JP2010206415A - Fixing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fixing device capable of accurately maintaining a position relationship of five microphones, fixing the five microphones and one camera together, and increasing precision in estimation of sound source positions. <P>SOLUTION: The fixing device includes: a first microphone fixing unit for fixing the four microphones; a second microphone fixing unit for fixing one microphone; a camera mounting unit; a support frame for supporting the camera mounting unit and first and second microphone fixing units; and a microphone fixing component. The first and second microphone fixing units include a fixing hole for allowing a shaft of the microphone to pass through for fixing the shaft. The microphone is fixed to a microphone fixing unit by the microphone fixing component to prevent extraction from the fixing hole. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention provides a microphone and a camera used in a sound source estimation method for estimating a sound source using sound data collected by a plurality of microphones and video data photographed by a camera, so that the microphone and the camera can be accurately maintained at a predetermined relative position. It relates to the device.

Conventionally, as a method of estimating the direction of sound arrival, a microphone array in which a large number of microphones are arranged at equal intervals is constructed, and the direction of the sound source, which is the direction of sound wave arrival, is estimated from the phase difference of each microphone relative to the reference microphone. A so-called acoustic technique has been devised (see, for example, Non-Patent Document 1).
On the other hand, not a phase difference between output signals of a plurality of microphones arranged at a measurement point, but a plurality of microphone pairs arranged in a straight line intersecting each other from the plurality of microphones, and the position between the two microphones constituting the pair There has been proposed a method for estimating the direction of a sound source from a ratio between an arrival time difference corresponding to a phase difference and an arrival time difference between two pairs of other microphones (see, for example, Patent Documents 1 to 3).
Specifically, as shown in FIG. 15, two microphone pairs (M1, M3) and microphone pairs (four microphones M1 to M4) are arranged at predetermined intervals on two straight lines orthogonal to each other. M2, M4) are arranged so as to constitute the microphone pair (M1, M3), and the microphones constituting the microphone pair (M2, M4). The horizontal angle θ between the measurement point and the position of the sound source is estimated from the ratio of the arrival time difference between the sound pressure signals input to M2 and M4, and the fifth microphone M5 is not on the plane formed by the microphones M1 to M4. Further, four microphone pairs (M5, M1), (M5, M2), (M5, M3), (M5, M4) are configured to each of the microphones. The elevation angle φ formed by the measurement point and the position of the sound source is estimated from the arrival time difference between the microphones constituting the microphone pair.
As a result, the direction of the sound source can be accurately estimated with a smaller number of microphones than in the case where the direction of the sound source is estimated using the microphone array.
At this time, a video sampling means such as a CCD camera is provided to capture a video of the estimated direction of the sound source, and then the video data and the data of the direction of the sound source are combined to generate the estimated value in the video. If the sound source direction and the sound pressure level are displayed as a graphic, the sound source can be visually grasped.

Japanese Patent Laid-Open No. 2002-181913 JP 2006-324895 A JP 2008-224259 A

Toshiro Oga, Yoshio Yamazaki, Yutaka Kaneda, Acoustic System and Digital Processing, Corona, 1995

Conventionally, since the five microphones could not be accurately maintained in the positional relationship as shown in FIG. 15, there was a problem that the accuracy of sound source position estimation was lowered.
The present invention provides a fixing device that can accurately maintain the positional relationship of five microphones, can fix the five microphones and one camera together, and can improve the accuracy of sound source position estimation.

A fixing device according to the present application is for fixing a microphone and a camera used in a sound source estimation method for estimating a sound source using sound data collected by a plurality of microphones and video data captured by a camera at a predetermined relative position. A first microphone fixing portion for fixing four microphones, a second microphone fixing portion for fixing one microphone, a camera mounting portion, a camera mounting portion, and first and second fixing devices. A support frame for supporting the microphone fixing portion and a microphone fixing component are provided, and the first microphone fixing portion has the center of the sound sampling portion of one pair of two microphones on the first straight line at a predetermined interval. One pair of two microphones is fixed so that the other pair of two microphones The other pair of two microphones is fixed so that the center of the sampling part is positioned at a predetermined interval on a second straight line orthogonal to the first straight line, and one second microphone is fixed to the second microphone fixing part. One microphone is fixed so that the center of the sound collecting portion of the microphone is positioned away from the square plane connecting the centers of the sound collecting portions of the four microphones. And fixed to a position where an image of the sound source position estimated from the phase difference of the output signals of each microphone can be taken, and the first and second microphone fixing portions penetrate through the shaft portions of the microphones. Since the microphone is fixed to the microphone fixing portion by the microphone fixing component so that the microphone is prevented from being pulled out from the fixing hole, five microphones are provided. The positional relationship between the Kurofon be maintained accurately, and since the five microphone and one camera can be fixed together, it is possible to improve the accuracy of the source position estimation.
Since the first and second microphone fixing portions have fixing holes and notches penetrating the inner peripheral surface of the fixing holes and the outer peripheral surface of the fixing portion, the microphone shaft portion and the microphone cable are cut. Since it can be inserted into the fixing hole through the notch, the fixing operation of the microphone becomes easier, and the troublesomeness in the fixing operation of the microphone can be eliminated.
A microphone insulation component is provided, and the microphone is electrically isolated from the input signal of the microphone because the shaft insulation portion and the microphone fixation portion are insulated by the microphone insulation component while the microphone shaft portion passes through the fixing hole of the microphone fixation portion. Noise can be prevented from being mixed.
The microphone insulation component includes an upper insulation component and a lower insulation component, and the outer peripheral surface of the microphone shaft portion and the inner peripheral surface of the hole of the upper insulation component are in a state where the microphone shaft portion penetrates the hole of the upper insulation component. Adhered, the upper insulating part is positioned inside the fixing hole and fixed in contact with the small diameter part that insulates the inner peripheral surface of the fixing hole from the microphone shaft and the upper surface of the fixing part around the fixing hole. A bottom surface that insulates the top surface of the microphone and the shaft portion of the microphone and prevents the microphone from falling off from the fixing hole. Since the microphone shaft is insulated, electrical noise can be prevented from entering the microphone input signal, and the upper insulating component bonded to the microphone shaft can be fixed around the fixing hole. By parts top engages, coming off downward microphone is prevented.
Since the first microphone fixing portion and the second microphone fixing portion are formed of an insulating material, it is possible to prevent electrical noise from being mixed into the input signal of the microphone without using a microphone insulating component.

(A) is a top view of a fixing device main body, (b) is a front view of a sound and image | video collection part, (c) is a right view of a sound and image | video collection part (form 1). (A) is a top view of the upper side insulation component which comprises a microphone insulation component, (b) is sectional drawing (form 1) of an upper side insulation component. (A) is a top view of the lower insulation component which comprises a microphone insulation component, (b) is sectional drawing (form 1) of a lower insulation component. (A) is a top view of a microphone fixing component, (b) is sectional drawing (form 1) of a microphone fixing component. (A) is an exploded perspective view of the fixing device main body, (b) is an assembly procedure diagram (mode 1) showing a state in which the base and the support frame are assembled. (A) is an assembly procedure diagram showing a state in which the microphone pair fixing portion and the support frame are assembled. (B) is an assembly procedure diagram showing a state in which the fifth microphone fixing portion and the support frame are assembled. 1). (A) is an exploded perspective view of the assembly procedure showing the relationship between the fixing hole of the microphone pair fixing part of the fixing device, the microphone, the microphone insulating part, and the microphone fixing part, and (b) is one of the fixing holes of the microphone pair fixing part. The assembly point perspective view which shows the state by which the microphone was fixed (form 1). (A) is a disassembled perspective view showing the fixing device, the camera, and the stand device in an exploded manner, and (b) is a perspective view (form 1) showing the sound and video sampling unit. (A) is a top view of a fixing device main body, (b) is a front view of a sound and image | video sampling part, (c) is a right view of a sound and image | video sampling part (form 2). (A) is a top view of the upper side insulation component which comprises a microphone insulation component, (b) is sectional drawing (form 2) of an upper side insulation component. (A) is a top view of the lower side insulation component which comprises a microphone insulation component, (b) is sectional drawing (form 2) of a lower side insulation component. The top view of a fixing device main body (form 3). The top view of a fixing device main body (form 4). The figure which shows the attachment position in the vehicle of a sound and image | video collection unit and a sound source position estimation apparatus (form 1 thru | or form 4). The figure which shows the positional relationship of a microphone (conventional).

As shown in FIGS. 1B and 1C, the fixing device 1 according to the present embodiment estimates a sound source using sound data collected by a plurality of microphones and video data taken by a camera. This is an apparatus for fixing the five microphones 2 and one camera 3 used in the above to a predetermined relative position.
A sound and video sampling unit in which five microphones 2 and one camera 3 are fixed in a predetermined relationship position by attaching five microphones 2 and one camera 3 to the fixing device 1 in a fixed state. 99 is configured.
As shown in FIG. 8B, the sound and video collection unit 100 includes a sound and video collection unit 99 and a base device 4. The stand device 4 places the sound and video sampling unit 99 so as to be movable up and down, and the sound and video sampling unit 99 is centered on a rotation center axis a1 parallel to the central axis a2 of the microphone 2 fixed to the fixing device 1. It is mounted so as to be rotatable.
That is, the sound and video sampling unit 100 can be rotated by placing a sound and video sampling unit 99 in which the five microphones 2 and one camera 3 are fixedly mounted on the fixing device 1 on the platform device 4. It is a configuration that can move up and down.

  As shown in FIG. 7A, the fixing device 1 includes a base 6, a support frame 7, a microphone pair fixing portion 8 as a first microphone fixing portion, and a fifth microphone fixing as a second microphone fixing portion. A portion 9, a microphone insulating component 10, and a microphone fixing component 11. A fixing device body 5 is formed by the base 6, the support frame 7, the microphone pair fixing portion 8, and the fifth microphone fixing portion 9.

  The base 6, the support frame 7, the microphone fixing component 11, and the shaft portion 38 of the microphone 2 are formed of a metal such as stainless steel, and the microphone insulating component 10 is formed of an insulating material.

  As shown in FIG. 5A, the base 6 is formed in, for example, a flat plate of a right isosceles triangle. The lower ends of the three columns 14 (14a, 14b) of the support frame 7 are connected to the apex of the base triangle by connection means such as welding or adhesion. The triangle apex of the base 6 and the lower ends of the three support posts 14 of the support frame 7 are configured to engage with each other, and the apex of the triangle of the base 6 and the lower ends of the three support posts 14 of the support frame 7 The connection is made by connecting means such as welding or adhesion in the state of engaging the projections and depressions.

  The support frame 7 includes a front frame 7a and a rear frame 7b. The front frame 7 a includes a camera fixing frame 17, left and right beams 18, and a fixing portion support frame 19. The camera fixing frame 17 is connected to two vertices other than the right vertices of the right-angled isosceles triangle of the base 6 and extends in the vertical direction with respect to the flat plate surface 22 of the base 6 and left and right lower support columns 14a. And a camera mounting portion 20 provided to extend rearward from the vertical center position. The camera mounting portion 20 is formed of a flat plate having a surface orthogonal to a side other than the isosceles side of the right angled isosceles triangle of the base 6, and includes a through hole 21 through which a screw for screwing the camera is passed. The fixed portion support frame 19 extends obliquely upward in the direction approaching each other from the upper ends of the front left and right lower columns 14 a and then extends in a direction perpendicular to the flat plate surface 22 of the base 6. The left and right beams 18 extending left and right connect the upper end positions of the front left and right lower columns 14a. The left and right beams 18 function as a reinforcing portion that increases the strength of the support frame 7. The rear frame 7b includes a fixed portion support frame 19a and front and rear beams 23 extending forward and backward. The fixed portion support frame 19a is formed by a rear column 14b whose lower end is connected to a right vertex of a right-angled isosceles triangle of the base and extends obliquely upward in the front direction. The front and rear beams 23 protrude from the center portion of the rear column 14b and connect the rear column 14b and the left and right beams 18. The front end portion of the front and rear beams 23 and the central portion of the left and right beams 18 are configured to engage with each other, and the front end portion of the front and rear beams 23 and the center portion of the left and right beams 18 are engaged with the projections and recesses. Connected by means.

  As shown in FIG. 5A, the microphone pair fixing portion 8 includes fixing holes 31 at four corners of a flat regular square frame. The centers of the four fixing holes 31 are formed so as to coincide with the vertices of a regular square. As shown in FIGS. 5 (b) and 6 (a), the inner side surface 32 of the square frame 30 connecting the four fixing holes 31 and the upper portions of the left and right and rear three fixing portion support frames 19, 19a Are connected to each other by connecting means such as welding or adhesion in a state where the inner surface 32 of the square frame portion 30 and the upper portions of the three fixing portion support frames 19 and 19a are engaged in the concave and convex portions. .

  As shown in FIG. 6A, the fifth microphone fixing portion 9 is formed in a flat ring shape having a fixing hole 31. At the outer periphery of the ring of the fifth microphone fixing portion 9, the upper ends of the three fixing portion support frames 19, 19a are connected to the upper ends of the three fixing portion support frames 19, 19a by welding or bonding. A concave portion 35 is formed to engage with the concave and convex portions. The concave portion 35 of the fifth microphone fixing portion 9 and the upper ends of the three fixing portion support frames 19, 19a are connected by connecting means such as welding or adhesion in a state where the concave and convex portions are engaged.

  Thus, the fixing device main body 5 as shown in FIGS. 6B and 1A is formed.

  Then, as shown in FIG. 7A, the microphone 2 is fixed to the fixing hole 31 using the microphone insulating component 10 and the microphone fixing component 11 constituting the fixing device 1. The microphone insulating component 10 includes an upper insulating component 10a and a lower insulating component 10b.

  As shown in FIG. 2, the upper insulating component 10 a is formed in a plate ring shape having a through hole 39 having a size through which the shaft portion 38 of the microphone 2 is fitted. The upper insulating component 10 a includes a small diameter portion 41 having a small outer diameter and a large diameter portion 42 having an outer diameter larger than the outer diameter of the small diameter portion 41. The ring surface connecting the upper end of the outer periphery of the small diameter portion 41 and the lower end of the outer periphery of the large diameter portion 42 forms a collar surface 43 for preventing the dropout. As shown in FIG. 7A, in the state where the shaft portion 38 of the microphone 2 is fitted through the through hole 39 of the upper insulating component 10a, the inner peripheral surface of the through hole 39 of the upper insulating component 10a and the microphone 2 are inserted. The outer peripheral surface of the shaft portion 38 is bonded with an adhesive. In this case, the large diameter portion 42 is positioned on the side close to the sound collection portion 45 of the microphone 2. As a result, when the microphone 2 is inserted into the fixing hole 31 from above the fixing hole 31 from the lower end side of the shaft portion 38 of the microphone 2, the small diameter portion 41 is positioned inside the fixing hole 31 and the fixing hole 31. The inner peripheral surface is insulated from the shaft portion 38 of the microphone 2. Further, since the flange surface 43 corresponding to the lower surface of the large-diameter portion 42 and the fixing portion upper surface 46 around the fixing hole 31 are in contact with each other (see FIGS. 1B, 1C, and 7B), the fixing is performed. The upper surface 46 and the shaft portion 38 of the microphone 2 are insulated, and the locking of the flange surface 43 and the fixed portion upper surface 46 prevents the microphone 2 from falling off.

  As shown in FIG. 3, the lower insulating component 10 b is formed in a flat plate ring shape having a through hole 48 of a size that allows the shaft portion 38 of the microphone 2 to be inserted therethrough. The outer peripheral diameter of the ring of the lower insulating component 10 b is formed larger than the diameter of the fixed hole 31. The lower insulating component 10 b is not bonded to the shaft portion 38 of the microphone 2.

  As shown in FIG. 4, the microphone fixing part 11 is formed by a well-known retaining ring called a snap ring, for example.

  Accordingly, as shown in FIGS. 7A and 7B, the microphone 2 is inserted into the fixing hole 31 from the lower end side of the shaft portion 38 of the microphone 2 in which the upper insulating component 10 a is bonded to the shaft portion 38, and the small diameter With the portion 41 penetrating the fixing hole 31 and contacting the flange surface 43 and the fixing portion upper surface 46 around the fixing hole 31, the lower insulating component 10 b is connected to the shaft portion 38 from the lower end side of the shaft portion 38 of the microphone 2. The ring upper surface 49 of the lower insulating component 10b and the fixing portion lower surface 51 around the fixing hole 31 are brought into contact with each other, and in this state, the ring lower surface 52 of the lower insulating component 10b and the upper surface 56 of the microphone fixing component 11 The engaging hole 54 of the microphone fixing part 11 is engaged with the shaft portion 38 while contacting with each other.

  According to the above, since the shaft portion 38 of each microphone 2 and the fixed portions 8 and 9 are insulated by the microphone insulating component 10, it is possible to prevent electrical noise from being mixed into the input signal of the microphone 2. Further, the upper insulating component 10 a bonded to the shaft portion 38 of the microphone 2 engages with the upper surface 46 of the fixing portion around the fixing hole 31, thereby preventing the microphone 2 from falling off. Further, since the microphone fixing component 11 is fixedly attached to the shaft portion 38 of the microphone 2, the microphone fixing component 11 is locked to the ring lower surface 52 of the lower insulating component 10b. Omission is prevented. Further, since the lower insulating component 10b and the shaft portion 38 of the microphone 2 are not bonded, when the microphone 2 fails, the microphone 2 can be easily removed by removing the microphone fixing component 11 and the lower insulating component 10b. Can be exchanged.

  As shown in FIG. 8A, the microphone 2 is fixed to each of the four fixing holes 31 of the microphone pair fixing portion 8, and the microphone 2 is also fixed to the fixing holes 31 of the fifth microphone fixing portion 9.

  As described above, the center of the sound collection unit 45 of one pair of the two microphones 2 and 2 is positioned on the first straight line X (see FIG. 15) at a predetermined interval in the microphone pair fixing unit 8. A pair of two microphones 2 and 2 are fixed to each other, and a second straight line Y in which the center of the sound collecting unit 45 of the other pair of two microphones 2 and 2 is orthogonal to the first straight line X. The other pair of two microphones 2 and 2 are fixed so as to be positioned at a predetermined interval on the top (see FIG. 15), and the fifth microphone fixing portion 9 has a center of the sound collecting portion of one microphone. By fixing one microphone 2 so as to be located at a position distant from the square plane connecting the centers of the sound collecting portions 45 of the four microphones 2, each vertex position of the regular quadrangular pyramid is fixed. 5 micro Center of the sound collecting portion 45 of the O emissions 2 are positioned.

  Then, by installing the camera 3 on the base 6, passing the screw 55 through the through hole 21 formed in the camera mounting portion 20, and fastening the screw 55 to the screw hole 57 provided on the side surface of the camera 3, The camera 3 is fixed to the camera mounting portion 20 with screws 55 in a fixed state.

  As described above, the sound and video sampling unit 99 is formed. As shown in FIGS. 1 (b), 1 (c), and 8 (b), the sound and video sampling unit 99 of this embodiment has a size in the left-right direction a of 40 mm (the left-right width of the support frame is 37 mm), front and rear The dimension in the direction b is 60 mm (the left-right width dimension of the support frame is 20 mm), and the dimension in the height direction c is 85 mm. Further, according to the sound and video sampling unit 99, the difference between the acoustic center (point equidistant from each microphone) and the video center (center position of the lens of the camera) is 0 mm in the left-right direction a and b in the front-rear direction b. 22 mm, and the height direction c was 42 mm. Therefore, the error between the estimated sound source position and the captured image can be reduced.

  The table device 4 includes a tripod 60, a vertical expansion / contraction mechanism 61, and a turntable 62. The vertical extending / contracting mechanism 61 includes an extending / contracting bar 63 and an adjusting mechanism 64 that determines the amount of expansion / contraction of the extending / contracting bar 63. The adjustment mechanism 64 is formed by a through screw hole 66 provided in the guide tube 65 of the telescopic rod 63 and an adjustment screw 67 that is screwed into the through screw hole 66 to advance and retreat, and is adjusted by fastening the adjustment screw 67. The tip of the screw 67 is pressed against the outer periphery of the telescopic bar 63 to restrict the vertical movement of the telescopic bar 63, thereby determining the height position of the turntable 62 rotatably provided at the upper end of the telescopic bar 63. The turntable 62 is formed in a disc shape, and a knurl 69 is formed on the outer peripheral surface 68 of the circle. A connecting rod 63a is provided from the center of the upper surface of the turntable 62, and the connecting rod 63a is fitted into a rotation center hole 90 provided in the base 6 so that the connecting rod 63a and the base 6 are fixed to each other. The sound and video sampling unit 99 and the stand device 4 are connected, and thereby the sound and video sampling unit 100 is completed. By rotating the turntable 62 by placing the hand on the knurl 69, the sound and image collection unit 99 also rotates together with the turntable 62 around the center of the circle of the turntable 62.

  As shown in FIG. 14, the sound and image collection unit 100 is installed in a room 111 of the car 110, and the sound collected by the five microphones 2 and the image captured by the camera 3 are the sound source position estimation device 101. Is output. The sound source position estimation apparatus 101 displays a sound source direction estimation image on the image display means 102 as an output means based on the input sound and video. Accordingly, it is possible to estimate the source of abnormal noise generated in the room 111 of the vehicle 110.

  According to the fixing device 1 of the first embodiment, the positional relationship of the five microphones 2 can be accurately maintained, and the five microphones 2 and the one camera 3 can be fixed together. It can be improved. Further, since the difference between the acoustic center and the image center is reduced, the error between the estimated sound source position and the captured image is reduced. That is, since the five microphones and the camera are fixed together in a predetermined positional relationship, it is possible to provide a fixing device that is small and excellent in portability while improving the accuracy of sound source position estimation.

Form 2
As shown in FIG. 9, the microphone pair fixing portion 8 and the fifth microphone fixing portion 9 have a notch 75 that penetrates the fixing hole 31, the inner peripheral surface 73 of the fixing hole 31, and the outer peripheral surface 74 of the fixing portions 8 and 9. As shown in FIGS. 10 and 11, the upper insulating component 10a and the lower insulating component 10b are also provided with cuts 76 and 77 corresponding to the cuts 75 of the fixing portions 8 and 9, respectively. The widths g of the cuts 75, 76, and 77 are formed such that a wire cable (not shown) that connects the microphone 2 and the sound source position estimation device 101 passes. Other structures are the same as those of the first embodiment.
According to the second aspect, the electric wire cable that connects the microphone 2 and the sound source position estimating device 101 is not connected to the microphone 2, and the electric wire cable is cut through the 75, 76, and 77 into the fixing hole 31. After the insertion, the microphone 2 can be inserted into the fixing hole 31, and it becomes unnecessary to remove the electric cable from the microphone 2 at the time of fixing the microphone 2, so that the troublesomeness at the time of fixing the microphone 2 can be eliminated.

Form 3
As shown in FIG. 12, the fixing hole 31 of the microphone pair fixing portion 8 and the fifth microphone fixing portion 9 is configured to have an opening 81 as a notch that allows the shaft portion 38 of the microphone 2 to be inserted from the side. The width dimension W of the opening 81 is formed such that the shaft portion 38 of the microphone 2 can be inserted into the fixed hole 31. Other structures are the same as those of the first embodiment.
According to the third aspect, since the shaft portion 38 of the microphone 2 can be inserted into the fixing hole 31 through the opening 81, the fixing work of the microphone 2 becomes easier, and the complexity of the fixing work of the microphone 2 can be eliminated. .

Form 4
As shown in FIG. 13, the microphone pair fixing portion 8 and the fifth microphone fixing portion 9 were formed of an insulating material 85 such as an acrylic resin. Further, similarly to the third aspect, the fixing hole 31 of the microphone pair fixing portion 8 and the fifth microphone fixing portion 9 has an opening 86 that allows the shaft portion 38 of the microphone 2 to be inserted from the side. The width W1 of the opening 86 is formed such that the shaft portion 38 of the microphone 2 can be inserted into the fixing hole 31. In the fourth embodiment, the microphone pair fixing portion 8 and the fifth microphone fixing portion 9 are formed of resin. Therefore, it is easier to bend than metal. Therefore, the width dimension of the opening 86 may be smaller than the width dimension W of the opening 81 of the third embodiment. Since the width dimension W <b> 1 of the opening 86 can be reduced, after the microphone 2 is fixed to the fixing hole 31, the microphone 2 is difficult to tilt toward the opening 86 and is difficult to come off from the fixing hole 31.
According to the fourth aspect, the microphone insulating component 10 according to the first aspect is not necessary, and the microphone pair fixing unit 8 and the fifth microphone fixing unit 9 itself can prevent noise from entering the microphone 2. This is advantageous. Moreover, since the shaft portion 38 of the microphone 2 can be inserted into the fixing hole 31 through the opening 86 as in the third embodiment, the fixing work of the microphone 2 becomes easier, and the trouble in fixing the microphone 2 is reduced. Can be resolved. Other configurations are the same as those of the first embodiment.

  In Embodiments 3 and 4, since the microphone 2 may be inclined toward the openings 81 and 86 after the microphone 2 is fixed to the fixing hole 31, in order to prevent this inclination, the microphone 2 is not shown. It is preferable to attach an anti-tilt material.

  The sound and video sampling unit 100 using the fixing device 1 of the present invention can be used not only in the room 111 of the car 110 but also in any place.

1 fixing device, 2 microphone, 3 camera, 7 support frame,
8 microphone pair fixing part (first microphone fixing part),
9 5th microphone fixing | fixed part (2nd microphone fixing | fixed part),
10 microphone insulation parts, 10a upper insulation parts, 10b lower insulation parts,
11 microphone fixing part, 31 fixing hole, 38 shaft part, 41 small diameter part,
43 surface, 45 sound sampling part, 75 cut, 81,86 opening (cut),
85 Insulating material.

Claims (5)

A fixing device for fixing a microphone and a camera used in a sound source estimation method for estimating a sound source using sound data collected by a plurality of microphones and video data captured by a camera at a predetermined relationship position,
A first microphone fixing portion for fixing four microphones, a second microphone fixing portion for fixing one microphone, a camera mounting portion, a support for supporting the camera mounting portion and the first and second microphone fixing portions. A frame and a microphone fixing part;
The pair of two microphones is fixed to the first microphone fixing portion so that the centers of the sound collecting portions of the pair of two microphones are positioned at a predetermined interval on the first straight line. In addition, the other pair of two microphones is fixed so that the center of the sound collecting portion of the other pair of two microphones is positioned at a predetermined interval on a second straight line orthogonal to the first straight line. And
The second microphone fixing part has one microphone so that the center of the sound collecting part of one microphone is located at a position distant from the square plane connecting the centers of the sound collecting parts of the four microphones. The microphone is fixed,
The camera is fixed to a position where the image of the sound source position estimated from the phase difference of the output signal of each microphone is attached to the camera mounting portion.
The first and second microphone fixing portions include fixing holes that pass through the shaft portion of the microphone and fix the shaft portion,
A fixing device, wherein the microphone is fixed to the microphone fixing portion by a microphone fixing component so that the microphone is prevented from being pulled out from the fixing hole.   2. The fixing device according to claim 1, wherein the first and second microphone fixing portions include a fixing hole and a notch penetrating the inner peripheral surface of the fixing hole and the outer peripheral surface of the fixing portion. .   The microphone is provided with a microphone insulating part, and the microphone is insulated from the shaft part and the microphone fixing part by the microphone insulating part in a state where the shaft part of the microphone penetrates the fixing hole of the microphone fixing part. Item 3. The fixing device according to Item 2.   The microphone insulation component includes an upper insulation component and a lower insulation component, and the outer peripheral surface of the microphone shaft portion and the inner peripheral surface of the hole of the upper insulation component are in a state where the microphone shaft portion penetrates the hole of the upper insulation component. Adhered, the upper insulating part is positioned inside the fixing hole and fixed in contact with the small diameter part that insulates the inner peripheral surface of the fixing hole from the microphone shaft and the upper surface of the fixing part around the fixing hole. A bottom surface that insulates the top surface of the microphone and the shaft portion of the microphone and prevents the microphone from falling off from the fixing hole. The fixing device according to claim 3, wherein a shaft portion of the microphone is insulated.   The fixing device according to claim 1 or 2, wherein the first microphone fixing portion and the second microphone fixing portion are formed of an insulating material.

Images