Vibration device and vibration method

Abstract

This vibration device is provided with: a glass plate structure provided with at least one glass plate; a vibration output unit fixed to the glass plate forming body and configured to vibrate the glass plate forming body according to an input signal; a detection unit for detecting the sound or vibration emitted by the glass plate component and outputting a detection signal corresponding to the detection result; a signal output unit that outputs an arbitrary audio signal; and a control unit that has a controller that generates a correction signal in which the acoustic signal is corrected so that the detection signal corresponds to the acoustic signal, and that inputs the correction signal from the controller to the vibration output unit.

Description

Technical Field

[0001] The technology disclosed herein relates to a vibration device and a vibration method. Background Art

[0002] It is known that the technology of vibrating a glass plate to improve the acoustic characteristics is known (International Publication No. 2019 / 172076).

[0003] The speaker device described in International Publication No. 2019 / 172076 includes: a vibration plate (e.g., a glass plate, a light-transmitting ceramic, etc.) having light transmittance; an exciter (vibrator) generating vibrations; and a vibration transmission unit connected to the vibration plate and the exciter to transmit the vibrations from the exciter to the vibration plate. The loss coefficient of the vibration plate at 25°C is 1×10 －2 Above, the specific modulus of the vibration transmission part is 20mm 2 / s 2 As described above, the acoustic performance is maintained, and the design of the diaphragm is not impaired, thereby exhibiting excellent appearance design.

[0004] In addition, there is known a device that reduces indoor noise by detecting sound from a noise source and outputting sound having a phase opposite to that of the detected sound (Japanese Patent Application Laid-Open No. 9-288489).

[0005] In the noise reduction device disclosed in Japanese Patent Application Laid-Open No. 9-288489, a first microphone disposed in a vehicle interior outputs an acoustic signal of a frequency of detected noise, and based on the acoustic signal, a sound having the same amplitude and opposite phase as the detected noise is generated from a speaker disposed on a headrest toward the vehicle interior as an anti-phase sound (secondary sound). On the other hand, a second microphone disposed near the speaker detects residual noise in the vehicle interior, and inputs the detected detection signal to a control unit. Based on the acoustic signal and the detection signal, the control unit updates the coefficient of the adaptive filter using an adaptive algorithm in such a way that the detection signal is minimized, and controls the anti-phase sound output from the speaker.

[0006] According to this noise reduction device, the noise heard by the occupant in the vehicle cabin can be reduced by outputting the reverse phase sound of the noise from the speaker built into the headrest.

[0007] In addition, a noise device as described below is known, which comprises: a vibration output unit that vibrates a window glass plate that separates an indoor space from an outdoor space; a feedforward microphone that detects a noise source / vibration source that is correlated with the sound wave vibration caused by the glass plate, and outputs a reference signal corresponding to the detection result; a feedback microphone that detects the sound in the indoor space and outputs an error signal corresponding to the detection result; and ANC processing, which has a filter that generates an elimination signal with a phase opposite to the reference signal in a manner that minimizes the error signal, and outputs the elimination signal to the vibration output unit (US2018 / 0082673A).

[0008] In the noise device of US2018 / 0082673A, a cancelling interference signal is generated for use in active noise cancellation in an interior setting of an indoor space. Summary of the invention

[0009] Thus, the speaker device described in International Publication No. 2019 / 172076 discloses that an intermediate layer is provided between a pair of substrates (e.g., glass plates), and that a high loss coefficient can be achieved when the intermediate layer is liquid, and better vibration transmission can be obtained when the thickness is reduced. In addition, Japanese Patent Publication No. 9-288489 and US2018 / 0082673A do not disclose a technology for reducing noise in a vehicle interior space.

[0010] On the other hand, when the glass plate is enlarged, the influence of the inertial force becomes greater, so there is a problem of reduced signal reproducibility when the input signal rises and falls. In addition, the glass vibration plate that excites the large and massive glass plate has the problem of suppressing the driving noise generated by the exciter. For example, when a speaker device is used as a vibration (sound) generating unit, if it is set between the indoor and outdoor of a vehicle or building, etc., it may not be possible to obtain sufficient vibration performance depending on the outside temperature. This is caused by the temperature dependence of the vibration frequency characteristics of the glass vibration plate. If the temperature becomes low, the attenuation decreases and the glass vibration plate is easy to resonate. If the temperature becomes high, the attenuation of the glass vibration plate increases and the transient response decreases, so the desired performance may not be obtained. Therefore, a function of correcting the vibration behavior of the glass vibration plate is required.

[0011] Therefore, an object of the technology disclosed in the present invention is to provide a vibration device and a vibration method using a glass diaphragm that can output a sound that is faithful to an acoustic signal.

[0012] A first aspect of the present disclosure is a vibration device, wherein:

[0013] have:

[0014] A glass plate structure having at least one glass plate;

[0015] A vibration output unit is fixed to the glass plate structure and causes the glass plate structure to vibrate according to an input signal;

[0016] A detection unit that detects the sound or vibration emitted by the glass plate structure and outputs a detection signal corresponding to the detection result;

[0017] A signal output unit, outputting an arbitrary sound signal; and

[0018] The control unit includes a controller that generates a correction signal for correcting the sound signal so that the detection signal corresponds to the sound signal, and inputs the correction signal from the controller to the vibration output unit.

[0019] The second aspect of the present disclosure is a vibration method,

[0020] According to the input signal, a glass sheet structure having at least one glass sheet is vibrated by a vibration output unit fixed to the glass sheet structure, wherein:

[0021] detecting the sound or vibration emitted by the glass plate structure and outputting a detection signal corresponding to the detection result,

[0022] Output any sound signal,

[0023] having a controller for generating a correction signal for correcting the sound signal in such a manner that the detection signal corresponds to the sound signal, and inputting the correction signal from the controller to the vibration output unit,

[0024] The glass sheet constituting body is vibrated by the vibration output unit according to the correction signal.

[0025] According to one aspect of the present disclosure, it is possible to provide a vibration device and a vibration method using a glass diaphragm that can output a sound that is faithful to an acoustic signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of a vehicle to which the vibration device according to the first embodiment is applied.

[0027] Figure 2 This is a schematic structural diagram of a vehicle door to which a vibration device is applied.

[0028] Figure 3 This is a front view of the vibration device for explaining the structure of the vibration device.

[0029] Figure 4 It is along Figure 3 A cross-sectional view taken along line IV-IV is shown.

[0030] Figure 5 It is a partial cross-sectional view showing a state where a vibration output unit is mounted on a glass sheet structure.

[0031] Figure 6 This is a functional block diagram of a vibration device applied to a vehicle.

[0032] Fig. 7A This is a diagram showing a vibration waveform of a glass sheet structure when an acoustic signal is output without being corrected.

[0033] Figure 7B This is a diagram showing a vibration waveform of a glass sheet structure when an acoustic signal is corrected and output.

[0034] Fig. 8A FIG. 1 is a diagram showing a configuration example of a series-connected controller constituting an adaptive filter.

[0035] Figure 8B FIG. 1 is a diagram showing a configuration example of a parallel-connected controller constituting an adaptive filter.

[0036] Fig. 9 This is a schematic structural diagram of a vehicle door equipped with a vibration device of another structure.

[0037] Fig.10 This is a functional block diagram of a vibration device of other structure.

[0038] Fig.11 This is a functional block diagram of a vibration device of other structure.

[0039] Fig.12 This is a functional block diagram of a vibration device of other structure.

[0040] Fig.13 It is a schematic diagram of a vibration device according to a second embodiment provided in a door of a vehicle.

[0041] Fig.14 It is along Fig.13 A schematic cross-sectional view taken along line III-III is shown.

[0042] Fig.15 This is a functional block diagram of a vibration device applied to a vehicle.

[0043] Fig.16 It is a schematic cross-sectional view showing the structure of a glass diaphragm.

[0044] Fig.17 Yes means Fig.16 A schematic cross-sectional view of a glass diaphragm showing another arrangement example of the temperature adjustment unit shown.

[0045] Fig.18A Is based on the configuration in Fig.13 FIG. 1 is an explanatory diagram of a temperature adjustment region of a temperature adjustment portion of a glass diaphragm shown in FIG.

[0046] Fig.18B Is based on the configuration in Fig.13 FIG. 1 is an explanatory diagram of a temperature adjustment region of a temperature adjustment portion of a glass diaphragm shown in FIG.

[0047] Fig.18C Is based on the configuration in Fig.13 FIG. 1 is an explanatory diagram of a temperature adjustment region of a temperature adjustment portion of a glass diaphragm shown in FIG.

[0048] Fig.18D Is based on the configuration in Fig.13 FIG. 1 is an explanatory diagram of a temperature adjustment region of a temperature adjustment portion of a glass diaphragm shown in FIG.

[0049] Fig.19 This is a partial cross-sectional view showing a structure in which a heat-ray reflecting layer is provided on a glass vibration plate.

[0050] Fig. 20 This is a partial cross-sectional view showing a structure in which the thickness of one glass plate of a glass diaphragm is made thinner than the thickness of the other glass plate.

[0051] Fig.21 It is a cross-sectional view showing another configuration example of the glass diaphragm.

[0052] Fig. 22 It is a top view of a vehicle showing a location where a glass diaphragm is applied to the vehicle.

[0053] Fig.23 This is a schematic diagram showing an example in which a glass diaphragm is applied to a window of a house. DETAILED DESCRIPTION

[0054] Hereinafter, a configuration example of the technology disclosed in the present invention will be described in detail with reference to the drawings.

[0055] The technology disclosed in the present invention realizes good sound quality in low-frequency bands and mid-high-frequency bands by excitation of a glass vibration plate with signal correction. In the following embodiments, a glass plate structure used as a glass vibration plate is described as an example of a vehicle window or a residential window, but the application object is not limited to this. In addition, in the following description, "glass vibration plate" refers to a general term for a structure including a vibration output unit 13 installed in a glass plate structure 11 described later.

[0056] <First embodiment>

[0057] Figure 1 1 is a schematic structural diagram of a vehicle S to which a vibration device is applied. Figure 21 is a schematic structural diagram of a door D of a vehicle S to which a vibration device is applied.

[0058] like Figure 1 As shown, the vibration device is assembled in the vehicle S, and radiates sound to the outside and inside of the vehicle S.

[0059] like Figure 1 and Figure 2 As shown, the vibration device includes a glass plate structure 11, a vibration output unit 13, a sound output device 1, an indoor sound detection unit 3, and a control unit 5. The vibration output unit 13, the sound output device 1, and the indoor sound detection unit 3 are respectively connected to the control unit 5. In addition, in the vehicle S, sound speakers 7 constituting an audio system are installed indoors, and these sound speakers 7 are also connected to the control unit 5.

[0060] The glass plate structure 11 is provided in a door D of a vehicle S and is used as a front side window FSW for partitioning an interior space of the vehicle S from an exterior space.

[0061] The vibration output unit 13 is, for example, a voice coil motor, and is attached to the glass plate structure 11. The vibration output unit 13 vibrates in response to a drive signal input from the control unit 5, and applies the vibration to the glass plate structure 11.

[0062] The sound output device 1 is, for example, an audio reproduction device. The sound output device 1 outputs an arbitrary sound signal. Specifically, the sound output device 1 is installed in the interior of the vehicle S, and the sound signal is sent to the control unit 5.

[0063] The indoor sound detection unit 3 is, for example, a microphone, which is installed in the interior of the vehicle S to detect indoor sound. The indoor sound detection unit 3 is preferably arranged near the indoor glass plate structure 11 and the ear of the passenger, or is worn on the ear of the passenger. In the case of being worn on the ear of the passenger, a wireless microphone is more preferably used. The signal of the sound detected by the indoor sound detection unit 3 is sent to the control unit 5 as a detection signal.

[0064] In addition, the door D of the vehicle S having the glass plate structure 11 has an inclusion member 15 that supports the glass plate structure 11. The region of the glass plate structure 11 to which the vibration output unit 13 is fixed is accommodated inside the inclusion member 15. The inclusion member 15 has an opening 21, and the region of the glass plate structure 11 to which the vibration output unit 13 is not fixed is exposed to the outside from the opening 21. The inclusion member 15 has a shielding member 17 at the opening 21, and the shielding member 17 acoustically shields the opening 21 from the glass plate structure 11.

[0065] Here, the basic structure of the vibration device is described.

[0066] Figure 3 This is a front view of the vibration device for explaining the structure of the vibration device. Figure 4 It is along Figure 3 A cross-sectional view taken along line IV-IV is shown. Figure 5 It is a partial cross-sectional view showing a state where the vibration output unit 13 is attached to the glass sheet structure 11 .

[0067] like Figure 3 and Figure 4 As shown in FIG. 1 , the glass plate structure 11 is supported by the inclusion member 15. The glass plate structure 11 is excited by the vibration generated by the vibration output portion 13 to generate sound. Figure 4 When the glass plate structure 11 is viewed in the direction of arrow Va, the glass plate structure 11 may have light transmittance that allows the back side to be seen through the glass plate structure 11, or may have light blocking properties or optical filters such as bandpass filters, or selective light transmittance such as a surface treatment layer that forms the surface into a light diffusion surface. When the glass plate structure 11 is a single plate (single plate glass), a dimming film may be provided on the surface of the single plate glass, or when the glass plate structure 11 is a laminated glass described later, a dimming film may be provided between a plurality of intermediate layers.

[0068] The glass plate structure 11 includes at least one glass plate. It is preferably a so-called laminated glass including a plurality of glass plates and an intermediate layer disposed between the glass plates. Figure 5 As shown, the glass plate structure 11 of this example is composed of a pair of glass plates 73 and 75 stacked together, and an intermediate layer 71 is included between these glass plates 73 and 75. The glass plate structure 11 is preferably made of a material with a high longitudinal wave sound velocity value, for example, glass, light-transmitting ceramics, sapphire and other single crystals, etc. can be used. The glass plate structure 11 has an external shape that matches the front side window FSW of the vehicle S, but is not limited to this, and may also have other external shapes such as a rectangle.

[0069] The vibration output unit 13 is fixed to the glass plate structure 11, and vibrates the glass plate structure 11 according to the input drive signal. The vibration output unit 13 is configured to include a coil unit, a magnetic circuit unit, and an excitation unit connected to the coil unit or the magnetic circuit unit. In the vibration output unit 13, if the drive signal from the control unit 5 is input to the coil unit, the coil unit or the magnetic circuit unit vibrates due to the interaction between the coil unit and the magnetic circuit unit. The vibration of the coil unit or the magnetic circuit unit is transmitted to the excitation unit, and then transmitted from the excitation unit to the glass plate structure 11.

[0070] At least one vibration output unit 13 is mounted on the glass plate structure 11. Alternatively, two vibration output units 13 may be mounted on one main surface of the glass plate structure 11 at a distance from each other along one side of the outer edge of the glass plate structure 11. Figure 4As shown in FIG. 1 , the vibration output parts 13 are provided on one main surface and the other main surface of the glass sheet structure 11 .

[0071] The inclusion member 15 included in the door D of the vehicle S is formed in a box shape surrounding a portion of the glass plate structure 11 including the fixed position of the vibration output unit 13. The inclusion member 15 defines an internal space 19 including the vibration output unit 13 and a portion of the glass plate structure 11. The other portion of the glass plate structure 11 is exposed to the outside of the internal space 19 from an opening 21 formed in the internal space 19 of the inclusion member 15. That is, a portion of the glass plate structure 11 is exposed to the outside of the internal space 19 from the opening 21 of the internal space 19.

[0072] The shielding member 17 provided in the opening 21 of the inclusion member 15 makes the internal space 19 a closed space, and divides the glass plate structure 11 into an excitation area A1 inside the internal space 19 where the vibration output unit 13 is provided and a vibration area A2 outside the internal space 19 .

[0073] As the shielding member 17, all polymer materials of hydrocarbon composition, silicone composition, fluorine composition and all rubber can be used. However, it is preferred that the storage modulus G of the dynamic viscoelasticity of a sheet formed into a thickness of 1 mm measured at 25°C, a frequency of 1 Hz and a compression mode is 1.0×10 2 ~1.0×10 10 Pa, preferably a material with a storage modulus G of 1.0×10 3 ~1.0×10 8 The shielding member 17 is not completely fixed to the glass plate structure 11, but is in contact with the glass plate structure 11 to allow a slight movement of 1 mm or less. This prevents sound leakage from the internal space 19.

[0074] In this structure, a support member 23 for supporting the glass plate structure 11 on the inclusion member 15 is provided between the bottom of the internal space 19 of the inclusion member 15 or between a driving mechanism (not shown) provided in the internal space 19 for raising and lowering the glass plate structure 11 and a part of the excitation area A1 of the glass plate structure 11. The support member 23 is made of an elastic sheet material having a cushioning property, such as rubber, felt, sponge, or the like.

[0075] The glass sheet structure 11 is relatively movable with respect to the enclosure member 15 by the driving mechanism (not shown). That is, the window of the vehicle S can be opened and closed by moving the front side window FSW formed by the glass sheet structure 11.

[0076] like Figure 3As shown, when the direction in which the glass plate structure 11 protrudes from the internal space 19 inside the inclusion member 15 to the outside of the internal space 19 is set as the first direction Ax1, and the direction in the plate surface orthogonal to the first direction is set as the second direction Ax2, it is preferred that the maximum width Lw of the second direction Ax2 of the glass plate structure 11 is greater than the maximum width Lh of the first direction Ax1 (Lw≧Lh). Thus, in the vibration area A2 of the glass plate structure 11, the distance from the vibration output unit 13 arranged in the excitation area A1 of the glass plate structure 11 does not become too long over the entire surface of the vibration area A2, and the vibration from the vibration output unit 13 is propagated to the vibration area A2 with sufficient strength.

[0077] According to the above structure, Figure 4 As shown, the glass plate structure 11 is divided by the shielding member 17 into an excitation area A1 in which the vibration output unit 13 is installed and arranged in the internal space 19 of the inclusion member 15, and a vibration area A2 arranged outside the internal space 19 and contributing to sound radiation. Therefore, the sound generated from the excitation area A1 due to the vibration from the vibration output unit 13 is attenuated in the internal space 19. In addition, the opening 21 of the internal space 19 and the glass plate structure 11 are acoustically shielded by the shielding member 17, so that the sound generated from the excitation area A1 in the internal space 19 is suppressed from leaking to the outside of the internal space 19.

[0078] That is, when the vibration of the vibration output unit 13 of the excitation area A1 propagates to the vibration area A2 and radiates sound from the vibration area A2, it is possible to suppress the sound (noise) generated in the excitation area A1 from overlapping with the sound from the vibration area A2. That is, a continuous glass plate structure 11 is divided into the excitation area A1 and the vibration area A2, and the excitation area A1 is divided into the internal space 19 by the inclusion component 15 and the shielding component 17. Thus, the noise generated from the excitation area A1 is sealed in the internal space 19, the sound is suppressed from leaking from the internal space 19, and the useless noise generated from the excitation area A1 due to the vibration of the vibration output unit 13 is suppressed from being transmitted to the sound receiver as airborne sound. As a result, the reduction in directivity caused by the surround of the sound can be suppressed. In addition, since the sound is radiated only from the vibration area A2 of the glass plate structure 11 to the surroundings, the sound pressure distribution based on the sound radiation can be made uniform.

[0079] Here, when the area of ​​the excitation region A1 of the glass sheet structure 11 is Ss and the area of ​​the vibration region is Sv, the area ratio Ss / Sv is preferably 0.01 to 1.0, more preferably 0.02 to 0.5, and further preferably 0.05 to 0.1.

[0080] If the area of ​​the excitation region A1 is too large compared to the area of ​​the vibration region A2, the efficiency of generating sound pressure may be reduced, and if it is too small, effective excitation driving may not be achieved. Therefore, by forming the area ratio within the above range, sound radiation from the vibration region A2 corresponding to the vibration of the vibration output unit 13 can be performed with high efficiency.

[0081] In addition, the total area of ​​the glass plate structure 11 (the area of ​​one main surface of the glass plate) is preferably 0.04 m 2 More preferably 0.10m 2 More preferably, 0.30 m 2 By setting the total area of ​​the glass sheet structure 11 to be equal to or larger than the above area, the above-mentioned effects of uniforming the sound pressure distribution and suppressing the decrease in directivity by dividing into the excitation area A1 and the vibration area A2 can be easily obtained.

[0082] Figure 6 1 is a functional block diagram of a vibration device applied to a vehicle S.

[0083] like Figure 6 As shown, the control unit 5 includes a transfer function correction unit 31, an adaptive algorithm 33, an adaptive filter 35, and an amplifier 37. Although not shown, the control unit 5 is composed of a microcomputer including a processor such as a CPU, memories such as ROM and RAM, a storage device, and the like.

[0084] The adaptive algorithm 33 and the adaptive filter 35 generate a correction signal for correcting the sound signal sent from the sound output device 1. The adaptive algorithm 33 and the adaptive filter 35 generate a correction signal for correcting the sound signal in such a way that the detection signal sent from the indoor sound detection unit 3 corresponds to the sound signal. The correction signal generated by the adaptive algorithm 33 and the adaptive filter 35 is amplified by the amplifier 37 and sent to the vibration output unit 13. In the adaptive algorithm 33, for example, the error between the detection signal and the sound signal is estimated by the least square method. In the adaptive filter 35, the filter coefficient is appropriately updated by the adaptive algorithm 33 according to the error level between the detection signal and the sound signal.

[0085] The transfer function correction unit 31 obtains a transfer function of a secondary path, which is a transfer path of an acoustic signal between the glass plate structure 11 to which the vibration output unit 13 as a secondary sound source is attached and the indoor sound detection unit 3. Based on the transfer function, the transfer function correction unit 31 sets the parameters of the adaptive algorithm 33 so that the phase of the detection signal from the indoor sound detection unit 3 is synchronized with the phase of the acoustic signal from the sound output device 1.

[0086] In the vehicle S equipped with the vibration device, the vibration device operates to send an arbitrary sound signal from the sound output device 1 to the control unit 5. In addition, the indoor sound detection unit 3 detects indoor sound, and the detection result is sent to the control unit 5 as a detection signal.

[0087] When the acoustic signal and the detection signal are sent to the control unit 5, the transfer function correction unit 31 of the control unit 5 obtains the transfer function in the transmission path of the acoustic signal between the sound output device 1 and the indoor sound detection unit 3. Then, based on the transfer function, the phase of the detection signal from the indoor sound detection unit 3 is synchronized with the phase of the acoustic signal from the sound output device 1.

[0088] Here, since the mass (inertia) of the glass sheet structure 11 is large, Fig. 7A As shown in the figure, the reproducibility of the input signal is low when the signal input is rising and just after it is cut off. Fig. 7A , there is shown an example in which a delay occurs in the output input signal waveform (dashed line) corresponding to the detection signal of the indoor sound detection unit 3 compared to the waveform (solid line) of the input signal of the vibration device that is faithful to the sound signal.

[0089] Therefore, in this embodiment, the adaptive algorithm 33 and the adaptive filter 35 of the control unit 5 generate a correction signal that corrects the sound signal in such a way that the detection signal sent from the indoor sound detection unit 3 corresponds to the sound signal. Figure 7B As shown in FIG. 1 , a correction signal is generated in such a way that the reproducibility of the input signal at the time of the rise of the signal input and immediately after the cutoff is improved. Figure 7B , an example of a waveform of a correction signal (solid line) and an output signal waveform (dashed line) identical to the input signal of the vibration device is shown. The correction signal is sent to the amplifier 37, amplified by the amplifier 37, and sent to the vibration output unit 13. The amplifier 37 can use a voltage feedback amplifier or a current feedback amplifier, but in order to obtain good responsiveness, it is preferable to use a current feedback amplifier.

[0090] Specifically, the adaptive filter 35 is configured as follows: Fig. 8A The controller shown is obtained by connecting the feedforward controller Gff(s) and the feedback controller Gfb(s) in series.

[0091] More specifically, the acoustic signal, i.e., the target value r(s), is used as the input of the feedforward controller Gff(s), and the deviation (s) between the output of the feedforward controller Gff(s) and the detection signal of the indoor sound detection unit 3, i.e., the output y(s) (measurement signal), is used as the input of the feedback controller Gfb(s). The output of the feedback controller Gfb(s), i.e., the control input u(s), is output to the vibration output unit 13, i.e., the control object P(s).

[0092] Specifically, the adaptive filter 35 can also be configured as Figure 8B The controller shown is obtained by connecting the feedforward controller Gff(s) and the feedback controller Gfb(s) in parallel.

[0093] More specifically, the sound signal, i.e., the target value r(s), is used as the input of the feedforward controller Gff(s), and the deviation (s) between the sound signal, i.e., the target value r(s), and the detection signal, i.e., the output y(s) (measurement signal) of the indoor sound detection unit 3 is used as the input of the feedback controller Gfb(s). Furthermore, the control input u(s), which is the sum of the output of the feedback controller Gfb(s) and the output of the feedforward controller Gff(s), is output to the vibration output unit 13, i.e., the control object P(s).

[0094] The vibration output unit 13 generates vibrations corresponding to the transmitted correction signal, thereby vibrating the glass sheet structure 11 to which the vibration output unit 13 is attached. Therefore, the vibrations generated in the glass sheet structure 11 by the vibrations of the vibration output unit 13 can output sounds that are faithful to the acoustic signal.

[0095] Next, another configuration example of the vibration device will be described.

[0096] Fig. 9 1 is a schematic structural diagram of a door D of a vehicle S equipped with a vibration device of another structure.

[0097] like Fig. 9 As shown, the vibration device includes an internal space sound detection unit 8 composed of a microphone in an internal space 19 of an inclusion member 15 that includes an excitation area A1 of a glass plate structure 11 to which a vibration output unit 13 is installed. In addition, an auxiliary speaker 9 is provided in the internal space 19. These internal space sound detection unit 8 and auxiliary speaker 9 are connected to the control unit 5, respectively.

[0098] The internal space sound detection unit 8 detects the vibration sound from the excitation area A1 of the glass plate structure 11 caused by the vibration of the vibration output unit 13, and sends it as an error signal to the control unit 5. The control unit 5 generates a cancellation signal for minimizing the error signal from the internal space sound detection unit 8 through the adaptive algorithm 33 and the adaptive filter 35 based on the error signal from the internal space sound detection unit 8, and outputs the cancellation sound to the auxiliary speaker 9. Then, by outputting the cancellation sound from the auxiliary speaker 9, the vibration sound from the excitation area A1 of the glass plate structure 11 caused by the vibration of the vibration output unit 13 in the internal space 19 is canceled.

[0099] Thus, according to the vibration device according to another embodiment, the vibration output unit 13 can vibrate the glass plate structure 11 to output a sound that is faithful to the acoustic signal, and cancel the secondary noise generated by the vibration of the vibration output unit 13. As a result, in the interior of the vehicle S, a sound that is more faithful to the acoustic signal can be output.

[0100] In addition, in order to cancel the sound caused by the vibration of the vibration output unit 13, an auxiliary speaker 9 that outputs the cancellation sound is provided in the internal space 19, but the output method of the cancellation sound is not limited to this. For example, it is also possible to configure that the cancellation sound that cancels the sound generated by the vibration of the vibration output unit 13 is output from the vibration output unit 13, and it is also possible to configure that the auxiliary speaker 9 and the vibration output unit 13 are used together.

[0101] A sound-absorbing material such as felt or sponge may also be attached to the inside or outside of the inclusion component 15. In this case, the sound-absorbing effect in the internal space 19 is improved. Specifically, as the sound-absorbing material, a porous sound-absorbing material or a resonance-type sound-absorbing material based on a perforated plate or the like is preferred. From the perspective of the frequency band that can absorb sound, a porous sound-absorbing material is more preferred. In addition, the sound absorption rate of the sound-absorbing material at normal incidence at 1kHz is preferably 0.25 or more, more preferably 0.5 or more, and further preferably 0.75 or more. The thickness of the sound-absorbing material is preferably 0.5 mm or more and 20 mm or less, and more preferably a thickness of 1 mm or more and 10 mm or less. The surface to which the sound-absorbing material is attached is preferably 25% or more of the area of ​​the internal space 19 surrounding the inclusion component 15, and more preferably 50% or more.

[0102] Fig.10 This is a functional block diagram of another configuration example of the vibration device.

[0103] With the above Figure 6 Compared with the configuration example of , an acceleration sensor 53 provided on the surface of the glass plate structure 11 is used instead of the indoor sound detection unit 3. In this configuration example, similarly to the indoor sound detection unit 3, the output of the acceleration sensor 53 is sent to the control unit 5 as a detection signal.

[0104] Fig.11 , Fig.12 This is a functional block diagram of another configuration example of the vibration device.

[0105] The responsiveness of the glass sheet structure 11 changes according to the air temperature. This is because the vibration attenuation characteristics (loss coefficient) of the glass sheets of the glass sheet structure 11 and the intermediate layer (adhesive layer or fluid layer described later) in the case of laminated glass change with temperature changes. Therefore, in this configuration example, in order to correct the performance difference caused by temperature changes, the parameters of the adaptive algorithm 33 are set according to the temperature of the glass sheet structure 11.

[0106] Specifically, if Fig.11 , Fig.12 As shown, a temperature sensor 200 provided on the surface of the glass plate structure 11 is used. The transfer function correction unit 31 obtains a transfer function for each temperature of the glass plate structure 11, and sets the parameters of the adaptive algorithm 33 based on the transfer function. The temperature sensor 200 can also be a sensor provided at a location other than the surface of the glass plate structure 11. For example, the temperature sensor can also be provided in direct contact with the intermediate layer. In addition, an outside temperature meter provided on the inner side around the front grille or a room temperature meter provided in the vehicle interior can also be used. In this case, the temperature of the intermediate layer of the glass plate structure can also be estimated by referring to the data of a plurality of temperature sensors.

[0107] The adaptive algorithm 33 and the adaptive filter 35 generate a correction signal for correcting the sound signal received from the sound output device 1 using the parameters of the adaptive algorithm 33 corresponding to the temperature detected by the temperature sensor 200 .

[0108] [Second Embodiment]

[0109] Next, a vibration device according to a second embodiment will be described. However, the same reference numerals are given to the same components as those of the first embodiment, and description thereof will be omitted.

[0110] Fig.13 1 is a schematic diagram of a vibration device installed in a door D of a vehicle S.

[0111] The vibration device includes a glass plate structure 11 , a vibration output unit 13 attached to the glass plate structure 11 , and a temperature adjustment unit 330 for adjusting the temperature of the glass plate structure 11 .

[0112] Fig.14 It is along Fig.13 A schematic cross-sectional view taken along line III-III is shown.

[0113] The inclusion member 15 has an opening 21, and the glass plate structure 11 protrudes from the opening 21. The glass plate structure 11 is provided with at least one vibration output unit 13.

[0114] The temperature adjustment unit 330 includes a heating element for adjusting the temperature of the intermediate layer of the glass sheet structure 11 or a structure having a heat-retaining function. Fig.14As shown, the temperature adjustment unit 330 may be provided on one side or both sides of the glass plate structure 11. The temperature adjustment unit 330 may also be configured to heat, cool, or keep the intermediate layer warm based on the temperature of the glass plate structure 11, surrounding components, or ambient atmosphere detected by a sensor unit (not shown) and in accordance with a command signal from the control unit 315.

[0115] The inclusion member 15 is formed into a box shape that surrounds the portion of the glass plate structure 11 where the vibration output unit 13 and the temperature adjustment unit 330 are arranged. A shielding member 17 is provided at the opening 21 of the inclusion member 15. The shielding member 17 makes the internal space 19 of the inclusion member 15 a closed space and acoustically shields the opening 21 from the glass plate structure 11. In addition, the glass plate structure 11 is divided into an excitation area A1 inside the internal space 19 where the vibration output unit 13 is provided and a vibration area A2 outside the internal space 19.

[0116] In other words, the excitation area A1 can be said to be an area of ​​the plate surface of the glass plate structure 11 except for the portion exposed to the outside from the internal space 19 of the inclusion member 15. That is, the inclusion member 15 exposes one end of the glass plate structure 11 to the outside of the internal space 19 from the opening 21 of the internal space 19. Here, the one end of the glass plate structure 11 refers to the end of the glass plate structure 11 on the fixed position side close to the vibration output part 13 and the temperature adjustment part 330 and the end of the glass plate structure 11 on the fixed position side away from the vibration output part 13 and the temperature adjustment part 330.

[0117] The sound signal output by the sound output device 1 is sent to the control unit 315 .

[0118] <Vibration Control>

[0119] Fig.15 is a functional block diagram of a vibration device applied to a vehicle S. Fig.15 , the control of the vibration device is explained.

[0120] The control unit 315 is composed of a microcomputer including a processor such as a CPU, a memory such as a ROM and a RAM, and a storage device. The sound output device 1 sends a sound signal to the control unit 315. In addition, the indoor sound detection unit 3 detects indoor sound, and the indoor sound detection result is sent to the control unit 315 as a detection signal.

[0121] The control unit 315 includes a transfer function correction unit 31 , an adaptive algorithm 33 , an adaptive filter 35 , and an amplifier 37 , similarly to the control unit 5 of the first embodiment. The control unit 315 also controls the temperature adjustment unit 330 .

[0122] <Structure of glass diaphragm>

[0123] Next, the structure of the glass plate structure 11 used in the above-mentioned vibration device will be described.

[0124] Fig.16 It is a schematic cross-sectional view showing the structure of the glass sheet structure 11 .

[0125] In the glass plate structure 11, the first glass plate 73 and the second glass plate 75 are arranged opposite to each other, and the intermediate layer 71 is provided between the first glass plate 73 and the second glass plate 75. Here, the case where the first glass plate 73 is arranged on the indoor side of the vehicle S and the second glass plate 75 is arranged on the outdoor side is described. Hereinafter, the first glass plate 73 and the second glass plate 75 are also referred to as a pair of glass plates 73, 75.

[0126] When the glass plate structure 11 resonates due to the driving of the vibration output unit 13, the intermediate layer 71 of the glass plate structure 11 prevents the resonance of the glass plate structure 11 or attenuates the resonant vibration of the glass plate structure 11. The glass plate structure 11 can improve the loss coefficient due to the presence of the intermediate layer 71 compared with the case where the glass plate structure 11 is composed only of the glass plate structure 11.

[0127] The glass plate structure 11 has a larger loss coefficient, and thus the vibration attenuation is greater. Therefore, the loss coefficient of the glass plate structure 11 at 25° C. is preferably 1×10 －3 More preferably, 2×10 －3 More preferably, 5×10 －3 In addition, since the higher the sound velocity, the higher the reproducibility of high-frequency sound when used as a vibration plate, the longitudinal wave sound velocity value in the plate thickness direction of the glass plate structure 11 is preferably 4.0×10 3 m / s or more, more preferably 4.5×10 3 m / s or more, more preferably 5.0×10 3 m / s or more. The upper limit is not particularly limited, but is preferably 7.0×10 3 Below m / s.

[0128] The glass sheet structure 11 has the intermediate layer 71, so that the glass sheet structure 11 obtains a high loss coefficient and a high longitudinal wave sound velocity value. A high loss coefficient means that the vibration damping ability is high.

[0129] The loss coefficient uses the value calculated by the half-width method. When the frequency width at the point where the material's resonant frequency f and amplitude h drops by -3 dB, i.e., the point at which the maximum amplitude is -3 [dB], is set to W, the value represented by {W / f} is defined as the loss coefficient. In order to suppress resonance, it is sufficient to increase the loss coefficient. Here, suppressing resonance means making the frequency width W relatively larger relative to the amplitude h, thereby widening the peak.

[0130] The loss coefficient is a value specific to a material, etc., and in the case of single-plate glass, for example, it varies depending on its composition, relative density, etc. The loss coefficient can be measured by a dynamic elastic modulus test method such as a resonance method.

[0131] The longitudinal wave sound velocity value refers to the speed at which the longitudinal wave propagates in the vibration plate. The longitudinal wave sound velocity value and Young's modulus can be measured by the ultrasonic pulse method described in Japanese Industrial Standards (JIS-R1602-1995).

[0132] Fig.17 Yes means Fig.16 A schematic cross-sectional view of a glass diaphragm showing another arrangement example of the temperature adjustment unit shown.

[0133] For the temperature adjustment unit 330, Fig.16 As shown, it can be arranged between the first glass plate 73 and the intermediate layer 71, as shown in FIG. Fig.17 As shown, the temperature control unit 330 may be disposed outside the first glass plate 73, or outside each of the first glass plate 73 and the second glass plate 75. In addition, the temperature control unit 330 may be disposed in the excitation region A1, in both the excitation region A1 and the vibration region A2, or only in the vibration region A2.

[0134] FIG. 18A to FIG. 18D 1 is an explanatory diagram showing a temperature adjustment region F by a temperature adjustment unit 330 disposed in the glass sheet structure 11. FIG. 18A to FIG. 18D In FIG. 1 , the area (temperature adjustment area F) where the temperature adjustment unit 330 is arranged is indicated by the oblique line, and the position where the shielding member 17 is arranged in the opening 21 of the inclusion member 15 is indicated as the waistline BL. The waistline BL corresponds to the lower side of the opening area (vibration area A2) when the side window is attached to the door D of the vehicle S and is in a fully closed state when the glass plate structure 11 is used as a side window.

[0135] exist Fig.18A In the embodiment, the temperature control area F is set at a position lower than the waistline BL, that is, set in the internal space 19 of the inclusion member 15 (refer to Fig.14). That is, the temperature adjustment area F is provided only in the non-exposed part of the glass plate structure 11. In this case, since the temperature adjustment unit 330 is arranged in the excitation area A1, the vibration characteristics of the glass plate structure 11 can be reliably improved. In addition, since the temperature adjustment unit 330 is housed in a part that is not exposed to the outside, it is not visible to the user, and the appearance design is good. In addition, the temperature adjustment unit 330 is not exposed to the ultraviolet rays and heat rays caused by sunlight, wind and rain, and the temperature adjustment unit 330 is protected. As a result, the aging of the temperature adjustment unit 330 over time can be suppressed.

[0136] exist Fig.18B In the embodiment, the temperature control area F is provided only around the vibration output unit 13 below the waistline BL. In this case, the temperature control area F can be kept to a necessary minimum, and the installation cost of the temperature control unit 330 can be reduced.

[0137] exist Fig.18C In this embodiment, the temperature control region F is provided in both the excitation region A1 and the vibration region A2 of the glass sheet structure 11. In this case, the entire glass sheet structure 11 is maintained at an appropriate temperature, and the vibration characteristics can be kept well.

[0138] exist Fig.18D In this embodiment, the temperature control region F is provided only in the exposed portion above the waistline BL of the glass sheet structure 11. In this case, the vibration characteristics of the vibration region A2 become good.

[0139] As described above, the temperature adjustment region F can be appropriately selected according to its purpose of use, performance, sound insulation, and the like.

[0140] As the temperature adjustment unit 330, a heating body, a material or structure having a heat-insulating function, etc. can be cited. In the case of heating, a heating body such as a hot wire, a conductive film, an electronic device, etc. is used to heat the middle layer 71, and in the case of heat-insulating, the middle layer 71 is made to follow the temperature inside the vehicle. In addition, in the case of cooling, an electronic cooling element such as a Peltier element can be used. In the case of using a Peltier element, heating and cooling can be selectively controlled, and the temperature adjustment range is expanded.

[0141] As the heating body, there are conductive wires, transparent conductive films (ITO), thin film heaters, etc. The conductive wire is a hot wire heater, which can be set on the entire surface of the glass plate, or only in various areas such as the excitation area A1 below the waistline BL. Transparent conductive films and thin film heaters are both surface heaters with a heating surface, which can be set in various areas similar to the case of the conductive wire, and can heat a large area efficiently. In addition, the Peltier element can be configured only in the excitation area A1 below the waistline BL. In addition, by providing a heating body on both sides of the glass vibration plate, the responsiveness of the temperature adjustment can be improved.

[0142] In the case of heat insulation, examples include a structure in which a heat insulating layer is provided on a glass plate, and a structure in which the thickness of a glass plate is reduced to increase the thermal conductivity of heat conducted to the intermediate layer 71 .

[0143] Fig.19 This is a partial cross-sectional view showing a structure in which a heat-ray reflecting layer is provided on a glass vibration plate.

[0144] Fig.19 The glass plate structure 11 shown is provided with a heat reflection layer 45 between the intermediate layer 71 and the second glass plate 75. The heat reflection layer 45 plays a role in suppressing the heat input Q1 of the indoor side from escaping to the outdoor side through the first glass plate 73 and the intermediate layer 71, and returning the heat to the indoor side as reflected heat Q2. Thus, the heat of the indoor side can be used to efficiently keep the intermediate layer 71 warm. The heat reflection layer 45 can be formed by, for example, forming a film of a material such as an ITO film or an FTO film.

[0145] In addition, the heat reflection layer 45 functions as a heat insulation layer that suppresses the heat input Q1 introduced into the intermediate layer 71 from escaping to the outside. As another example of such a heat insulation layer, an air layer can be exemplified. In this way, the heat insulation layer such as the heat reflection layer 45 becomes the temperature adjustment unit 330 that adjusts the temperature of the intermediate layer 71 using the indoor ambient temperature.

[0146] Fig. 20 This is a partial cross-sectional view showing a structure in which the thickness of one glass plate of a glass diaphragm is made thinner than the thickness of the other glass plate.

[0147] for Fig. 20 For the glass sheet structure 11 shown in FIG. 1 , the thickness t of the first glass sheet 73 on the indoor side is in Than the thickness t of the second glass plate 75 on the outdoor side out Thin (t in <t out ).

[0148] According to this structure, when the heat Q on the indoor side is introduced into the intermediate layer 71 through the first glass plate 73, since the first glass plate 73 is thin, the heat absorption by the first glass plate 73 can be suppressed, and the heat input to the intermediate layer 71 is increased. in =αt out When , the coefficient α can be set in the range of 0.0<α<1.0, preferably 0.2≦α≦0.8, and more preferably 0.5≦α≦0.7.

[0149] That is, the temperature of the intermediate layer 71 can be made to follow the temperature of the indoor side of the vehicle S in a short time. When the outside temperature is low, the intermediate layer 71 is heated by the heat Q of the indoor temperature higher than the outside temperature, and when the outside temperature is high, the intermediate layer 71 is made close to the indoor temperature lower than the outside temperature. That is, the intermediate layer 71 becomes easily affected by the indoor temperature. In this way, the combination of the first glass plate 73 and the second glass plate 75 having the optimized plate thickness structure functions as the temperature adjustment unit 330.

[0150] Fig.21 It is a cross-sectional view showing another configuration example of the glass diaphragm.

[0151] Fig.21 The glass plate structure 11 shown has a layer of the temperature regulating portion 330 disposed on the inner side of the first glass plate 73, a resin layer 47 disposed between the layer of the temperature regulating portion 330 and the second glass plate 75, and a fluid layer 44 such as a gel, a liquid phase (e.g., liquid crystal) disposed between the resin layers 47. The pair of resin layers 47 can be composed of a resin film that seals the fluid layer 44. The fluid layer 44 and the pair of resin layers 47 constitute an intermediate layer 49.

[0152] However, the resin film, like the solid intermediate layer 71, has a reduced vibration attenuation at low temperatures, and is more likely to resonate. In addition, when the temperature rises to above room temperature (e.g., above 40° C.), the attenuation characteristics are improved. Therefore, the glass plate structure 11 is also provided with a temperature control unit 330, so that the attenuation of the resin layer 47 is increased, and the glass plate structure 11 can be effectively excited.

[0153] The glass plate structure 11 described above is not limited to being applied to Figure 1 Side window of vehicle S shown.

[0154] Fig. 22 It is a top view of a vehicle showing a portion where the glass sheet structure 11 is applied to the vehicle.

[0155] like Fig. 22 As shown, the glass plate structure 11 can be provided at the rear side window RSW, the front windshield WS, the rear window RW, the sunroof RG, etc. in addition to the front side window FSW. In addition, in the above, an example is shown in which a part of the front side window FSW is enclosed by the enclosing member 15, but when the window glass other than the front side window FSW is used as a glass vibration plate, the enclosing member 15 may or may not exist.

[0156] For example, in the case where the glass plate structure 11 is a rear window RW, by configuring a vibration output unit 13 such as an exciter on the main surface of the interior of the vehicle near the roof in a manner overlapping with a shielding layer such as black ceramic that blocks visible light, visibility from the outside can be improved. For example, in the case where the vibration output unit 13 is configured near the roof of the rear window RW, one (a total of 2) can also be provided at each end in the vehicle width direction along the boundary line between the rear window RW and the roof. In this case, the vibration output unit 13 can also be installed on the inside of the vehicle, and it is also provided with an enclosing component 15 that covers the vibration output unit 13 and encloses it in a manner that divides the internal space. In this way, in the above-mentioned embodiments, as an example of a slidable glass plate structure 11 of a vehicle, it is not limited to the front side window FSW, the rear side window RSW, etc., and can also be applied to a fixed window such as the rear window RW of the vehicle that is fixed (so-called fixed installation).

[0157] The vibration device is composed of these glass plates 11, Figure 1 The sound output device 1 shown is composed of the indoor sound detection unit 3 and the control unit 315.

[0158] In addition, the application of the glass plate structure 11 to the vehicle S is not limited to sound output, and can also be used as a vehicle window, structural component, or decorative plate that improves hydrophobicity, water sliding, snow resistance, ice resistance, and anti-fouling properties through sound wave vibration. Specifically, in addition to automobile window glass, reflectors, and flat or curved plate-shaped components installed in the vehicle, it can also be used as a lens, a sensor, and their cover glass. In addition, it can also be used as an external speaker for the purpose of radiating sound to the outside of the vehicle.

[0159] Furthermore, the vibration device can be applied to rail vehicles other than the above-mentioned automobiles, and can be applied to windows of airplanes, windows of ships, etc., and windows of buildings such as houses other than the vehicle S.

[0160] Fig.23 This is a schematic diagram showing an example in which the glass plate structure 11 is applied to a window of a house.

[0161] like Fig.23 As shown in FIG. 1 , a glass plate structure 11 and a window frame WF supporting the glass plate structure 11 are provided in a window WD of a house. A vibration output unit 13 is installed in a portion of the surface of the glass plate structure 11 disposed in the inner space of the window frame WF. The vibration output unit 13 may be one or more. In addition, a temperature control unit 330 is installed in at least a portion of the glass plate structure 11. The temperature control unit 330 is preferably as follows: Fig.18A As shown in the example, it is arranged in the inner space of the window frame WF, but it can also be arranged as shown in the example. Figures 18B to 18D The temperature adjustment area F is appropriately changed as shown in the example.

[0162] In this way, if the vibration device including the glass plate structure 11 is applied to the window WD for housing, the glass plate structure 11 whose temperature is adjusted by the temperature adjustment unit 330 can be vibrated by the vibration output unit 13, and sound faithful to the acoustic signal can be output.

[0163] In addition, functions such as infrared blocking, ultraviolet blocking, and coloring can be provided to the glass plate structure 11. Thus, a structure with improved functionality can be formed according to the application.

[0164] Examples of applications of the vibration device to the above-mentioned buildings include, in addition to window glass, door glass, ceiling glass, interior parts, exterior parts, decorative parts, structural parts, outer walls, and cover glass for solar cells. Moreover, it can also be used as partitions, mirror tables, etc. in banks, hospitals, hotels, restaurants, offices, etc. They can also function as sound reflection (echo) panels and sound absorbing panels. In addition, through sound wave vibration, the hydrophobicity, snow resistance, and anti-fouling properties of the glass plate structure 11 can be improved.

[0165] The internal space 19 provided in the enclosure member 15 may be provided in other parts such as the vehicle body other than the vehicle door panel, or in a window frame member, a wall portion, etc. among building members.

[0166] The vibration device described above can be used in parts for electronic devices in addition to moving objects such as vehicles and windows of buildings. For example, as parts for electronic devices, it can be used in full-range speakers, speakers for bass reproduction in the frequency band of 15Hz to 200Hz, speakers for high-frequency reproduction in the frequency band of 10kHz to 100kHz, and speakers with a vibration plate area of ​​0.2m 2 The above large speakers, flat speakers, cylindrical speakers, transparent speakers, cover glass for electronic devices that function as speakers, cover glass for TV displays, screen films, displays that generate image signals and voice signals from the same surface, electro-optical displays, lighting fixtures, etc. The speakers can be used for music or alarm sounds. In addition, if a vibration detection element such as an acceleration sensor is added, it can also be used as a vibration plate or vibration sensor for a microphone.

[0167] <Glass plate>

[0168] The glass plate structure 11 used in the glass plate structure 11 refers to inorganic glass and organic glass. As organic glass, PMMA resin, PC resin, PS resin, PET resin, cellulose resin, etc., which are generally known as transparent resins, are used.

[0169] In addition to the pair of glass plate structures 11 sandwiching the intermediate layer 71, other glass plates may be laminated. The other glass plates may be the above-mentioned inorganic glass or organic glass. Instead of the glass plates, resin plates formed of resins other than organic glass, metal plates such as aluminum, ceramic plates formed of ceramics, etc. may be used. Specifically, as materials of other metal plates replacing glass plates, aluminum, magnesium, copper, silver, gold, iron, titanium, SUS, etc. may be cited, and other alloy materials may also be used as needed.

[0170] At least one of the glass plates constituting the glass plate structure 11 may be a physically strengthened glass plate or a chemically strengthened glass plate. This is useful for preventing the glass plate from being damaged. In order to improve the strength of the glass plate, the glass plate located on the outermost surface of the plurality of glass plates may be formed into a physically strengthened glass plate or a chemically strengthened glass plate, and preferably all the glass plates constituting the vibration device are physically strengthened glass plates or chemically strengthened glass plates.

[0171] In addition, as the glass plate, from the aspect of improving the longitudinal wave sound velocity value and strength, it is also useful to use crystallized glass or phase-separated glass. In particular, when the strength of the glass plate is to be improved, it is preferred that the glass plate located on the outermost surface of the plurality of glass plates is formed into crystallized glass or phase-separated glass.

[0172] As the resin material constituting the glass plate, preferably, a resin material that can be formed into a flat plate shape or a curved plate shape is used. In addition, as a composite material or a fiber material, preferably, a resin material, a carbon fiber, a Kevlar fiber, etc., which is compounded with a high-hardness filler is used.

[0173] The composition of the glass plate is not particularly limited, but is preferably in the following range, for example: SiO2: 40-80 mass%, Al2O3: 0-35 mass%, B2O3: 0-15 mass%, MgO: 0-20 mass%, CaO: 0-20 mass%, SrO: 0-20 mass%, BaO: 0-20 mass%, Li2O: 0-20 mass%, Na2O: 0-25 mass%, K2O: 0-20 mass%, TiO2: 0-10 mass%, and ZrO2: 0-10 mass%. The above composition accounts for 95 mass% or more of the entire glass.

[0174] The composition of the glass plate expressed in mol % based on oxides is more preferably in the following range.

[0175] SiO2: 55-75 mass%, Al2O3: 0-25 mass%, B2O3: 0-12 mass%, MgO: 0-20 mass%, CaO: 0-20 mass%, SrO: 0-20 mass%, BaO: 0-20 mass%, Li2O: 0-20 mass%, Na2O: 0-25 mass%, K2O: 0-15 mass%, TiO2: 0-5 mass%, and ZrO2: 0-5 mass%. The above composition accounts for more than 95 mass% of the entire glass.

[0176] <Specific example of the structure of the middle layer>

[0177] The intermediate layer 71 between the plurality of mutually stacked glass plate structures 11 is preferably a solid phase, but as described above, it may be a fluid layer composed of a fluid such as a gel or a liquid such as a liquid crystal between a pair of resin layers.

[0178] (Solid phase intermediate layer)

[0179] As the solid phase intermediate layer 71, polyvinyl butyral (PVB), ethylene vinyl acetate copolymer resin (EVA), polyurethane, polyethylene terephthalate, polycarbonate, etc. suitable for use as an intermediate film of laminated glass can be cited. In the case where the intermediate layer 71 is composed of a resin layer, the thickness can be exemplified in the range of 0.3 mm to 3.0 mm, can be in the range of 0.3 mm to 2.0 mm, or can be in the range of 0.3 mm to 1.0 mm. In addition, the thickness of the intermediate layer 71 does not need to be uniform, and the thickness can also be distributed in a manner that optimizes the sound pressure frequency characteristics of the glass plate structure 11. For example, the intermediate layer 71 can also be a wedge shape whose thickness has a distribution that gradually increases in a certain direction.

[0180] like Fig.21 As described in , for the glass plate structure 11, when the intermediate layer 49 includes a resin, if the frequency characteristics vary depending on the temperature, the sound pressure and phase will be disturbed, and the active control performance will be significantly reduced. Resin has a glass transition temperature, and the glass transition temperature of the resin material used is substantially low. That is, if it is above the glass transition temperature, the frequency characteristics become good. However, if the temperature rises too much, the rigidity of the plate decreases, and effective excitation cannot be performed.

[0181] Therefore, the temperature regulating unit 330 can realize the glass sheet structure 11 with good frequency characteristics by controlling the temperature of the intermediate layers 71 and 49 to be equal to or higher than the glass transition temperature of the resin material and equal to or lower than 50° C., preferably equal to or lower than 45° C., and more preferably equal to or lower than 40° C.

[0182] (Fluid Layer)

[0183] The glass plate structure 11 may also be provided with a fluid layer containing a liquid in the intermediate layer between at least a pair of glass plate structures 11. In this case, a high loss coefficient can be achieved. Among them, by forming the viscosity and surface tension of the fluid layer into an appropriate range, the loss coefficient can be further improved. It is believed that this is caused by the following reasons, that is, unlike the case where a pair of glass plate structures 11 are provided via an adhesive layer, a pair of glass plate structures 11 are not fixed, and the vibration characteristics of each glass plate structure 11 are continuously brought. In addition, the "fluid" mentioned in this specification refers to liquids, semi-solids, liquid crystals, mixtures of solid powders and liquids, substances in which liquids are impregnated in solid gels (jelly-like substances), and all substances with fluidity containing liquids are included in its meaning.

[0184] The fluid layer preferably has a viscosity coefficient of 1×10 －4 ~1×10 3 Pa·s, and the surface tension at 25°C is 15 to 80 mN / m. If the viscosity is too low, it is difficult to transmit vibrations. If it is too high, the pair of glass plate structures 11 located on both sides of the fluid layer are fixed to each other and exhibit vibration behavior as one glass plate structure 11, so the resonant vibration is not easy to attenuate. In addition, if the surface tension is too low, the adhesion between the glass plate structures 11 is reduced, and it is difficult to transmit vibrations. If the surface tension is too high, the pair of glass plate structures 11 located on both sides of the fluid layer are easily fixed to each other, and exhibit vibration behavior as one glass plate structure 11, so the resonant vibration is not easy to attenuate.

[0185] The fluid layer is chemically stable, and preferably does not react with a pair of glass plate structures 11 located on both sides of the fluid layer. Chemical stability means that, for example, there is little deterioration (deterioration) due to light, or at least in the temperature range of -20 to 70°C, there is no solidification, gasification, decomposition, discoloration, chemical reaction with glass, etc.

[0186] As the components of the fluid layer, specifically, water, oil, organic solvent, liquid polymer, ionic liquid and mixtures thereof can be cited. More specifically, propylene glycol, dipropylene glycol, tripropylene glycol, linear silicone oil (dimethyl silicone oil, methylphenyl silicone oil, methyl hydrogen silicone oil), modified silicone oil, acrylic polymer, liquid polybutadiene, glycerol paste, fluorine solvent, fluorine resin, acetone, ethanol, xylene, toluene, water, mineral oil and mixtures thereof can be cited. Among them, it is preferred to contain at least one selected from propylene glycol, dimethyl silicone oil, methylphenyl silicone oil, methyl hydrogen silicone oil and modified silicone oil, and more preferably propylene glycol or silicone oil as the main component.

[0187] In this way, the technology disclosed in the present invention is not limited to the above-mentioned embodiments. Combining the structures of the embodiments with each other and making changes and applications based on the description in the specification and known technologies by those skilled in the art are also intended by the technology disclosed in the present invention and are included in the scope of the protection requested.

[0188] As described above, this specification discloses the following matters.

[0189] (1) A vibration device, wherein:

[0190] have:

[0191] A glass plate structure having at least one glass plate;

[0192] A vibration output unit is fixed to the glass plate structure and causes the glass plate structure to vibrate according to an input signal;

[0193] A detection unit that detects the sound or vibration emitted by the glass plate structure and outputs a detection signal corresponding to the detection result;

[0194] A signal output unit, outputting an arbitrary sound signal; and

[0195] The control unit includes a controller that generates a correction signal for correcting the sound signal so that the detection signal corresponds to the sound signal, and inputs the correction signal from the controller to the vibration output unit.

[0196] According to the vibration device, by detecting the sound or vibration emitted by the glass plate structure, a correction signal is generated by correcting the sound signal in a manner that makes the detection signal corresponding to the detection result correspond to an arbitrary sound signal, and the correction signal is input to the vibration output part that vibrates the glass plate structure, thereby being able to output a sound that is faithful to the sound signal.

[0197] (2) The vibration device according to (1), wherein:

[0198] further comprising a temperature detection unit for detecting the temperature of the glass sheet structure,

[0199] The control unit has control parameters of the controller for each temperature of the glass sheet structure.

[0200] The control unit generates the correction signal by the controller using a control parameter of the controller corresponding to the temperature of the glass sheet constituent detected by the temperature detection unit.

[0201] According to this vibration device, even if the temperature of the glass sheet structure changes, it is possible to output a sound that is faithful to the acoustic signal.

[0202] (3) The vibration device according to (1) or (2), wherein:

[0203] The control unit generates the correction signal through an adaptive algorithm and an adaptive filter.

[0204] The adaptive filter uses the target value of the acoustic signal as an input of a feedforward controller, and uses the deviation between the output of the feedforward controller and the detection signal as an input of a feedback controller.

[0205] According to this vibration device, a sound faithful to an acoustic signal can be output using a feedforward controller and a feedback controller.

[0206] (4) The vibration device according to (1) or (2), wherein:

[0207] The control unit generates the correction signal through an adaptive algorithm and an adaptive filter.

[0208] The adaptive filter uses the target value of the sound signal as the input of the feedforward controller and uses the deviation between the sound signal and the detection signal as the input of the feedback controller.

[0209] The sum of the output of the feedback controller and the output of the feedforward controller is output to the vibration output unit.

[0210] According to this vibration device, a sound faithful to an acoustic signal can be output using a feedforward controller and a feedback controller.

[0211] (5) The vibration device according to any one of (1) to (4), wherein:

[0212] The invention further includes an enclosure member that defines an internal space surrounding the vibration output unit fixed to the glass plate structure and exposes a portion of the glass plate structure to the outside of the internal space from an opening of the internal space.

[0213] According to this vibration device, the vibration output part fixed to the glass sheet structure is arranged inside the internal space partitioned by the inclusion member. Thus, it is possible to suppress leakage of noise from the internal space.

[0214] (6) The vibration device according to (5), wherein:

[0215] The inclusion member is a window frame member that supports the glass plate structure so as to be stretchable.

[0216] According to this vibration device, when the glass sheet structure serving as the window glass is closed, the transmission of noise from the outside to the inside of the room through the window can be stably suppressed regardless of the ambient temperature.

[0217] (7) The vibration device according to any one of (1) to (6), wherein:

[0218] The glass sheet structure includes a temperature adjustment unit for adjusting the temperature.

[0219] According to this vibration device, by adjusting the temperature of the glass sheet structure using the temperature adjustment unit, the influence of temperature on the attenuation and frequency characteristics of the glass sheet structure can be reduced, and the glass sheet structure can be stably vibrated with desired vibration characteristics.

[0220] (8) The vibration device according to (7), wherein:

[0221] further comprising an enclosure member that defines an internal space surrounding the vibration output unit fixed to the glass plate structure and exposes a portion of the glass plate structure to the outside of the internal space from an opening of the internal space,

[0222] The temperature adjustment section is provided in a region of the plate surface of the glass plate structure excluding a portion exposed to the outside from the internal space of the enclosure member.

[0223] According to this vibration device, the temperature adjustment unit cannot be seen by the user, and the appearance design is good.

[0224] In addition, it is possible to suppress the temperature adjustment unit from being exposed to the ambient atmosphere.

[0225] (9) The vibration device according to (7) or (8), wherein:

[0226] The glass plate structure is a laminated glass having a first glass plate, a second glass plate, and an intermediate layer sandwiched between the first glass plate and the second glass plate.

[0227] The temperature adjustment unit includes a heating body for heating the intermediate layer.

[0228] According to this vibration device, the temperature of the intermediate layer can be adjusted by heating by the temperature adjustment unit.

[0229] (10) The vibration device according to any one of (7) to (9), wherein:

[0230] The temperature adjustment section is disposed on both surfaces of the glass sheet structure.

[0231] According to this vibration device, the temperature of the glass sheet structure can be adjusted from both sides, and the responsiveness of the temperature adjustment is improved.

[0232] (11) The vibration device according to any one of (7) to (10), wherein:

[0233] The glass plate structure is a laminated glass having a first glass plate, a second glass plate, and an intermediate layer sandwiched between the first glass plate and the second glass plate.

[0234] The temperature adjustment portion has the heat-insulating function of the intermediate layer.

[0235] According to this vibration device, the temperature of the intermediate layer can be regulated by heat preservation by the temperature regulating unit. In addition, the temperature can be regulated by utilizing the temperature in the room.

[0236] (12) The vibration device according to (11), wherein:

[0237] The temperature adjustment unit includes a heat insulating layer covering at least a portion of the intermediate layer.

[0238] According to this vibration device, the heat insulation layer suppresses the release of heat, thereby suppressing a temperature drop.

[0239] (13) The vibration device according to (12), wherein:

[0240] The heat insulating layer is a heat reflecting layer.

[0241] According to this vibration device, the heat-reflecting layer improves the heat-retaining efficiency of the intermediate layer.

[0242] (14) The vibration device according to (11) or (12), wherein:

[0243] By making one of the first glass sheet and the second glass sheet thinner than the other, heat input from the temperature regulating part to the intermediate layer is increased.

[0244] According to this vibration device, heat absorption by the thin-walled glass sheet is suppressed, and heat input to the intermediate layer through the thin-walled glass sheet is increased. As a result, heat can be taken into the intermediate layer without waste.

[0245] (15) The vibration device according to any one of (11) to (14), wherein:

[0246] The intermediate layer is made of a resin material including any one of polyvinyl butyral, ethylene-vinyl acetate copolymer resin, polyurethane, polyethylene terephthalate, and polycarbonate.

[0247] According to this vibration device, the temperature of the intermediate layer made of the resin material having a large temperature dependency of the frequency characteristics is accurately adjusted by the temperature adjustment unit.

[0248] (16) The vibration device according to (15), wherein:

[0249] The temperature adjustment unit sets the temperature of the intermediate layer to a temperature not less than the glass transition temperature of the resin material and not more than 50° C.

[0250] According to this vibration device, it is possible to suppress the resonance of the glass sheet structure caused by temperature and to perform efficient vibration.

[0251] (17) The vibration device according to any one of (1) to (16), wherein:

[0252] The glass plate structure is at least one of a side window, a rear window, a windshield, and a sunroof of a vehicle.

[0253] According to this vibration device, a sound faithful to the acoustic signal can be output from a glass panel structure provided at a side window, a rear window, a windshield, a sunroof, or the like of a vehicle.

[0254] (18) The vibration device according to any one of (1) to (16), wherein:

[0255] The glass sheet structure is a window of any one of a railway vehicle, an airplane, a ship, and a building.

[0256] According to this vibration device, it is possible to output a sound that is faithful to the acoustic signal from a glass panel structure provided in a window of any one of a railway vehicle, an airplane, a ship, and a building.

[0257] (19) A vibration method, comprising vibrating a glass sheet structure having at least one glass sheet by means of a vibration output unit fixed to the glass sheet structure in accordance with an input signal,

[0258] detecting the sound or vibration emitted by the glass plate structure and outputting a detection signal corresponding to the detection result,

[0259] Output any sound signal,

[0260] having a controller for generating a correction signal for correcting the sound signal in such a manner that the detection signal corresponds to the sound signal, and inputting the correction signal from the controller to the vibration output unit,

[0261] The glass sheet constituting body is vibrated by the vibration output unit according to the correction signal.

[0262] According to this vibration method, by detecting the sound or vibration emitted by the glass plate structure, a correction signal is generated by correcting the sound signal in a manner that makes the detection signal corresponding to the detection result correspond to an arbitrary sound signal, and the correction signal is input to a vibration output unit that vibrates the glass plate structure, thereby being able to output a sound that is faithful to the sound signal.

[0263] The entire disclosure of Japanese Patent Application No. 2022-083970 is incorporated into this specification by reference.

[0264] All documents, patent applications, and technical standards described in this specification are incorporated herein by reference as if each document, patent application, or technical standard was specifically and individually described as being incorporated by reference.

Claims

1. A vibration device, wherein: have: A glass plate structure having at least one glass plate; a vibration output unit fixed to the glass plate structure and causing the glass plate structure to vibrate according to an input signal; a detection unit that detects the sound or vibration emitted by the glass plate structure and outputs a detection signal corresponding to the detection result; A signal output unit, outputting any sound signal; as well as The control unit includes a controller that generates a correction signal for correcting the acoustic signal so that the detection signal corresponds to the acoustic signal, and inputs the correction signal from the controller to the vibration output unit.

2. The vibration device according to claim 1, wherein further comprising a temperature detection unit for detecting the temperature of the glass sheet constituent body, The control unit has control parameters of the controller for each temperature of the glass sheet structure. The control unit generates the correction signal by the controller using a control parameter of the controller corresponding to the temperature of the glass sheet constituent detected by the temperature detection unit.

3. The vibration device according to claim 1 or 2, wherein: The control unit generates the correction signal through an adaptive algorithm and an adaptive filter. The adaptive filter uses the target value of the acoustic signal as an input of a feedforward controller, and uses the deviation between the output of the feedforward controller and the detection signal as an input of a feedback controller.

4. The vibration device according to claim 1 or 2, wherein: The control unit generates the correction signal through an adaptive algorithm and an adaptive filter. The adaptive filter uses the target value of the sound signal as the input of the feedforward controller and uses the deviation between the sound signal and the detection signal as the input of the feedback controller. The sum of the output of the feedback controller and the output of the feedforward controller is output to the vibration output unit.

5. The vibration device according to any one of claims 1 to 4, wherein: The invention further includes an enclosure member that defines an internal space surrounding the vibration output unit fixed to the glass plate structure and exposes a part of the glass plate structure to the outside of the internal space from an opening of the internal space.

6. The vibration device according to claim 5, wherein: The inclusion member is a window frame member that supports the glass plate structure so as to be stretchable.

7. The vibration device according to any one of claims 1 to 6, wherein: The glass sheet structure includes a temperature adjustment unit for adjusting temperature.

8. The vibration device according to claim 7, wherein: further comprising an enclosure member that defines an internal space surrounding the vibration output unit fixed to the glass plate structure and exposes a portion of the glass plate structure to the outside of the internal space from an opening of the internal space, The temperature adjustment unit is provided in a region of the plate surface of the glass plate structure excluding a portion exposed to the outside from the internal space of the inclusion member.

9. The vibration device according to claim 7 or 8, wherein: The glass plate structure is a laminated glass having a first glass plate, a second glass plate, and an intermediate layer sandwiched between the first glass plate and the second glass plate. The temperature adjustment unit includes a heating body that heats the intermediate layer.

10. The vibration device according to any one of claims 7 to 9, wherein: The temperature adjustment unit is disposed on both surfaces of the glass sheet structure.

11. The vibration device according to any one of claims 7 to 10, wherein: The glass plate structure is a laminated glass having a first glass plate, a second glass plate, and an intermediate layer sandwiched between the first glass plate and the second glass plate. The temperature adjustment portion has the heat-insulating function of the intermediate layer.

12. The vibration device according to claim 11, wherein The temperature adjustment portion includes a heat insulating layer covering at least a portion of the intermediate layer.

13. The vibration device according to claim 12, wherein: The heat insulation layer is a heat ray reflecting layer.

14. The vibration device according to claim 11 or 12, wherein: By making one of the first glass sheet and the second glass sheet thinner than the other, heat input from the temperature regulating section to the intermediate layer is increased.

15. The vibration device according to any one of claims 11 to 14, wherein: The intermediate layer is composed of a resin material including any one of polyvinyl butyral, ethylene-vinyl acetate copolymer resin, polyurethane, polyethylene terephthalate, and polycarbonate.

16. The vibration device according to claim 15, wherein: The temperature adjustment unit sets the temperature of the intermediate layer to a temperature not less than the glass transition temperature of the resin material and not more than 50° C.

17. The vibration device according to any one of claims 1 to 16, wherein: The glass plate structure is at least any one of a side window, a rear window, a windshield, and a sunroof of a vehicle.

18. The vibration device according to any one of claims 1 to 16, wherein: The glass sheet structure is a window of any one of a railway vehicle, an airplane, a ship, and a building.

19. A vibration method, comprising vibrating a glass sheet structure having at least one glass sheet by a vibration output unit fixed to the glass sheet structure according to an input signal, wherein: detecting the sound or vibration emitted by the glass plate structure and outputting a detection signal corresponding to the detection result, Output any sound signal, having a controller for generating a correction signal for correcting the sound signal in such a manner that the detection signal corresponds to the sound signal, and inputting the correction signal from the controller to the vibration output unit, The glass sheet constituent body is vibrated by the vibration output unit according to the correction signal.

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