85 results about "Elliptical cylinder" patented technology

In an embodiment, an antenna for a medical device, e.g., an implantable medical device (IMD), comprises an electrically conductive wire that spirals to form a three-dimensional shape of a rectangular cuboid. In another embodiment, the antenna comprises an electrically conductive wire that spirals to form a three-dimensional shape of an elliptical cylinder, an oval cylinder, an elongated pentagonal prism, an elongated hexagonal prism, or some other shape where the longitudinal diameter of the antenna is greater than the lateral diameter of the antenna. The antennas are sized to fit within a portion of a header of the medical device. Such antennas are designed to provide increased antenna gain and antenna bandwidth.

The invention discloses an estimation method for a recovery ratio and a limit drainage radius of a low-permeability gas well. The estimation method comprises the following steps: estimating the limit drainage radius, and estimating the recovery ratio, wherein an estimation formula of the limit drainage radius is Re=(Pi-Pw) / [Theta];the step of estimating the recovery ratio comprises the following substeps: S1) calculating the volume (Vp=Pi[a0b0ze+1 / 2(a0+b0)c*Z<2>e+1 / 3C<2>Z<3>e]) of an elliptical table; S2) calculating the volume (V=Pi(a0+Re)(b0+Re)h) of an elliptical cylinder of a drainage area; and S3) calculating the recovery ratio ER=Vp / V. The estimation method has the following beneficial effects that the method is simple and quick, integrates the influences of a startup pressure gradient, a pressure-break length scale and well point abandonment pressure, brings forward a practical method used for estimating the average startup pressure gradient within the gas well drainage range by the early-period spot-measurement static pressure data of production performance, realizes the early evaluation of the limit drainage radius and the recoverable reserve of the gas well, and provides guidance for designing the reasonable well spacing of a low-permeability gas reservoir.

Apparatus for separating ash particles from a flue gas. The apparatus includes a screen that has a plurality of semi-elliptical cylinder surfaces. The semi-elliptical cylinder surfaces having holes through which said flue gas flows and through which the ash particles will not pass. The screen has a single layer for performing the separation in a manner such that the ash particles fall away from the screen and collect outside of the screen. A method of reducing velocity of a flue gas passing through screening apparatus for separating flue gas from ash particles. The method includes replacing a first screen of the screening apparatus with a second screen that has a plurality of semi-elliptical cylinder surfaces.

The invention discloses a method for designing an elliptic cylindrical surface transverse gradient coil based on spatial alternation. The method is characterized by comprising the steps that firstly, two shafts of the elliptic cylindrical surface where the gradient coil is located are defined to be in the direction x and the direction y, the shaft length of the elliptic cylindrical surface where the gradient coil is located in the direction x is 2a, the shaft length in the direction y is 2b, the wiring length in the axial direction is 2L, the strength of the gradient field is G, and the linearity is E; secondly, spatial alternation is utilized for converting the elliptic cylindrical surface into a cylindrical face, and the current density basis function and the expression are constructed under the cylindrical face; thirdly, a functional construction related to the current density is built, and the coefficient of the current density expression is obtained by solving the functional extreme value; fourthly, the solved coefficient of the current density expression is utilized for solving distribution of current density in the space, and the wiring shape of the gradient coil is obtained. The complex calculation of gradient coil designed through the network discrete method is avoided, and the high efficiency and precision are obtained.

The related method to detect image reconstruction algorithm by dynamic breast digital simulation model comprises: (1) using ellipsoidal and elliptical cylinder to form 3D dynamic breast model; (2) obtaining simulation projection data; (3) using the target algorithm to reconstruct the image with former data; (4) calculating the reconstruction performance for the algorithm as practical request; (5) changing model parameter, repeating former steps for further detection. This invention can determine the advantage and disadvantage for different algorithms.

The invention discloses a secondary optical lens device used for a high-power LED point light source, which comprises a lower part, a middle part and an upper part and is characterized in that a plurality of supporting legs are taken as the lower part and fixed with a base plate; the middle part is an elliptical cylinder, the bottom surface of which is provided with two circular arcs which are convex downwards and used for locating an LED, and the bottom surface of the elliptical cylinder is also provided with a circular arc shaped cylinder that is concave inwards; the upper part is a composite light-emitting surface formed by three curved surfaces which are smoothly connected with each other, and the whole composite light-emitting surface is a long ellipsoid. The secondary optical lens device leads the round lighting of the whole LED point light source to be transformed into uniform strip giant-scale lighting, so that an LED street lamp can provide uniform lighting along the direction extending along the street, and no waste and pollution of light exists at the roadside and house side, thus the light can be reasonably distributed and the effective utilization rate of light can be improved.

The invention provides a compound cyclone separator of a dust collector, comprising a handle, an air inlet, an elliptical separating structure provided with the handle and the air inlet at the upper part thereof, a round separating structure arranged above the center of the elliptical separating structure, an upper cover connected with the upper end of the round separating structure, a conical filter arranged in the center of the round separating structure, and a vent pipe which is connected at the lower end of the conical filter and extends out of the elliptical separating structure, wherein the round separating structure is composed of a drum and a drum bottom, the drum is provided with an air intake and a dust outlet; the elliptical separating structure is composed of a vertically arranged elliptical cylinder body and an elliptical cylinder body bottom with a central hole; and a coarse dust collecting part is formed between the drum and the elliptical cylinder body, and a fine dust collecting part is formed between the baseplate of the coarse dust collecting part and the elliptical cylinder body bottom. The invention can perform coarse dust separation on gases containing dust, thus avoiding that the conical filter is wound and blocked by light garbage. In addition, the invention has good separation effect for fine dust, compact structure and small volume.

Embodiments of systems and methods for estimating channel temperatures of a field effect transistor structure are disclosed. One method embodiment, among others, comprises receiving geometrical values corresponding to a field effect transistor (FET) structure, and associating the geometrical values of the FET structure to elliptical cylinder and prolate spheroidal coordinates to provide a closed form expression.

The invention provides a filter core for a down flow type filter cylinder dust remover, and belongs to the technical field of manufacture of dust removers. The filter core comprises an elliptical porous cylinder core, a wrinkle-shaped filter layer and coarse filter cloth, wherein the coarse filter cloth is covered on the periphery of the wrinkle-shaped filter layer; the wrinkle-shaped filter layer is in a similar stelliform elliptical cylinder-shaped structure and formed by folding a filtering material with certain length into winkles and adhering end to end; the inner edges of all the winkles are all distributed on the periphery of the elliptical porous cylinder core; winkle heights are symmetrically distributed relative to an elliptical short axis, and the winkle heights positioned at one side which corresponds to a semi-major axis positioned at each side of the elliptical short axis are h, and all the winkles positioned at the other side are divided into four equal pieces; and the winkle heights of each equal piece are sequentially h+d, h+2d, h+3d and h+4d by being far away from the endpoint of a long axis. The filter core disclosed by the invention enlarges the filter area of a windward side and increases the filter efficiency in such a way that the arithmetic sequence of the winkle heights accord with the flow regularity of air.

The invention discloses a novel mixer, which comprises a cylinder body, a linkage shaft, a stirring drive device, a humidity controller and a temperature controller. and a feed hopper is fixedly installed on the feed inlet, the linkage shaft passes through the cylinder and is fixedly installed on the top of the cylinder, and an insulation layer is fixedly installed outside the outer surface of the cylinder, and there is also a set between the insulation layer and the outer surface of the cylinder The isolation layer is fixedly installed with a suspension plate on the top of the cylinder. The suspension plate is a symmetrical distribution structure and is independently separated in the middle of the suspension plate. Jacking bolts are also provided at both ends of the suspension plate, and a suspension The combination of the humidity controller and the temperature controller forms an integral structure and is fixedly installed on the suspension bar. The invention overcomes the defects that the traditional stirring drive device supplies water regularly and quantitatively, and cannot control temperature and real-time adjustment, thereby improving the applicable surface and functionality of the stirring drive device.

The invention discloses a rehabilitation training system after an oral tumor radiotherapy and a use method thereof. The rehabilitation training system comprises a housing, an oral cavity opening and closing mechanism, a massage mechanism and a controller. The oral cavity opening and closing mechanism comprises an upper bite plate and a lower bite plate. The massage mechanism comprises an elliptical cylinder. Two ends of the elliptical cylinder are provided with rotating shafts. The outer ends of the two rotating shafts are connected with one end of an electric push rod through a Y-shaped connector. The other end of the electric push rod is fixed to the housing through a hinging shaft. A torsion spring is mounted on the hinging shaft. Two ends of the torsion spring are respectively fixed tothe housing and the electric push rod. The housing is internally provided with a first supporting plate and a second supporting plate which are vertical. The first supporting plate and the second supporting plate are parallelly arranged and are fixed to the inner wall of the housing. A bite plate control mechanism is arranged between the first supporting plate and the inner wall of the housing. The rehabilitation training system can realize automatic operation of the upper bite plate and the lower bite plate and facilitates use and management. Furthermore the rehabilitation training system can effectively improve oral cavity rehabilitation effect of a patient.

The invention discloses a ship body stabilizing and decelerating device. The device consists of a stabilizing fin, a rotating shaft, a motor and a turntable, wherein the stabilizing fin adopts an elliptic cylinder structure; the center of one end surface is connected with the rotating shaft; the axis of the elliptic cylinder and the rotating shaft are positioned on one straight line; the rotating shaft is connected with the motor; the motor is mounted on the turntable; and the turntable is connected with another motor. The ship body stabilizing and decelerating device has such advantages as delicate structure and convenience for use.

The invention provides a guide channel-shaped catalyst regular packing component in a plate-typed reaction rectifying tower, which is provided with a supporting frame, and a fixed leg is arranged below the bottom surface of the supporting frame; the top surface and the bottom surface of the supporting frame are uniformly welded with a plurality groups of metal sheets in the flowing direction of liquid on the tower plate so as to form an catalyst inserted-sheet channel; the distance of two adjacent groups of metal sheets is a flowing passage of liquid phase and gas phase on the guide tower plate; the catalyst inserted-sheet is filled with catalyst and is formed by a plurality of square prisms which have the cross section of rhombus and are made of metal wire meshes, hexagonal prisms with the cross section of shuttle shape or elliptical cylinders with the cross section of ellipse, in which the inserted-sheet are connected with each other from head to end; metal pressing strips and washer strips clamp the wire mesh through screws from two sides of the metal wire meshes and hang and button on the metal sheet on the top surface and the bottom surface so as to fix the inserted-sheet and form the guide channel-shaped catalyst structured packing component in the plate-typed reaction rectifying tower. The component solves the problem of low catalyst efficiency in the reaction rectifying tower, improves the separation efficiency of the plate-typed tower, has simple structure, and is convenient for processing, manufacture, installation and maintenance.

The invention discloses a method for establishing an elliptic cylinder conductive bridge model between a ground wire and a suspension clamp, and the method comprises the following steps: calculating the contact pressure between the ground wire and the suspension clamp, and calculating the cross section area of a conductive bridge through the contact pressure; after the cross section area of the conductive bridge is calculated, constructing a simulation model based on a ground wire and suspension clamp structure in finite element simulation software; in the simulation model, adopting a hull anda clamping plate of the suspension clamp for cutting the outer-layer wire strand, and obtaining an oval cutting surface; respectively adjusting the extrusion positions of the hull and the clamping plate of the suspension clamp until the area of the oval cutting surface is equal to the area of the cross section of the conductive bridge; and stretching the oval cutting surface to form an oval column conductive bridge. The method has very important significance in the research of the temperature rise state between the ground wire and the suspension clamp, and solves the problem that the calculation of the temperature rise state at the ground wire suspension clamp in the existing model is not accurate enough.

The invention provides a winding needle assembly and a winding device. The winding needle assembly comprises two clamping pins, a driving unit and a winding unit. The driving unit is connected with the winding unit and the two clamping pins. The driving unit can move the winding unit in order to deform the winding unit into a cylinder. The driving unit can also move the winding unit in order to deform the winding unit into an elliptical cylinder. The winding unit is configured to wind a material strip. When the winding unit is deformed into the elliptical cylinder, the two clamping pins get away from each other to release the material strip. When the winding unit is deformed into the cylinder, the two clamping pins get close to each other to clamp the material strip. Thus, the winding needle assembly provided by the invention can not only produce a high-quality battery cell for a square battery, but also can be prevented from rotating by complex programming, thereby greatly reducing development time and cost. The winding device includes the winding needle assembly, and thus has all technical features and beneficial effects of the winding needle assembly.

The invention relates to a human IgG4 (immunoglobulin G4) antibody adsorption column and a preparation method and application thereof. The human IgG4 antibody adsorption column comprises a column body and is characterized in that two ends of the column body are closed, a connection pipe is arranged at each of the two closed end of the column body, an adsorbent is filled in an inner cavity of the column body and consists of a ligand and a carrier, an anti-human IgG4 antibody serves as the ligand, the carrier is selected from agarose microspheres, polystyrene microspheres or magnetic beads, and the column body is in a shape of a cylinder, an elliptical cylinder or a polygonal column. The preparation method includes: sealing one end of the column body, arranging one of the connection pipes at the sealed end, and filling the absorbent into the inner cavity of the column body; sealing the other end of the column body, arranging the other connection pipe at the sealed end to obtain the human IgG4 antibody adsorption column. Purification of human IgG4 from human blood is realized by the aid of the human IgG4 antibody adsorption column, and recycling of the human IgG4 antibody adsorption column is realized. The human IgG4 antibody adsorption column has advantages of high efficiency and specificity in human IgG4 antibody purification and lays a foundation for IgG4 research and application.

The invention discloses sanitary foot wiping cloth, which comprises a rubber layer (2) and a towel layer (1) which is tightly attached to the outer wall of the rubber layer (2), wherein the rubber layer (2) and the towel layer (1) form an elliptical cylinder with two opening ends; the rubber layer (2) is made of soft rubber or other impermeable soft materials; the towel layer (1) is made of materials such as a towel or other water absorption cloth materials; a suspension hole (3) and a suspension hole (4) are formed at the upper end and the lower end of the rubber layer (2) respectively and are positioned on the two opposite sides of the rubber layer (2) respectively; the towel or the water absorption cloth materials are not adhered in an area close to the suspension holes (3 and 4); and a plurality of small bulges (5) are distributed on the inner wall of the rubber layer (2). The invention has the advantages that: a hand of a user cannot be contacted with the towel layer (1) all the time in the process of using the sanitary foot wiping cloth, so that the aim of sanitation is fulfilled.

The invention relates to a secondary optical lens of an LED street lamp, which consists of inner and lower curved surfaces. The LED lamp is positioned in a groove formed by the inner curved surface of the lens. The secondary optical lens is characterized in that the outer curved surface of the lens is a curved surface formed by cutting a torus and an elliptical cylinder, the upper surface of the curved surface is an elliptical spherical surface, the cross section is a fan-shaped plane, the side inclined plane is an oblique arc curved surface, and the bottom surface is a plane; and the inner curved surface is formed by combining an oblique plane and an elliptical groove. All surfaces of the optical lens are combined by simple curved surfaces, so engineering molding is easy to realize; the integral curved surface is convex and has no concave surface combination, so the secondary optical lens can well reduce the influence of environmental dust on the lens effect; and the secondary optical lens has obvious secondary light distribution effect on the LED, increases the light efficiency utilization rate of the street lamp, improves the distribution uniformity of the light intensity and can reduce the influence of practical engineering installation on the light efficiency.

The invention relates to a fiber Rayleigh scattering signal detector of the optical communications technology field. The invention comprises an elliptical quartz cylinder which is composed of two semi-ellipse cylinders cut along the prolate axis, two circular channels with the same size at the two focused points of the semi-ellipse cylinders, wherein one circular channel is provided with a photodetector with the same channel size and length. A rogue fiber, after being stripped, is put into one circular channel at one focused point of the semi-ellipse cylinder and cylindrical photoelectric detector is put into the other circular channel at the other focused point of the semi-ellipse cylinder. The highly reflective metal film coated outside the semi-ellipse cylinder can realize the full reflection of lights in the elliptical cylinder. The collection structure can effectively improve the collection efficiency of optical signal and has the advantages of simple structure, low cost, simple assembly and the like.

The invention relates to a rotary engine. The internal cavity of the invention is made up of stator with elliptical cylinder or cinquefoil, cylinder type rotator, stator end cover, axis, bearing, base. The coaxial rotator and stator form 2-6 arc chambers, half of them is connected to the discharging aperture, and there has a firing device on the stator of the arc chamber; there arranges with spring and concave channel on the rotator symmetrically, the spring pushes the sliding board, another end of the sliding board is contacted to the internal surface of the stator and is sealed. The rotator rotates and absorbs the air into the aperture and is compressed, and the air enters the explosion chamber through the gap between the stator and the rotator, the firing device fires the gas, the generated explosion gas rotates to work around. The engine efficiency is high, the structure is simple, and the inlet and the discharging outlet need not single valve.

The invention provides a novel baffle-rod longitudinal-flow shell-and-tube heat exchanger. The novel baffle-rod longitudinal-flow shell-and-tube heat exchanger comprises a heat exchange tube (5) and a plurality of groups of baffle rods (7), wherein the heat exchange tube (5) and the plurality of groups of baffle rods (7) are positioned in a shell (8), the plurality of groups of baffle rods (7) are uniformly distributed and are arranged at intervals, and each group of baffle rod can rotate around the elliptical cylinder axis of the baffle rod. According to the novel baffle-rod longitudinal-flow shell-and-tube heat exchanger, by regulating the baffle rods of the special structure, the flowing state of a shell-pass fluid can be changed, and the heat exchange capability of the heat exchanger can be regulated within a certain range; in the condition that fluid inlet conditions cannot be changed, the baffle rods of the special structure are rotated, the turbulence intensity of the shell-pass fluid is changed, and parameters of temperature, pressure and the like of a fluid outlet are regulated, so that the requirements of different working conditions in practice are satisfied. The novel baffle-rod longitudinal-flow shell-and-tube heat exchanger has the advantages of simple structure, convenience in regulation, wide application range and the like.

The invention belongs to the technical field of laser, and provides a radiating method for a high-power diode pump laser. The radiating method for the high-power diode pump laser at least comprises a base seat, a radiating cavity and a fan. The radiating method for the high-power diode pump laser is characterized in that a groove is formed in the base seat, and laser medium is placed in the groove; the radiating cavity is a cuboid or cylinder or elliptical cylinder structure without a bottom surface, the radiating cavity is bonded with the base seat to form an enclosed space, the laser medium and cooling liquid are placed in the enclosed space formed by the radiating cavity and the base seat, a liquid inlet is formed in the top of the radiating cavity, and a liquid outlet is formed in the bottom of the radiating cavity; and the fan performs wind cooling radiating for the radiating cavity from one side face of the radiating cavity. Due to the method, the laser medium is completely soaked into the cooling liquid for cooling, the problems that radiating efficiency is low and radiation is uneven are avoided, and a radiating device for the high-power diode pump laser is provided.

The invention relates to a pneumatic deepwater bottom mud sampling device. A shell is an oval cylinder which has a large middle and small two ends and consists of a drum and two barrels, the two barrels are respectively connected to two ends of the drum, and each barrel has one big end and one small end; a bottom plate is fixed at the lower end of the shell, a hole is formed in the middle of the bottom plate and is used as a sampling opening, a sphere floats in the shell and is in contact with the sampling opening, the radian of the sampling opening is the same as that of the sphere, an uppercover plate is fixed at the upper end of the shell, an air feeding and discharging tube is fixed on the upper cover plate, is connected with an air compressor and is used for feeding high-pressure airto the shell and discharging the high-pressure air from the shell; a hanging bracket is welded to the top of the upper cover plate and is connected with a winch on an operation boat through a mooringrope; a cross rod is welded to the inside of the shell; the lifting height of the sphere is controlled; and three balancing plates which form angles of 120 degrees mutually are fixed on the outside of the lower end of the shell, so that the sampling device is always in a vertical state in a suspension process during working. The pneumatic deepwater bottom mud sampling device has the advantages that the structure is simple, positioning and depth fixing are accurate, sampling button mud is not disturbed, one-time sampling is implemented, detection is accurate, and working efficiency is high.

The invention provides a plastic granulating air-cooling hot-cutting device which comprises a discharge mold head, an air cooler, an air-cooling hot-cutting hood body and a material cutting assembly.The air-cooling hot-cutting hood body is a closed elliptical cylinder which is wide upward and narrow downward; the material cutting assembly comprises a motor, a slicer rack mounted at the output endof the motor and a plural of blades mounted on the slicer rack; a cover port is formed in one end surface of the air-cooling hot-cutting hood body, the motor is mounted on the other end surface of the air-cooling hot-cutting hood body, a cover matched with the cover port is arranged on the cover port, the discharge mold head is mounted in the cover in an embedded manner, the plurality of blades are inclined to a discharge face of the discharge mold head, an air inlet and an air outlet are formed in the lower bottom of the air-cooling hot-cutting hood body, and the air inlet of the air-coolinghot-cutting hood body communicates with the air outlet of the air cooler. Compared with the prior art, the plastic granulating air-cooling hot-cutting device provided by the invention is simple in structure, and the maintenance cost of periodically cleaning particles stuck to the air-cooling hot-cutting hood body is cancelled.

The invention discloses a gas hybrid bearing based on a turbine engine. The bearing comprises a main shaft and an elliptical bearing bush, wherein an elliptical cylindrical space is formed in the middle of the elliptical bearing bush. A plurality of combinations of slits and nozzles are arranged on the circumferential surface of the elliptical bearing bush, and the slits are communicated with an air pump through an air passage. A main shaft is coaxially arranged in the elliptic cylindrical space in the elliptic bearing bush, a plurality of grooves are formed in the circumferential face of the main shaft, and the positions of the grooves correspond to the positions of the nozzles. The space in the elliptical bearing bush and the cylindrical main shaft form a wedge-shaped space, and the wedge-shaped space is overlapped with a dynamic pressure air film generated by a groove of a wedge-shaped structure formed in the main shaft to form a double dynamic pressure air film effect, so that the rigidity of the dynamic pressure air film in the bearing is improved, the bearing has higher bearing capacity, and the air bearing can work at high and low speeds; and the curvature radius of the bearing bush is increased, so that the absolute eccentric distance of the journal in the bearing bush is increased, and the stability of the bearing is improved.

The invention discloses a multi-angle adjustable solar outdoor liquid crystal display device, comprising at least two upright posts; a pair of annular sliding grooves which are fixedly arranged at theupper ends of at least two upright columns corresponding to each other, the upper end and the lower end of the shell of the elliptical cylinder structure are provided with a pair of circular slidingrings; a pair of annular sliding rings which are slidably connected with the sliding rails in the pair of annular sliding grooves through two sets of sliding blocks; a pair of liquid crystal panels and two groups of solar panels which are alternately arranged on the side walls of the housing; a pair of first wind speed sensors are respectively arranged on the border frames of a pair of liquid crystal screens; A pair of second wind speed sensors which are respectively arranged on two groups of solar panels; a drive assembly which includes an annular rack; a driving motor and a gear; and an MCU.The invention can adjust the display position of a pair of liquid crystal screens according to the real-time wind direction and wind force, so as to prolong the service life of the pair of liquid crystal screens. And the device effectively utilizes the solar energy for supplying power, thereby realizing energy conservation and environment protection.

The invention discloses a stretching forming process for a stainless steel elliptical-table-shaped ice bucket. The stretching forming process for the stainless steel elliptical-table-shaped ice bucketcomprises the following forming steps: (1) stretching a stainless steel sheet into a first blank ice bucket which is formed by sequentially connecting a cylindrical bucket body containing a bucket opening and a first elliptical bucket bottom; (2) stretching the first blank ice bucket into a second blank ice bucket which is formed by sequentially connecting an elliptical-cylinder bucket body containing a bucket opening and a second elliptical bucket bottom; (3) stretching the second blank ice bucket into a third blank ice bucket which is formed by sequentially connecting an elliptical-table bucket body containing a bucket opening and a third elliptical bucket bottom; and (4) cutting off cutting residual edges on the third blank ice bucket to finally obtain the elliptical-table-shaped ice bucket. The stretching forming process for the stainless steel elliptical-table-shaped ice bucket has the following advantages: the whole stainless steel sheet can be stretched to form the elliptical-table-shaped ice bucket through a stretching process; and welding treatment is not required in the whole production process, so that the quality of the ice bucket is greatly improved, and the production efficiency of the ice bucket is further greatly increased.

A high gain circularly polarized antenna including transverse mounting plates, A plurality of evenly distributed round holes are arranged on the top surface of the mounting plate, An upper end of thatround hole is provide with a first cylinder, the inner part of the first cylinder is a trumpet-shaped cavity with a large upper end and a small lower end, the lower end of the first cylinder is provided with a second cylinder, The upper end of the second cylinder body is inserted into the corresponding circular hole, and the lower end of the second cylinder body is provided with a third cylinderbody, the first cylinder body, the second cylinder body and the third cylinder body are coaxial in the same vertical direction, the second cylinder body is a low-frequency resonant cavity, the third cylinder body is a high-frequency resonant cavity, and the low-frequency resonant cavity and the high-frequency resonant cavity are both elliptical cylinders. The upper port of the horn-shaped cavity is closed at any time by two semi-circular cover plates which are matched, so that external impurities can be avoided to enter the low-frequency resonant cavity and the high-frequency resonant cavity,thereby affecting the stability of the signal emitted by the invention. The invention simplifies the processing technology, reduces the manufacturing difficulty and reduces the production cost throughthe modular design.