CN216561459U

CN216561459U - Sound wave simulation control system for vehicle

Info

Publication number: CN216561459U
Application number: CN202123117905.1U
Authority: CN
Inventors: 刘跃雷
Original assignee: No7 Electronic Technology Tianjin Co ltd
Current assignee: No7 Electronic Technology Tianjin Co ltd
Priority date: 2021-12-07
Filing date: 2021-12-07
Publication date: 2022-05-17
Anticipated expiration: 2031-12-07

Abstract

The utility model provides a sound wave simulation control system for a vehicle, which comprises an engine sound wave simulation unit, a Bluetooth processing unit, a digital-to-analog converter, a power amplification unit, a preposed sound box, a bass sound box and an interface circuit, wherein the engine sound wave simulation unit is connected with the Bluetooth processing unit; the Bluetooth processing unit is used for transmitting audio signals and data signals with the mobile terminal, amplifying the audio signals and transmitting the audio signals to the front sound box and the bass sound box for playing, and upgrading programs and audio through Bluetooth data transmission functions such as a mobile phone APP; the engine sound wave simulation unit collects the vehicle running state signal through the interface circuit and finishes the sound wave simulation signal, and the sound wave simulation signal is output to the front sound box and the bass sound box to generate engine sound waves after being processed by the Bluetooth processing unit; the utility model can play the sound of the engine sound waves according to the running state signal of the vehicle, thereby increasing more entertainment experience for users, playing music, having prominent stereo sound effect, and leading drivers to have better surrounding sense of the sound field and more comfortable sound.

Description

Sound wave simulation control system for vehicle

Technical Field

The utility model relates to the technical field of sound processing of electronic products, in particular to a sound wave simulation control system for a vehicle.

Background

Along with the development of science and technology and the continuous improvement of people's living standard, the vehicle receives more and more user's favor as the travel instrument of an environmental protection, the vehicle is when satisfying people's trip convenience, also increasing new function and satisfying constantly, for example have music player or radio, people can broadcast music or listen to the broadcast when using the vehicle to go on a journey, current music player generally is directly on being connected to the certain position of vehicle through the hardware, when broadcasting music, the tone quality of broadcast is dull, and broadcast music mode is single, also there is not the music instant music broadcast function with vehicle motion state linkage in the prior art, lack recreational, can't satisfy more recreational demands of user.

SUMMERY OF THE UTILITY MODEL

The object of the present invention is to solve at least one of the technical drawbacks mentioned.

Therefore, one object of the present invention is to provide a sound wave analog control system for a vehicle, which includes an engine sound wave analog unit, a bluetooth processing unit, a digital-to-analog converter, a power amplifier unit, a front speaker, a bass speaker and an interface circuit; the interface circuit is connected with the engine sound wave simulation unit, the engine sound wave simulation unit is connected with the Bluetooth processing unit, the Bluetooth processing unit is connected with the digital-to-analog converter, the digital-to-analog converter is connected with the power amplification unit, and the power amplification unit is respectively connected with the prepositive sound box and the bass sound box;

the engine sound wave simulation unit is used for acquiring a vehicle state signal, converting the vehicle state signal into an engine sound wave audio signal and outputting the engine sound wave audio signal to the Bluetooth processing unit;

the Bluetooth processing unit is used for transmitting audio signals and data signals with the mobile terminal.

The power amplification unit is used for amplifying the audio signals transmitted by the Bluetooth processing unit and outputting the audio signals to the preposed loudspeaker box and the bass loudspeaker box for playing.

Preferably, the vehicle state signal comprises a vehicle speed signal, a brake signal, and an accelerator pedal state signal; the engine sound wave simulation unit is used for acquiring vehicle state signals and converting the vehicle state signals into engine sound wave audio signals, and specifically comprises the following steps:

and step S21, calculating and simulating the running state parameter information of the engine according to the collected vehicle state signals.

And step S22, judging whether the engine operation state parameter information simulated by the first calculation in the step S21 is the same as the engine operation state parameter information simulated by the second calculation in the step S21, if so, outputting the engine operation state parameter information simulated by the first calculation, and if not, outputting the engine operation state parameter information simulated by the second calculation.

Step S23: judging whether the brake is effective or not according to the brake signal, if so, calculating and simulating the engine rotating speed according to the accelerator pedal state signal to output an engine rotating speed curve and an acceleration parameter; and if the vehicle speed signal is invalid, calculating a simulation output engine speed curve and an acceleration parameter according to the vehicle speed signal.

Step S24: and judging whether the acceleration parameter in the step S23 is zero, if so, calculating the corresponding engine sound wave audio signal output according to the engine speed curve, and if not, adjusting the engine speed curve according to the accelerator pedal state signal and the acceleration parameter and calculating the corresponding engine sound wave audio signal output.

In any of the above schemes, preferably, adjusting the engine speed curve according to the accelerator pedal state signal and the acceleration parameter and calculating the corresponding engine sound wave audio signal specifically include:

step S241, judging whether the acceleration parameter is larger than zero, if so, adjusting the medium and low frequency parameters in the engine sound wave audio signal according to the accelerator pedal state signal and the acceleration parameter; and if the acceleration parameter is smaller than zero, adjusting the medium-high frequency parameter in the engine sound wave audio signal according to the accelerator pedal state signal and the acceleration parameter.

In any of the above schemes, preferably, the bluetooth processing unit includes a bluetooth processing chip, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, a fifteenth capacitor, a sixteenth capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a first diode, a first inductor, a first interface chip, a first buffer chip, and a bluetooth processing chip power terminal pin, the bluetooth processing chip power terminal pin is connected to one end of the first capacitor and one end of the second capacitor, the bluetooth processing chip voltage input terminal pin is connected to one end of the third capacitor and one end of the fourth capacitor, a voltage output end pin of the Bluetooth processing chip is connected with one end of a fifth capacitor, a communication pin of the Bluetooth processing chip is connected with a cathode of a first diode, one end of a sixth capacitor and one end of an eighth capacitor, the other end of the sixth capacitor is connected with one end of a seventh capacitor, a radio frequency end pin of the Bluetooth processing chip is connected with one end of a ninth capacitor, one end of a tenth capacitor and one end of a first inductor, a radio frequency power supply end pin of the Bluetooth processing chip is connected with one end of an eleventh capacitor, a crystal oscillator input end pin of the Bluetooth processing chip is connected with one end of a first resistor, one end of a thirteenth capacitor and an output end pin of a crystal oscillator, a crystal oscillator output end pin of the Bluetooth processing chip is connected with one end of a fourteenth capacitor, the other end of the first resistor and an input end pin of the crystal oscillator, a first transmission end pin of the Bluetooth processing chip is connected with an anode of a first interface chip through a third resistor, a second transmission terminal pin of the Bluetooth processing chip is connected with a negative electrode of the first interface chip through a second resistor, a third transmission terminal pin of the Bluetooth processing chip is connected with a signal input terminal pin of the first cache chip through a sixth resistor, a fourth transmission terminal pin of the Bluetooth processing chip is connected with a clock terminal pin of the first cache chip through a fifth resistor, a fifth transmission terminal pin of the Bluetooth processing chip is connected with an enable terminal pin of the first cache chip and one end of a seventh resistor, a sixth transmission terminal pin of the Bluetooth processing chip is connected with one end of a fourth resistor, the other end of the fourth resistor is connected with one end of an eighth resistor, the other end of the eighth resistor is connected with a signal output terminal pin of the first cache chip, a power supply terminal pin of the first cache chip is connected with one end of a twelfth capacitor, a switch holding terminal pin of the first cache chip is connected with one end of a ninth resistor, a left sound channel signal output terminal pin of the Bluetooth processing chip is connected with one end of a tenth resistor, the other end of the tenth resistor is connected with one end of a fifteenth capacitor, a pin of a right sound channel signal output end of the Bluetooth processing chip is connected with one end of an eleventh resistor, and the other end of the eleventh resistor is connected with one end of a sixteenth capacitor.

In any of the above schemes, preferably, the engine sound wave simulation unit includes a micro-control chip, a seventeenth capacitor, an eighteenth capacitor, a nineteenth capacitor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a second interface chip, and a second cache chip, a power pin of the micro-control chip is connected to one end of the seventeenth capacitor, one end of the eighteenth capacitor, and one end of the nineteenth capacitor, a first transmission pin of the micro-control chip is connected to a signal transmission pin of the second interface chip through the twelfth resistor, a second transmission pin of the micro-control chip is connected to a clock pin of the second interface chip through the thirteenth resistor, a third transmission pin of the micro-control chip is connected to a clock pin of the second cache chip through the fifteenth resistor, a fifth transmission pin of the micro-control chip is connected to a signal output terminal of the second cache chip through the sixteenth resistor, and a fourth transmission end pin of the micro-control chip is connected with a signal input end pin of the second cache chip through a fourteenth resistor.

In any of the above schemes, preferably, the power amplifier unit includes a front speaker power amplifier unit and a bass speaker power amplifier unit, the front speaker power amplifier unit is connected with the front speaker, and the bass speaker power amplifier unit is connected with the bass speaker; the prepositive loudspeaker box power amplification unit comprises a power amplification chip, a second diode, a third diode, a fourth diode, a fifth diode, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth capacitor, a twenty-first capacitor, a first polarity capacitor, a left sound channel circuit and a right sound channel circuit, wherein the power amplification chip is respectively connected with the left sound channel circuit and the right sound channel circuit, a power amplification end pin of the power amplification chip is connected with one end of the seventeenth resistor, one end of the eighteenth resistor, the anode of the second diode and the anode of the third diode, a mute end pin of the power amplification chip is connected with one end of the nineteenth resistor, the anode of the fourth diode and the anode of the fifth diode, and a power supply end pin of the power amplification chip is connected with one end of the twentieth capacitor, one end of the twenty-first capacitor and the anode of the first polarity capacitor.

In any of the above aspects, preferably, the front speaker includes two midrange speakers, and the bass speaker includes two midrange speakers.

In any of the above schemes, preferably, the right channel circuit includes a twentieth resistor, a twenty-first resistor, a twenty-second resistor, a twenty-third resistor, a twenty-second capacitor, a twenty-third capacitor, a twenty-fourth capacitor, a twenty-fifth capacitor, a twenty-sixth capacitor, a twenty-seventh capacitor, a twenty-eighth capacitor, a twenty-ninth capacitor, a thirty-third capacitor, a thirty-eleventh capacitor, a second inductor, and a third inductor, the power amplifier chip right channel positive terminal pin is connected to one end of the twenty-second capacitor, the other end of the twenty-second capacitor is connected to one end of the second inductor, the other end of the second inductor is connected to one end of the twenty-fifth capacitor, one end of the twenty-sixth capacitor, one end of the twentieth resistor, and the positive terminal of the mid-high pitch loudspeaker, the other end of the twenty-seventh resistor is connected to one end of the twenty-seventh capacitor, the chip right channel positive terminal pin is connected to the other end of the twenty-second capacitor and one end of the twenty-fourth capacitor, the twenty-fourth capacitor other end is grounded through a twenty-third resistor, a power amplifier chip right sound channel negative end pin is connected with one end of a twenty-third capacitor, the other end of the twenty-third capacitor is connected with one end of a third inductor, the other end of the third inductor is connected with one end of a twenty-ninth capacitor, one end of a thirty capacitor, one end of a twenty-first resistor and the negative electrode of a middle and high pitch loudspeaker, the other end of the twenty-first resistor is connected with one end of a twenty-eighth capacitor, a power amplifier chip right sound channel negative output end pin is connected with the other end of the twenty-third capacitor and one end of a thirty-first capacitor, and the other end of the thirty-first capacitor is grounded through a twenty-twelfth resistor.

In any of the above aspects, it is preferable that the left channel circuit and the right channel circuit have the same configuration.

In any of the above schemes, preferably, the bass loudspeaker box power amplifier unit has the same structure as the front loudspeaker box power amplifier unit.

In any of the above schemes, preferably, the micro control chip is a model STM32F446RCT6 chip.

In any of the above schemes, preferably, the bluetooth processing chip is a BP1048 model chip.

In any of the above schemes, the power amplifier chip is preferably a chip of model TPA3118D 2.

Compared with the prior art, the utility model has the advantages and beneficial effects that:

1. the utility model comprises a Bluetooth music playing function, can be connected by Bluetooth multimedia equipment such as a mobile phone and the like, realizes the upgrading of program audio and music playing through the Bluetooth data transmission function such as a mobile phone APP and the like, an interface circuit receives and processes the running state of the whole vehicle and transmits the running state to an engine sound wave simulation unit, the engine sound wave simulation unit completes sound wave simulation signals, the signals are amplified through a digital-to-analog conversion and power amplification unit and then output to a front-mounted sound box and a bass sound box to generate engine sound wave sound after being processed by a Bluetooth processing unit, and a user can know the running state of the engine sound in time through the sound wave sound, thereby increasing the interest and the safety.

2. The design of leading audio amplifier and bass audio amplifier can fully restore the musical effect, realizes encircleing and feels, and the three-dimensional sound effect of music is outstanding, can make the driver have better sound field encircleing and feels, has promoted user experience greatly.

3. The engine sound wave simulation unit can realize the collection of vehicle state signals, vehicle speed, accelerator pedal state signals, brake signals, power output and other signals by the whole vehicle collection module; the method comprises the steps of calculating an engine state information system, rotating speed, output power and the like of the current integral simulation in real time through vehicle signals, calculating vibration and sound states of an engine at the current moment in real time, converting the vibration and sound states into corresponding engine sound wave audio parameter curves, calculating an engine sound wave audio digital signal in real time by calling the engine sound wave audio parameters, playing engine sound wave sounds, simulating the engine sound waves vividly, closely following the running state of the whole vehicle through sound waves, fully embodying the control intention of a driver, integrating the sounds and the whole vehicle into a whole body, and greatly improving entertainment experience of a user.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a block diagram of a sound wave simulation control system of a mobile vehicle according to an embodiment of the present invention;

fig. 2 is a control flow chart of a sound wave simulation control system of a mobile vehicle according to an embodiment of the present invention;

fig. 3 is a schematic circuit diagram of a bluetooth processing unit shown in fig. 1 of a sound wave simulation control system of a moving vehicle according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a sound wave simulation control system of a mobile vehicle according to an embodiment of the present invention, the engine sound wave simulation unit shown in fig. 1;

fig. 5 is a schematic circuit diagram of a power amplifier unit of a front speaker in the power amplifier unit shown in fig. 1 of a sound wave analog control system of a mobile vehicle according to an embodiment of the present invention.

Wherein the reference numbers: 1-an engine sound wave simulation unit; 2-an interface circuit; 3-a bluetooth processing unit; 4-a digital-to-analog converter; 5-a power amplifier unit; 6-front sound box; 7-bass sound box; 8-left channel circuitry; 9-right channel circuit.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

As shown in fig. 1, a sound wave analog control system for a vehicle according to an embodiment of the present invention includes an engine sound wave analog unit 1, a bluetooth processing unit 3, a digital-to-analog converter 4, a power amplifier unit 5, a front speaker 6, a bass speaker 7, and an interface circuit 2; the interface circuit 2 is connected with the engine sound wave simulation unit 1, the engine sound wave simulation unit 1 is connected with the Bluetooth processing unit 3, the Bluetooth processing unit 3 is connected with the digital-to-analog converter 4, the digital-to-analog converter 4 is connected with the power amplification unit 5, and the power amplification unit 5 is respectively connected with the front speaker 6 and the bass speaker 7.

The engine sound wave simulation unit 1 is used for collecting vehicle state signals, converting the vehicle state signals into engine sound wave audio signals and outputting the engine sound wave audio signals to the Bluetooth processing unit 3.

The Bluetooth processing unit 3 is used for transmitting audio signals and data signals with the mobile terminal; and meanwhile, the received engine sound wave audio signal can be processed.

The power amplifier unit 5 is used for amplifying the audio signal transmitted by the bluetooth processing unit 3 or the engine sound wave audio signal and outputting the audio signal to the front speaker 6 and the bass speaker 7 for playing.

The engine sound wave simulation unit 1 collects vehicle state signals through the interface circuit 2.

The digital-to-analog converter 4 is used to convert the digital signal of the audio into an analog signal of the audio.

The sound wave simulation control system for the vehicle comprises a Bluetooth processing unit 3, a front sound box 6, a bass sound box 7 and a mobile terminal, wherein the Bluetooth processing unit is used for transmitting audio signals and data signals to the mobile terminal, amplifying the audio signals and transmitting the audio signals to the front sound box 6 and the bass sound box 7 for playing, and upgrading programs and audio by using Bluetooth data transmission functions such as a mobile phone APP and the like; the interface circuit 2 receives the running state of the whole vehicle, transmits the running state to the engine sound wave simulation unit 1, completes sound wave simulation signals, and outputs the signals to the preposed sound box 6 and the bass sound box 7 to generate engine sound waves after the signals are amplified by the digital-to-analog conversion and power amplification unit 5 after being processed by the Bluetooth processing unit 3; the utility model can play the sound of the engine sound waves according to the running state signal of the vehicle, thereby increasing more entertainment experience for users, playing music, having prominent stereo sound effect, and leading drivers to have better surrounding sense of the sound field and more comfortable sound.

The vehicle in the embodiment of the present invention refers to an electric vehicle or a non-electric vehicle, such as an electric car, a hybrid car, a fuel car, a motorcycle, and the like.

Further, the vehicle state signal comprises a vehicle speed signal, a brake signal and an accelerator pedal state signal; the engine sound wave simulation unit 1 is used for acquiring vehicle state signals and converting the vehicle state signals into engine sound wave audio signals, and specifically comprises the following steps:

Further, adjusting an engine speed curve according to the accelerator pedal state signal and the acceleration parameter and calculating a corresponding engine sound wave audio signal specifically comprise:

The audio frequency range is divided into four frequency bands, i.e. frequencies in the audio: the low frequency range frequency is 30HZ-150 HZ; the frequency of the medium and low frequency band is 150HZ-500 HZ; the middle-high frequency band frequency is 500HZ-5000 HZ; the high frequency band frequency is 5000HZ-20000HZ, and the medium and low frequency parameters refer to the frequency band frequency of 150HZ-500HZ in the engine sound wave audio signal; the medium-high frequency parameter refers to frequency band frequency of 500HZ-5000 HZ; the accelerator pedal state is a degree of stepping on an accelerator pedal by a driver, and the acceleration obtained by the vehicle varies depending on the degree of stepping on the accelerator pedal.

Specifically, as shown in fig. 3, the bluetooth processing unit 3 includes a bluetooth processing chip U, a first capacitor C, a second capacitor C, a third capacitor C, a fourth capacitor C, a fifth capacitor C, a sixth capacitor C, a seventh capacitor C, an eighth capacitor C, a ninth capacitor C, a tenth capacitor C, an eleventh capacitor C, a twelfth capacitor C, a thirteenth capacitor C, a fourteenth capacitor C, a fifteenth capacitor C, a sixteenth capacitor C, a first resistor R, a second resistor R, a third resistor R, a fourth resistor R, a fifth resistor R, a sixth resistor R, a seventh resistor R, an eighth resistor R, a ninth resistor R, a tenth resistor R, an eleventh resistor R \ a first diode D, a first inductor FB, a first interface chip CON, a first cache chip U, a bluetooth processing chip power terminal pin AVDD connected to one end of the first capacitor C and one end of the second capacitor C, a voltage input terminal pin LODIN of the Bluetooth processing chip is connected with one end of a third capacitor C21 and one end of a fourth capacitor C57, a voltage output terminal pin of the Bluetooth processing chip is connected with one end of a fifth capacitor C67, a communication pin RFIO of the Bluetooth processing chip is connected with the cathode of a first diode D9, one end of a sixth capacitor C69 and one end of an eighth capacitor C72, the other end of the sixth capacitor C69 is connected with one end of a seventh capacitor C71, a radio frequency terminal pin RF3V3_ TR of the Bluetooth processing chip is connected with one end of a ninth capacitor C74, one end of a tenth capacitor C75 and one end of a first inductor FB2, a radio frequency terminal pin RFVDD12 of the Bluetooth processing chip is connected with one end of an eleventh capacitor C76, a crystal oscillator input terminal pin XO 24M _ XI of the Bluetooth processing chip is connected with one end of a first resistor R70, one end of a thirteenth capacitor C81 and an output terminal XAL1, and a crystal oscillator output terminal XO 24M _ 79 of the Bluetooth processing chip is connected with one end of a fourteenth capacitor C79, The other end of the first resistor R70 is connected to an input terminal pin of a crystal oscillator XAL1, a first transmission terminal pin GPIO _ a17 of the bluetooth processing chip is connected to the positive terminal of the first interface chip CON3 through a third resistor R76, a second transmission terminal pin GPIO _ a18 of the bluetooth processing chip is connected to the negative terminal of the first interface chip CON3 through a second resistor R75, a third transmission terminal pin GPIO _ a20 of the bluetooth processing chip is connected to a signal input terminal pin of the first cache chip U7 through a sixth resistor R66, a fourth transmission terminal pin GPIO _ a21 of the bluetooth processing chip is connected to a clock terminal pin of the first cache chip U7 through a fifth resistor R65, a fifth transmission terminal pin GPIO _ a22 of the bluetooth processing chip is connected to an enable terminal pin of the first cache chip U7 and one end of a seventh R69, the sixth transmission terminal pin GPIO _ a23 of the bluetooth processing chip is connected to one end of a fourth resistor R61, and the other end of the fourth resistor R61 is connected to an eighth resistor R73, the other end of the eighth resistor R73 is connected with a signal output terminal pin of the first cache chip U7, a power supply terminal pin of the first cache chip U7 is connected with one end of a twelfth capacitor C77, a switch holding terminal pin of the first cache chip U7 is connected with one end of a ninth resistor R74, a left channel signal output terminal pin DAC _ L of the Bluetooth processing chip is connected with one end of a tenth resistor R54, the other end of the tenth resistor R54 is connected with one end of a fifteenth capacitor C15, a right channel signal output terminal pin DAC _ R of the Bluetooth processing chip is connected with one end of an eleventh resistor R55, and the other end of the eleventh resistor R55 is connected with one end of a sixteenth capacitor C16.

The first cache chip U7 stores the audio signals, so that the Bluetooth processing chip can conveniently inquire and read; bluetooth processing unit 3 is arranged in with remove between the end transmit audio signal and data signal to broadcast in leading audio amplifier 6 and bass speaker 7 unit with audio signal transmission, realize the upgrading of procedure and audio frequency through bluetooth data transmission functions such as cell-phone APP.

Further, as shown in fig. 4, the engine sound wave simulation unit includes a micro-control chip U1, a seventeenth capacitor C10, an eighteenth capacitor C62, a nineteenth capacitor C11, a twelfth resistor R2, a thirteenth resistor R4, a fourteenth resistor R5, a fifteenth resistor R7, a sixteenth resistor R14, a second interface chip CON1, and a second cache chip U2, wherein a power supply terminal pin VDDA of the micro-control chip is connected to one end of the seventeenth capacitor C10, one end of the eighteenth capacitor C62, and one end of the nineteenth capacitor C11, a first transmission terminal pin PA13 of the micro-control chip is connected to a signal transmission terminal SDWIO of the second interface chip through the twelfth resistor R2, a second transmission terminal pin lk 14 of the micro-control chip is connected to a clock terminal pin of the second interface chip SDWIO through the thirteenth resistor R4, a third transmission terminal pin PB3 of the micro-control chip is connected to a clock terminal pin PB 68 through the fifteenth cache resistor R7, and a fifth cache chip U2, and a fifth cache chip pin PB 23 are connected to a signal transmission terminal pin of the second interface chip 466 of the micro-chip The fourth transmission terminal pin PB4 of the micro control chip is connected to the signal input terminal pin of the second cache chip U2 through the fourteenth resistor R5.

The engine sound wave simulation unit 1 receives the vehicle state signal, calculates the output of a 16bit engine sound wave audio signal according to the vehicle state information in real time, and plays the signal through a preposed sound box and a bass sound box; meanwhile, the sound volume and the frequency spectrum components in the sound waves can be adjusted, so that various timbres of the engine such as low depth, howling and idling can be expressed, and the sound wave characteristics of the engine can be completely expressed.

Specifically, as shown in fig. 5, the power amplifier unit 5 includes a front speaker power amplifier unit and a bass speaker power amplifier unit, the front speaker power amplifier unit is connected to the front speaker 6, and the bass speaker power amplifier unit is connected to the bass speaker 7; the power amplification unit 5 of the front speaker comprises a power amplification chip U6, a second diode D2, a third diode D3, a fourth diode D4, a fifth diode D5, a seventeenth resistor R34, an eighteenth resistor R36, a nineteenth resistor R41, a twentieth capacitor C23, a twenty-first capacitor C24 and a first polarity capacitor C25, the left sound channel circuit 8, the right sound channel circuit 9, power amplifier chip U6 is connected with left sound channel circuit 8 and right sound channel circuit 9 respectively, power amplifier chip power amplifier end pin SD is connected with the one end of seventeenth resistance R34, the one end of eighteenth resistance R36, the positive pole of second diode D2 and the positive pole of third diode D3, power amplifier chip silence end pin MUTE is connected with the one end of nineteenth resistance R41, the positive pole of fourth diode D4 and the positive pole of fifth diode D5, power amplifier chip power supply end pin is connected with twentieth electric capacity C23 one end, twenty-first electric capacity C24 one end and the positive pole of first polarity electric capacity C25.

Further, the front speaker 6 includes two middle and high speakers, and the bass speaker 7 includes two middle and high speakers; the medium and high sound loudspeaker refers to a loudspeaker with the frequency range of 500Hz-20KHz, and the medium and low sound loudspeaker refers to a loudspeaker with the frequency range of 20HZ-5000 HZ.

Specifically, the right channel circuit 8 includes a twentieth resistor R33, a twenty-first resistor R35, a twenty-second resistor R37, a twenty-third resistor R32, a twenty-second capacitor C27, a twenty-third capacitor C32, a twenty-fourth capacitor C22, a twenty-fifth capacitor C26, a twenty-sixth capacitor C28, a twenty-seventh capacitor C29, a twenty-eighth capacitor C30, a twenty-ninth capacitor C31, a thirty capacitor C34, a thirty capacitor C35, a second inductor L1, and a third inductor L2, the positive end pin BSPR of the right channel of the power amplifier chip is connected to one end of the twenty-second capacitor C27, the other end of the twenty-second capacitor C27 is connected to one end of the second inductor L1, the other end of the second inductor L1 is connected to one end of the twenty-fifth capacitor C26, one end of the twenty-sixth capacitor C28, one end of the twenty-first resistor R33, and the positive end of the tweeter, the other end of the twenty-fourth resistor R6855 is connected to one end of the twenty-fifth capacitor C29, the power amplifier chip right sound channel positive output end pin OUTPR is connected with the other end of a twenty-second capacitor C27 and one end of a twenty-fourth capacitor C22, the other end of the twenty-fourth capacitor C22 is grounded through a twenty-thirteen resistor R32, the power amplifier chip right sound channel negative end pin BSNR is connected with one end of a twenty-third capacitor C32, the other end of the twenty-third capacitor C32 is connected with one end of a third inductor L2, the other end of the third inductor L2 is connected with one end of a twenty-ninth capacitor C31, one end of a thirty capacitor C34, one end of a twenty-first resistor R35 and the negative electrode of a middle and high-pitch loudspeaker, the other end of a twenty-first resistor R35 is connected with one end of a twenty-eighth capacitor C30, the power amplifier chip right sound channel negative output end pin OUTPR is connected with the other end of the twenty-third capacitor C32 and one end of a thirty capacitor C35, and the other end of the thirty-first capacitor C35 is grounded through a twelfth resistor R37.

The power amplifier unit 5 can filter noise through the left sound channel circuit 8 and the right sound channel circuit 9 in order to amplify audio signals, avoids the interference of electric current to the audio, and the broadcast effect is better.

Optionally, the left channel circuit 8 and the right channel circuit 9 have the same structure; the left channel circuit 8 and the right channel circuit are each connected to a mid-high speaker.

Optionally, the bass loudspeaker box power amplifier unit has the same structure as the preposed loudspeaker box power amplifier unit.

Optionally, the micro control chip is an STM32F446RCT6 model chip.

Optionally, the bluetooth processing chip U5 adopts a BP1048 model chip.

Optionally, the power amplifier chip is a chip of model TPA3118D 2.

Optionally, the first cache chip U7 is a W25Q16JVSNIQ model chip.

Optionally, the second cache chip U2 is a W25Q16JVSNIQ model chip.

As shown in fig. 2, the overall work flow of the embodiment of the present invention is as follows:

and step S0, starting a system and starting a sound wave simulation control system for the vehicle.

Step S1, judging whether playing audio music, that is, whether playing audio music, if playing audio music, then entering step S2, if not, then entering step S31.

Step S2, starting the Bluetooth processing unit to connect with the mobile terminal and receiving the audio signal, and then the process goes to step S21.

And step S21, amplifying the signal by the digital-to-analog conversion and power amplification unit and outputting the amplified signal to the prepositive sound box and the bass sound box to realize music playing or engine sound wave sound playing.

Step S31, starting the engine sound wave simulation unit, and calculating and simulating the running state parameter information of the engine according to the collected vehicle state signal; the method comprises the steps of collecting vehicle state signals including a vehicle speed signal, a brake state signal, an accelerator pedal state signal, a power signal, an output power parameter signal and the like, calculating and simulating engine running state parameter information, wherein the engine running state parameter information includes rotating speed information, load capacity information and the like.

Step S32, judging whether the engine operation state parameter information simulated by the first calculation in the step S31 is the same as the engine operation state parameter information simulated by the second calculation in the step S31, if so, outputting the engine operation state parameter information simulated by the first calculation, and if not, outputting the engine operation state parameter information simulated by the second calculation; when the engine state parameter information simulated by the first calculation needs to be compared with the engine state parameter information simulated by the second calculation, if the engine state parameter information simulated by the first calculation is the same as the engine state parameter information simulated by the second calculation, and the running state of the engine is not changed, the engine state parameter information simulated by the first calculation is directly output; if the engine state parameter information simulated by the first calculation is different from the engine state parameter information simulated by the second calculation, which indicates that the engine running state has changed, the engine running state parameter information simulated by the second calculation, namely the latest engine running state parameter information in the current state, is output.

Step S33: judging whether the brake is effective or not according to the brake signal, if so, calculating and simulating the engine rotating speed according to the accelerator pedal state signal to output an engine rotating speed curve and an acceleration parameter; if the vehicle speed signal is invalid, calculating a simulation output engine speed curve and an acceleration parameter according to the vehicle speed signal; the brake is effective, namely the vehicle speed is zero, the engine is in an idle state at the moment, and an engine speed curve and acceleration parameters are calculated and simulated according to the state signal of the accelerator pedal; and if the brake is invalid, namely the vehicle speed is not zero, and the engine is in a non-idle state at the moment, filtering the current parameter of the vehicle, filtering the parameter of the accelerator pedal, and calculating and simulating a rotating speed curve and an acceleration parameter of the engine according to the vehicle speed signal.

Step S34: and judging whether the acceleration parameter in the step S33 is zero, if so, calculating the corresponding engine sound wave audio signal output according to the engine speed curve, and if not, adjusting the engine speed curve according to the accelerator pedal state signal and the acceleration parameter and calculating the corresponding engine sound wave audio signal output.

The method comprises the following steps of adjusting an engine rotating speed curve according to an accelerator pedal state signal and an acceleration parameter and calculating a corresponding engine sound wave audio signal output:

step S341, judging whether the acceleration parameter is larger than zero, if so, adjusting the medium and low frequency parameters in the engine sound wave audio signal according to the accelerator pedal state signal and the acceleration parameter; and if the acceleration parameter is smaller than zero, adjusting the medium-high frequency parameter in the engine sound wave audio signal according to the accelerator pedal state signal and the acceleration parameter.

And step S35, outputting the engine sound wave audio signal.

And step S36, the Bluetooth processing unit receives and processes the engine sound wave audio signal, and then the step S21 is skipped to realize the playing of the engine sound wave sound.

The embodiment of the utility model has the following beneficial effects:

1. the stereo music has outstanding sound effect and sound restoration effect, so that a driver can have better surrounding sense of the sound field, and the sound is heard comfortably.

2. The engine sound wave simulation is lifelike, and the sound wave closely follows whole car running state, fully embodies driver's control intention, and sound and whole car can be muddy an organic whole, promote user's amusement experience and feel.

3. The mobile terminal is convenient to use, a user can realize sound playing, pause, playing of a next song, mute switch control and the like by connecting the mobile terminal with the Bluetooth processing unit, and can control to switch to engine sound wave sound at any time, so that more entertainment experience is brought to the user.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

It will be understood by those skilled in the art that the utility model includes any combination of the elements of the foregoing description and the detailed description as well as those illustrated in the drawings, which are meant to be space-limited and not intended to constitute a part of the specification in any way whatsoever, the combination being such that the description is not intended to be exhaustive. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and that those skilled in the art may make variations, modifications, substitutions and alterations within the scope of the present invention without departing from the spirit and scope of the present invention. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A sound wave simulation control system for a vehicle, characterized by: the system comprises an engine sound wave simulation unit, a Bluetooth processing unit, a digital-to-analog converter, a power amplification unit, a preposed sound box, a bass sound box and an interface circuit; the interface circuit is connected with the engine sound wave simulation unit, the engine sound wave simulation unit is connected with the Bluetooth processing unit, the Bluetooth processing unit is connected with the digital-to-analog converter, the digital-to-analog converter is connected with the power amplification unit, and the power amplification unit is respectively connected with the front sound box and the bass sound box; the engine sound wave simulation unit is used for acquiring a vehicle state signal, converting the vehicle state signal into an engine sound wave audio signal and outputting the engine sound wave audio signal to the Bluetooth processing unit; the engine sound wave simulation unit comprises a micro-control chip, a seventeenth capacitor, an eighteenth capacitor, a nineteenth capacitor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a second interface chip and a second cache chip, wherein a power supply pin of the micro-control chip is connected with one end of the seventeenth capacitor, one end of the eighteenth capacitor and one end of the nineteenth capacitor, a first transmission pin of the micro-control chip is connected with a signal transmission pin of the second interface chip through the twelfth resistor, a second transmission pin of the micro-control chip is connected with a clock terminal pin of the second interface chip through the thirteenth resistor, a third transmission pin of the micro-control chip is connected with a clock terminal pin of the second cache chip through the fifteenth resistor, a fifth transmission pin of the micro-control chip is connected with a signal output terminal pin of the second cache chip through the sixteenth resistor, and a fourth transmission end pin of the micro control chip is connected with a signal input end pin of the second cache chip through the fourteenth resistor.

2. A sound wave simulation control system for a vehicle according to claim 1, wherein: the vehicle state signals comprise a vehicle speed signal, a brake signal and an accelerator pedal state signal.

3. A sound wave simulation control system for a vehicle according to claim 1, wherein: the Bluetooth processing unit comprises a Bluetooth processing chip, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, a fifteenth capacitor, a sixteenth capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a first diode, a first inductor, a first interface chip, a first cache chip, and a Bluetooth processing chip power terminal pin connected with one end of the first capacitor and one end of the second capacitor, the Bluetooth processing chip voltage input terminal pin connected with one end of the third capacitor and one end of the fourth capacitor, a voltage output end pin of the Bluetooth processing chip is connected with one end of the fifth capacitor, a communication pin of the Bluetooth processing chip is connected with a cathode of the first diode, one end of the sixth capacitor and one end of the eighth capacitor, the other end of the sixth capacitor is connected with one end of the seventh capacitor, a radio frequency end pin of the Bluetooth processing chip is connected with one end of the ninth capacitor, one end of the tenth capacitor and one end of the first inductor, a radio frequency power end pin of the Bluetooth processing chip is connected with one end of the eleventh capacitor, a crystal oscillator input end pin of the Bluetooth processing chip is connected with one end of the first resistor, one end of the thirteenth capacitor and an output end pin of the crystal oscillator, a crystal oscillator output end pin of the Bluetooth processing chip is connected with one end of the fourteenth capacitor, the other end of the first resistor and an input end pin of the crystal oscillator, the first transmission terminal pin of the Bluetooth processing chip is connected with the positive electrode of the first interface chip through the third resistor, the second transmission terminal pin of the Bluetooth processing chip is connected with the negative electrode of the first interface chip through the second resistor, the third transmission terminal pin of the Bluetooth processing chip is connected with the signal input terminal pin of the first cache chip through the sixth resistor, the fourth transmission terminal pin of the Bluetooth processing chip is connected with the clock terminal pin of the first cache chip through the fifth resistor, the fifth transmission terminal pin of the Bluetooth processing chip is connected with the enable terminal pin of the first cache chip and one end of the seventh resistor, the sixth terminal pin of the Bluetooth processing chip is connected with one end of the fourth resistor, the other end of the fourth resistor is connected with one end of the eighth resistor, and the other end of the eighth resistor is connected with the signal output terminal pin of the first cache chip, a power supply end pin of the first cache chip is connected with one end of the twelfth capacitor, a switch holding end pin of the first cache chip is connected with one end of the ninth resistor, a left channel signal output end pin of the bluetooth processing chip is connected with one end of the tenth resistor, the other end of the tenth resistor is connected with one end of the fifteenth capacitor, a right channel signal output end pin of the bluetooth processing chip is connected with one end of the eleventh resistor, and the other end of the eleventh resistor is connected with one end of the sixteenth capacitor.

4. A sound wave simulation control system for a vehicle according to claim 1, wherein: the power amplification unit comprises a preposed sound box power amplification unit and a bass sound box power amplification unit, the preposed sound box power amplification unit is connected with the preposed sound box, and the bass sound box power amplification unit is connected with the bass sound box; the power amplification unit of the front sound box comprises a power amplification chip, a second diode, a third diode, a fourth diode, a fifth diode, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth capacitor, a twenty-first capacitor, a first polarity capacitor, a left sound channel circuit and a right sound channel circuit, the power amplifier chip is respectively connected with the left sound channel circuit and the right sound channel circuit, a power amplifier end pin of the power amplifier chip is connected with one end of the seventeenth resistor, one end of the eighteenth resistor, the anode of the second diode and the anode of the third diode, the pin of the mute end of the power amplifier chip is connected with one end of the nineteenth resistor, the anode of the fourth diode and the anode of the fifth diode, and the power amplifier chip power supply end pin is connected with one end of the twentieth capacitor, one end of the twenty-first capacitor and the anode of the first polarity capacitor.

5. A sound wave simulation control system for a vehicle according to claim 4, wherein: the front sound box comprises two middle and high-pitch loudspeakers, and the bass sound box comprises two middle and low-pitch loudspeakers.

6. A sound wave simulation control system for a vehicle according to claim 5, wherein: the right sound channel circuit comprises a twentieth resistor, a twenty-first resistor, a twenty-second resistor, a twenty-third resistor, a twenty-second capacitor, a twenty-third capacitor, a twenty-fourth capacitor, a twenty-fifth capacitor, a twenty-sixth capacitor, a twenty-seventh capacitor, a twenty-eighth capacitor, a twenty-ninth capacitor, a thirty-third capacitor, a thirty-first capacitor, a second inductor and a third inductor, a right sound channel positive terminal pin of the power amplifier chip is connected with one end of the twenty-second capacitor, the other end of the twenty-second capacitor is connected with one end of the second inductor, the other end of the second inductor is connected with one end of the twenty-fifth capacitor, one end of the twenty-sixth capacitor, one end of the twentieth resistor and the positive terminal of the middle and high-sound loudspeaker, the other end of the twentieth resistor is connected with one end of the twenty-seventh capacitor, a right sound channel positive terminal pin of the power amplifier chip is connected with the other end of the twenty-second capacitor and the other end of the twenty-fourth capacitor The one end of appearance is connected, the twenty-fourth electric capacity other end passes through twenty-third resistance ground connection, power amplifier chip right sound channel negative terminal pin with twenty-third electric capacity one end is connected, the twenty-third electric capacity other end with the one end of third inductance is connected, the other end of third inductance with the one end of twenty-ninth electric capacity the one end of thirty electric capacity the one end of twenty-first electric capacity with the negative pole of well high-pitched loudspeaker is connected, the other end of twenty-first electric capacity with the one end of twenty-eighth electric capacity is connected, power amplifier chip right sound channel negative output terminal pin with the other end of twenty-third electric capacity with the one end of thirty-first electric capacity is connected, the other end of thirty-first electric capacity passes through twenty-second resistance ground connection.

7. A sound wave simulation control system for a vehicle according to claim 6, wherein: the left channel circuit and the right channel circuit have the same structure.

8. A sound wave simulation control system for a vehicle according to claim 7, wherein: the bass sound box power amplifier unit and the preposed sound box power amplifier unit have the same structure.