WO2023022418A1 - Caméra acoustique dotée d'un moyen étanche à l'eau - Google Patents

Caméra acoustique dotée d'un moyen étanche à l'eau Download PDF

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Publication number
WO2023022418A1
WO2023022418A1 PCT/KR2022/011725 KR2022011725W WO2023022418A1 WO 2023022418 A1 WO2023022418 A1 WO 2023022418A1 KR 2022011725 W KR2022011725 W KR 2022011725W WO 2023022418 A1 WO2023022418 A1 WO 2023022418A1
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WO
WIPO (PCT)
Prior art keywords
sound wave
substrate
sound
waterproof
front protection
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PCT/KR2022/011725
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English (en)
Korean (ko)
Inventor
김영기
김인권
이광현
오창준
정욱진
Original Assignee
(주)에스엠인스트루먼트
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Priority claimed from KR1020210108416A external-priority patent/KR102566117B1/ko
Priority claimed from KR1020210134561A external-priority patent/KR20230051746A/ko
Application filed by (주)에스엠인스트루먼트 filed Critical (주)에스엠인스트루먼트
Publication of WO2023022418A1 publication Critical patent/WO2023022418A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/02—Bodies
    • G03B17/08—Waterproof bodies or housings
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B29/00—Combinations of cameras, projectors or photographic printing apparatus with non-photographic non-optical apparatus, e.g. clocks or weapons; Cameras having the shape of other objects
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B31/00—Associated working of cameras or projectors with sound-recording or sound-reproducing means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers

Definitions

  • the present invention relates to an acoustic camera equipped with waterproofing means.
  • Registered Patent No. 10-1213540 is a sound sensing device configured to be mounted on a circuit board (Print Circuit Board, 20) and transmitting a signal related to detected sound to a data collection unit;
  • a data collection unit that is connected to the sound sensing device, samples an analog signal related to sound transmitted from the sound sensing device, converts it into a digital signal related to sound, and transmits the analog signal related to sound to a central processing unit, and is connected to the data collection unit,
  • a central processing unit that calculates a noise level related to each MEMS microphone based on the digital signal related to the sound transmitted from the data collection unit, and is connected to the central processing unit, and the noise level calculated by the central processing unit is associated with each MEMS microphone.
  • Post an acoustic camera using a MEMS microphone array characterized in that configured to include a display unit for displaying.
  • a display unit for displaying.
  • Registered Patent No. 10-1471299 (patent holder: SM Instruments Co., Ltd., Hyundai Motor Co., Ltd.) is a front body in which sound sensing parts of MEMS microphones are disposed facing forward; the MEMS microphones in which sound sensing units are exposed to the front body while being fixed to a substrate; a substrate on which the MEMS microphones are mounted; an image capturing unit in which a photographing lens is exposed through the lens hole of the front body; a rear body covering the rear side of the substrate and the rear side of the image capture unit in a state where the substrate is positioned on the rear side of the front body; Disclosed is a movable sound camera comprising a structure, wherein the front body includes a front plate forming a plane, and the front plate and the substrate are disposed in parallel.
  • An object of the present invention is to provide an acoustic camera having excellent sound sensing performance and having a waterproof function so that it can be installed or used in a mobile environment, not indoors.
  • An acoustic camera equipped with a waterproof means of the present invention includes a front protection unit 10 having a plurality of sound wave inlet holes 20 for inducing sound waves or ultrasonic waves to reach the MEMS microphone 20;
  • the MEMS microphones 30 that detect sound waves introduced through the sound wave inlet grooves 11 of the front protection unit 10 while being fixed to a substrate 30; a substrate 40 on which the MEMS microphones 20 are mounted;
  • an image capturing unit 50 for capturing a scene toward which the front protection unit 10 is facing using a photographing lens 41; a rear housing 60 covering the rear of the front protection unit 10; It is characterized in that it is configured to include; a waterproofing unit 70 that blocks water from reaching the MEMS microphone 30 or the substrate 40 through the sound wave inlet hole 20.
  • the waterproof means portion 60 is a sound wave permeable waterproof membrane ( 61).
  • the position of the sound wave permeable waterproof membrane 71 in the front-back direction (FIG. 4) is the front of the front protection part 10, the midpoint of the sound wave inlet hole 20 (the point between the front and rear ends of the sound wave inlet hole), or Preferably, it is provided between the rear surface of the front protection unit 10 and the front surface of the substrate 40 . More preferably, in the sound camera equipped with the waterproof means of the present invention, the waterproof means part 70 is provided between the rear surface of the front protection part 10 and the front surface of the substrate 40 .
  • the width or diameter of the front side (exposure side) of the sound wave inlet hole 20 is larger than that of the rear side (substrate side), and the rear side (substrate side) ) to the front side (exposed side), it is preferable to be composed of an expandable shape in which the cross-sectional area continuously widens.
  • an acoustic camera having excellent sound sensing performance and having a waterproof function is provided so that it can be installed or used in a mobile environment instead of indoors.
  • FIG. 1 is an overall configuration diagram of a sound camera equipped with a waterproofing means according to an embodiment of the present invention.
  • Figure 2a is a front body configuration diagram according to the first embodiment (sound wave inlet hole + waterproofing means) of the present invention
  • Figure 2b is a front body according to the second embodiment (sound wave inlet hole + counterbore + waterproofing means) of the present invention Diagram.
  • Figure 3 (a, b) is a detailed view of the front body according to Figure 2 (a, b) the first and second embodiments of the present invention.
  • FIG 4 is a detailed cross-sectional view of the waterproofing means according to an embodiment of the present invention. (a: before being pressed, b: after being pressed by the substrate)
  • Figure 5 is a front body, waterproof means and substrate coupling (cross-sectional view, cross-sectional detail view) according to the first embodiment of the present invention (sound wave inlet hole + waterproof means).
  • Figure 6 is a front body, waterproof means and substrate coupling (cross-sectional view, cross-sectional detail view) according to the second embodiment (sound wave inlet hole + counter bore + waterproof means) of the present invention.
  • Figure 7 is a front body, waterproof means and substrate coupling (a: before pressing, b: by the substrate) according to the second embodiment (sound wave inlet hole + counter bore + waterproof means) of the present invention after being pressed).
  • FIG 8 (a, b, c, d) is a configuration diagram of the back of the front body having a counter bore according to the second embodiment of the present invention (a: before mounting the waterproofing means, b, c, d: after mounting the waterproofing means) before board mounting).
  • Figure 9 is a configuration diagram of the front body and substrate assembly according to an embodiment of the present invention.
  • FIG. 10 is an explanatory diagram of an acoustic performance test method for an acoustic camera of the present invention.
  • Figure 11 (a, b, c) is a comparative example of the present invention (no waterproof membrane), Example 1 (waterproof membrane in the sound wave inlet hole and no counter bore), Example 2 (waterproof membrane is located in the counter bore). ) Acoustic performance test result graph (a: SNR, b: MSL, c: BW).
  • FIG. 12 is a scene diagram (submersion) of a submersion performance test for an acoustic camera provided with a waterproofing means of the present invention.
  • 13 (a, b) is a water spray waterproof test method and result diagram (injection scene, internal confirmation scene after test) for an acoustic camera equipped with a waterproof means of the present invention.
  • An acoustic camera equipped with a waterproof means of the present invention includes a front protection unit 10 having a plurality of sound wave inlet holes 20 for inducing sound waves or ultrasonic waves to reach the MEMS microphone 20;
  • the MEMS microphones 30 that detect sound waves introduced through the sound wave inlet grooves 11 of the front protection unit 10 while being fixed to a substrate 30; a substrate 40 on which the MEMS microphones 20 are mounted;
  • an image capturing unit 50 for capturing a scene toward which the front protection unit 10 is facing using a photographing lens 41; a rear housing 60 covering the rear of the front protection unit 10; It is characterized in that it is configured to include; a waterproofing unit 70 that blocks water from reaching the MEMS microphone 30 or the substrate 40 through the sound wave inlet hole 20.
  • the width or diameter of the front side (exposure side) of the sound wave inlet hole 20 is larger than that of the rear side (substrate side), and the rear side (substrate side) ) to the front side (exposed side), it is preferable to be composed of an expandable shape in which the cross-sectional area continuously widens.
  • FIG. 1 is an overall configuration diagram of a sound camera equipped with a waterproofing means according to an embodiment of the present invention.
  • the acoustic camera equipped with a waterproof means includes a front protection unit 10, sound wave inlet holes 20 and MEMS. It is composed of the microphones 30, the substrate 40, the photographing means 50, the rear housing 60, and the waterproof means 70.
  • the front protection unit 10 is provided with a plurality of sound wave inlet holes 20 for inducing sound waves or ultrasonic waves to reach the MEMS microphone 20 .
  • the MEMS microphones 30 sense sound waves introduced through the sound wave inlet holes 20 of the front protection unit 10 while being fixed to the substrate 30 .
  • MEMS microphones 20 are mounted on the substrate 40 .
  • the photographing means 50 photographs the scene toward which the front protection unit 10 is facing.
  • the photographing means 50 includes an optical lens for imaging, and the optical lens is optically exposed toward the front through a lens hole located in the center of the front protection unit 10 to take an image.
  • the rear housing 60 covers the substrate 40 and the rear of the front protection unit 10 in a state where the substrate 40 is located on the rear side of the front protection unit 10. .
  • the waterproof unit 70 blocks water from reaching the MEMS microphone 30 or the substrate 40 through the sound wave inlet hole 20 .
  • the rear housing 60 may be a hollow cylindrical shape constituting a body as shown in FIG. 1, and otherwise, in the case of a movable sound camera (eg, the rear body of Registered Patent Registration No. 10-1471299), the front is protected. It may have a shape corresponding to the front protection unit 10 in terms of the size or shape of the unit 10.
  • the acoustic camera includes a data acquisition unit that acquires acoustic (sound wave or ultrasonic) signals detected by the MEMS microphones 30 through the sensor substrate unit 40, and a sound field visualization based on the acoustic signals of the data acquisition unit. and an arithmetic processing unit that calculates at least one necessary acoustic parameter (eg, a beam power level at a point on a virtual plane).
  • the calculation processing unit performs beamforming.
  • the arithmetic processing unit converts the generated acoustic parameter into a color image and overlaps the optical image image generated by the photographing unit 50 with the acoustic color image to generate an optical and acoustic superimposed image.
  • the data acquisition unit and the calculation processing unit are placed in a space (interior chamber) formed by the front body 10 and the rear housing 60.
  • a space formed by the front body 10 and the rear housing 60.
  • the frequency bands analyzed and processed by the calculation processing unit at least some frequencies belong to the range of 200 Hz to 100 KHz. More specifically, among the frequency bands analyzed and processed by the arithmetic processing unit of the acoustic camera based on the acoustic (sonic or ultrasonic) signals detected by the MEMS microphones 30, at least some frequencies belong to the range of 10 KHz to 30 KHz it is desirable
  • the analysis range is 1 KHz to 15 KHz
  • at least a part of "10 KHz to 15 KHz” belongs to the range of "frequency: 10 KHz to 30 KHz” of the present invention. included in the category
  • the analyzeable range is 25 KHz to 50 KHz
  • at least a part of "25 KHz to 30 KHz” falls within the scope of the present invention
  • "frequency: 10 KHz to 30 KHz range” so it is included in the scope of the present invention. do.
  • Figure 2a is a configuration diagram of the front body according to the first embodiment (sound wave inlet hole + waterproofing means) of the present invention
  • Figure 3a is a detailed view of the front body according to the first embodiment of the present invention
  • Figure 4 is a cross-sectional detailed view of the waterproofing means according to an embodiment of the present invention (a: before being pressed, b: after being pressed by the substrate)
  • Figure 5 (a, b) is a first embodiment of the present invention ( It is a front body, waterproof means part and substrate combination (cross-sectional view, cross-sectional detail view) according to sound wave inlet hole + waterproof means, lack of counter bore).
  • the waterproofing means 60 is the sound wave inflow It includes a sound wave permeable waterproof membrane 61 that shields the sound wave inlet hole 20 in the transverse direction to prevent water from penetrating through the hole 20 . Sound waves pass through the sound wave permeable waterproof membrane 61 and are transmitted toward the substrate, but water cannot penetrate the sound wave permeable waterproof membrane 61 .
  • the sound wave permeable waterproof membrane 61 is the front side of the front protection unit 10 or the midpoint of the sound wave inlet hole 20 (after the front end of the sound wave inlet hole). point between the ends) may be located.
  • the inner wall 20a forming the sound wave inlet hole 20 is separately manufactured and the waterproof membrane 61 is inserted. It can be manufactured in such a way as to assemble later.
  • the waterproofing unit 60 is It is preferable to be provided between the rear surface of the front protection unit 10 (among which the area where the sound wave inlet hole is formed) and the substrate 40 and the front surface of the substrate 40 .
  • the sound wave permeable waterproof membrane 61 of the waterproof unit 60 shields the sound wave inlet hole 20 formed in the front protection unit 10 in the transverse direction to prevent water from penetrating.
  • the MEMS microphones 30 attached to the substrate 40 are located facing each other at positions corresponding to the sound wave inlet holes 20 and the waterproof means 60.
  • the waterproof means 70 includes the sound wave permeable waterproof membrane 71 and the first adhesive layer. (72) and a sponge layer (73).
  • the sound wave permeable waterproof membrane 71 shields the sound wave inlet hole 20 in the transverse direction to prevent water from penetrating through the sound wave inlet hole 20 .
  • the first adhesive layer 72 is located on the periphery and front side of the sound wave permeable waterproof membrane 71 and comes into contact with the rear surface of the front protection unit 10 .
  • the sponge layer 73 is attached to the periphery of the rear side of the sound wave permeable waterproof membrane 71 (opposite to the first adhesive layer) and contacts the front surface of the substrate 40 to be pressed by the pressure of the substrate 40.
  • Compressible material consists of
  • the waterproof unit 70 has a second adhesive layer 75 attached to the front surface of the substrate 40 on the rear side of the sponge layer 73 (opposite the first adhesive layer 72). may be provided.
  • the sponge layer 73 is attached to the front surface of the substrate 40 by the second adhesive layer 75 .
  • the thickness of the sound wave permeable waterproof membrane 61 of the waterproof unit 60 is preferably 0.005 to 0.02 mm. If it is less than 0.005 mm, it is difficult to manufacture and waterproofness is weakened, and if it is more than 0.02 mm, waterproofness increases but sound wave permeability is poor.
  • F69 MBR fabric from Kolon Materials (Address: Kolon Tower, 11 Kolon-ro, Gwacheon-si, Gyeonggi-do, Korea) was ordered and used.
  • the width (or diameter) of the exposed portion may be the same as the width (or diameter) of the portion adjacent to the sensor. Alternatively, it is composed of an expandable shape in which the cross-sectional area becomes wider as it goes from the sensor adjacent portion to the outer exposed portion.
  • the front protector may be made of plastic or metal, and after being produced in the form of injection, etc., the sound wave inlet hole 20 may be formed by cutting or punching.
  • One of the horizontal and vertical sizes of the front protector 10 is in the range of 5.0 to 50 cm. In case of more than 50 cm, it is inappropriate to construct a movable acoustic camera. In the case of less than 5 cm, there is a problem in that the number of acoustic sensors and the separation distance are limited. Therefore, the range of 5.0 to 50 cm is suitable, and more preferably about 7.5 to 35 cm is preferred from the viewpoint of mobility.
  • the front protection unit 10 is made of plastic or metal material and has a plane or a curved surface convex to the exposure side, and the sound wave inlet hole 20 has a shape penetrating the front protection unit 10, and 10 to 300 , and one MEMS microphone 30 is disposed in one sound wave inlet hole 20 .
  • the number of sound wave inlet holes 20 is preferably 10 to 300, but if the number is less than 10, the separation distance between the sensors on the substrate of the same size increases and the upper limit of the frequency that can visualize the sound field occurs.
  • the plurality of MEMS microphones 30 are integrally mounted on a rigid or flexible substrate 40, and as the front protection unit 10 and the substrate 40 are integrally coupled, the single sound wave Inside the inlet hole 20, one MEMS microphone 30 is positioned to correspond to each.
  • Figure 2b is a front body configuration diagram according to the second embodiment (sound wave inlet hole + counter bore + waterproofing means) of the present invention
  • Figure 3b is a detailed view of the front body according to the second embodiment of the present invention.
  • Figure 6 is a front body, waterproof means and substrate coupling (cross-sectional view, cross-sectional detail view) according to the second embodiment of the present invention (sound wave inlet hole + counterbore + waterproof means)
  • Figure 7 are the front body, waterproof means and substrate coupling (a: before being pressed, b: after being pressed by the substrate) according to the second embodiment of the present invention (sound wave inlet hole + counter bore + waterproof means)
  • Figure 8 is a configuration diagram of the back of the front body having a counter bore according to the second embodiment of the present invention (a: before mounting the waterproofing means, b, c, d: waterproofing means) after mounting and before board mounting).
  • the acoustic camera equipped with the waterproof means according to the second embodiment (sound wave inlet hole + counterbore + waterproof means) of the present invention has a front protection unit 10
  • a counter bore 15 formed by stepwise digging from the rear surface of the front body 10a is further formed in the rear surface of the rear surface where the sound wave inlet hole 20 is formed.
  • the waterproofing means 60 is placed in the counter bore 15.
  • the periphery of the sound wave permeable waterproof membrane 71 is attached to the bottom surface of the counterbore 15 (stepped groove) by the first adhesive layer 72.
  • the counter bore 15 may be a stepped groove or a flat cylindrical groove formed by being inserted into the front side of the rear side of the front protection unit 10, that is, the opposite side of the sound wave inlet hole 20 formed in the front side.
  • the counter bore 15 communicates with the rear of the sound wave inlet hole 20 .
  • the counter bore 15 provides a space in which the waterproofing means 60 is placed and provides convenience in installing the waterproofing means 60 .
  • the step of the counterbore 15 prevents the watertight means 60 from escaping in the lateral direction.
  • the waterproofing means portion 60 has a counter bore ( When positioned at 15), the sponge layer 73 protrudes rearwardly higher than the back surface of the counterbore 15. In such a state, as shown in FIG. 7B , the front surface of the substrate 40 presses the sponge layer 73 and is combined with the front protection unit 10 .
  • the depth of the counter bore 15 is preferably 0.2 to 2 mm.
  • the waterproofing means 60 When the depth of the counterbore 15 is less than 0.2 mm, the waterproofing means 60 may be laterally displaced, and when the depth of the counterbore 15 exceeds 2mm, the size of the waterproofing means 60 is larger than necessary. There is a growing problem.
  • the depth of the counter bore 15 is 0.45 mm and the waterproofing means 60 including the sponge layer 73. ) is 0.66 mm.
  • the sponge layer 73 has restoring force while being pressed by 0.21 mm by the pressure of the substrate 40 . Due to the restoring force of the sponge layer 73, the periphery of the sound wave permeable waterproof membrane 71 adheres to the bottom surface of the counter bore 15 (stepped groove) or the rear surface of the front protection unit 10. Due to this, the separation and separation of the waterproof membrane 71 is prevented.
  • an upper protruding cover 80 which is fixed to the upper portion of the front protection unit 10 or the rear housing 60 and protrudes forward more than the front side of the front protection unit 10 is further included. can do.
  • the width or diameter of the front side (exposure side) of the sound wave inlet hole 20 is greater than the width or diameter of the rear side (substrate side). It is larger and is composed of an expandable shape in which the cross-sectional area continuously widens from the rear side (substrate side) to the front side (exposure side).
  • SNR signal-to-noise ratio
  • Figure 9 is a configuration diagram of the front body and substrate assembly according to an embodiment of the present invention.
  • the substrate 40 is coupled to the front protection unit 10 by means of assembling means.
  • FIG. 10 is an explanatory view of the acoustic performance test method for the acoustic camera of the present invention
  • FIG. 11 (a, b, c) is a comparative example of the present invention (extended sound wave inlet hole, no waterproof membrane)
  • Example 1 extended sound wave Acoustic performance test results graphs (a: SNR, b: MSL, c: BW) for Example 2 (extended sound wave inlet hole + waterproof membrane + counter bore) .
  • the signal-to-noise ratio measurement result (SNR) for each frequency is generally determined to be excellent when the signal-to-noise ratio of the sensor is high, and a sensor or array having a higher SNR can measure even smaller sounds.
  • the acoustic cameras equipped with the waterproof means according to the first and second embodiments of the present invention generally have the same array sensor performance as the existing acoustic camera (comparative example) without the waterproof means attached. It was confirmed that it showed equal or higher performance in the region of 20 kHz or higher.
  • the maximum side lobe level measurement result (MSL) for each frequency is one of the representative performance indicators of an array sensor, and the higher the MSL, the better the performance for simultaneously discriminating noise sources of various sizes.
  • MSL maximum side lobe level measurement result
  • the higher the msl the better the performance of the array sensor.
  • 3dB beamwidth performance measurement result for each frequency (3dB bandwidth) This is one of the representative performance indicators of an array sensor, and the performance is determined by calculating the beamwidth at a position of -3dB at the maximum side lobe level. The smaller the beam width, the better the ability to distinguish several nearby noise sources. In general, the smaller the 3dB bandwidth, the better the performance of the array sensor.
  • the acoustic camera equipped with the waterproof means according to the first and second embodiments of the present invention has performance aspects compared to conventional acoustic cameras (comparative examples) without waterproof means attached. It was confirmed that there was no significant difference in
  • FIG. 12 is a scene diagram (immersion) of a submersion performance test for an acoustic camera provided with a waterproofing means of the present invention. As a result of the immersion test, it was confirmed that water did not permeate the substrate 40 .
  • Center of water flow a circle of about 40 mm, 2.5 m away from the nozzle
  • Test time 1 minute per 1 m 2 of enclosure surface area, minimum test time 3 minutes (test time: 3 minutes)
  • an acoustic camera having excellent sound sensing performance and having a waterproof function is provided so that it can be installed or used in a mobile environment instead of indoors.

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  • Health & Medical Sciences (AREA)
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Abstract

La présente invention concerne une caméra acoustique dotée d'un moyen étanche à l'eau, celle-ci comprenant : une partie de protection avant (10) comportant une pluralité de trous d'entrée d'ondes sonores (20) servant à guider une onde sonore ou une onde ultrasonore pour qu'elle atteigne des microphones MEMS (20) ; des microphones MEMS (30) servant à détecter une onde sonore entrant par les trous d'entrée d'ondes sonores (11) de la partie de protection avant (10), tout en étant fixés à un substrat (40) ; le substrat (40) sur lesquels les microphones MEMS (20) sont montés ; une partie de capture d'image (50) servant à capturer la scène à laquelle la partie de protection avant (10) fait face au moyen d'une lentille de capture (41) ; un boîtier arrière (60) servant à recouvrir l'arrière de la partie de protection avant (10) lorsque que le substrat (40) est positionné sur la surface arrière de la partie de protection avant (10) ; et une partie de moyen étanche à l'eau (70) servant à empêcher l'eau d'atteindre les microphones MEMS (30) ou le substrat (40) par les trous d'entrée d'ondes sonores (20).
PCT/KR2022/011725 2021-08-18 2022-08-07 Caméra acoustique dotée d'un moyen étanche à l'eau WO2023022418A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR1020210108416A KR102566117B1 (ko) 2021-08-18 2021-08-18 방수 수단이 구비된 음향 카메라
KR10-2021-0108416 2021-08-18
KR10-2021-0134561 2021-10-11
KR1020210134561A KR20230051746A (ko) 2021-10-11 2021-10-11 방수 수단이 구비된 음향 카메라

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KR20140121623A (ko) * 2013-04-08 2014-10-16 싸니코전자 주식회사 복수의 음향통과홀을 구비한 멤스 마이크로폰
KR101471300B1 (ko) * 2013-08-19 2014-12-10 (주)에스엠인스트루먼트 이동식 음향 카메라 제조 방법
JP2019083479A (ja) * 2017-10-31 2019-05-30 キヤノン株式会社 マイクロホン保持構造
KR20200056413A (ko) * 2017-09-19 2020-05-22 더블유.엘. 고어 앤드 어소시에이트스, 인코포레이티드 경화성 지지층을 포함하는 음향 보호 커버

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08294026A (ja) * 1995-04-21 1996-11-05 Mitsubishi Electric Corp 監視用撮像装置
KR20140121623A (ko) * 2013-04-08 2014-10-16 싸니코전자 주식회사 복수의 음향통과홀을 구비한 멤스 마이크로폰
KR101471300B1 (ko) * 2013-08-19 2014-12-10 (주)에스엠인스트루먼트 이동식 음향 카메라 제조 방법
KR20200056413A (ko) * 2017-09-19 2020-05-22 더블유.엘. 고어 앤드 어소시에이트스, 인코포레이티드 경화성 지지층을 포함하는 음향 보호 커버
JP2019083479A (ja) * 2017-10-31 2019-05-30 キヤノン株式会社 マイクロホン保持構造

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