JP5275833B2 - Oscillator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an oscillator which takes a measurement by guiding a pressure wave to a measurement place when the oscillation direction and oscillation range of the pressure wave are optionally changed or when a place which cannot be measured directly by the pressure wave generator is measured. <P>SOLUTION: The oscillator is characterized in that the pressure wave oscillated by a conventional pressure wave generator etc. is propagated through a non-compressive liquid and the pressure wave thus propagated is sent to the outside. Further, the oscillator may have a case in a spherical shape or polyhedral shape. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an oscillator that generates a pressure wave such as a sound wave, and more particularly, to an oscillator suitable for changing the oscillation direction and oscillation range of a pressure wave.

  2. Description of the Related Art Conventionally, in offshore construction and civil engineering work, it is often performed to apply sound waves or the like for measurement for distance measurement or the like. In particular, there are many examples of using sound waves for positioning in water (for example, Patent Document 1). Examples of the sound wave generator in water include a ceramic oscillator and an underwater speaker.

JP 2004-151036 A JP-A-6-201666

  However, since the above-described commercially available sound wave generator is manufactured according to the design specifications, the direction and range in which the sound wave is oscillated is fixed and cannot be easily changed according to the situation of the construction site. For example, if the object positioning range is wider than originally planned, it will be necessary to expand the radiation range of the sound wave. However, at present, a new sound wave oscillator must be manufactured and installed separately. . In addition, there is a problem that when a sound wave oscillator is long, it cannot be put sideways when it is inserted into a thin hole such as a boring hole and a sound wave is oscillated on the side surface (circumferential direction) of the hole.

  Therefore, in order to solve the above-mentioned problem, the present invention can arbitrarily change the oscillation direction and the oscillation range of the pressure wave oscillated from the pressure wave generator or the like, or can directly measure by installing the pressure wave generator. An object of the present invention is to provide an oscillator that guides and measures a pressure wave to a measurement location when it is desired to measure a location where it cannot be performed.

In order to solve the above problems, the present invention provides a pressure wave oscillating means for oscillating a pressure wave, a propagation means for propagating the oscillated pressure wave through an incompressible liquid, and the pressure wave that has propagated. And an oscillating means for emitting the pressure wave to the outside, and an oscillator characterized in that the oscillation directions of the pressure waves in the pressure wave oscillating means and the oscillating means are different directions .

  Here, gas such as air is compressible and has the property of shrinking when put in a sealed container and applying pressure, but liquid such as oil is incompressible and has the property of hardly shrinking even when pressure is applied. Have. The oscillator according to the present invention utilizes such a property of the incompressible substance, and propagates the pressure wave oscillated from the pressure wave oscillating means through the incompressible liquid and oscillates externally from the oscillating means. .

  This configuration changes the oscillation direction and range of the pressure wave oscillated from the pressure wave generator, etc. or guides the pressure wave to a place where it cannot be measured directly by installing the pressure wave generator. It is possible.

In addition, as an oscillation direction of the pressure wave in the pressure wave oscillation unit and the oscillation unit , for example, both directions can be orthogonal to each other.

  With this configuration, it is possible to change the oscillation direction of the pressure wave oscillated from the pressure wave generator or the like according to the situation at the construction site.

  The pressure wave oscillating means may be constituted by a magnetic oscillator.

  With this configuration, it is possible to change the oscillation direction of the pressure wave oscillated from the conventional magnetic type oscillator, or to measure a place that cannot be directly measured by installing the magnetic type oscillator.

  The oscillator may include a casing, the casing may contain the incompressible liquid therein, and the pressure wave oscillation unit and the vibration unit may be fixed.

  This configuration changes the oscillation direction and range of the pressure wave oscillated from the pressure wave generator, etc. or guides the pressure wave to a place where it cannot be measured directly by installing the pressure wave generator. It is possible.

  The casing may be spherical.

  With this configuration, it is possible to change the oscillation direction of the pressure wave oscillated from the pressure wave generator or the like in all directions (nondirectionality).

  Further, the casing may have a polyhedral shape.

  With this configuration, it becomes easy to change the oscillation direction of the pressure wave oscillated from the pressure wave generator to a different direction. In other words, a pressure wave is input from one surface of the polyhedron, the input pressure wave propagates through the incompressible liquid inside the housing, and oscillates from the other surface to the outside, thereby changing the oscillation direction of the pressure wave. It can be easily changed.

  Moreover, the said housing | casing may be comprised with the metal.

  With this configuration, the pressure wave oscillated by the pressure wave oscillating means is difficult to attenuate and easily propagates to the oscillating means.

  As described above, according to the present invention, the location of the pressure wave oscillated from the pressure wave generator or the like cannot be directly measured by changing the oscillation direction or range of the pressure wave or installing the pressure wave generator. When it is desired, the pressure wave generated from the pressure wave generator can be guided to the measurement location and measured.

1 is a diagram illustrating an oscillator according to a first embodiment. It is a figure which shows the oscillator which concerns on 2nd Embodiment. It is a figure which shows the oscillator which concerns on 3rd Embodiment. It is sectional drawing of the oscillator which concerns on 4th Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a diagram illustrating an oscillator according to the first embodiment. FIG. 1A is a view showing the appearance of the oscillator, and FIG. 1B is a longitudinal sectional view of the oscillator.

  As shown in FIGS. 1A and 1B, the oscillator according to the present embodiment includes a cylindrical casing 11 so as to block a hole 11 a formed in a part of the peripheral surface of the casing 11. A rubber plate 13 is fixed to the upper surface of the housing 11 and a vibration plate 113 is fixed to the upper surface of the housing 11.

  A magnetic oscillator 14 is provided on the opposite side of the casing 11 with the diaphragm 113 interposed therebetween.

  Note that the inside of the housing 11 is filled with oil 12, and the rubber plate 13 and the diaphragm 113 are attached to the housing 11 in a liquid-tight manner.

  The magnetic oscillator 14 is a general one, and a magnet 112 in which a coil 111 is wound with a gap so as to be relatively displaceable is housed in the magnetic oscillator 14. The coil 111 is fixed to the diaphragm 113 while being fixed to the inner bottom surface.

  When the current supplied from the power supply 114 flows to the coil 111 via the drive circuit 115, a vertical force is generated on the diaphragm 113 in accordance with Fleming's left-hand rule, which causes the diaphragm 113 to vibrate. To do. This vibration is propagated to the rubber plate 13 through the oil 12, and the rubber plate 13 vibrates to generate a sound wave outside.

  With the mechanism as described above, the oscillation direction of the sound wave oscillated in the vertical direction from the magnetic oscillator 14 can be changed in the horizontal direction by the rubber plate 13.

  The diaphragm 113 is ideally made of a material that is lightweight, has high rigidity, has an appropriate internal loss, and has a high pressure wave propagation speed, like a diaphragm such as a general speaker. Specific examples include wood pulp, synthetic resin materials, metal materials such as titanium and aluminum, and the like.

  Further, the rubber plate 13 plays a role of emitting sound waves to the outside by vibrating with sound waves propagating through the oil 12. Therefore, instead of the rubber plate 13, it may be made of a material that is lightweight, has high rigidity, has an appropriate internal loss, and has a high pressure wave propagation speed, like the diaphragm 113. Specific examples include wood pulp, synthetic resin materials, and metal materials such as titanium and aluminum.

  Moreover, it is preferable that the housing | casing 11 is a material with high rigidity, for example, may be comprised from metals, such as iron. As a result, the pressure wave oscillated from the magnetic oscillator 14 is not easily attenuated and easily propagates to the rubber plate 13.

  Further, since the oscillator according to the present embodiment is assumed to be used in water or in the soil, the casing 11, the outer surface of the magnetic oscillator 14, and the rubber plate 13 are waterproofed or waterproofed. It is desirable that

  Further, since the inside of the oscillator is filled with oil 12 which is an incompressible liquid, in principle, the oscillator can be used without any limitation on water depth.

(Second Embodiment)
FIG. 2 is a diagram illustrating an oscillator according to the second embodiment. FIG. 2A is a view showing the appearance of the oscillator, and FIG. 2B is a longitudinal sectional view of the oscillator.

  As shown in FIGS. 2A and 2B, the oscillator according to the present embodiment includes a casing 21 including a disc 21a and a plurality of support columns 21b provided on a peripheral portion of the disc 21a. The rubber plate 23 forms a circumferential surface inside the support column 21b so as to form a cylindrical shape with the circular plate 21a as a bottom surface, and a vibration plate 113 is fixed to the cylindrical upper surface.

  A magnetic oscillator 14 is provided on the opposite side of the casing 21 across the diaphragm 113. The opposite end of the column 21 b of the housing 21 is fixed to the magnetic transmitter 14.

  The region surrounded by the disk 21 a and the rubber plate 23 of the oscillator housing 21 is filled with oil 22, and the rubber plate 23 and the vibration plate 113 are liquid-tightly attached to the housing 21. Yes. The configuration and operation mechanism of the magnetic oscillator 14 are the same as those of the magnetic oscillator shown in FIG.

  In the oscillator according to this embodiment, since the entire cylindrical peripheral surface is constituted by the rubber plate 23, sound waves are oscillated in the circumferential direction by the vibration propagated to the rubber plate 23.

(Third embodiment)
FIG. 3 is a diagram illustrating an oscillator according to the third embodiment. FIG. 3A is an external view of the oscillator, and FIG. 3B is a cross-sectional view of the oscillator.

  As shown in FIGS. 3A and 3B, the oscillator according to this embodiment includes a cylindrical casing 31 and closes an opening 31 a provided in a part of the peripheral surface of the casing 31. Thus, the rubber plate 33 is fixed. The inside of the casing 31 of the oscillator is filled with oil 32, and the rubber plate 33 is attached to the casing 31 in a liquid-tight manner.

  The magnetic oscillator 14 is housed inside an oscillator casing 31, and the sound wave oscillated from the magnetic oscillator 14 is propagated through the oil 32 and the rubber plate 33 vibrates. In FIG. 3A, the power source 114 and the drive circuit 115 are installed outside the casing 31 of the oscillator, but may be housed inside the casing 31. The configuration and operation mechanism of the magnetic oscillator 14 are the same as those of the magnetic oscillator shown in FIG.

  In the oscillator according to the present embodiment, the rubber plate 33 is limited to the half-circumferential portion of the peripheral surface of the cylindrical housing 31. Thereby, the vibration oscillated from the magnetic oscillator 14 is propagated through the oil 32, and the sound wave is oscillated outside only from the circumferential half portion where the rubber plate 33 is provided.

(Fourth embodiment)
FIG. 4 is a longitudinal sectional view of an oscillator according to the fourth embodiment. In the oscillator shown in FIG. 4A, the vibration directions of the vibration plate 113 and the rubber plate 43 are the same, and in the oscillator shown in FIG. 4B, the vibration directions of the vibration plate 113 and the rubber plate 43 are orthogonal to each other. It has become.

  As shown in FIGS. 4A and 4B, the oscillator according to the present embodiment includes a housing 41, and a rubber plate 43 is fixed so as to close a hole 41a provided in a part of the housing 41. Has been. The casing 41 is connected to the magnetic oscillator 14 so as to be integrated, and the diaphragm 113 is fixed inside the magnetic oscillator 14.

  On the opposite side of the casing 41 with the diaphragm 113 in between, a magnet 112 is housed in which the coil 111 is wound with a gap so as to be relatively displaceable from each other. The coil 111 is fixed to the diaphragm 113 while being fixed to the inner bottom surface.

  The inside of the casing 41 of the oscillator is filled with oil 42, and the rubber plate 43 and the diaphragm 113 are attached to the casing 41 in a liquid-tight manner.

  The oscillator shown in FIGS. 4A and 4B is configured to have a considerable distance between the diaphragm 113 and the rubber plate 43. With such a configuration, for example, even in a measurement location where there is no space for directly installing a magnetic oscillator or the like, the oscillator according to this embodiment is installed so that the portion of the rubber plate 43 hits the measurement location. In addition, distance measurement using sound waves can be performed.

  Furthermore, the oscillator shown in FIG. 4B is configured such that the vibration directions of the vibration plate 113 and the rubber plate 43 are different. For this reason, for example, when inserting into a thin hole such as a boring hole to generate a sound wave on the side surface (circumferential direction) of the hole, the housing 41 is inserted into the boring hole, and the rubber plate 43 An oscillator should be installed so that the part hits.

  In the above embodiment, the magnetic oscillator 14 corresponds to the “pressure wave oscillating means” in the present invention. The rubber plates 13, 23, 33, and 43 correspond to “vibrating means” in the present invention.

  In the above embodiment, the oils 12, 22, 32, and 42 correspond to the “incompressible liquid” in the present invention.

(Other embodiments)
In the above embodiment, the case where the oil 12 or the like is used as the incompressible liquid has been shown, but other incompressible liquid such as mercury may be used.

  The shape of the oscillator may be a spherical shape, a hemispherical shape, a polyhedral shape, or the like. For example, when the oscillator has a spherical shape and the entire circumferential surface is made of a rubber material, and a pressure wave generator is provided inside the oscillator, the pressure wave oscillated from the pressure wave generator The oscillation direction can be changed to all directions (omnidirectional).

(Summary)
As described above, according to the present invention, the location of the pressure wave oscillated from the pressure wave generator or the like cannot be directly measured by changing the oscillation direction or range of the pressure wave or installing the pressure wave generator. When it is desired, the pressure wave generated from the pressure wave generator can be guided to the measurement location and measured. Further, the oscillator according to the present invention is structurally simple, can be configured without using a special material, and can be realized at low cost.

11, 21, 31, 41 Housing 12, 22, 32, 42 Oil 13, 23, 33, 43 Rubber plate 14 Magnetic oscillator 11a, 41a Hole 111 Coil 112 Magnet 113 Diaphragm 114 Power source 115 Drive circuit 21a Disc 21b Post 31a Opening

Claims (6)

Pressure wave oscillating means for oscillating a pressure wave;
Propagation means for propagating the oscillated pressure wave through the incompressible liquid;
Vibrating means for emitting the pressure wave that has propagated to the outside, and
An oscillator characterized in that the pressure wave oscillating means and the oscillating means have different directions of oscillation of the pressure wave . 2. The oscillator according to claim 1, wherein the pressure wave oscillating means is constituted by a magnetic oscillator. The oscillator has a housing,
Wherein the housing accommodates the non-compressible liquid therein, further, the in the housing, according to claim 1 or 2, wherein the pressure wave oscillation means and said oscillation means is characterized in that it is fixed Oscillator. The oscillator according to claim 3 , wherein the casing has a spherical shape. The oscillator according to claim 3 , wherein the casing has a polyhedral shape. Wherein the housing, the oscillator according to claims 3 to any one of the 5, characterized in that it is made of metal.

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