Small-scale sound wave signal receiver

Abstract

The invention discloses a small-scale sound wave signal receiver in the technical field of sound wave detection, which comprises a rigid shell, silicone oil, a mounting framework, a receiving crystal, a flexible buckle and a rubber sleeve, and is characterized in that one end of the rigid shell is connected with an oil filling plug, and the other end of the rigid shell is connected with a cable connector; the silicone oil is filled in an inner cavity of the rigid shell; the mounting framework is arranged in an inner cavity of the rigid shell and a crystal mounting groove is formed in the mounting framework; the receiving crystal is arranged in the crystal mounting groove and is immersed in the silicone oil; the flexible buckle is arranged in the crystal mounting groove, one end of the flexible buckle is clamped with one end of the receiving crystal in the length direction, and the other end of the flexible buckle is clamped with the mounting framework; the rubber sleeve is arranged in an inner cavity of the rigid shell, and the rubber sleeve is arranged on the outer side of the installation framework in a sleeving mode and enables the installation framework and the rigid shell to be fixedly connected in the width direction. The receiver has the advantages of being small in size, simple in structure and easy to mount and dismount, and can be suitable for various environments in the underground formation medium detection process.

Description

Technical Field

[0001] The invention relates to the technical field of sound wave detection, and in particular to a small-scale sound wave signal receiver. Background Art

[0002] Acoustic wave detection technology is a commonly used detection technology and is widely used in geological engineering surveys and oil and gas exploration. It can measure the lithology and structure of underground strata during the detection process, and use various acoustic parameters obtained from on-site measurements to comprehensively evaluate the strata, thereby improving the efficiency of engineering surveys and resource exploration and reducing risks during construction and operations.

[0003] The basic principle of acoustic wave detection is to obtain the velocity and amplitude information of the formation acoustic wave through the different propagation speed and signal attenuation of the acoustic wave in the underground formation medium, thereby reflecting the acoustic characteristics of the surrounding formation medium; wherein, the mutual conversion of electrical signals and acoustic signals is realized by using the acoustic wave transmitter and the receiving transducer. When the acoustic wave detection instrument is actually working (usually in an underground drilling environment), the acoustic wave transmitter on the detection instrument generates an acoustic wave emission signal by applying a high-voltage excitation pulse. After the acoustic wave signal enters the formation medium, it undergoes energy conversion and propagation in the formation. The echo signal is received by the acoustic wave receiver installed on the detection instrument, and then the received data signal is processed to obtain the acoustic wave propagation velocity and amplitude information in the underground formation medium. This type of information contains physical properties and structural characteristics related to the underground medium.

[0004] Generally speaking, acoustic wave transmitting transducers and receiving transducers mainly use passive devices based on piezoelectric ceramic materials. Among them, as a passive working device, the performance of the acoustic wave receiver is closely related to the receiver module structure (environmental resistance), size specifications (application range), installation and placement method (boundary conditions), coupling method (energy conversion efficiency), sealing mechanism (insulation), etc.

[0005] like Figure 8 As shown, the existing sound wave signal receiver includes a mounting frame 3, a receiving crystal 4 and a binding belt 22. The mounting frame 3 is cylindrical, and four crystal mounting grooves 9 are formed on the outer circumferential surface of the mounting frame 3. The receiving crystal 4 is accommodated in the crystal mounting groove 9 and is radially fixedly connected to the mounting frame 3 by the binding belt 22. The patent document with the announcement number CN104614066B discloses a piezoelectric ceramic hydrophone sealed with a metal shell, including a metal shell, a glass plug, a signal pin and a pressure-sensitive element, and the pressure-sensitive element is a circular piezoelectric ceramic sheet. In actual production activities, the above two types of sound wave receivers are limited by the sensitivity of the sound wave signal and the installation form of the receiving crystal. There is a problem that the radial size of the sound wave receiver is large and cannot be applied to small-diameter drilling, which limits the use of the sound wave receiver.

[0006] Therefore, how to reduce the radial size of the sound wave receiver while ensuring the sensitivity of the sound wave receiver has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0007] In view of this, an object of the present invention is to provide a small-scale acoustic wave signal receiver to solve the technical problem of large radial dimensions of existing acoustic wave signal receivers.

[0008] The technical solution adopted by the present invention is: a small-scale sound wave signal receiver, comprising:

[0009] Rigid shell;

[0010] Silicone oil, the silicone oil is filled in the inner cavity of the rigid shell;

[0011] A mounting frame, the mounting frame is arranged in the inner cavity of the rigid shell, and a crystal mounting groove is formed on the mounting frame;

[0012] A receiving crystal, wherein the receiving crystal is disposed in a crystal mounting groove and immersed in silicone oil;

[0013] A flexible clip, wherein the flexible clip is arranged in the crystal mounting groove, one end of the flexible clip is engaged with one end of the receiving crystal in the length direction, and the other end of the flexible clip is engaged with the mounting frame, so that the receiving crystal is fixedly connected to the mounting frame in the length direction and the thickness direction;

[0014] A rubber sleeve, wherein the rubber sleeve is arranged in the inner cavity of the rigid shell, and the rubber sleeve is arranged outside the mounting frame to fix the mounting frame and the rigid shell in the width direction;

[0015] An oil-filled plug, which is detachably fixedly connected to one end of the rigid shell in the length direction;

[0016] A cable connector is detachably fixedly connected to the other end of the rigid shell in the length direction.

[0017] Preferably, the rigid shell includes a flat strip-shaped metal shell, a first connector and a second connector, the first connector is fixedly connected to one end of the flat strip-shaped metal shell in the length direction, the second connector is fixedly connected to the other end of the flat strip-shaped metal shell in the length direction, the first connector is formed with an oil filling hole connected to the inner cavity of the flat strip-shaped metal shell, one end of the oil filling plug is passed through the oil filling hole, and a circular sealing ring is installed between the oil filling plug and the first connector; the second connector is formed with a mounting hole connected to the inner cavity of the flat strip-shaped metal shell, one end of the cable connector is passed through the mounting hole, and a square sealing ring is installed between the cable connector and the second connector.

[0018] Preferably, the number of the circular sealing rings is two, and the number of the square sealing rings is two.

[0019] Preferably, a plurality of crystal mounting grooves are evenly spaced along the length direction on the mounting frame.

[0020] Preferably, a first card slot is formed along the length direction on both sides of the flexible clip in the width direction, a second card slot is formed along the width direction and an oil inlet slot is formed along the thickness direction at one end in the length direction of the flexible clip, and an accommodating card slot is formed along the length direction at the other end in the length direction of the flexible clip, the first card slot and the second card slot are snap-connected to the mounting frame, one end of the receiving crystal is snap-connected in the accommodating card slot, the stepped accommodating card slot is connected to the oil inlet slot, and the groove depth of the oil inlet groove is greater than the groove depth of the second card slot.

[0021] Preferably, the flexible buckle is made of silicone and the mounting frame is made of plastic.

[0022] Preferably, a plurality of connecting holes are spaced apart along the length direction of the rubber sleeve, and the connecting holes penetrate the rubber sleeve along the thickness direction.

[0023] Preferably, the receiving crystal is made of piezoelectric ceramic or lead niobate, and the length of the receiving crystal is less than 25 mm, the width is less than 5 mm, and the thickness is less than 3 mm.

[0024] Beneficial effects of the present invention:

[0025] The present invention adopts the method of metal material packaging and oil-filled coupling. First, the mounting frame and the rigid shell are fixedly connected in the width direction by a rubber sleeve that is sleeved on the outside of the mounting frame and can be elastically deformed. This can not only attenuate the propagation of the direct wave signal in the radial direction, but also change the installation method of the receiving crystal inside the rigid shell, thereby realizing a smaller radial size of the sound wave signal receiver; then, the receiving crystal is clamped in the crystal installation groove of the mounting frame by a flexible buckle, thereby realizing a flexible connection between the receiving crystal and the mounting frame, which can attenuate the propagation of the direct wave information between the mounting frame and the receiving crystal, thereby improving the sensitivity of the sound wave signal receiver, so that the size of the receiving crystal can be reduced, thereby realizing a reduction in the radial size of the sound wave information receiver, and at the same time has the advantages of simple structure and quick disassembly and installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional schematic diagram of a small-scale sound wave signal receiver of the present invention;

[0027] Figure 2 It is an exploded structural diagram of a small-scale acoustic wave signal receiver of the present invention;

[0028] Figure 3 It is a schematic diagram of the structure of a small-scale acoustic wave signal receiver from a first viewing angle of the present invention;

[0029] Figure 4 A second perspective structural diagram of a small-scale acoustic wave signal receiver of the present invention;

[0030] Figure 5 It is a first-person perspective stereoscopic schematic diagram of the flexible buckle;

[0031] Figure 6 It is a second-view stereoscopic schematic diagram of the flexible buckle;

[0032] Figure 7 A three-dimensional schematic diagram of the installation frame;

[0033] Figure 8 It is a structural schematic diagram of an existing sound wave signal receiver.

[0034] Description of reference numerals in the figures:

[0035] 1. Rigid shell; 2. Silicone oil; 3. Mounting frame; 4. Receive crystal; 5. Flexible buckle; 6. Rubber sleeve; 7. Oil-filled plug; 8. Cable connector; 9. Crystal mounting slot; 10. Flat metal shell; 11. First connector; 12. Second connector; 13. Round sealing ring; 14. Square sealing ring; 15. First slot; 16. Second slot; 17. Oil inlet slot; 18. Accommodating slot; 19. Connecting hole; 20. First connecting bolt; 21. Second connecting bolt; 22. Binding tape. DETAILED DESCRIPTION

[0036] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, but not to limit the present invention.

[0037] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] Furthermore, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0040] Examples, such as Figure 1-Figure 7 As shown, a small-scale acoustic wave signal receiver comprises:

[0041] The rigid shell 1 is arranged along the length direction.

[0042] Silicone oil 2 is filled in the inner cavity of the rigid shell 1 .

[0043] The mounting frame 3 is arranged in the inner cavity of the rigid shell 1 along the length direction, and a crystal mounting groove 9 is formed on the mounting frame 3 .

[0044] The receiving crystal 4 is disposed in the crystal mounting groove 9 and immersed in the silicone oil 2 .

[0045] Flexible clips 5, the number ratio of the flexible clips 5 to the receiving crystals 4 is 2:1, and the flexible clips 5 are arranged in the crystal mounting groove 9 and are located at both ends of the length direction of the receiving crystals 4, one end of the flexible clip 5 is clamped with one end of the length direction of the receiving crystal 4, and the other end of the flexible clip 5 is clamped with the mounting frame 3, so that the receiving crystal 4 is fixedly connected to the mounting frame 3 in the length direction and the thickness direction.

[0046] The rubber sleeve 6 is arranged in the inner cavity of the rigid shell 1 along the length direction, and the rubber sleeve 6 is sleeved on the outside of the mounting frame 3 so that the mounting frame 3 and the rigid shell 1 are fixedly connected in the width direction, and there is a gap between the rubber sleeve 6 and the receiving crystal 4 in the thickness direction.

[0047] The oil-filling plug 7 is detachably fixedly connected to one end of the rigid shell 1 in the length direction.

[0048] A cable connector 8 is detachably fixedly connected to the other end of the rigid housing 1 in the length direction.

[0049] The present application adopts the method of metal material packaging and oil-filled coupling. First, the mounting skeleton 3 is fixedly connected to the rigid shell 1 in the width direction by a rubber sleeve 6 that is sleeved on the outside of the mounting skeleton 3 and can be elastically deformed. This can not only attenuate the propagation of the direct wave signal in the radial direction, but also change the installation method of the receiving crystal 4 inside the rigid shell 1, thereby realizing a smaller radial size of the sound wave signal receiver; then, the receiving crystal 4 is clamped in the crystal mounting groove 9 of the mounting skeleton 3 by a flexible buckle 5, thereby realizing a flexible connection between the receiving crystal 4 and the mounting skeleton 3, which can attenuate the propagation of the direct wave information between the mounting skeleton 3 and the receiving crystal 4, thereby improving the sensitivity of the sound wave signal receiver, so that the size of the receiving crystal 4 can be reduced, thereby realizing a reduction in the radial size of the sound wave signal receiver, and at the same time has the advantages of simple structure and quick disassembly and installation.

[0050] It should be noted that the length direction in the present application refers to the X-axis direction in the figure, the width direction refers to the Y-axis direction in the figure, and the thickness direction refers to the Z-axis direction in the figure.

[0051] Examples, such as Figure 1-Figure 7 As shown, a small-scale sound wave signal receiver includes: a rigid shell 1, silicone oil 2, a mounting frame 3, a receiving crystal 4, a flexible buckle 5, a rubber sleeve 6, an oil-filled plug 7 and a cable connector 8.

[0052] The rigid shell 1 is arranged along the length direction, and the rigid shell 1 is made of all-metal material, which can ensure the environmental usage strength of the sound wave signal receiver; the rigid shell 1 includes a flat strip-shaped metal shell 10, a first connector 11 and a second connector 12, and the cross-section of the flat strip-shaped metal shell 10 is formed into a waist-shaped hole, that is, the thickness dimension of the flat strip-shaped metal shell 10 is smaller than the width dimension, and at both ends in the width direction, the outer surface of the flat strip-shaped metal shell 10 is a smooth arc surface; the cross-sectional shape of the first connector 11 and the second connector 12 is a rectangle.

[0053] The first connector 11 is fixedly connected to one end (the left end in the figure) of the flat strip-shaped metal shell 10 in the length direction, and an oil filling hole (not shown in the figure) is formed on the first connector 11. The oil filling hole is connected to the inner cavity of the flat strip-shaped metal shell 10. One end of the oil filling plug 7 is inserted into the oil filling hole. The oil filling plug 7 is fixedly connected to the first connector 11, and a circular sealing ring 13 is installed between the oil filling plug 7 and the first connector 11. The number of the circular sealing ring 13 is two or more.

[0054] The second connector 12 is fixedly connected to the other end (the right end in the figure) of the flat strip-shaped metal shell 10 in the length direction. A mounting hole is formed on the second connector 12, and the mounting hole is connected to the inner cavity of the flat strip-shaped metal shell 10. The cable connector 8 is used for power supply and signal output of the receiver. One end of the cable connector 8 is inserted into the mounting hole. The cable connector 8 is fixedly connected to the second connector 12, and a square sealing ring 14 is installed between the cable connector 8 and the second connector 12. The number of the square sealing rings 14 is two or more.

[0055] Preferably, the fixed connection between the oil-filling plug 7 and the first connecting head 11 is achieved as follows: a plurality of first threaded connecting holes parallel to the oil filling hole are formed on the first connecting head 11, and a plurality of first connecting through holes are formed on the oil-filling plug 7, and the first connecting through holes and the first threaded connecting holes are in a one-to-one correspondence, and a first connecting bolt 20 is installed in the first connecting through hole, and one end of the first connecting bolt 20 is threadedly connected to the first threaded connecting hole, so that the oil-filling plug 7 and the first connecting head 11 at one end of the rigid shell 1 can be detachably fixedly connected.

[0056] The fixed connection between the cable connector 8 and the second connector 12 is achieved as follows: a plurality of second threaded connection holes parallel to the mounting holes are formed on the second connector 12, and a plurality of second connection through holes are formed on the cable connector 8, and the second connection through holes are in a one-to-one correspondence with the second threaded connection holes. A second connection bolt 21 is installed in the second connection through hole, and one end of the second connection bolt 21 is threadedly connected to the second threaded connection hole, so that the cable connector 8 is detachably fixedly connected to the second connector 12 at one end of the rigid shell 1.

[0057] The silicone oil 2 is injected into the inner cavity of the rigid shell 1 through the oil injection hole at one end of the rigid shell 1, and the silicone oil 2 fills the inner cavity of the rigid shell 1, so that the receiving crystal 4 is immersed in the silicone oil 2, thereby increasing the contact area between the receiving crystal 4 and the silicone oil 2.

[0058] The mounting frame 3 is disposed in the inner cavity of the rigid shell 1 along the length direction, and a crystal mounting groove 9 is formed on the mounting frame 3 , and the crystal mounting groove 9 is used to place and receive the crystal 4 .

[0059] When there are multiple crystal mounting grooves 9 on the mounting frame 3, the multiple crystal mounting grooves 9 are evenly spaced along the length direction at intervals of 150 mm or 100 mm.

[0060] Preferably, the mounting frame 3 is made of plastic.

[0061] The receiving crystal 4 is located in the crystal mounting slot 9 and is used to receive sound wave signals.

[0062] Specifically, the receiving crystal 4 is made of piezoelectric ceramic material, lead niobate material or piezoelectric composite material. When the acoustic wave signal receiver is used for high temperature environment detection, it is necessary to select high temperature resistant piezoelectric ceramic material to make the receiving crystal 4, such as high temperature deep well detection of oil and gas.

[0063] The length dimension of the receiving crystal 4 is less than 25 mm, the width dimension is less than 5 mm, and the thickness dimension is less than 3 mm. The length dimension of the receiving crystal 4 used in the existing receiver is greater than 50 mm, the width dimension is greater than 10 mm, and the thickness dimension is greater than 5 mm. The volume of the receiving crystal 4 in the present application is only one-fifth of the volume of the existing receiving crystal 4. This smaller-scale design greatly improves the application range of the receiver and can be used in acoustic detection instruments with small diameters. For example, the size of the existing sound wave receiver can only be used in sound wave instruments with a diameter of not less than 92 mm, while the receiver in the present application can be used in sound wave instruments with a minimum diameter of 43 mm.

[0064] The number ratio of the flexible clips 5 to the receiving crystals 4 is 2:1, and the flexible clips 5 are installed in the crystal installation groove 9 and located at both ends of the receiving crystal 4 in the length direction.

[0065] like Figure 5 and Figure 6 As shown, a first card slot 15 is formed along the length direction on both sides of the width direction of the flexible buckle 5, that is, the slot length direction of the first card slot 15 is consistent with the length direction of the mounting frame 3, and a second card slot 16 is formed along the width direction and an oil inlet groove 17 is formed along the thickness direction at one end of the length direction of the flexible buckle 5, that is, the slot length direction of the second card slot 16 is consistent with the width direction of the mounting frame 3, and the slot length direction of the oil inlet groove 17 is consistent with the thickness direction of the mounting frame 3; an accommodating card slot 18 is formed along the length direction at the other end of the length direction of the flexible buckle 5, and the accommodating card slot 18 is a step-shaped one end larger than the other end, that is, the size of one end of the accommodating card slot 18 is adapted to the receiving crystal 4, and the size of the other end of the accommodating card slot 18 is smaller than the size of the receiving crystal 4, so that a shoulder is formed inside the accommodating card slot 18 to limit the receiving crystal 4 in the length direction.

[0066] The first card slot 15 and the second card slot 16 are fixedly connected with the mounting skeleton 3, that is, the mounting skeletons 3 on both sides of the crystal mounting slot 9 in the width direction are clamped in the first card slot 15, and the mounting skeleton 3 at one end in the length direction of the crystal mounting slot 9 is clamped in the second card slot 16, so that the flexible buckle 5 is fixedly connected with the mounting skeleton 3 in the thickness direction, width direction and length direction; one end of the receiving crystal 4 is clamped in the accommodating card slot 18, and one end (small diameter end) of the accommodating card slot 18 is connected to the oil inlet groove 17, and the groove depth of the oil inlet groove 17 is greater than the groove depth of the second card slot 16, so that the silicone oil 2 can enter the accommodating card slot 18 through the oil inlet groove 17 and contact the end face of the receiving crystal 4.

[0067] A flexible point-shaped connection method is adopted between the receiving crystal 4 and the mounting frame 3, and the receiving crystal 4 is buckled on the mounting frame 3 using a flexible buckle 5 made of silicone material, which can minimize the interference caused by the direct contact between the receiving crystal 4 and the mounting frame 3. The main energy of the sound wave signal received by the receiver is the useful signal of the sound wave signal propagating from the external stratum to the receiving crystal 4 in the receiver, and the useless sound wave signal propagating through the mounting frame 3 connected to the rigid shell 1 to reach the receiving crystal 4 is reduced and suppressed as much as possible, that is, the interference and influence of the direct wave signal are minimized, and the only remaining sound wave interference signal belongs to the part with smaller energy. At the same time, the point-shaped flexible connection and fixing method can also make the receiving crystal 4 be placed as freely as possible in the silicone oil 2 environment. The receiving crystal 4 is filled with silicone oil 2 all around, and silicone oil 2 is an excellent acoustic wave coupling agent, which ensures that the surface pressure of the receiving crystal 4 filled with silicone oil 2 is consistent, and can efficiently receive useful acoustic signals transmitted from the formation. The integrated comprehensive design of this flexible connection, silicone oil coupling and high-performance receiving crystal material can further improve the receiving sensitivity and signal-to-noise ratio of the receiver. Within a certain working bandwidth range (1kHz-20kHz), the receiving sensitivity of the receiver can reach -200dB, while the average sensitivity of existing receivers is -210dB.

[0068] The rubber sleeve 6 is sleeved on the outside of the mounting frame 3, and in the thickness direction, there is a gap between the rubber sleeve 6 and the receiving crystal 4 so that the silicone oil 2 is in full contact with the receiving crystal 4; the rubber sleeve 6 is arranged in the inner cavity of the rigid shell 1 along the length direction, and the outer size and shape of the rubber sleeve 6 are close to the inner size and shape of the flat metal shell 10, ensuring that the rubber sleeve 6 equipped with the mounting frame 3 and the receiving crystal 4 can be embedded in the interior of the flat metal shell 10, and the rubber sleeve 6 is relatively soft and has a certain compressibility so that the mounting frame 3 and the rigid shell 1 are fixedly connected in the width direction.

[0069] Preferably, a plurality of connecting holes 19 are spaced apart along the length direction on the rubber sleeve 6 , and the connecting holes 19 penetrate the rubber sleeve 6 along the thickness direction so that the silicone oil 2 inside and outside the rubber sleeve 6 can flow, and it is also convenient for the signal line to connect the receiving crystal 4 with the cable connector 8 .

[0070] The installation process of the receiver for this application is as follows:

[0071] First, weld the cable (the receiving crystal 4 has positive and negative poles), and connect it to the terminal posts of the cable connector 8. Then, use flexible buckles 5 to flexibly fix the two ends of the receiving crystal 4 to the mounting frame 3. Use rubber sleeves 6 to cover the mounting frame 3 and the receiving crystal 4 fixed on it. Place them inside the rigid shell 1. Install the cable connector 8 at one end of the rigid shell 1 and fix it. Finally, fill the inner cavity of the rigid shell 1 with oil through the other end. After the oil filling is completed, install the oil filling plug 7 and fix the bolts.

[0072] Compared with the prior art, this application has at least the following beneficial technical effects:

[0073] This application adopts a rectangular strip structure encapsulated and connected by all-metal materials, and is coupled by oil filling. It uses a small-scale receiving crystal and a multi-layer acoustic signal coupling design to achieve a high-sensitivity receiver with strong scalability and environmental resistance. When used in acoustic wave detection instruments, it can further improve the signal-to-noise ratio of acoustic wave signals.

[0074] The present application performs a multi-layer packaging of the receiver in the form of a metal shell-rubber sleeve-silicone oil, which ensures the coupling and sealing of the sound wave receiving signal to the greatest extent, and also ensures the insulation treatment of the transducer; the use of metal material packaging, oil filling pressure balance and multiple sealing treatments at the connection points allows the receiver to withstand greater pressure at normal temperature and high temperature environments; the receiver can use a variety of high-temperature resistant material components to ensure that the receiver can be used in high-temperature environments; the receiving crystal adopts a small-scale volume design and a new flexible connection installation method, which can reduce and minimize the impact of the receiver being directly contacted by the installation support and connecting components, making the received sound wave signal purer and ensuring that the receiver has a higher sensitivity; the receiver is scalable. When the length of the installation frame is increased, multiple receiving crystals (4, 8, 12) can be installed on the installation frame to be used as a receiving array. When the number of receiving entities is increased, it can be used for symmetrical, multi-directional sound wave signal reception (4, 8).

[0075] The present application adopts a three-layer material coupling method (from outside to inside) of metal shell-rubber sleeve-silicone oil for the acoustic wave coupling of the receiver. The acoustic impedance of these materials gradually decreases. When the acoustic impedance gradually decreases, the damping of the sound wave during the propagation process gradually decreases, which can better ensure the propagation of the sound wave signal, reduce the scattering and reflection of the sound wave signal caused by the gradual increase of the acoustic impedance, improve the propagation and transmission efficiency of the sound energy, enable the sound wave signal to be transmitted to the receiving crystal more concentratedly, and reduce other interference factors, facilitate the propagation and reception of the sound wave signal, and make the received signal purer and clearer. At the same time, the oil filling method can also be used for pressure balance in high temperature environments, and the protection of the three-layer packaging also makes the receiving crystal less susceptible to damage.

[0076] The receiver in this application has the characteristics of small size, simple structure, and easy implementation. It is suitable for various environments in the process of underground formation medium detection, easy to install, and convenient for market promotion and application.

[0077] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A small-scale acoustic signal receiver, characterized in that: include: A rigid housing (1); Silicone oil (2), the silicone oil (2) being filled in the inner cavity of the rigid shell (1); A mounting frame (3), the mounting frame (3) being arranged in the inner cavity of the rigid shell (1), and a crystal mounting groove (9) being formed on the mounting frame (3); A receiving crystal (4), wherein the receiving crystal (4) is arranged in a crystal mounting groove (9) and immersed in the silicone oil (2); A flexible clip (5), wherein the flexible clip (5) is arranged in the crystal mounting groove (9), one end of the flexible clip (5) is clipped to one end of the receiving crystal (4) in the length direction, and the other end of the flexible clip (5) is clipped to the mounting frame (3), so that the receiving crystal (4) and the mounting frame (3) are fixedly connected in the length direction and the thickness direction; A rubber sleeve (6), wherein the rubber sleeve (6) is arranged in the inner cavity of the rigid shell (1), and the rubber sleeve (6) is sleeved on the outside of the mounting frame (3) so as to fix the mounting frame (3) and the rigid shell (1) in a width direction; An oil-filled plug (7), the oil-filled plug (7) being detachably fixedly connected to one end of the rigid shell (1) in the length direction; A cable connector (8) is detachably fixedly connected to the other end of the rigid shell (1) in the length direction.

2. A small-scale acoustic wave signal receiver according to claim 1, characterized in that: The rigid shell (1) comprises a flat metal shell (10), a first connector (11) and a second connector (12); the first connector (11) is fixedly connected to one end of the flat metal shell (10) in the length direction, and the second connector (12) is fixedly connected to the other end of the flat metal shell (10) in the length direction; the first connector (11) is formed with an oil filling hole connected to the inner cavity of the flat metal shell (10); one end of the oil filling plug (7) is inserted into the oil filling hole, and a circular sealing ring (13) is installed between the oil filling plug (7) and the first connector (11); the second connector (12) is formed with a mounting hole connected to the inner cavity of the flat metal shell (10); one end of the cable connector (8) is inserted into the mounting hole, and a square sealing ring (14) is installed between the cable connector (8) and the second connector (12).

3. A small-scale acoustic wave signal receiver according to claim 2, characterized in that: The number of the circular sealing rings (13) is two, and the number of the square sealing rings (14) is two.

4. A small-scale acoustic wave signal receiver according to claim 1, characterized in that: A plurality of crystal mounting grooves (9) are distributed at equal intervals along the length direction on the mounting frame (3).

5. The small-scale acoustic wave signal receiver according to claim 1, characterized in that: A first card slot (15) is formed along the length direction on both sides of the flexible card buckle (5) in the width direction, a second card slot (16) is formed along the width direction and an oil inlet slot (17) is formed along the thickness direction at one end of the flexible card buckle (5) in the length direction, and a receiving card slot (18) is formed along the length direction at the other end of the flexible card buckle (5), the first card slot (15) and the second card slot (16) are connected to the mounting frame (3) by snapping, one end of the receiving crystal (4) is snapped into the receiving card slot (18), the stepped receiving card slot (18) is connected to the oil inlet slot (17), and the groove depth of the oil inlet slot (17) is greater than the groove depth of the second card slot (16).

6. A small-scale acoustic wave signal receiver according to claim 5, characterized in that: The material of the flexible buckle (5) is silica gel, and the material of the mounting frame (3) is plastic.

7. A small-scale acoustic wave signal receiver according to claim 1, characterized in that: A plurality of communication holes (19) are spaced apart along the length direction on the rubber sleeve (6), and the communication holes (19) penetrate the rubber sleeve (6) along the thickness direction.

8. The small-scale acoustic wave signal receiver according to claim 1, characterized in that: The receiving crystal (4) is made of piezoelectric ceramics or lead niobate, and the length of the receiving crystal (4) is less than 25 mm, the width is less than 5 mm, and the thickness is less than 3 mm.

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