CN-121995439-A - Omnidirectional detector with high energy conversion efficiency

CN121995439ACN 121995439 ACN121995439 ACN 121995439ACN-121995439-A

Abstract

The invention discloses an omnidirectional detector with high energy conversion efficiency, which comprises a shell, wherein a top cover assembly is arranged at the top of the shell, a bottom cover is arranged at the bottom of the shell, magnetic steel is fixed between the top cover assembly and the bottom cover, an upper magnetic shoe is arranged between the magnetic steel and the top cover assembly, a lower magnetic shoe is arranged between the magnetic steel and the bottom cover, an upper convex ring table is arranged at one end of the upper magnetic shoe close to the top cover assembly, a lower convex ring table is arranged at one end of the lower magnetic shoe close to the bottom cover, and a magnetic resistance groove is arranged at the end face of the upper convex ring table and the end face of the lower convex ring table. According to the invention, through the design of adding the reluctance grooves on the end surfaces of the magnetic shoes, by utilizing the principle of magnetic field shortcuts, as much magnetic flux as possible is led to the shell through the magnetic shoes, so that effective working magnetic flux is formed, the leakage magnetic field is reduced, the parameter variation in the inclination angle range is reduced, and the distortion degree is reduced.

Inventors

WU XUEBING
LI GUANGHUI
ZHU YULEI
SONG MENGXIN
LIANG YONGQI
He Jirui

Assignees

中石化石油工程技术服务股份有限公司
中石化石油工程地球物理有限公司
中石化石油工程地球物理有限公司物资装备中心

Dates

Publication Date: 20260508
Application Date: 20241108

Claims (10)

1. The omnidirectional detector with high energy conversion efficiency comprises a shell, wherein a top cover assembly is arranged at the top of the shell, a bottom cover is arranged at the bottom of the shell, magnetic steel is fixed between the top cover assembly and the bottom cover, an upper magnetic shoe is arranged between the magnetic steel and the top cover assembly, and a lower magnetic shoe is arranged between the magnetic steel and the bottom cover; the magnetic shoe is characterized in that an upper convex ring table is arranged at one end, close to the top cover assembly, of the upper magnetic shoe, and a lower convex ring table is arranged at one end, close to the bottom cover, of the lower magnetic shoe; And the end surfaces of the upper convex ring table and the lower convex ring table are provided with reluctance grooves.
2. The omni-directional detector of claim 1 wherein the magnetoresistive slot is a circular U-slot; the top cover assembly is provided with an upper convex circular table, and the upper convex circular table is clamped with the upper convex circular table; the bottom cover is provided with a lower convex circular table, and the lower convex circular table is clamped with the lower convex circular table.
3. The omni-directional detector with high energy conversion efficiency according to claim 1, wherein the magnetic steel, the upper magnetic shoe and the lower magnetic shoe form a magnet, and the magnetic steel is a permanent magnet; sealing rings are arranged between the shell and the bottom cover and between the shell and the top cover assembly to form a sealing cavity; the shell and the magnetic steel are cylindrical, and the axis of the shell is coincident with the axis of the magnetic steel; the upper magnetic shoe and the lower magnetic shoe are respectively buckled with the magnetic steel.
4. The omni-directional detector of claim 3 further comprising an inertial system comprising an upper leaf spring, a lower leaf spring, a coil assembly; the inner hole of the upper spring piece is fixed between the top cover assembly and the upper magnetic shoe, and the inner hole of the lower spring piece is fixed between the bottom cover and the lower magnetic shoe; the coil assembly comprises 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, the lower coil assembly is sleeved between the lower magnetic shoe and the iron shell, the upper coil assembly is fixedly connected with the lower coil assembly, the outer edge of the upper spring piece is connected with the upper coil assembly, and the outer edge of the lower spring piece is connected with the lower coil assembly.
5. The omnidirectional detector with high energy conversion efficiency of claim 4, wherein the upper coil assembly comprises 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 piece is connected with the upper wire frame in a clamping way through a clamping spring; The lower coil assembly comprises a lower coil frame and a lower coil winding, the lower coil winding is wound in the lower coil frame, and the outer edge of the lower spring piece is connected with the lower coil frame through a clamp spring; An overlapping area is arranged between the upper wire frame and the lower wire frame, and the upper wire frame and the lower wire frame are fixedly connected in the overlapping area.
6. The omni-directional detector of high energy conversion efficiency according to any of claims 1-5, wherein the cap assembly is provided with a binding post comprising a positive electrode and a negative electrode, and the positive electrode, the upper coil winding, and the lower coil winding are sequentially connected by a wire.
7. The omni-directional detector with high energy conversion efficiency according to claim 3, wherein the length of the magnetic steel is equal to the magnetic steel outer diameter=0.6-1; magnetic shoe and shell gap, magnet thickness=8-10; the thickness of the shell is that the clearance between the magnetic shoe and the shell is=0.5-1; Magnetic shoe magnetic conduction surface thickness 2: magnet thickness = 0.7-0.9.
8. The omni-directional detector with high energy conversion efficiency of claim 7 wherein the length of the magnetic steel is magnetic steel outer diameter = 0.75; magnetic shoe and housing gap: magnet thickness = 8.55; shell thickness, magnetic shoe-shell gap = 0.65; magnetic shoe magnetic conduction surface thickness 2: magnet thickness=0.83.
9. The omnidirectional detector with high energy conversion efficiency of claim 5, wherein in the omnidirectional tilt angle state, the gap between the wire frame and the housing and the gap between the wire frame and the magnetic shoe is not less than 0.1mm; The distance between the coil winding and the top end of the magnetic shoe and the distance between the coil winding and the bottom end of the magnetic shoe are greater than 1.2 times of the displacement of the coil assembly.
10. The omni-directional detector of high energy conversion efficiency of claim 9 wherein bobbin-to-housing gap, bobbin-to-magnetic shoe gap = 0.3mm; The width of the end face of the convex ring table-the width of the annular U groove=1.5-2 mm.

Description

Omnidirectional detector with high energy conversion efficiency Technical Field The invention relates to the technical field of seismic detection, in particular to an omnidirectional detector with high energy conversion efficiency. Background The continuous development and application of non-renewable resources of petroleum and natural gas lead to the shortage of reserve oil and gas reservoirs, the worldwide effort of oil and gas exploration investment is increasing, the geophysical exploration operation area is changed from land to sea and other water areas, and the demand for the seismic sensor which is beneficial to low-cost operation in the marine and water network environment is urgent. The ocean bottom and other water networks have poor excitation conditions, relatively weak excitation energy and complex coupling conditions, the traditional land vertical detectors cannot meet the use requirements, the sensitivity of the traditional ocean exploration omnidirectional geophone is low, the electromechanical conversion efficiency is lower than 80%, the development level of the traditional land vertical detectors is greatly different from that of the traditional land vertical detectors, and the improvement of the sensitivity, the electromechanical conversion efficiency and the phase response consistency of the ocean and water network exploration omnidirectional geophone is one of core technologies for acquiring high-precision and resolution data of ocean and water network exploration. The publication number CN110068390B discloses a piezoelectric and electromagnetic coupling vibration sensor, combines the two coupling principles of piezoelectric effect and electromagnetic induction to detect vibration signals, leads the two effects to vibrate at the same frequency, utilizes the characteristics of wide frequency band of the piezoelectric signals and small signal distortion to compensate high-frequency signals, utilizes electromagnetic induction to have high gain on low intermediate frequency signals, improves the sensitivity of vibration detection, avoids frequency difference between the signals and is convenient for post-processing of the signals. The publication number CN115373019B discloses a high-sensitivity broadband full-dip geophone, which comprises a first force feedback module, an insulator, a top cover, a binding post, an upper spring piece, a mass block, a shell, a sealing ring, an insulating gasket, a lead spring, a wire frame, a magnetic shoe, a compensation ring, a lower spring piece, a bottom cover, a second force feedback module and a third force feedback module. A broadband geophone technology based on dynamic force balance feedback and a full dip broadband geophone technology based on dip perception are provided. The utility model discloses a transverse wave geophone of high stability, CN217443552U discloses a transverse wave geophone of high stability, including the bottom, go up the magnetic shoe, lower magnetic shoe, magnet steel, the insulator, the top cap, temperature compensating ring, lead spring and shell, wherein bottom, go up the magnetic shoe, lower magnetic shoe, magnet steel and top cap are all installed on same center pin, the magnet steel is located between upper magnetic shoe and the lower magnetic shoe, temperature compensating ring installs the outer end at the magnet steel, two insulators pass through lead spring to be connected on the terminal, still include coil assembly and lower coil assembly, upper coil winding is on last coil frame down, the bottom surface recess of going up the coil frame and the protruding combination formula coil frame that forms of top surface of lower coil frame match, be provided with the spring leaf between top cap and the upper magnetic shoe, be provided with down the spring leaf between bottom and the lower magnetic shoe. The above-mentioned prior art is different from this patent in the structure that is used for improving detector sensitivity, distortion degree. In summary, the technical scheme of the above disclosed technology, the technical problems to be solved and the beneficial effects are different from those of the present invention, and the above disclosed technical documents have no technical teaching for more technical features of the present invention, the technical problems to be solved and the beneficial effects. Disclosure of Invention In view of the foregoing drawbacks of the prior art, an object of the present invention is to provide an omni-directional detector with high energy conversion efficiency. In order to achieve the above purpose, the present invention adopts the following technical scheme: The omnidirectional detector with the high energy conversion efficiency comprises a shell, wherein a top cover assembly is arranged at the top of the shell, a bottom cover is arranged at the bottom of the shell, magnetic steel is fixed between the top cover assembly and the bottom cover, an upper magnetic shoe is arranged betwee