Method and device for suppressing acoustic interference signals resulting from the operation of a motor-vehicle drive unit

Abstract

Method for suppressing acoustic interfering signals, introduced into a passenger compartment of the motor vehicle, including: detecting a physical size in the passenger compartment of the motor vehicle, generating a detection information describing the detected physical size in the passenger compartment of the motor vehicle, selection of a counter-signal parameter influencing the acoustic counter-signal, depending upon the physical size described through the detection information, and/or adaptation of a counter-signal parameter influencing the acoustic counter-signal, depending upon the physical size described through the detection information, generating an acoustic counter-signal on the basis of the selected counter-signal parameter and/or on the basis of the adapted counter-signal parameter, and outputting the generated acoustic counter-signal into the passenger compartment of the motor vehicle to suppress acoustic interfering signals, introduced into the passenger compartment of the motor vehicle, resulting from the operation of the on-board drive unit.

Claims

1. Method for suppressing acoustic interfering signals, introduced into a passenger compartment of the motor vehicle, resulting from the operation of an on-board drive unit, by means of at least one artificially-generated acoustic counter-signal, defined through at least one counter-signal parameter, comprising the following steps: detecting at least one physical size in the passenger compartment of the motor vehicle via one or more detection elements arranged or configured inside the passenger compartment of the motor vehicle, wherein the at least one physical size comprises climatic conditions in at least a part of the passenger compartment, generating at least one detection information describing the at least one detected physical size in the passenger compartment of the motor vehicle, selection of at least one counter-signal parameter influencing the acoustic counter-signal, depending upon the physical size described through the detection information, and/or adaptation of at least one counter-signal parameter influencing the acoustic counter-signal, depending upon the physical size described through the detection information, generating an acoustic counter-signal on the basis of the at least one selected counter-signal parameter and/or on the basis of the at least one adapted counter-signal parameter, and outputting the generated acoustic counter-signal into the passenger compartment of the motor vehicle to suppress acoustic interfering signals, introduced into the passenger compartment of the motor vehicle, resulting from the operation of the on-board drive unit.

2. Method according to claim 1, wherein the selection of an acoustic counter-signal parameter occurs from a storage device containing multiple acoustic counter-signal parameters, depending upon the physical size described through the detection information, wherein acoustic counter-signal parameters, respectively assigned to at least one established physical size, is stored data-accordantly in the storage device.

3. Method according to claim 1, wherein the adaptation of the, in particular pre-selected, acoustic counter-signal parameter occurs by means of a adaption function selected depending upon the physical size described through the detection information.

4. Method according to claim 3, wherein the selection of an adaptation function occurs from a storage device containing multiple adaptation functions, depending upon the physical size described through the detection information, wherein adaptation functions respectively assigned to at least one established physical size are stored data-accordantly in the storage device.

5. Method according to claim 1, wherein a pressure or a moisture or a temperature is detected as the at least one physical size inside the passenger compartment of the motor vehicle.

6. Method according to claim 1, wherein a course of the at least one physical size temporally-dependent over a certain time period is detected.

7. Method according to claim 1, wherein the at least one physical size in continuously or discontinuously detected.

8. Method according to claim 1, wherein the phase of the acoustic counter-signal, or the frequency of the acoustic counter-signal, or a transfer path describing the phase and the frequency of the acoustic counter-signal or the intensity of the acoustic counter-signal is used as the at least one parameter influencing the acoustic counter-signal.

9. Method according to claim 1, wherein all counter-signal parameters influencing the acoustic counter-signal are selected, within the scope of the selection of the at least one counter-signal parameter influencing the acoustic counter-signal, so that a completely new acoustic counter-signal is selected and/or so that all counter-signal parameters influencing the acoustic counter-signal are adapted, in the scope of the adaptation of the at least one counter-signal parameter influencing the acoustic counter-signal, so that a complete acoustic counter-signal is adapted.

10. Device for suppressing acoustic interfering signals, introduced into a passenger compartment of the motor vehicle, resulting from the operation of an on-board drive unit, by means of at least one artificially-generated acoustic counter-signal, defined through at least one counter-signal parameter, in particular according to the method according to claim 1, including a detection device, a control unit, a storage device and an output unit, wherein the detection device is configured to detect the at least one physical size in the passenger compartment of a motor vehicle, wherein the at least one physical size comprises climatic condition in at least a part of the passenger compartment, wherein the detection device comprises one or more detection elements arranged or configured inside a passenger compartment of the motor vehicle, the control unit is configured to generate at least one detection information describing the at least one detected physical size in the passenger compartment of the motor vehicle and to select at least one counter-signal parameter influencing the acoustic counter-signal from the storage device, depending upon the physical size described through the detection information, and/or to adapt at least one counter-signal parameter influencing the acoustic counter-signal from a storage device, depending on the physical size described through the detection information, as well as to generate an acoustic counter-signal, on the basis of the least one selected counter-signal parameter and/or on the basis of the at least one adapted counter-signal parameter, and the output device is configured to output the generated acoustic counter-signal into the passenger compartment of the motor vehicle to suppress acoustic interfering signals, introduced into the passenger compartment of the motor vehicle, resulting from the operation of the on-board drive unit.

11. Device according to claim 10, wherein the control unit contains multiple acoustic counter-signal parameters, wherein acoustic counter-signal parameters respectively assigned to at least one established physical size are stored data-accordantly in the storage device.

12. Device according to claim 10, wherein the control unit is configured to carry out the adaption of the in particular pre-selected acoustic counter-signal parameter by means of an adaptation function selected depending upon the physical size described through the detection information.

13. Device according to claim 12, wherein the storage device includes multiple adaption functions, wherein adaption functions respectively assigned to at least one established physical size are stored data-accordantly in the storage device.

14. Device according to claim 1, wherein the at least one physical size is a pressure or the moisture or the temperature inside the passenger compartment of the motor vehicle.

15. Device according to claim 10, wherein the detection device is configured to detect a course of the at least one physical size temporarily-dependent over a certain time period.

16. Device according to claim 10, wherein the detection device is configured to continuously or discontinuously detect the at least one physical size.

17. Device according to claim 10, wherein the at least one parameter influencing the acoustic counter signal is the phase of the acoustic counter signal of the frequency of the acoustic counter signal or a transfer path describing the phase and the frequency of the acoustic counter signal, or the intensity of the acoustic counter signal.

18. Device according to claim 10, wherein the control unit is configured to select all counter signal parameters influencing the acoustic counter signal in the scope of the selection of the at least one counter signal parameter influencing the acoustic counter signal, so that a completely new acoustic counter signal is selected, and/or to adapt all counter signal parameter influencing the acoustic counter signal in the scope of the adaption of the at least one counter signal parameter influencing the acoustic counter signal, so that a complete acoustic counter signal is adapted.

19. Motor vehicle, comprising at least one drive unit and a device according to claim 10, wherein acoustic interfering signals resulting from the operation of the drive unit introducible into the passenger compartment are compensatable or compensated by the device.

Description

(1) The invention is further described based on an exemplary embodiment in the illustration figures. Here, the single FIGURE shows a basic principle representation of a device according to an exemplary embodiment.

(2) The device 1 shown in the Fig. is arranged or configured in a motor vehicle 2 indicated purely schematically, and is configured to suppress interfering signals 5, i.e. in particular vibrations, introduced into the passenger compartment 4 of the motor vehicle 2, resulting from the operation of the on-board drive unit 3, i.e. typically an electric motor and/or an internal combustion engine, by means of at least one artificially generated counter-signal 6, defined through at least one counter-signal parameter. Corresponding interfering signals 5 can be detected by means of the device 1 and on the basis of the detected interfering signals 5, counter-signals 6 can be artificially generated and output into the passenger compartment 4. The device 1, therefor, comprises a sensor 7, e.g. in the form of one or multiple microphone unit(s), to detect corresponding interfering signals 5 and an output unit 8, e.g. in the form of one or multiple loudspeaker units, for outputting corresponding counter-signals 6 into the passenger compartment 4, as functional components. The sensor 7 and the output device 8 are (data-accordantly) connected with a central control unit 9, implemented by hard and/or software, as further functional component of the device 1.

(3) Further functional components of the device 1 include the detection device 10 and the storage device 11. The detection device 10 and the storage device 11 are likewise connected (data accordantly) with the control unit 9. The detection device 10 is configured, in the passenger compartment 4, to detect at least one physical size, i.e. e.g. the pressure or the moisture or the temperature and, to that end, includes suitable detection elements (not shown), i.e. e.g. pressure, moisture or temperature sensors. The storage device 11, if necessary configured as a look-up table, is configured to store data or information and, to that end, includes suitable data storage elements (not shown).

(4) A method for suppressing (damping) of interfering signals 5, introduced into the passenger component 4, resulting from the operation of the drive unit 3, by means of artificially generated counter-signals 6, defined through at least one counter-signal parameter, can be implemented by means of the device 1 or through the cooperation of the described functional components of the device 1. The method, accordingly, makes the acoustic suppression or damping of corresponding interfering signals 5 through the targeted generation of artificial counter-signals 6 possible. The counter-signals 6 effect an, if necessary, complete suppression of the interfering signal 5, in particular on the basis of a phase reverse to the phase of the respective interfering signals 5.

(5) In a first step of the method, at least one physical size, under which a value or value range of the respectively established physical size, i.e. e.g. a pressure, moisture, or temperature value is certainly also to be understood, is detected in the passenger compartment 4 by means of the detection device 10. The physical size can, as mentioned, e.g. relate to the pressure, the moisture or the temperature in the or inside the passenger compartment 4. The detection of respective physical sizes make a more or less complete representation of the detected physical, if necessary climatic conditions in the passenger compartment 4 possible, depending upon the number of detected physical sizes. The detection of the physical size(s) can occur continuously or discontinuously, and can also include a course, temporally-dependent over a certain time period, of a physical size.

(6) In a second step of the method, a detection information describing the at least one physical size is generated, e.g. by means of the detection device 10. The physical size(s) or values detected by means of the detection device 10 are accordingly represented in a data accordantly (further) processable detection information.

(7) In a third step of the method, at least one counter-signal parameter influencing the counter-signal 6 is selected, depending upon the physical size(s) described through the detection information, from the storage device 11. Multiple counter-signal parameters are therefore, data-accordantly stored in the storage device 11. Respective counter-signal parameters are stored linked with an established physical size or an established value or value range of a certain physical size. An established physical size or an established value or value range of an established physical size is accordingly assigned to respective counter-signal parameters. The selection of a corresponding counter-signal parameter occurs on the basis of the physical size described through the detection information, wherein a counter-signal parameter is selected, the assigned physical size of which or the assigned value of which corresponds to the physical size described through the detection information. To that end, suitable selection algorithms can be employed. The assignment of respective counter-signal parameters to respective physical sizes can result on the basis of assignment criteria gained from preliminary investigations, in which the influence of different physical parameters on the suppression of corresponding interfering signals 5, in the passenger compartment 4, was examined.

(8) Via an adaptation function, EOC parameters or EOC tuning parameters, e.g. A (forgetting factor) or μ (step width), can also be adapted. In other words, an adaptation of EOC parameters or EOC tuning parameters can result by means of an adaptation function selected depending upon the physical size described through the detection information. The EOC parameters or EOC tuning parameters influence corresponding counter-signal parameters, an adaptation of counter-signal parameters can thus occur via an adaptation of EOC parameters or EOC tuning parameters.

(9) Alternatively or additionally, at least one counter-signal parameter, in particular pre-selected, influencing the counter signal 6, is, in the third step of the method, adapted or changed depending upon the physical size described through the detection information. The adaptation of the counter-signal parameter occurs by means of an adaptation function or specification, i.e. an adaptation algorithm, selected depending on the physical size described through the detection information. The adaptation function can, e.g. contain an interpolation or an extrapolation of a respective counter-signal parameter with respect to an established target size. The selection of an adaptation function occurs depending upon the physical size described through the detection information. Multiple counter-signal parameters are stored data accordantly in the storage device 11. Respective adaptation functions are stored linked with an established physical size or an established physical value or value range of an established physical size. An established physical size or an established physical value or value range of an established physical size is accordingly assigned respective adaptation functions. The selection of a corresponding adaptation function occurs on the basis on the physical size described through the detection information, wherein an adaptation function, the assigned physical size of which or the assigned value of which corresponds to the physical size described through the detection information, is selected. To that end, suitable selection algorithms can, in turn, be employed. The assignment of respective adaptation functions to respective physical sizes can, in turn, result based on assignment criteria gained from corresponding preliminary inquiries, in which the influence of different physical parameters on the suppression of corresponding interfering signals, in the passenger compartment 4, was examined.

(10) Corresponding counter-signal parameters can, e.g. relate to the phase of the counter-signal 6 or the frequency of the counter-signal 6 or a transfer path describing the phase and the frequency of the counter-signal 6 or the intensity of the counter-signal 6. The transfer path typically refers to the actual spatial arrangement of the sensor 7, indicated through the double arrow, for detecting a corresponding interfering signal 5 relative to the output unit 8 for outputting a corresponding counter-signal 6.

(11) In a fourth step of the method, the counter-signal 6 is generated, in the control unit 9, on the basis of the selected counter-signal parameter and/or on the basis of the adapted counter-signal parameter. The generation of the counter-signal 6 or the acoustic features thereof rests or rest accordingly, on the one hand, on the interfering signal 5 to be suppressed, and, on the other hand, on the physical conditions in the passenger compartment 4 represented through respectively detected physical sizes.

(12) In a fifth step of the method, the generated counter-signal 6 is output by means of the output unit 8 in the passenger compartment 4 to suppress corresponding interfering signals 5. As mentioned, the counter-signal 6 typically has a phase reverse to the interfering signal 5 to be suppressed.

(13) Within the scope of the selection of the counter-signal parameter, all counter-signal parameters influencing the counter-signal 6 can certainly also be selected, so that a completely new counter-signal 6 is selected. Correspondingly, all counter-signal parameters influencing the counter-signal 6 can, within the scope of the adaptation of the counter-signal parameter, be adapted, so that a complete counter-signal 6 is adapted.