CN118010146A - Sound restoration device and method thereof - Google Patents
Sound restoration device and method thereof Download PDFInfo
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- CN118010146A CN118010146A CN202410129049.0A CN202410129049A CN118010146A CN 118010146 A CN118010146 A CN 118010146A CN 202410129049 A CN202410129049 A CN 202410129049A CN 118010146 A CN118010146 A CN 118010146A
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- 230000005540 biological transmission Effects 0.000 claims abstract description 8
- 238000012544 monitoring process Methods 0.000 claims description 16
- 238000001914 filtration Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 abstract description 5
- 230000009467 reduction Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
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- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention belongs to the field of laser equipment, and discloses a sound restoration device and a sound restoration method. Comprises a laser, a first spectroscope and a demodulation device; the laser is used for emitting laser to the sound target to be measured; the first spectroscope is positioned on the laser light path of the emergent laser and is arranged at an included angle with the laser light path, the transmission surface of the first spectroscope is arranged corresponding to the laser, and the reflection surface of the first spectroscope is used for receiving the reflected laser on the acoustic target to be detected; the demodulation device is arranged corresponding to the reflecting surface and is used for demodulating the reflected laser into sound information. In the sound restoration device provided by the invention, the demodulation device acquires the reflected laser on the sound target to be detected so as to acquire the vibration information on the sound target to be detected, and the sound restoration is carried out according to the vibration information, so that the detection restoration of remote sound can be realized, the remote sound is not easy to be disturbed, and other components are not required to be arranged on the sound site.
Description
Technical Field
The invention relates to the technical field of laser equipment, in particular to a sound restoration device and a sound restoration method.
Background
In the field of production or public security, there is often a need to monitor and collect remote sound, in the prior art, when the remote sound collection is required, the monitoring distance is often limited, and a corresponding acquisition device is required to be installed at a target.
In the prior art, recording equipment such as a microphone is often adopted for recording, so that sound collection is realized. However, it should be noted that such devices generally require a device such as a microphone to be placed in close proximity and operated, and thus long-distance collection of sound cannot be achieved; or sound wave detection devices such as sonar are adopted to listen to remote sound, but the equipment is difficult to restore the remote sound and has poor listening effect. Therefore, in the prior art, it is difficult to achieve remote collection of sound.
Disclosure of Invention
The invention mainly aims to provide a sound restoration device and a sound restoration method, which aim to solve the problem that sound cannot be acquired in a long distance.
In order to achieve the above object, the present invention provides a sound reproducing apparatus including:
the laser is used for emitting laser to the sound target to be measured;
The first spectroscope is positioned on the laser light path of the emergent laser and forms an included angle with the laser light path, the transmission surface of the first spectroscope is arranged corresponding to the laser, and the reflection surface of the first spectroscope is used for receiving the reflected laser on the acoustic target to be detected; and
And the demodulation device is arranged corresponding to the reflecting surface and is used for demodulating the reflected laser into sound information.
Optionally, an included angle between the first beam splitter and the laser light path is 45 °.
Optionally, the sound reduction device further includes a collimator lens, where the collimator lens is disposed between the laser and the first beam splitter and is located on the laser path of the emitted laser.
Optionally, the sound reduction device further includes a concave lens, and the concave lens is disposed on a side of the first beam splitter away from the laser, and is located on the laser path.
Optionally, the sound reduction device further includes an alignment structure, where the alignment structure is used to monitor a position of the outgoing laser on the sound target to be measured.
Optionally, the alignment structure comprises a monitoring camera.
Optionally, the alignment structure further includes a second beam splitter, where the second beam splitter is disposed on a side of the first beam splitter away from the laser, and the second beam splitter is located on the laser path, and a reflection surface of the second beam splitter is disposed towards the laser;
The monitoring camera is positioned on one side of the transmission surface of the second beam splitter.
Optionally, the laser light path includes a first light path section between the laser and the second beam splitter and a second light path section reflected by the second beam splitter;
The monitoring camera is on the reverse extension of the second light path segment.
Optionally, the sound reduction device further includes an exit primary mirror, where the exit primary mirror is disposed corresponding to the laser, and the laser path is formed between the exit primary mirror and the laser.
The invention also provides a sound restoration method, which comprises the sound restoration device according to any one of the above, and comprises the following steps:
Emitting laser to an acoustic target to be detected;
obtaining reflected laser on an acoustic target to be detected;
and filtering, amplifying and demodulating the reflected laser to obtain the sound at the periphery of the sound target to be detected.
In the sound reduction device provided by the invention, the laser emits laser to the sound target to be detected, the laser reflects on the sound target to be detected, when sound is generated around the sound target to be detected, the sound target to be detected can vibrate under the action of sound pressure, so that the reflected laser also generates corresponding vibration, the reflected laser carries the vibration information of the sound target to be detected to reflect to the first spectroscope, the reflected laser is reflected to the demodulation device by the first spectroscope, the demodulation device acquires the reflected laser on the sound target to be detected to acquire the vibration information on the sound target to be detected, and sound reduction is carried out according to the vibration information, so that detection reduction of remote sound can be realized, the reflected laser is not easy to be disturbed, and other components are not required to be arranged on a sound site.
Drawings
Fig. 1 is a schematic structural diagram of a sound reproduction apparatus according to an embodiment of the present invention.
Reference numerals illustrate:
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
Referring to fig. 1, the present invention provides a sound reproducing apparatus 100, which includes a laser 1, a first beam splitter 2, and a demodulation device 3; the laser 1 is used for emitting laser to an acoustic target to be detected; the first spectroscope 2 is positioned on the laser light path of the emitted laser and forms an included angle with the laser light path, the transmission surface of the first spectroscope 2 is arranged corresponding to the laser 1, and the reflection surface of the first spectroscope 2 is used for receiving the reflected laser on the sound target to be detected; the demodulation device 3 is disposed corresponding to the reflection surface and is used for demodulating the reflected laser light into sound information.
In the sound restoration device provided by the invention, the laser 1 emits laser light to the sound target to be detected, and generates reflection on the sound target to be detected, when sound is generated around the sound target to be detected, the sound target to be detected can vibrate under the action of sound pressure, so that the reflected laser light also generates corresponding vibration, and the reflected laser light carries vibration information of the sound target to be detected to reflect to the first spectroscope 2, and is reflected to the demodulation device 3 by the first spectroscope 2, the demodulation device 3 acquires the reflected laser light on the sound target to be detected to acquire the vibration information on the sound target to be detected, and sound restoration is performed according to the vibration information, so that detection restoration of remote sound can be realized, and the remote sound is not easy to be disturbed, and other components are not required to be arranged on a sound site.
The demodulation device 3 includes a modem to demodulate and restore the laser signal; the first spectroscope 2 includes a visible light/1550 nm infrared spectroscope.
Further, the angle between the first beam splitter 2 and the laser path is 45 °. In this embodiment, the first spectroscope 2 is disposed at an angle of 45 degrees so as to reflect the reflected laser light on the acoustic target to be detected, ensure the reflection effect, and avoid the laser light from being transmitted into the laser, so that the intensity of the laser light received by the demodulation device 3 is weakened.
On the other hand, the sound reproducing apparatus 100 further includes a collimator lens 4, where the collimator lens 4 is disposed between the laser 1 and the first beam splitter 2 and is located on the laser path of the emitted laser. In this embodiment, after the laser 1 generates the outgoing laser, the outgoing laser is made to pass through the collimator lens 4 to generate a beam of linear laser, so as to irradiate onto the acoustic target to be detected, so as to detect the vibration of the acoustic target to be detected.
On the other hand, the sound reproducing apparatus 100 further includes a concave lens 5, and the concave lens 5 is disposed on a side of the first beam splitter 2 away from the laser 1 and on the laser path. In the present embodiment, after the laser 1 generates laser light, the laser light is condensed and coupled by the concave lens 5.
In another aspect, the sound reduction device 100 further includes an alignment structure for monitoring a position of the outgoing laser light on the sound target to be measured. In this embodiment, in order to ensure that the outgoing laser can accurately irradiate the target to be tested, the sound measurement effect is ensured, and the situation that the sound measurement effect is poor due to misselection of the target is avoided.
It should be noted that, the alignment structure has various embodiments, so long as the alignment adjustment can be performed on the position of the outgoing laser, for example, by means of a preset point location or the like, so that the outgoing laser can be accurately aligned to the acoustic target to be tested.
In particular, in the present invention, the alignment structure includes a monitoring camera 6. In this embodiment, the position of the laser spot irradiated by the emitted laser on the acoustic target to be measured is detected by the monitoring camera 6, and the position acquisition mode is simple and reliable, and no secondary processing of data is required.
The monitoring camera 6 includes a ccd camera, and may accurately strike the laser on the target. And the focal length is adjustable, so that remote sound monitoring and restoring can be realized.
Further, the alignment structure further includes a second beam splitter 7, the second beam splitter 7 is disposed on a side of the first beam splitter 2 away from the laser 1, the second beam splitter 7 is located on the laser light path, and a reflecting surface of the second beam splitter 7 is disposed towards the laser 1; the monitoring camera 6 is located on the transmission surface side of the second beam splitter 7. In this embodiment, the second beam splitter 7 reflects the outgoing laser emitted by the laser 1, so as to change the propagation route of the outgoing laser, and at this time, the monitoring camera 6 is located on the side of the transmission surface of the second beam splitter 7, so that the spot position of the laser can be monitored through the second beam splitter 7, and the position acquisition is more accurate.
In addition, the laser light path includes a first path section between the laser 1 and the second beam splitter 7 and a second path section reflected by the second beam splitter 7; the monitoring camera is on the reverse extension of the second light path segment. In this embodiment, the monitoring camera 6 is disposed on the reverse extension line of the second light path section, so as to accurately determine the position information of the laser.
On the other hand, the sound reproducing apparatus 100 further includes an exit main mirror 8, the exit main mirror 8 is disposed corresponding to the laser 1, and the laser light path is formed between the exit main mirror 8 and the laser 1. In this embodiment, the exit main mirror 8 and the laser 1 together form a complete sound reduction structure, the light emitted by the laser 1 exits from the exit main mirror 8, and the first spectroscope 2 and the demodulation device are both located on the laser light path, so as to protect the first spectroscope 2 and the like.
It should be noted that, the outgoing main mirror 8 is a variable focal lens, so as to collect reflected laser light at different distances.
Based on the above-mentioned sound reproduction apparatus 100, the present invention also provides a sound reproduction method, which includes the steps of:
s10, emitting laser to an acoustic target to be detected;
s20, obtaining reflected laser on an acoustic target to be detected;
And S30, filtering, amplifying and demodulating the reflected laser to obtain the sound on the periphery of the sound target to be detected.
In the sound restoration method provided by the invention, the laser emits laser to the sound target to be detected, the laser returns to the first spectroscope 2 after being reflected and is reflected to the demodulation device, vibration information on the sound target to be detected is obtained through amplification, filtering and adjustment, sound restoration is carried out according to the vibration information, detection restoration of long-distance sound can be realized, and interference is not easy to occur
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (10)
1. A sound reproducing apparatus, comprising:
the laser is used for emitting laser to the sound target to be measured;
The first spectroscope is positioned on the laser light path of the emergent laser and forms an included angle with the laser light path, the transmission surface of the first spectroscope is arranged corresponding to the laser, and the reflection surface of the first spectroscope is used for receiving the reflected laser on the acoustic target to be detected; and
And the demodulation device is arranged corresponding to the reflecting surface and is used for demodulating the reflected laser into sound information.
2. The sound reproduction apparatus of claim 1, wherein the angle between the first beam splitter and the laser beam path is 45 °.
3. The sound reproduction apparatus of claim 1, further comprising a collimator lens disposed between the laser and the first beam splitter and on the laser light path of the outgoing laser light.
4. The sound reproduction apparatus of claim 1, further comprising a concave lens disposed on a side of the first beam splitter remote from the laser and in the laser path.
5. The sound reproduction apparatus of claim 1, further comprising an alignment structure to monitor the position of the outgoing laser light on the sound target to be measured.
6. The sound reproduction apparatus of claim 5, wherein the alignment structure comprises a monitoring camera.
7. The sound reproduction apparatus of claim 6, wherein the alignment structure further comprises a second beam splitter, the second beam splitter being disposed on a side of the first beam splitter remote from the laser, the second beam splitter being disposed on the laser light path, a reflective surface of the second beam splitter being disposed toward the laser;
The monitoring camera is positioned on one side of the transmission surface of the second beam splitter.
8. The sound reproduction apparatus of claim 6, wherein the laser light path includes a first path section between the laser and the second beam splitter and a second path section reflected by the second beam splitter;
The monitoring camera is on the reverse extension of the second light path segment.
9. The sound reproduction apparatus of claim 1, further comprising an exit primary mirror disposed in correspondence with the laser, the exit primary mirror and the laser forming the laser light path therebetween.
10. A sound reproduction method comprising the sound reproduction apparatus according to any one of claims 1 to 9, the sound reproduction method comprising the steps of:
Emitting laser to an acoustic target to be detected;
obtaining reflected laser on an acoustic target to be detected;
and filtering, amplifying and demodulating the reflected laser to obtain the sound at the periphery of the sound target to be detected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410129049.0A CN118010146A (en) | 2024-01-30 | 2024-01-30 | Sound restoration device and method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410129049.0A CN118010146A (en) | 2024-01-30 | 2024-01-30 | Sound restoration device and method thereof |
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| CN118010146A true CN118010146A (en) | 2024-05-10 |
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2024
- 2024-01-30 CN CN202410129049.0A patent/CN118010146A/en active Pending
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