CN114421804B - Broadband vibration device and control method thereof - Google Patents
Broadband vibration device and control method thereof Download PDFInfo
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- 101100451506 Arabidopsis thaliana HSP90-2 gene Proteins 0.000 description 5
- 101100144630 Scheffersomyces stipitis (strain ATCC 58785 / CBS 6054 / NBRC 10063 / NRRL Y-11545) LRA2 gene Proteins 0.000 description 5
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
- H02N2/028—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors along multiple or arbitrary translation directions, e.g. XYZ stages
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63F—CARD, BOARD, OR ROULETTE GAMES; INDOOR GAMES USING SMALL MOVING PLAYING BODIES; VIDEO GAMES; GAMES NOT OTHERWISE PROVIDED FOR
- A63F13/00—Video games, i.e. games using an electronically generated display having two or more dimensions
- A63F13/25—Output arrangements for video game devices
- A63F13/28—Output arrangements for video game devices responding to control signals received from the game device for affecting ambient conditions, e.g. for vibrating players' seats, activating scent dispensers or affecting temperature or light
- A63F13/285—Generating tactile feedback signals via the game input device, e.g. force feedback
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
- H02N2/06—Drive circuits; Control arrangements or methods
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Abstract
The application provides a broadband vibration device and a control method thereof, wherein the method comprises the following steps: acquiring frequency characteristics, pulse vibration waveform digital sequences, target broadband signals and target information of the broadband vibration device; setting a first resonance frequency band of the broadband vibration device as a broadband and setting a second resonance frequency band resonance frequency point of the broadband vibration device as a pulse frequency point according to the frequency characteristic of the broadband vibration device; generating a broadband vibration signal according to the target broadband signal and the broadband; constructing a pulse vibration waveform library corresponding to the pulse vibration waveform digital sequence according to the pulse vibration waveform digital sequence and the pulse frequency point; selecting a pulse vibration waveform corresponding to the target information from a pulse vibration waveform library to generate a pulse vibration signal; and driving the broadband vibration device according to the broadband vibration signal and the pulse vibration signal. Compared with the prior art, the application can simultaneously realize abundant broadband vibration feedback and strong and crisp pulse vibration experience.
Description
Technical Field
The application relates to the technical field of intelligent equipment, in particular to a broadband vibration device and a control method thereof.
Background
The linear motor (Linear Resonant Actuator, LRA) has been widely used in various vibration scenes of consumer electronics, especially in games and augmented reality AR/virtual reality VR products, by virtue of its strong, rich, crisp, low energy consumption, etc.
The existing LRA vibration device generally adopts vibration with a single frequency, however, the vibration richness of the single frequency is limited, and the vibration requirement of the current electronic product cannot be met.
Disclosure of Invention
The application aims to provide a broadband vibration device and a control method thereof, so as to realize abundant broadband vibration feedback and strong and crisp pulse vibration experience.
The first aspect of the present application provides a broadband vibration device, comprising:
A first linear resonant unit and a second linear resonant unit; wherein,
The first linear resonance unit has a first resonance frequency band in a middle-low frequency band and a first Q value;
The second linear resonant unit has a second resonant frequency band at a high frequency band and a second Q value;
The first resonant frequency band is wider than the second resonant frequency band, and the first Q value is less than the second Q value.
In a possible implementation manner, in the broadband vibration device provided by the embodiment of the present application, the first linear resonant unit and the second linear resonant unit are vertically overlapped, and the vibration directions are orthogonal by xy90 degrees.
In a possible implementation manner, in the broadband vibration device provided by the embodiment of the present application, the first linear resonant unit and the second linear resonant unit are horizontally overlapped, and the vibration directions are orthogonal by xy90 degrees.
In a possible implementation manner, in the broadband vibration device provided by the embodiment of the present application, the first linear resonant unit and the second linear resonant unit are vertically stacked, and the vibration directions are parallel.
In a possible implementation manner, in the broadband vibration device provided by the embodiment of the present application, the first linear resonant unit and the second linear resonant unit are horizontally stacked, and the vibration directions are parallel.
A second aspect of the present application provides a control method based on the broadband vibration apparatus of the first aspect, including:
acquiring frequency characteristics, pulse vibration waveform digital sequences, target broadband signals and target information of the broadband vibration device;
Setting a first resonance frequency band of the broadband vibration device as a broadband [ fL, fH ] and setting a second resonance frequency band resonance frequency point of the broadband vibration device as a pulse frequency point fP according to the frequency characteristic of the broadband vibration device;
generating a broadband vibration signal according to the target broadband signal and the broadband [ fL, fH ];
Constructing a pulse vibration waveform library corresponding to the pulse vibration waveform digital sequence according to the pulse vibration waveform digital sequence and the pulse frequency point fP;
Selecting a pulse vibration waveform corresponding to the target information from the pulse vibration waveform library to generate a pulse vibration signal;
And driving the broadband vibration device according to the broadband vibration signal and the pulse vibration signal.
Compared with the prior art, the broadband vibration device has the characteristics that the sweep frequency characteristic has wider amplitude response in the middle-low frequency band and has higher peak amplitude response in a certain high-frequency point. The richness of vibration is reflected by designing a broadband signal matched with scenes such as games in the middle-low frequency range; the diversified pulse vibration waveforms are designed at the high-frequency resonance frequency points to realize the operation such as key press, rocker, shoulder key and the like and the pulse vibration feedback triggered by game scene events and the like, so that abundant broadband vibration feedback and strong and crisp pulse vibration experience are realized at the same time.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
FIG. 1 shows a typical sweep frequency characteristic of a broadband vibration device of the present application;
FIG. 2 shows a superposition of two motors in the broadband vibration device of the present application;
FIG. 3 is a flow chart showing a control method of the broadband vibration apparatus of the present application;
Fig. 4 is a flowchart showing step S103 in the control method of the broadband vibration apparatus of the present application;
Fig. 5 shows a schematic diagram of a pulse vibration waveform corresponding to the pulse vibration waveform number sequence 1;
FIG. 6 shows a schematic diagram of a pulse vibration waveform corresponding to the pulse vibration waveform number sequence 2;
fig. 7 is a block diagram of a hardware driving system supported in the implementation process of the control method of the broadband vibration device of the present application.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs.
According to the application, a broadband vibration device is formed by combining two linear resonance devices (such as a linear motor LRA) in an adhesion manner, or a broadband vibration device is formed by the structural design of a single device, so that the sweep frequency characteristic (the frequency response characteristic of acceleration amplitude) of the broadband vibration device has the amplitude response of a wider frequency band in a middle-low frequency band and has the amplitude response of a higher peak value in a certain high-frequency point. A typical sweep characteristic of the broadband vibration device is shown in fig. 1.
Specifically, the broadband vibration device provided by the application comprises: a first linear resonant unit LRA1 and a second linear resonant unit LRA2;
Wherein the first linear resonant unit LRA1 has a first resonant frequency band and a first Q value in a middle-low frequency band; the second linear resonant unit LRA2 has a second resonant frequency band at a high frequency band and a second Q value;
wherein the first resonant frequency band is wider than the second resonant frequency band, and the first Q value is smaller than the second Q value. Q value refers to the quality factor.
For example, the broadband vibration device may be a broadband low Q motor LRA1 and a narrowband high Q motor LRA2 stacked together, and the resonant frequencies and bandwidths of the two motors are set as required. For example, the resonance frequency band of the broadband motor LRA1 is set at 50Hz-170Hz, and the Q value is set at 3; the resonant frequency band of the narrow frequency motor LRA2 is set at 348Hz-360Hz and the q value is set at 8.
As shown in fig. 2, the two motors may be vertically stacked with the vibration direction being in an xy90 degree orthogonal direction, as shown in fig. 2 (a); or the positions can be horizontally overlapped, and the vibration direction is in an xy 90-degree orthogonal direction, as shown in fig. 2 (b); or the positions are vertically overlapped, and the vibration directions are parallel, as shown in fig. 2 (c); or the positions can be horizontally overlapped, and the vibration directions are parallel, as shown in fig. 2 (d).
For example, the broadband vibration device may be a motor having a dual resonance frequency, wherein two resonance frequency ranges are set according to needs, for example, in this case, the first resonance frequency range is set to 50Hz-170Hz, and the q value is set to 3; the second resonance frequency band is set at 348Hz-360Hz and the q value is set at 8.
The embodiment of the application also provides a control method of the broadband vibration device, which is based on the broadband vibration device provided by the embodiment, as shown in fig. 3, and includes the following steps S101 to S106:
s101, acquiring frequency characteristics, pulse vibration waveform digital sequences, target broadband signals and target information of the broadband vibration device;
The frequency characteristic of the broadband vibration device can be a sweep frequency characteristic curve of the broadband vibration device or sweep frequency characteristic curves of two motors forming the broadband vibration device; the first resonance frequency band and the first Q value in the middle-low frequency band, and the second resonance frequency band and the second Q value in the high frequency band can also be adopted;
the target broadband signal can be a broadband signal which is customized and designed in advance according to a game; the game sound effect can also be realized;
The target information can be operation information such as a game terminal key, a rocker, a shoulder key and the like; game scene event information;
The pulse vibration waveform digital sequence is a combination of a plurality of { pulse number n, [ amplitude u1, amplitude u2 … amplitude un ], [ duration period number NT1, [ duration period number NT2 … duration period number NTn ], [ interval period number DT1, interval period number DT2 … interval period number DTn-1] } digital sequences. Wherein the number n of pulses represents the number of pulse vibrations contained in the pulse vibration waveform unit; the amplitude un represents the amplitude of the nth pulse; the number of sustained periods NTn indicates the number of periods that the nth pulse is sustained; the number of interval periods DTn-1 indicates the number of interval periods between the start of the n-1 th pulse and the start of the n-th pulse.
S102, setting a first resonance frequency band of the broadband vibration device as a broadband [ fL, fH ] according to the frequency characteristic of the broadband vibration device, and setting a second resonance frequency band resonance frequency point of the broadband vibration device as a pulse frequency point fP; namely, setting the broadband frequency range of the broadband vibration device to be a broadband [ fL, fH ]; setting a narrow-band resonance frequency point of the broadband vibration device as a pulse frequency point fP;
S103, generating a broadband vibration signal according to the target broadband signal and the broadband [ fL, fH ];
Specifically, if the input broadband signal is a broadband signal of a game pre-customized design, step S103 is directly skipped, and the pre-customized design broadband signal is used as a broadband vibration signal to perform the subsequent steps.
If the input broadband signal is a game sound effect, as shown in fig. 4, step S103 may be implemented as follows:
S201, filtering the target broadband signal by adopting a band-pass filter to obtain a broadband component; the band of the band-pass filter is set to the wide frequency band [ fL, fH ]; for example, the band pass filter is used to filter the game sound effect to obtain a wideband component u BP (t).
S202, obtaining frequency components below the broadband in the target broadband signal;
Specifically, S202 may be implemented as follows:
filtering the target broadband signal by adopting a low-pass filter to obtain a low-frequency component of the target broadband signal; the cut-off frequency of the low-pass filter is the lower frequency limit fL of the broadband;
Detecting local maximum value of the signal with the absolute value of the low-frequency component;
carrying out low-pass filtering on the detected local maximum data to obtain a relatively smooth maximum curve u maxL (t);
Filling the maximum curve u maxL (t) with a sinusoidal signal having a frequency fL to generate a single-frequency sinusoidal signal u L (t) having an amplitude u maxL (t) and a frequency fL, wherein the single-frequency sinusoidal signal u L (t) is a frequency component below the wide frequency band.
For example, the low-pass filter is adopted to filter the input game sound effect, so as to obtain the low-frequency component of the game sound effect; taking absolute value of low frequency component of game sound effect; detecting local maximum value of the signal of the game sound effect after taking absolute value, namely recording data of continuous 3 sampling moments, comparing data of a second sampling moment in the middle with data of the first sampling moment and data of the third sampling moment, and outputting the data of the second sampling moment as local maximum value and keeping the local maximum value until the next local maximum value is updated if the data of the second sampling moment is simultaneously larger than or equal to the data of the first sampling moment and the data of the third sampling moment; carrying out low-pass filtering on the detected local maximum data to obtain a relatively smooth maximum curve u maxL (t); filling a maximum curve u maxL (t) by using a sinusoidal signal with the frequency fL to generate a single-frequency sinusoidal signal u L (t) with the amplitude of u maxL (t) and the frequency fL, namely frequency components below a broadband, wherein a specific calculation formula is as follows:
uL(t)＝umaxL(t)sin(2πfLt)；
s203, obtaining frequency components above the broadband in the target broadband signal;
Specifically, S203 may be implemented as follows:
filtering the target broadband signal by adopting a high-pass filter to obtain a high-frequency component of the target broadband signal; the cut-off frequency of the high-pass filter is the upper frequency limit fH of the broadband;
Carrying out local maximum detection on the signal with the absolute value of the high-frequency component of the target broadband signal;
carrying out low-pass filtering on the detected local maximum data to obtain a relatively smooth maximum curve u maxH (t);
Filling the maximum curve u maxH (t) with a sinusoidal signal having a frequency fH, and generating a single-frequency sinusoidal signal u H (t) having an amplitude u maxH (t) and a frequency fH, wherein the single-frequency sinusoidal signal u H (t) is a frequency component above the wide frequency band.
For example, the high-pass filter is adopted to filter the input game sound effect, so as to obtain a high-frequency component of the game sound effect; taking absolute value of high frequency component of game sound effect; carrying out local maximum detection on the signals of which the high-frequency components of the game sound effect take absolute values; carrying out low-pass filtering on the detected local maximum data to obtain a relatively smooth maximum curve u maxH (t); filling a maximum curve u maxH (t) by using a sinusoidal signal with the frequency fH to generate a single-frequency sinusoidal signal u H (t) with the amplitude of u maxH (t) and the frequency of fH, namely frequency components above a wide frequency band, wherein the specific calculation formula is as follows:
uH(t)＝umaxH(t)sin(2πfHt)；
S204, linearly superposing the broadband component, the frequency component below the broadband and the frequency component above the broadband to generate a broadband vibration signal.
Specifically, the broadband component u BP (t), the frequency component u L (t) below the broadband and the frequency component u H (t) above the broadband obtained in the above steps are linearly superimposed to generate a broadband vibration signal u 1 (t), and a specific calculation formula is as follows: u 1(t)＝uBP(t)+uL(t)+uH (t).
S104, constructing a pulse vibration waveform library corresponding to the pulse vibration waveform digital sequence according to the pulse vibration waveform digital sequence and the pulse frequency point fP;
specifically, step S104 may be implemented as follows:
The method comprises the steps of taking a sinusoidal signal with single-period frequency of fP as a basic unit, combining specific definitions of the number, amplitude, duration period number and interval period number of each pulse vibration waveform digital sequence, constructing a pulse vibration waveform corresponding to each pulse vibration waveform digital sequence, and combining all pulse vibration waveforms into a pulse vibration waveform library.
For example: the number sequence 1 of a certain pulse vibration waveform in the pulse vibration waveform library is {2, [1,0.5], [1,1], [4] }, and the constructed pulse vibration waveform is shown in fig. 5; the number sequence 2 of the pulse vibration waveform is {3, [1,0.7,0.3], [1,2,3], [4,4] }, and the pulse vibration waveform is constructed as shown in fig. 6.
S105, selecting a pulse vibration waveform corresponding to the target information from the pulse vibration waveform library to generate a pulse vibration signal;
Specifically, a pulse vibration waveform corresponding to operation information such as a key, a rocker, a shoulder key and the like in the target information and game scene event information is selected from the generated pulse vibration waveform library in advance in a self-defined manner, and then a pulse vibration signal u 2 (t) is generated according to the obtained operation information such as the specific key, the rocker, the shoulder key and the like and the game scene event information.
S106, driving the broadband vibration device according to the broadband vibration signal and the pulse vibration signal.
Specifically, if the broadband vibration device is 1 motor with dual resonance frequencies, the generated broadband vibration signal u 1 (t) and the pulse vibration signal u 2 (t) are linearly superimposed, and as the composite vibration signal u (t), the specific calculation formula is as follows: u (t) =u 1(t)+u2 (t), and driving the motor by using a power amplification circuit to generate corresponding vibration;
If the broadband vibration device is adhesion of 2 motors with single resonance frequency, the synthesis of vibration signals is not carried out, 2 independent power amplifying circuits are adopted, the broadband motor LRA1 is driven by the broadband vibration signals u 1 (t), and the narrow-frequency motor LRA2 is driven by the pulse vibration signals u 2 (t).
In a possible implementation manner, in the control method of the broadband vibration device provided by the present application, the broadband vibration sense may be further enhanced by the vibration of the narrowband motor at the resonance frequency point, and in particular, before step S106, the method may further include the following steps:
carrying out local maximum detection on the signal with the absolute value of the target broadband signal;
Carrying out low-pass filtering on the detected local maximum data to obtain a relatively smooth maximum curve u maxP (t);
Filling a maximum curve u maxP (t) by using a sinusoidal signal with the frequency of fP to generate a single-frequency sinusoidal signal u P (t) with the amplitude of u maxP (t) and the frequency of fP, wherein the single-frequency sinusoidal signal u P (t) is an intensity enhancement component; the specific calculation formula is as follows: u P(t)＝umaxP(t)sin(2πfP t);
Linearly superimposing the intensity enhancement component u P (t) and the pulse vibration signal u 2 (t) to form a new pulse vibration signal
Correspondingly, the step S106 specifically includes: and driving the broadband vibration device according to the broadband vibration signal and the new pulse vibration signal.
In order to facilitate understanding, the application also provides a hardware driving system block diagram supported in the implementation process of the control method, as shown in fig. 7, comprising the following 5 modules:
Input signal 1:
the input signal the signal input is divided into 4 parts: the frequency characteristic of the broadband vibration device, the pulse vibration waveform digital sequence, the target broadband signal and the target information;
algorithm processing 2:
the algorithm processing module performs signal processing on the input signal in the steps S101 to S105 of the control method, so as to obtain a broadband vibration signal and a pulse vibration signal;
Vibration signal 3:
the vibration signal is a motor driving voltage signal obtained after the algorithm processing module processes the input signal, and comprises a broadband vibration signal and a pulse vibration signal.
Power amplification 4:
the power amplifier used here is usually an amplifier that performs power matching on an input signal, and is usually a class a, a class B, a class AB, or a class D driver, where the input signal may be an analog signal or a digital signal with a certain system.
Broadband vibration device 5:
the broadband vibration device is obtained by adopting the adhesion mode of the application for 2 single-resonance motors, or is a single linear motor with double resonance frequencies according with the description of the application.
According to the broadband vibration device and the control method thereof, the broadband vibration device is formed by combining the 2 linear resonant devices in a blocking manner, or by the structural design of a single device, so that the sweep frequency characteristic of the device has the amplitude response of a wider frequency band in a middle-low frequency band and the amplitude response of a higher peak value in a certain high frequency point. The richness of vibration is reflected by designing a broadband signal matched with scenes such as games in the middle-low frequency range; the diversified pulse vibration waveforms are designed at the high-frequency resonance frequency points to realize the operations of keys, rockers, shoulder keys and the like and the pulse vibration feedback triggered by game scene events and the like, so that abundant broadband vibration feedback and strong and crisp pulse vibration experience are realized at the same time.
It should be noted that:
In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the application may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the above description of exemplary embodiments of the application, various features of the application are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be construed as reflecting the intention that: i.e., the claimed application requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this application.
Those skilled in the art will appreciate that the modules in the apparatus of the embodiments may be adaptively changed and disposed in one or more apparatuses different from the embodiments. The modules or units or components of the embodiments may be combined into one module or unit or component and, furthermore, they may be divided into a plurality of sub-modules or sub-units or sub-components. Any combination of all features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or units of any method or apparatus so disclosed, may be used in combination, except insofar as at least some of such features and/or processes or units are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the following claims, any of the claimed embodiments can be used in any combination.
Various component embodiments of the application may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art will appreciate that some or all of the functions of some or all of the components in the creation means of a virtual machine according to an embodiment of the present application may be implemented in practice using a microprocessor or Digital Signal Processor (DSP). The present application can also be implemented as an apparatus or device program (e.g., a computer program and a computer program product) for performing a portion or all of the methods described herein. Such a program embodying the present application may be stored on a computer readable medium, or may have the form of one or more signals. Such signals may be downloaded from an internet website, provided on a carrier signal, or provided in any other form.
It should be noted that the above-mentioned embodiments illustrate rather than limit the application, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The application may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, third, etc. do not denote any order. These words may be interpreted as names.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the specification and drawings of the present invention or direct/indirect application in other related technical fields are included in the scope of the present invention.
Claims (6)
1. A control method of a broadband vibration apparatus, the broadband vibration apparatus comprising: a first linear resonant unit and a second linear resonant unit; the first linear resonance unit has a first resonance frequency band in a middle-low frequency band and a first Q value; the second linear resonant unit has a second resonant frequency band at a high frequency band and a second Q value; the first resonant frequency band being wider than the second resonant frequency band, the first Q value being less than the second Q value, the method comprising:
acquiring frequency characteristics, pulse vibration waveform digital sequences, target broadband signals and target information of the broadband vibration device;
Setting a first resonance frequency band of the broadband vibration device as a broadband [ fL, fH ] and setting a second resonance frequency band resonance frequency point of the broadband vibration device as a pulse frequency point fP according to the frequency characteristic of the broadband vibration device;
generating a broadband vibration signal according to the target broadband signal and the broadband [ fL, fH ];
Constructing a pulse vibration waveform library corresponding to the pulse vibration waveform digital sequence according to the pulse vibration waveform digital sequence and the pulse frequency point fP;
Selecting a pulse vibration waveform corresponding to the target information from the pulse vibration waveform library to generate a pulse vibration signal;
And driving the broadband vibration device according to the broadband vibration signal and the pulse vibration signal.
2. The method of claim 1, wherein the pulse vibration waveform digital sequence comprises: the number of pulses n, [ amplitude u1, amplitude u2 … amplitude un ], [ number of sustain periods NT1, number of sustain periods NT2 … number of sustain periods NTn ], [ number of interval periods DT1, number of interval periods DT2 … number of interval periods DTn-1];
The step of constructing a pulse vibration waveform library corresponding to the pulse vibration waveform digital sequence according to the pulse vibration waveform digital sequence and the pulse frequency point fP, comprising:
The method comprises the steps of taking a sinusoidal signal with single-period frequency of fP as a basic unit, combining specific definitions of the number, amplitude, duration period number and interval period number of each pulse vibration waveform digital sequence, constructing a pulse vibration waveform corresponding to each pulse vibration waveform digital sequence, and combining all pulse vibration waveforms into a pulse vibration waveform library.
3. The method of claim 1, wherein said generating a wideband vibration signal from said target wideband signal and said wideband [ fL, fH ] comprises:
Filtering the target broadband signal by adopting a band-pass filter to obtain a broadband component; the band of the band-pass filter is set to the wide frequency band [ fL, fH ];
Acquiring frequency components below the broadband in the target broadband signal;
Acquiring frequency components above the broadband in the target broadband signal;
and linearly superposing the broadband component, the frequency component below the broadband and the frequency component above the broadband to generate a broadband vibration signal.
4. A method according to claim 3, wherein said obtaining frequency components below the wideband in the target wideband signal comprises:
filtering the target broadband signal by adopting a low-pass filter to obtain a low-frequency component of the target broadband signal; the cut-off frequency of the low-pass filter is the lower frequency limit fL of the broadband;
Detecting local maximum value of the signal with the absolute value of the low-frequency component;
carrying out low-pass filtering on the detected local maximum data to obtain a relatively smooth maximum curve u maxL (t);
Filling the maximum curve u maxL (t) with a sinusoidal signal having a frequency fL to generate a single-frequency sinusoidal signal u L (t) having an amplitude u maxL (t) and a frequency fL, wherein the single-frequency sinusoidal signal u L (t) is a frequency component below the wide frequency band.
5. A method according to claim 3, wherein said obtaining frequency components above said wide frequency band in said target wide frequency signal comprises:
filtering the target broadband signal by adopting a high-pass filter to obtain a high-frequency component of the target broadband signal; the cut-off frequency of the high-pass filter is the upper frequency limit fH of the broadband;
Carrying out local maximum detection on the signal with the absolute value of the high-frequency component of the target broadband signal;
carrying out low-pass filtering on the detected local maximum data to obtain a relatively smooth maximum curve u maxH (t);
Filling the maximum curve u maxH (t) with a sinusoidal signal having a frequency fH, and generating a single-frequency sinusoidal signal u H (t) having an amplitude u maxH (t) and a frequency fH, wherein the single-frequency sinusoidal signal u H (t) is a frequency component above the wide frequency band.
6. The method of claim 1, further comprising, prior to driving the broadband vibration device based on the broadband vibration signal and the pulsed vibration signal:
carrying out local maximum detection on the signal with the absolute value of the target broadband signal;
Carrying out low-pass filtering on the detected local maximum data to obtain a relatively smooth maximum curve u maxP (t);
Filling a maximum curve u maxP (t) by using a sinusoidal signal with the frequency of fP to generate a single-frequency sinusoidal signal u P (t) with the amplitude of u maxP (t) and the frequency of fP, wherein the single-frequency sinusoidal signal u P (t) is an intensity enhancement component;
Linearly superposing the intensity enhancement component and the pulse vibration signal to form a new pulse vibration signal;
Driving the broadband vibration device according to the broadband vibration signal and the pulse vibration signal, including:
and driving the broadband vibration device according to the broadband vibration signal and the new pulse vibration signal.
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