Functional sofa, anti-pinch detection method and device thereof, equipment and medium

Abstract

The invention discloses a functional sofa, an anti-pinch detection method and device thereof, equipment and a medium. The functional sofa comprises at least one connecting rod mechanism and an electric push rod for driving the connecting rod mechanism to move. The method comprises the following steps: after detecting that the functional sofa is powered on, acquiring an equivalent capacitance value of a connecting rod mechanism as a capacitance reference value; acquiring an equivalent capacitance value of the connecting rod mechanism according to a preset time period to obtain a current capacitance value; analyzing the current capacitance value and the capacitance reference value through a preset anti-pinch detection strategy, and judging whether a preset anti-pinch protection triggering condition is met or not; if yes, an anti-pinch protection instruction is generated, and the electric push rod is controlled to stop running. By utilizing the characteristic that the equivalent capacitance value is obviously changed when a living body is close to or in contact with the connecting rod mechanism, accurate identification and timely protection of the anti-pinch risk are realized, and the use safety of the functional sofa is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of smart home technology, and in particular to a functional sofa and its anti-pinch detection method, device, equipment and medium. Background Technology

[0002] In the field of functional sofas, the combination of electric push rods and functional iron frames is the mainstream method for achieving sofa posture and angle adjustment. This structure, by driving the iron frame to move, meets the user's needs for different usage states such as sitting and reclining, and has been widely used in various functional sofa products. However, the functional iron frames of existing functional sofas are usually exposed, which can be directly touched by people or pets. For example, the movable metal links in the leg rest area unfold and fold during sofa angle adjustment, thus forming a scissor-like linkage mechanism. Because the movement trajectory of this scissor-like linkage mechanism lacks effective safety protection, when a person or pet's body part accidentally enters the linkage mechanism, they can easily be pinched by the moving metal links, posing a potential threat to the personal safety of users and pets. Currently, there is no effective solution for this safety hazard in functional sofas on the market, resulting in continued safety risks during use and making it difficult to fully guarantee user safety. Therefore, there is an urgent need for a technical solution that can avoid this pinching risk to make up for the shortcomings of existing functional sofas in terms of safety protection. Summary of the Invention

[0003] This invention provides a functional sofa and its anti-pinch detection method, device, equipment and medium, aiming to solve the problem that the scissor linkage mechanism of existing functional sofas lacks effective safety protection and is prone to pinching people or pets.

[0004] In a first aspect, embodiments of the present invention provide an anti-pinch detection method for a functional sofa, the functional sofa comprising at least one linkage mechanism and an electric push rod for driving the linkage mechanism to move, the method comprising: If the functional sofa is detected to be powered on, the equivalent capacitance value of the linkage mechanism is obtained as the capacitance reference value; The current capacitance value is obtained by acquiring the equivalent capacitance value of the linkage mechanism according to a preset time period; Based on the current capacitance value and the capacitance reference value, a preset anti-pinch detection strategy is used to determine whether the preset anti-pinch protection trigger condition is met. If the preset anti-pinch protection trigger condition is met, an anti-pinch protection command is generated and the electric push rod is controlled to stop running according to the anti-pinch protection command.

[0005] Secondly, the present invention also provides a functional sofa, which is applied to the above-mentioned anti-pinch detection method for the functional sofa. The functional sofa includes: at least one linkage mechanism, an electric push rod, a capacitance detection plate, and a control component. The control component is connected to the electric push rod and the capacitance detection plate respectively. The electric push rod is connected to the linkage mechanism and is used to drive the linkage mechanism to move. The capacitance detection plate is electrically connected to the linkage mechanism and is used to detect the equivalent capacitance value of the linkage mechanism.

[0006] Thirdly, the present invention also provides an anti-pinch detection device for a functional sofa, including a unit for performing the above-described method.

[0007] Fourthly, embodiments of the present invention also provide a computer device, the computer device including a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the above-described method.

[0008] Fifthly, embodiments of the present invention also provide a computer-readable storage medium storing a computer program that, when executed by a processor, can implement the above-described method.

[0009] This invention provides a functional sofa and its anti-pinch detection method, device, equipment, and medium. The invention utilizes a capacitance detection board mounted on the linkage mechanism of the functional sofa. After the sofa is powered on, the equivalent capacitance value of the linkage mechanism is first acquired as a capacitance reference value. Then, the current equivalent capacitance value of the linkage mechanism is continuously collected at preset time intervals. A preset anti-pinch detection strategy is used to analyze the current capacitance value and the capacitance reference value to determine whether the anti-pinch protection trigger condition is met. Once the condition is met, an anti-pinch protection command is generated, and the electric push rod is stopped. The triggering logic leverages the characteristic that the equivalent capacitance value of the linkage changes significantly when a human or pet approaches or contacts the linkage mechanism. Through dynamic monitoring and analysis of capacitance parameters, potential pinching risks are accurately identified, and anti-pinch protection actions are triggered promptly. This effectively fills the gap in effective safety protection of existing functional sofa linkage mechanisms, solving the problem of easily pinching people or pets. Ultimately, it achieves the effect of ensuring the safety of functional sofa use with a low-cost solution, reducing false triggers, and improving the accuracy and sensitivity of anti-pinch judgment. Attached Figure Description

[0010] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1This is a schematic diagram of a functional sofa according to an embodiment of the present invention; Figure 2 for Figure 1 Enlarged view of part A; Figure 3 This is a schematic diagram of the electrical connections of the functional sofa according to an embodiment of the present invention; Figure 4 This is a flowchart illustrating the steps of the anti-pinch detection method for a functional sofa according to an embodiment of the present invention. Figure 5 for Figure 4 A schematic diagram of the sub-steps of S130; Figure 6 for Figure 4 A schematic diagram of another sub-step of S130; Figure 7 This is a flowchart illustrating the steps of an anti-pinch detection method for a functional sofa according to another embodiment of the present invention; Figure 8 for Figure 7 A schematic diagram of the sub-steps of S150; Figure 9 This is a flowchart illustrating the steps of an anti-pinch detection method for a functional sofa according to another embodiment of the present invention. Figure 10 for Figure 9 A schematic diagram of the sub-steps of S170; Figure 11 This is a schematic block diagram of a functional sofa and its anti-pinch detection device according to an embodiment of the present invention; Figure 12 This is a schematic block diagram of a computer device provided in an embodiment of the present invention.

[0012] Figure label: 1. Linkage mechanism; 11. First metal link; 12. Second metal link; 13. Conductive riveting component; 2. Electric push rod; 3. Capacitor detection board; 4. Control component; 5. Wire; 6. Warning light assembly; 7. Switching power supply; 8. Power cord; 9. Hand controller. Detailed Implementation

[0013] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. 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.

[0014] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0015] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0016] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0017] As used in this specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."

[0018] As people's living standards improve, functional sofas are becoming increasingly popular due to their adjustable posture and enhanced comfort. They typically use an electric push rod to drive a linkage mechanism to change the sofa's angle and position. However, the linkage mechanism of existing functional sofas, especially the scissor-type linkage structure, is often exposed on the outside of the sofa. During sofa adjustment, relative movement occurs between the metal linkages, resulting in dynamic changes such as unfolding and folding. When a human or pet's limbs accidentally enter this movement mechanism, they can easily be pinched and injured by the moving linkages. Currently, the market lacks real-time and effective active safety protection measures, mainly relying on passive methods such as user attention or mechanical limits. These methods cannot identify and stop the movement in time before a danger occurs, thus posing a continuous threat to the safety of people and pets.

[0019] To address this issue, this invention proposes a functional sofa and its anti-pinch detection method, device, equipment, and medium. Active anti-pinch protection is achieved by real-time monitoring of changes in the equivalent capacitance value of the sofa's linkage mechanism. Specifically, when the sofa is powered on, the equivalent capacitance value of the linkage mechanism is acquired as a capacitance reference value. The current capacitance value is continuously acquired according to a preset time period. A preset anti-pinch detection strategy is then used to compare the current capacitance value with the capacitance reference value to determine whether the anti-pinch protection trigger condition is met. When a person or pet approaches or enters the linkage mechanism, their body parts alter the electric field distribution around the linkage, causing a significant change in the equivalent capacitance value. The system identifies this abnormal change through capacitance value comparison and immediately generates an anti-pinch protection command, controlling the electric push rod to stop operating. This interrupts the linkage movement before the risk of pinching occurs, effectively solving the problem of existing functional sofas easily pinching people or pets due to the lack of effective safety protection in the linkage mechanism. Ultimately, it achieves real-time, non-contact detection and active protection against pinching risks, significantly improving the safety of functional sofa use. Details are as follows: Reference Figures 1-3 First, the structure of the functional sofa according to an embodiment of the present invention will be described. The functional sofa includes: at least one linkage mechanism 1, an electric push rod 2, a capacitance detection plate 3, and a control component 4. The control component 4 is connected to the electric push rod 2 and the capacitance detection plate 3 respectively. The electric push rod 2 is connected to the linkage mechanism 1 and is used to drive the linkage mechanism 1 to move. The capacitance detection plate 3 is electrically connected to the linkage mechanism 1 and is used to detect the equivalent capacitance value of the linkage mechanism 1.

[0020] Specifically, the functional sofa includes at least one linkage mechanism 1, an electric push rod 2, a capacitance detection board 3, and a control component 4. The control component 4 can be a control box. The control component 4 is connected to the electric push rod 2 and the capacitance detection board 3 respectively. The control component 4 is also connected to a power cord 8 through a switching power supply 7 and a hand controller 9. The electric push rod 2 is driven by the linkage mechanism 1. The linkage mechanism 1 can include a left linkage mechanism and a right linkage mechanism. The electric push rod 2 is used to receive the drive signal from the control component 4 to drive the linkage mechanism 1 to perform posture adjustment. The capacitance detection board 3 is electrically connected to the linkage mechanism 1 and is used to detect the equivalent capacitance value of the linkage mechanism 1 in real time and transmit the detection data to the control component 4. To address the issue of existing functional sofas lacking effective safety detection components in their linkage mechanism 1, thus failing to identify the approach or contact of objects, this embodiment incorporates a capacitance detection board 3 electrically connected to the linkage mechanism 1. Combined with the linkage between the control component 4 and the electric push rod 2, the control component 4 can determine the safety status based on the detection data from the capacitance detection board 3. When a person or pet approaches the linkage, their body alters the electric field distribution, causing an abnormal change in the equivalent capacitance value, triggering the anti-pinch protection mechanism. This solves the technical problem of the linkage mechanism 1 lacking a safety detection mechanism and easily leading to pinching injuries. This structural design achieves real-time, non-contact detection of pinching risk and promptly stops the electric push rod 2 before a danger occurs, enhancing the sofa's active safety protection capabilities.

[0021] In one embodiment, the linkage mechanism 1 includes a left linkage mechanism and a right linkage mechanism, and the capacitance detection plate 3 is electrically connected to the left linkage mechanism and the right linkage mechanism respectively. The capacitance detection plate 3 is used to detect the equivalent capacitance value of the left linkage mechanism and the right linkage mechanism.

[0022] Specifically, the linkage mechanism 1 includes a left linkage mechanism and a right linkage mechanism, both driven by an electric push rod 2. A capacitance detection board 3 is electrically connected to each of the left and right linkage mechanisms, allowing the board to independently acquire the equivalent capacitance values ​​of each mechanism and transmit the two sets of data to the control component 4. If only a single detection loop is used, the safety status of the left and right linkage mechanisms 1 cannot be distinguished, leading to missed detections. For example, if only the left linkage mechanism triggers the anti-pinch function while the right linkage mechanism does not, a missed detection will occur. This embodiment solves the problem of missed detections caused by single-sided detection by dividing the linkage mechanism 1 into left and right sides and electrically connecting them to the capacitance detection board 3, allowing the control component 4 to determine the safety status of both sides individually or simultaneously. This dual-sided detection design enables independent safety monitoring of the left and right linkage mechanisms 1, enhancing the accuracy and reliability of anti-pinch detection and ensuring effective identification regardless of which side the foreign object enters from.

[0023] In one embodiment, the linkage mechanism 1 includes a first metal link 11, a second metal link 12, and a conductive riveting member 13. The end of the first metal link 11 and the end of the second metal link 12 are riveted together by the conductive riveting member 13. The end of the first metal link 11 and the end of the second metal link 12 are electrically connected to the capacitance detection plate 3 by a lead wire 5 through the conductive riveting member 13.

[0024] Reference Figure 2 Specifically, the linkage mechanism 1 includes a first metal link 11, a second metal link 12, and a conductive riveting member 13. The ends of the first metal link 11 and the second metal link 12 are riveted together by the conductive riveting member 13. A wire 5 is led out from the conductive riveting member 13, and this wire 5 forms an electrical connection with the capacitance detection board 3, allowing the capacitance signals of the first metal link 11 and the second metal link 12 to be transmitted to the capacitance detection board 3 through the wire 5. In particular, the existing linkage mechanism 1 lacks a stable electrical connection structure between the metal links, making it impossible to form a unified capacitance detection object, resulting in chaotic detection signals. Therefore, this embodiment uses a conductive riveting member 13 to achieve integrated fixing and conductivity of the two metal rods. The conductive riveting member 13 not only achieves mechanical connection but also makes the two metal rods electrically connected, forming a unified electric field detection area. This avoids the electric field separation caused by the relative movement of the rods, which would interfere with the detection accuracy, and solves the technical problem that the metal rods cannot stably transmit capacitance signals. Through this structural design, the two metal rods form a unified capacitance detection carrier, ensuring the stability and reliability of capacitance detection, ensuring the stability and consistency of the capacitance detection signal, and improving the sensitivity to foreign object interference.

[0025] In this embodiment, the outer sides of the first metal connecting rod 11 and the second metal connecting rod 12 are provided with an insulating layer.

[0026] Specifically, both the outer sides of the first metal link 11 and the second metal link 12 are provided with an insulating layer through an electrophoretic process. This insulating layer is formed by uniformly depositing electrophoretic paint onto the outer surface of the metal link under the action of an electric field, covering the entire outer area of ​​the metal link, except for the end area connected to the conductive riveting part 13, which is not electrophoretically treated to ensure the conductivity of this end area with the conductive riveting part 13. If the outer side of the metal link is not provided with an insulating layer through an electrophoretic process, it is easy to cause electrical interference with other components, resulting in distortion of the capacitance detection value. Therefore, this embodiment uses an electrophoretic process to form an insulating layer on the outer side of the metal link. By utilizing the uniform film formation and strong adhesion characteristics of the electrophoretic process, it effectively avoids misleading communication between different links or between links and other metal components, and solves the technical problem that capacitance detection is easily affected by external electrical interference. Through this electrophoretic insulation design, it can reliably isolate interference from external irrelevant electrical signals and protect the metal link, improving the anti-interference capability and reliability of capacitance detection, ensuring the accuracy of the data collected by the capacitance detection board 3, and providing reliable data support for anti-pinch determination.

[0027] In this embodiment, the linkage mechanism 1 further includes a conductive washer, which is sleeved on the outside of the conductive riveting member 13 and located between the end of the first metal link 11 and the end of the second metal link 12.

[0028] Specifically, the linkage mechanism 1 also includes a conductive washer (not shown in the figure). The conductive washer is sleeved on the outside of the conductive riveting member 13 and located between the end of the first metal link 11 and the end of the second metal link 12. The conductive washer is tightly fitted to the ends of the first metal link 11 and the second metal link 12, respectively, increasing the conductive contact area and cooperating with the conductive riveting member 13 to achieve reliable conduction between the two metal links. Specifically, the conductive riveting member 13 alone may result in insufficient conduction between the two metal links, leading to unstable capacitance signal transmission. This embodiment improves the conductive contact area between the first metal link 11 and the second metal link 12 by adding a conductive washer, thus solving the problem of low reliability of conduction between the two metal links. The conductive washer ensures stable conduction between the two metal links, enabling the capacitance detection plate 3 to obtain a continuous and stable equivalent capacitance value, thereby improving the stability of the detection system.

[0029] In this embodiment, the functional sofa also includes a sofa cushion, the capacitance detection board 3 is fixed to the bottom of the sofa cushion, and the wire 5 runs along the first metal connecting rod 11 and / or the second metal connecting rod 12 and is connected to the capacitance detection board 3.

[0030] Reference Figure 2Specifically, the functional sofa also includes a sofa cushion. The capacitance detection board 3 is fixedly installed at the bottom of the sofa cushion by wrapping, thus achieving concealment. The wires 5 led out from the conductive rivet 13 run along the surface of the first metal connecting rod 11 and / or the second metal connecting rod 12 and are fixed, ultimately achieving electrical connection with the capacitance detection board 3. In particular, if the capacitance detection board 3 is improperly installed or the wires 5 are messy, the connection may become loose due to sofa movement. It may also occupy extra space and affect the user experience of the sofa. This embodiment solves the technical problems of unreasonable installation of detection components and easy loosening of wires 5 by hiding the capacitance detection board 3 at the bottom of the sofa cushion and fixing the wires 5 along the connecting rods. Through this installation and wiring design, the capacitance detection board 3 is installed in a concealed manner, without affecting the appearance and user experience of the sofa, while ensuring the stability of the wire connection and extending the service life of the detection system.

[0031] In one embodiment, the functional sofa further includes a warning light assembly 6, which is connected to the control assembly 4.

[0032] Reference Figure 3 Specifically, the functional sofa also includes a warning light assembly 6. The warning light assembly 6 can be, for example, an LED strip, and can be installed on the side of the seat cushion or leg rest. The warning light assembly 6 is electrically connected to the control assembly 4, enabling it to receive control signals sent by the control assembly 4 and execute corresponding warning actions. Specifically, existing functional sofas lack effective warning mechanisms even when the anti-pinch protection is triggered, and users may not be aware of the risk in a timely manner. This embodiment solves the technical problem of the lack of warning function in anti-pinch protection by connecting the warning light assembly 6 to the control assembly 4, allowing the control assembly 4 to drive the warning light assembly 6 to issue a warning when it determines there is a risk of pinching. Through the installation of this warning light assembly 6, the safety risk can be promptly reported to the user, reminding them to stay away from dangerous areas, further improving the safety and user experience of the functional sofa.

[0033] Please see Figure 4 , Figure 4 This is a flowchart illustrating the steps of an anti-pinch detection method for a functional sofa provided in an embodiment of the present invention. The functional sofa includes at least one linkage mechanism and an electric push rod for driving the linkage mechanism. It is understood that this method can also be applied to the functional sofa described in the above embodiment, which has been described in detail above; for the sake of brevity, it will not be repeated here. The method includes steps S110-S140.

[0034] S110. If the functional sofa is detected to be powered on, the equivalent capacitance value of the linkage mechanism is obtained as the capacitance reference value. In this embodiment, the equivalent capacitance value refers to a single value measured by the capacitance detection plate for the overall capacitance state of the linkage mechanism. It integrates the combined effects of all factors, including the capacitance of the metal linkage itself, the coupling capacitance between linkages, and the parasitic capacitance caused by ambient temperature and humidity. The capacitance reference value refers to the equivalent capacitance value of the linkage mechanism obtained at the initial stage of powering on the sofa, which serves as a reference benchmark for subsequent capacitance change judgment.

[0035] Specifically, the first step is to check the power-on status of the sofa. Once the sofa is successfully powered on, the capacitance detection board immediately begins acquiring the equivalent capacitance value of the linkage mechanism. During the acquisition process, the capacitance detection board receives capacitance signals through leads electrically connected to the linkage mechanism. After filtering, amplifying, and other preprocessing of the signals, the initial equivalent capacitance value is calculated. This initial equivalent capacitance value is then stored as a capacitance reference value, providing basic reference data for subsequent anti-pinch detection. Specifically, existing sofas lack an initial capacitance reference standard, making it difficult to accurately determine whether capacitance changes are caused by dangerous situations. This step establishes a reference system for judging capacitance changes by acquiring the initial equivalent capacitance value upon power-on, solving the technical problem of lacking a unified reference standard for anti-pinch detection. This step provides a stable and reliable initial reference for the entire anti-pinch detection process, ensuring that the subsequent judgment of capacitance changes has a clear standard and laying the foundation for the accuracy of anti-pinch detection.

[0036] S120. Obtain the current capacitance value by acquiring the equivalent capacitance value of the linkage mechanism according to a preset time period; In this embodiment, the preset time period refers to the time interval at which the capacitance detection board continuously collects the equivalent capacitance value of the linkage mechanism, for example, 500 milliseconds; the current capacitance value refers to the real-time equivalent capacitance value of the linkage mechanism collected by the capacitance detection board according to the preset time period.

[0037] Specifically, the capacitance detection board first starts collecting data according to a pre-set fixed time period. During the data acquisition process, the capacitance detection board continuously receives capacitance signals from the linkage mechanism through leads. Each received signal undergoes the same preprocessing and calculation as the initial acquisition to obtain the real-time equivalent capacitance value, i.e., the current capacitance value. The current capacitance value obtained from each acquisition is then temporarily stored for subsequent comparison and analysis with a capacitance reference value. The data acquisition process continues until the sofa is powered off or the anti-pinch protection is triggered. Specifically, existing functional sofas cannot monitor capacitance changes in the linkage mechanism in real time, leading to an inability to promptly detect potential pinching risks. This step, by continuously acquiring the current capacitance value at a preset time period, achieves dynamic monitoring of the capacitance state of the linkage mechanism, solving the technical problem of not being able to capture capacitance changes in real time. Through this step, the capacitance state data of the linkage mechanism can be obtained in real time, ensuring that capacitance changes at any time can be captured promptly, providing data support for the timely triggering of anti-pinch protection.

[0038] S130. Based on the current capacitance value and the capacitance reference value, determine whether the preset anti-pinch protection trigger condition is met by using a preset anti-pinch detection strategy. In this embodiment, the preset anti-pinch detection strategy refers to the algorithm or set of rules used by the control component to analyze the relationship between the current capacitance value and the capacitance reference value. This strategy defines how to identify the risk of pinching from the change in capacitance value. The preset anti-pinch protection trigger condition refers to the specific standard or threshold set according to the anti-pinch detection strategy to determine whether anti-pinch protection needs to be triggered.

[0039] Specifically, after acquiring the current capacitance value, the control component first reads the previously saved capacitance reference value from the memory. Then, it compares and analyzes the current capacitance value and the capacitance reference value according to a preset anti-pinch detection strategy. This anti-pinch detection strategy can include various algorithms such as difference comparison method, ratio comparison method, trend analysis method, or pattern recognition method. If the difference comparison method is used, the difference between the current capacitance value and the capacitance reference value is calculated, and then the difference is compared with a preset capacitance difference threshold. If the ratio comparison method is used, the ratio between the current capacitance value and the capacitance reference value is calculated, and then the ratio is compared with a preset ratio threshold. If the trend analysis method is used, the capacitance value change rate is analyzed over multiple consecutive time periods, and then it is determined whether the change rate exceeds a preset change rate threshold. After completing the comparison analysis, the control component determines whether the preset anti-pinch protection trigger condition is met based on the comparison result. This trigger condition can be set as a difference greater than or equal to a preset capacitance difference threshold, or a ratio exceeding a preset ratio threshold, or a change rate exceeding a preset change rate threshold, or a combination of multiple conditions. Specifically, this step addresses the problem of accurately identifying pinch risk from changes in capacitance value by pre-setting anti-pinch detection strategies and triggering conditions. Since capacitance changes can be caused by various factors, only a reasonable detection strategy and triggering conditions can distinguish between normal environmental interference and genuine pinch risk. The pre-set detection strategy and triggering conditions effectively filter false alarms and improve detection accuracy. By employing a scientific anti-pinch detection strategy and reasonable triggering conditions, accurate identification and judgment of pinch risk are achieved, providing a reliable basis for timely triggering of anti-pinch protection.

[0040] In one embodiment, such as Figure 5 As shown, step S130 includes: S131a-S132a.

[0041] S131a. Determine the capacitance difference based on the current capacitance value and the capacitance reference value, and determine whether the capacitance difference is greater than or equal to a preset capacitance difference threshold. S132a. If the capacitance difference is greater than or equal to the preset capacitance difference threshold, it is determined that the preset anti-pinch protection trigger condition is met.

[0042] In this embodiment, the capacitance difference refers to the numerical difference between the current capacitance value and the capacitance reference value, and the preset capacitance difference threshold refers to a pre-set capacitance difference standard used to determine whether there is a risk of pinching injury.

[0043] Specifically, the process first extracts the latest collected current capacitance value and the initially set capacitance reference value from the storage unit. Then, it calculates the difference between the current capacitance value and the capacitance reference value using arithmetic subtraction, obtaining the capacitance difference. Subsequently, the calculated capacitance difference is compared with a preset capacitance difference threshold to determine if the difference reaches or exceeds the threshold. If it does, the preset anti-pinch protection trigger condition is met; otherwise, the condition is not met. In essence, this step uses the capacitance difference to determine the risk of pinching injury, solving the problem of how to quantify the degree of capacitance value change to identify the risk of pinching injury. This is because when a person or pet approaches the linkage mechanism, the capacitance value increases significantly, while capacitance changes caused by environmental factors are usually smaller. By setting a reasonable difference threshold, normal fluctuations and dangerous situations can be effectively distinguished. For example, assuming the reference capacitance value is 1000 and the current capacitance value is 1010, the capacitance difference is calculated by subtracting 1000 from 1010, resulting in a value of 10. If the preset capacitance difference threshold is 60, then 10 is less than 60, and this is considered normal fluctuation, not meeting the anti-pinch trigger condition. If the current capacitance value is 1070, the calculated capacitance difference is 70, which is greater than 60, thus meeting the anti-pinch protection trigger condition. This step enables rapid determination of capacitance changes, is simple to operate, and has a fast response, allowing for timely identification of potential pinch risks and improving the accuracy and reliability of anti-pinch detection.

[0044] In one embodiment, such as Figure 6 As shown, step S130 includes: S131b-S133b.

[0045] S131b: Determine the left capacitance difference based on the current capacitance value and the capacitance reference value corresponding to the left linkage mechanism, and determine whether the left capacitance difference is greater than or equal to a preset left capacitance difference threshold. S132b: Determine the right capacitance difference based on the current capacitance value and the capacitance reference value corresponding to the right linkage mechanism, and determine whether the right capacitance difference is greater than or equal to the preset right capacitance difference threshold. S133b. If the left capacitance difference is greater than or equal to the preset left capacitance difference threshold and / or the right capacitance difference is greater than or equal to the preset right capacitance difference threshold, then the preset anti-pinch protection trigger condition is satisfied.

[0046] In this embodiment, the left capacitance difference refers to the difference between the current capacitance value of the left linkage mechanism and the corresponding left capacitance reference value, and the right capacitance difference refers to the difference between the current capacitance value of the right linkage mechanism and the corresponding right capacitance reference value. The preset left capacitance difference threshold and the preset right capacitance difference threshold refer to the preset capacitance difference standards used to determine whether there is a risk of pinching injury in the left and right linkage mechanisms, respectively.

[0047] Specifically, firstly, the current capacitance value of the left linkage mechanism and its reference value for the left side are retrieved, and the current capacitance value of the right linkage mechanism and its reference value for the right side are retrieved. Then, arithmetic subtraction is performed on the two sets of values ​​to obtain the capacitance difference for the left and right sides. Subsequently, the capacitance difference for the left side is compared with a preset left-side capacitance difference threshold, and the capacitance difference for the right side is compared with a preset right-side capacitance difference threshold. It is determined whether the capacitance difference for the left side is greater than or equal to the preset left-side capacitance difference threshold, and simultaneously whether the capacitance difference for the right side is greater than or equal to the preset right-side capacitance difference threshold. If either the left or right side meets this condition, or both sets meet it, then the preset anti-pinch protection trigger condition is satisfied. In essence, this step solves the problem of how to achieve independent anti-pinch detection for the linkage mechanisms on both sides of a functional sofa by separately monitoring the capacitance difference between the left and right linkage mechanisms. This is because the left and right linkage mechanisms of a functional sofa may be in different states of motion, and foreign objects may only approach from one side. Independent detection can more accurately locate the source of risk and avoid missed or false detections caused by unilateral detection. For example, assuming the reference value of the left-side capacitor is 1000, the current left-side capacitor value is 1080, and the preset threshold for the left-side capacitor difference is 60, the calculated left-side capacitor difference is 80, which is greater than 60. The reference value of the right-side capacitor is 1000, the current right-side capacitor value is 1020, and the preset threshold for the right-side capacitor difference is 60, the calculated right-side capacitor difference is 20, which is less than 60. In this case, since the left side meets the condition, the anti-pinch protection trigger condition is met. If the capacitor differences on the left and right sides are 50 and 40 respectively, both less than the corresponding thresholds, the trigger condition is not met. Through this step, independent anti-pinch determination of the left and right linkage mechanisms is achieved, improving the targeting and accuracy of anti-pinch detection, and protecting the safety of both the left and right sides separately.

[0048] In one embodiment, step S130 includes: S131c-S132c.

[0049] S131c: Determine the capacitance ratio value based on the current capacitance value and the capacitance reference value, and determine whether the capacitance ratio value is greater than or equal to a preset capacitance ratio value threshold. S132c. If the capacitance ratio value is greater than or equal to the preset capacitance ratio value threshold, then it is determined that the preset anti-pinch protection trigger condition is met.

[0050] In this embodiment, the capacitance ratio value refers to the ratio of the current capacitance value to the capacitance reference value, and the preset capacitance ratio threshold value refers to a pre-set capacitance ratio standard used to determine whether there is a risk of pinching injury.

[0051] Specifically, the process first retrieves the current capacitance value and the reference capacitance value from the storage module to ensure the validity and timeliness of both data. Then, it calculates the ratio of the current capacitance value to the reference capacitance value using a division operation, obtaining the capacitance ratio value. Subsequently, it compares the calculated capacitance ratio value with a preset capacitance ratio threshold to determine if the capacitance ratio value is greater than or equal to the threshold. If so, it determines that there is a risk of pinching injury, thus meeting the preset anti-pinch protection trigger condition. In essence, this step, which uses the capacitance ratio value to determine the risk of pinching injury, solves the problem of difficulty in uniformly setting thresholds due to differences in the absolute values ​​of capacitance values ​​caused by variations in size and material of different linkage mechanisms. This is because the ratio value can eliminate the influence of differences in the reference value, making the anti-pinch detection strategy more universal and adaptable. For example, assuming the reference capacitance value is 1000 and the current capacitance value is 1060, the calculated capacitance ratio is 1060 divided by 1000, which equals 1.06. If the preset capacitance ratio threshold is 1.05, then 1.06 is greater than 1.05, and the anti-pinch trigger condition is met. If the current capacitance value is 1040, the calculated capacitance ratio is 1.04, which is less than 1.05, and the trigger condition is not met. If the reference capacitance value is 1200 and the current capacitance value is 1260, the ratio is 1.05, reaching the threshold, and the trigger condition is met. Through this step, a stable determination is achieved regardless of the magnitude of the reference capacitance value, eliminating the influence of differences in reference values ​​between different linkage mechanisms, and improving the versatility and adaptability of the anti-pinch detection strategy.

[0052] In one embodiment, step S130 includes: S131d-S132d.

[0053] S131d: Determine the capacitance change rate based on the current capacitance value and the capacitance reference value, and determine whether the capacitance change rate is greater than or equal to a preset capacitance change rate threshold. S132d. If the capacitance change rate is greater than or equal to the preset capacitance change rate threshold, then the preset anti-pinch protection trigger condition is satisfied. In this embodiment, the capacitance change rate refers to the amount of change in capacitance value per unit time, and the preset capacitance change rate threshold refers to a pre-set standard for the capacitance change rate used to determine whether there is a risk of pinching injury.

[0054] Specifically, the process begins by recording the time point corresponding to each capacitance value acquisition to ensure accuracy. Next, the current capacitance value and corresponding time are selected within two or more consecutive acquisition cycles. The difference between the two adjacent capacitance values ​​is calculated and divided by the time interval between the two acquisitions to obtain the capacitance change per unit time, i.e., the capacitance change rate. This calculated capacitance change rate is then compared with a preset capacitance change rate threshold to determine if it is greater than or equal to the threshold. If so, a sudden pinch risk is identified, fulfilling the preset anti-pinch protection trigger condition. In essence, existing methods that rely solely on differences or ratios are insufficient to identify instantaneous sudden capacitance changes, easily missing the optimal protection window. This step, by monitoring the capacitance change rate, can quickly capture sudden risks, solving the technical problem of difficulty in timely identification of instantaneous pinch risk. For example, assuming a preset time period of 500 milliseconds, a previously collected capacitance value of 1000, a currently collected capacitance value of 1100, and a time interval of 0.5 seconds, the calculated capacitance change rate is (1100-1000) / 0.5=200. If the preset capacitance change rate threshold is 150, then 200 is greater than 150, and the anti-pinch trigger condition is met. If the current capacitance value is 1050, the calculated change rate is (1050-1000) / 0.5=100, which is less than 150, and the trigger condition is not met. This step enables rapid identification of instantaneous sudden capacitance changes, improving the response speed of the anti-pinch protection and effectively preventing sudden pinching accidents.

[0055] In one embodiment, step S130 includes: S131e-S132e.

[0056] S131e. Establish a capacitance value change characteristic curve based on the capacitance reference value and its corresponding acquisition time node, and multiple current capacitance values ​​and their corresponding acquisition time nodes. S132e. Input the capacitance value change characteristic curve into the pre-trained anti-pinch protection trigger model for identification and output the identification result. If the identification result is to trigger anti-pinch protection, it is determined that the preset anti-pinch protection trigger condition is met. In this embodiment, the capacitance value change characteristic curve refers to the curve drawn with the acquisition time as the horizontal axis and the capacitance value as the vertical axis, based on the capacitance reference value and its acquisition time node and multiple current capacitance values ​​and their acquisition time nodes. The anti-pinch protection trigger model refers to the machine learning model used to identify whether the capacitance change curve corresponds to the risk of pinching injury, and can adopt decision tree model, support vector machine model or neural network model, etc.

[0057] Specifically, the control component first retrieves the capacitance reference value and its corresponding acquisition time node from the memory, and simultaneously acquires multiple current capacitance values ​​and their corresponding acquisition time nodes. Then, a coordinate system is established with time as the x-axis and capacitance value as the y-axis. Next, the capacitance reference value and each current capacitance value are plotted on the coordinate system according to their corresponding time nodes, forming a capacitance value change characteristic curve. This characteristic curve is then input into a pre-trained anti-pinch protection trigger model. The model performs feature extraction and pattern recognition on the characteristic curve and outputs the recognition result. If the recognition result indicates that anti-pinch protection is triggered, the preset anti-pinch protection trigger condition is met; if the recognition result indicates that anti-pinch protection is not triggered, the preset anti-pinch protection trigger condition is not met. In essence, this step, using the anti-pinch protection trigger model for identification, solves the problem of accurately identifying pinch risk from complex capacitance value change patterns. Because capacitance value changes in actual use may be affected by various factors, simple threshold judgment is insufficient to handle complex scenarios. Machine learning models can learn capacitance value change patterns under various pinch scenarios, achieving more accurate identification.

[0058] The model training process is as follows: First, capacitance change data under various scenarios are collected, including normal movement, foreign object intervention, environmental interference, and fault scenarios. Capacitance change feature curves and corresponding labels are extracted for each scenario. Scenarios involving foreign objects are labeled as triggering anti-pinch protection, while other scenarios are labeled as not triggering. These labeled feature data are then divided into training and testing sets. The selected model is trained using the training set, and the training effect is optimized by adjusting model parameters. The model is then validated using the testing set until the model's recognition accuracy reaches a preset standard, completing the model training. For example, when the capacitance change feature curve shows a rapid increase with a large slope in a short period, without obvious periodic fluctuations, after inputting it into the trained neural network model, the model recognizes that the curve matches the characteristics of foreign object intervention and outputs a result indicating that anti-pinch protection is triggered, thus determining that the triggering condition is met. If the curve shows slow fluctuations and matches the characteristics of environmental interference, a result indicating that it is not triggered is output. Through this step, accurate identification of complex capacitance change scenarios is achieved, effectively distinguishing between normal interference and real risks, and significantly improving the intelligence and accuracy of anti-pinch judgment.

[0059] In one embodiment, step S130 includes: S131f-S132f.

[0060] S131f: Establish a capacitance value change characteristic curve based on the capacitance reference value and its corresponding acquisition time node, and multiple current capacitance values ​​and their corresponding acquisition time nodes; S132f: Perform similarity matching between the capacitance value change characteristic curve and each preset change characteristic curve in the preset feature library, and output the matching result. If the matching result triggers anti-pinch protection, it is determined that the preset anti-pinch protection trigger condition is met.

[0061] In this embodiment, the preset feature library refers to a database that stores characteristic curves of capacitance value change under various typical scenarios. The preset characteristic curves include curves for normal motion mode, curves for foreign object intervention mode, and curves for environmental interference mode. Similarity matching refers to calculating the degree of similarity between the real-time capacitance value change characteristic curve and the preset characteristic curve.

[0062] Specifically, firstly, based on the capacitance reference value and its acquisition time, and multiple current capacitance values ​​and their acquisition times, a real-time capacitance value change characteristic curve is plotted to ensure the completeness and accuracy of the curve plotting. Secondly, all preset change characteristic curves are retrieved from a preset feature library. Then, a curve similarity calculation algorithm, such as cosine similarity calculation, dynamic time warping algorithm, or Euclidean distance algorithm, is used to calculate the similarity between the real-time curve and each preset curve to obtain the matching result. If the similarity between the real-time curve and the foreign object intervention mode curve reaches or exceeds the preset similarity standard, the matching result triggers the anti-pinch protection, and the preset anti-pinch protection triggering condition is met. In particular, this step uses feature curve matching for identification, solving the problem of how to identify pinch risk using historical experience data. Because the feature curves in the preset feature library are typical patterns summarized from a large amount of experimental data, by matching the current curve with the preset curves, it is possible to quickly determine whether the current situation is similar to a known dangerous pattern without the need for a complex model training process. For example, a preset feature library stores feature curves showing a rapid increase in capacitance when a foreign object is involved. If the real-time plotted capacitance change curve shows an increase from 1000 to 1100 within 1 second, and the similarity between this curve and the foreign object involvement pattern curve is calculated to be 90% using a dynamic time warping algorithm, and if the preset similarity standard is 80%, then the matching result is that anti-pinch protection is triggered, and the triggering condition is met. If the real-time curve shows slow fluctuations and the similarity with the environmental interference pattern curve is 85%, then the matching result is that anti-pinch protection is not triggered. Through this step, rapid and accurate matching of typical pinching scenarios is achieved, anti-pinch detection based on historical experience data is realized, and situations similar to known dangerous patterns can be quickly identified, improving the efficiency and reliability of anti-pinch determination and enabling rapid response to common safety risks.

[0063] S140. If the preset anti-pinch protection trigger condition is met, an anti-pinch protection command is generated and the electric push rod is controlled to stop running according to the anti-pinch protection command.

[0064] In this embodiment, the anti-pinch protection command refers to the control signal generated when a risk of pinching injury is determined to exist, which is used to initiate a safety protection action.

[0065] Specifically, when the preset anti-pinch detection strategy determines that the preset anti-pinch protection trigger condition is met, the control component immediately generates an anti-pinch protection command. This command is then transmitted to the drive module connected to the electric push rod. Upon receiving the command, the drive module quickly cuts off the drive power to the electric push rod or stops sending drive signals, causing the electric push rod to stop running. This, in turn, stops the linkage mechanism, preventing further movement and potential pinching injuries. In other words, existing functional sofas cannot stop moving in time after detecting a potential pinching risk, leading to pinching accidents. This step, by generating an anti-pinch protection command and controlling the electric push rod to stop running when the trigger condition is met, establishes a risk response mechanism, solving the technical problem of not being able to stop the machine in time after a risk occurs. Through this step, the linkage mechanism can be stopped immediately upon determining a pinching risk, effectively preventing pinching accidents and achieving active safety protection. This effectively prevents people or pets from being pinched by the linkage mechanism, significantly improving the safety of functional sofas.

[0066] In one embodiment, such as Figure 7 As shown, the method further includes step S150.

[0067] S150. If the preset anti-pinch protection trigger condition is not met, the preset step-by-step approximation method is used to update the capacitor reference value so that the capacitor reference value approaches the current capacitor value; return to the step of obtaining the equivalent capacitance value of the linkage mechanism according to the preset time period to obtain the current capacitance value.

[0068] In this embodiment, the preset approximation method refers to a reference value update method that gradually adjusts the capacitance reference value according to preset rules, so that the capacitance reference value continuously approaches the current capacitance value.

[0069] Specifically, after determining the preset anti-pinch protection trigger condition, if the condition is not currently met, a preset stepwise approximation method is initiated. The capacitance reference value is then updated based on this method, making the updated value closer to the current capacitance value obtained in this acquisition. After updating the capacitance reference value, the process returns to the step of obtaining the equivalent capacitance value of the linkage mechanism according to a preset time period to obtain the current capacitance value (S120), and then proceeds to the next cycle of capacitance acquisition and anti-pinch judgment. Specifically, existing anti-pinch detection schemes often use fixed capacitance reference values, which cannot adapt to the natural drift of capacitance values ​​caused by changes in linkage angle and fluctuations in ambient temperature and humidity. This easily leads to misjudgments or missed judgments in subsequent anti-pinch assessments. This embodiment uses a preset stepwise approximation method to continuously and slowly follow the normal trend of the capacitance value for correction, ensuring the reference value always closely matches the current true state. This effectively suppresses erroneous actions caused by environmental interference, allowing the reference value to dynamically adjust with normal capacitance fluctuations, thus solving the technical problem of inaccurate judgments caused by fixed reference values ​​being easily affected by external interference. This step enables dynamic optimization of the capacitance reference value, effectively filtering out the influence of normal interference factors on capacitance detection and improving the accuracy and sensitivity of anti-pinch judgment.

[0070] In one embodiment, such as Figure 8 As shown, step S150 includes: S151-S153.

[0071] S151. The capacitance reference value is updated gradually towards the current capacitance value according to a preset time interval and a preset step size; S152. Determine whether the capacitor reference value is equal to the current capacitor value; S153. If the capacitor reference value is equal to the current capacitor value, then stop updating the capacitor reference value.

[0072] In this embodiment, the preset time interval refers to the time difference between two adjacent updates of the capacitor reference value, and the preset step size refers to the fixed value adjusted each time the capacitor reference value is updated.

[0073] Specifically, firstly, a preset time interval and preset step size are determined for updating the capacitor reference value. Secondly, the capacitor reference value update program is started according to the preset time interval. During each update, the capacitor reference value is adjusted towards the current capacitance value according to the preset step size, making the adjusted capacitor reference value closer to the current capacitance value. Then, it is determined whether the updated capacitor reference value is equal to the current capacitance value. If the two values ​​are equal, the update operation is stopped immediately. If the two values ​​are not equal, the next update is performed according to the preset time interval and preset step size. In particular, if the update of the capacitor reference value lacks a fixed rule, the reference value may be adjusted too quickly or too slowly. Adjusting too quickly will cause the reference value to excessively follow instantaneous fluctuations, while adjusting too slowly will fail to adapt to the natural drift of the capacitance in time. This step establishes a standardized reference value adjustment mechanism by setting a preset time interval and preset step size to gradually update the capacitor reference value and stop updating when the reference value is equal to the current capacitance value, thus solving the technical problem of poor adjustment effect caused by irregular reference value updates. For example, assuming the initial capacitance reference value is 1000, due to changes in sofa angle or fluctuations in ambient temperature and humidity, the current capacitance value becomes 1010. With a preset time interval of 5 seconds and a preset step size of 1, the system will increase the capacitance reference value by 1 every 5 seconds. After the first update, the reference value becomes 1001; after the second update, it becomes 1002, and so on. After multiple updates, the capacitance reference value gradually approaches 1010 until the two values ​​are equal, at which point the update stops. This gradual adjustment method effectively filters out interference from capacitance value fluctuations caused by external factors. Through this step, a smooth and orderly update of the capacitance reference value is achieved. By constraining both time and amplitude, frequent jumps in the reference value caused by sampling noise or instantaneous interference are avoided, ensuring a stable adjustment process, preventing sudden changes in the reference value, and guaranteeing the stability and reliability of the anti-pinch judgment.

[0074] In one embodiment, such as Figure 9 As shown, the method further includes steps S160-S180.

[0075] S160. Continue to obtain the equivalent capacitance value of the linkage mechanism according to the preset time period to obtain the current capacitance value; S170. Based on the current capacitance value and the capacitance reference value, determine whether the preset anti-pinch protection end trigger condition is met by using a preset anti-pinch protection end detection strategy. S180. If the preset anti-pinch protection end trigger condition is met, an anti-pinch protection end command is generated and the electric push rod is controlled to resume operation according to the anti-pinch protection end command.

[0076] In this embodiment, the preset anti-pinch protection end detection strategy refers to a pre-set judgment logic used to analyze the relationship between the current capacitance value and the capacitance reference value to determine whether the anti-pinch protection can be terminated. The preset anti-pinch protection end trigger condition refers to the capacitance change judgment criterion for determining whether the anti-pinch protection action needs to be terminated. The anti-pinch protection end command refers to the control signal generated when it is determined that the anti-pinch protection can be terminated, used to restore the normal operation of the sofa.

[0077] Specifically, after the anti-pinch protection is triggered and the electric push rod stops running, the capacitance detection board resumes its data acquisition according to a preset time cycle, continuously acquiring the equivalent capacitance value of the linkage mechanism as the current capacitance value. Next, the stored capacitance reference value is retrieved, and the current capacitance value and the capacitance reference value are analyzed and calculated according to the preset anti-pinch protection end detection strategy to determine whether the relationship between the two meets the preset anti-pinch protection end trigger condition. If the condition is met, an anti-pinch protection end command is immediately generated and transmitted to the control component. Upon receiving the command, the control component drives the electric push rod to resume operation, allowing the sofa to continue its posture adjustment. If the preset anti-pinch protection end trigger condition is not met, the process returns to continue acquiring the current capacitance value. Specifically, when a person or foreign object is clamped, the capacitance value of the linkage mechanism will significantly deviate from the reference value due to the increased contact area. Once the person or object is removed, the capacitance value will gradually return to normal as the structure returns to its original state. If the system resumes operation immediately after the anti-pinch protection is triggered, secondary pinching injuries may occur because the person or object may not be completely removed. By continuously monitoring the proximity of the capacitance value to the reference value, the system can accurately identify whether the person or object has been completely removed, thus avoiding safety hazards caused by premature resumption of movement. Through this step, automatic monitoring and deactivation of the anti-pinch protection state are achieved, restoring the sofa's normal function without manual intervention. This intelligent deactivation of the anti-pinch protection ensures safety while improving the smoothness and automation of the user experience, enhancing user convenience and comfort.

[0078] In one embodiment, such as Figure 10 As shown, step S170 includes: S171-S172.

[0079] S171. Determine the capacitance difference based on the current capacitance value and the capacitance reference value, and determine whether the capacitance difference is less than a preset capacitance difference threshold. S172. If the capacitance difference is less than the preset capacitance difference threshold, it is determined that the preset anti-pinch protection termination trigger condition is met.

[0080] In this embodiment, the capacitance difference refers to the numerical difference between the current capacitance value and the capacitance reference value, and the preset capacitance difference threshold refers to a pre-set capacitance difference standard used to determine whether the anti-pinch protection can be terminated. Specifically, firstly, the latest collected current capacitance value and the corresponding capacitance reference value under the anti-pinch protection state are extracted from the storage unit. Secondly, the difference between the current capacitance value and the capacitance reference value is calculated by arithmetic subtraction to obtain the capacitance difference. Then, the calculated capacitance difference is compared with the preset capacitance difference threshold to determine whether the capacitance difference is less than the threshold. If the capacitance difference is less than the preset capacitance difference threshold, it is determined that the preset anti-pinch protection termination trigger condition is met. Specifically, the existing anti-pinch protection termination determination lacks a clear and unified standard, which can easily lead to premature resumption of operation resulting in the risk of secondary pinching injury, or delayed resumption affecting usability. This step establishes a clear anti-pinch protection termination determination rule by calculating the capacitance difference and comparing it with the preset threshold, solving the technical problem of the lack of a basis for anti-pinch protection termination determination. This step enables precise determination of when the anti-pinch protection ends, allowing the sofa to resume normal operation in a timely manner while effectively avoiding safety hazards caused by resuming operation before the risk has been eliminated. The system achieves precise control over the release of the anti-pinch protection, ensuring that the timing of the action recovery is both safe and timely, effectively balancing safety and functionality.

[0081] In one embodiment, the method further includes the following steps: if the preset anti-pinch protection trigger condition is met, an alarm command is generated and the warning light assembly is controlled to flash in a preset color according to the alarm command; if the preset anti-pinch protection end trigger condition is met, an alarm end command is generated and the warning light assembly is controlled to return to its original light state before the alarm according to the alarm end command.

[0082] In this embodiment, the alarm command refers to the control signal generated when the preset anti-pinch protection trigger condition is met, which is used to start the alarm of the warning light component; the alarm end command refers to the control signal generated when the preset anti-pinch protection end trigger condition is met, which is used to terminate the alarm of the warning light component; the preset color refers to the pre-set color of the warning light used to issue a safety warning; and the original light state refers to the working state of the warning light component before the alarm is triggered.

[0083] Specifically, firstly, when the preset anti-pinch protection trigger condition is met according to the preset anti-pinch detection strategy, the control component simultaneously generates an alarm command. This alarm command is then transmitted to the driver module connected to the warning light component. Upon receiving the command, the driver module controls the warning light component to switch to a preset color and maintain a flashing state, thus issuing a safety warning to the user and reminding them to stay away from the danger zone. Next, during subsequent continuous detection, when the preset anti-pinch protection end trigger condition is met according to the preset anti-pinch protection end detection strategy, the control component immediately generates an alarm end command. This alarm end command is then transmitted to the driver module of the warning light component. Upon receiving the command, the driver module controls the warning light component to stop flashing and restore the original lighting state before the alarm was triggered, thereby completing the entire alarm and alarm deactivation process. In particular, existing functional sofas lack intuitive alarm prompts after triggering anti-pinch protection, making it impossible for users to be aware of the safety risks in a timely manner. Furthermore, the lighting state cannot be automatically restored after the risk is cleared. This step establishes a visual alarm and deactivation mechanism by controlling the warning light component to flash with a preset color when anti-pinch protection is triggered and controlling it to return to its original state after the risk is cleared, thus solving the technical problem of the lack of intuitive prompts for anti-pinch protection. This step enables a visual indication of the anti-pinch protection status, which can promptly remind users to avoid risks. At the same time, the lights automatically return to normal after the risk is eliminated, improving the safety and user experience of the functional sofa.

[0084] Figure 11 This is a schematic block diagram of an anti-pinch detection device 200 for a functional sofa provided in an embodiment of the present invention. Figure 11 As shown, corresponding to the above-described anti-pinch detection method for functional sofas, the present invention also provides an anti-pinch detection device 200 for functional sofas. This anti-pinch detection device 200 includes a unit for performing the above-described anti-pinch detection method for functional sofas, and the device can be configured in a computer device. Specifically, please refer to... Figure 11 The anti-pinch detection device 200 of the functional sofa includes: a reference acquisition unit 201, a real-time acquisition unit 202, a judgment unit 203, and a control unit 204.

[0085] The reference acquisition unit 201 is used to acquire the equivalent capacitance value of the linkage mechanism as a capacitance reference value if the functional sofa is detected to be powered on. The real-time acquisition unit 202 is used to obtain the current capacitance value by acquiring the equivalent capacitance value of the linkage mechanism according to a preset time period; Judgment unit 203 is used to determine whether the preset anti-pinch protection trigger condition is met based on the current capacitance value and the capacitance reference value through a preset anti-pinch detection strategy; The control unit 204 is used to generate an anti-pinch protection command and control the electric push rod to stop running according to the anti-pinch protection command if the preset anti-pinch protection trigger condition is met.

[0086] It should be noted that the anti-pinch detection device 200 for the functional sofa in this embodiment also includes units that correspond one-to-one with the anti-pinch detection method for the functional sofa described above. For the sake of brevity, these will not be described in detail here.

[0087] The anti-pinch detection device 200 of the aforementioned functional sofa can be implemented as a computer program, which can, for example... Figure 12 It runs on the computer device shown.

[0088] Please see Figure 12 , Figure 12 This is a computer device provided in the embodiments of this application. Figure 12 This is a schematic block diagram of a computer device. The computer device 500 can be a sofa or a device inside a sofa.

[0089] See Figure 12 The computer device 500 includes a processor 502, a memory, and a network interface 505 connected via a system bus 501. The memory may include a non-volatile storage medium 503 and internal memory 504.

[0090] The non-volatile storage medium 503 may store an operating system 5031 and a computer program 5032. The computer program 5032 includes program instructions that, when executed, cause the processor 502 to perform an anti-pinch detection method for a functional sofa.

[0091] The processor 502 provides computing and control capabilities to support the operation of the entire computer device 500.

[0092] The internal memory 504 provides an environment for the operation of the computer program 5032 in the non-volatile storage medium 503. When the computer program 5032 is executed by the processor 502, the processor 502 can execute a method for detecting the anti-pinch function of a functional sofa.

[0093] This network interface 505 is used for network communication with other devices. Those skilled in the art will understand that... Figure 12 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device 500 to which the present application is applied. The specific computer device 500 may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0094] The processor 502 is used to run a computer program 5032 stored in a memory to implement the steps of the above method.

[0095] It should be understood that in the embodiments of this application, the processor 502 may be a central processing unit (CPU), or it may be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0096] It will be understood by those skilled in the art that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program includes program instructions and can be stored in a storage medium, which is a computer-readable storage medium. The program instructions are executed by at least one processor in the computer system to implement the process steps of the embodiments of the above methods.

[0097] Therefore, the present invention also provides a storage medium. This storage medium can be a computer-readable storage medium. The storage medium stores a computer program, wherein the computer program includes program instructions. When executed by a processor, the program instructions cause the processor to perform the steps of the above-described method.

[0098] The storage medium can be any computer-readable storage medium capable of storing program code, such as a USB flash drive, portable hard drive, read-only memory (ROM), magnetic disk, or optical disk.

[0099] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0100] In the several embodiments provided by this invention, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For example, the division of each unit is merely a logical functional division, and there may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed.

[0101] The steps in the method of this invention can be adjusted, merged, or reduced in order according to actual needs. The units in the device of this invention can be merged, divided, or reduced according to actual needs. Furthermore, the functional units in the various embodiments of this invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0102] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device to execute all or part of the steps of the methods described in the various embodiments of the present invention.

[0103] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0104] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Since these modifications and variations fall within the scope of the claims and their equivalents, this invention also intends to include these modifications and variations.

[0105] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A pinch detection method for a functional sofa, characterized in that, The functional sofa comprises at least one linkage mechanism and an electric push rod for driving the linkage mechanism to move, and the method comprises: If it is detected that the functional sofa is powered on, an equivalent capacitance value of the linkage mechanism is obtained as a capacitance reference value; An equivalent capacitance value of the linkage mechanism is obtained as a current capacitance value according to a preset time period; Whether a preset anti-pinch protection triggering condition is met is determined according to the current capacitance value and the capacitance reference value through a preset anti-pinch detection strategy; If the preset anti-pinch protection triggering condition is met, an anti-pinch protection instruction is generated, and the electric push rod is controlled to stop running according to the anti-pinch protection instruction.

2. The method of claim 1, wherein, The step of determining whether the preset anti-pinch protection triggering condition is met according to the current capacitance value and the capacitance reference value through the preset anti-pinch detection strategy comprises: A capacitance difference value is determined according to the current capacitance value and the capacitance reference value, and whether the capacitance difference value is greater than or equal to a preset capacitance difference threshold value is determined; If the capacitance difference value is greater than or equal to the preset capacitance difference threshold value, it is determined that the preset anti-pinch protection triggering condition is met.

3. The method of claim 1, wherein, If the linkage mechanism comprises a left linkage mechanism and a right linkage mechanism, the step of determining whether the preset anti-pinch protection triggering condition is met according to the current capacitance value and the capacitance reference value through the preset anti-pinch detection strategy comprises: A left capacitance difference value is determined according to the current capacitance value and the capacitance reference value corresponding to the left linkage mechanism, and whether the left capacitance difference value is greater than or equal to a preset left capacitance difference threshold value is determined; A right capacitance difference value is determined according to the current capacitance value and the capacitance reference value corresponding to the right linkage mechanism, and whether the right capacitance difference value is greater than or equal to a preset right capacitance difference threshold value is determined; If the left capacitance difference value is greater than or equal to the preset left capacitance difference threshold value and / or the right capacitance difference value is greater than or equal to the preset right capacitance difference threshold value, it is determined that the preset anti-pinch protection triggering condition is met.

4. The method of claim 1, wherein, The method further comprises: If the preset anti-pinch protection triggering condition is not met, a preset step-by-step approximation method is used to update the capacitance reference value so that the capacitance reference value approaches the current capacitance value; The step of obtaining the current capacitance value according to the preset time period is returned to be executed.

5. The method of claim 4, wherein, The step of updating the capacitance reference value so that the capacitance reference value approaches the current capacitance value by using the preset step-by-step approximation method comprises: The capacitance reference value is updated step by step according to a preset time interval and a preset step length towards the current capacitance value; Whether the capacitance reference value is equal to the current capacitance value is determined; If the capacitance reference value is equal to the current capacitance value, the updating of the capacitance reference value is stopped.

6. The method of claim 1, wherein, After the step of generating the anti-pinch protection instruction and controlling the electric push rod to stop running according to the anti-pinch protection instruction if the preset anti-pinch protection triggering condition is met, the method further comprises: The equivalent capacitance value of the linkage mechanism is continuously obtained as a current capacitance value according to a preset time period; Whether a preset anti-pinch protection ending triggering condition is met is determined according to the current capacitance value and the capacitance reference value through a preset anti-pinch protection ending detection strategy; If the preset anti-pinch protection end trigger condition is met, an anti-pinch protection end instruction is generated, and the electric push rod is controlled to resume operation according to the anti-pinch protection end instruction.

7. The method of claim 6, wherein, The step of determining whether the preset anti-pinch protection end trigger condition is met according to the current capacitance value and the capacitance reference value through a preset anti-pinch protection end detection strategy comprises: determining a capacitance difference value according to the current capacitance value and the capacitance reference value, and determining whether the capacitance difference value is less than a preset capacitance difference threshold value; if the capacitance difference value is less than the preset capacitance difference threshold value, it is determined that the preset anti-pinch protection end trigger condition is met.

8. The method of claim 6, wherein, The functional sofa further comprises a warning light assembly, and the method further comprises: if the preset anti-pinch protection trigger condition is met, an alarm instruction is generated, and the warning light assembly is controlled to flash in a preset color according to the alarm instruction; if the preset anti-pinch protection end trigger condition is met, an alarm end instruction is generated, and the warning light assembly is controlled to return to the original light state before the alarm according to the alarm end instruction.

9. The method according to any one of claims 1 to 8, characterized in that, The step of determining whether the preset anti-pinch protection trigger condition is met according to the current capacitance value and the capacitance reference value through a preset anti-pinch detection strategy comprises: determining a capacitance ratio value according to the current capacitance value and the capacitance reference value, and determining whether the capacitance ratio value is greater than or equal to a preset capacitance ratio value threshold value; if the capacitance ratio value is greater than or equal to the preset capacitance ratio value threshold value, it is determined that the preset anti-pinch protection trigger condition is met; or determining a capacitance change rate according to the current capacitance value and the capacitance reference value, and determining whether the capacitance change rate is greater than or equal to a preset capacitance change rate threshold value; if the capacitance change rate is greater than or equal to the preset capacitance change rate threshold value, it is determined that the preset anti-pinch protection trigger condition is met; or establishing a capacitance value change characteristic curve according to the capacitance reference value, the corresponding acquisition time node, and a plurality of current capacitance values and corresponding acquisition time nodes; inputting the capacitance value change characteristic curve into a pre-trained anti-pinch protection trigger model for identification to output an identification result; if the identification result is to trigger anti-pinch protection, it is determined that the preset anti-pinch protection trigger condition is met; or establishing a capacitance value change characteristic curve according to the capacitance reference value, the corresponding acquisition time node, and a plurality of current capacitance values and corresponding acquisition time nodes; inputting the capacitance value change characteristic curve into a pre-trained anti-pinch protection trigger model for identification to output an identification result; if the identification result is to trigger anti-pinch protection, it is determined that the preset anti-pinch protection trigger condition is met.

10. A functional sofa, characterized in that, The anti-pinch detection method is applied to the functional sofa of any one of claims 1-9, and the functional sofa comprises at least one connecting rod mechanism, an electric push rod, a capacitance detection plate, and a control assembly, wherein the control assembly is connected with the electric push rod and the capacitance detection plate respectively; the electric push rod is connected with the connecting rod mechanism and is used to drive the connecting rod mechanism to move; and the capacitance detection plate is electrically connected with the connecting rod mechanism and is used to detect an equivalent capacitance value of the connecting rod mechanism.

11. The method of claim 10, wherein, The connecting rod mechanism comprises a left connecting rod mechanism and a right connecting rod mechanism, and the capacitance detection plate is electrically connected with the left connecting rod mechanism and the right connecting rod mechanism respectively, and the capacitance detection plate is used for detecting the equivalent capacitance values of the left connecting rod mechanism and the right connecting rod mechanism.

12. The method of claim 10, wherein, The connecting rod mechanism comprises a first metal connecting rod, a second metal connecting rod and a conductive rivet, the end of the first metal connecting rod is riveted with the end of the second metal connecting rod through the conductive rivet, and the end of the first metal connecting rod and the end of the second metal connecting rod are electrically connected with the capacitance detection plate through the lead wire led out through the conductive rivet.

13. The method of claim 12, wherein, The outer sides of the first metal connecting rod and the second metal connecting rod are provided with an insulating layer.

14. The method of claim 12, wherein, The connecting rod mechanism further comprises a conductive gasket, which is sleeved outside the conductive rivet and located between the end of the first metal connecting rod and the end of the second metal connecting rod.

15. The method of claim 14, wherein, The functional sofa further comprises a sofa cushion, and the capacitance detection plate is fixedly arranged at the bottom of the sofa cushion, and the lead wire is routed along the first metal connecting rod and / or the second metal connecting rod and connected with the capacitance detection plate.

16. The method of claim 10, wherein, The functional sofa further comprises a warning light assembly connected with the control assembly.

17. A pinch detection device for a functional sofa, characterized in that The device comprises units for executing the method of any one of claims 1-9. 18.A computer device, comprising a memory and a processor, wherein a computer program is stored on the memory, and the processor implements the method of any one of claims 1-9 when executing the computer program.

19. A computer-readable storage medium, characterized in that, The storage medium stores a computer program, and the computer program can implement the method of any one of claims 1-9 when executed by a processor. The storage medium stores a computer program, and the computer program can implement the method of any one of claims 1-9 when executed by a processor.

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