Omnidirectional detector with high energy conversion efficiency

Abstract

The invention discloses an omnidirectional detector with high energy conversion efficiency. The omnidirectional detector comprises a shell, the top of the shell is provided with a top cover assembly, the bottom of the shell is provided with a bottom cover, magnetic steel is fixed between the top cover assembly and the bottom cover, an upper magnetic boot is arranged between the magnetic steel and the top cover assembly, and a lower magnetic boot is arranged between the magnetic steel and the bottom cover. The end, close to the top cover assembly, of the upper magnetic boot is provided with an upper convex ring table, and the end, close to the bottom cover, of the lower magnetic boot is provided with a lower convex ring table. The end face of the upper convex ring table and the end face of the lower convex ring table are provided with magnetic resistance grooves. Through the design of adding the magnetic resistance grooves in the end face of the magnetic shoe and utilizing the magnetic field shortcut principle, as much magnetic flux as possible is guided to the shell through the magnetic shoe, effective working magnetic flux is formed, a leakage magnetic field is reduced, parameter changes within the inclination angle range are reduced, and the distortion degree is reduced.

Description

Technical Field

[0001] This invention relates to the field of seismic detection technology, specifically to an omnidirectional detector with high energy conversion efficiency. Background Technology

[0002] The continuous development and application of non-renewable resources such as oil and natural gas have led to a shortage of oil and gas reserves. Countries around the world are investing more and more in oil and gas exploration, and geophysical exploration operations are shifting from land to the ocean and other water areas. As a result, there is an increasingly urgent need for seismic sensors that are conducive to low-cost operations in marine and water network environments.

[0003] The seabed and other water networks have poor excitation conditions, relatively weak excitation energy, and complex coupling conditions. Traditional land-based vertical geophones cannot meet the requirements. Existing omnidirectional seismic geophones for marine exploration have low sensitivity and electromechanical conversion efficiency of less than 80%, which is far behind the development level of land-based vertical geophones. Improving the sensitivity, electromechanical conversion efficiency, and phase response consistency of omnidirectional geophones for marine and water network exploration is one of the core technologies for obtaining high-precision, high-resolution data for marine and water network exploration.

[0004] Announcement No. CN110068390B discloses a piezoelectric and electromagnetic coupling vibration sensor, which combines the coupling principles of piezoelectric effect and electromagnetic induction for vibration signal detection. This allows the two effects to vibrate at the same frequency. By utilizing the wide bandwidth and low signal distortion of piezoelectric signals, it can compensate for high-frequency signals. By utilizing the high gain of electromagnetic induction for low and medium frequency signals, the sensitivity of vibration detection is improved, frequency differences between signals are avoided, and post-processing of signals is facilitated.

[0005] Publication No. CN115373019B discloses a high-sensitivity, wideband, full-tilt seismic detector. This detector includes a first force feedback module, an insulator, a top cover, a terminal block, an upper spring plate, a mass block, a housing, a sealing ring, an insulating gasket, a lead spring, a wire frame, a magnetic shoe, a compensation ring, a lower spring plate, a bottom cover, a second force feedback module, and a third force feedback module. It provides wideband seismic detector technology based on dynamic force balance feedback and full-tilt wideband seismic detector technology based on tilt sensing.

[0006] Announcement No. CN217443552U discloses a high-stability shear wave seismic detector, comprising a bottom cover, an upper magnetic shoe, a lower magnetic shoe, a magnet, an insulator, a top cover, a temperature compensation ring, a lead spring, and a housing. The bottom cover, upper magnetic shoe, lower magnetic shoe, magnet, and top cover are all mounted on the same central axis. The magnet is located between the upper and lower magnetic shoes. The temperature compensation ring is installed at the outer end of the magnet. Two insulators are connected to terminals via lead springs. The detector also includes an upper coil assembly and a lower coil assembly. The upper coil is wound on an upper coil frame, and the lower coil is wound on a lower coil frame. The groove on the bottom surface of the upper coil frame matches the protrusion on the top surface of the lower coil frame to form a combined coil frame. An upper spring plate is provided between the top cover and the upper magnetic shoe, and a lower spring plate is provided between the bottom cover and the lower magnetic shoe.

[0007] The existing technologies described above, which improve detector sensitivity and distortion, have structures that differ from those in this patent.

[0008] In summary, the technical solutions, technical problems to be solved, and beneficial effects of the above-disclosed technologies are all different from those of the present invention. Regarding the more technical features, technical problems to be solved, and beneficial effects of the present invention, the above-disclosed technical documents do not provide any technical inspiration. Summary of the Invention

[0009] In view of the above-mentioned defects in the existing technology, the purpose of this invention is to provide an omnidirectional detector with high energy conversion efficiency.

[0010] To achieve the above objectives, the present invention adopts the following technical solution:

[0011] A high-energy-conversion-efficiency omnidirectional detector includes a housing, a top cover assembly at the top of the housing, a bottom cover at the bottom of the housing, a magnet fixed between the top cover assembly and the bottom cover, an upper magnetic shoe between the magnet and the top cover assembly, and a lower magnetic shoe between the magnet and the bottom cover. The upper magnetic shoe has an upper convex ring at one end near the top cover assembly, and the lower magnetic shoe has a lower convex ring at one end near the bottom cover. Magnetoresistive grooves are provided on the end faces of the upper and lower convex rings.

[0012] Furthermore, the magnetoresistive groove is an annular U-groove;

[0013] Specifically, the top cover assembly is provided with an upper convex frustum, and the upper convex ring is engaged with the upper convex frustum;

[0014] Specifically, the bottom cover is provided with a lower convex truncated cone, and the lower convex ring is engaged with the lower convex truncated cone.

[0015] Furthermore, the magnet, the upper magnetic shoe, and the lower magnetic shoe constitute a magnet, and the magnet is a permanent magnet;

[0016] Specifically, sealing rings are provided between the outer shell and the bottom cover, and between the outer shell and the top cover assembly, to form a sealed cavity;

[0017] Specifically, the outer shell and the magnet are cylindrical, and the axis of the outer shell coincides with the axis of the magnet;

[0018] Specifically, the upper magnetic shoe and the lower magnetic shoe are respectively fastened to the magnet.

[0019] Furthermore, it also includes an inertial system, which comprises an upper spring plate, a lower spring plate, and a coil assembly;

[0020] Specifically, the inner hole of the upper spring plate is fixed between the top cover assembly and the upper magnetic shoe, and the inner hole of the lower spring plate is fixed between the bottom cover and the lower magnetic shoe;

[0021] Specifically, the coil assembly includes an upper coil assembly and a lower coil assembly;

[0022] Specifically, the upper coil assembly is sleeved between the outer wall of the upper magnetic shoe and the iron shell, the lower coil assembly is sleeved between the lower magnetic shoe and the iron shell, the upper coil assembly and the lower coil assembly are fixedly connected, the outer edge of the upper spring plate is connected to the upper coil assembly, and the outer edge of the lower spring plate is connected to the lower coil assembly.

[0023] Furthermore, the upper coil assembly includes an upper wire frame and an upper coil winding, the upper coil winding being wound in the upper wire frame, and the outer edge of the upper spring sheet being snapped into the upper wire frame via a snap ring;

[0024] Specifically, the lower coil assembly includes a lower wire frame and a lower coil winding, the lower coil winding being wound in the lower wire frame, and the outer edge of the lower spring sheet being connected to the lower wire frame via a retaining ring;

[0025] Specifically, an overlapping area is provided between the upper and lower wire racks, and they are fixedly connected in the overlapping area.

[0026] Furthermore, the top cover assembly is provided with terminals, which include positive and negative terminals. The positive terminal, the upper coil winding, and the lower coil winding are connected in sequence by wires.

[0027] Furthermore, the magnet length: magnet outer diameter = 0.6-1;

[0028] Specifically, the gap between the magnetic shoe and the outer shell is: magnet thickness = 8-10;

[0029] Specifically, the outer shell thickness is: the gap between the magnetic shoe and the outer shell = 0.5-1;

[0030] Specifically, the thickness of the magnetic shoe's conductive surface is 2: the magnet thickness is 0.7-0.9.

[0031] Preferably, the magnet length: magnet outer diameter = 0.75;

[0032] Preferably, the gap between the magnetic shoe and the outer shell is: magnet thickness = 8.55;

[0033] Preferably, the outer shell thickness is such that the gap between the magnetic shoe and the outer shell is 0.65.

[0034] Preferably, the thickness of the magnetic shoe's magnetic conductive surface is 2: the magnet thickness is 0.83.

[0035] Furthermore, in the omnidirectional tilt state, the gap between the wire frame and the housing, and the gap between the wire frame and the magnetic shoe are ≥0.1mm;

[0036] Specifically, the distance between the coil winding and the top of the magnetic shoe + the distance between the coil winding and the bottom of the magnetic shoe > 1.2 times the displacement of the coil assembly.

[0037] Preferably, the gap between the wire frame and the housing, and the gap between the wire frame and the magnetic shoe are 0.3 mm;

[0038] Preferably, the width of the end face of the convex ring platform minus the width of the annular U-groove is 1.5-2mm.

[0039] Compared with the prior art, the present invention has the following advantages:

[0040] 1. This invention improves electromechanical conversion efficiency by prioritizing high-energy-product magnets, increasing their height and diameter, reducing the distance between the magnetic shoe and the outer shell, decreasing gap magnetic resistance, and widening the magnetic flux of the gap magnetic field cut by the coil winding. Secondly, increasing the magnet height widens the axial distribution of the winding slots on the coil frame, reducing the coil winding thickness. This allows for the use of larger cross-sectional diameter enameled wire, reducing resistance, and ensures the number of coil turns is not reduced, minimizing energy loss due to coil winding resistance and further improving conversion efficiency. Thirdly, by adding magnetic resistance slots to the end face of the magnetic shoe, the principle of magnetic field shortcuts is utilized to guide as much magnetic flux as possible through the magnetic shoe to the outer shell, forming effective working magnetic flux, reducing leakage magnetic field, and simultaneously reducing parameter variations within the tilt angle range, thus lowering distortion.

[0041] 2. Through optimized design, this invention achieves an output sensitivity of 105V / m / s, which is 31% higher than similar products. The reduced internal resistance further reduces internal losses by 5%, and the overall electromechanical conversion efficiency is increased by 36%, thus improving the response capability to weak signals.

[0042] 3. Through optimized design, the leakage magnetic field ratio of this invention is relatively controlled, and the gap magnetic field is concentrated. The omnidirectional detector output by this invention has a static cumulative frequency variation rate of less than 7.5% in the tilt angle range of 0°-360°, which is 14% better than the product parameter; a static cumulative damping variation rate of less than 12%, which is slightly better than the product parameter of 15%; and a static sensitivity variation of less than 4%, which is better than the original product parameter of 10%. The output parameters of this invention are more consistent, resulting in more consistent amplitude and phase frequency response characteristics, which provides a guarantee for high-fidelity electromechanical conversion of seismic signals and improves the quality of seismic data.

[0043] 4. This invention reduces magnetic field leakage, with the maximum static distortion not exceeding 0.25% within the tilt angle range of 0°-360°, which is better than the product life parameter of 0.35%. Compared with similar products, the distortion is reduced by more than 50%, thus improving the dynamic range of seismic signal response. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the structure of an omnidirectional detector with high energy conversion efficiency according to the present invention;

[0045] Figure 2 This is a schematic diagram of the parameters of the magnet, magnetic shoe, and iron shell in this invention;

[0046] Figure 3 This is a schematic diagram of the annular U-groove structure in this invention;

[0047] Figure 4 This is a schematic diagram of the parameters of the coil assembly in this invention.

[0048] In the diagram: 1. Iron outer shell; 2. Upper wire frame; 3. Lower wire frame; 4. Magnet; 5. Magnetic shoe; 51. Upper magnetic shoe; 52. Lower magnetic shoe; 6. Snap ring; 7. Bottom cover sealing ring; 8. Bottom cover; 9. Lower spring plate; 10. Upper coil winding; 11. Lower coil winding; 12. Upper spring plate; 13. Top cover assembly.

[0049] D0, outer diameter of the magnet; D1, gap between the magnetic shoe and the outer shell; D3, width of the annular U-groove; D4, width of the end face of the convex ring; D5, gap between the wire frame and the iron outer shell; D6, gap between the wire frame and the magnetic shoe; H0, length of the magnet; H1, thickness of the magnet; H2, thickness of the magnetic conductive surface of the pole shoe. Detailed Implementation

[0050] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] Example 1:

[0052] Please see Figures 1 to 4 This invention provides an omnidirectional detector with high energy conversion efficiency, comprising an iron shell 1, a top cover assembly 13 disposed on the top of the iron shell 1, and a bottom cover 8 disposed on the bottom of the iron shell 1. The iron shell 1, the top cover assembly 13, and the bottom cover 8 constitute a sealed cavity. A magnet 4 is fixed between the top cover assembly 13 and the bottom cover 8. An upper magnetic shoe 51 is disposed between the magnet 4 and the top cover assembly 13, and a lower magnetic shoe 51 is disposed between the magnet 4 and the bottom cover 8. The magnet 4, the magnetic shoe 5, and the iron shell 1 constitute a magnetic circuit system. The magnet 4 and the magnetic shoe 5 constitute a magnet. The magnetic energy of the magnet 4 is guided by the upper magnetic shoe 51 and the lower magnetic shoe 52 to the iron shell to form a magnetic circuit, and a gap magnetic field is formed between the magnetic shoe 5 and the iron shell 1.

[0053] Specifically, the top cover assembly 13, the bottom cover 8, and the iron outer shell 1 are connected by press riveting.

[0054] Specifically, sealing rings 7 are provided between the iron outer shell 1 and the bottom cover 8, and between the iron outer shell 1 and the top cover assembly 13, to form a sealed cavity.

[0055] Specifically, the magnet 4, the upper magnetic shoe 51, and the lower magnetic shoe 52 are the main components of the magnetic circuit. The magnet is a permanent magnet, and the upper magnetic shoe 51 and the lower magnetic shoe 52 are respectively fastened to the two poles of the magnet 4.

[0056] Specifically, the upper magnetic shoe 51 is connected to the top cover assembly 13 by a convex ring platform and a convex round platform, and the lower magnetic shoe 52 is connected to the bottom cover 8 by a convex ring platform and a convex round platform.

[0057] Specifically, the iron outer shell 1 and the magnet 4 are cylindrical, and the axis of the iron outer shell 1 coincides with the axis of the magnet 4.

[0058] A high-energy-conversion-efficiency omnidirectional detector also includes an inertial system suspended in the middle of a magnetic circuit system. The inertial system includes an upper spring plate 12, a lower spring plate 9, an upper coil assembly, and a lower coil assembly. The upper coil assembly is sleeved between the outer wall of the upper magnetic shoe 51 and the iron shell 1, and the lower coil assembly is sleeved between the lower magnetic shoe 52 and the iron shell 1. The upper and lower coil assemblies are fixedly connected. The inner hole of the upper spring plate 12 is fixed between the top cover assembly 13 and the upper magnetic shoe 51, and the inner hole of the lower spring plate 9 is fixed between the bottom cover 8 and the lower magnetic shoe 52. The outer edge of the upper spring plate 12 is connected to the upper coil assembly, and the outer edge of the lower spring plate 9 is connected to the lower coil assembly. The upper and lower coil assemblies are placed in the magnetic circuit formed by the iron shell 1 and the magnetic shoe 5. The supporting force of the upper spring plate 12 and the lower spring plate 9 supports the upper and lower coil assemblies, causing them to suspend in the gap magnetic field of the magnetic circuit, forming a simple harmonic vibration system.

[0059] Specifically, the upper coil assembly includes an upper wire frame 2 and an upper coil winding 10, the upper coil winding 10 being wound in the upper wire frame 2, and the outer edge of the upper spring plate 12 being snapped to the upper wire frame 2 via a retaining ring 6; the lower coil assembly includes a lower wire frame 3 and a lower coil winding 11, the lower coil winding 11 being wound in the lower wire frame 3, and the outer edge of the lower spring plate being connected to the lower wire frame 3 via a retaining ring 6; an overlap area is provided between the upper wire frame 2 and the lower wire frame 3, and they are spot-welded together in the overlap area.

[0060] Specifically, the top cover assembly 13 is provided with terminals, which include positive and negative terminals. The positive terminal, the upper coil winding 10, and the lower coil winding 11 are connected in sequence by wires. It should be noted that the setting of terminals and the layout of wires are common knowledge of detectors and are clear to those in the art, so they will not be described in detail here.

[0061] To further utilize the magnetic energy of the magnet and reduce leakage magnetic field, such as Figure 3 As shown, in this embodiment, the upper magnetic shoe 51 is provided with an upper convex annular platform, the top cover assembly 13 is provided with an upper convex circular platform, the upper convex annular platform and the upper convex circular platform are engaged, the lower magnetic shoe 52 is provided with a lower convex annular platform, the bottom cover 8 is provided with a lower convex circular platform, the lower convex annular platform and the lower convex circular platform are engaged.

[0062] Specifically, the end faces of the upper and lower convex ring platforms are provided with annular U-grooves. The annular U-grooves reduce the magnetic cross-sectional area of ​​the positioning step of the magnetic shoe 5 and increase the magnetic resistance. While ensuring the support strength of the upper and lower spring plates 12, more magnetic flux is guided to be distributed along the gap D1 between the magnetic shoe and the outer shell, thereby increasing the effective magnetic flux and reducing the leakage magnetic flux.

[0063] How to use:

[0064] When using the detector, it is fixed to the vibrating object under test by the protective housing. When the object under test vibrates, the magnetic circuit of the detector vibrates synchronously with the object under test. The upper coil assembly and the lower coil assembly are in an inertial relative stationary state under the support of the upper elastic plate 12 and the lower elastic plate 9. The upper coil winding 10 and the lower coil winding 11 move relative to the magnetic field, causing the coil to cut the magnetic lines of force. The coil conductor induces and outputs an electrical signal. This electrical signal is led out to the recording device through the terminal of the top cover assembly 13. The vibration signal is converted into an electrical signal and recorded, completing the electromechanical conversion. The efficiency of the electromechanical conversion is proportional to the gap magnetic field strength and the length of the coil conductor.

[0065] Example 2:

[0066] Based on Example 1, in order to obtain high electromechanical conversion efficiency, as shown in Example 2, the gap magnetic field is made to have high magnetic flux density and high saturation coefficient characteristics.

[0067] High-energy magnet 4 is used to achieve a higher energy efficiency ratio in the magnetic circuit;

[0068] Magnet length H0: Magnet outer diameter D0 = 0.6-1;

[0069] The ratio of the gap between the magnetic shoe and the outer shell, D1, to the magnet thickness, H1, is D1:H1 = 8-10;

[0070] High magnetic permeability material is selected as the iron shell 1, and the thickness of the iron shell D2 is preferably: the gap between the magnetic shoe and the shell D1 = 0.5-1;

[0071] 2*Magnetic shoe magnetic surface thickness H2: Magnet thickness H1 = 0.7-0.9.

[0072] This embodiment is preferred:

[0073] Magnet length H0: Magnet outer diameter D0 = 0.75;

[0074] The ratio of the gap between the magnetic shoe and the outer shell, D1, to the magnet thickness, H1, is D1:H1 = 8.55;

[0075] High magnetic permeability material is selected as the iron shell 1, and the thickness of the iron shell D2 is preferably: the gap between the magnetic shoe and the shell D1 = 0.65;

[0076] 2*Magnetic shoe magnetic surface thickness H2: Magnet thickness H1=0.83.

[0077] Example 3:

[0078] Based on Example 2, to improve the parameter consistency of the omnidirectional seismic detector with high electromechanical conversion efficiency of the present invention, as shown in the appendix... Figure 4 As shown, under the omnidirectional tilt angle, the gap D5 between the wire frame and the iron shell and the gap D6 between the wire frame and the magnetic shoe are both not less than 0.1mm.

[0079] The width of the end face of the convex ring platform, D4, and the width of the annular U-groove, D3, are 1.5-2 mm.

[0080] In this embodiment, the gap D5 between the wire frame and the iron outer casing is equal to the gap D6 between the wire frame and the magnetic shoe, which is 0.3 mm.

[0081] The distance H3 between the coil winding and the top of the magnetic shoe + the distance H4 between the coil winding and the bottom of the magnetic shoe are greater than 1.2 times the displacement Tp-p of the coil assembly. This ensures that the coil assembly can cut a uniform magnetic field equally at any angle in the full tilt state, thereby achieving small parameter changes and small distortion changes at any tilt angle.

[0082] Comparative example:

[0083] The beneficial effects of this invention are as follows: Through the design of Example 2, the design of a high magnetic density gap magnetic field was completed, resulting in an omnidirectional detector with high electromechanical conversion efficiency. The output sensitivity reaches 105V / m / s, which is 31% higher than that of similar products. The internal resistance is reduced, further reducing internal losses by 5%, and the total electromechanical conversion efficiency is increased by 36%. The output results can be used for marine and similar water network seismic exploration, significantly improving the response energy of full-channel seismic signals, enhancing the response capability of weak signals, and improving the signal-to-noise ratio of seismic signals. This provides a better source guarantee for the development of seismic exploration technology in marine and water network areas.

[0084] Through the design of Example 3, the output of an omnidirectional detector with high electromechanical conversion efficiency is ensured to have better parameter consistency in the 0°-360° range, resulting in more consistent amplitude and phase frequency response characteristics. This provides a guarantee for high-fidelity electromechanical conversion of seismic signals and reduces data distortion caused by the superposition of phase distortion in single-shot data. The reduction in leakage magnetic field also results in a maximum static distortion of no more than 0.25% in the 0°-360° tilt range, which is superior to any other product in the industry and more than half the distortion of similar products. This reduces interference signals in the effective frequency band generated during electromechanical conversion and improves the dynamic range of seismic signal response.

[0085] A comparison table of the technical specifications of this invention's high-efficiency omnidirectional detector and high-precision detector with similar products:

[0086]

[0087]

[0088] Test conditions: 22℃, distortion excitation signal: excitation frequency 14Hz, excitation speed 0.7in / s.

[0089] All components not discussed in detail in this application, as well as the connection methods of these components, are well-known technologies in this field. They can be directly applied and will not be elaborated further.

[0090] In this invention, the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0091] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0092] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0093] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A high energy conversion efficiency omnidirectional detector, comprising a housing, a top cover assembly disposed on the top of the housing, a bottom cover disposed on the bottom of the housing, a magnet fixed between the top cover assembly and the bottom cover, an upper magnetic shoe disposed between the magnet and the top cover assembly, and a lower magnetic shoe disposed between the magnet and the bottom cover; Its features are, The upper magnetic shoe is provided with an upper convex ring platform at one end near the top cover assembly, and the lower magnetic shoe is provided with a lower convex ring platform at one end near the bottom cover. Magnetic resistance grooves are provided on the end faces of the upper and lower convex rings.

2. The omnidirectional detector with high energy conversion efficiency according to claim 1, characterized in that, The magnetoresistive groove is an annular U-groove; The top cover assembly is provided with an upper convex truncated cone, and the upper convex annular platform is engaged with the upper convex truncated cone. The bottom cover is provided with a lower convex truncated cone, and the lower convex annular truncated cone is engaged with the lower convex truncated cone.

3. The omnidirectional detector with high energy conversion efficiency according to claim 1, characterized in that, The magnet, the upper magnetic shoe, and the lower magnetic shoe constitute a magnet, and the magnet is a permanent magnet. A sealing ring is provided between the outer shell and the bottom cover, and between the outer shell and the top cover assembly, to form a sealed cavity; The outer shell and the magnet are cylindrical, and the axis of the outer shell coincides with the axis of the magnet. The upper and lower magnetic shoes are respectively fastened to the magnets.

4. The omnidirectional detector with high energy conversion efficiency according to claim 3, characterized in that, It also includes an inertial system, which comprises an upper spring plate, a lower spring plate, and a coil assembly; The inner hole of the upper spring plate is fixed between the top cover assembly and the upper magnetic shoe, and the inner hole of the lower spring plate is fixed between the bottom cover and the lower magnetic shoe. The coil assembly includes an upper coil assembly and a lower coil assembly; The upper coil assembly is sleeved between the outer wall of the upper magnetic shoe and the iron shell, and the lower coil assembly is sleeved between the lower magnetic shoe and the iron shell. The upper coil assembly and the lower coil assembly are fixedly connected. The outer edge of the upper spring plate is connected to the upper coil assembly, and the outer edge of the lower spring plate is connected to the lower coil assembly.

5. A high-energy-conversion-efficiency omnidirectional detector according to claim 4, characterized in that, The upper coil assembly includes an upper wire frame and an upper coil winding. The upper coil winding is wound in the upper wire frame, and the outer edge of the upper spring sheet is snapped to the upper wire frame by a snap ring. The lower coil assembly includes a lower wire frame and a lower coil winding. The lower coil winding is wound in the lower wire frame, and the outer edge of the lower spring sheet is connected to the lower wire frame by a retaining ring. An overlapping area is provided between the upper and lower wire racks, and they are fixedly connected in the overlapping area.

6. A high-energy-conversion-efficiency omnidirectional detector according to any one of claims 1-5, characterized in that, The top cover assembly is provided with terminals, which include positive and negative terminals. The positive terminal, the upper coil winding, and the lower coil winding are connected in sequence by wires.

7. A high-energy-conversion-efficiency omnidirectional detector according to claim 3, characterized in that, Magnet length: Magnet outer diameter = 0.6-1; The gap between the magnetic shoe and the outer shell is calculated as follows: magnet thickness = 8-10. Shell thickness: gap between magnetic shoe and shell = 0.5-1; Magnetic shoe magnetic surface thickness * 2: magnet thickness = 0.7-0.

9.

8. A high-energy-conversion-efficiency omnidirectional detector according to claim 7, characterized in that, Magnet length: magnet outer diameter = 0.75; Clearance between magnetic shoe and outer shell: magnet thickness = 8.55; Shell thickness: gap between magnetic shoe and shell = 0.65; Magnetic shoe magnetic surface thickness * 2: magnet thickness = 0.

83.

9. A high-energy-conversion-efficiency omnidirectional detector according to claim 5, characterized in that, Under omnidirectional tilt, the gap between the wire frame and the housing, and the gap between the wire frame and the magnetic shoe are ≥0.1mm; The distance between the coil winding and the top of the magnetic shoe + the distance between the coil winding and the bottom of the magnetic shoe > 1.2 times the displacement of the coil assembly.

10. A high-energy-conversion-efficiency omnidirectional detector according to claim 9, characterized in that, The gap between the wire frame and the outer casing, and the gap between the wire frame and the magnetic shoe are both 0.3 mm. Width of the convex ring end face - width of the annular U-groove = 1.5-2mm.

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