A method, device, medium and product for determining the temperature of a whole overlock machine

Abstract

The application discloses a kind of overlock machine whole machine temperature determination method, equipment, medium and product.Introduce sewing machine thermal simulation technical field, this method includes: obtaining the spindle speed of overlock machine and target mapping relationship of target parameter, wherein the target parameter includes: heat production power, air volume and equivalent thermal conductivity;Based on the spindle speed of the overlock machine and target mapping relationship of target parameter, determine the target parameter corresponding to target spindle speed;Based on the target parameter corresponding to target spindle speed, determine the overlock machine whole machine temperature corresponding to target spindle speed, by the technical scheme of the application, the overlock machine whole machine temperature can be accurately and efficiently predicted.

Description

Technical Field

[0001] This invention relates to the field of sewing machine thermal simulation technology, and in particular to a method, equipment, medium, and product for determining the overall temperature of an overlock sewing machine. Background Technology

[0002] As a high-speed sewing machine, the temperature distribution of an overlock sewing machine directly affects sewing accuracy, component lifespan, and user experience. Therefore, determining the overall temperature of an overlock sewing machine has become a pressing technical problem that needs to be solved. Summary of the Invention

[0003] This invention provides a method, equipment, medium, and product for determining the overall temperature of an overlock sewing machine, which can accurately and efficiently predict the overall temperature of the overlock sewing machine.

[0004] According to one aspect of the present invention, a method for determining the overall temperature of an overlock sewing machine is provided, comprising: Obtain the target mapping relationship between the spindle speed of the overlock sewing machine and the target parameters, wherein the target parameters include: heat generation power, air volume and equivalent thermal conductivity; Based on the target mapping relationship between the spindle speed and target parameters of the overlock sewing machine, the target parameters corresponding to the target spindle speed are determined; Based on the target parameters corresponding to the target spindle speed, determine the overall temperature of the overlock sewing machine corresponding to the target spindle speed.

[0005] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising: At least one processor; and a memory communicatively connected to said at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor, which is then executed by the at least one processor to enable the at least one processor to perform the overlock sewing machine temperature determination method according to any embodiment of the present invention.

[0006] According to another aspect of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium storing computer instructions for causing a processor to execute and implement the method for determining the overall temperature of an overlock sewing machine according to any embodiment of the present invention.

[0007] According to another aspect of the present invention, a computer program product is provided, which, when executed by a processor, implements the method for determining the overall temperature of an overlock sewing machine as described in any of the embodiments of the present invention.

[0008] This invention provides a target mapping relationship between the spindle speed of an overlock sewing machine and target parameters, where the target parameters include: heat generation power, air volume, and equivalent thermal conductivity. Based on the target mapping relationship between the spindle speed and target parameters, the target parameters corresponding to the target spindle speed are determined. Based on the target parameters corresponding to the target spindle speed, the overall temperature of the overlock sewing machine corresponding to the target spindle speed is determined, enabling accurate and efficient prediction of the overall temperature of the overlock sewing machine.

[0009] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0010] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a flowchart of a method for determining the overall temperature of an overlock sewing machine according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of an electronic device according to an embodiment of the present invention. Detailed Implementation

[0012] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0013] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0014] It is understood that before using the technical solutions disclosed in the various embodiments of this disclosure, users should be informed of the types, scope of use, and usage scenarios of the personal information involved in this disclosure in an appropriate manner in accordance with relevant laws and regulations, and user authorization should be obtained.

[0015] Example 1 Figure 1 This is a flowchart illustrating a method for determining the overall temperature of an overlock sewing machine according to an embodiment of the present invention. This embodiment is applicable to situations involving determining the overall temperature of an overlock sewing machine. The method can be executed by the overlock sewing machine overall temperature determination device described in this embodiment. This device can be implemented using software and / or hardware, such as... Figure 1 As shown, the method specifically includes the following steps: S110, obtain the target mapping relationship between the spindle speed of the overlock sewing machine and the target parameters.

[0016] The target parameters include: heat generation power, air volume, and equivalent thermal conductivity.

[0017] Optionally, obtain the target mapping relationship between the spindle speed of the overlock sewing machine and the target parameters, including: Obtain the initial mapping relationship between the spindle speed and target parameters of the overlock sewing machine.

[0018] The initial mapping relationships between the main shaft speed and target parameters of the overlock sewing machine include: the initial mapping relationship between the main shaft speed and heat generation power, the initial mapping relationship between the main shaft speed and air volume, and the initial mapping relationship between the main shaft speed and equivalent thermal conductivity. The initial mapping relationship between the main shaft speed and heat generation power includes: the initial mapping relationship between the main shaft speed and the heat generation power of the second main motor, and the initial mapping relationship between the main shaft speed and the heat generation power of the second holding motor. The initial mapping relationship between the main shaft speed and internal equivalent thermal conductivity includes: the initial mapping relationship between the main shaft speed and equivalent thermal conductivity, and the initial mapping relationship between the main shaft speed and external equivalent thermal conductivity.

[0019] Determine the running time and stopping time corresponding to the break-in conditions.

[0020] In this embodiment, for the running-in condition, at a speed n, the operating cycle includes: running Seconds, stop Seconds, until the temperature stabilizes. That is, the running time is... seconds, stop time is Second.

[0021] Based on the initial mapping relationship between the spindle speed and target parameters of the overlock sewing machine, and the running time and stopping time corresponding to the running-in condition, the target mapping relationship between the spindle speed and target parameters of the overlock sewing machine is determined.

[0022] In this embodiment, the target mapping relationship between the spindle speed and target parameters of the overlock sewing machine can be determined based on the initial mapping relationship between the spindle speed and target parameters, the running time and stop time corresponding to the running-in condition, as well as the first formula. Specifically, the target mapping relationship between the spindle speed and heat generation power is determined based on the initial mapping relationship between the spindle speed and heat generation power, the running time and stop time corresponding to the running-in condition, and the first formula, whereby: ; in, The function corresponding to the target mapping relationship between spindle speed and heat generation power, where n is the spindle speed. For heat generation power, This refers to the running time corresponding to the break-in condition. The stopping time corresponding to the running-in condition. The function corresponding to the initial mapping relationship between the spindle speed and the heat generation power of the second main motor. It is a function corresponding to the initial mapping relationship between the spindle speed and the heat generation power of the second holding motor, with the spindle speed being zero.

[0023] Based on the initial mapping relationship between spindle speed and equivalent thermal conductivity, the running time and stopping time corresponding to the running-in condition, and the second formula, the target mapping relationship between spindle speed and equivalent thermal conductivity is determined. The second formula is: ; ; in, The function corresponding to the target mapping relationship between the main spindle speed and the internal equivalent thermal conductivity, where n is the main spindle speed. For internal equivalent thermal conductivity, The function corresponding to the target mapping relationship between spindle speed and external equivalent thermal conductivity. External equivalent thermal conductivity The initial mapping relationship between spindle speed and internal equivalent thermal conductivity. The initial mapping relationship between spindle speed and external equivalent thermal conductivity. The thermal conductivity of air.

[0024] Based on the initial mapping relationship between the spindle speed and air volume of the overlock sewing machine, the running time, stop time, and the third formula corresponding to the break-in condition, the target mapping relationship between the spindle speed and air volume of the overlock sewing machine is determined. The third formula is as follows: , This is the function corresponding to the initial mapping relationship between the spindle speed and air volume of the overlock sewing machine. This is the function corresponding to the target mapping relationship between the spindle speed and air volume of the overlock sewing machine.

[0025] Optionally, the initial mapping relationship between the spindle speed and heat generation power of the overlock sewing machine is obtained, including: The spindle speed, friction coefficient of each moving pair, motor efficiency coefficient, main electric drive component efficiency coefficient, and holding electric drive component efficiency coefficient of the overlock sewing machine are obtained.

[0026] In this embodiment, the spindle speed of the overlock sewing machine can be a preset spindle speed of the overlock sewing machine, for example, multiple preset spindle speeds of overlock sewing machines.

[0027] In this embodiment, the friction coefficients of each kinematic pair can be obtained by controlling the overlock sewing machine to run at a test speed, measuring the main motor torque, the normal force of each kinematic pair, and the relative sliding speed of each kinematic pair during operation, and calibrating the friction coefficients of each kinematic pair based on the main motor torque, the test speed, the normal force of each kinematic pair, and the relative sliding speed of each kinematic pair. For example, when the main motor is running under no-load, with zero load, the following formula applies according to the law of conservation of energy: ; in, This represents the measured torque of the main motor. To test the rotational speed, Let i be the coefficient of friction of the kinematic pair. For kinematic pairs, normal force, Let be the relative sliding velocity of kinematic pair i.

[0028] The friction coefficients of each kinematic pair are calibrated based on the above formula.

[0029] It should be noted that the initial value for rolling friction is 0.0025, and the initial value for sliding friction is also 0.025.

[0030] In this embodiment, the motor efficiency coefficient and the main electric drive component efficiency coefficient can be calibrated using the following formula: .

[0031] It should be noted that during the running-in process, the input power of the main spindle during operation is as follows: ; Right now: ; in, This is the input power when the main spindle of the machine is rotating. For the frictional heat generation power of the moving pair i, For the heat generation power of the first main motor, For the heat generation power of the second main motor, The motor's energy efficiency coefficient. The energy efficiency coefficient of the main electric drive component.

[0032] It should be noted that, The initial value is 0.8. The initial value is 0.96.

[0033] Input power when the main spindle stops: ; Right now: ; in, To maintain the energy efficiency coefficient of electric drive components, To ensure the input power of the entire machine when the spindle stops running, To maintain the heat generation power of the motor, To maintain the heat generation power of the motor, R is the line current of the motor under the holding torque T, and R is the phase resistance of the motor.

[0034] The energy efficiency coefficient of the electric drive components can be calibrated based on the above formula. It should be noted that... The initial value is 0.95.

[0035] During calibration, multiple sets of data mapping relationships are obtained by appropriately adjusting the rotation speed, and then the parameters are calibrated using the least squares method.

[0036] It should be noted that the friction coefficient and energy efficiency coefficient may theoretically fluctuate at different speeds. Therefore, when conducting testing and calibration on the prototype, it is necessary to clarify the applicable range of the spindle speed for the calibration parameters. Data such as the main motor torque, input power during operation, and input power at rest are obtained by adjusting the spindle speed. Data within a certain speed range are selected, and calibration is performed using the least squares method based on the calibration model. , , and If the error between the theoretical value and the test value is ≤5%, the parameter calibration within that speed range is considered successful. If the error exceeds 5%, the speed range is narrowed and calibration continues until the error requirement is met.

[0037] By inputting the spindle speed of the overlock sewing machine into the mechanical multibody dynamics model, the holding torque, normal force of each kinematic pair, and relative sliding speed are obtained.

[0038] In this embodiment, the mechanical multibody dynamics model can be obtained by converting the geometric model (shape, size) and physical model (mass, inertia, material properties) into a simulation model. The transmission components are connected by kinematic pairs and the degrees of freedom are constrained. The main shaft is modeled as a flexible body and coupled with other rigid bodies for solution. The loads of the bearings at different positions of the main shaft can be extracted, taking into account both calculation accuracy and efficiency.

[0039] The frictional heat generation power of each kinematic pair is determined based on the normal force, friction coefficient, and relative sliding speed of each kinematic pair.

[0040] In this embodiment, based on the formula Determine the frictional heat generation power of each kinematic pair. Among them, For the movement of the secondary i Frictional heat generation power (W). For the movement of the secondary i Friction (N) For the movement of the secondary i Relative sliding speed (m / s), For the movement of the secondary i The coefficient of friction is related to the type of friction, lubrication conditions, and assembly precision. The normal force (N) of the kinematic pair is given by the subscript. Indicates the sequence number of the kinematic pair.

[0041] The main motor shaft power is determined based on the sum of the frictional heat generated by each kinematic pair.

[0042] In this embodiment, the sum of the frictional heat generation power of each kinematic pair is the main motor shaft power.

[0043] The heat generation power of the first main motor is determined based on the main motor shaft power and the motor energy efficiency coefficient.

[0044] In this embodiment, based on the principle of energy conservation, the formula for calculating the heat power generated by the main motor is as follows: ; in, The heat output power (W) of the main motor. The motor's energy efficiency coefficient. This refers to the power of the main motor shaft.

[0045] Based on the heat output power of the first main motor, the energy efficiency coefficient of the main electric drive components, and the shaft power of the main motor, the heat output power of the second main motor corresponding to the main shaft speed of the overlock sewing machine is determined.

[0046] In this embodiment, based on the principle of energy conservation, the formula for calculating the heat generation power of the second main motor is as follows: ; in, The heat output power (W) of the second main motor. The energy efficiency coefficient of the main electric drive component.

[0047] The heat generation power of the first holding motor is determined based on the line current and phase resistance of the motor under holding torque.

[0048] In this embodiment, for the holding shaft, the heat generation power during motor cessation is calculated as follows: since there is no relative motion between the kinematic pairs, frictional heat generation is zero, and all motor input power is converted into motor heat generation. This heat generation power can be calculated by looking up a table using the static torque-current characteristic. ;in, To maintain the heat generation power of the motor, R is the line current of the motor under the holding torque T, and R is the phase resistance of the motor.

[0049] The heat output of the second holding motor corresponding to the spindle speed of the overlock sewing machine is determined based on the heat output power of the first holding motor and the energy efficiency coefficient of the holding electric drive component.

[0050] In this embodiment, the formula for calculating the heat generation power of the second holding motor is: ; in, To maintain the second motor's heat generation power (W). Maintain the energy efficiency coefficient of electric drive components.

[0051] The initial mapping relationship between the spindle speed and heat generation power of the overlock sewing machine is determined based on the spindle speed, the heat generation power of the second main motor corresponding to the spindle speed, and the heat generation power of the second holding motor corresponding to the spindle speed.

[0052] In this embodiment, the initial mapping relationship between the spindle speed and the heat generation power of the second main motor of the overlock sewing machine is determined based on the spindle speed and the corresponding heat generation power of the second holding motor.

[0053] Optionally, obtain the initial mapping relationship between the spindle speed and air volume of the overlock sewing machine, including: The spindle speed of the overlock sewing machine is input into the wind tunnel simulation model of the handwheel fan to obtain the air volume corresponding to the spindle speed of the overlock sewing machine.

[0054] The initial mapping relationship between the spindle speed and air volume of the overlock sewing machine is determined based on the spindle speed and the corresponding air volume.

[0055] In this embodiment, a wind tunnel simulation model of a handwheel fan is established to simulate the airflow effect of the handwheel fan at different speeds, and the airflow-speed mapping relationship is obtained by calculation. ,in, This refers to the airflow volume of the handwheel fan.

[0056] Optionally, the initial mapping relationship between the spindle speed and the equivalent thermal conductivity of the overlock sewing machine includes the initial mapping relationship between the spindle speed and the internal equivalent thermal conductivity, and the initial mapping relationship between the spindle speed and the external equivalent thermal conductivity.

[0057] Obtain the initial mapping relationship between the spindle speed and equivalent thermal conductivity of the overlock sewing machine, including: The actual temperature of the overlock sewing machine during operation at the first spindle speed is obtained.

[0058] Query the initial mapping relationship between the spindle speed and heat generation power of the overlock sewing machine to obtain the heat generation power of the second main motor and the heat generation power of the second holding motor corresponding to the first spindle speed.

[0059] The heat generation power of the second main motor, the heat generation power of the second holding motor, the internal equivalent thermal conductivity, and the external equivalent thermal conductivity corresponding to the first spindle speed are input into the thermodynamic model to obtain the overlock machine temperature corresponding to the first spindle speed, wherein the first spindle speed is any spindle speed.

[0060] Based on the difference between the overlock machine temperature corresponding to the first spindle speed and the actual overlock machine temperature, the internal equivalent thermal conductivity and the external equivalent thermal conductivity are adjusted to obtain the target internal equivalent thermal conductivity and the target external equivalent thermal conductivity corresponding to the first spindle speed. The target internal equivalent thermal conductivity, the target external equivalent thermal conductivity, the heat generation power of the second main motor and the heat generation power of the second holding motor corresponding to the first spindle speed are input into the thermodynamic model. The difference between the obtained overlock machine temperature and the actual overlock machine temperature is less than the difference threshold.

[0061] The initial mapping relationship between the spindle speed and the internal equivalent thermal conductivity of the overlock sewing machine is determined based on the first spindle speed and the target internal equivalent thermal conductivity corresponding to the first spindle speed.

[0062] In this embodiment, the closed-space filling equivalent medium method is used to simplify the complex internal solid-fluid coupling heat transfer process into the heat conduction process of the equivalent medium. The thermal conductivity of the equivalent medium is related to the spindle speed. A mapping relationship between spindle speed and internal equivalent thermal conductivity is established through calibration using prototype temperature test data. .

[0063] The initial mapping relationship between the spindle speed and the external equivalent thermal conductivity of the overlock sewing machine is determined based on the first spindle speed and the target external equivalent thermal conductivity corresponding to the first spindle speed.

[0064] Calibration was performed using temperature test data from the prototype machine to establish a mapping relationship between rotational speed and external equivalent thermal conductivity. .

[0065] Optionally, based on the initial mapping relationship between the spindle speed and target parameters of the overlock sewing machine, and the running and stopping times corresponding to the break-in conditions, the target mapping relationship between the spindle speed and heat generation power of the overlock sewing machine is determined, including: Based on the initial mapping relationship between the spindle speed and heat generation power of the overlock sewing machine, the running time, stopping time, and the first formula corresponding to the break-in condition, the target mapping relationship between the spindle speed and heat generation power is determined, where the first formula is: ; in, The function corresponding to the target mapping relationship between spindle speed and heat generation power, where n is the spindle speed. For heat generation power, This refers to the running time corresponding to the break-in condition. The stopping time corresponding to the running-in condition. The function corresponding to the initial mapping relationship between the spindle speed and the heat generation power of the second main motor. It is a function corresponding to the initial mapping relationship between the spindle speed and the heat generation power of the second holding motor, with the spindle speed being zero.

[0066] In this embodiment, the initial mapping relationship between the spindle speed and the heat generation power of the overlock sewing machine includes: the initial mapping relationship between the spindle speed and the heat generation power of the second main motor, and the initial mapping relationship between the spindle speed and the heat generation power of the second holding motor.

[0067] In this embodiment, the target mapping relationship between the spindle speed and air volume of the overlock sewing machine is determined based on the initial mapping relationship between the spindle speed and air volume, the running time and stop time corresponding to the break-in condition, and the third formula. The third formula is: , This is the function corresponding to the initial mapping relationship between the spindle speed and air volume of the overlock sewing machine. This is the function corresponding to the target mapping relationship between the spindle speed and air volume of the overlock sewing machine.

[0068] Optionally, the target mapping relationship between the spindle speed and equivalent thermal conductivity of the overlock sewing machine includes the target mapping relationship between the spindle speed and the internal equivalent thermal conductivity, and the target mapping relationship between the spindle speed and the external equivalent thermal conductivity. The initial mapping relationship between the spindle speed and the equivalent thermal conductivity of the overlock sewing machine includes the initial mapping relationship between the spindle speed and the internal equivalent thermal conductivity, and the initial mapping relationship between the spindle speed and the external equivalent thermal conductivity. Based on the initial mapping relationship between the spindle speed and equivalent thermal conductivity of the overlock sewing machine, and the running and stopping times corresponding to the break-in conditions, the target mapping relationship between the spindle speed and equivalent thermal conductivity of the overlock sewing machine is determined, including: Based on the initial mapping relationship between spindle speed and equivalent thermal conductivity, the running time and stopping time corresponding to the running-in condition, and the second formula, the target mapping relationship between spindle speed and equivalent thermal conductivity is determined. The second formula is: ; ; in, The function corresponding to the target mapping relationship between the main spindle speed and the internal equivalent thermal conductivity, where n is the main spindle speed. For internal equivalent thermal conductivity, The function corresponding to the target mapping relationship between spindle speed and external equivalent thermal conductivity. External equivalent thermal conductivity The initial mapping relationship between spindle speed and internal equivalent thermal conductivity. The initial mapping relationship between spindle speed and external equivalent thermal conductivity. The thermal conductivity of air.

[0069] S120, based on the target mapping relationship between the spindle speed of the overlock sewing machine and the target parameters, determine the target parameters corresponding to the target spindle speed.

[0070] In this embodiment, the target parameters corresponding to the target spindle speed can be determined based on the target mapping relationship between the spindle speed and the target parameters as follows: the heat power corresponding to the target spindle speed is determined based on the target mapping relationship between the spindle speed and the heat generation power of the overlock sewing machine; the air volume corresponding to the target spindle speed is determined based on the target mapping relationship between the spindle speed and the air volume of the overlock sewing machine; and the equivalent thermal conductivity corresponding to the target spindle speed is determined based on the target mapping relationship between the spindle speed and the equivalent thermal conductivity of the overlock sewing machine.

[0071] S130, based on the target parameters corresponding to the target spindle speed, determines the overall temperature of the overlock sewing machine corresponding to the target spindle speed.

[0072] In this embodiment, the overall temperature of the overlock sewing machine corresponding to the target spindle speed is determined based on the heat generation power, air volume, and equivalent thermal conductivity corresponding to the target spindle speed.

[0073] The technical solution of this embodiment obtains the target mapping relationship between the spindle speed of the overlock sewing machine and target parameters, wherein the target parameters include: heat generation power, air volume and equivalent thermal conductivity; based on the target mapping relationship between the spindle speed and target parameters, the target parameters corresponding to the target spindle speed are determined; based on the target parameters corresponding to the target spindle speed, the overall temperature of the overlock sewing machine corresponding to the target spindle speed is determined, which can accurately and efficiently predict the overall temperature of the overlock sewing machine.

[0074] Example 2 Figure 2 A schematic diagram of an electronic device 10 that can be used to implement embodiments of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital assistants, cellular phones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0075] like Figure 2 As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory 12 or a random access memory 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the read-only memory 12 or loaded from storage unit 18 into the random access memory 13. The random access memory 13 may also store various programs and data required for the operation of the electronic device 10. The processor 11, read-only memory 12, and random access memory 13 are interconnected via a bus 14. An input / output interface 15 is also connected to the bus 14.

[0076] Multiple components in electronic device 10 are connected to I / O interface 15, including: input unit 16, such as keyboard, mouse, etc.; output unit 17, such as various types of displays, speakers, etc.; storage unit 18, such as disk, optical disk, etc.; and communication unit 19, such as network card, modem, wireless transceiver, etc. Communication unit 19 allows electronic device 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0077] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, central processing units, graphics processing units, various special-purpose artificial intelligence computing chips, various processors running machine learning model algorithms, digital signal processors, and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as the method for determining the overall temperature of an overlock sewing machine.

[0078] In some embodiments, the method for determining the overall temperature of an overlock sewing machine can be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed on electronic device 10 via read-only memory 12 and / or communication unit 19. When the computer program is loaded into random access memory 13 and executed by processor 11, one or more steps of the overlock sewing machine overall temperature determination method described above can be performed. Alternatively, in other embodiments, processor 11 can be configured to perform the overlock sewing machine overall temperature determination method by any other suitable means (e.g., by means of firmware).

[0079] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays, application-specific integrated circuits (ASICs), application-specific standard products (ASICs), systems-on-a-chip (SoCs), payload programmable logic devices, computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0080] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0081] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory, read-only memory, erasable programmable read-only memory, optical fibers, portable compact disk read-only memory, optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0082] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a cathode ray tube or liquid crystal display) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0083] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or computing systems that include middleware components (e.g., application servers), or computing systems that include frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0084] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to address the shortcomings of traditional physical hosts and virtual private servers, such as high management difficulty and weak business scalability.

[0085] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0086] This invention also provides a computer program product, including a computer program that, when executed by a processor, implements the method for determining the overall temperature of an overlock sewing machine according to any embodiment of the invention.

[0087] In the implementation of a computer program product, computer program code for performing the operations of this invention can be written in one or more programming languages ​​or a combination thereof. Programming languages ​​include object-oriented programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0088] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A method for determining the overall temperature of an overlock sewing machine, characterized in that, include: Obtain the target mapping relationship between the spindle speed of the overlock sewing machine and the target parameters, wherein the target parameters include: heat generation power, air volume and equivalent thermal conductivity; Based on the target mapping relationship between the spindle speed and target parameters of the overlock sewing machine, the target parameters corresponding to the target spindle speed are determined; Based on the target parameters corresponding to the target spindle speed, determine the overall temperature of the overlock sewing machine corresponding to the target spindle speed.

2. The method according to claim 1, characterized in that, Obtain the target mapping relationship between the spindle speed of the overlock sewing machine and the target parameters, including: Obtain the initial mapping relationship between the spindle speed and target parameters of the overlock sewing machine; Determine the running time and stop time corresponding to the running-in conditions; Based on the initial mapping relationship between the spindle speed and target parameters of the overlock sewing machine, and the running time and stopping time corresponding to the running-in condition, the target mapping relationship between the spindle speed and target parameters of the overlock sewing machine is determined.

3. The method according to claim 2, characterized in that, Obtain the initial mapping relationship between the spindle speed and heat generation power of the overlock sewing machine, including: The spindle speed, friction coefficient of each moving pair, motor energy efficiency coefficient, main electric drive component energy efficiency coefficient, and holding electric drive component energy efficiency coefficient of the overlock sewing machine are obtained. Input the spindle speed of the overlock sewing machine into the mechanical multibody dynamics model to obtain the holding torque, normal force of each kinematic pair and relative sliding speed; The frictional heat generation power of each kinematic pair is determined based on the normal force, friction coefficient, and relative sliding speed of each kinematic pair. The main motor shaft power is determined based on the sum of the frictional heat generated by each kinematic pair. The heat generation power of the first main motor is determined based on the main motor shaft power and the motor energy efficiency coefficient. The heat output power of the second main motor corresponding to the main shaft speed of the overlock sewing machine is determined based on the heat output power of the first main motor, the energy efficiency coefficient of the main electric drive components, and the shaft power of the main motor. The heat generation power of the first holding motor is determined based on the line current and phase resistance of the motor under the holding torque. The heat output power of the second holding motor corresponding to the spindle speed of the overlock sewing machine is determined based on the heat output power of the first holding motor and the energy efficiency coefficient of the holding electric drive component. The initial mapping relationship between the spindle speed and heat generation power of the overlock sewing machine is determined based on the spindle speed, the heat generation power of the second main motor corresponding to the spindle speed, and the heat generation power of the second holding motor corresponding to the spindle speed.

4. The method according to claim 2, characterized in that, Obtain the initial mapping relationship between the spindle speed and air volume of the overlock sewing machine, including: Input the spindle speed of the overlock sewing machine into the wind tunnel simulation model of the handwheel fan to obtain the air volume corresponding to the spindle speed of the overlock sewing machine; The initial mapping relationship between the spindle speed and air volume of the overlock sewing machine is determined based on the spindle speed and the corresponding air volume.

5. The method according to claim 2, characterized in that, The initial mapping relationship between the spindle speed and the equivalent thermal conductivity of the overlock sewing machine includes the initial mapping relationship between the spindle speed and the internal equivalent thermal conductivity, and the initial mapping relationship between the spindle speed and the external equivalent thermal conductivity. Obtain the initial mapping relationship between the spindle speed and equivalent thermal conductivity of the overlock sewing machine, including: The actual temperature of the overlock sewing machine during operation at the first spindle speed is obtained. Query the initial mapping relationship between the spindle speed and heat generation power of the overlock sewing machine to obtain the heat generation power of the second main motor and the heat generation power of the second holding motor corresponding to the first spindle speed; The heat generation power of the second main motor, the heat generation power of the second holding motor, the internal equivalent thermal conductivity, and the external equivalent thermal conductivity corresponding to the first spindle speed are input into the thermodynamic model to obtain the overlock machine temperature corresponding to the first spindle speed, wherein the first spindle speed is any spindle speed; Based on the difference between the overlock machine temperature corresponding to the first spindle speed and the actual overlock machine temperature, the internal equivalent thermal conductivity and the external equivalent thermal conductivity are adjusted to obtain the target internal equivalent thermal conductivity and the target external equivalent thermal conductivity corresponding to the first spindle speed. The target internal equivalent thermal conductivity, the target external equivalent thermal conductivity, the heat generation power of the second main motor and the heat generation power of the second holding motor corresponding to the first spindle speed are input into the thermodynamic model. The difference between the obtained overlock machine temperature and the actual overlock machine temperature is less than the difference threshold. Based on the first spindle speed and the target internal equivalent thermal conductivity corresponding to the first spindle speed, determine the initial mapping relationship between the spindle speed and the internal equivalent thermal conductivity of the overlock sewing machine; The initial mapping relationship between the spindle speed and the external equivalent thermal conductivity of the overlock sewing machine is determined based on the first spindle speed and the target external equivalent thermal conductivity corresponding to the first spindle speed.

6. The method according to claim 2, characterized in that, Based on the initial mapping relationship between the spindle speed and heat generation power of the overlock sewing machine, and the running and stopping times corresponding to the break-in conditions, the target mapping relationship between the spindle speed and heat generation power of the overlock sewing machine is determined, including: Based on the initial mapping relationship between the spindle speed and heat generation power of the overlock sewing machine, the running time, stopping time, and the first formula corresponding to the break-in condition, the target mapping relationship between the spindle speed and heat generation power is determined, where the first formula is: ； in, The function corresponding to the target mapping relationship between spindle speed and heat generation power, where n is the spindle speed. For heat generation power, This refers to the running time corresponding to the break-in period. The stopping time corresponding to the running-in condition. The function corresponding to the initial mapping relationship between the spindle speed and the heat generation power of the second main motor. It is a function corresponding to the initial mapping relationship between the spindle speed and the heat generation power of the second holding motor, with the spindle speed being zero.

7. The method according to claim 2, characterized in that, The target mapping relationship between the spindle speed and equivalent thermal conductivity of the overlock sewing machine includes the target mapping relationship between the spindle speed and the internal equivalent thermal conductivity, and the target mapping relationship between the spindle speed and the external equivalent thermal conductivity. The initial mapping relationship between the spindle speed and the equivalent thermal conductivity of the overlock sewing machine includes the initial mapping relationship between the spindle speed and the internal equivalent thermal conductivity, and the initial mapping relationship between the spindle speed and the external equivalent thermal conductivity. Based on the initial mapping relationship between the spindle speed and equivalent thermal conductivity of the overlock sewing machine, and the running and stopping times corresponding to the break-in conditions, the target mapping relationship between the spindle speed and equivalent thermal conductivity of the overlock sewing machine is determined, including: Based on the initial mapping relationship between spindle speed and equivalent thermal conductivity, the running time and stopping time corresponding to the running-in condition, and the second formula, the target mapping relationship between spindle speed and equivalent thermal conductivity is determined. The second formula is: ； ； in, The function corresponding to the target mapping relationship between the main spindle speed and the internal equivalent thermal conductivity, where n is the main spindle speed. For internal equivalent thermal conductivity, The function corresponding to the target mapping relationship between spindle speed and external equivalent thermal conductivity. External equivalent thermal conductivity The initial mapping relationship between spindle speed and internal equivalent thermal conductivity. The initial mapping relationship between spindle speed and external equivalent thermal conductivity. The thermal conductivity of air.

8. An electronic device, characterized in that, The electronic device includes: At least one processor; and A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the method for determining the overall temperature of the overlock sewing machine according to any one of claims 1-7.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that cause a processor to execute the method for determining the overall temperature of the overlock sewing machine according to any one of claims 1-7.

10. A computer program product, characterized in that, The computer program product includes a computer program that, when executed by a processor, implements the method for determining the overall temperature of an overlock sewing machine according to any one of claims 1-7.

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