Automobile dynamic atmosphere lamp system

Abstract

The invention discloses an automobile dynamic atmosphere lamp system which comprises a central domain control unit, an audio collecting and processing module, an LIN transceiver and a dynamic atmosphere lamp strip, the audio collecting and processing module is integrated in the central domain control unit, and the central domain control unit is connected with the dynamic atmosphere lamp strip through the LIN transceiver. According to the invention, the control strategy and the control algorithm of the atmosphere lamp are integrated to the central domain controller, ISCM or other intermediate processing controllers are omitted, and the central domain controller integrates all algorithms and strategies to directly send the RGB and brightness of the atmosphere lamp to the lamp holder, so that intermediate links are reduced; the cost of a middle connecting wire harness and information forwarding of an intermediary controller are omitted, the cost is saved, and the complexity of the system is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of automobile atmosphere lamps, and in particular to an automobile dynamic atmosphere lamp system. Background Art

[0002] The traditional automotive ambient light control system divides the dynamic control system into multiple parts including central domain control, ISCM system device and ambient light head, which increases the hardware cost, wiring harness cost and integration complexity. Therefore, it is necessary to reduce the intermediate environment and optimize the complexity of the system. Summary of the invention

[0003] The purpose of the present invention is to provide a vehicle dynamic atmosphere lighting system to solve the problems in the prior art.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a car dynamic atmosphere light system, comprising a central domain control unit, an audio acquisition and processing module, a LIN transceiver and a dynamic atmosphere light strip, wherein the audio acquisition and processing module is integrated in the central domain control unit, and the central domain control unit is connected to the dynamic atmosphere light strip via the LIN transceiver.

[0005] Preferably, it also includes a control switch and a human-machine interface, and the control switch is integrated in the human-machine interface.

[0006] Preferably, the dynamic atmosphere light strip includes brightness and color control, breathing light effect control, flow effect control and rhythm effect control coordinated with music.

[0007] Preferably, the audio acquisition and processing module collects the phonetic element data output by the audio system, decodes it through an FFT algorithm to obtain a spectrum signal and an amplitude signal, and combines the music tags provided by the audio APP to output a real-time control curve of the atmosphere light to the dynamic atmosphere light through an atmosphere light rhythm algorithm.

[0008] Preferably, the FFT algorithm is obtained by improving the discrete Fourier transform algorithm according to the odd, even, imaginary and real characteristics of the discrete Fourier transform; Fourier transform of a non-periodic continuous signal x(t):

[0009] The formula calculates the spectrum of the continuous signal x(t), while for the actual system, the discrete signal x(nT) is obtained by digital sampling of the continuous signal; the spectrum of the signal x(t) is calculated using x(nT); The discrete Fourier transform of a finite-length discrete signal x(n), n=0,1,2…N-1 is defined as:

[0010] From the above formula, the discrete Fourier transform requires N 2Multiplication operations, N 2 When N is large, a large amount of calculation is required to complete the calculation. However, according to the symmetry and periodicity of WN, the DFT is decomposed into two new DFT points of N / 2, and the DFT operation is reduced to half of the principle, that is, (N / 2)2+(N / 2)2 = N / 2. This principle is continued to decompose. N / 2 is further decomposed into N / 4 discrete Fourier transforms. For the discrete Fourier transform of N=2m, which is decomposed into 2-point discrete Fourier transforms, the amount of calculation is reduced to (N / 2)log2N multiplications and Nlog2N additions. Decompose x(n) into the sum of two new sequences x1(n) and x2(n):

[0011] x1(n) and x2(n) are the even and odd sequences of the original sequence respectively:

[0012] Where X1(k) and X2(k) are divided into N / 2 point DFTs corresponding to x1(n) and x2(n); X1(k) and X2(k) are both periodic to N / 2, so X(k) can be expressed as:

[0013] Preferably, PCM converts the time domain signal into the frequency domain through the FFT algorithm to obtain a set of data corresponding to the frequency, which includes the frequency value and the corresponding amplitude or decibel value; wherein the frequency, i.e., the pitch, reflects the melody, and the decibel reflects the loudness of the sound; After the FFT algorithm, the pitch is estimated based on the spectrum peak distribution and fundamental frequency, and then the melody characteristics of the music are obtained to compensate the color and brightness of the ambient light; Data reception: The data obtained by PCM decoding and FFT algorithm will be output to the rhythm algorithm through the Gaussian window; Rhythm algorithm: The rhythm algorithm sets the smoothing factor, smoothing radius and filter factor to ensure smooth transition of the rhythm; Smoothing factor: set to 0.1, the decay rate is 10% when the spectrum drops; Smoothing radius: set to 20, indicating that the smoothing range is 20hz; Filter factor: set to 0.85, which means 85% of the spectrum data will be filtered; The amplitude signal generates the rhythm of the music after passing through the maximum / minimum and maximum / minimum judgment algorithms; the amplitude data is obtained after processing the original audio signal, reflecting the intensity of the sound. The algorithm normalizes the original amplitude data to a value of 0-100, and the atmosphere light corresponds to the brightness of the time light strip 0-100% based on 0-100; The frequency domain signal and the identified pitch / melody features are used to compensate the color and brightness of the ambient light to reflect different melody visual effects. The speed of the music will be compensated to the color and brightness of the ambient light through the algorithm. If the beat speed of the rhythm is fast, the principle of compensating the brightness is to increase the brightness and the color is to increase the proportion of warm colors; otherwise, the brightness will be reduced and the color will increase the proportion of cool colors. The decibel signal is used to identify the intensity of the current music, thereby compensating for the overall brightness and darkness of the ambient light; The algorithm outputs of the above three modules are fused and smoothed to generate the main brightness curve and main color curve of the external light. Then, the dynamic color and brightness value of each LED are set according to the user's mode selection (or the melody characteristics of the music itself). For the light strip configuration of the LIN node, the main color / brightness, dynamic mode, and synchronization signal are set.

[0014] Preferably, the atmosphere light rhythm algorithm: the original audio data PCM signal will first pass through the FFT algorithm, and this process will add smoothing factors, smoothing radius and filter factors to filter out noise to obtain effective amplitude and spectrum signals that will reflect the color and brightness of the atmosphere light in the future; these signals will then be judged by maximum and minimum values, and music rhythm will be generated, and the color selection and brightness information of the atmosphere light will be determined in combination with music tags to generate a time domain curve of the main brightness of the atmosphere light; as the music plays, the curve will change in real time, and then according to the atmosphere light mode selected by the user, the light strip will change brightness and color with the rhythm.

[0015] Preferably, the dynamic atmosphere light strip controls the corresponding LED lamp beads to the target brightness and color according to the main brightness and color data of the atmosphere light, as well as the dynamic mode and synchronization signal received in real time from the central domain control rhythm unit.

[0016] Preferably, single color single brightness mode: the ambient light switches color according to the change of rhythm, and adjusts the brightness according to the change of amplitude, and the entire light strip will be one color at the same time; Flowing water mode: The ambient light switches colors according to the change of rhythm, and switches the brightness of the light strip in a flowing mode according to the change of amplitude; Spectrum mode: The light strip is divided into 7 different color blocks according to the spectrum distribution obtained by FFT. The brightness of the light strip is adjusted with the change of music rhythm and amplitude. Spring mode: The entire strip of ambient light will light up from left to right or from right to left in sequence as the rhythm and amplitude of the music change.

[0017] Compared with the prior art, the beneficial effects of the present invention are: integrating the control strategy and control algorithm of the atmosphere light into the central domain control, eliminating the ISCM or other intermediate processing controllers, and the central domain control integrates all the algorithms and strategies to directly send the RGB and brightness specifications of the atmosphere light to the lamp head, reducing the intermediate links, omitting the cost of the intermediate connection harness and the information forwarding of the intermediary controller, saving costs and reducing the complexity of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the present invention; Figure 2 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention.

[0020] See also Figure 1-2 In an embodiment of the present invention, a car dynamic atmosphere light system includes a central domain control unit, an audio acquisition and processing module, a LIN transceiver and a dynamic atmosphere light strip, wherein the audio acquisition and processing module is integrated in the central domain control unit, and the central domain control unit is connected to the dynamic atmosphere light strip through the LIN transceiver.

[0021] Preferably, it also includes a control switch and a human-machine interface, and the control switch is integrated in the human-machine interface.

[0022] Preferably, the dynamic atmosphere light strip includes brightness and color control, breathing light effect control, flow effect control and rhythm effect control coordinated with music.

[0023] Preferably, the audio acquisition and processing module collects the phonetic element data output by the audio system, decodes it through an FFT algorithm to obtain a spectrum signal and an amplitude signal, and combines the music tags provided by the audio APP to output a real-time control curve of the atmosphere light to the dynamic atmosphere light through an atmosphere light rhythm algorithm.

[0024] Preferably, the FFT algorithm is obtained by improving the discrete Fourier transform algorithm according to the odd, even, imaginary and real characteristics of the discrete Fourier transform; Fourier transform of a non-periodic continuous signal x(t):

[0025] The formula calculates the spectrum of the continuous signal x(t), while for the actual system, the discrete signal x(nT) is obtained by digital sampling of the continuous signal; the spectrum of the signal x(t) is calculated using x(nT); The discrete Fourier transform of a finite-length discrete signal x(n), n=0,1,2…N-1 is defined as:

[0026] From the above formula, the discrete Fourier transform requires N 2 Multiplication operations, N 2 When N is large, a large amount of calculation is required to complete the calculation. However, according to the symmetry and periodicity of WN, the DFT is decomposed into two new DFT points of N / 2, and the DFT operation is reduced to half of the principle, that is, (N / 2)2+(N / 2)2 = N / 2. This principle is continued to decompose. N / 2 is further decomposed into N / 4 discrete Fourier transforms. For the discrete Fourier transform of N=2m, which is decomposed into 2-point discrete Fourier transforms, the amount of calculation is reduced to (N / 2)log2N multiplications and Nlog2N additions. Decompose x(n) into the sum of two new sequences x1(n) and x2(n):

[0027] x1(n) and x2(n) are the even and odd sequences of the original sequence respectively:

[0028] Where X1(k) and X2(k) are divided into N / 2 point DFTs corresponding to x1(n) and x2(n); X1(k) and X2(k) are both periodic to N / 2, so X(k) can be expressed as:

[0029] This formula is called the butterfly formula. After m-1 decompositions, the N-point DFT is finally decomposed into two-point DFT:

[0030] The principle of the FFT algorithm is to achieve large-scale transformations through many small, easier-to-perform transformations, which reduces the computational requirements, reduces the time complexity of the algorithm, and increases the computing speed.

[0031] PCM converts the time domain signal to the frequency domain through FFT, and obtains a set of corresponding frequency data, which includes the frequency value and the corresponding amplitude or decibel value. The frequency, i.e. the pitch, reflects the melody, and the decibel reflects the loudness of the sound.

[0032] Preferably, PCM converts the time domain signal into the frequency domain through the FFT algorithm to obtain a set of data corresponding to the frequency, which includes the frequency value and the corresponding amplitude or decibel value; wherein the frequency, i.e., the pitch, reflects the melody, and the decibel reflects the loudness of the sound; After the FFT algorithm, the pitch is estimated based on the spectrum peak distribution and fundamental frequency, and then the melody characteristics of the music are obtained to compensate the color and brightness of the ambient light; Data reception: The data obtained by PCM decoding and FFT algorithm will be output to the rhythm algorithm through the Gaussian window; Rhythm algorithm: The rhythm algorithm sets the smoothing factor, smoothing radius and filter factor to ensure smooth transition of the rhythm; Smoothing factor: set to 0.1, the decay rate is 10% when the spectrum drops; Smoothing radius: set to 20, indicating that the smoothing range is 20hz; Filter factor: set to 0.85, which means that 85% of the spectrum data will be filtered; The amplitude signal generates the rhythm of the music after passing through the maximum / minimum and maximum / minimum judgment algorithms; the amplitude data is obtained after processing the original audio signal, reflecting the intensity of the sound. The algorithm normalizes the original amplitude data to a value of 0-100, and the atmosphere light corresponds to the brightness of the time light strip 0-100% based on 0-100; The amplitude signal generates the rhythm of the music after passing through the maximum / minimum and maximum / minimum judgment algorithms; the amplitude data will be obtained after processing the original audio signal, reflecting the intensity of the sound. The algorithm will normalize the original amplitude data and normalize it to a value of 0-100, and the atmosphere light will correspond to the brightness of the time light strip 0-100% based on 0-100. However, due to the actual effect, the brightness of the light strip will not be 0 or 100%. Therefore, we will uniformly define the amplitude below 20 as 20% brightness, and the brightness above 85% as 85% (it can be adjusted according to the actual lighting effect and human eye perception data). This is the maximum and minimum value algorithm.

[0033] The frequency domain signal and the identified pitch / melody features are used to compensate the color and brightness of the ambient light to reflect different melody visual effects. The speed of the music will be compensated to the color and brightness of the ambient light through the algorithm. If the beat speed of the rhythm is fast, the principle of compensating the brightness is to increase the brightness and the color is to increase the proportion of warm colors; otherwise, the brightness will be reduced and the color will increase the proportion of cool colors. The decibel signal is used to identify the intensity of the current music, thereby compensating for the overall brightness and darkness of the ambient light; The algorithm outputs of the above three modules are fused and smoothed to generate the main brightness curve and main color curve of the external light. Then, the dynamic color and brightness value of each LED are set according to the user's mode selection (or the melody characteristics of the music itself). For the light strip configuration of the LIN node, the main color / brightness, dynamic mode, and synchronization signal are set.

[0034] Preferably, the atmosphere light rhythm algorithm: the original audio data PCM signal will first pass through the FFT algorithm, and this process will add smoothing factors, smoothing radius and filter factors to filter out noise to obtain effective amplitude and spectrum signals that will reflect the color and brightness of the atmosphere light in the future; these signals will then be judged by maximum and minimum values, and music rhythm will be generated, and the color selection and brightness information of the atmosphere light will be determined in combination with music tags to generate a time domain curve of the main brightness of the atmosphere light; as the music plays, the curve will change in real time, and then according to the atmosphere light mode selected by the user, the light strip will change brightness and color with the rhythm.

[0035] Preferably, the dynamic atmosphere light strip controls the corresponding LED lamp beads to the target brightness and color according to the main brightness and color data of the atmosphere light, as well as the dynamic mode and synchronization signal received in real time from the central domain control rhythm unit.

[0036] Preferably, single color single brightness mode: the ambient light switches color according to the change of rhythm, and adjusts the brightness according to the change of amplitude, and the entire light strip will be one color at the same time; Flowing water mode: The ambient light switches colors according to the change of rhythm, and switches the brightness of the light strip in a flowing mode according to the change of amplitude; Spectrum mode: The light strip is divided into 7 different color blocks according to the spectrum distribution obtained by FFT. The brightness of the light strip is adjusted with the change of music rhythm and amplitude. Spring mode: The entire strip of ambient light will light up from left to right or from right to left in sequence as the rhythm and amplitude of the music change.

[0037] The atmosphere lighting includes normal brightness and color control, breathing light effect, flow effect and rhythmic effect coordinated with music.

[0038] The control switch of the ambient light is integrated in the HMI. Users can control the turning on and off of the ambient light through the control buttons on the screen inside the car, and select the corresponding ambient light effect.

[0039] The audio processing part is also integrated in the central control unit in the car. It collects the audio metadata output by the audio system, decodes it through the FFT algorithm to obtain the spectrum signal and amplitude signal, and combines the music tags provided by the audio APP to output the real-time control curve of the ambient light to the lamp head through the ambient light rhythm algorithm.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A vehicle dynamic atmosphere lighting system, characterized in that: It includes a central domain control unit, an audio acquisition and processing module, a LIN transceiver and a dynamic atmosphere light strip. The audio acquisition and processing module is integrated in the central domain control unit, and the central domain control unit is connected to the dynamic atmosphere light strip through the LIN transceiver.

2. The automotive dynamic atmosphere lighting system according to claim 1, characterized in that: It also includes a control switch and a human-machine interface, wherein the control switch is integrated in the human-machine interface.

3. The automotive dynamic atmosphere lighting system according to claim 1, characterized in that: The dynamic atmosphere light strip includes brightness and color control, breathing light effect control, flow effect control, and rhythm effect control coordinated with music.

4. The automotive dynamic atmosphere lighting system according to claim 1, characterized in that: The audio acquisition and processing module collects the phonetic element data output by the audio system, decodes it through the FFT algorithm to obtain the spectrum signal and amplitude signal, and combines the music tags provided by the audio APP to output the real-time control curve of the atmosphere light to the dynamic atmosphere light through the atmosphere light rhythm algorithm.

5. The automotive dynamic atmosphere lighting system according to claim 4, characterized in that: The FFT algorithm is obtained by improving the discrete Fourier transform algorithm according to the odd, even, imaginary and real characteristics of the discrete Fourier transform; Fourier transform of a non-periodic continuous signal x(t): The formula calculates the spectrum of the continuous signal x(t), while for the actual system, the continuous signal is digitally sampled to obtain the discrete signal x(nT); x(nT) is used to calculate the spectrum of the signal x(t); The discrete Fourier transform of a finite-length discrete signal x(n), n=0,1,2…N-1 is defined as: From the above formula, the discrete Fourier transform requires N 2 Multiplication operations, N 2 When N is large, a large amount of calculation is required to complete the calculation. However, according to the symmetry and periodicity of WN, the DFT is decomposed into two new DFT points of N / 2, and the DFT operation is reduced to half of the principle, that is, (N / 2)2+(N / 2)2 = N / 2. This principle continues to decompose. N / 2 is further decomposed into N / 4 discrete Fourier transforms. For the discrete Fourier transform of N=2m, which is decomposed into 2-point discrete Fourier transforms, the amount of calculation is reduced to (N / 2)log2N multiplications and Nlog2N additions. Decompose x(n) into the sum of two new sequences x1(n) and x2(n): x1(n) and x2(n) are the even and odd sequences of the original sequence respectively: Where X1(k) and X2(k) are divided into N / 2 point DFTs corresponding to x1(n) and x2(n); X1(k) and X2(k) are both periodic to N / 2, so X(k) can be expressed as:

6. The automotive dynamic atmosphere lighting system according to claim 5, characterized in that: PCM converts the time domain signal into the frequency domain through the FFT algorithm, and obtains a set of corresponding frequency data, which includes the frequency value and the corresponding amplitude or decibel value; the frequency, i.e. the pitch, reflects the melody, and the decibel reflects the loudness of the sound; After the FFT algorithm, the pitch is estimated based on the spectrum peak distribution and fundamental frequency, and then the melody characteristics of the music are obtained to compensate the color and brightness of the ambient light; Data reception: Data obtained by PCM decoding and FFT algorithm is output to the rhythm algorithm through Gaussian window; Rhythm algorithm: The rhythm algorithm sets the smoothing factor, smoothing radius and filter factor to ensure smooth transition of the rhythm; Smoothing factor: set to 0.1, the decay rate is 10% when the spectrum drops; Smoothing radius: set to 20, indicating that the smoothing range is 20hz; Filter factor: set to 0.85, which means that 85% of the spectrum data will be filtered; The amplitude signal generates the rhythm of the music after passing through the maximum / minimum and maximum / minimum judgment algorithms; the amplitude data is obtained after processing the original audio signal, reflecting the intensity of the sound. The algorithm normalizes the original amplitude data to a value of 0-100, and the atmosphere light corresponds to the brightness of the time light strip 0-100% based on 0-100; The frequency domain signal and the identified pitch / melody features are used to compensate the color and brightness of the ambient light to reflect different melody visual effects. The speed of the music will be compensated to the color and brightness of the ambient light through the algorithm. If the beat speed of the rhythm is fast, the principle of compensating the brightness is to increase the brightness and the color is to increase the proportion of warm colors; otherwise, the brightness will be reduced and the color will increase the proportion of cool colors. The decibel signal is used to identify the intensity of the current music, thereby compensating for the overall brightness and darkness of the ambient light; The algorithm outputs of the above three modules are fused and smoothed to generate the main brightness curve and main color curve of the exterior light. Then, the dynamic color and brightness value of each LED are set according to the user's mode selection or the melody characteristics of the music itself. For the light strip configuration of the LIN node, the main color / brightness, dynamic mode, and synchronization signal are set.

7. The automotive dynamic atmosphere lighting system according to claim 6, characterized in that: The described atmosphere light rhythm algorithm: the original audio data PCM signal will first pass through the FFT algorithm, during which the smoothing factor, smoothing radius and filter factor will be added to filter out the noise to obtain the effective amplitude and spectrum signals that will reflect the color and brightness of the atmosphere light in the future; these signals will then be judged by the maximum and minimum values, and the music rhythm will be generated, and the color selection and brightness information of the atmosphere light will be determined in combination with the music tags to generate a time domain curve of the main brightness of the atmosphere light; as the music plays, the curve will change in real time, and then according to the atmosphere light mode selected by the user, the light strip will change the brightness and color with the rhythm.

8. The automotive dynamic atmosphere lighting system according to claim 1, characterized in that: The dynamic atmosphere light strip controls the corresponding LED lamp beads to the target brightness and color according to the main brightness and color data of the atmosphere light, as well as the dynamic mode and synchronization signal received in real time from the central domain control rhythm unit.

9. The automotive dynamic atmosphere lighting system according to claim 8, characterized in that: Single color single brightness mode: The ambient light switches colors according to the change of rhythm, and adjusts the brightness according to the change of amplitude. The entire light strip will be one color at the same time; Flowing water mode: The ambient light switches colors according to the change of rhythm, and switches the brightness of the light strip in a flowing mode according to the change of amplitude; Spectrum mode: The light strip is divided into 7 different color blocks according to the spectrum distribution obtained by FFT. The brightness of the light strip is adjusted with the change of music rhythm and amplitude. Spring mode: The entire strip of ambient light will light up from left to right or from right to left in sequence as the rhythm and amplitude of the music change.

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