Vehicle warning sound generation method, device, equipment and storage medium

Abstract

The application discloses a vehicle warning sound generation method, device and equipment and a storage medium, relates to the technical field of low-speed warning sound generation, and discloses a vehicle warning sound generation method, which comprises the following steps: when a calibration instruction is detected, obtaining an initial rotating speed and an initial torque according to a simulation test bench, and obtaining an initial current value and an initial current angle according to a computer upper computer; obtaining an adjusted current angle according to the initial rotating speed, the initial torque, the initial current value and the initial current angle; obtaining an adjusted current value according to the initial rotating speed, the initial torque and the adjusted current angle; obtaining an updated rotating speed and an updated torque, and obtaining a target current value and a target current angle according to the initial rotating speed, the updated torque, the updated rotating speed, the adjusted current value and the adjusted current angle; and generating a vehicle warning sound according to the target current value and the target current angle. The rotating speed, the torque, the current value and the current angle of the motor are calibrated through the simulation test bench, and the generation of the low-speed vehicle warning sound is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of low-speed warning sound generation, in particular to a vehicle warning sound generation method, device, equipment and storage medium. BACKGROUND

[0002] With the rapid development of new energy electric vehicles, related safety problems have also emerged. Since new energy vehicles are mainly driven by electric motors at low speed, they cannot achieve the noise characteristics of traditional internal combustion engine vehicles under low-speed working conditions. Compared with traditional fuel vehicles, the reduction of noise reduces environmental noise, but this reduced noise also makes it difficult for other road users, including pedestrians, cyclists, especially the blind and visually impaired, to perceive the approach of the vehicle, thereby increasing the risk of traffic accidents. Therefore, in order to improve the perceptibility of electric vehicles in low-speed driving state and effectively protect the personal safety of other road users including pedestrians, relevant units have formulated specifications for low-speed warning sound of electric vehicles, requiring pure electric vehicles to be equipped with warning sound function. The traditional warning sound function is usually implemented by an Acoustic Vehicle Alerting System (AVAS) system.

[0003] However, the AVAS system is generally composed of a controller unit and a sound generating mechanism (usually a loudspeaker), which needs to be suitable for a working environment of -40°C to 85°C, and the waterproof level should not be less than IP67. The cost of the AVAS system that meets the use standard is usually tens to hundreds of yuan, which requires additional power communication wire harness and space arrangement, and requires a large amount of debugging development cost and test cost, and the use cost and installation complexity are high.

[0004] The above content is only used to assist in understanding the technical solutions of the present application, and does not represent the acknowledgement of the above content as prior art. SUMMARY

[0005] The main purpose of the present application is to provide a vehicle warning sound generation method, device, equipment and storage medium, which aims to solve the technical problems of ensuring that electric vehicles can effectively warn pedestrians when driving at low speed, and reducing the installation complexity and cost.

[0006] To achieve the above purpose, the present application provides a vehicle warning sound generation method, which comprises:

[0007] When the calibration instruction is detected, the initial speed and the initial torque are obtained according to the simulation test bench, and the initial current value and the initial current angle are obtained according to the computer host computer;

[0008] The adjustment current angle is obtained according to the initial speed, the initial torque, the initial current value and the initial current angle;

[0009] obtaining an adjustment current value according to the initial rotation speed, the initial torque and the adjustment current angle;

[0010] obtaining an updated rotation speed and an updated torque, and obtaining a target current value and a target current angle according to the initial rotation speed, the updated torque, the updated rotation speed, the adjustment current value and the adjustment current angle;

[0011] generating a vehicle warning sound according to the target current value and the target current angle.

[0012] In an embodiment, the step of obtaining an adjustment current angle according to the initial rotation speed, the initial torque, the initial current value and the initial current angle comprises:

[0013] obtaining a first decibel value according to the initial rotation speed, the initial torque, the initial current value and the initial current angle;

[0014] obtaining an increased current angle according to the initial current angle and a preset current angle;

[0015] obtaining a second decibel value according to the initial rotation speed, the initial torque, the initial current value and the increased current angle;

[0016] obtaining a target decibel value according to the first decibel value and the second decibel value;

[0017] obtaining a corresponding current angle according to the target decibel value, and taking the corresponding current angle as the adjustment current angle.

[0018] In an embodiment, the step of obtaining an updated rotation speed and an updated torque comprises:

[0019] obtaining a preset torque value and a preset rotation speed set;

[0020] obtaining an updated torque according to the preset torque value and the initial torque;

[0021] obtaining a preset rotation speed according to the preset rotation speed set;

[0022] obtaining an updated rotation speed according to the preset rotation speed.

[0023] In an embodiment, the step of obtaining a target current value and a target current angle according to the initial rotation speed, the updated torque, the updated rotation speed, the adjustment current value and the adjustment current angle comprises:

[0024] obtaining an updated torque current value and an updated torque current angle according to the initial rotation speed, the updated torque, the adjustment current value and the adjustment current angle;

[0025] The target current value and the target current angle are obtained according to the updated rotation speed, the updated torque, the adjusted current value and the adjusted current angle.

[0026] In an embodiment, the simulation test bench further comprises a noise vibration roughness acquisition device and a noise vibration roughness host computer, and the noise vibration roughness acquisition device and the noise vibration roughness host computer are connected through a low-voltage line.

[0027] After the step of generating a vehicle warning sound according to the target current value and the target current angle, the method further comprises:

[0028] According to the target current value, the target current angle and the computer host computer, a sound wave frequency and an amplitude are obtained.

[0029] According to the sound wave frequency, the amplitude and the noise vibration roughness acquisition device, sound data are obtained.

[0030] According to the sound data and the noise vibration roughness host computer, a noise analysis result is obtained.

[0031] According to the noise analysis result, a warning sound verification is performed.

[0032] In an embodiment, the step of obtaining an adjusted current value according to the initial rotation speed, the initial torque and the adjusted current angle comprises:

[0033] A third decibel value is obtained according to the initial rotation speed, the initial torque and the adjusted current angle.

[0034] A corresponding current value is obtained according to the third decibel value, and the corresponding current value is taken as the adjusted current value.

[0035] In an embodiment, the simulation test bench further comprises a dynamometer and a dynamometer host computer, and the dynamometer and the dynamometer host computer are connected through a low-voltage line.

[0036] When a calibration instruction is detected, the step of obtaining an initial rotation speed and an initial torque according to the simulation test bench comprises:

[0037] The initial rotation speed is obtained by controlling the dynamometer to set the motor speed according to the calibration instruction.

[0038] The initial torque is obtained by controlling the dynamometer host computer to set the motor torque according to the calibration instruction.

[0039] In addition, to achieve the above object, the application further provides a vehicle warning sound generation device, which comprises a detection module, configured to obtain an initial rotation speed and an initial torque according to a simulation test bench when a calibration instruction is detected, and obtain an initial current value and an initial current angle according to a computer host;

[0040] an adjustment module, configured to obtain an adjustment current angle according to the initial rotation speed, the initial torque, the initial current value and the initial current angle;

[0041] the adjustment module is further configured to obtain an adjustment current value according to the initial rotation speed, the initial torque and the adjustment current angle;

[0042] an update module, configured to obtain an updated rotation speed and an updated torque, and obtain a target current value and a target current angle according to the initial rotation speed, the updated torque, the updated rotation speed, the adjustment current value and the adjustment current angle;

[0043] a generation module, configured to generate a vehicle warning sound according to the target current value and the target current angle.

[0044] In addition, to achieve the above object, the application further provides a vehicle warning sound generation device, which comprises a memory, a processor and a computer program stored in the memory and executable on the processor, and the computer program is configured to implement the steps of the vehicle warning sound generation method.

[0045] In addition, to achieve the above object, the application further provides a storage medium, which is a computer readable storage medium, and the storage medium stores a computer program, and the computer program is executed by a processor to implement the steps of the vehicle warning sound generation method.

[0046] In addition, to achieve the above object, the application further provides a computer program product, which comprises a computer program, and the computer program is executed by a processor to implement the steps of the vehicle warning sound generation method.

[0047] The one or more technical solutions provided by the application have at least the following technical effects:

[0048] By acquiring the rotating speed and torque of the motor in the initial stage, and combining the computer host to set and adjust the current value and current angle, the warning sound can be adjusted in real time under different driving conditions. Then, by capturing and analyzing the updated rotating speed and torque information, the generation of the warning sound is further refined, which not only ensures that the electric vehicle can effectively warn pedestrians when driving at low speed, but also reduces the complexity and cost of the implementation through integrated and automated current control process. Compared with the prior art, this scheme improves the flexibility and efficiency of the warning system by dynamically adjusting the current parameters to adapt to changes in driving conditions, effectively enhancing the functionality and economy of the electric vehicle warning system. BRIEF DESCRIPTION OF DRAWINGS

[0049] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments consistent with the present application and, together with the description, further serve to explain the principles of the application.

[0050] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, those skilled in the art can obtain other drawings according to these drawings without any creative effort.

[0051] Figure 1 The flowchart provided by the vehicle warning sound generation method embodiment one of the present application;

[0052] Figure 2 The schematic diagram of the simulation test bench structure provided by the vehicle warning sound generation method embodiment one of the present application;

[0053] Figure 3 The control system schematic diagram of the permanent magnet synchronous motor provided by the vehicle warning sound generation method embodiment one of the present application;

[0054] Figure 4 The flowchart provided by the vehicle warning sound generation method embodiment two of the present application;

[0055] Figure 5 The brief flowchart of the vehicle warning sound generation method provided by the embodiment two of the present application;

[0056] Figure 6 The module structure schematic diagram of the vehicle warning sound generation device of the embodiment of the present application;

[0057] Figure 7 The device structure schematic diagram of the hardware running environment involved in the vehicle warning sound generation method in the embodiment of the present application.

[0058] The purpose implementation, functional characteristics and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0059] It should be understood that the specific embodiments described herein are merely exemplary of the application and do not limit the application.

[0060] In order to better understand the technical solutions of the present application, the following will be described in detail in combination with the accompanying drawings and specific embodiments.

[0061] The main solution of the embodiment of the present application is: when detecting a calibration instruction, obtaining an initial speed and an initial torque according to the simulation test bench, and obtaining an initial current value and an initial current angle according to the computer host;

[0062] Obtaining an adjustment current angle according to the initial speed, the initial torque, the initial current value and the initial current angle;

[0063] Obtaining an adjustment current value according to the initial speed, the initial torque and the adjustment current angle;

[0064] Obtaining a target current value and a target current angle according to the initial speed, the updated torque, the updated speed, the adjustment current value and the adjustment current angle;

[0065] Generating a vehicle warning sound according to the target current value and the target current angle.

[0066] In the embodiment, for the convenience of description, the following describes the identification vehicle warning sound generation device as the execution subject.

[0067] Since the prior art ensures that the electric vehicle can effectively warn pedestrians when driving at low speed, and reduces the complexity and cost of implementation, the present application provides a solution, which obtains the speed and torque of the motor in the initial stage, and sets and adjusts the current value and current angle in combination with the computer host, so as to adjust the warning sound in real time under different driving conditions. Then, by capturing and analyzing the updated speed and torque information, the generation of the warning sound is further refined, which not only ensures that the electric vehicle can effectively warn pedestrians when driving at low speed, but also reduces the complexity and cost of implementation through integrated and automated current control process. Compared with the prior art, this scheme adjusts the current parameters dynamically to adapt to the change of driving conditions, improves the flexibility and efficiency of the warning system, and effectively enhances the functionality and economy of the electric vehicle warning system.

[0068] It should be noted that the execution subject of the embodiment can be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device, a vehicle warning sound generation device, etc. capable of realizing the above functions. The vehicle warning sound generation device is taken as an example to describe the embodiment and the following embodiments.

[0069] Based on this, the embodiment of the present application provides a vehicle warning sound generation method, which is described with reference to Figure 1 , Figure 1 The flowchart of the first embodiment of the vehicle warning sound generation method of the present application is shown in FIG. 1.

[0070] In the embodiment, the vehicle warning sound generation method comprises steps S10-S50:

[0071] Step S10, when the calibration instruction is detected, the initial speed and the initial torque are obtained according to the simulation test bench, and the initial current value and the initial current angle are obtained according to the computer host;

[0072] It should be noted that the calibration instruction is a set of instructions issued from the control system, which is used to start a specific test program to calibrate and confirm whether the performance parameters of the device meet the preset standard. In the embodiment, the calibration instruction triggers the operation of the simulation test bench to start collecting motor running data.

[0073] In addition, it should be noted that the simulation test bench is a device specially designed for testing and simulating the performance of the motor. It can provide a simulated environment under actual operating conditions to accurately measure the speed, torque and other key operating parameters of the motor. Refer to FIG. 2, Figure 2 The structure diagram of the simulation test bench provided in the first embodiment of the vehicle warning sound generation method of the present application is shown in FIG. 2.

[0074] As shown in FIG. 2, the simulation test bench comprises a motor 21, a speed sensor 22, a torque sensor 23, a current sensor 24, a computer host 25, a data acquisition card 26, a data storage device 27 and a data analysis software 28. Figure 2The simulation test bench, shown in Figure 1, includes the layout and connections of the power supply, control equipment, testing equipment, and cooling system. Starting from the left, a high-voltage DC power supply (yellow wire) supplies power to the controller. Meanwhile, a 12V power supply (black wire) provides power to the host PC and NVH data acquisition equipment, ensuring data processing and issuing control commands. The controller, the core of the system, receives control commands from the host PC and controls the motor accordingly. High-voltage power is transmitted to the motor via the high-voltage wire, while control signals are transmitted via the low-voltage wire. The motor is connected to the test bench, which supports the motor and connects to the dynamometer. The dynamometer accurately measures the motor's torque and speed. This data is collected by the NVH data acquisition equipment, which also collects vibration and noise data generated by the motor to help evaluate its performance. The power and data connections of all equipment ensure accurate testing and effective coordination. Microphones are located 1 meter above, to the left, to the right, in front, and behind the motor, and 0.1 meter near the motor and reducer. The blue lines represent water pipes, which are connected to the motor and controller and are used for cooling the system to ensure temperature control of the motor and controller during operation and prevent overheating from affecting test results and equipment safety.

[0075] It should be noted that the initial speed refers to the motor's intended speed at startup, typically expressed in revolutions per minute (rpm). The initial speed affects the noise level because the motor's speed is directly related to the rotational speed of its internal magnetic field, which in turn affects the frequency and vibration pattern of the motor's internal electromagnetic forces. As the motor speed changes, the torque generated by the rotating magnetic field also changes, resulting in varying vibration and noise output. The initial torque refers to the torque generated by the motor during startup. The initial torque affects the noise level because the torque generated by the motor changes the interaction force between the rotor and stator. This change in force is converted into vibration, which in turn generates noise. The initial current value refers to the current flowing through the motor windings during startup. The initial current value affects the noise level because the current flowing through the motor windings generates a magnetic field. This magnetic field interacts with the motor's permanent magnets, generating torque and vibration. The initial current angle refers to the phase angle of the current during motor startup. The initial current angle affects the noise level because the difference in current phase causes the interaction pattern of the magnetic field to change, which in turn affects the torque and vibration pattern within the motor.

[0076] In a feasible implementation, step S10 may include steps S11 to S12:

[0077] Step S11, controlling the dynamometer to set the motor speed according to the calibration instruction to obtain an initial speed;

[0078] It can be understood that the dynamometer is controlled according to the calibration instruction to set the rotating speed of the motor. In this process, the dynamometer adjusts the motor to a predetermined initial rotating speed based on the input instruction, and the rotating speed is selected based on the expected sound decibel level. The motor is kept running at this rotating speed to accurately simulate the sound output characteristics of the motor in subsequent tests.

[0079] In step S12, the motor torque is set by the host computer of the dynamometer according to the calibration instruction, and an initial torque is obtained.

[0080] It can be understood that the required torque value is set in the host computer of the dynamometer, and the dynamometer then ensures that the motor runs at this torque value. Proper torque setting can ensure that the motor can generate sufficient vibration in actual application to achieve the required sound decibel level.

[0081] In step S20, an adjusted current angle is obtained according to the initial rotating speed, the initial torque, the initial current value, and the initial current angle.

[0082] It should be noted that the adjusted current angle refers to the current angle obtained by changing the phase angle of the current to achieve better motor control effect. In the motor control system, the current angle has a direct impact on the torque output and efficiency of the motor.

[0083] It can be understood that the initial operating data of the motor, including the initial rotating speed, the initial torque, the initial current value, and the initial current angle, are collected from the simulation test bench and the computer host. The current angle under the conditions of fixed rotating speed, torque, and current amplitude is traversed to find the optimal current angle under the current amplitude. The optimal current angle is the adjusted current angle, which represents the current angle with the maximum decibel under the condition.

[0084] In one possible implementation, step S20 can include steps S21-S25:

[0085] In step S21, a first decibel value is obtained according to the initial rotating speed, the initial torque, the initial current value, and the initial current angle.

[0086] It should be noted that the first decibel value is the sound loudness generated by the motor measured under the conditions of initial rotating speed, initial torque, initial current value, and initial current angle, and is measured in decibels (dB). This value reflects the sound output level of the motor before any additional current angle adjustment. The first decibel value is measured for comparison with the sound output after subsequent adjustment.

[0087] It can be understood that the sound decibel value generated by the motor is calculated in combination with the initial rotation speed, the initial torque, the initial current value and the initial current angle, and a first decibel value is obtained. This process involves evaluating the performance of the motor by accurately measuring its sound output under these initial conditions.

[0088] In step S22, an increased current angle is obtained according to the initial current angle and a preset current angle.

[0089] It should be noted that the preset current angle is a current phase angle set according to a predetermined target before testing, indicating the step size of the increase of the initial current angle. The increased current angle is the current angle value obtained after the initial current angle is increased by the preset current angle.

[0090] It can be understood that the increased current angle is calculated according to the preset current angle and the initial current angle, and the phase angle of the current can be adjusted to explore the effect of different current angles on the sound output in subsequent tests.

[0091] In step S23, a second decibel value is obtained according to the initial rotation speed, the initial torque, the initial current value and the increased current angle.

[0092] It should be noted that the second decibel value is the loudness of the sound generated by the motor after the current angle has been adjusted, i.e. after the increased current angle is applied, and is used to evaluate the effect of adjusting the current angle on the sound output. By comparing the first decibel value and the second decibel value, it can be determined which current angle setting is more effective in improving or adjusting the loudness of the sound.

[0093] It can be understood that the sound output of the motor under the adjusted conditions is evaluated again by using the increased current angle obtained from step S22, and the second decibel value is obtained.

[0094] In step S24, a target decibel value is obtained according to the first decibel value and the second decibel value.

[0095] It should be noted that the target decibel value is the larger one of the first decibel value and the second decibel value, and is the most ideal sound loudness level determined in the test, which is used to ensure that the alert sound effect of the motor is maximized. After adjusting the current angle, the setting that produces a louder sound can be selected to improve the effectiveness of the alert sound.

[0096] In step S25, a corresponding current angle is obtained according to the target decibel value, and the corresponding current angle is used as the adjusted current angle.

[0097] It should be noted that the corresponding current angle is the current angle value corresponding to the target decibel value, which is used to adjust the current phase of the motor to achieve the predetermined sound output level.

[0098] It can be understood that the corresponding current angle is selected according to the target decibel value, and the angle is set as the adjustment current angle, so that the motor uses the current angle in subsequent operation to generate a sound decibel value meeting the requirement.

[0099] In step S30, an adjustment current value is obtained according to the initial rotation speed, the initial torque and the adjustment current angle.

[0100] It should be noted that the adjustment current value is a new current value calculated based on the initial motor state and the adjustment current angle, and represents the current input required to achieve the maximum decibel under the adjustment current angle.

[0101] It can be understood that the appropriate adjustment current value is calculated according to the initial operating conditions of the motor, i.e., the initial rotation speed and the initial torque and the preset current angle. The adjustment current value needs to be particularly considered how to achieve the goal of reducing or controlling the noise output without sacrificing the efficiency of the motor. The calculation process is usually performed by a computer host, which determines the optimal current setting according to the motor characteristics and the preset noise output target, such as the decibel level, by comprehensively considering the initial parameters and the current angle adjustment.

[0102] In one possible implementation, step S30 can include steps S31-S32:

[0103] In step S31, a third decibel value is obtained according to the initial rotation speed, the initial torque and the adjustment current angle.

[0104] It should be noted that the third decibel value is the sound loudness generated by the motor after the fixed adjustment current angle is applied, and the third decibel value is measured after the optimal current angle, i.e., the adjustment current angle, is obtained.

[0105] It can be understood that the adjusted current angle is applied when the motor is running, and the sound loudness generated by the motor under these conditions is measured. By precisely controlling the current angle, the effect of the current value setting on the sound decibel of the motor can be observed, so as to evaluate which current value is more suitable for achieving the desired sound effect.

[0106] In step S32, a corresponding current value is obtained according to the third decibel value, and the corresponding current value is set as the adjustment current value.

[0107] It should be noted that the corresponding current value is based on the current size corresponding to the third decibel value, and is used to adjust the current input of the motor to achieve the required sound loudness.

[0108] It can be understood that the corresponding current value required for the operation of the motor is determined according to the measured third decibel value. In this step, the required current size is obtained according to the demand for sound loudness, and is set as the operating current of the motor, which ensures that the motor can maintain efficiency and performance while achieving the maximum sound effect.

[0109] In step S40, an updated speed and an updated torque are obtained, and a target current value and a target current angle are obtained according to the initial speed, the updated torque, the updated speed, the adjusted current value, and the adjusted current angle.

[0110] It should be noted that the updated speed refers to a new speed value set during the motor test process according to the need to adjust or respond to specific test requirements. This speed may be adjusted according to experimental design or performance optimization requirements to ensure that the motor can meet the required decibel standard under different operating conditions. The updated torque is the torque value adjusted during the test process. The adjustment of the torque is usually to simulate the performance of the motor under different loads or different operating conditions.

[0111] In addition, it should be noted that the target current value is the ideal current size calculated in the test or operation to maximize the noise output, which directly affects the vibration frequency and vibration intensity of the motor, thereby maximizing the sound output. The target current angle is the phase angle of the current input set to maximize the noise. By adjusting the current angle, the magnetic field distribution and electromagnetic action mode inside the motor can be changed, thereby enhancing the vibration mode and vibration intensity generated by the motor and improving the size of the noise.

[0112] It can be understood that after obtaining the updated speed and torque parameters, the initial speed and the previously adjusted current parameters are combined to determine the final target current value and target current angle required. This step is crucial to ensure that the motor can produce as much noise as possible under new operating conditions.

[0113] In one possible implementation, step S40 can include steps A41-A44:

[0114] In step A41, a preset torque value and a preset speed set are obtained.

[0115] It should be noted that the preset torque value is a torque value increase step set in advance before the test according to specific purposes or parameter requirements. In this embodiment, the torque is increased in steps of 20 Nm.

[0116] In addition, it should be noted that the preset speed set is a set of motor operating speeds determined before testing, aiming to explore and determine the performance of the motor at different speeds. These speeds are selected to simulate various operating conditions that the motor may encounter in actual use. In this embodiment, the preset speed set includes 10 km / h, 20 km / h, -6 km / h, which are used to simulate the low-speed driving conditions of the vehicle.

[0117] Step A42, obtaining an updated torque according to the preset torque value and the initial torque;

[0118] It should be noted that the updated torque is a new torque value obtained by adjusting the initial torque plus the preset torque value, in order to ensure that the motor can achieve higher or specific performance requirements in testing, especially when the behavior of the motor under higher load needs to be tested.

[0119] It can be understood that the process of calculating the updated torque is to add the preset torque value to the initial torque. This method is usually used to adjust the motor to adapt to higher load requirements or simulate specific operating conditions. The operator or automated system will calculate the final torque setting according to the initial torque and the preset additional torque value, ensuring that the motor can operate according to this new torque value in actual testing or operation.

[0120] Step A43, obtaining a preset speed according to the preset speed set;

[0121] It should be noted that the preset speed is a specific speed selected from the preset speed set, used to set the operating speed of the motor in a specific test phase.

[0122] It can be understood that the appropriate speed is selected from the preset speed set as the preset speed. This selection is based on the understanding of the performance of the motor at different speeds, ensuring that the performance of the motor at these speeds can be evaluated in subsequent testing.

[0123] Step A44, obtaining an updated speed according to the preset speed.

[0124] It can be understood that the operating speed of the motor is set according to the selected preset speed to obtain the updated speed. This new speed will be used in the next test phase to observe the performance and output characteristics of the motor at this speed.

[0125] In a possible implementation, step S40 can further include steps B41-B42:

[0126] Step B41, obtaining an updated torque current value and an updated torque current angle according to the initial speed, the updated torque, the adjusted current value, and the adjusted current angle;

[0127] It is important to note that the updated torque current value is a new current value calculated based on the updated torque and the initial speed, the updated torque, the adjusted current value, and the adjusted current angle. This new value is used to more accurately control the operation and output characteristics of the electric motor.

[0128] It is understood that the updated torque current value and the updated torque current angle are calculated based on the initial speed, the updated torque, the adjusted current value, and the adjusted current angle. This step is to ensure that the electric motor can achieve the expected operating characteristics, including but not limited to torque output and sound level, under the adjusted torque and current settings. These adjustments optimize the electromagnetic and mechanical behavior of the motor by fine-tuning the current input and phase angle.

[0129] Step B42, obtaining a target current value and a target current angle based on the updated speed, the updated torque, the adjusted current value, and the adjusted current angle.

[0130] It is important to note that the updated torque current angle is a new current angle obtained after adjusting the torque and current. This angle adjustment helps optimize the performance and output of the electric motor.

[0131] It is understood that the target current value and the target current angle are further calculated based on the updated speed, the updated torque, the adjusted current value, and the adjusted current angle. These parameters are optimized based on the expected performance and output of the electric motor under the latest settings, with the goal of ensuring that the electric motor can operate optimally under new test or operating conditions, meeting the required performance standards.

[0132] In addition, it is understood that steps B41-B42 represent that under the condition of fixed speed, the torque is increased by 20 Nm steps, i.e. preset torque values, and the optimization steps of harmonic injection current angle and current amplitude are repeated for each torque point to determine the optimal harmonic injection parameters for each torque point at that speed. Then, the speed is traversed: at the preset speed set of 10 km / h, 20 km / h, -6 km / h, the harmonic injection current angle optimization, current amplitude optimization and torque traversal steps are repeated, so as to obtain the optimal harmonic injection parameters of all torque points at each speed. This ensures that the performance of the motor can be accurately adjusted under different operating conditions to achieve the best efficiency and output effect.

[0133] Step S50, generating a vehicle warning sound based on the target current value and the target current angle.

[0134] It is important to note that the vehicle warning sound refers to the sound emitted by the vehicle to alert pedestrians and other vehicles of its presence. This warning sound typically needs to reach a certain sound pressure level, i.e. decibels, to ensure that it can be clearly heard in various environments. The design of the warning sound aims to enhance road safety, especially for electric and hybrid vehicles.

[0135] It can be understood that the calculated target current value and target current angle are input to the controller of the electric motor. These parameters guide the controller to adjust the size and phase of the current flowing to the motor, thereby changing the electromagnetic behavior of the motor when it is running. During the operation of the permanent magnet synchronous motor, due to the nonlinear characteristics of the inverter and the process characteristics of the motor body, a large number of harmonic components will be contained in the phase voltage and phase current of the motor, and these harmonic voltages will increase the rotor hysteresis and eddy current loss of the permanent magnet synchronous motor, and the harmonic current will increase the copper loss of the motor stator winding, causing output torque ripple, vibration, noise, etc. Therefore, the periodic or non-periodic vibrations caused by the electromagnetic effect and mechanical structure characteristics inside the motor propagate through the motor structure and radiate sound waves, by injecting harmonic currents of specific frequencies to interact with the fundamental magnetic field generated by the permanent magnet to produce radial electromagnetic forces of specific spatial orders and frequencies, by adjusting the current phase and amplitude to increase the target radial electromagnetic force, thereby increasing the vibration and noise caused by the harmonics, forming an alarm sound. The design purpose of this alarm sound is to ensure that pedestrians and other vehicles can clearly hear the approach of the vehicle under different environmental conditions, such as urban low-speed driving or in a parking lot, thereby improving road safety.

[0136] In addition, it can be understood that the embodiment is applied to a permanent magnet synchronous motor with reference to 3, Figure 3 The control system of the permanent magnet synchronous motor provided for the first embodiment of the vehicle alarm sound generation method of the present application is shown in the figure.

[0137] As Figure 3 shown, the control system for the permanent magnet synchronous motor aims to control the motor to produce sound through harmonic injection, thereby replacing the traditional low-speed pedestrian warning sound system. The system includes several core components. First, the three-phase current ia, ib, ic is converted into dq-axis current id and iq through the ABC / dq conversion module. In this process, by modulating the id and iq currents, a harmonic current Delta id is added in the id control, and Delta iq is injected into the iq axis, which helps to produce specific sound effects. Next, the required dq-axis voltages Ud and Uq are calculated through the control algorithm. These voltages are modulated through the space vector pulse width modulation technique to convert them into voltage signals that the motor can accept. The inverter part of the system converts the direct current Udc into three-phase alternating current for the motor to use. In the motor model, the running state of the motor after receiving the processed voltage and current signals is shown. In addition, the system also includes a harmonic injection control part that precisely controls the injection of harmonics through the angle theta and current amplitude is to adjust the sound characteristics and intensity produced. The entire control system aims to produce sound through the electromagnetic effect and mechanical characteristics of the motor, replacing the traditional low-speed pedestrian warning sound, thereby improving the safety of electric vehicles when driving at low speed.

[0138] The embodiment provides a vehicle warning sound generation method, which solves the technical problem that a traditional electric vehicle is difficult to effectively issue a pedestrian warning sound when running at low speed by applying an advanced harmonic injection technology and a motor control system, and achieves the beneficial effects of improving the recognition degree and safety of the warning sound of the electric vehicle in a city and a low-speed running environment. This technology uses specific harmonic current and current angle adjustment to accurately control the vibration and sound output of the motor, ensuring that the electric vehicle can issue a loud enough warning sound even in a low-speed state, thereby significantly improving the safety of pedestrians and other vehicles.

[0139] Based on the first embodiment of the application, the same or similar contents as the above embodiment one can refer to the above introduction, and the subsequent will not be described in detail. On this basis, please refer to Figure 4 , after step S50, the vehicle warning sound generation method comprises steps S60-S90:

[0140] Step S60, obtaining a sound wave frequency and amplitude according to the target current value, the target current angle and the computer host computer;

[0141] It should be noted that the sound wave frequency refers to the number of vibrations per second of the sound wave, and is measured in hertz (Hz). Frequency is the main factor determining the pitch of sound. Sound waves of different frequencies are perceived as different pitches in the auditory system. Amplitude refers to the intensity or amplitude of sound wave vibration, which affects the loudness of sound. In the test and operation of the motor, the size of the amplitude is directly related to the energy of the sound and its propagation effect in the environment.

[0142] It can be understood that the computer host computer calculates the sound wave frequency and amplitude that should be generated according to the set target current value and target current angle. This calculation is based on the electromagnetic characteristics of the motor and the predetermined sound output requirements, to ensure that the physical properties of the sound can meet the test or actual application requirements.

[0143] Step S70, obtaining sound data according to the sound wave frequency, the amplitude and the noise vibration roughness acquisition device;

[0144] It should be noted that the noise vibration roughness acquisition device is used to capture the sound and vibration data generated by the motor in operation in real time. The collected data includes sound wave frequency, amplitude, etc., which are crucial for analyzing the sound performance of the motor and adjusting the sound output. The noise vibration roughness host computer refers to a high-level computer system used to analyze the data received from the acquisition device. It processes the sound and vibration data and provides detailed analysis results, such as noise analysis results, which are used for further evaluation and verification.

[0145] It is understood that the noise and vibration roughness acquisition device collects sound data based on the calculated sound wave frequency and amplitude. These data provide the necessary basis for detailed analysis of the sound, which can evaluate the sound output characteristics of the motor under the current settings.

[0146] Step S80, according to the sound data and the noise and vibration roughness host computer, get the noise analysis results;

[0147] It should be noted that the noise analysis results are based on the collected sound data after processing by the noise and vibration roughness host computer. These results include detailed analysis of the sound characteristics, such as frequency range, amplitude, etc., which are key to evaluating the sound quality and compliance of the motor.

[0148] It is understood that the noise and vibration roughness host computer analyzes the collected sound data and generates noise analysis results. Noise analysis results can determine whether the sound output of the motor meets the expected standards and whether further adjustments are needed to optimize performance.

[0149] Step S90, according to the noise analysis results, perform warning sound verification.

[0150] It should be noted that the warning sound verification is a verification process to confirm whether the sound produced by the motor meets the predetermined safety and performance standards. This verification ensures that the warning sound of the motor can effectively alert personnel or other vehicles in actual use to prevent potential safety risks.

[0151] It is understood that the warning sound verification is based on the noise analysis results. This process ensures that the sound output of the motor not only meets technical and safety standards, but also effectively plays its warning role in actual operation, enhancing safety. For example, during warning sound verification, the operating parameters of the motor are set in a special test environment, including adjusting current values and current angles to generate specific sound wave frequencies and amplitudes. Then use the noise and vibration roughness acquisition device to capture the sound produced by the motor, record detailed sound data such as decibel level and frequency range. Subsequently, it is transmitted to the noise and vibration roughness host computer for in-depth analysis to generate noise analysis results, evaluate the clarity, loudness and whether there are undesirable frequency components of the sound. Finally, according to these analysis results, the test team will play the warning sound in a simulated urban traffic environment, observe and record the reactions of pedestrians and nearby drivers to confirm whether the warning sound can effectively warn personnel and improve pedestrian safety in actual application. If the test results show that the warning sound meets the safety standards and is effective in the actual environment, the warning sound is considered to be verified successfully, if it does not meet the expected effect, the team needs to adjust the sound parameters according to the feedback and verify again to ensure that each parameter can achieve the optimal warning effect and meet the safety standards.

[0152] In addition, it can be understood that after the preliminary verification, a whole vehicle test is also needed. The calibration results obtained on the harmonic injection bench are brushed into the control system of the whole vehicle, so as to verify the influence of the parameter settings on the electric drive sound generation system under the actual vehicle running conditions. The main purpose of the test is to confirm whether the warning sound generated by the electric vehicle during driving can meet the specific requirements of the pedestrian warning sound, such as whether the loudness, frequency and recognition of the sound are sufficient to warn pedestrians and other drivers in various environments to ensure their safety; if the test results meet the expectations, these harmonic injection parameters will be solidified into the production line settings of the vehicle and become the standard configuration, so as to ensure that each electric vehicle leaving the factory can achieve the same warning sound effect, thereby improving the driving safety.

[0153] The embodiment provides a vehicle warning sound generation method, which solves the technical problem that the warning sound of an electric vehicle under different running conditions is difficult to achieve consistency and effectiveness by adopting accurate current control and sound wave analysis technical means, and achieves the beneficial effect of ensuring that the warning sound of the electric vehicle has good recognition and sufficient loudness in various environments. This method accurately adjusts the frequency and amplitude of the generated sound wave by controlling the current angle and current value of the electric motor, and combines noise vibration roughness collection and analysis technology, which not only optimizes the quality and effect of the sound, but also ensures the safety standard of the warning sound through a strict verification process, thereby improving the safety of pedestrians and drivers.

[0154] Exemplarily, in order to help understand the implementation process of the vehicle warning sound generation method obtained after the embodiment one is combined with the above embodiment, please refer to Figure 5 , Figure 5 A schematic diagram of a brief process of a vehicle warning sound generation method is provided, and specifically:

[0155] After starting, the MCU performs initialization setting, sets the speed of the motor to -480, 800 or 1600 rpm, and sets the initial torque to 0 Nm, and then adjusts the torque to +20 Nm to adapt to the harmonic injection requirement. The system sets the amplitude adjustment of the harmonic current Is to +2 A, and then adjusts the current angle by 30 degrees each time to check the harmonic effect. If 360 degrees of traversal is not completed, the current angle is continuously adjusted until the current amplitude reaches 30 A. Once this condition is met, the best state is confirmed and the harmonic injection setting is completed. The whole process aims to realize harmonic injection by accurately controlling the torque, current amplitude and current angle of the motor, so as to make the motor generate sufficient sound when running at low speed to improve the safety of pedestrians, optimize the acoustic performance of the motor and reduce the cost and complexity of the traditional pedestrian warning system.

[0156] It should be noted that the above examples are only used for understanding the present application and do not constitute a limitation on the vehicle warning sound generation method of the present application, and more forms of simple transformation based on this technical concept are within the protection scope of the present application.

[0157] The present application also provides a vehicle warning sound generation device, please refer to Figure 6 , the vehicle warning sound generation device comprises:

[0158] The detection module 10 is used for obtaining an initial speed and an initial torque according to a simulation test bench when a calibration instruction is detected, and obtaining an initial current value and an initial current angle according to a computer host computer;

[0159] The adjustment module 20 is used for obtaining an adjustment current angle according to the initial speed, the initial torque, the initial current value and the initial current angle;

[0160] The adjustment module 20 is also used for obtaining an adjustment current value according to the initial speed, the initial torque and the adjustment current angle;

[0161] The update module 30 is used for obtaining an updated speed and an updated torque, and obtaining a target current value and a target current angle according to the initial speed, the updated torque, the updated speed, the adjustment current value and the adjustment current angle;

[0162] The generation module 40 is used for generating a vehicle warning sound according to the target current value and the target current angle.

[0163] The vehicle warning sound generation device provided by the present application adopts the vehicle warning sound generation method in the above embodiment, which can solve the technical problem of ensuring that the electric vehicle can effectively warn pedestrians when driving at low speed, and reducing the complexity and cost of the actual installation. Compared with the prior art, the vehicle warning sound generation device provided by the present application has the same beneficial effects as the vehicle warning sound generation method provided by the above embodiment, and the other technical features in the vehicle warning sound generation device are the same as the features disclosed in the above embodiment method, which will not be repeated here.

[0164] In an embodiment, the adjustment module 20 is also used for obtaining a first decibel value according to the initial speed, the initial torque, the initial current value and the initial current angle; obtaining an increased current angle according to the initial current angle and a preset current angle; obtaining a second decibel value according to the initial speed, the initial torque, the initial current value and the increased current angle; obtaining a target decibel value according to the first decibel value and the second decibel value; obtaining a corresponding current angle according to the target decibel value, and taking the corresponding current angle as an adjustment current angle.

[0165] In an embodiment, the updating module 30 is further configured to obtain a preset torque value and a preset rotating speed set; obtain an updated torque according to the preset torque value and the initial torque; obtain a preset rotating speed according to the preset rotating speed set; and obtain an updated rotating speed according to the preset rotating speed.

[0166] In an embodiment, the updating module 30 is further configured to obtain an updated torque current value and an updated torque current angle according to the initial rotating speed, the updated torque, the adjustment current value and the adjustment current angle; and obtain a target current value and a target current angle according to the updated rotating speed, the updated torque, the adjustment current value and the adjustment current angle.

[0167] In an embodiment, the generating module 40 is further configured to obtain a sound wave frequency and an amplitude according to the target current value, the target current angle and the computer host; obtain sound data according to the sound wave frequency, the amplitude and the noise vibration roughness acquisition device; obtain a noise analysis result according to the sound data and the noise vibration roughness host; and perform warning sound verification according to the noise analysis result.

[0168] In an embodiment, the adjusting module 20 is further configured to obtain a third decibel value according to the initial rotating speed, the initial torque and the adjustment current angle; obtain a corresponding current value according to the third decibel value, and take the corresponding current value as the adjustment current value.

[0169] In an embodiment, the detecting module 10 is further configured to control the dynamometer to set a motor rotating speed according to the calibration instruction, and obtain an initial rotating speed; and control the dynamometer host to set a motor torque according to the calibration instruction, and obtain an initial torque.

[0170] The present application provides a vehicle warning sound generation device, which comprises at least one processor and a memory in communication connection with the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the vehicle warning sound generation method in the above-mentioned embodiment one.

[0171] Reference will be made to the following description of embodiments Figure 7, which shows a schematic structural diagram of a vehicle warning sound generating device suitable for implementing embodiments of the present application. The vehicle warning sound generating device in the embodiments of the present application may include, but is not limited to, mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. Figure 7 The vehicle warning sound generating device shown is merely an example and should not limit the functions and scope of use of the embodiments of the present application.

[0172] like Figure 7 As shown, the vehicle warning sound generating device may include a processing device 1001 (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes based on programs stored in a read-only memory (ROM) 1002 or programs loaded from a storage device 1003 into a random access memory (RAM) 1004. RAM 1004 also stores various programs and data required for the operation of the vehicle warning sound generating device. Processing device 1001, ROM 1002, and RAM 1004 are interconnected via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to I / O interface 1006: input devices 1007 including, for example, a touchscreen, touchpad, keyboard, mouse, image sensor, microphone, accelerometer, gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), speaker, vibrator, etc.; storage device 1003 including, for example, a magnetic tape, hard disk, etc.; and communication device 1009. The communication device 1009 can allow the vehicle warning sound generating device to communicate with other devices wirelessly or by wire to exchange data. Although the figure shows a vehicle warning sound generating device with various systems, it should be understood that it is not required to implement or have all of the systems shown. More or fewer systems may be implemented or have alternatively.

[0173] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product comprising a computer program carried on a computer readable medium, the computer program containing program codes for executing the method shown in the flowchart. In such embodiments, the computer program can be downloaded and installed from a network through a communication device, or installed from the storage device 1003, or installed from the ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiments disclosed in the present application are executed.

[0174] The vehicle warning sound generation device provided by the present application adopts the vehicle warning sound generation method in the above-mentioned embodiments, which can solve the technical problem of ensuring that the electric vehicle can effectively warn pedestrians when driving at low speed, and reducing the complexity and cost of implementation. Compared with the prior art, the vehicle warning sound generation device provided by the present application has the same beneficial effects as the vehicle warning sound generation method provided by the above-mentioned embodiments, and other technical features in the vehicle warning sound generation device are the same as the features disclosed in the previous embodiment method, which will not be repeated here.

[0175] It should be understood that various parts of the present application can be realized by hardware, software, firmware or a combination thereof. In the description of the above-mentioned embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0176] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

[0177] The present application provides a computer readable storage medium having stored thereon computer readable program instructions (i.e. computer program) for executing the vehicle warning sound generation method in the above-mentioned embodiments.

[0178] The computer readable storage medium provided in the present application may, for example, be a U disk, but is not limited to an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, system, or device, or any combination thereof. More specific examples of the computer readable storage medium may include, but are not limited to, an electrical connection having one or more conductive wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present embodiment, the computer readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the computer readable storage medium can be transmitted by any suitable medium, including but not limited to an electrical wire, an optical cable, an RF (Radio Frequency), and the like, or any suitable combination thereof.

[0179] The above computer readable storage medium may be included in the vehicle warning sound generation device, or may exist separately without being assembled into the vehicle warning sound generation device.

[0180] The above computer readable storage medium carries one or more programs, which, when executed by the vehicle warning sound generation device, cause the vehicle warning sound generation device to: when a calibration instruction is detected, obtain an initial speed and an initial torque according to the simulation test bench, and obtain an initial current value and an initial current angle according to the computer host;

[0181] Obtain an adjusted current angle according to the initial speed, the initial torque, the initial current value, and the initial current angle;

[0182] Obtain an adjusted current value according to the initial speed, the initial torque, and the adjusted current angle;

[0183] Obtain an updated speed and an updated torque, and obtain a target current value and a target current angle according to the initial speed, the updated torque, the updated speed, the adjusted current value, and the adjusted current angle;

[0184] Generate a vehicle warning sound according to the target current value and the target current angle.

[0185] Computer program code for carrying out operations of the present application can be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code can execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection can be made to an external computer (for example, through the Internet using an Internet Service Provider).

[0186] The flow diagrams and the block diagrams in the drawings are illustrations of architectures, functionalities, and operations of possible implementations of systems, methods, and computer program products according to various embodiments of the present application. In this regard, each block in the flow diagrams or block diagrams can represent a module, a segment, or a portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that in some alternative implementations, the functions noted in the blocks can occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently or the blocks may

[0187] The modules involved in the embodiments of the present application can be implemented in the form of software or in the form of hardware. In some cases, the name of the module does not constitute a limitation on the module itself.

[0188] The readable storage medium provided by the present application is a computer readable storage medium, which stores computer readable program instructions (i.e., a computer program) for executing the vehicle warning sound generation method described above, and can solve the technical problem of ensuring that an electric vehicle can effectively warn pedestrians when driving at low speed, and reducing the complexity and cost of actual installation. Compared with the prior art, the computer readable storage medium provided by the present application has the same beneficial effects as the vehicle warning sound generation method provided by the above-mentioned embodiments, and will not be described here.

[0189] The application also provides a computer program product comprising a computer program which, when executed by a processor, implements the steps of the vehicle warning sound generation method as described above.

[0190] The computer program product provided by the application can solve the technical problem of ensuring that the electric vehicle can effectively warn pedestrians when driving at low speed, and reducing the complexity and cost of implementation. Compared with the prior art, the beneficial effects of the computer program product provided by the application are the same as those of the vehicle warning sound generation method provided by the above-mentioned embodiments, and are not described here.

[0191] The above only describes some embodiments of the application, and does not limit the patent scope of the application. Any equivalent structural transformation made by using the content of the application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the application.

Claims

1. A method for generating a vehicle warning sound, characterized in that: The vehicle warning sound generation method is applied to a simulation test bench, the simulation test bench including a computer, and the method includes: When a calibration instruction is detected, an initial rotational speed and an initial torque are obtained according to the simulation test bench, and an initial current value and an initial current angle are obtained according to the computer host computer; Obtaining an adjusted current angle according to the initial speed, the initial torque, the initial current value, and the initial current angle; Obtaining an adjusted current value according to the initial rotational speed, the initial torque, and the adjusted current angle; Acquire an updated speed and an updated torque, and obtain a target current value and a target current angle according to the initial speed, the updated torque, the updated speed, the adjusted current value, and the adjusted current angle; A vehicle warning sound is generated according to the target current value and the target current angle.

2. The method according to claim 1, wherein The step of adjusting the current angle according to the initial speed, the initial torque, the initial current value, and the initial current angle comprises: Obtaining a first decibel value according to the initial speed, the initial torque, the initial current value, and the initial current angle; Obtaining an increased current angle according to the initial current angle and the preset current angle; obtaining a second decibel value according to the initial speed, the initial torque, the initial current value, and the increased current angle; Obtaining a target decibel value according to the first decibel value and the second decibel value; A corresponding current angle is obtained according to the target decibel value, and the corresponding current angle is used as the adjustment current angle.

3. The method according to claim 1, wherein The steps to obtain updated speed and updated torque include: Obtaining a preset torque value and a preset speed set; Obtaining an updated torque according to the preset torque value and the initial torque; Obtaining a preset speed according to the preset speed set; An updated rotational speed is obtained according to the preset rotational speed.

4. The method according to claim 1, wherein The step of obtaining a target current value and a target current angle according to the initial speed, the updated torque, the updated speed, the adjusted current value, and the adjusted current angle comprises: Obtaining an updated torque current value and an updated torque current angle according to the initial speed, the updated torque, the adjusted current value, and the adjusted current angle; A target current value and a target current angle are obtained according to the updated rotational speed, the updated torque, the adjusted current value, and the adjusted current angle.

5. The method according to claim 1, wherein The simulation test bench further includes a noise, vibration and roughness acquisition device and a noise, vibration and roughness host computer, wherein the noise, vibration and roughness acquisition device and the noise, vibration and roughness host computer are connected via a low-voltage line; After the step of generating a vehicle warning sound according to the target current value and the target current angle, the method further includes: Obtaining the frequency and amplitude of the sound wave according to the target current value, the target current angle, and the computer; Obtaining sound data according to the sound wave frequency, the amplitude, and the noise vibration roughness acquisition device; Obtaining a noise analysis result based on the sound data and the noise vibration roughness host computer; The warning sound verification is performed according to the noise analysis result.

6. The method according to claim 1, wherein The step of obtaining the adjusted current value according to the initial speed, the initial torque and the adjusted current angle includes: obtaining a third decibel value according to the initial speed, the initial torque, and the adjusted current angle; A corresponding current value is obtained according to the third decibel value, and the corresponding current value is used as the adjusted current value.

7. The method according to claim 1, wherein The simulation test bench further comprises a dynamometer and a dynamometer host computer, wherein the dynamometer and the dynamometer host computer are connected via a low-voltage line; When a calibration instruction is detected, the steps of obtaining an initial speed and an initial torque according to the simulation test bench include: Controlling the dynamometer to set the motor speed according to the calibration instruction to obtain an initial speed; The dynamometer host computer is controlled to set the motor torque according to the calibration instruction to obtain the initial torque.

8. A vehicle warning sound generating device, characterized in that: The device comprises: The detection module is used to obtain the initial speed and initial torque according to the simulation test bench when the calibration instruction is detected, and to obtain the initial current value and initial current angle according to the computer host computer; an adjustment module, configured to obtain an adjusted current angle according to the initial rotational speed, the initial torque, the initial current value, and the initial current angle; The adjustment module is further configured to obtain an adjustment current value according to the initial rotational speed, the initial torque, and the adjustment current angle; an updating module, configured to obtain an updated speed and an updated torque, and obtain a target current value and a target current angle according to the initial speed, the updated torque, the updated speed, the adjusted current value, and the adjusted current angle; A generating module is used to generate a vehicle warning sound according to the target current value and the target current angle.

9. A vehicle warning sound generating device, characterized in that: The device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the vehicle warning sound generation method according to any one of claims 1 to 7.

10. A storage medium, characterized in that: The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the vehicle warning sound generation method according to any one of claims 1 to 7 are implemented.

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