacitor and a capacitance detection circuit; the first pole plate of the capacitor is a fixed plate which is fixedly arranged on an airing rod of the clothes airing machine; the capacitor second polar plate is a floating plate and is arranged on the clothes hanging side of the airing rod of the clothes airing machine, and when the corresponding position of the airing rod is deformed, the floating plate can be driven to move relative to the fixed plate; the control unit is connected with the capacitor through the capacitance detection circuit and used for detecting the capacitance value of the capacitor so as to determine the weight of clothes on the airing rod based on the capacitance value. The weight of clothes on the airing rod of the clothes airing machine can be accurately detected, and the clothes airing machine has the advantages of being simple in structure and low in cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of airing control, in particular to a clothes weight detection system and method. BACKGROUND

[0002] With the rapid development of smart home, the clothes drying machine gradually becomes a common household appliance in family life because of its functions of automatic lifting, drying, sterilization, etc. In the use process of the clothes drying machine, the detection of the clothes weight on the drying rod is crucial, on the one hand, it can prevent the clothes drying machine from being damaged or accidents from occurring due to the overloading of clothes, and on the other hand, it can adjust the operating parameters of the drying, air-drying, etc. according to the clothes weight, so as to realize energy saving and efficient operation.

[0003] At present, the clothes drying machine drying rod weighing detection mainly adopts the following methods: the first method is to install a pressure sensor at the connecting part of the drying rod and the lifting assembly, and to realize weighing by detecting the pressure generated by the clothes weight on the pressure sensor. However, this method has the problem of complex structure, needs special design of the connecting structure of the clothes drying machine, has great installation difficulty, and the pressure sensor is easily affected by external vibration and temperature change, so the detection precision is low; the second method is to use a tension sensor to detect the tension of the drying rod when it is hung to calculate the clothes weight, this method also has the problems of high cost and easy interference, and the installation of the tension sensor will affect the overall appearance of the clothes drying machine; the third method is to use a strain gauge sensor, the strain gauge is pasted on the surface of the drying rod, the strain of the drying rod caused by the clothes weight changes the resistance of the strain gauge to realize weighing, but the pasting process of the strain gauge sensor is high in requirement, is easy to fall off after long-term use, has poor stability, and is greatly affected by the environment humidity and temperature, so the detection error is large. SUMMARY

[0004] The first object of the present application is to overcome the shortcomings and deficiencies of the prior art, and to provide a clothes weight detection system, through which the clothes weight on the drying rod of the clothes drying machine can be accurately detected, and which has the advantages of simple structure and low cost.

[0005] The second object of the present application is to provide a clothes weight detection method.

[0006] The third object of the present application is to provide a computer program product.

[0007] The first object of the present application is achieved by the following technical scheme: a clothes weight detection system applied to a clothes drying machine, comprising a control unit and a capacitive sensing unit; The capacitive sensing unit comprises a capacitor and a capacitive detection circuit; The first plate of the capacitor is a fixed plate fixedly installed on the drying rod of the clothes drying machine; The second plate of the capacitor is a floating plate, which is set on the clothes hanging side of the clothes drying rack. When the corresponding position of the drying rack deforms, the floating plate can be driven to move relative to the fixed plate. The control unit is connected to a capacitor via a capacitance detection circuit to detect the capacitance value and determine the weight of the clothes on the drying rack based on the capacitance value.

[0008] Preferably, the first and second plates of the capacitor are disposed on the inner wall of the drying rod, and are arranged along the axial direction of the drying rod in the length direction; Alternatively, the first and second plates of the capacitor are disposed on the inner wall of the drying rod, and are arranged radially along the length of the drying rod.

[0009] Preferably, an elastic connector is provided between the first plate and the second plate of the capacitor.

[0010] Preferably, the capacitive sensing unit includes one or more capacitors; When there are multiple capacitors, each capacitor is connected to the control unit through a capacitance detection circuit and is installed on the drying rod along the length of the drying rod.

[0011] Furthermore, when there are multiple capacitors, each capacitor is respectively installed at each clothing hanging position on the drying rod, or the distance between two adjacent capacitors is preset.

[0012] Preferably, the capacitance detection circuit includes a resistor connected in series with the capacitor; The two ends of the capacitor and resistor connected in series are respectively connected to the positive and negative terminals of the power supply, or the two ends of the capacitor and resistor connected in series are respectively connected to the control unit IO port and the positive terminal of the power supply, or the two ends of the capacitor and resistor connected in series are respectively connected to the control unit IO port and the negative terminal of the power supply. One end of the capacitor and resistor is connected to the ADC acquisition port of the control unit, and the capacitance value of the capacitor is determined by the voltage information acquired by the ADC acquisition port.

[0013] The second objective of this invention is achieved through the following technical solution: a method for detecting the weight of clothing based on the clothing weight detection system described in the first objective of this invention, comprising: Collect the information sensed by the capacitive sensing unit; The capacitance value of the capacitor in the capacitor sensing unit is determined based on the information sensed by the capacitor sensing unit. The weight of the clothes on the drying rack is determined based on the relationship between the capacitor capacitance value and the weight of the clothes on the drying rack.

[0014] Preferably, when the capacitance sensing unit includes multiple capacitors, the capacitance value of each capacitor is obtained separately, and then a weighted average is performed to obtain the final capacitance value. Based on the relationship between the capacitor capacitance value and the weight of the clothes on the drying rack, the current weight of the clothes on the drying rack is determined according to the final capacitance value.

[0015] Preferred options also include: Obtain current ambient temperature and / or humidity information; The detected capacitor capacitance value is corrected based on the current ambient temperature and / or humidity information; finally, the weight of the clothes on the drying rack is determined based on the relationship between the capacitor capacitance value and the weight of the clothes on the drying rack, according to the corrected capacitance value.

[0016] The second objective of this invention is achieved through the following technical solution: a computer program product, comprising a computer program, which, when executed by a processor, implements the clothing weight detection method described in the first objective of this invention.

[0017] The present invention has the following advantages and effects compared with the prior art: (1) The clothing weight detection system of the present invention includes a control unit and a capacitance sensing unit; the capacitance sensing unit includes a capacitor and a capacitance detection circuit; the first plate of the capacitor is a fixed plate fixedly installed on the drying rod; the second plate of the capacitor is a floating plate, which is set on the clothing hanging side of the drying rod of the clothes dryer; the control unit is connected to the capacitor through the capacitance detection circuit and determines the weight of the clothing on the drying rod based on the capacitance value of the capacitor. In this invention, a capacitor is installed on the clothes drying rod, with a floating plate positioned on the clothes-hanging side. When clothes are hung on the rod, causing deformation, the floating plate is displaced relative to the fixed plate, which in turn causes the second plate to displace relative to the first plate, thus changing the capacitance value of the capacitor. Since the weight of the clothes on the rod varies, the degree of deformation also varies, further affecting the capacitance value. Therefore, this system can determine the weight of the clothes on the rod based on the capacitor's capacitance value. In terms of implementation, this invention only requires installing the capacitor on the drying rod, without significant modifications to the external structure of the clothes dryer, offering advantages of simple structure and low cost. Furthermore, compared to various sensors used in existing technologies, this invention senses weight information through capacitor capacitance, is less affected by environmental factors, and achieves more accurate weight detection.

[0018] (2) In the clothing weight detection system of the present invention, the two plates of the capacitor are set on the inner wall of the drying rod. The length direction of the plates can be set along the axial direction of the drying rod, that is, parallel to the length of the drying rod. In this case, the deformation of the drying rod due to hanging clothes will cause the distance between the two plates of the capacitor to change, thereby causing a change in the capacitance value of the capacitor. Alternatively, the length direction of the plates can also be set along the radial direction of the drying rod, that is, perpendicular to the length of the drying rod. In this case, the deformation of the drying rod due to hanging clothes will cause the area between the two plates of the capacitor to change, thereby causing a change in the capacitance value of the capacitor. It can be seen that the position setting of the capacitor in the system of the present invention is very flexible. The setting position and direction of the capacitor plates can be selected according to the actual shape and structure of the drying rod, which greatly facilitates the installation of the capacitor.

[0019] (3) In the clothing weight detection system of the present invention, an elastic connector is provided between the first and second plates of the capacitor, that is, between the floating plate and the fixed plate. This connector can act as a mechanical low-pass filter, effectively buffering high-frequency impacts and severe vibrations, preventing these interferences from being directly transmitted to the floating plate, and effectively protecting the stability of the output signal of the capacitor detection circuit. In addition, when the drying rod is deformed by force, the floating plate can be displaced / moved. When the weight of the clothing is removed and the drying rod returns to its original shape, the restoring force of the elastic connector can accurately reset the floating plate to its initial position, ensuring the repeatability of the measurement and the stability of the zero point.

[0020] (4) In the clothing weight detection system of the present invention, the capacitive sensing unit may include multiple capacitors, and each capacitor may be arranged along the length of the drying rod. Based on this, the present invention can determine the weight of the clothing on the drying rod by combining the capacitance values ​​of multiple capacitors. This overcomes the defect that the capacitance value changes detected by a single capacitive sensing module cannot accurately reflect the overall weight due to the uneven placement of clothing on the drying rod, and further improves the accuracy of clothing weight detection in the present invention system. In addition, in the present invention, each capacitor may be set at each clothing hanging position on the drying rod so as to more obviously sense the deformation of the drying rod, further improving the accuracy of clothing weight detection on the drying rod.

[0021] (5) In the clothing weight detection system of the present invention, the capacitance detection circuit includes a resistor. The control unit collects the voltage information of the plates connected to the capacitor and the resistor through the ADC acquisition port, and determines the capacitance value of the capacitor based on the voltage information. It has the advantages of simple structure and low cost. In addition, the two ends of the capacitor and the resistor can be connected to the control unit IO port and the positive or negative power supply terminal. The charging and discharging control of the capacitor can be automatically realized by controlling the level signal of the control unit IO port, so that the capacitor works more stably.

[0022] (6) In the clothing weight detection method of the present invention, after determining the capacitance value of the capacitor, the weight of the clothing on the drying rod can be directly determined based on the relationship between the capacitance value of the capacitor and the weight of the clothing on the drying rod. It has the advantages of high accuracy in clothing weight detection and simple and easy implementation.

[0023] (7) In the clothing weight detection method of the present invention, when multiple capacitors are arranged along the length of the drying rod, the capacitance value of each capacitor can be obtained separately, and then the final capacitance value is obtained after weighted averaging. Finally, the weight of the clothing on the drying rod is determined based on this capacitance value. Since multiple capacitance sensing modules can detect the capacitance change caused by the weight in different areas, the arrangement of multiple capacitors in the present invention can effectively eliminate the detection error caused by uneven placement of clothing.

[0024] (8) The clothing weight detection method of the present invention also includes real-time acquisition of the current ambient temperature and / or humidity information, correction of the detected capacitor capacitance value based on the acquired current ambient temperature and / or humidity information, and finally determination of the weight of clothing on the drying rack based on the corrected capacitance value. Based on this, the detection method of the present invention can eliminate the interference of external interference such as ambient temperature and humidity on the capacitance value, accurately capture the small capacitance changes caused by the weight of clothing, and further ensure the accuracy of clothing weight detection. Attached Figure Description

[0025] Figure 1 This is a structural block diagram of the clothing weight detection system of the present invention.

[0026] Figure 2a and 2b This is a schematic diagram of the installation of the capacitive sensing unit in the agenda weight detection system of the present invention.

[0027] Figure 3 This is a circuit diagram of the clothing weight detection system of the present invention.

[0028] Figure 4 This is a schematic diagram of the capacitance detection circuit in the clothing weight detection system of the present invention.

[0029] Figure 5 This is a flowchart of the invention of a method for detecting the weight of clothing. Detailed Implementation

[0030] The embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the embodiments described below with reference to the accompanying drawings are exemplary descriptions for explaining the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions of the embodiments of this application.

[0031] Example 1 With the increasing intelligence of clothes drying racks, the function of detecting the weight of clothes on the drying rods has become increasingly important. For example, based on the weight information of the clothes on the rods, it is possible to determine whether the clothes drying rack is overloaded, enabling timely overload protection to avoid safety issues. Furthermore, the weight information can determine the quantity of clothes being dried, allowing for adjustments to the drying and disinfection functions based on the quantity, thus improving the overall intelligence of the clothes drying rack. However, currently, the weight detection of clothes on clothes drying racks primarily relies on weighing sensors, such as pressure sensors, tension sensors, and strain gauge sensors. These methods suffer from problems such as complex installation structures, high costs, and low accuracy in weight detection.

[0032] Based on the problems existing in the prior art, this embodiment provides a clothing weight detection system. This detection system is applied to a clothes drying rack and can accurately detect the weight of clothing on the drying rack rod. It also has the advantages of simple structure and low cost.

[0033] The clothes drying rack referred to in this embodiment generally includes a main unit and drying rods. The main unit is generally installed on the ceiling. The aforementioned drying rods generally refer to drying rod assemblies. The drying rods are set below the main unit by steel wire ropes or other lifting devices. The drying rod assembly generally includes one or more clothes drying rods for drying clothes, one or more quilt drying rods for drying bedding, and one or more horizontal rods for drying small items (underwear, socks, towels, etc.). Clothes of general size are usually hung on the drying rods, quilt drying rods, or small drying rods using clothing hangers (such as clothes hangers). The aforementioned drying rod assembly is usually made of aluminum alloy or plastic. The main unit contains a main controller, a power system, and other components. The power system of the clothes drying rack can include a motor, a reel, a pulley assembly, and a steel wire rope. The main controller is connected to the motor via a motor driver to control the motor's rotation. The reel is driven by the motor's output shaft. One end of the steel wire rope is mounted on the reel, and the other end passes through a pulley in the pulley assembly to change direction (from horizontal to vertical) and is fixedly connected to the drying rod assembly below the main unit. The reel rotates under the motor's drive, which winds up and unwinds the steel wire rope, thereby causing the drying rod assembly on the steel wire rope to move upwards or downwards. The clothes drying rack is equipped with a drying module and / or an air-drying module for drying clothes, generally located on the main unit and / or the drying rod. Additionally, lighting, disinfection, and other functional modules can be added to the clothes drying rack. These functional modules can be controlled by commands issued by the main controller on the clothes drying rack's main unit.

[0034] like Figure 1 As shown, the clothing weight detection system of this embodiment includes a control unit and a capacitive sensing unit. Wherein: The capacitance sensing unit includes a capacitor and a capacitance detection circuit; the capacitor includes a first plate and a second plate arranged in parallel.

[0035] In this embodiment, the first plate of the capacitor is a fixed plate that is fixedly installed on the clothes drying rack. The position of the fixed plate on the drying rack satisfies the following condition: when the drying rack deforms due to the weight of the clothes, the position of the fixed plate does not change, that is, it does not displace.

[0036] In this embodiment, the second plate of the capacitor is a floating plate, which is disposed on the clothes hanging side of the clothes drying rack. When the corresponding position of the drying rack deforms, the floating plate can be driven to move relative to the fixed plate. Specifically, the distance d between the floating plate and the fixed plate may change, or the area S between the floating plate and the fixed plate may change, which includes changes in the horizontal or vertical position between the two.

[0037] In this embodiment, the first electrode 1 and the second electrode 2 of the capacitor are disposed on the inner wall of the drying rod 4, and are arranged along the axial direction of the drying rod, that is, the two electrodes of the capacitor are parallel to the drying rod in the length direction. Figure 2a As shown in the diagram; specifically, the second plate 2 of the capacitor can be attached to the second inner wall 42 of the drying rod 4 or installed on the second inner wall 42 of the drying rod 4 through other mounting parts. The second inner wall 42 is located on the clothes hanging side of the drying rod, and will deform to a certain extent when clothes are hung on the drying rod 4; the first plate 1 of the capacitor is fixedly installed on the first inner wall 41 of the drying rod. The first inner wall 41 is the inner wall of the drying rod away from the clothes hanging side of the drying rod. When the drying rod deforms, the position of the first plate as a fixing plate will not change. Generally speaking, the second inner wall 42 of the drying rod is the upper inner wall of the drying rod. Clothes are generally hung on the upper outer surface of the drying rod, and the first inner wall of the drying rod is the lower inner wall of the drying rod. When clothes are hung on the upper outer surface of the drying rod, the upper side of the drying rod will deform. This deformation causes the second plate on the second inner wall 42 of the drying rod to sink, and the distance relative to the first plate 1 changes, that is, the distance d between the two plates changes. Compared with the state where no clothes are hung, the distance d between the two plates is smaller.

[0038] like Figure 2b As shown in the figure, in this embodiment, the length direction of the first and second plates of the capacitor can also be arranged radially along the drying rod, that is, the first and second plates are perpendicular to the drying rod in the length direction; specifically, the first end of the second plate of the capacitor (corresponding to Figure 2b The middle (upper end) is attached to the second inner wall 42 of the drying rod or installed on the second inner wall 42 of the drying rod through other mounting parts. The second end of the first plate 1 of the capacitor (corresponding to) Figure 2bThe capacitor (with the lower end in the middle) is attached to the first inner wall 41 of the drying rod 4 or fixedly installed on the first inner wall 41 of the drying rod 4 by other mounting parts. The second inner wall 42 of the drying rod 4 is located on the clothes hanging side of the drying rod, and the first inner wall 41 is the inner wall of the drying rod away from the clothes hanging side. The second end of the first electrode of the capacitor is diagonally opposite to the first end of the second electrode. When clothes are hung on the clothes hanging side of the drying rod, the second inner wall of the drying rod deforms, causing the second electrode to sink, and the area facing the first electrode changes. Compared with the state without clothes, the two electrodes of the capacitor are misaligned, and the area facing each other S decreases.

[0039] Based on the formula for calculating the capacitance value of a capacitor It can be seen that the capacitance of a capacitor is affected by the dielectric constant. The distance d between the two plates and the area S of the two plates facing each other are both factors that affect the capacitance value of the capacitor. Therefore, the two methods of the two plates of the capacitor in this embodiment change the distance d between the plates and the area S of the two plates facing each other, respectively. Since the capacitor is installed inside the drying rod, which is generally in a closed state, its dielectric constant is less affected by environmental factors such as temperature, humidity, and dust.

[0040] In this embodiment, the control unit is connected to a capacitor through a capacitance detection circuit to detect the capacitance value of the capacitor in order to determine the weight of the clothes on the drying rack based on the capacitance value.

[0041] In this embodiment, the capacitance detection circuit includes a resistor connected in series with the capacitor; such as Figure 3 As shown, the two ends of the capacitor and resistor connected in series are respectively connected to the positive and negative terminals of the power supply, or, as... Figure 4 As shown, the two ends of the capacitor and resistor connected in series are respectively connected to the control unit's I / O port and the positive terminal of the power supply, or the two ends of the capacitor and resistor connected in series are respectively connected to the control unit's I / O port and the negative terminal of the power supply; in addition, one end of the capacitor and resistor is connected to the control unit's ADC acquisition port, and the capacitance value of the capacitor is determined by the voltage information acquired by the ADC acquisition port. The control unit calculates the capacitance value of the capacitor based on the acquired voltage information: ; Where t is the time elapsed from when the capacitor is energized to the current moment. This represents the voltage value currently collected on one plate of the capacitor; This refers to the charging voltage of the capacitor; when the capacitance detection circuit is as follows... Figure 3 As shown, The output voltage of the DC power supply is given by the following connection relationship of the capacitor detection circuit: Figure 4 As shown, This is the high-level voltage output from the control unit's I / O port.

[0042] In this embodiment, after detecting the capacitor capacitance value, the control unit can determine the real-time weight of the clothes on the drying rack based on the relationship between the capacitor capacitance value and the weight of the clothes on the rack. Specifically, the main control unit pre-stores a model of the correspondence between capacitance value and clothing weight. Based on the determined capacitor capacitance value, it calls the model to calculate the weight of the clothes on the drying rack.

[0043] In this embodiment, to ensure the accuracy of weight calculation, the correspondence model between capacitance value and clothing weight can be determined as follows: The ambient temperature and humidity are kept stable. Standard weights of different known weights are applied to the drying rod (e.g., from 1 kg to the rated load of the clothes dryer, increasing by 1 kg each time). After each weight is applied, the capacitance value of the capacitor after the capacitance sensing module stabilizes is recorded, resulting in multiple sets of weight-capacitance data. Finally, the least squares method is used to fit these data to obtain a linear regression equation between capacitance value and weight: W = aC + b, where W is the weight, C is the capacitance value, and a and b are fitting coefficients. This equation is the correspondence model between capacitance value and weight. In actual use, the main control unit substitutes the determined capacitor capacitance value into this equation to quickly calculate the weight of the clothing.

[0044] In this embodiment, the capacitance sensing unit may include one or more capacitors. When there are multiple capacitors, each capacitor is connected to the control unit through a capacitance detection circuit and can be arranged along the length of the drying rod. Specifically, each capacitor is arranged at each clothing hanging position on the drying rod, or they can be spaced at preset intervals, such as 50cm. Based on this, the system in this embodiment can detect the capacitance changes caused by the weight of different areas of the drying rod through multiple capacitors. Specifically, for the capacitance values ​​of each capacitor, a weighted average processing method is used to calculate the final capacitance value. The weight of each capacitor's capacitance value can be set based on the probability of clothing distribution at the capacitor's location. Based on this, detection errors caused by uneven clothing distribution can be effectively eliminated.

[0045] In this embodiment, an elastic connector, such as a spring, elastic silicone pillar, or flexible film, can be provided between the first and second plates of the capacitor. This elastic connector acts as a mechanical low-pass filter, effectively buffering high-frequency impacts and severe vibrations, preventing these interferences from being directly transmitted to the floating plate, and effectively protecting the stability of the output signal of the capacitor detection circuit. Furthermore, when the clothesline deforms under stress, the floating plate can be displaced / moved. When the weight of the clothes is removed and the clothesline returns to its original shape, the restoring force of the elastic component can precisely reset the floating plate to its initial position, ensuring the repeatability of the measurement and zero-point stability.

[0046] The control system of this embodiment may further include a temperature sensor and / or a humidity sensor, wherein the temperature sensor and the humidity sensor are respectively connected to the control unit for detecting the ambient temperature and humidity, so that the control unit can correct the capacitance value of the capacitor based on the ambient temperature and / or humidity information, so as to obtain more accurate clothing weight information.

[0047] In this embodiment, the control unit can be the main controller on the clothes drying rack host, or it can be a separately configured controller, such as a microcontroller. If it is the latter, the controller needs to communicate with the main controller on the host. Specifically, the control unit can be a controller installed on the host or a controller installed on the drying rod. When the control unit is installed on the drying rod, it can communicate with the main controller on the host via a wireless communication module. Specifically, the control unit is connected to a first wireless communication module, and the main controller on the host is connected to a second communication module. The control unit and the main controller communicate through the first and second wireless communication modules, which can be Bluetooth, Wi-Fi, Zigbee, etc. The control unit connects to the main controller on the clothes drying rack host. After determining the weight of the clothes on the drying rod based on the capacitor capacitance value, the control unit sends this weight information to the main controller on the clothes drying rack host, enabling the main controller to execute corresponding control functions based on the weight information. Alternatively, the control unit can also directly send the capacitance value information to the main controller on the clothes drying rack host after determining the capacitor capacitance value, allowing the main controller to determine the weight of the clothes on the drying rod and then execute corresponding control functions.

[0048] In this embodiment, after determining the weight of the clothes on the drying rack based on the capacitor capacitance value, the main control unit can perform the following control: compare the weight of the clothes on the drying rack with the rated load capacity of the clothes drying machine. If the weight exceeds the rated load capacity, control the motor in the clothes drying machine's power system to stop working to prevent motor overload damage or wire rope breakage. Simultaneously, issue an overload alarm through the user interaction module (e.g., user terminal, speaker, etc.) to remind the user to reduce the weight of clothes being dried. Additionally, the main control unit can also determine the amount of clothes to be dried on the drying rack based on the weight information. When the weight of the clothes is less than a set weight threshold, the control unit can control the drying device of the clothes drying machine to reduce power or stop working to avoid energy waste.

[0049] In summary, the clothing weight detection system of this embodiment integrates a capacitor on the drying rod, for example, inside the drying rod. The second plate (floating plate) of the capacitor is located on the side of the drying rod where the clothes are hung. When the clothes are hung on the drying rod and undergo a slight downward bending deformation, this deformation directly pushes the floating plate to displace relative to the first plate (fixed plate), thereby changing the distance between the two plates or the area of ​​their opposing surfaces, and further causing a change in the capacitance value of the capacitor. In this embodiment, since the degree of deformation of the drying rod is definitely related to the weight of the clothes, and the capacitance value is highly sensitive to the distance between the plates or the area of ​​their opposing surfaces, the control unit only needs to collect the change in the capacitance value of the capacitor in real time to accurately determine the weight of the current clothes, achieving an invisible sensing of "weighing as soon as clothes are hung". Therefore, this embodiment only needs to embed the capacitor inside the drying rod to be integrated into existing clothes dryers, which has the advantages of simple structure and low cost. Compared with the traditional sensors commonly used in the market, capacitive sensing uses an electric field instead of mechanical-magnetic-electric conversion, is less affected by environmental factors such as temperature, humidity, dust, and aging, has a signal-to-noise ratio that is an order of magnitude higher, and both weight resolution and repeatability accuracy are significantly improved.

[0050] Example 2 This embodiment discloses a method for detecting clothing weight based on the clothing weight detection system described in Embodiment 1, applied to a clothes drying rack, such as... Figure 5 As shown, it includes: Step S1: Collect the information sensed by the capacitive sensing unit.

[0051] In this embodiment, the information sensed by the capacitance sensing unit is voltage information; the control unit acquires the voltage signal fed back by the capacitance detection circuit through its ADC acquisition terminal, which corresponds to the voltage value on one plate of the capacitor. This signal is an analog signal, which is converted into a digital signal by the analog-to-digital converter module inside the control unit, improving the signal's anti-interference capability and ensuring that the data is not easily distorted during transmission, thus providing an accurate data basis for subsequent weight calculation.

[0052] In this embodiment, the control unit can acquire the voltage signal on the capacitor plates at a set sampling frequency of not less than 100 Hz. Based on this, it can capture changes in capacitance in real time and avoid delays in weight detection caused by excessively long sampling intervals. Additionally, the control unit can also acquire the voltage signal on the capacitor plates upon receiving a corresponding trigger signal, such as a button signal or a signal sent from another terminal.

[0053] Step S2: Determine the capacitance value of the capacitor in the capacitor sensing unit based on the information sensed by the capacitor sensing unit.

[0054] In this embodiment, the control unit can calculate the capacitance value of the capacitor based on the voltage value detected on the capacitor plates, as follows: ; Where t is the time elapsed from when the capacitor is energized to the current moment. This represents the voltage value currently collected on one plate of the capacitor; This refers to the charging voltage of the capacitor; when the capacitance detection circuit is as follows... Figure 3 As shown, The output voltage of the DC power supply is given by the following connection relationship of the capacitor detection circuit: Figure 4 As shown, This is the high-level voltage output from the control unit's I / O port.

[0055] In this embodiment, when the capacitive sensing unit includes multiple capacitors, the control unit can acquire the capacitance value of each capacitor separately, and then perform a weighted average to obtain the final capacitance value. The weight of each capacitor's capacitance value can be set based on the probability of clothing distribution at the capacitor's location. For example, if three capacitors are set along the length of the drying rod, and the weights of each capacitor are a1, a2, and a3 respectively, then the final capacitance value determined in this step is: C = a1*C1 + a2*C2 + a3*C3; Where C1, C2, and C3 are the capacitance values ​​of the three capacitors, and a1, a2, and a3 are the weights of the three capacitors. When the two capacitors with capacitance values ​​of C1 and C2 are placed at both ends of the drying rack, and the capacitor with capacitance value of C3 is placed in the middle of the drying rack, considering that the middle area of ​​the drying rack has a higher probability of drying clothes, the weight of the capacitor with capacitance value of C3, a3, can be set higher than that of a1 and a2. For example, a3 can be set to 0.5, and a1 and a2 can be set to 0.25.

[0056] In this embodiment, while calculating the capacitance value of the capacitor based on the voltage value detected on the capacitor plates, ambient temperature information can be obtained through a temperature sensor, and ambient humidity information can be obtained through a humidity sensor. Then, the capacitance value C of the capacitor is corrected based on the ambient temperature information and / or humidity information. The object of correction can be the capacitance value of a single capacitor, or the capacitance value obtained based on a weighted average. In this embodiment, the specific correction method can be as follows: ; Where C is the capacitance value before correction. The value is the corrected capacitance; k is the correction factor. In this embodiment, a correction factor table for the capacitor under different temperatures and / or humidity is established. For example, when the temperature is 25°C and the humidity is 50%, the correction factor is 1. The correction factor increases by 0.001 for every 1°C increase in temperature and by 0.002 for every 10% increase in humidity. Through the above correction, the interference of ambient temperature and humidity on the capacitor capacitance value can be effectively eliminated.

[0057] Step S3: Determine the weight of the clothes on the drying rack based on the relationship between the capacitor capacitance value and the weight of the clothes on the drying rack. In this embodiment, after detecting the capacitor capacitance value, the control unit can determine the real-time weight of the clothes on the drying rack based on the relationship between the capacitor capacitance value and the weight of the clothes on the drying rack. Specifically, a pre-stored model of the correspondence between capacitance value and clothing weight is used. Based on the determined capacitor capacitance value, the model is called to calculate the weight of the clothes on the drying rack.

[0058] In this embodiment, to ensure the accuracy of weight calculation, the correspondence model between capacitance value and clothing weight can be determined as follows: The ambient temperature and humidity are kept stable. Standard weights of different known weights are applied to the drying rod, such as from 1 kg to the rated load of the clothes drying machine, increasing by 1 kg each time. That is, after each weight is applied, the capacitance value of the capacitor after the capacitance sensing module stabilizes is recorded, resulting in multiple sets of weight-capacitance data. Finally, the least squares method is used to fit these data to obtain a linear regression equation between capacitance value and weight. W = aC + b; Where W represents weight, C represents capacitance, and a and b are fitting coefficients, this equation represents the relationship between capacitance and weight. In practical use, the capacitance value determined in step S3 is substituted into this equation to quickly calculate the weight of the clothing.

[0059] After determining the weight of the clothes on the drying rod in step S3, this embodiment can perform the following control on the clothes drying machine: Compare the weight of the clothes on the drying rack with the rated load capacity of the clothes drying machine; If the weight of the clothes on the drying rack exceeds the rated load, the motor in the clothes drying machine's power system will stop working to prevent overload damage to the motor or breakage of the drying rack. At the same time, an overload alarm will be issued through the user interaction module (such as user terminal, speaker, etc.) to remind the user to reduce the weight of clothes to be dried.

[0060] The amount of clothes to be dried on the drying rack is determined based on the weight information of the clothes on the drying rack. Specifically, the weight of the clothes can be compared with a set weight threshold. When the weight of the clothes is less than the set weight threshold, it is determined that there are few clothes drying on the drying rack or that the moisture content is low. At this time, the drying device of the clothes drying rack can be controlled to reduce the power or stop working to avoid unnecessary energy waste.

[0061] The steps described above in this embodiment are merely one implementation process. Those skilled in the art will understand that all or part of the steps in this embodiment can be implemented by a program instructing related hardware, and the corresponding program can be stored in a computer-readable storage medium. It should be noted that although the method operations of this embodiment are described in a specific order in the accompanying drawings, this does not require or imply that these operations must be performed in that specific order, or that all the shown operations must be performed to achieve the desired result. On the contrary, the described steps may be executed in a different order, some steps may be executed simultaneously, additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step, and / or one step may be broken down into multiple steps.

[0062] Example 3 This embodiment discloses a computer program product, including a computer program that, when executed by a processor, implements the clothing weight detection method described in Embodiment 2, including: Collect the information sensed by the capacitive sensing unit; The capacitance value of the capacitor in the capacitor sensing unit is determined based on the information sensed by the capacitor sensing unit. The weight of the clothes on the drying rack is determined based on the relationship between the capacitor capacitance value and the weight of the clothes on the drying rack.

[0063] The specific implementation process of each of the above steps can be as described in Example 2, and will not be repeated here.

[0064] The computer program product includes one or more computer instructions that, when loaded and executed on a computer, generate, in whole or in part, the processes or functions described in the embodiments of this application. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in or transmitted through a computer-readable storage medium. The computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium accessible to a computer or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., digital versatile disc (DVD)), or a semiconductor medium (e.g., solid-state disk (SSD)).

[0065] Example 4 This embodiment discloses an electronic device, including a memory, a processor, and a computer program stored in the memory. The processor executes the computer program to implement the clothing weight detection method described in Embodiment 2, including: Collect the information sensed by the capacitive sensing unit; The capacitance value of the capacitor in the capacitor sensing unit is determined based on the information sensed by the capacitor sensing unit. The weight of the clothes on the drying rack is determined based on the relationship between the capacitor capacitance value and the weight of the clothes on the drying rack.

[0066] The specific implementation process of each of the above steps can be as described in Example 2, and will not be repeated here.

[0067] In this embodiment, the electronic device can be a mobile phone, computer, tablet computer, or other terminal device.

[0068] In this embodiment, the electronic device includes a processor, a memory, a bus, and a communication interface, wherein the processor, the communication interface, and the memory are connected via the bus; the processor is configured to execute executable modules, such as computer programs, stored in the memory.

[0069] Example 5 This embodiment discloses a storage medium storing a program. When the program is executed by a processor, it implements the clothing weight detection method described in Embodiment 2, including: Collect the information sensed by the capacitive sensing unit; The capacitance value of the capacitor in the capacitor sensing unit is determined based on the information sensed by the capacitor sensing unit. The weight of the clothes on the drying rack is determined based on the relationship between the capacitor capacitance value and the weight of the clothes on the drying rack.

[0070] The specific implementation process of each of the above steps can be as described in Example 2, and will not be repeated here.

[0071] In this embodiment, the storage medium can be a disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), USB flash drive, portable hard drive, etc.

[0072] The above description is only an optional implementation method for some implementation scenarios of this application. It should be noted that for those skilled in the art, other similar implementation methods based on the technical concept of this application without departing from the technical concept of this application also fall within the protection scope of the embodiments of this application.

Claims

1. A laundry weight detection system, characterized by, The application is applied to a clothes airing machine, comprising a control unit and a capacitive sensing unit. The capacitive sensing unit comprises a capacitor and a capacitor detection circuit. The first plate of the capacitor is a fixed plate fixedly installed on the airing rod of the clothes airing machine. The second plate of the capacitor is a floating plate arranged on the clothes hanging side of the airing rod, and can drive the floating plate to displace relative to the fixed plate when the airing rod deforms at the corresponding position. The control unit is connected with the capacitor through the capacitor detection circuit, and is used for detecting the capacitor value of the capacitor to determine the weight of the clothes on the airing rod based on the capacitor value.

2. The laundry weight detection system according to claim 1, characterized by, The first plate and the second plate of the capacitor are arranged on the inner wall of the airing rod, and the length direction is arranged along the axial direction of the airing rod. Alternatively, the first plate and the second plate of the capacitor are arranged on the inner wall of the airing rod, and the length direction is arranged along the radial direction of the airing rod.

3. The laundry weight detection system according to claim 1, characterized by, An elastic connecting piece is arranged between the first plate and the second plate of the capacitor.

4. The laundry weight detection system according to claim 1, characterized by, The capacitive sensing unit comprises one or more capacitors. When the capacitors are multiple, each capacitor is connected with the control unit through the capacitor detection circuit, and is arranged on the airing rod along the length direction of the airing rod.

5. The clothing weight detecting system according to claim 4, wherein When the capacitors are multiple, each capacitor is arranged at each clothes hanging position of the airing rod, or the distance between adjacent two capacitors is a preset distance.

6. The clothing weight detecting system according to claim 1, wherein The capacitor detection circuit comprises a resistor connected in series with the capacitor. The two ends of the capacitor and the resistor connected in series are respectively connected with the positive and negative terminals of the power supply, or the two ends of the capacitor and the resistor connected in series are respectively connected with the IO port of the control unit and the positive terminal of the power supply, or the two ends of the capacitor and the resistor connected in series are respectively connected with the IO port of the control unit and the negative terminal of the power supply. One end of the capacitor and the resistor is connected to the ADC acquisition port of the control unit, and the voltage information acquired through the ADC acquisition port is used to determine the capacitor value of the capacitor.

7. A laundry weight detection method realized based on the laundry weight detection system according to any one of claims 1 to 6, characterized by, The method comprises the following steps: Acquiring the information sensed by the capacitive sensing unit; Determining the capacitor value of the capacitor in the capacitive sensing unit according to the information sensed by the capacitor sensing unit; Determining the weight of the clothes on the airing rod based on the relationship between the capacitor value and the weight of the clothes on the airing rod.

8. The method of claim 7, wherein the weight of the clothes is detected by the weight sensor. When the capacitive sensing unit comprises multiple capacitors, the capacitor values of the capacitors are acquired respectively, and then the final capacitor value is obtained through weighted average processing; Determining the current weight of the clothes on the airing rod based on the relationship between the capacitor value and the weight of the clothes on the airing rod, and according to the final capacitor value.

9. The method of claim 7, wherein the weight of the clothes is detected by using a load cell. The method further comprises the following steps: Acquiring the current temperature and / or humidity information of the environment; Correcting the detected capacitor value according to the current temperature and / or humidity information of the environment; Finally, determining the weight of the clothes on the airing rod based on the relationship between the capacitor value and the weight of the clothes on the airing rod, and according to the corrected capacitor value.

10. A computer program product comprising a computer program, characterized in that, The computer program is executed by a processor to realize the clothes weight detection method in any one of claims 7-8. The computer program is executed by a processor to realize the clothes weight detection method in any one of claims 7-8.

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