• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A method of generating a driving signal for a loudspeaker (14) arranged in a motor vehicle (11), in particular in an exhaust gas system (10) of the vehicle engine or in or out of it of a vehicle passenger compartment, comprises the following steps: a) Provision of a predetermined source signal for an additional sound in the time delay range, which comprises several signal components of different frequencies, b) Analysis of the source signal of the point of view of the phase of the source signal and / or the phase of at least one oscillation present in the source signal, c) Detection of the phase of the motor noise and / or the phase of at least one oscillation present in the motor noise, d) Offset of the phase of the source signal and / or the phase of said at least one oscillation present in the source signal as a function of the detected phase of the motor noise (30) and / or the detected phase of said at least one oscil the present in the motor noise, the phase relationship of each of the oscillations of the source signal relative to each other being retained, and e) Generation of the control signal on the basis of the phase-shifted source signal (24). An exhaust system (10) for an engine, with a loudspeaker (14) and an audio system of a motor vehicle is also shown.
    公开号:FR3046872A1
    申请号:FR1750307
    申请日:2017-01-16
    公开日:2017-07-21
    发明作者:Gerhard Zintel；Martin Unbehaun
    申请人:Faurecia Emissions Control Technologies Germany GmbH；
    IPC主号:
    专利说明:

    The invention relates to a method for generating a driving signal for a loudspeaker arranged in a motor vehicle, an exhaust system for an engine and an audio system for a vehicle cabin. for a loudspeaker arranged in a motor vehicle, in particular in a vehicle engine exhaust system or in or outside a vehicle cabin, an exhaust gas system for an engine with a speaker and audio system for a vehicle interior.
    Engine exhaust systems with a loudspeaker and methods for generating a control signal for this speaker are known. They are used for example in vehicles with combustion engines and serve to adapt the noise emitted by the combustion engine in the environment. It is thus possible to build the sound of an engine in the environment of the vehicle. Here it is possible to achieve both an amplification or a modification of the engine noise that a reduction of the engine noise. It is also known to broadcast engine noise via speakers in the passenger compartment of the vehicle to also build the sound of an engine in the passenger compartment. Generally, the loudspeaker is driven by a control signal so that it generates noises which are similar to that of a motor and which are hereinafter described as additional sound. The additional sound is superimposed in the exhaust system or in the passenger compartment with the engine noise, which can generate the sound of the engine that is emitted in the entourage or is perceived by the passenger.
    The control signal for the loudspeaker is here designed so that the sound of the engine emitted in the entourage or perceived by the passenger is pleasant and adapted to the respective car. As a general rule, one uses as a control signal, depending on the running situation or the current operating parameters of the motor, such as the speed of rotation, a predetermined source signal which is constituted for example by a succession of samples.
    However, it is not possible to make a free sound creation of the engine sound, like the reproduction of measured sounds, nor a free variation of the spectra via the speed of rotation and the load of the motor. It is also impossible to combine these source signals with a noise canceling function that reduces engine noise by phase-locked sound waves generated by the loudspeaker. The aim of the invention is to propose a method for generating a control signal and an exhaust system which, on the basis of a predetermined source signal, allow a free sound creation of the sound of the engine as well as use of the source signal with an anti-noise function of the exhaust system.
    This objective is achieved by a method of generating a driving signal for a loudspeaker arranged in a motor vehicle, in particular in a vehicle engine exhaust system or in or out of a passenger compartment. vehicle, comprising the following steps: a) Providing a predetermined source signal for an additional sound in the time range, which comprises several signal components of different frequencies, b) Analysis of the source signal from the point of view of the phase of the source signal and / or phase of at least one oscillation, c) Detection of the phase of the engine noise and / or the phase of at least one oscillation present in the engine noise, d) Phase shift the source signal and / or the phase of said at least one oscillation present in the source signal as a function of the detected phase of the engine noise and / or the detected phase of said at least one oscillation present in the engine noise, the phase relationship of each of the oscillations of the source signal with respect to each other is retained, and e) Generation of the control signal on the basis of the phase-shifted source signal.
    The notion "predetermined" here means that either the source signal is determined ex-factory or it is generated in a previous step depending on the rolling situation, the driver's wish and / or at least one operating parameter of the motor such as rotational speed or load. In particular, the source signal is not a signal of the current exhaust noise or the like, recorded by a microphone in real time. If the source signal is fixed at the factory, several different source signals are then provided, one of which is respectively chosen according to the running situation, the driver's wish or at least one engine operating parameter such as the speed rotation or load.
    The signal components of the source signal can here for example themselves be oscillations of a given frequency, these being superimposed to form the source signal. Similarly, the signal components may be very short segments of an oscillation of a given frequency, for example with the length of a period, which, arranged one behind the other, thus sequentially, give the source signal. The source signal may also be a mixture of these two methods, for example, a signal component of an oscillation may be superimposed on a source signal consisting of sequential signal components.
    To generate the desired sound of the engine, the invention makes it possible to add to the engine noise an additional sound determined by a predetermined source signal which, in the phase, is adapted to the engine noise without, during the necessary adaptation of the signal. source, the desired additional tone is changed. It is thus possible, by means of the source signal, to influence in a targeted manner the sound of the motor and consequently to freely create the sound of the motor or to emit the source signal in phase opposition to achieve an anti-noise function of the installation of exhaust and / or in or out of the passenger compartment. By synchronizing the phases of the source signal and the motor signal, unforeseen and undesirable beats and deletions can also be avoided when superimposing the desired additional tone and motor noise.
    Preferably, the signal components of the source signal, the oscillation present in the source signal and / or the oscillation present in the motor noise are harmonic oscillations of one of the motor orders (Motorordnung in German), in particular a multiple of the 0.5th order of the motor, so that an adaptation of the desired motor tone occurs with the help of the motor commands, whereby the control of the motor tone and the printing of the motor a noise generated naturally by the engine is improved.
    The 0.5th order of the motor here has the frequency of the half-frequency of rotation of the motor. For this reason, the frequencies of the motor commands increase and, therefore, the frequencies of the signal components or oscillations, respectively, increase correspondingly with the increase of the rotational speed.
    To shift the phases, it is for example determined a preferred motor order, the phase of the oscillation of the source signal corresponding to this order of the preferred motor and the phase of the oscillation of the engine noise corresponding to this order of the preferred motor being adapted to each other, especially at the same level. As a preferred engine order, one can here use the engine order with the highest level, so the order of the noisiest engine. In this way, the superposition of the desired additional tone with the motor noise is further enhanced.
    The phase of oscillation and / or oscillation of the source signal corresponding to the preferred order and the phase of the oscillation of the motor noise corresponding to this order and / or the preferred order can also be shifted by 180 ° with respect to each other. In this way, counter-phase oscillations are generated which cancel each other out and thus reduce the motor noise for the adapted order or in the assembly.
    According to a preferred embodiment, the phase shift of the source signal is carried out in the frequency range, which allows a precise adaptation of the phases. The driving signal can then be generated by an inverse transformation of the out of phase source signal. Of course, it will also take into account the amplitudes of the oscillations present in the signal, which was available at the beginning.
    Preferably, the analysis of the source signal is carried out by means of a transform in the frequency range, in particular by means of a Fourier transform or a Fast Fourier transform (FFT), thanks to which it is possible to perform a fast and reliable phase analysis in the frequency range.
    For example, the phase of the motor noise and / or the phase of said at least one oscillation present in the motor noise is determined in particular by a Fourier transform or by a fast Fourier transform (FFT) and / or by help with sensor data. It is thus possible to quickly and reliably detect the phases of motor noise and oscillations in it. The term "sensor data" must also include data that is generated by the motor control and that does not rely on measurement values of a sensor.
    According to an alternative embodiment, the source signal comprises signal components which consist of a previously recorded signal, whereby the motor noise of a real motor can be used. This can significantly reduce the costs for generating the source signal.
    According to one embodiment of the invention, the source signal comprises synthetically generated signal components, in particular sinusoidal sounds, so that the source signal can vary freely.
    According to another embodiment of the invention, the level of an oscillation present in the source signal is reduced when the frequency ω of this oscillation is close to the frequency ωΗ of an undesirable resonance. This case can occur when the speed of the motor increases, when the frequency ω of said at least one oscillation of the source signal depends on the speed of the motor. With the speed of the motor then also increases the frequency ω of this oscillation, so that its frequency ω, for some engine speeds, is close to or equal to the frequency ωΗ of an undesirable resonance. For example, the unwanted resonance is a vibration of the bodywork or bodywork part of the vehicle in which the exhaust gas system is integrated. In this way, it is possible to prevent unwanted noise development.
    The source signal preferably has an effective value of the voltage of at least 50%, preferably at least 80% of the maximum speaker voltage. Thanks to the corresponding choice and the corresponding design of the source signal, it is possible to generate such effective values which amplify the perceived sound volume of the desired additional sound. Such a design of the predetermined source signal is however only possible by the fact that the phase relationships of the individual signal components of the source signal are maintained between them during the phase shift. The objective is furthermore achieved by an exhaust system for an engine, in particular a motor vehicle, comprising a loudspeaker and a control, the control being provided for implementing the above method and for pilot the speaker with the piloting signal. With the help of such an exhaust system, it is possible to create the sound of the engine emitted in the environment.
    Preferably, the exhaust system has an exhaust line and a microphone, the loudspeaker being in fluid contact with the exhaust line at a point of contact, and the microphone being arranged upstream or downstream of the point of contact, which allows for recording and analysis of engine noise. The terms "upstream" and "downstream" refer here to the flow direction of the exhaust gas. The objective is furthermore achieved by an audio system of a motor vehicle, in particular for a motor vehicle cabin compartment, comprising a loudspeaker and a control, the control being adapted to implement a method mentioned above and to control the loudspeaker with the control signal. With the aid of such an audio system, it is possible to generate in the passenger compartment a desired engine sound.
    Preferably, the audio system is part of a music installation and / or entertainment of the vehicle, which reduces costs since the speakers of the music installation and / or entertainment can also be used together for the audio system. Other features and advantages of the invention result from the description which follows as well as the appended drawings to which reference is made. The drawings show: FIG. 1 a schematic representation of an exhaust system according to the invention which implements the method according to the invention; FIG. 2 a part of a source signal in the time range used in FIG. the method according to the invention, - Figure 3 a representation of the source signal according to Figure 2 in the time range, - Figure 4 an extract of a motor noise in the time range, - Figure 5 an extract of a other motor noise in the time range, - Figure 6 an extract of a source signal according to a second embodiment of the method according to the invention in the time range, - Figure 7 a representation of the source signal according to Figure 6 in the time range, and - Figure 8 a schematic perspective representation of a portion of a motor vehicle with an audio system according to the invention for a passenger compartment. In Figure 1 is shown schematically an installation 10 for a combustion engine. The exhaust system 10 is for example part of a vehicle comprising a combustion engine. The exhaust system 10 has an exhaust line 12 through which the engine exhaust gas (not shown) flows. The flow direction of the exhaust gas is indicated by arrows. The exhaust system 10 furthermore has a loudspeaker 14 which is fluidly connected to the exhaust line 12, for example by a bridge section 16 which opens out at a point of contact 18 in the line d In FIG. 1, the contact point 18 is located inside the exhaust system 10. However, it is also conceivable that the bridge section 16 and the exhaust line 12 extend apart from each other and open into close proximity to one another so that the contact point 18 is itself located only in the direct vicinity of the vehicle. The exhaust system 10 further has a control 20 which is connected to the loudspeaker 14 and which drives the loudspeaker 14 with a control signal. The loudspeaker 14 then transposes this piloting signal into sound waves that are emitted in the bridge section 16.
    Furthermore, in the exhaust line 12, a microphone 22 which is connected to the control 20 can be provided upstream of the point of contact 18, with regard to the flow of the exhaust gas.
    It is also conceivable to provide the microphone 12 downstream of the contact point 18, with respect to the flow of the exhaust gas, as indicated by the dashed lines in FIG. 1. Using the microphone signal 22, the control 20 can analyze the engine noise before the contact point 18.
    Control 20 may be connected to other sensors and / or motor control to receive data therefrom.
    In the embodiment shown, the control 20 is embodied as a separate component, but it can also be integrated in the motor control.
    The control signal for the loudspeaker 14 is generated by the control 20. The starting point of the generation of the control signal is a source signal 24.
    A short temporal extract of a possible embodiment of a source signal 24 in the time delay range is shown in FIG.
    Insofar as one listens to the source signal 24, it already generates a noise that resembles the sound of a motor and which is called additional tone in the context of the invention. The additional sound is superimposed in the exhaust system 10 with the noise of the engine. The source signal 24 is here predetermined so that when superimposing the engine noise with the additional sound, the desired sound of the engine occurs in the vicinity of the vehicle.
    The source signal 24 is chosen as a function of the running situation, the driver's desire and / or the current operating parameters of the engine such as the speed of rotation or the load, among a multitude of source signals, or the source signal is generated depending on the running situation, the driver's wishes and / or current engine operating parameters.
    The source signal 24 is not particularly provided by the fact that a microphone is arranged in the exhaust line and records in real time the noise of exhaust gas or other noise.
    In the embodiment shown in FIG. 2, the source signal 24 is constituted by different signal components 26.1 to 26.6. which are arranged in a sequential manner, that is to say which succeed each other.
    The signal components 26.1 to 26.6. are oscillations of different frequencies. The duration of a signal component 26.1 to 26.6. is very short, for example only a period of the corresponding oscillation.
    The signal components 26.1 to 26.6. are for example a period of a sinusoidal sound. However, it is also conceivable that the signal components 26.1 to 26.6. or the source signal 24 as a whole consist of previously recorded signals.
    In the source signal 24 shown in FIG. 2, the signal components 26.1, 26.2, 26.5 and 26.6 are each a period of oscillation of a first frequency f 1 and the signal components 26.3 and 26.4 are each a period of time. an oscillation with a second frequency f2.
    For example, the first frequency f! is 78 Hertz, and the second frequency F2 143 Hertz, so that the signal components 26.1, 26.2, 26.5 and 26.6 each have a length of 0.0115 seconds, and the signal components 26.3 and 26.4 each have a length of 0.007 seconds.
    The amplitudes of the signal components 26.1 to 26.6 are each of the same magnitude, which may also be advantageous in the case of signal components with frequencies other than those mentioned above. Of course, these amplitudes can also be chosen differently.
    The source signal 24 may be a repetition of the section shown in FIG. 2 or yet also any other sequence of these and / or other signal components 26.1 to 26.6.
    The predetermined source signal 24 thus generated has, in addition to the frequencies ί1; f2 signal components 26.1 to 26.6, other oscillations 28 other frequencies. This results from the fact that the signal components 26.1 to 26.6 are each very short and in this case only last one period, but that the source signal 24 formed therefrom is however several orders of magnitude longer.
    The source signal 24 is now analyzed by the control in that the phase of the source signal 24 and / or the phase of at least one oscillation 28 present in the source signal 24 is determined.
    This is produced for example by means of a transformation of the source signal 24 in the frequency range, for example by a Fourier transform or a fast Fourier transform (FFT). In FIG. 3 is represented the source signal 24 in the frequency range, but without phase information, for the sake of clarity. Likewise, all oscillations 28 have not been provided with reference numerals. In the frequency range we can now identify the individual oscillations 28 and determine their phase.
    For example, the source signal 24 is designed such that the frequencies of the oscillations 28 are multiples of the half-rotation frequency of the motor and the oscillations 28 are thus multiples of the 0.5th order of the motor.
    In a next step, the engine noise 30 is analyzed by the control 20 which also has several oscillations 32. In Figure 4 is shown an extract of a motor noise 30 in sections relative to time, so in the range of time. This signal is recorded for example by the microphone 22 and transmitted to the control 20.
    The motor noise 30 is also analyzed by the control 20, and the phase of the motor noise 30 and / or the phase of at least one oscillation 32 present in the motor noise 30 is detected.
    This can also be produced via a transformation of the motor noise in the frequency range, in particular by a Fourier transform or a fast Fourier transform (FFT).
    Moreover or alternatively, the phase of the motor noise 30 and / or the phase of at least one oscillation 32 present in the motor noise 30 can be detected using data from the sensors and / or data transmitted by the motor control to the control 20.
    For example, the motor control transmits to the control 20 information relating to the rotation speed of the engine and / or the engine phase from the point of view of the top dead center of the first cylinder, information from which the control 20 then detects the phase of the motor noise 30 and / or the phase of at least one oscillation 32 present in the motor noise 30.
    A representation of the motor noise 30 in the frequency range is shown in FIG. 5. Here too, for the sake of clarity, a representation of the different phases has been omitted, and all the oscillations have not been provided. of reference numbers.
    However, it can be well recognized that in the motor noise 30, different oscillations are particularly strong. These oscillations 32 correspond to the harmonic oscillations of the engine orders or engine ignition orders and are hereinafter called engine orders. The 0.5th order of the motor here has the frequency of the half-frequency of rotation of the motor. This is why the frequencies of the motor commands and consequently the frequencies of the oscillations 28 of the source signal 24 or of the signal components 26.1 to 26.6 correspondingly increase with the increase in the speed of rotation of the motor.
    In the case of the motor noise 30 shown in FIG. 5, the 4th order of the motor M04 has, with a frequency of 100 Hertz, the highest level and is thus particularly present. Likewise, the third order of the motor M03 and the 5th order of the motor M05 with a frequency of approximately 75 or 125 Hertz, respectively, are particularly strong. The phase of at least one of these motor commands M03, M04, M05 is determined by the command 20.
    In the next step, the source signal 24 is now adapted to the motor noise 30, a phase shift of the source signal 24 being performed.
    As a reference point of the phase shift, a preferred motor command M03, M04, M05 can be selected. For example, the order of the engine with the highest level is required, in this case the 4th order of the engine M04. However, it is also conceivable to choose another order of the preferred engine.
    An oscillation 28 in this order of the preferred motor, here the 4th order of the motor M04 with 100 Hertz, is also in the source signal 24, which is also designated by M04 in FIG. 3. The phase of this oscillation 28 of the source signal 24, corresponding to this 4th order of the motor M04, is then shifted so that it is adapted to the phase of the fourth order oscillation 32 of the motor noise motor M04. The adaptation takes place for example so that the oscillations 28, 32, of the 4th order of the motor M04 have the same phase both in the source signal 24 and in the motor noise 30, the phases being thus placed at the same level and the oscillations 28, 32 thereby amplifying each other.
    However, it is also conceivable that the phase of the fourth order oscillation 28 of the motor M04 of the source signal 24 is adapted so that it is in phase opposition with respect to the oscillation 32 of the 4th order of the noise motor. motor 30, so that the oscillations are suppressed mutually and damping of the motor noise 30 is caused.
    The phase shift of the source signal 24 can here already be performed in the frequency range.
    During the phase shift of the oscillation 28 of the preferred motor order of the source signal 24, the phases of the other oscillations 28 of the source signal 24 are also shifted by the same value, so that a fixed phase relation individual oscillations 28 and therefore also individual signal components 26.1 to 26.6 are maintained. It can thus be ensured that the shape of the source signal 24 in the temporal range is not modified, that is to say that the desired additional tone is not modified by the phase shift.
    Then, a driving signal for the loudspeaker 14 is generated from the source signal 24 now out of phase, for example by an inverse transform from the frequency range into the time range. This can also be done by command 20.
    The amplitudes, present before adaptation, oscillations 28 present in the source signal 28, are here generally maintained.
    The driving signal is then converted by the loudspeaker 14 into sound waves, thus into the desired additional sound, and is superimposed at the contact point 18 with the motor noise 30, the desired engine tone being generated.
    An additional possibility for influencing vehicle noise is to influence the levels of the source signal 24 as a function of frequency to eliminate unwanted noise due to resonances in the vehicle.
    In a vehicle, parts of the bodywork can be vibrated when in the engine noise 30 or in the source signal 24, there are oscillations with the resonant frequency ωΗ precisely these body parts. If, for example, for a predetermined motor speed, a motor noise motor command 30 or a source signal 24 passes through the resonance frequency ooR of a bodywork part, that bodywork piece begins to vibrate.
    To reduce these vibrations, the level or amplitude of the oscillation 28 present at that time in the source signal 24 is reduced with the frequency wR.
    This case can occur when the speed of the motor increases, when the frequency ω of said at least one oscillation 28 of the source signal 24 depends on the speed of the motor. With the speed of the motor then also increases the frequency ω of this oscillation, so that this frequency ω, for some engine speeds, is close to the resonance frequency ωΗ. In this way, the oscillation 32 of the engine tone, which causes undesirable vibration, is damped without disturbing the other oscillations 28 of the source signal 24. The signal of the additional tone is certainly thus modified in the range delay, but this is accepted to eliminate unwanted body resonances.
    It is furthermore conceivable that the motor noise phase 30 and / or the phase of at least one oscillation 32 present in the motor noise 30 is detected by the fact that the control 20 uses sensor data, including data from a motor control for determining from these data the individual motor noise 30, phase or phase of individual oscillations 32 or engine orders M03, M04, M05.
    Similarly, it is possible for the phase of one and / or of the oscillation 28 of the source signal 24, corresponding to the order of the preferred motor, such as the third, fourth or fifth order of the motor M03, M04. M05, is shifted in such a way that it is shifted by 180 ° from the phase of the oscillation 32 of the motor noise corresponding to this order of the motor and / or to the order of the preferred motor M03, M04, M05. These oscillations 28, 32 are then in phase oppositions with respect to each other and are mutually suppressed. In this way, it is possible to selectively remove motor commands from the motor noise and to reduce overall motor noise.
    We will now address a second embodiment of a source signal 24, using the reference numbers and their meaning. In particular, reference will be made to motor noise 30 according to FIGS. 4 and 5.
    The source signal 24 of the second embodiment is shown in FIG. 6 in the time delay range.
    In this second embodiment, the signal components 26 are sinusoidal sounds of different frequencies, which are superimposed.
    Correspondingly, the signal components 26 are at the same time the oscillations 28 present in the source signal 24.
    In the highly simplified example, shown in FIG. 6, the source signal 24 (Sa (t)) consists of a superposition of three sinusoidal oscillations according to the following formula: SQ (t) = sin (cot) + sin ( 3tot) + j sin (5 early).
    The source signal 24 shown in FIG. 6 has an effective value of the voltage which is greater than 50%, in particular greater than 80% of the maximum voltage of the loudspeaker. Clearly, the actual value can be included as the area of the graphs and is shown in Figure 6 in shaded area for a period. With an effective value as large as possible, it is ensured that the loudspeaker is best used for noise generation since a large effective value corresponds to a high perceived volume.
    Steeper flanks and thus higher effective values can also be achieved by the superposition of even more oscillations 28, for example ten oscillations.
    In the embodiment shown in FIG. 6, for the sake of clarity, only three oscillations 28.1, 28.2, 28.3 can be seen, as can be seen from the representation of the source signal 24 in the frequency range (FIG. 7). .
    The source signal of this embodiment also has an oscillation 28.1 with a frequency of 100 Hertz, thus an oscillation which corresponds to the 4th order of the motor M04.
    The phase of this 4th order oscillation 28.1 of the motor M04 can now, as described above, be adapted to the phase of the 4th order oscillation 32 of the motor noise engine M04 30.
    In the case of a source signal 24 which has been designed for a high effective value of the voltage, as in the source signal 24 of this second embodiment, it is in particular very important that the phase relationships of the oscillations 28.1, 28.2, 28.3 of the source signal 24 are held relative to each other. This makes it possible to retain the shape and thus the high effective value of the voltage of the source signal 24 in the time range.
    Of course, the source signals 24 of the first and second embodiments may be switched at will without the benefits and functions of the exhaust process or plant being altered.
    It is also conceivable that the loudspeaker 14 is not provided in the exhaust system 10, but in the passenger compartment 34 of the vehicle 11, as shown schematically in FIG.
    The loudspeaker of this embodiment can operate analogously to the method explained above, and in this case, the desired engine tone is not the sound emitted in the environment, but the sound of the engine such as it is perceived by the passenger in the passenger compartment 34.
    The loudspeaker 14 may also be a part of an audio system 36 which also includes the control 20.
    The loudspeaker 14 and / or the audio system 36 can here be part of a music and / or entertainment installation 38 of the vehicle 11,
    Of course, it is conceivable to provide not only at least one speaker 14 in the exhaust system 10, but also at least one speaker 14 in the passenger compartment 34 to be able to build both the sound emitted in the surround that the sound perceived by the passengers.
    The control signal for the loudspeaker 14 is here generated certainly with the same method as described above, but the source signal 24 itself must not be identical for these two methods.
    权利要求:
    Claims (16)
    [1" id="c-fr-0001]
    claims
    A method of generating a driving signal for a loudspeaker (14) arranged in a motor vehicle (11), in particular in an exhaust system (10) of the vehicle engine (11) or in or outside a vehicle passenger compartment (34), comprising the following steps: a) providing a predetermined source signal (24) for additional sound in the time range, which comprises a plurality of signal components (26; 26.1; 26.2, 26.3, 26.4, 26.5, 26.6) of different frequencies, b) Analysis of the source signal (24) from the point of view of the phase of the source signal (24) and / or the phase of at least one oscillation (28). 28.1, 28.2, 28.3) present in the source signal (24), c) Detecting the phase of the motor noise (30) and / or the phase of at least one oscillation (32) present in the engine noise (30), d) Offset of the phase of the source signal (24) and / or the phase of said at least one oscillation (28; 28.1, 28.2, 28.3) present in the source signal (24) as a function of the detected phase of the motor noise (30) and / or the detected phase of the at least one oscillation (32) present in the motor noise (30), the phase relationship each of the oscillations (28; 28.1, 28.2, 28.3) of the source signal (24) relative to each other being retained, and e) Generating the control signal on the basis of the phase-shifted source signal (24).
    [2" id="c-fr-0002]
    2. Method according to claim 1, characterized in that said one oscillation (32 or 28; 28.1, 28.2, 28.3) present in the motor noise (30) and / or in the source signal (24) is a harmonic oscillation of one of the motor commands (M03, M04, M05), in particular a multiple of the 0.5th order of the motor.
    [3" id="c-fr-0003]
    3. Method according to claim 2, characterized in that, in order to shift the phases, a preferred motor command (M04) is determined, the phase of the oscillation (28; 28.1) of the source signal (24) corresponding to this order of the motor (M04) and the phase of the oscillation (32) of the motor noise (30) corresponding to this order of the motor (M04) being preferred adapted to each other, in particular at the same level.
    [4" id="c-fr-0004]
    4. Method according to claim 2 or 3, characterized in that the phase of oscillation and / or oscillation (28; 28.1,28.2, 28.3) of the source signal (24) corresponding to the order of the motor ( M03, M04, M05) and the phase of the oscillation (32) of the motor noise (30) corresponding to this order and / or the order of the motor (M03, M04, M05) preferred are shifted by 180 ° one with respect to the other.
    [5" id="c-fr-0005]
    5. Method according to one of the preceding claims, characterized in that the offset of the phase of the source signal (24) is performed in the frequency range.
    [6" id="c-fr-0006]
    6. Method according to one of the preceding claims, characterized in that the analysis of the source signal (24) is performed by means of a transform in the frequency range, in particular by means of a Fourier transform or a Fast Fourier Transform (FFT).
    [7" id="c-fr-0007]
    Method according to one of the preceding claims, characterized in that the phase of the motor noise (30) and / or the phase of at least one oscillation (32) present in the motor noise (30) is determined by a transformation of the motor noise (30) in the frequency range, in particular by a Fourier transform or a fast Fourier transform (FFT) and / or using sensor data.
    [8" id="c-fr-0008]
    8. Method according to one of the preceding claims, characterized in that the source signal (24) comprises signal components (26; 26.1, 26.2, 26.3, 26.4, 26.5) which consist of a previously recorded signal.
    [9" id="c-fr-0009]
    9. Method according to one of the preceding claims, characterized in that the source signal (24) comprises signal components (26; 26.1, 26.2, 26.4, 26.5), in particular sinusoidal sounds.
    [10" id="c-fr-0010]
    10. Method according to one of the preceding claims, characterized in that the level of an oscillation (28; 28.1, 28.2, 28.3) present in the source signal (24) is reduced when the frequency ω of this oscillation (28; 28.1, 28.2, 28.3) is close to the frequency ωΗ of undesirable resonance.
    [11" id="c-fr-0011]
    11. Method according to one of the preceding claims, characterized in that the source signal (24) has an effective value of the voltage of at least 50%, preferably at least 80% of the maximum voltage of the loudspeaker. speaker (14).
    [12" id="c-fr-0012]
    12. Exhaust system for an engine, in particular a motor vehicle (11), comprising a loudspeaker (14) and a control (20), the control (20) being provided for implementing a method according to one of the preceding claims and for controlling the loudspeaker (14) with the control signal.
    [13" id="c-fr-0013]
    13. Exhaust system according to claim 12, characterized in that the exhaust system (10) has an exhaust line (12) and a microphone (22), the loudspeaker (14) being in contact fluidic with the exhaust line (12) at a point of contact (18), and the microphone (22) being arranged upstream or downstream of the point of contact (18).
    [14" id="c-fr-0014]
    14. Audio system of a motor vehicle (11), in particular for a vehicle interior (34), comprising at least one loudspeaker (14) and a control (20), the control (20) being adapted to implement a method according to one of claims 1 to 11 and to control the speaker (14) with the control signal.
    [15" id="c-fr-0015]
    15. Audio system according to claim 14, characterized in that the speaker (14) is arranged in or outside the vehicle cabin (34).
    [16" id="c-fr-0016]
    16. An audio system according to claim 15, characterized in that the audio system (36) is part of a music installation and / or entertainment (38) of the vehicle (11).
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    同族专利:
    公开号 | 公开日
    DE102016100542A1|2017-07-20|
    CN107071637A|2017-08-18|
    KR20170085442A|2017-07-24|
    FR3046872B1|2018-10-26|
    CN107071637B|2021-04-23|
    US20170206883A1|2017-07-20|
    US9990913B2|2018-06-05|
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    法律状态:
    2018-01-25| PLFP| Fee payment|Year of fee payment: 2 |
    2018-03-23| PLSC| Publication of the preliminary search report|Effective date: 20180323 |
    2020-01-27| PLFP| Fee payment|Year of fee payment: 4 |
    2021-01-25| PLFP| Fee payment|Year of fee payment: 5 |
    2021-12-15| PLFP| Fee payment|Year of fee payment: 6 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102016100542.8A|DE102016100542A1|2016-01-14|2016-01-14|Method for generating a drive signal for a loudspeaker arranged in a motor vehicle and exhaust system for an engine and sound system for a passenger compartment|
    DE102016100542.8|2016-01-14|
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