A driving sensation and sound wave simulation system

Abstract

The present invention provides a driving sensation and sound wave simulation system, comprising a data processing device, a data acquisition device connected to the data processing device, and two actuators; the actuators include an audio player and a vibration exciter; the data processing device is configured to determine whether to turn on a driving simulation function, so as to simulate sensation and sound waves at the same time, and when the driving simulation function is determined to be turned on, the speed signal, the accelerator pedal depth signal, and the acceleration signal are processed to obtain processing results and sent to the actuators respectively. The driving sensation and sound wave simulation system of the present invention adds a vibration exciter on the basis of an audio player, and according to the real-time speed signal, the accelerator pedal depth signal, and the acceleration signal, through the signal processing of a real-time baseband algorithm model, it can achieve real-time and consistent feedback of sound and vibration feedback, with better real-time authenticity, and solve the problem of asynchrony between auditory and tactile feedback.

Description

Technical Field

[0001] The present invention relates to the field of in-vehicle infotainment, and more particularly to a driving sensation and sound wave simulation system. Background Art

[0002] At present, the simulated sound waves of common electric vehicles on the market send sound through the speakers of the entire vehicle to give an auditory experience. In actual daily use, the sound waves can only be received by hearing, and there is a lack of physical effect when driving. Subjectively, the driving experience and the sound are separated.

[0003] Even if the existing technology has a vibration experience solution, its vibration mode is based on the low-frequency signal in the audio, which is converted into a simulated vibration signal through virtual synthesis. Since the vibration signal is not output at the same time as the audio, the existing solution does not generate and respond to the audio signal and the vibration signal at the same time, but must convert it into a vibration signal after obtaining the audio signal, resulting in a poor experience of the entire system. Therefore, its real-time performance is poor, and the auditory and tactile feedback are not synchronized. In addition, because the existing technology's signal is purely virtual synthesis, it cannot change quickly with the real-time situation of the vehicle, resulting in an unrealistic driving experience. Summary of the invention

[0004] The purpose of the present invention is to provide a driving sensation and sound wave simulation system based on a vehicle seat vibration exciter and vehicle audio, so that an electric vehicle can simulate the driving experience of a fuel vehicle.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a driving sensation and sound wave simulation system, comprising a data processing device, at least one data acquisition device connected to the data processing device and two actuators; the actuator comprises an audio player and a vibration exciter; the data processing device is configured to determine whether to turn on a driving simulation function so as to simulate the sensation and sound wave at the same time, and when it is determined that the driving simulation function is turned on, the speed signal, the accelerator pedal depth signal and the acceleration signal are processed to obtain the processing results and send them to the actuators respectively.

[0006] The data acquisition device includes a rotation speed sensor, an accelerator pedal depth sensor and an acceleration sensor. The rotation speed sensor is configured to acquire a rotation speed signal, the accelerator pedal depth sensor is configured to acquire an accelerator pedal depth signal, and the acceleration sensor is configured to acquire an acceleration signal.

[0007] The data processing device is connected to the data acquisition device via a vehicle bus.

[0008] The data processing device is configured to obtain a simulated audio signal using a sound wave simulation function when it is determined that the driving simulation function is turned off, and send the simulated audio signal to the audio player accordingly.

[0009] The data processing device is also configured to determine whether to turn on the power-on and gear-shifting simulation function. When it is determined that the power-on and gear-shifting simulation function is turned on, upon receiving the vehicle's power-on or gear-shifting operation signal, a simulated vibration signal is sent to the vibration exciter accordingly.

[0010] The speed signal, the accelerator pedal depth signal and the acceleration signal are processed, including: selecting the corresponding real-time baseband algorithm model according to the vehicle type, converting the speed signal, the accelerator pedal depth signal and the acceleration signal into a real-time baseband signal through the real-time baseband algorithm model, and splitting the real-time baseband signal into a real-time audio signal and a vibration signal through DSP operation.

[0011] The real-time baseband algorithm model is:

[0012] f(t1)=f0(g(a)·g(b)·g(c)),

[0013] Among them, a is the speed signal, b is the accelerator pedal depth signal, c is the acceleration signal, g(a) is the basic frequency coefficient, g(b) is the basic power coefficient, g(c) is the frequency offset coefficient, f(t1) is the fundamental frequency signal at time t1, and f0 is the relationship function between the fundamental frequency signal and the dynamic coefficients g(a), g(b), and g(c).

[0014] The real-time baseband algorithm model is trained by taking the speed signal a, accelerator pedal depth signal b, and acceleration signal c of fuel vehicles of different models at different times as input parameters and the corresponding baseband signal as output parameters.

[0015] The audio player and the vibration actuator include one of an acoustic transducer and an optical transducer.

[0016] The driving sensation and sound wave simulation system of the present invention adds a vibration exciter on the basis of an audio player, which can convert sound into vibration for the driver, and can simulate the feeling of a fuel vehicle from starting the vehicle engine to refueling and shifting gears; and according to the real-time speed signal, accelerator pedal depth signal, and acceleration signal, through signal processing of a real-time baseband algorithm model, the audio and exciter are controlled to restore the sound of the fuel vehicle's refueling and shifting process and the vibration transmitted to the driver by the engine and gearbox, and real-time and consistent feedback of sound and vibration can be achieved, with better real-time authenticity, and the problem of asynchrony between auditory and tactile feedback in existing known solutions is solved, and can be simultaneously applied to in-vehicle media audio application scenarios and driving sensation needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of a module of a driving sensation and sound wave simulation system according to an embodiment of the present invention.

[0018] Figure 2 The following is a flowchart of the data processing device of the driving sensation and sound wave simulation system according to the present invention. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings and described in detail.

[0020] The present invention provides a driving sensation and sound wave simulation system, such as Figure 1 As shown, the driving sensation and sound wave simulation system includes a data processing device 1, at least one data acquisition device 2 connected to the data processing device 1, and two actuators 3. All data and control signals transmitted between the data processing device 1, the data acquisition device 2 and the actuator 3 are interacted with CAN line and A2B signal line respectively according to real-time performance, and some functions can be upgraded to Ethernet solutions.

[0021] The data acquisition device 2 reads various index information of the vehicle respectively. In this embodiment, the data acquisition device 2 includes a speed sensor 21, an accelerator pedal depth sensor 22 and an acceleration sensor 23. The speed sensor 21 is configured to collect a speed signal, the accelerator pedal depth sensor 22 is configured to collect an accelerator pedal depth signal, and the acceleration sensor 23 is configured to collect an acceleration signal.

[0022] In this embodiment, the data processing device 1 is connected to the data acquisition device 2 via a vehicle bus (such as a CAN line), and a speed signal, an accelerator pedal depth signal and an acceleration signal are obtained from the vehicle bus signal.

[0023] The actuator 3 includes an audio player 31 and a vibration exciter 32 which are arranged in the target sound zone.

[0024] like Figure 2As shown, the data processing device 1 is configured to determine whether to turn on the driving simulation function to simulate the body sensation and the sound wave at the same time, and when it is determined that the driving simulation function is turned on, the speed signal, the accelerator pedal depth signal and the acceleration signal are processed to obtain the processing results and send them to the actuator 3 respectively. The processing results sent to the actuator 3 include the simulated audio signal sent to the audio player 31 and the simulated vibration signal sent to the vibration exciter 32. Otherwise, it is determined that the driving simulation function is turned off, the vibration function is not turned on and the sound wave simulation is retained. At this time, the simulated audio signal is obtained by using the existing sound wave simulation function and sent to the audio player 31 of the actuator 3 accordingly. In addition, the data processing device 1 is also configured to determine whether to turn on the power-on and gear-shifting simulation function. When it is determined that the power-on and gear-shifting simulation function is turned on, when the power-on or gear-shifting operation signal of the vehicle is received, the simulated vibration signal is sent to the vibration exciter 32 accordingly to simulate the feeling of the vehicle body vibration transmitted to the driver when the engine of the fuel vehicle is started.

[0025] The speed signal, accelerator pedal depth signal and acceleration signal are processed, including: selecting the corresponding real-time baseband algorithm model according to the vehicle type, converting the speed signal, accelerator pedal depth signal and acceleration signal into a real-time baseband signal through the real-time baseband algorithm model, and splitting the real-time baseband signal into a real-time audio signal and a vibration signal through DSP operation. The DSP operation itself will judge the real-time baseband signal to split and output it according to the selection rules of the real-time baseband algorithm model (specifically, the high-frequency part obtained by filtering the baseband signal, such as the 20Hz-20KHz frequency band, is an analog audio signal, and the low-frequency part is an analog vibration signal), so that the processing results can be split and transmitted to different actuators 3 to achieve the purpose of consistent response of sound and body sensation.

[0026] Among them, the real-time baseband algorithm model is:

[0027] f(t1)=f0(g(a)·g(b)·g(c)),

[0028] Among them, a is the speed signal, b is the accelerator pedal depth signal, c is the acceleration signal, g(a) is the basic frequency coefficient, g(b) is the basic power coefficient, and g(c) is the frequency offset coefficient. Among them, g(a), g(b), and g(c) need to learn the influence of the three parameters a, b, and c on the final frequency through a large amount of data training, which is the dynamic coefficient in the real-time baseband algorithm model. f(t1) is the baseband signal at time t1, and f0 is the relationship function between the baseband signal and the dynamic coefficients g(a), g(b), and g(c).

[0029] f(t1) is the output parameter of the real-time baseband algorithm model, and a, b, and c are the input parameters of the real-time baseband algorithm model. The real-time baseband algorithm model is trained by taking the speed signal a, accelerator pedal depth signal b, and acceleration signal c of different types of fuel vehicles at different times as input parameters and the corresponding baseband signal as output parameters.

[0030] The fundamental frequency signal is essentially a wide-band vibration signal (the high frequency part is the audio signal, and the low frequency part is the vibration signal). Its value is related to the type of fuel vehicle and is derived through recording or data. For example, the sound waves of various existing sports cars depend on the number of engine cylinders, cylinder diameter, piston stroke, exhaust system solution, etc. The fundamental frequency signal of the vehicle can be obtained through its hardware. Generally speaking, when the cylinder diameter of a fuel vehicle is the same, the greater the power, the higher the frequency of the fundamental frequency signal; when the power of a fuel vehicle is constant, the larger the cylinder diameter, the lower the frequency of the fundamental frequency signal.

[0031] In summary, the driving sensation and sound wave simulation system of the present invention, when the information processing device 1 receives the signal sent by the data acquisition device, coordinates multiple actuators to perform actions simultaneously through the processing of relevant algorithms. When the information processing device 1 receives the demand to turn on the driving simulation function of the vehicle, it will synchronously process the real-time baseband algorithm model and transmit the baseband signal to the actuator 3, such as the vibration exciter 32 of the seat, the whole vehicle audio (i.e., the audio player 31), to drive the actuator 3 to act. The audio player 31 and the vibration exciter 32 of the actuator 3 include but are not limited to one of the types such as acoustic transducer and optical transducer.

[0032] Thus, the driving sensation and sound wave simulation system of the present invention adds a vibration exciter on the basis of an audio player, which can convert sound into vibration and give it to the driver, and can simulate the feeling of a fuel vehicle from starting the vehicle engine to refueling and shifting gears; and according to the real-time speed signal, accelerator pedal depth signal, acceleration signal and other signals through the signal processing of the real-time baseband algorithm model, the sound and exciter are controlled to restore the sound of the refueling and shifting process of the fuel vehicle and the vibration transmitted to the driver by the engine and the gearbox, and the real-time consistent feedback of the sound and vibration feedback is achieved, and the real-time authenticity is better, and the problem of hearing and tactile feedback being out of sync in the existing known solutions is solved, and it can be applied to the in-car media audio application scenario and driving sensation requirements at the same time. That is to say, the vibration signal (i.e., baseband signal) of the driving sensation and sound wave simulation system of the present invention is directly obtained by the driving parameter processing of the vehicle itself, so its feedback effect will be closer to the real feeling. In addition, the driving sensation and sound wave simulation system of the present invention also sends a signal to the vibration exciter through operations such as powering on or shifting gears to simulate the feeling of the body vibration transmitted to the driver when the engine of the fuel vehicle is started, and restores the feeling of the real fuel vehicle engine starting.

[0033] The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. The above embodiment of the present invention can also be modified in various ways. That is, all simple, equivalent changes and modifications made according to the claims and the description of the present invention fall within the scope of protection of the claims of the present invention. The contents not described in detail in the present invention are all conventional technical contents.

Claims

1. A driving sensation and sound wave simulation system, characterized in that: The device comprises a data processing device (1), at least one data acquisition device (2) connected to the data processing device (1), and two actuators (3); the actuators (3) comprise an audio player (31) and a vibration exciter (32); The data processing device (1) is configured to determine whether to turn on the driving simulation function so as to simulate the physical sensation and the sound waves at the same time, and when it is determined that the driving simulation function is turned on, the speed signal, the accelerator pedal depth signal and the acceleration signal are processed to obtain the processing results and send them to the execution mechanism (3) respectively; Process the speed signal, accelerator pedal depth signal and acceleration signal, including: Select the corresponding real-time baseband algorithm model according to the vehicle type, convert the speed signal, accelerator pedal depth signal and acceleration signal into a real-time baseband signal through the real-time baseband algorithm model, split the real-time baseband signal into a real-time audio signal and a vibration signal through DSP operation, and the high-frequency part of the baseband signal filtered is an analog audio signal, and the low-frequency part is an analog vibration signal; The real-time baseband algorithm model is: f(t1)=f0(g(a)·g(b)·g(c)), Among them, a is the speed signal, b is the accelerator pedal depth signal, c is the acceleration signal, g(a) is the basic frequency coefficient, g(b) is the basic power coefficient, g(c) is the frequency offset coefficient, f(t1) is the fundamental frequency signal at time t1, and f0 is the relationship function between the fundamental frequency signal and the dynamic coefficients g(a), g(b), and g(c).

2. The driving sensation and sound wave simulation system according to claim 1, characterized in that: The data acquisition device (2) comprises a rotation speed sensor (21), an accelerator pedal depth sensor (22) and an acceleration sensor (23); the rotation speed sensor (21) is configured to acquire a rotation speed signal, the accelerator pedal depth sensor (22) is configured to acquire an accelerator pedal depth signal, and the acceleration sensor (23) is configured to acquire an acceleration signal.

3. The driving sensation and sound wave simulation system according to claim 1, characterized in that: The data processing device (1) is connected to the data acquisition device (2) via a vehicle bus.

4. The driving sensation and sound wave simulation system according to claim 1, characterized in that: The data processing device (1) is configured to obtain a simulated audio signal using a sound wave simulation function when it is determined that the driving simulation function is turned off, and send the simulated audio signal to the audio player (31) accordingly.

5. The driving sensation and sound wave simulation system according to claim 1, characterized in that: The data processing device (1) is also configured to determine whether to enable the power-on and gear-shifting simulation function. When it is determined that the power-on and gear-shifting simulation function is enabled, upon receiving a vehicle power-on or gear-shifting operation signal, a simulated vibration signal is correspondingly sent to the vibration exciter (32).

6. The driving sensation and sound wave simulation system according to claim 1, characterized in that: The real-time baseband algorithm model is trained by taking the speed signal a, accelerator pedal depth signal b, and acceleration signal c of fuel vehicles of different models at different times as input parameters and the corresponding baseband signal as output parameters.

7. The driving sensation and sound wave simulation system according to claim 1, characterized in that: The audio player (31) and the vibration actuator (32) include one of an acoustic transducer and an optical transducer.

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