KR100872500B1 - Guide device for microphone array - Google Patents

Abstract

Disclosed is a microphone guide apparatus for facilitating movement, mounting and detachment of a microphone in a microphone array system using a microphone array to measure the position of a sound source. The microphone array is coupled to a linear guide unit through which sound is passed to minimize the confusion of a sound source to be measured, and is also configured to be easily moved in the longitudinal direction of the guide unit to identify and change the sound source. Not only can the position of the microphone array be easily changed due to the like, but also the microphone placement unit is easily fixed to the guide unit by fixing bolts. Therefore, by easily moving the microphone, it is possible to quickly change the arrangement to be easy to measure, and to easily mount or detach the microphone disposed in the microphone array system, thereby providing an opportunity to smoothly measure the position of the sound source. Will be given.

Microphone array, guide, sound source

Description

Guide device for microphone {GUIDE DEVICE FOR MICROPHONE ARRAY}

1 is a schematic diagram illustrating a principle of tracking a sound source using a microphone array.

2 is a schematic diagram assuming that the sound source and the microphone are all in one plane.

3 is a schematic block diagram showing a conventional microphone array.

Figure 4 is a perspective view of a microphone guide device according to the present invention.

5 is a cross-sectional view illustrating a structure of the microphone guide device of FIG. 4.

FIG. 6 is an operational view showing the longitudinal movement of the guide unit of the microphone placement unit of the microphone guide device of FIG. 4.

FIG. 7 is an operation diagram illustrating mounting and detachment of a microphone placement unit of the microphone guide device of FIG. 4.

<Explanation of symbols for the main parts of the drawings>

100: microphone placement unit 111: through hole

120: slide part 121: protruding fixing member

123: guide protrusion member 200: guide unit

210: guide rail part 211: guide rail member

220: support part

The present invention relates to a microphone guide device, and more particularly, to a microphone guide device that is easy to mount, detach, and move the microphone array for a microphone array system that measures a sound source using a microphone array. .

Microphones are a kind of mechanism for converting voice signals into electrical signals, and their use is widespread. In general, a microphone is used to amplify the converted electric signal and convert it back to a voice signal using a speaker or the like, which is used to enlarge the voice signal.

However, the use of the microphone is not limited thereto, and as an example, a plurality of microphones may be arranged to be used to track the position of a sound source.

A microphone array in which a plurality of microphones are arranged at a predetermined distance from each other may track its position using a time difference of a voice signal received from a sound source. 1 is shown for a detailed description thereof.

1 is a schematic diagram illustrating a principle of tracking the position of a sound source using a microphone array.

As shown, the sound source S generates a voice signal, and each of the microphones M1, M2, M3, and M4 arranged in the microphone array 10 receives the voice signal.

Assuming that the voice signal generated from the sound source S is a straight line, the speed of the voice signal is Vs, the wavelength is lambda, and the frequency is f.

Here, Vs is expressed as an equation for temperature.

(t = 온도, 단위 : ℃)

(t = temperature, unit: ℃)

However, for convenience of explanation, assuming a temperature of 14 ° C., Vs may be calculated to be about 340 m / s. In the following, it is assumed that there is no change in temperature.

FIG. 2 is a schematic diagram assuming that the sound source S and the microphones M1, M2, M3, and M4 all lie in one plane for ease of analysis. In this case, it is assumed that a free sound field environment has no echo, and the speed of the voice signal generated from the sound source _S is assumed to be V _S calculated above.

The position of the sound source S is called (Xs, Ys), and each microphone arranged in the microphone array is called M1, M2, M3, M4, respectively. The time at which the voice signal is transmitted from the sound source S to the M1 microphone is t _M , and the delay time with the signals received from the remaining microphones M2, M3, and M4 based on the signal of the M1 microphone is Δt ₁ , respectively. Δt ₂ , Δt ₃ . The distance at which the voice signal is transmitted during the time t _{M as} the reference is referred to as R, and the distances from the sound source S to M1, M2, M3, and M4 are S1, S2, S3, S4, and the distance between the microphones, respectively. If d, the distance is proportional to the product of time and speed, and this is expressed by the equations (3) to (6).

S1 = t_M V_S 이며,

S1 = t _M V _S ,

S2 = (t_M + Δt₁) V_S이며,

S2 = (t _M + Δt ₁ ) V _S ,

S3 = (t_M + Δt₁+ Δt₂) V_S 이며,

S3 = (t _M + Δt ₁ + Δt ₂ ) V _S ,

S4 = (t_M + Δt₁+ Δt₂ + Δt₃) V_S이다.

S4 = (t _M + Δt ₁ + Δt ₂ + Δt ₃ ) V _S.

Also, since the positions of the sound sources on the X and Y planes located on the plane are specified, the coordinates of the positions of the microphones are set to (X _M1 , 0), (X _M1 + d, 0), (X _M1 + 2d, 0) and Specify (X _M1 + 3d, 0), and assume that each is X _M1 -X _S ≥ 0 as shown on the plane. If this is expressed as an equation, Equations 7 to 10 are the same.

S1 ² = (X _M1 -X _S ) ² + Y _S ² ,

S2 ² = (X _M1 + dX _S ) ² + Y _S ² ,

S3 ² = (X _M1 + 2d-X _S ) ² + Y _S ² ,

S4 ² = (X _M1 + 3d-X _S ) ² + Y _S ² .

In the above Equations 3 to 10, Δt ₁ , Δt ₂ and Δt ₃ , and the distance d between the microphones, from which the exact value can be known from the experiment and the predetermined Vs, can be known. Therefore, the position (Xs, Ys) of the sound source (S) can be obtained through the system of equations (3) to (10).

For the convenience of description, the principle of location tracking of a two-dimensional sound source has been described above. However, the method of tracking a sound source using the microphone array can be solved in a similar manner even when the location of a three-dimensional sound source is tracked.

The microphone array technology of placing a plurality of microphones on a flat surface or a curved surface by using the principle of tracking the position of a sound source using the microphone array described above, and simultaneously tracking the position of the sound source at many positions is used in many parts. do.

For example, people who identify the location of sound sources (including military use) in traffic, transportation machinery, general machinery, etc., or detect mechanical abnormal signals in industrial processes, design and manufacture of the remote monitoring system at all times, video conferencing, and remote education. It is used in a wide range of fields, such as when manufacturing automatic tracking devices.

3 is a front view of the microphone array 30 described in Japanese Patent Laid-Open No. 2004-032314. As shown here, in the conventional example, a plurality of rod-shaped microphones (not shown), a mounting plate 31 of the microphone, a pair of frames 33, and a plurality of through holes 32 are provided.

 The mounting plate 31 of the microphone has a flat or curved shape, and the frame 33 supports the mounting plate 31 from both sides. The mounting plate 31 is characterized in that a plurality of through holes 32 each having the same diameter as the outer diameter of the microphone and arranged in the longitudinal direction. The microphone may be inserted into the through hole 32 to determine a position thereof.

In the above example, since the microphone can be inserted into the through hole 32 according to the number of the through holes 32, the audio signal of the sound source can be simultaneously measured at many points. In addition, by extracting the inserted microphone and inserting it into another through hole 32, the microphone can be moved to some extent, and the measurement position can be changed.

However, when the microphone is detached, the microphone mounted in the through hole 32 must be separated. In the microphone array 30 for measuring the position of the sound source, since the electric noise that may occur at the contact point of the microphone and the through hole 32 cannot be ignored, there is a problem in that the microphone is not easily detached.

As described above, the related art has some problems in the microphone array system for measuring the position of the sound source using the microphone array.

First, in the above example, when the microphone is to be changed due to a change in position of the sound source to be measured or other changes, it is difficult to respond quickly because the microphone must be detached and recombined.

Secondly, in the microphone array, when measuring the position of the sound source, a plate-like structure such as the mounting plate 31 that does not pass sound because it is necessary to measure the sound pressure without disturbing the sound field is accurate sound source measurement. This is difficult.

Third, in using the microphone array technology, it is difficult to stably position the microphone at a desired position in order to accurately measure the position of the sound source to be measured.

Fourthly, in the microphone array for measuring the position of the sound source using the microphone array, it is desirable to facilitate the position change of the microphone in order to accurately measure the position of the sound source. However, the change of position means not only the lateral movement of the microphone array, but also the mounting and detaching of the microphone in the microphone array. Therefore, in the example as described above, it is not easy to detach the microphone. Has a problem.

One object of the present invention for solving the above problems is to provide a microphone guide device that can easily change the position of the microphone in order to accurately measure the position of the sound source to be measured.

Another object of the present invention is to provide a microphone guide device disposed on a line through which the sound passes, rather than on a surface through which the sound does not pass in order to minimize the disturbance of the sound field of the sound source to be measured.

Another object of the present invention to provide a microphone guide device for stably positioning the microphone in a desired position, in order to accurately measure the position of the sound source.

Still another object of the present invention is to provide a microphone guide device that facilitates mounting, detachment and movement of the microphone from the microphone array as well as horizontal and vertical movement of the microphone to accurately measure the position of the sound source to be measured.

According to a preferred embodiment of the present invention for achieving the above object of the present invention, in the microphone array system for measuring the position of the sound source using the microphone array, the microphone guide device is arranged to couple the microphone inside And a guide unit for coupling the microphone placement unit and the microphone placement unit.

Here, the microphone arrangement unit forms the entire structure of plastic to remove electrical noise generated at the contact point between the microphone and the microphone guide device.

In more detail, the microphone placement unit includes a microphone insertion part having a through hole for mounting the microphone therein and a slide part coupled to the guide unit. The slide part includes a protruding member extending from both sides of one side of the microphone insertion part and a guide protruding member extending to a central portion of the one side such that the microphone disposition unit is movable along the guide unit.

The shape of the guide unit is linearly coupled so that the microphone placement unit is movable in the longitudinal direction of the guide unit. The guide unit has a guide rail part and a support part. The guide rail part is coupled to the slide part to allow the microphone arrangement unit to move along the guide unit, and the support part supports the guide rail part.

Here, the guide rail part includes a guide rail member extending to both sides of one side of the support part and a receiving portion for receiving the guide protruding member of the slide part so as to be engaged with the slide part. In addition, the guide rail part is characterized in that the shape complementary to the slide part.

In addition, the microphone arrangement unit is characterized in that the guide unit is simply fixed with a fixed bolt can be separated, coupled and moved.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited or limited by the embodiments.

4 is a perspective view of the microphone guide device.

As shown in the drawing, the microphone guide device 40 includes a microphone arrangement unit 100 and a guide unit 200. The microphone placement unit 100 includes a microphone insertion part 110 and a slide part 120.

The microphone insertion part 110 includes a through hole 111, a microphone 112, and a microphone fixing bolt 113.

The microphone arrangement unit 100 may remove the electrical noise generated in the through hole 111 that is the contact between the microphone 112 and the microphone arrangement unit 100 by forming the entire structure of plastic.

The microphone guide device 40 is provided with the microphone fixing bolt 113 to mount or detach the microphone 112. In addition, the microphone arrangement unit 100 other than the microphone 112 may be easily separated from the guide unit 200, thereby changing the position of the microphone arrangement unit 100 due to a change in position of the sound source or other changes. When it should be, the microphone arrangement unit 100 is movable in the longitudinal direction of the guide unit 200 to enable a quick response.

For example, when the microphone arrangement unit 100 moves to a predetermined position to measure a sound source to be measured, the microphone arrangement unit fixing bolt 122 is fastened to move the microphone arrangement unit 100 to the guide unit ( 200).

When the fixed microphone arrangement unit 100 is to be moved due to a change in sound source or a change in the surrounding environment, the microphone arrangement unit 100 may be moved after releasing the microphone arrangement unit fixing bolt 122. .

In addition, when the microphone placement unit 100 is to be separated from the guide unit 200, the microphone placement unit fixing bolt 122 may be released in a similar manner.

FIG. 5 is a cross-sectional view of the microphone guide device taken along the line VV ′ of FIG. 4.

As shown in the drawing, the microphone guide device 40 includes a microphone arrangement unit 100 and a guide unit 200. The microphone placement unit 100 includes a microphone insertion part 110 and a slide part 120 provided below the microphone insertion part 110.

The microphone insertion part 110 is provided with a through hole 111 which can be inserted into the microphone 112 and a pair of microphone fixing bolts 113 which can fix the microphone 112 from an upper direction of the microphone. do.

The through hole 111 penetrating the inside of the microphone insertion part 110 has an inner product equal to the diameter of the microphone 112 so that the microphone 112 is inserted into the through hole 111 and mounted therein. To be possible.

The slide part 120 includes a pair of protruding fixing members 121 and the protruding fixing member 121 extended to accommodate the guide unit 200 at both sides of the lower surface of the microphone insertion part 110. It is provided with a) and the microphone arrangement unit fixing bolt 122 and the guide protrusion member 123 that can fix the microphone arrangement unit 100 to the guide unit 200.

The guide protruding member 123 is inserted into the accommodating part 212 on the upper portion of the guide unit 200 to guide the microphone placement unit 100 as it moves along the guide unit 200.

The microphone placement unit fixing bolt 122 is provided below the outer side of the protruding fixing member 121, and serves to fix or release the coupling of the microphone placement unit 100 and the guide unit 200. .

The guide unit 200 includes a guide rail part 210 and a support part 220 provided below the guide rail part.

The guide rail part 210 includes a pair of guide rail members 211 and a receiving part 212. The guide rail member 211 extends upward from both sides of the upper surface of the support part 220. The guide rail member 211 is coupled to the inner surface of the protruding fixing member 121 of the microphone placement unit 100 to prevent the microphone placement unit 100 from being separated from the guide rail member 211. . In addition, the microphone arrangement unit fixing bolt 122 provided in the protruding fixing member 121 may be combined. In addition, the receiving portion 212 is complementary to the guide protrusion member 123 of the slide part 120.

FIG. 6 is an operational view showing the longitudinal movement of the guide unit of the microphone placement unit of the microphone guide device of FIG. 4.

When the microphone arrangement unit 100 is moved due to the location and change of a sound source, first, the microphone arrangement unit fixing bolt 122 is fixed, and the guide unit 200 is fixed. Accordingly, the microphone arrangement unit 100 is moved in the direction VI1 or VI2.

The guide protrusion member 123 provided in the microphone arrangement unit 100 is inserted into the receiving portion 212 provided in the guide unit 200 when the VI1 direction or the VI2 direction moves to perform the guide role to arrange the microphone. Smooth movement of the unit 100 in the VI1 direction or the VI2 direction, and the protruding fixing member 121 accommodates the guide rail part 210 so that the microphone arrangement unit 100 is external to the guide unit 200. To prevent them from leaving.

After the movement of the VI1 or VI2 direction is completed, the microphone placement unit 100 is fixed to the guide unit 200 by fastening the microphone placement unit fixing bolt 122 again.

As shown in the drawing, the guide unit 200 and the microphone arrangement unit 100 positioned on the upper portion of the guide unit 200 have complementary shapes so that the movement in the VI1 direction or the VI2 direction is free and smooth. It is invented to.

FIG. 7 is an operation diagram illustrating mounting and detachment of a microphone placement unit of the microphone guide device of FIG. 4. More specifically, it is an operation diagram showing the separation and coupling of the microphone placement unit from the guide unit.

As shown in the figure, first, the microphone arrangement unit fixing bolt 122 is fixed to the microphone arrangement unit 100 to the guide unit 200.

Thereafter, the microphone arrangement unit 100 in which the fixing is released is separated in the # 1 direction.

On the contrary, when the separated microphone placement unit 100 is coupled to the guide unit 200, the microphone placement unit 100 is attached to the microphone placement unit 100 in the Ⅶ2 direction. After coupling to the guide rail part 210, the microphone arrangement unit 100 is coupled to the guide unit 200 by fastening the microphone arrangement unit fixing bolt 122 where the coupling is released.

Complementary shapes of the slide part 120 and the guide rail part 210 provided on the guide unit 200 provided at the lower portion of the microphone arrangement unit 100 are separated from the microphone arrangement unit ( Even when the recombination of 100 is performed, the receiver 212 and the guide protrusion member 123 of the guide unit 200 are positioned to complement each other at a desired position, and the protrusion fixing member 121 is guide rail member 211. To accommodate and facilitate coupling.

As described above, the microphone guide device 40 is invented so that the microphone arrangement unit 100 can be easily mounted, detached, and moved on the guide unit 200 due to the location or change of the sound source.

As described above, according to the present invention, not only can the microphone itself be separated and moved, but also the microphone arrangement unit can be smoothly moved in the longitudinal direction of the guide unit, thereby easily changing the position of the microphone.

In addition, the microphone array unit can be formed by combining the microphone arrangement unit with a line-shaped guide unit through which sound passes, thereby minimizing the disturbance of the sound field of the sound source so that the position of the sound source can be accurately measured. It was.

In addition, the microphone is first inserted into the through hole provided in the microphone arrangement unit, the microphone fixing bolt is fixed, the microphone arrangement unit is coupled to the guide unit, and the microphone arrangement unit fixing bolt attached to the guide unit is fixed again to fix the microphone. It can arrange | position stably in a desired position.

In addition, the microphone arrangement unit is not only able to move smoothly in the longitudinal direction of the guide unit, but also is invented so that the microphone arrangement unit can be easily mounted and detached from the guide unit, thereby easily changing the position of the microphone for measuring the position of the sound source. Done.

In addition, when the microphone is moved by forming the entire structure of the microphone placement unit, the microphone is removed from the contact point of the microphone and the microphone placement unit to remove the electrical noise that may occur when the microphone is mounted, detached, and moved. Was facilitated.

As described above, although described with reference to the preferred embodiment of the present invention, those skilled in the art various modifications and variations of the present invention without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

Claims (9)

In the microphone guide system for guiding the microphone provided in the microphone array system for measuring the sound source using an array of microphones, Guide unit; Microphone placement unit for placing a microphone including a microphone insertion part having a through hole through which the microphone can be inserted therein and a slide part provided on one side of the microphone insertion part to engage with the guide unit ; And And the slide part is Protruding members extended to accommodate and fix the guide unit on both sides of one side of the microphone insertion part; And A guide protrusion member extended to a central portion of the one side such that the slide part is movable along the guide unit; Is provided, The guide unit includes a guide rail part for coupling to the microphone arrangement unit, The guide rail part, Guide rail members extending to both sides of one side of a support part supporting the guide rail part so as to be engaged with the slide part; And Receiving portion that can receive the guide protrusion member; Microphone guide device comprising a. The method of claim 1, And the microphone placement unit is made of plastic. delete delete The method of claim 1, The guide unit is formed in a linear shape, the microphone guide unit characterized in that the microphone arrangement unit is coupled to be movable in the longitudinal direction of the guide unit. The method of claim 5, The guide unit A support part supporting the guide rail part; Microphone guide device comprising a. delete delete The method of claim 1, And the microphone placement unit enables detachment and coupling from the guide unit.

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