Magneto-rheological damping seat control method and system, vehicle-mounted terminal and storage medium

Abstract

The invention discloses a magneto-rheological vibration reduction seat control method and system, a vehicle-mounted terminal and a storage medium, and the method comprises the steps that the current vehicle running speed is obtained to determine the normal heart rate of a passenger; the actual heart rate of the passenger is obtained, and the difference value between the actual heart rate and the normal heart rate is calculated; the bumping condition is judged based on the pitch angle speed, the roll angle speed, the Z-axis acceleration and the heart rate difference value of the vehicle; corresponding damping force is matched according to the bumping condition to establish a fuzzy rule base; in the established fuzzy rule base, the expected damping force is matched according to the heart rate difference value, the vehicle pitch angle speed, the roll angle speed and the Z-axis acceleration; a desired current is determined as a function of the desired damping force, and the magnetorheological damper is controlled with the desired current. The damping force of the magneto-rheological shock absorber is controlled in combination with the human physiological signal data and the vehicle state, accurate damping force control is conducted on the magneto-rheological shock absorption seat, the comfort and safety of the vehicle are improved, and the driving experience of a user is affected.

Description

Technical Field

[0001] This invention relates to the technical field of seats, and in particular to a magnetorheological vibration damping seat control method, system, vehicle terminal, and storage medium. Background Technology

[0002] Vehicle seats are the interface between people and vehicles, connecting the human body and the vehicle body. The quality of seat design directly affects passenger comfort and safety. Good seats provide excellent support for the human body, effectively alleviating driver fatigue and ensuring vehicle stability by supporting key structural points. Human-centered design and features in seats can mitigate and dampen impacts and vibrations from the road surface and environment, providing a comfortable and safe driving environment. Inappropriate seat design severely impacts riding comfort, safety, and ease of operation, leading to decreased worker efficiency and, with prolonged use, even various health problems. Therefore, a reasonable seat design concept must scientifically and rationally integrate people, vehicles, and the environment to better adapt to and meet various human needs. Currently, the mechanical suspension systems of vehicle seats on the market mainly use single spring suspensions, hydraulic damper suspensions, or air suspensions. The damping force of these systems is usually fixed during manufacturing and cannot be adjusted according to different driving conditions, failing to provide optimal comfort. Therefore, developing a seat back vibration damping technology that can adapt to a wider range of vibration frequencies is particularly important. To address these issues, magnetorheological dampers were developed, which can be used as magnetorheological vibration dampers. Magnetorheological dampers have a wide range of adjustable damping forces, allowing for flexible adjustments based on different operating conditions and vibration frequencies to achieve optimal vibration reduction. However, traditional magnetorheological vibration-damped seats do not incorporate human physiological signal data to control the damping force of the magnetorheological damper, affecting vehicle comfort and safety, as well as the user's driving experience. Summary of the Invention

[0003] The purpose of this invention is to provide a magnetorheological damping seat control method, system, vehicle terminal and storage medium to solve the technical problem that magnetorheological damping seats in the prior art cannot combine human physiological signals to control damping force.

[0004] In a first aspect, the present invention discloses a magnetorheological damping seat control method, the method comprising the following steps: acquiring the current vehicle speed to determine the passenger's normal heart rate at the current speed; acquiring the passenger's actual heart rate at the current speed and calculating the difference between the passenger's actual heart rate and normal heart rate; judging the bump condition based on the vehicle's pitch angular velocity, roll angular velocity, Z-axis acceleration, and heart rate difference; establishing a fuzzy rule base by matching the corresponding damping force according to the bump condition; matching the desired damping force of the magnetorheological damping seat in the established fuzzy rule base according to the heart rate difference and the vehicle's pitch angular velocity, roll angular velocity, and Z-axis acceleration; determining the desired current based on the desired damping force of the magnetorheological damping seat, and using the desired current to control the magnetorheological damper.

[0005] In one embodiment of this application, the desired damping force of the magnetorheological damping seat is matched based on the heart rate difference and the vehicle pitch angular velocity, roll angular velocity, and Z-axis acceleration in the established fuzzy rule base. The method further includes: matching the backrest damping force of the desired magnetorheological damping seat based on the heart rate difference and the vehicle pitch angular velocity; determining a desired backrest current based on the desired backrest damping force, and using the desired backrest current to control the backrest magnetorheological damper; matching the seat cushion damping force of the desired magnetorheological damping seat based on the heart rate difference and the roll angular velocity and Z-axis acceleration; determining a desired seat cushion current based on the desired seat cushion damping force, and using the desired seat cushion current to control the seat cushion magnetorheological damper.

[0006] Secondly, this application provides a magnetorheological vibration damping seat control system, including a seat body, a controller, sensors, a human heart rate acquisition device, a backrest magnetorheological vibration damper, and a seat cushion magnetorheological vibration damper. The backrest magnetorheological vibration damper and the seat cushion magnetorheological vibration damper are respectively installed on the backrest and base of the seat body. The input terminals of the backrest magnetorheological vibration damper and the seat cushion magnetorheological vibration damper are respectively connected to the output terminal of the controller, and are used to receive control commands or current output values ​​from the backrest magnetorheological vibration damper and the seat cushion magnetorheological vibration damper, respectively. The sensors are used to acquire data, and the output terminals of the sensors are connected to the input terminals of the controller. The human heart rate acquisition device is used to collect data. The system collects the passenger's heart rate, and the output of the human heart rate acquisition device is connected to the input of the controller. The controller includes an MCU, a data processing module, a backrest control module, and a seat cushion control module. The data processing module, backrest control module, and seat cushion control module are all located on the MCU. The input of the data processing module is connected to the output of the sensor and the output of the human heart rate acquisition device, respectively. The output of the data processing module is connected to the input of the backrest control module and the input of the seat cushion control module, respectively. The outputs of the backrest control module and the seat cushion control module are connected to the inputs of the backrest magnetorheological damper and the seat cushion magnetorheological damper, respectively.

[0007] Thirdly, this application also provides an in-vehicle terminal, comprising: a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the magnetorheological vibration damping seat control method described in any one of the above.

[0008] Fourthly, this application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the magnetorheological vibration damping seat control method described in any one of the above claims.

[0009] As described above, this application provides a magnetorheological damping seat control method, system, vehicle terminal, and storage medium, which has the following beneficial effects: by combining human physiological signal data and vehicle status to control the damping force of the magnetorheological damper, the damping force of the magnetorheological damping seat can be precisely controlled, thereby improving the comfort and safety of the vehicle and influencing the user's driving experience.

[0010] The invention will become clearer from the following description, taken in conjunction with the accompanying drawings, which are used to explain embodiments of the invention. Attached Figure Description

[0011] Figure 1 The diagram shown is an exemplary embodiment of the magnetorheological vibration damping seat control method of this application.

[0012] Figure 2 The following is another flowchart illustrating a magnetorheological vibration damping seat control method, as shown in an exemplary embodiment of this application.

[0013] Figure 3 The diagram shown is a flowchart illustrating a magnetorheological vibration damping seat control system, as presented in an exemplary embodiment of this application.

[0014] Figure 4 The diagram shown is an internal schematic of the controller of a magnetorheological vibration damping seat control system, as illustrated in an exemplary embodiment of this application.

[0015] Figure 5 The diagram shown is a structural schematic of an in-vehicle terminal provided in an embodiment of this application. Detailed Implementation

[0016] The embodiments of this application will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be understood that the preferred embodiments are only for illustrating this application and are not intended to limit the scope of protection of this application.

[0017] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. Therefore, the illustrations only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the shape, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0018] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present application. However, it will be apparent to those skilled in the art that embodiments of the present application may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present application.

[0019] refer to Figure 1 A magnetorheological vibration damping seat control method, the method comprising the following steps:

[0020] S100: Obtain the current vehicle speed to determine the passenger's normal heart rate at the current speed;

[0021] S110: Obtain the passenger's actual heart rate at the current speed and calculate the difference between the passenger's actual heart rate and normal heart rate;

[0022] S120: Determines bump conditions based on vehicle pitch rate, roll rate, Z-axis acceleration, and heart rate difference;

[0023] S130: Establish a fuzzy rule base by matching the corresponding damping force according to the bump conditions;

[0024] S140: In the established fuzzy rule base, the desired damping force of the magnetorheological damping seat is matched according to the heart rate difference and the vehicle pitch angular velocity, roll angular velocity, and Z-axis acceleration.

[0025] S150: Determine the desired current based on the expected damping force of the magnetorheological damping seat, and use the desired current to control the magnetorheological damper.

[0026] The system acquires the current vehicle speed to determine the passenger's normal heart rate at that speed; it also acquires the passenger's actual heart rate at the current speed and calculates the difference between the actual and normal heart rates. The system then determines the bump condition based on the vehicle's pitch rate, roll rate, Z-axis acceleration, and the heart rate difference. Bump conditions are categorized as no bumps, minor bumps, and major bumps. If the difference between the passenger's normal and current actual heart rates is less than the minor bump threshold, the system is considered to be in a no-bump condition. If the difference is greater than or equal to the minor bump threshold but less than the major bump threshold, the system further determines whether the current condition is a minor bump condition based on whether the vehicle's actual pitch rate, roll rate, and Z-axis acceleration are less than or equal to the minor bump threshold. Similarly, if the difference is greater than the major bump threshold, the system further determines whether the current condition is a major bump condition based on whether the vehicle's actual pitch rate, roll rate, and Z-axis acceleration are greater than the major bump threshold. A fuzzy control system based on passenger physiological and vehicle status information is established by considering the difference between the passenger's normal heart rate and the current heart rate, as well as whether the current vehicle pitch rate, roll rate, and Z-axis acceleration exceed three set thresholds. Based on the established fuzzy control system, the current operating condition level can be determined according to whether the above four signals exceed the set thresholds, and the control force output can be adjusted in real time by matching the fuzzy rule base according to the level, thereby adjusting the adaptive adjustment current.

[0027] like Figure 2 As shown, in an exemplary embodiment, the seat vibration damping control method includes at least steps S141, S142, S151, and S152, which are described in detail below:

[0028] The established fuzzy rule base includes matching the desired damping force of the magnetorheological damping seat based on the heart rate difference and the vehicle's pitch angular velocity, roll angular velocity, and Z-axis acceleration.

[0029] S141: Match the desired backrest damping force of the magnetorheological damping seat based on the heart rate difference and the vehicle pitch angular velocity.

[0030] S151: Determine the desired backrest current based on the desired backrest damping force, and use the desired backrest current to control the backrest magnetorheological damper.

[0031] S 142: Match the desired seat cushion damping force of the magnetorheological damping seat based on heart rate difference, roll rate, and Z-axis acceleration;

[0032] S 152: Determine the desired seat current based on the desired seat damping force, and use the desired seat current to control the seat magnetorheological damper.

[0033] The output damping force of the backrest magnetorheological damper is controlled by the pitch angular velocity, while the output damping force of the seat cushion magnetorheological damper is controlled by the tilt angular velocity and Z-axis acceleration. The damping force of both the backrest and seat cushion magnetorheological dampers is controlled by matching the difference between the passenger's normal and actual heart rates at the current vehicle speed, the pitch angular velocity, the tilt angular velocity, and the Z-axis acceleration from a fuzzy rule base. Taking minor bumps as an example, when the difference between the passenger's normal heart rate and actual heart rate triggers a minor bump threshold, the pitch angular velocity is then checked to see if it triggers the minor bump threshold. If it does, the damping force rule in the fuzzy rule library is matched to control the damping force of the backrest magnetorheological damper. If the roll angular velocity and Z-axis acceleration also trigger minor bump conditions, the damping force rule in the fuzzy rule library is matched to control the damping force of the seat cushion magnetorheological damper. This scheme allows for regional control of the damping force of the backrest and seat cushion magnetorheological dampers, ensuring passenger comfort. In this embodiment, the damping force of the magnetorheological damper is controlled by combining human physiological signal data and vehicle status, enabling precise damping force control of the magnetorheological damping seat, improving vehicle comfort and safety, and enhancing the user's driving experience.

[0034] Reference Figure 3 and Figure 4 , Figure 3 The diagram shown is a flowchart illustrating a magnetorheological vibration damping seat control system, as presented in an exemplary embodiment of this application. Figure 4The diagram shows the internal structure of a magnetorheological vibration damping seat control system. It includes a seat body 200, a controller 230, a sensor 210, a human heart rate acquisition device 220, a backrest magnetorheological vibration damper 240, and a seat cushion magnetorheological vibration damper 250. The backrest magnetorheological vibration damper 240 and the seat cushion magnetorheological vibration damper 250 are respectively mounted on the backrest and base of the seat body 200. The input terminals of the backrest magnetorheological vibration damper 240 and the seat cushion magnetorheological vibration damper 250 are connected to the output terminals of the controller 230, respectively, for receiving control commands or current output values ​​from the backrest magnetorheological vibration damper 240 and the seat cushion magnetorheological vibration damper 250. The sensor 210 is used to acquire data, and its output terminal is connected to the input terminal of the controller 230. The human heart rate acquisition device 220 is used to collect passenger heart rate data. The heart rate of the passenger is measured, and the output of the human heart rate acquisition device 220 is connected to the input of the controller 230. The controller 230 includes an MCU, a data processing module 231, a backrest control module 232, and a seat cushion control module 233. The data processing module 231, the backrest control module 232, and the seat cushion control module 233 are all located on the MCU. The input of the data processing module 231 is connected to the output of the sensor 210 and the output of the human heart rate acquisition device 220, respectively. The output of the data processing module 231 is connected to the input of the backrest control module 232 and the input of the seat cushion control module 233, respectively. The outputs of the backrest control module 232 and the seat cushion control module 233 are connected to the inputs of the backrest magnetorheological damper 240 and the seat cushion magnetorheological damper 250, respectively.

[0035] During driving, the vehicle suspension is subjected to road surface excitation. Sensor 150 records and processes the data, converts it into an electrical signal, and transmits it to controller 230. Based on the current vehicle speed, it determines the passenger's normal heart rate at that speed. Human heart rate sensor 220, which can be a wristband, ring, or heart rate chest strap, collects the passenger's actual heart rate, calculates the difference between the actual and normal heart rate, and sends it to data processing module 231. The data collected by sensor 150 and human heart rate sensor 220 can be transmitted to controller 230 via wired or wireless means. After receiving the data and heart rate difference from sensor 150, data processing module 231 within controller 230 processes and analyzes this data to determine the vehicle's pitch rate, roll rate, Z-axis acceleration, etc. Backrest control module 232 and seat cushion control module 233 use the collected data and pre-set PID control... The algorithm calculates the control commands or current output values ​​for the backrest magnetorheological damper 220 and the seat cushion magnetorheological damper 130. The adjustment commands generated by the controller 230 are transmitted through the circuit to the magnetorheological coils in the backrest magnetorheological damper 220 and the seat cushion magnetorheological damper 130, respectively controlling the flow of the magnetorheological fluid in the backrest magnetorheological damper 220 and the seat cushion magnetorheological damper 130, thereby adjusting the damping force of the backrest magnetorheological damper 220 and the seat cushion magnetorheological damper 130. Its fast response speed and real-time adjustment of damping force improve seat comfort and reduce bumps and vibrations during vehicle operation, providing passengers with a more comfortable riding experience. By controlling the backrest magnetorheological damper 220 and the seat cushion magnetorheological damper 130, it reduces fatigue caused by long-term driving or riding, improves the comfort of the driver and passengers, and can also help maintain the stability of the driver and passengers' posture, reduce body swaying on bumpy roads, thereby improving riding safety.

[0036] Please see Figure 5 , Figure 5 This is a schematic diagram of the structure of an in-vehicle terminal provided in one embodiment of this application. Figure 5 A schematic diagram of a computer system suitable for implementing the vehicle-mounted terminal of this application is shown. It should be noted that... Figure 5 The computer system 300 of the vehicle terminal shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.

[0037] An in-vehicle terminal includes: one or more processors; and a storage device for storing one or more programs, which, when executed by the one or more processors, cause the in-vehicle terminal to perform the steps of the magnetorheological vibration damping seat control method as described in any of the preceding claims.

[0038] like Figure 5As shown, the computer system 300 includes a Central Processing Unit (CPU) 301, which can perform various appropriate actions and processes, such as executing the methods described in the above embodiments, based on programs stored in Read-Only Memory (ROM) 302 or programs loaded from storage portion 308 into Random Access Memory (RAM) 303. The RAM 303 also stores various programs and data required for system operation. The CPU 301, ROM 302, and RAM 303 are interconnected via a bus 304. An Input / Output (I / O) interface 305 is also connected to the bus 304.

[0039] The following components are connected to I / O interface 305: an input section 306 including a keyboard, mouse, etc.; an output section 307 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.; a storage section 308 including a hard disk, etc.; and a communication section 309 including a network interface card such as a LAN (Local Area Network) card, modem, etc. The communication section 309 performs communication processing via a network such as the Internet. A drive 310 is also connected to I / O interface 305 as needed. Removable media 311, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., are installed on drive 310 as needed so that computer programs read from them can be installed into storage section 308 as needed.

[0040] Specifically, according to embodiments of this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program including a computer program for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication section 309, and / or installed from removable medium 311. When the computer program is executed by central processing unit (CPU) 301, it performs various functions defined in the system of this application.

[0041] This application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the steps of the magnetorheological vibration damping seat control method as described in any of the preceding claims. This computer-readable storage medium may be included in the vehicle-mounted terminal described in the above embodiments, or it may exist independently and not be installed in the vehicle-mounted terminal.

[0042] It should be noted that the computer-readable medium shown in the embodiments of this application can be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. A computer-readable storage medium can be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), flash memory, optical fiber, portable compact disc read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this application, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying a computer-readable computer program. Such propagated data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media can also be any computer-readable medium other than computer-readable storage media, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The computer program contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to wireless, wired, etc., or any suitable combination thereof.

[0043] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. Each block in a flowchart or block diagram may represent a module, segment, or portion of code, which contains one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram or flowchart, and combinations of blocks in a block diagram or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0044] The units described in the embodiments of this application can be implemented in software or hardware, and the described units can also be located in a processor. The names of these units do not necessarily limit the specific unit itself.

[0045] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this application should still be covered by the claims of this application.

Claims

1. A magnetorheological vibration damping seat control method, characterized in that, The method includes the following steps: Obtain the current vehicle speed to determine the passenger's normal heart rate at that speed; Obtain the passenger's actual heart rate at the current speed and calculate the difference between the passenger's actual heart rate and normal heart rate; The bump condition is determined based on the vehicle's pitch rate, roll rate, Z-axis acceleration, and heart rate difference. A fuzzy rule base is established by matching the appropriate damping force according to the bump conditions. In the established fuzzy rule base, the desired damping force of the magnetorheological damping seat is matched based on the heart rate difference and the vehicle's pitch angular velocity, roll angular velocity, and Z-axis acceleration. The desired current is determined based on the expected damping force of the magnetorheological damping seat, and the magnetorheological damper is controlled by the desired current.

2. The magnetorheological vibration damping seat control method as described in claim 1, characterized in that, The established fuzzy rule base includes matching the desired damping force of the magnetorheological damping seat based on the heart rate difference and the vehicle's pitch angular velocity, roll angular velocity, and Z-axis acceleration. The desired backrest damping force of the magnetorheological damping seat is matched based on the heart rate difference and the vehicle pitch angular velocity; the desired backrest current is determined based on the desired backrest damping force, and the desired backrest current is used to control the backrest magnetorheological damper. The desired seat cushion damping force of the magnetorheological damping seat is matched based on the heart rate difference, roll rate, and Z-axis acceleration; the desired seat cushion current is determined based on the desired seat cushion damping force, and the desired seat cushion current is used to control the seat cushion magnetorheological damper.

3. A magnetorheological vibration damping seat control system, characterized in that, include: The seat body, controller, sensor, human heart rate acquisition device, backrest magnetorheological damper, and seat cushion magnetorheological damper are respectively installed on the backrest and base of the seat body. The input terminals of the backrest magnetorheological damper and the seat magnetorheological damper are respectively connected to the output terminal of the controller, and are used to receive control commands or current output values ​​from the backrest magnetorheological damper and the seat magnetorheological damper, respectively. The sensor is used to acquire data, and the output of the sensor is connected to the input of the controller; The human heart rate collector is used to collect the passenger's heart rate, and the output of the human heart rate collector is connected to the input of the controller. The controller includes an MCU, a data processing module, a backrest control module, and a seat cushion control module. The data processing module, backrest control module, and seat cushion control module are all located on the MCU. The input terminal of the data processing module is connected to the output terminal of the sensor and the output terminal of the human heart rate acquisition device, respectively. The output terminal of the data processing module is connected to the input terminal of the backrest control module and the input terminal of the seat cushion control module, respectively. The output terminals of the backrest control module and the seat cushion control module are connected to the input terminals of the backrest magnetorheological vibration damper and the seat cushion magnetorheological vibration damper, respectively.

4. A vehicle-mounted terminal, characterized in that, include: One or more processors; A storage device for storing one or more programs, which, when executed by the one or more processors, cause the vehicle terminal to implement the steps of the magnetorheological vibration damping seat control method as described in any one of claims 1 to 2.

5. A computer-readable storage medium, characterized in that, It stores a computer program that, when executed by a processor, implements the steps of the magnetorheological vibration damping seat control method according to any one of claims 1 to 2.

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