CN101900827B - Acoustic detection device - Google Patents

Abstract

The invention provides an acoustic detection device, which comprises a transmitter, a receiver and a sound insulator, wherein the sound insulator is arranged between the transmitter and the receiver and is provided with an outer shell and an axle; and the outer shell and/or the axle are/is provided with at least one interlayer and the acoustic incident surface of the interlayer does not parallel to the acoustic emergent surface of the interlayer.

Description

Acoustic detection device

Technical field

The application relates to acoustic detection device, especially relates to the sound insulator of acoustic detection device.

Background technology

Acoustic detection device is generally made up of transmitter, receiver, sound insulator and electronic circuit part.Sound insulator is the physical construction that connects transmitter and receiver.The design of sound insulator should be considered the requirement of strength of mechanical connection, more will consider the defening effect for sound wave.For the evaluation of defening effect, there are two physical quantitys: acoustic attenuation intensity and sound lag amount.The energy attenuation size of a certain component that acoustic attenuation intensity refers to sound wave under characteristic frequency, measures with decibel (dB).Sound lag amount refers to the speed that sound wave is propagated on sound insulator, measures by slowness (S/M).On the sound insulator of acoustic detection device, there are two places will carry out the sound insulation design of emphasis and process.One place is the shell of sound insulator.The acoustic wave energy of transmitting transducer transmitting is delivered to and is surveyed stratum by the coupling of silicone oil and leather bag, and shell can be directly delivered to receiving transducer by shell rigid body by the energy of transmitting.Because the acoustic characteristic of sheathing material itself (propagate slowness less, propagation attenuation is less), so the acoustic vibration of this direct propagation has very serious implications for measurement.An other place is the axle of sound insulator.This axle is the physical construction that directly connects transmitting transducer and receiving transducer, and the obstructed overcoupling of acoustic vibration has directly just been delivered to receiving transducer from axle, therefore also has larger impact for Receiver Precision.

Fig. 2 shows the stretch-out view of the sound insulator shell of traditional acoustic detection device.As shown in the figure, on the shell 1 of tradition sound insulator, be evenly distributed with multiple grooves 2, this groove 2 be shaped as rectangle, each relative edge of this rectangle is parallel to each other, and spacing A between any two-layer adjacent slot in the Acoustic Wave Propagation direction from pinger to acoustic receiver equates.

Fig. 3 shows the stretch-out view of the sound insulation axon of traditional acoustic detection device.As shown in the figure, on the axle 3 of tradition sound insulator, be evenly distributed with multiple grooves 4, this groove 4 be shaped as rectangle, each relative edge of this rectangle is parallel to each other, and the spacing A1 between any two-layer adjacent slot in above-mentioned Acoustic Wave Propagation direction equates, is conventionally also coated with one deck rubber layer at the outside surface of this axle.

The sound insulator of the traditional acoustic detection device being made up of above-mentioned shell and axle exists the undesirable problem of defening effect, therefore directly causes the precision of acoustic detection device can not be satisfactory.

Summary of the invention

The invention provides the acoustic detection device with improved performance, the sound insulator with improved performance in acoustic detection device inside is especially provided.In the time that sound insulator of the present invention has the length identical with traditional sound insulator, its defening effect is better than the defening effect of traditional sound insulator, and in the time that sound insulator of the present invention has the defening effect identical with traditional sound insulator, it is shorter in length than the length of traditional sound insulator.

Acoustic detection device provided by the invention comprises transmitter, receiver and sound insulator, wherein said sound insulator is between described transmitter and described receiver, described sound insulator at least has shell and axle, it is characterized in that: on described shell, there are multiple grooves, described groove has the sound wave plane of incidence and sound wave exit facet in the Acoustic Wave Propagation direction from described transmitter to described receiver, and the described sound wave plane of incidence and described sound wave exit facet are not parallel to each other.

The present invention also provides a kind of acoustic detection device, it comprises transmitter, receiver and sound insulator, wherein said sound insulator is between described transmitter and described receiver, described sound insulator has axle, it is characterized in that: on described axle, there are multiple grooves, described groove has the sound wave plane of incidence and sound wave exit facet in the Acoustic Wave Propagation direction from described transmitter to described receiver, and the described sound wave plane of incidence and described sound wave exit facet are not parallel to each other.

The present invention also provides a kind of acoustic detection device, it comprises transmitter, receiver and sound insulator, wherein said sound insulator is between described transmitter and described receiver, described sound insulator at least has shell and axle, it is characterized in that: described shell is made up of at least three sub-housings on the Acoustic Wave Propagation direction from described transmitter to described receiver, the material difference of adjacent sub-housing, except be positioned at head and the tail position sub-housing other sub-housings in described Acoustic Wave Propagation direction, there is the sound wave plane of incidence and sound wave exit facet, the described sound wave plane of incidence and described sound wave exit facet are not parallel to each other.

The present invention also provides a kind of acoustic detection device, it comprises transmitter, receiver and sound insulator, wherein said sound insulator is between described transmitter and described receiver, described sound insulator has axle, it is characterized in that: described axle is made up of at least three sub-axis bodies on the Acoustic Wave Propagation direction from described transmitter to described receiver, the material difference of adjacent sub-axis body, except be positioned at head and the tail position sub-axis body other sub-axis bodies in described Acoustic Wave Propagation direction, there is the sound wave plane of incidence and sound wave exit facet, the described sound wave plane of incidence and described sound wave exit facet are not parallel to each other.

Brief description of the drawings

Fig. 1 shows sound wave vertically through the physical characteristics schematic diagram in middle layer;

Fig. 2 shows the stretch-out view of traditional sound insulator shell;

Fig. 3 shows the stretch-out view of traditional sound insulation axon;

Fig. 4 shows according to the stretch-out view of the sound insulator shell of the embodiment of the present invention one;

Fig. 5 shows according to the stretch-out view of the sound insulation axon of the embodiment of the present invention two;

Fig. 6 shows according to the cut-open view of the sound insulator shell of the embodiment of the present invention three;

Fig. 7 shows according to the cut-open view of the sound insulation axon of the embodiment of the present invention four;

Fig. 8 shows according to the cut-open view of the axle of the sheathed parallel pad of the embodiment of the present invention five;

Fig. 9 shows according to the cut-open view of the axle of the sheathed non-parallel pad of the embodiment of the present invention six;

Figure 10 shows according to the front elevation of the axle of sheathed pad of the present invention;

Figure 11 shows according to the comparison diagram of the defening effect of cutting scheme of the present invention and traditional cutting scheme.

Embodiment

On housing or axle, cutting is the Basic Ways of design sound insulator.The physical model of these Basic Ways is exactly the middle layer of sound wave through different medium.First this instructions will analyze the physical characteristics of sound wave through middle layer.

As shown in Figure 1, being provided with a thickness is that D, characteristic impedance are Z ₂=ρ ₂v ₂middle layer medium to be placed in characteristic impedance be Z ₁=ρ ₁v ₁infinite medium in, the density that wherein ρ is medium, v is the velocity of sound in medium.As a row plane sound wave (p ₁, v ₁) while impinging perpendicularly on interface, middle layer, a part reflects back in the medium on the left side, middle layer, has formed reflection wave (p _1r, v _1r); Another part penetrates middle layer, is designated as (p _2t, v _2t).As sound wave (p _2t, v _2t) while advancing on another interface in middle layer, due to the change of characteristic impedance, can some be reflected back in middle layer again, be designated as (p _2r, v _2r), remainder just penetrates the Z on the right side, middle layer ₁=ρ ₁v ₁in medium, go, be designated as (p _t, v _t).Because the medium on the right side, middle layer here extends to infinity, so transmitted wave (p _t, v _t) can not reflect again, above-mentioned p is acoustic pressure.

Sound field in the medium on the left side, middle layer is exactly (p ₁, v ₁) and (p _1r, v _1r) stack, the sound field in middle layer is exactly (p _2t, v _2t) and (p _2r, v _2r) stack, the sound field in the medium on the right side, middle layer is only just (p _t, v _t).The size of determining reflection and transmission with the acoustic condition on border, left and right, middle layer, can obtain sound intensity transmission coefficient $t_I=\frac{4}{4{\cos }^2{k}_{2}D+{(Z_{12}+Z_{21})}^2{\sin }^2{k}_{2}D}$ And reflection sound intensity r _i=1-t _i.In formula, $Z_{12}=\frac{Z_2}{Z_1},$ $Z_{21}=\frac{Z_1}{Z_2},$ K ₂=ω/v, wherein ω is that frequency, v are the velocity of sound, k ₂for wave number.

This result shows, the size that the reflection of sound wave during by middle layer involves transmitted wave not only with the characteristic impedance Z of two kinds of mediums ₁, Z ₂relevant, but also relevant with the ratio of the wavelength of wherein propagating with the thickness in middle layer $(k_{2}D=\frac{\mathrm{\ω}}{v_2}D=\frac{2\mathrm{\πD}}{{\mathrm{\λ}}_2}).$

A. work as k ₂d < < 1, now cosk ₂d ≈ 1, sink ₂d ≈ 0, can obtain t _i≈ 1.This shows, in the time that wave length of sound is far longer than intermediate layer thickness, sound wave is total transmissivity almost.

B. work as k ₂d=n π=1,2,3 ...), now cosk ₂d ≈ 1, sink ₂d ≈ 0, can obtain t _i≈ 1.This shows, in the time that intermediate layer thickness is half-wavelength integral multiple, sound wave is total transmissivity almost.

C. work as $k_{2}D=(2n-1)\frac{\mathrm{\&pi;}}{2},$ (n=1,2,3 ...), Z ₁< < Z ₂, now t _i≈ 0.This shows, when intermediate layer thickness is when wavelength odd-multiple, sound wave almost can not see through completely, and middle layer has cut off sound wave.

If the direction of propagation of plane sound wave is not perpendicular to middle layer, but there is a namely oblique incidence of angle with interfacial normal, just the same when the big or small disposal route of acoustic reflection and transmission is in principle with vertical incidence so in this case, different just will apply now along the plane wave expression P=P of space any direction propagation _ae ^{j (ω t-kx cos α-ky cos β-kx cos γ)}, in this formula, P is acoustic pressure, the amplitude scalar part that Pa is acoustic pressure, and α, β, γ determine the direction of spatial, and relation between the acoustic pressure of each train wave and normal direction particle velocity also should be used general:

$v_x=-\frac{1}{{\mathrm{\&rho;}}_0}\&Integral;\frac{\&PartialD;p}{\&PartialD;x}\mathrm{dt}=\frac{\cos \mathrm{\&alpha;}}{{\mathrm{\&rho;}}_0{c}_0}p$

$v_y=-\frac{1}{{\mathrm{\&rho;}}_0}\&Integral;\frac{\&PartialD;p}{\&PartialD;y}\mathrm{dt}=\frac{\cos \mathrm{\&beta;}}{{\mathrm{\&rho;}}_0{c}_0}p$

$v_z=-\frac{1}{{\mathrm{\&rho;}}_0}\&Integral;\frac{\&PartialD;p}{\&PartialD;z}\mathrm{dt}=\frac{\cos \mathrm{\&gamma;}}{{\mathrm{\&rho;}}_0{c}_0}p$

In above formula, v _x, v _y, v _zfor space any point particle velocity is along the component of X, Y, tri-coordinate directions of Z.

Reflecting acoustic pressure when similar mode can be tried to achieve oblique incidence when with vertical incidence and the magnitude relationship of transmission acoustic pressure.

Here needn't remake loaded down with trivial details derivation, we only should be noted two kinds of results when vertical incidence and when oblique incidence on two kinds of unlimited interphases that extend mediums of sound wave: $r_p=\frac{Z_2-Z_1}{Z_2+Z_1},$ $r_v=\frac{Z_1-Z_2}{Z_2+Z_1},$ $t_p=\frac{{2Z}_2}{Z_2+Z_1},$ $t_v=\frac{{2Z}_1}{Z_2+Z_1}$ And $r_p=\frac{z_{s2}-z_{s1}}{z_{s2}+z_{s1}},$ $r_v=\frac{z_{s1}-z_{s2}}{z_{s2}+z_{s1}},$ $t_p=\frac{{2z}_{s2}}{z_{s2}+z_{s1}},$ $t_v=\frac{{2z}_{s1}}{z_{s2}+z_{s1}},$ In above formula, $z_{s1}=\frac{{\mathrm{\&rho;}}_1{c}_1}{\cos \mathrm{\&theta;}},$ $z_{s2}=\frac{{\mathrm{\&rho;}}_2{c}_2}{\cos \mathrm{\&theta;}}$ Be called specific normal acoustic impedance; t _pfor sound pressure transmission coefficient, r _pfor sound pressure reflection coefficient, t _vfor velocity of sound transmission coefficient, r _vfor velocity of sound reflection coefficient.Specific normal acoustic impedance Z when their difference is only oblique incidence _sspecific acoustic impedance Z while having replaced vertical incidence, so now also can be according to the result that is normally incident in middle layer $t_p=\frac{2}{{[4{\cos }^2{k}_{2}x+{(\frac{z_2}{z_1}+\frac{z_1}{z_2})}^2{\sin }^2{k}_{2}x]}^{1/2}}$ And $t_I=\frac{4}{[4{\cos }^2{k}_{2}x+{(\frac{z_2}{z_1}+\frac{z_1}{z_2})}^2{\sin }^2{k}_{2}x]},$ Use simply specific normal acoustic impedance Z _sreplace the specific acoustic impedance Z in former formula, and with wave vector the component in x direction $k_2^t=k_2\cos {\mathrm{\&theta;}}_{2t}$ Replace the wave number k in former formula ₂, wherein θ _2tfor the angle of wave vector and x direction, so directly obtain the sound pressure transmission coefficient t of sound wave oblique incidence on middle layer time _pand sound intensity transmission coefficient t ₁for:

$\left.\begin{array}{c}{t}_p=\frac{p_{\mathrm{ta}}}{p_{\mathrm{ia}}}=\frac{2}{{[4{\cos }^2{k}_2^{\&prime;}D+{(\frac{z_2}{z_1}+\frac{z_1}{z_2})}^2{\sin }^2{k}_2^{\&prime;}D]}^{{1/2}^{\&prime;}}}\\ t_I=\frac{I_t}{I_i}=\frac{4}{{[4{\cos }^2{k}_2^{\&prime;}D+{(\frac{z_2}{z_1}+\frac{z_1}{z_2})}^2{\sin }^2{k}_2^{\&prime;}D]}^{\&prime;}}\end{array}\right\}$

In above formula $Z_2=\frac{{\mathrm{\&rho;}}_2{c}_2}{\cos {\mathrm{\&theta;}}_2},$ $Z_1=\frac{{\mathrm{\&rho;}}_1{c}_1}{\cos {\mathrm{\&theta;}}_1},$ Wherein θ ₁with θ ₂for the refraction angle in middle layer.

Above at length set forth theoretical foundation of the present invention, next specifically described various embodiments of the present invention in connection with each accompanying drawing.

Embodiment mono-:

The present embodiment is that the shell of sound insulator is improved, and the set-up mode of this shell as shown in Figure 4.

In Fig. 4, Reference numeral 1 represents the shell of the sound insulator of acoustic detection device, on this shell 1, be carved with multiple grooves 2 ', this groove 2 ' be shaped as deforming triangle (groove width is for example 5mm), for example, spacing A between any two-layer adjacent slot 2 ' in the Acoustic Wave Propagation direction from pinger to acoustic receiver (horizontal direction in Fig. 4) is (for example 10mm or the 16mm) equating, described spacing A is: in any two-layer adjacent slot in above-mentioned Acoustic Wave Propagation direction, from more approach comparatively speaking pinger one deck groove away from one end of pinger to the distance one end that approaches pinger most of another layer of groove.

The shape of above-mentioned groove 2 ' is not limited to deforming triangle, can also adopt other shapes, such as trapezoidal etc., as long as this shape can make this groove in above-mentioned Acoustic Wave Propagation direction not have the surface being parallel to each other.

Here it should be noted that, multiple grooves of scribing on shell have in the present embodiment formed multiple middle layers of this shell, and air in groove forms the medium in this middle layer.In the propagation process of sound wave from pinger to acoustic receiver, plane sound wave will pass each groove as middle layer.Because each groove in the present embodiment does not have the surface being parallel to each other in Acoustic Wave Propagation direction, each sound wave plane of incidence as the groove in middle layer and sound wave exit facet are not parallel, so can produce the defening effect that is better than prior art.

In addition, when the sound insulator of the present embodiment is during for the down-hole sniffer of acoustical well-logging devices, the mud producing in drilling process can each groove of filling, and so now mud has just formed middle layer medium.Certainly, technician can also need to select to carry out each groove of filling with other materials such as rubber, resin, leads according to actual design, to construct the middle layer of various different mediums.

The present embodiment is by improving the set-up mode of groove on shell, and the plane sound wave that makes to propagate into acoustic receiver from pinger incides groove in the mode that is an angle (being preferably acute angle) with the normal of the sound wave plane of incidence of the groove as described middle layer, thereby can improve the sound-insulation capability of sound insulator, then make the measurement result of acoustic detection device more accurate.

Embodiment bis-:

The present embodiment is that the axle of sound insulator is improved, and the set-up mode of this axle as shown in Figure 5.

In Fig. 5, Reference numeral 3 represents the axle of the sound insulator of acoustic detection device, on this axle 3, be carved with multiple grooves 4 ', this groove 4 ' be shaped as deforming triangle (groove width is for example 5mm), for example, spacing A1 between any two-layer adjacent slot 4 ' in the Acoustic Wave Propagation direction from pinger to acoustic receiver (horizontal direction in Fig. 5) is (for example 10mm or the 16mm) equating, described spacing A1 is: in any two-layer adjacent slot in above-mentioned Acoustic Wave Propagation direction, from more approach comparatively speaking pinger one deck groove away from one end of pinger to the distance one end that approaches pinger most of another layer of groove

The shape of groove 4 ' is also not limited to deforming triangle herein, can also adopt other shapes, such as trapezoidal etc., as long as this shape can make this groove in described Acoustic Wave Propagation direction not have the surface being parallel to each other.

With embodiment mono-in like manner, multiple grooves of scribing on axle in the present embodiment have also formed multiple middle layers taking air as medium of this axle, the sound wave plane of incidence and the sound wave exit facet of this groove as middle layer in Acoustic Wave Propagation direction is not parallel; Preferably, this as also can filling silicon oil in the groove in middle layer, the other materials such as rubber, resin, lead, further to improve defening effect.

The present embodiment is by improving the set-up mode of groove on axle, and the plane sound wave that makes to propagate into acoustic receiver from pinger incides groove in the mode that is an angle (being preferably acute angle) with the normal of the sound wave plane of incidence of the groove as middle layer, thereby also can improve the sound-insulation capability of sound insulator, then also make the measurement result of acoustic detection device more accurate.

Embodiment tri-:

Embodiment mono-and two is by forming multiple its sound wave planes of incidence and the uneven middle layer of sound wave exit facet with the cutting on shell and/or axle of above-mentioned ad hoc fashion on shell and/or axle, thereby the plane sound wave that makes to propagate into acoustic receiver from pinger incides described middle layer in the mode that is an angle (being preferably acute angle) with the normal of the sound wave plane of incidence in described middle layer, then improves defening effect.The present embodiment is, by another kind of mode, its sound wave plane of incidence and the uneven middle layer of sound wave exit facet are set on shell.

Shell in the present embodiment is not integrally formed, but is made up of multiple sub-housings.

As shown in Figure 6, shell 1 is made up of three sub-housings 11,12,13, and its neutron housing 12 is middle layer, and it has sound wave plane of incidence S _inwith sound wave exit facet S _out, this sound wave plane of incidence S _inwith sound wave exit facet S _outnot parallel each other, and all not identical with the material of the sub-housing 11 and 13 adjacent with it as the material of the sub-housing 12 in middle layer, and the material of sub-housing 11 and 13 can be identical, also can be different, that is to say, as long as the material of two adjacent sub-housings is different; For example, sub-housing 12 can be made up of rubber, and sub-housing 11 and 13 can form by steel.

Although only show the shell being made up of three sub-housings in the present embodiment, the present invention is not limited to this.Those skilled in the art can need to select to form shell more than the sub-housing of three according to actual design, now, other sub-housings except being positioned at two sub-housings of head and the tail position can be considered as multiple middle layers, and the material of adjacent sub-housing is not identical.In addition, form between the sound wave plane of incidence of each sub-housing in each middle layer and sound wave exit facet and be not parallel to each other, the described sound wave plane of incidence and/or sound wave exit facet can be planes, can be also concave surface, convex surface or male and fomale(M&F).The connected modes such as that each sub-housing can adopt is bonding, riveted joint are connected as a single entity.

In sum, the present embodiment improves by the make to shell, make shell in above-mentioned Acoustic Wave Propagation direction, there is at least one its sound wave plane of incidence and the uneven middle layer of sound wave exit facet, and plane sound wave is incided in described middle layer in the mode that is an angle (being preferably acute angle) with the normal of the sound wave plane of incidence in described middle layer, thereby also can improve the sound-insulation capability of sound insulator, then also make the measurement result of acoustic detection device more accurate.

Embodiment tetra-:

The present embodiment is the axle of sound insulator is improved with the similar mode of embodiment tri-.

As shown in Figure 7, axle 3 is made up of three sub-axis bodies 31,32,33, and its neutron axis body 32 is middle layer, and it has uneven sound wave plane of incidence S each other _inwith sound wave exit facet S _out.All not identical with the material of the sub-axis body 31 and 33 adjacent with it as the material of the sub-axis body 32 in middle layer, and the material of sub-axis body 31 and 33 can be identical, also can be different, that is to say, as long as the material of two adjacent sub-axis bodies is different; For example, sub-axis body 32 can be made up of rubber, and sub-axis body 31 and 33 can form by steel.

With embodiment tri-in like manner, those skilled in the art can need to select to form axle more than the sub-axis body of three according to actual design, now, other the sub-axis bodies except being positioned at two sub-axis bodies of head and the tail position can be considered as multiple middle layers, and the material of adjacent sub-axis body is not identical.In addition, form between the sound wave plane of incidence of each sub-axis body in each middle layer and sound wave exit facet and be also not parallel to each other, the described sound wave plane of incidence and/or sound wave exit facet can be planes, can be also concave surface, convex surface or male and fomale(M&F).The connected modes such as that each sub-axis body can adopt is bonding, riveted joint are connected as a single entity.

In sum, the present embodiment improves by the make to axle, make axle in above-mentioned Acoustic Wave Propagation direction, there is at least one its sound wave plane of incidence and the uneven middle layer of sound wave exit facet, thereby plane sound wave is incided in described middle layer, to improve the sound-insulation capability of sound insulator in the mode that is an angle (being preferably acute angle) with the normal of the sound wave plane of incidence in described middle layer.

Embodiment five:

The present embodiment is that the axle in embodiment bis-and embodiment tetra-is further improved.As shown in Figure 8, sheathed multiple pads 5 on the outside surface of columnar shaft 6, the thickness of each pad is all identical, and interval between adjacent pads is also all identical.

Above-mentioned pad 5 can be circular, square, polygon, serrate or other applicable shapes, and the material of pad 5 can be the materials such as rubber, lead, resin, as long as the acoustic impedance ratio of adjacent media enough greatly.

Because the hot-fluid attenuation coefficient of metallic copper is 445, decay large more than 20 times than the hot-fluid of iron (18.8), so the intensity of considering and price, can use the material of copper as above-mentioned axle, but the material of axle is not limited to copper, it can need to adopt any applicable material according to actual design.

The mode that the present embodiment is used in the sheathed multiple pads of outside surface of axle substitutes in conventional art the mode of overall coating rubber layer on the outside surface of axle, so also can improve sound insulation property.

Embodiment six:

The present embodiment is the further improvement that axle described in embodiment five is done.As shown in Figure 9, also sheathed multiple pad 5 on the outside surface of axle 6, the thickness of each pad is all identical, and interval between adjacent pads is also all identical.Different from embodiment five, the shape that approaches a pad of pinger in the present embodiment most changes to some extent,, has cone-shaped groove 8 in the central area of the sound wave incident end of this pad that is.Incide the pad with described groove 8 in the mode that is an angle (being preferably acute angle) with the normal of the sound wave plane of incidence of pad with described groove 8 by plane sound wave that this cone-shaped groove 8 makes to propagate into acoustic receiver from pinger is set, thereby also can improve the sound-insulation capability of sound insulator.

Equally, above-mentioned pad 5 can be circular, square, polygon, serrate or other applicable shapes, and the material of pad 5 can be the materials such as rubber, lead, resin, as long as its acoustic impedance enough greatly.Can use the material of copper as above-mentioned axle, but the material of axle is not limited to copper, can need to adopts any applicable material according to actual design.

In addition, the shape of above-mentioned groove 8 is not limited to taper shape, can also be other shapes, as long as this shape can make in above-mentioned Acoustic Wave Propagation direction, the pad with this groove does not have the surface being parallel to each other.

Figure 10 shows the front elevation of the axle of sheathed pad, can more understand the technical scheme of above-described embodiment five, six by this figure.In the figure, Reference numeral 5 represents pad, and Reference numeral 6 represents axle, and Reference numeral 7 represents polytetrafluoro pipe, its between each pad 5 for setting-up piece 5.Shown in this figure is preferred version of the present invention, and the present invention does not limit to therewith.For example, the pipe 7 between above-mentioned pad 5 can also adopt plumbous grade for other materials, or can save pipe 7, fixes pad 5 and change by other modes, such as adopting screw riveted joint or the mode such as bonding.

As shown in figure 11, can carry out by simulation result the defening effect of cutting scheme more of the present invention and traditional cutting scheme.As shown in the figure, line B wherein and G represent the defening effect simulation result of the sound insulator making according to traditional cutting scheme, its center line B represents to be carved with its lateral vertical in the defening effect of the sound insulator of the rectangular channel of sound insulator axis on shell and axle, line G represents to be carved with on shell and axle the defening effect between its side and sound insulator axis with the sound insulator of the rectangular channel of acute angle angle, and line R is the defening effect simulation result of the sound insulator that makes according to cutting scheme of the present invention.Can obviously be found out by Figure 11, the sound insulator making according to cutting scheme of the present invention has embodied the acoustic attenuation characteristic that is better than traditional scheme in wide frequency range.

Above understood in detail each embodiment of the present invention, but it is emphasized that sound insulator of the present invention must not comprise shell and axle, it can only have axle, and shell is no longer set in axle outside; And axle can be hollow can be also solid.In addition, because shell and axle are two relatively independent unit, uninevitable contact between its two, therefore in the time that the scheme that adopts shell to add axle builds sound insulator, sound insulator of the present invention can be the combination in any of above-mentioned each shell and each axle, the for example shell described in embodiment mono-adds the axle described in embodiment bis-or four, the shell described in embodiment tri-adds the axle described in embodiment bis-or four, or the axle that shell described in embodiment mono-or three adds described in traditional axle, embodiment bis-or four adds traditional shell etc.

It should be noted that in addition, above described is the sound insulator structure of some types by shell and axle or the sound insulator structure that is made up of separately axle, and sound insulator is not limited in said structure, any physical construction being connected between pinger and acoustic receiver can be called sound insulator, also can improve its sound insulation property by technical solutions according to the invention.

Although described the present invention in detail in conjunction with specific embodiment, it should be understood that previous embodiment is only as example, and be not meant to limit the present invention.Those skilled in the art can easily imagine other distortion and the amendment of these embodiment according to its existing professional knowledge, it can make these distortion and amendment to the present invention without departing from the spirit and scope of the present invention, to obtain some or all advantage of the present invention.

Claims (33)

1. an acoustic detection device, it comprises transmitter, receiver and sound insulator, wherein said sound insulator is between described transmitter and described receiver, described sound insulator at least has shell and axle, it is characterized in that: on described shell, there are multiple grooves, described groove has the sound wave plane of incidence and sound wave exit facet in the Acoustic Wave Propagation direction from described transmitter to described receiver, and the described sound wave plane of incidence and described sound wave exit facet are not parallel to each other; On described axle, also have and in described Acoustic Wave Propagation direction, there are the sound wave plane of incidence that is not parallel to each other and multiple grooves of sound wave exit facet; Groove on described shell and axle be shaped as deforming triangle or trapezoidal.

2. according to the acoustic detection device of claim 1, wherein, in the groove on described shell and/or axle, be filled with mud, silicone oil, rubber, resin or lead.

3. according to the acoustic detection device of claim 1, wherein, on the outside surface of described axle, be arranged with multiple pads.

4. according to the acoustic detection device of claim 3, the central area that wherein approaches most the sound wave incident end of the pad of described transmitter has groove, thereby makes the described pad with described groove not have the surface being parallel to each other in described Acoustic Wave Propagation direction.

5. according to the acoustic detection device of claim 4, wherein said groove is conical.

6. according to the acoustic detection device of one of claim 1-5, wherein said acoustic detection device is the down-hole sniffer in acoustical well-logging devices.

7. according to the acoustic detection device of one of claim 1-5, wherein said sound wave along with described shell and/or axle on the normal of the sound wave plane of incidence of groove be the direction incident of acute angle.

8. an acoustic detection device, it comprises transmitter, receiver and sound insulator, wherein said sound insulator is between described transmitter and described receiver, described sound insulator has axle, it is characterized in that: on described axle, there are multiple grooves, described groove be shaped as deforming triangle or trapezoidal, described groove has the sound wave plane of incidence and sound wave exit facet in the Acoustic Wave Propagation direction from described transmitter to described receiver, the described sound wave plane of incidence and described sound wave exit facet are not parallel to each other.

9. according to the acoustic detection device of claim 8, wherein, described sound insulator also has shell, on described shell, has rectangular channel.

10. according to the acoustic detection device of claim 8 or 9, wherein, on the outside surface of described axle, be arranged with multiple pads.

11. acoustic detection devices according to claim 10, the central area that wherein approaches most the sound wave incident end of the pad of described transmitter has groove, thereby makes the described pad with described groove not have the surface being parallel to each other in described Acoustic Wave Propagation direction.

12. acoustic detection devices according to claim 11, wherein said groove is conical.

13. acoustic detection devices according to claim 8, wherein said acoustic detection device is the down-hole sniffer in acoustical well-logging devices.

14. acoustic detection devices according to claim 8, wherein said sound wave along with described axle on the normal of the sound wave plane of incidence of groove be the direction incident of acute angle.

15. 1 kinds of acoustic detection devices, it comprises transmitter, receiver and sound insulator, wherein said sound insulator is between described transmitter and described receiver, described sound insulator at least has shell and axle, it is characterized in that: described shell is made up of at least three sub-housings on the Acoustic Wave Propagation direction from described transmitter to described receiver, the material difference of adjacent sub-housing, except be positioned at head and the tail position sub-housing other sub-housings in described Acoustic Wave Propagation direction, there is the sound wave plane of incidence and sound wave exit facet, the described sound wave plane of incidence and described sound wave exit facet are not parallel to each other.

16. acoustic detection devices according to claim 15, wherein, described axle is made up of at least three sub-axis bodies in described Acoustic Wave Propagation direction, the material difference of adjacent sub-axis body.

17. acoustic detection devices according to claim 16, wherein, except be positioned at head and the tail position sub-axis body other sub-axis bodies in described Acoustic Wave Propagation direction, there is the sound wave plane of incidence and sound wave exit facet, the described sound wave plane of incidence and described sound wave exit facet are not parallel to each other.

18. acoustic detection devices according to claim 15, wherein, have multiple grooves on described axle, described groove has the sound wave plane of incidence and sound wave exit facet in described Acoustic Wave Propagation direction.

19. acoustic detection devices according to claim 18, wherein, the sound wave plane of incidence and the sound wave exit facet of described groove are not parallel to each other.

20. acoustic detection devices according to one of claim 15-19, are arranged with multiple pads on the outside surface of wherein said axle.

21. acoustic detection devices according to claim 20, the central area that wherein approaches most the sound wave incident end of the pad of described transmitter has groove, thereby makes the described pad with described groove not have the surface being parallel to each other in described Acoustic Wave Propagation direction.

22. acoustic detection devices according to claim 21, wherein said groove is conical.

23. acoustic detection devices according to claim 15, wherein said acoustic detection device is the down-hole sniffer in acoustical well-logging devices.

24. acoustic detection devices according to claim 15, wherein said sound wave is along being the direction incident of acute angle with the normal of the described sound wave plane of incidence.

25. 1 kinds of acoustic detection devices, it comprises transmitter, receiver and sound insulator, and wherein said sound insulator is between described transmitter and described receiver, and described sound insulator has axle,

It is characterized in that: described axle is made up of at least three sub-axis bodies on the Acoustic Wave Propagation direction from described transmitter to described receiver, the material difference of adjacent sub-axis body, except be positioned at head and the tail position sub-axis body other sub-axis bodies in described Acoustic Wave Propagation direction, there is the sound wave plane of incidence and sound wave exit facet, the described sound wave plane of incidence and described sound wave exit facet are not parallel to each other.

26. acoustic detection devices according to claim 25, wherein, described sound insulator also has shell, has multiple grooves on described shell, and described groove has the sound wave plane of incidence and sound wave exit facet in described Acoustic Wave Propagation direction.

27. acoustic detection devices according to claim 26, wherein, the sound wave plane of incidence and the sound wave exit facet of described groove are not parallel to each other.

28. acoustic detection devices according to one of claim 25-27, are arranged with multiple pads on the outside surface of wherein said axle.

29. acoustic detection devices according to claim 28, the central area that wherein approaches most the sound wave incident end of the pad of described transmitter has groove, thereby makes the described pad with described groove not have the surface being parallel to each other in described Acoustic Wave Propagation direction.

30. acoustic detection devices according to claim 29, wherein said groove is conical.

31. acoustic detection devices according to claim 25, wherein said acoustic detection device is the down-hole sniffer in acoustical well-logging devices.

32. acoustic detection devices according to claim 25, wherein said sound wave is along being the direction incident of acute angle with the normal of the described sound wave plane of incidence.

33. according to the acoustic detection device described in claim 25, it is characterized in that, the connected mode between described at least three sub-axis bodies is bonding or riveted joint.