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70results about How to "Avoid angles" patented technology

Optical lens

PendingCN119575609Aexpand field of viewGuaranteed Effective WidthMountingsOphthalmologyOptical axis
The invention provides an optical lens. The optical lens comprises a lens barrel, and a first lens, a second lens, a third lens and a fourth lens which are sequentially arranged in the lens barrel from an object side to an image side; the spacing element group at least comprises a second spacing element and a third spacing element, and the inner diameter d0m of the image side end face of the lens barrel and the curvature radius R8 of the image side face of the fourth lens meet the condition that d0m / R8 is larger than or equal to 2.6 and smaller than or equal to 8.67; the combined focal length f34 of the third lens and the fourth lens, the center thickness CT4 of the fourth lens on the optical axis, and the minimum distance EP23 between the second spacing element and the third spacing element in the extension direction of the optical axis meet the condition that f34 (EP2 + CT4) is larger than or equal to 1.04 and smaller than or equal to 2.36. According to the invention, the problem that the maximum angle of the optical lens when the light is converged to the chip is not matched with the chip in the prior art is solved.
Owner:ZHEJIANG SUNNY OPTICAL CO LTD

Preparation method of casting with complex pipe cavity and mold

The invention relates to the technical field of metal casting, in particular to a preparation method of a casting with a complex pipe cavity and a mold, and the preparation method comprises the steps of mold core preparation, wax mold design, basic wax mold preparation, integral wax mold preparation, mold shell preparation and smelting and pouring. The basic wax mold preparation comprises the step of designing a plurality of block wax molds according to a casting pipe cavity structure; the whole wax mold preparation comprises the steps that a mold core and a plurality of block wax molds are combined and assembled through a splicing tool, so that the mold core is arranged in a multi-angle special-shaped pipe cavity defined by the block wax molds, and a whole wax mold is obtained; wherein partial areas of at least partial pipe bodies of the mold core are the same as the inner diameter of the multi-angle special-shaped pipe cavities in the corresponding positions so as to be precisely matched, and the rest partial areas of at least partial pipe bodies are arranged in the multi-angle special-shaped pipe cavities in a suspended mode. By means of the preparation method, it can be guaranteed that the block wax mold is accurately matched with the mold core, and the size precision of an inner cavity of a later casting can be guaranteed through the size precision of the mold core.
Owner:BAIMTEC MATERIAL CO LTD

Gynecological clinical vaginal secretion sampling device

The invention discloses a gynecological clinical vaginal secretion sampling device, and relates to the technical field of medical instruments, the gynecological clinical vaginal secretion sampling device comprises at least two independent sampling devices, every two adjacent independent sampling devices are in vertical sliding connection, and each independent sampling device comprises a protective shell with a cavity structure; the sampling mechanism penetrates through the protective shell and comprises a manual operation part, a rotating rod vertically and upwards connected to the manual operation part and a sampling air bag connected to the top end of the rotating rod, and the sampling air bag is enlarged to be attached to the inner wall of the vagina by pushing the manual operation part upwards; the adjusting mechanism is arranged on one side of the sampling mechanism and is in transmission connection with the sampling mechanism through a transmission mechanism, so that the sampling air bag deviates towards the periphery and is used for attaching the sampling air bag to the inner wall of the vagina, and sampling is facilitated. According to the sampling device, the height and the angle of a sampling part can be flexibly adjusted, samples can be conveniently collected and stored, discomfort can be reduced to the maximum extent, and injuries can be avoided.
Owner:NORTHWESTERN POLYTECHNICAL UNIV

Sample introduction device and detection system

The embodiment of the invention provides a sample introduction device and a detection system, the sample introduction device is applied to a liquid crystal optical sensing system, and the sample introduction device comprises: a housing, the upper surface side of which is provided with a sample introduction port and a detection port; the detection assembly is arranged on the upper surface side of the shell and communicated with the detection port, and the detection assembly comprises a liquid crystal detection chip used for making contact with detection liquid to assist in sensing optical images; the plurality of conveying channels are arranged in the shell, are respectively connected with the sample inlet and the detection port, and are used for receiving the detection liquid and conveying the detection liquid to the detection port, so that the detection liquid is in contact with the liquid crystal detection chip; and the light-transmitting component is arranged in the shell and is used for receiving and transmitting light to the detection port. The sample injection device can accurately and stably realize injection of detection liquid, and the repeatability and the stability of a detection experiment are improved.
Owner:SOUTH CHINA NORMAL UNIV

Anti-falling pin drilling positioning auxiliary device and drilling machining equipment

The invention relates to the field of sheet metal machining equipment, in particular to an anti-falling pin drilling positioning auxiliary device and drilling machining equipment. The anti-disengaging pin drilling auxiliary positioning device comprises a positioning seat, a horizontally-penetrating positioning hole is formed in the positioning seat, a hard alloy drill bushing is perpendicularly fixed to the top face of the positioning seat, and a bottom hole of the drill bushing intersects with the positioning hole; a horizontal clamping groove is formed in the positioning seat, and the position of the horizontal clamping groove corresponds to that of the anti-falling pin clamping groove of the anti-falling pin; a horizontal clamping groove blocking piece is installed in the horizontal clamping groove and is in micro-clearance fit with the anti-falling pin clamping groove. A chip groove is formed in the positioning seat and located under the drill bushing bottom hole and above the horizontal clamping groove blocking piece. The drilling tool is simple in structure and convenient to machine, the perpendicularity and the position precision of anti-falling pin drilling can be ensured, rotation in the machining process is prevented, and the machining efficiency is improved.
Owner:ZHUZHOU TIMES METAL MFG CO LTD

A microscopic image acquisition and processing system and textile fiber classification method thereof

The present invention relates to a microscopic image acquisition and processing system and a textile fiber classification method thereof, which comprises an image acquisition module, a FIFO buffer, a DDR5 control module, an image data processing module, a display drive module, a read-only memory, an I 2 C interface, CMOS image sensor, high-definition multimedia interface and memory, the CMOS image sensor is connected to the image acquisition module, the image acquisition module is connected to the FIFO buffer, the FIFO buffer is connected to the DDR5 control module, the DDR5 control module is connected to the memory, the FIFO buffer is connected to the image data processing module, the image data processing module is connected to the display driver module, the display driver module is connected to the high-definition multimedia interface, the read-only memory is connected to I 2 C interface. The present invention enhances the effectiveness of extracting feature data with complex relationships, thereby improving the classification accuracy of the SVM classification model for fibers.
Owner:JIANG SU CHENG XIN JIAN YAN JIAN CE REN ZHENG GU FEN YOU XIAN GONG SI

A processing device for contact pieces of electronic components and a bending method thereof

The present invention relates to the field of contact terminal processing, and specifically to a processing device for contact pieces of electronic components and a bending method thereof, comprising a pre-fixing mechanism, which is used for pre-clamping processing of contact terminals, a processing table being fixedly installed on the outer side of the pre-fixing mechanism; a clamping mechanism, which is used for fixing processing of the required bending part of the contact terminal; a bending mechanism, which is used for bending processing of the contact terminal; a support frame being fixedly installed on the outer side of the processing table, the bending mechanism being arranged inside the processing table, and the clamping mechanism being arranged on the top of the processing table. The processing device for contact pieces of electronic components and the bending method thereof will move to the right along a short track through a double insertion strip, and the other end thereof will also slightly squeeze the bent contact terminal for a second time, thereby preventing the contact terminal from being subjected to incomplete force and causing a certain degree of rebound, resulting in the actual bending angle being inconsistent with the expected angle.
Owner:NANJING YINMAO MICROELECTRONICS MFG CO LTD

Water channel airtightness detection jig capable of self-adapting to deflection error

The invention relates to the technical field of air tightness detection, and discloses a deflection error self-adaptive water channel air tightness detection jig which comprises a tray, a handle is fixedly connected to the upper surface of the tray, a motor assembly is fixedly connected to the upper surface of the tray, and a telescopic rod is fixedly connected to the upper surface of the tray. A self-adaptive device is arranged on the upper surface of the tray, an auxiliary fixing device is arranged on the upper portion of the telescopic rod, the self-adaptive device comprises a linear sliding rail, and a tension spring is fixedly connected to the upper portion of the linear sliding rail. By means of the air cylinder, the bracket, the sliding block, the linear sliding rail, the tension spring, the movable frame and the guide block, when a product is placed on the tray, the guide block can be pushed along with the angular deviation of a water channel of the product, and when the water channel deviates, the tension spring can deform through the elasticity of the tension spring and guide the water channel; therefore, the mechanism can be suitable for various products with water channel angle deviation.
Owner:CHONGQING MOSES ROBOTS CO LTD

Visual detection mechanism of vehicle lamp detection equipment

The utility model discloses a visual inspection mechanism for vehicle lamp inspection equipment, which belongs to the technical field of vehicle lamp inspection and comprises an inspection table, and a vehicle lamp body and an image acquisition camera are fixedly connected to the front end and the rear end of the top surface of the inspection table respectively. Supporting mechanisms are arranged at the positions, close to the two sides, of the top of the detection table, a pair of fixing strips is fixedly connected to the center of the top face of the detection table, a driving motor is fixedly connected to one end of each fixing strip, a lead screw is fixedly connected to the output end of each driving motor, and a ball sliding block is arranged on the outer side of each lead screw in a sleeving mode; according to the scheme, the reflecting part can be quickly mounted and dismounted, the efficiency of visual inspection of the vehicle lamp is improved, the moving stability of the reflecting plate can be guaranteed, the problem of angle inclination of the reflecting plate can be avoided, and the detection effect is improved.
Owner:TIANJIN JINGPU TECH

Supporting device for hip joint

The utility model provides a hip joint supporting device which aims at solving the technical problem that existing equipment is not beneficial to movement of a patient. The supporting device comprises two supporting plates, the middle of each supporting plate is provided with a movable part of a hollow structure, and one end of each supporting plate is provided with a movable hole communicated with the corresponding movable part; the two supporting rods correspond to the two supporting plates respectively, one ends of the supporting rods penetrate into the movable parts from movable holes in the supporting plates, the two ends of the connecting block are hinged to the ends, located outside the supporting plates, of the two supporting rods respectively, and the two ends of the connecting block are each provided with a positioning rod; the limiting block is arranged on the supporting rod, and a proximity switch which can be triggered by the positioning rod is arranged on the limiting block; the two springs are arranged on the two supporting rods in a sleeving mode, located in the movable part and used for driving the supporting rods to contract towards the interior of the supporting plate; and the alarm is arranged on one supporting plate. The supporting device has the advantage of being capable of well moving along with the joints of the patient.
Owner:CHENG DU XIN AO GUAN MEDICAL EQUIP

High-stability monitoring camera

The utility model relates to a high-stability monitoring camera applied to the field of monitoring equipment, which comprises a fixed plate, the lower end of the fixed plate is rotatably connected with a turntable, the lower end of the turntable is fixedly connected with a limiting block, the lower end of the limiting block is fixedly connected with a U-shaped block, and the lower end of the U-shaped block is provided with a camera body. Adjusting blocks are arranged at the left front end and the right front end of the camera body, mounting blocks are rotationally connected to the left rear end and the right rear end of the camera body, the upper ends of the adjusting blocks and the upper ends of the mounting blocks are fixedly connected with the lower end of the U-shaped block, a plurality of limiting grooves distributed in an annular array around the central axis of the rotating disc are formed in the outer surface of the limiting block, and clamping blocks are fixedly connected into the limiting grooves; by adopting the structures such as the limiting block, the camera is limited and fixed in the use process, so that the camera is effectively prevented from generating relatively large position deviation, the camera is effectively prevented from shaking when encountering external collision, and the stability of the camera is further improved.
Owner:TANGSHAN XINTIAN TECH CO LTD

Cosmetic brush with round head

ActiveCN224806089Uadjustable anglefit tightly
The utility model provides a round head movable head cosmetic brush, include: handle, set up the connecting seat of handle upper end and set up the brush head subassembly on the connecting seat, the brush head subassembly includes the cup shape brush head seat of accommodating brush bundle and the brush bundle fixed in it, the brush head seat is connected with the connecting seat through the pivot hinged component along the transverse pivot, is equipped with the positioning mechanism between both, can be in multiple angular position to the brush head subassembly is positioned stably, pivot hinged component is by fork support, ear seat and the shaft pin through it constitute, positioning mechanism adopts the gear ring structure of intermeshing and forms the angle positioning and the damper of grade type, sets up the circular arc transition surface and the annular compression ring in the brush head seat to firm brush bundle. This cosmetic brush can adjust the brush head angle according to the different area of face, uses the nature of close, and positioning is stable, and brush bundle can be dismantled and washes, and the structure is stable, holds comfortably, significantly promotes the convenience and the makeup effect uniformity of makeup.
Owner:BEAUTY YAURIENT COSMETICS ACCESSORIES CO LTD

Automatic packaging device for crop protection product carbosulfan crude oil

The utility model discloses an automatic packaging device for crop protection product carbosulfan crude oil, which relates to the field of automatic packaging and comprises a liquid storage tank and a feed port arranged in the middle of the top end of the liquid storage tank, and a discharge port is arranged in the middle of the bottom end of the liquid storage tank. Mounting frames are arranged below the liquid storage tank, and a conveying belt is arranged on one side between the mounting frames through a connecting roller. According to the automatic packaging device for the crop protection product carbosulfan crude oil, a conveying belt pushes a filling bottle to one side, so that the filling bottle pokes a striking structure, a pressing plate is reset through the elastic force of a connecting spring, meanwhile, the pressing plate drives a drawing rod and a piston to move towards one side in a fixing rod, and the filling bottle is driven to move towards the other side; and liquid in the discharging port moves into the fixing rod through the connecting pipe due to air pressure change and is adsorbed, the problem that the liquid is left in the discharging port and drips is solved, and meanwhile redundant liquid crude oil can be adsorbed.
Owner:HAILI GUIXI CHEM PESTICIDE CO LTD

Grating compression device, compression method thereof and fiber laser system

The invention provides a grating compression device, a compression method thereof and an optical fiber laser system. The grating compression device, the compression method thereof and the optical fiber laser system have the following beneficial effects that after being diffracted by the grating in the cavity, laser is reflected between mirrors such as the grating in the device to be compressed, and a light beam compressed by the grating can be translated by a certain distance in the vertical direction and is transmitted in the reverse direction through the basic turn-back mirror; the volume of the grating compressor is effectively reduced, and the cost is saved; and the angle between the incident laser and the grating pair and the distance between the grating pairs are adjusted through electric control, so that the device is adaptive to different laser systems, high-precision control of dispersion compensation amount is realized, and introduction of mechanical clearance or angle deviation caused by manual adjustment is avoided.
Owner:INSTITUTE OF PHYSICS CHINESE ACADEMY OF SCIENCES

Preparation method of shell containing multi-angle special-shaped pipe cavity

The invention provides a preparation method of a shell containing a multi-angle special-shaped pipe cavity, which comprises the following steps: combining and assembling a mold core and a plurality of block wax molds, so that the mold core is arranged in the multi-angle special-shaped pipe cavity defined by the plurality of block wax molds, partial areas of at least partial pipe bodies of the mold core are the same as the inner diameters of the multi-angle special-shaped pipe cavities in the corresponding positions so as to be precisely matched, and the rest partial areas of at least partial pipe bodies are arranged in the multi-angle special-shaped pipe cavities in a suspended mode to obtain a casting wax film; a surface layer shell and a back layer shell are prepared on the surface of a casting wax film in sequence, and then sectional continuous dewaxing roasting is adopted to prepare the shell. According to the invention, a multi-dimensional matching relationship is formed by the plurality of pipe bodies distributed at multiple angles of the mold core and the block wax mold, so that the accurate matching of the block wax mold and the mold core is ensured, and the dimensional accuracy of the inner cavity of a later casting can be ensured by utilizing the dimensional accuracy of the mold core.
Owner:BAIMTEC MATERIAL CO LTD

A magnetic current sensor

The present application provides a magnetic current sensor, which relates to the field of magnetic field measurement technology. The sensor includes: a current conductor to be measured, a magnetic focusing ring, a differential magnetic field generation module and a differential detection module. The differential magnetic field generation module includes: a magnetic field conversion unit and at least two magnetic induction units. The magnetic focusing ring gathers and amplifies the annular induced magnetic field generated by the current conductor to be measured and passes it through the opening of the magnetic focusing ring. The magnetic field conversion unit located at the opening of the magnetic focusing ring forms a magnetic flux path through the magnetic conductivity of a high magnetic permeability metal soft magnetic material, and uses the magnetic flux path to convert the direction of the magnetic field. A magnetic field component parallel to the plane where the magnetic induction unit is located is generated at the air gap of the magnetic flux path, and then a differential voltage signal is generated and detected by the differential detection module. The differential detection of the annular iron core structure combined with the single-sensitivity direction magnetic induction unit can be realized, and the single-chip integrated manufacturing can be achieved. The sensitivity consistency is good, the precision is high, the anti-interference ability is strong, and the application range is wide.
Owner:MULTIDIMENSION TECH CO LTD

Variable angle forceps

The utility model discloses a variable angle pliers, including pliers main part, pliers main part includes pliers head, pliers body and limit structure, and pliers head is connected with pliers body through limit structure, and limit structure includes limiting block, elastic part and limiting device, limiting block sets up two, and two limiting blocks are connected through elastic part, and limiting device includes limit plate, and limit plate fixedly sets up at pliers head bottom and pliers body top, is provided with the occlusion of cooperation with limiting block on limit plate, only needs simple press - rotation - loose action to complete angle switching and locking, operation is extremely convenient and efficient, need not help additional tool, and pliers head working angle can be adjusted according to the operation space and operation demand quickly, and the complex scene that traditional pliers is difficult to enter or operate is easily coped with.
Owner:HANGZHOU WINTOOLS TECHNOLOGY & DEVELOPMENT CO LTD

Shirt back panel cutting piece processing device

ActiveCN119111896AEasy to fixGuaranteed extrusion strengthMechanical cleaningPressure cleaningMechanical engineering
The invention discloses a shirt back panel cutting piece processing device which comprises a machine box, a processor is fixedly connected to the top of the machine box, a placing plate is fixedly connected to the position, close to the processor, of the machine box, a storage box is fixedly connected to the position, away from the placing plate, of the machine box, and the shirt back panel cutting piece processing device further comprises an auxiliary assembly, the auxiliary assembly is fixedly connected to the position, close to the containing plate, of the case. The adjusting assembly is fixedly connected to the top of the case; and the clamping roller frame is fixedly connected to the position, away from the adjusting assembly, of the machine box, and a limiting plate is fixedly connected to the inner surface of the clamping roller frame. According to the shirt back panel cutting piece processing device, the limiting plate is used for fixing the clamping roller frame, then the squeezing force of the clamping roller frame on a shirt is guaranteed, it is guaranteed that the clamping roller frame makes full contact with the shirt, the adjusting assembly and the auxiliary assembly can be matched with each other, and the phenomenon that the shirt protrudes or is too large in inclination angle during processing is prevented.
Owner:SUQIAN BAOZITOU GARMENTS TECH

Pneumatic pipe flaring auxiliary feeding frame

The utility model relates to the field of pipe fitting flaring, and discloses a pipe pneumatic flaring auxiliary feeding frame which comprises a supporting structure, the supporting structure comprises a supporting cylinder, a lead screw is fixedly installed in the supporting cylinder, a lifting rod is connected to the outer portion of the lead screw in a sleeved mode, and the top of the lifting rod extends to penetrate through the supporting cylinder and is provided with a feeding structure. The feeding structure comprises a feeding frame, the bottom end of the feeding frame is inserted into the top of the lifting rod through a rolling bearing, a feeding sliding groove is formed in the top of the feeding frame, an ejection block is slidably installed in the feeding sliding groove, a telescopic rod is installed at one end of the ejection block through a connecting bolt, and the other end of the telescopic rod extends to penetrate through the feeding sliding groove and is inserted with an electric cylinder; one end of the electric cylinder is installed on the feeding frame through a bolt. The feeding mechanism has the advantages that the lifting rod is rotated to be in threaded engagement with the lead screw, the horizontal height of the feeding structure is adjusted, the problem that the feeding height or angle is insufficient is solved, and the feeding efficiency and accuracy are effectively improved.
Owner:JINGZHOU TIANYU AUTO PARTS CO LTD

Automatic Valve Assembly and Control System Based on Intelligent Vision

This invention belongs to the field of industrial automated assembly technology. It provides an automated control system for valve assembly based on intelligent vision. During the intelligent vision-assisted assembly of valves, the system detects whether there is an angle between the valve stem axis and the valve body flow channel axis, and determines whether the actuator is perpendicular to the valve body mounting surface. If not perpendicular, it analyzes the uniformity of the bolts distributed on the actuator flange to assess the uniformity of the force. From the perspective of installation accuracy, combined with real-time monitoring and feedback of the installation angle using intelligent vision technology, the bolt tightening force can be adjusted in a timely manner to ensure that the actuator flange is perpendicular to the valve body mounting surface. This ensures that the valve stem axis coincides with the valve body flow channel axis. Furthermore, uniform force distribution reduces the superposition effect caused by uneven force distribution, prevents an angle between the valve stem axis and the valve body flow channel axis, ensures the consistency of the valve stem and valve body flow channel axes, and makes the internal mechanical structure of the valve meet design requirements, thereby improving the assembly quality of the valve.
Owner:ZHEJIANG UNIV

Container type movable shielding room

The utility model relates to the field of shielding chambers, and discloses a container type movable shielding chamber which comprises a box body and a bottom frame, a shielding door is rotatably installed on the surface of the box body, a plurality of rolling wheels are rotatably connected to the bottom end of the bottom frame, a sliding rail is fixedly installed on the inner wall of the bottom frame, and a plurality of sliding blocks are slidably connected to the surface of the sliding rail; a rotating frame is rotationally installed at one end of the sliding block, a supporting rod is rotationally connected to the end, away from the connecting position of the rotating frame and the sliding block, of the rotating frame, and the top of the bottom frame and the bottom end of the box body are fixedly installed; the bottom frame is installed at the bottom end of the box body, a sliding rail is welded to the inner wall of the bottom frame, a plurality of sliding blocks are slidably connected to the surface of the sliding rail, one end of each sliding block is rotationally connected with a rotating frame, and one end of each rotating frame is rotationally connected with a supporting rod at the bottom end of the bottom frame so that the sliding blocks can slide at the upper end of the sliding rail; and therefore, the rotating frame and the supporting rod are controlled to be rotationally connected with each other, and the bottom end of the box body is supported through the rotating frame and the supporting rod.
Owner:CHANGZHOU HENGLI ELECTROMAGNETIC SHIELDING EQUIP CO LTD

Heavy truck chassis wire harness assembly tool

The utility model relates to the technical field of tools, and discloses a heavy truck chassis wire harness assembly tool which comprises an assembly plate and a displacement groove formed in one side of the surface of the assembly plate, and further comprises a sliding block sliding on the inner wall of the displacement groove, a mounting base is connected to the top of the sliding block in a bolted mode, a sleeve is connected to one side of the top of the mounting base in a bolted mode, and the sleeve is connected to the inner wall of the displacement groove in a bolted mode. A mounting groove is formed in the sliding block, a lifting mechanism is arranged in the mounting groove, and a connecting rod is arranged on one side of the lifting mechanism; through the cooperation of the lifting mechanism, the auxiliary frame and the connecting rod, workers do not need to disassemble the connecting rod when the connecting rod needs to be installed at different heights, the workload of the workers is reduced, the connecting rod can be positioned under the cooperation of the sliding groove and the positioning block, the connecting rod is prevented from rotating in the moving process, and the working efficiency is improved. And through the cooperation of the fixed seat and the shielding mechanism, the situation that the bunches slide out from the upper part of the arc-shaped frame due to the angle problem of the arc-shaped frame can be prevented.
Owner:SHANDONG HUAYUE HUIYING MASCH EQUIP CO LTD

Transfusion speed controller

The invention relates to an infusion speed controller which comprises a shell, an infusion device, a clamping device and a power device. The infusion device comprises a disc base, a T-shaped liquid inlet pipe, a T-shaped liquid discharge pipe, a first arc-shaped sliding groove, a second arc-shaped sliding groove, a first through hole, a second through hole, a third through hole, a fourth through hole, a first arc-shaped sliding block and a second arc-shaped sliding block, wherein the first through hole and the second through hole are formed in the T-shaped liquid inlet pipe, the third through hole and the fourth through hole are formed in the T-shaped liquid discharge pipe, the first arc-shaped sliding block is arranged in the first arc-shaped sliding groove, and the second arc-shaped sliding block is arranged in the second arc-shaped sliding groove. The fifth through hole, the sixth through hole, the seventh through hole and the eighth through hole are formed in the disc base, the ninth through hole is formed in the first arc-shaped sliding block, the tenth through hole is formed in the second arc-shaped sliding block, and the insertion hole is formed in the push rod. The power device comprises a main shaft, a rotating disc, an inserting rod, a hollow hemisphere, a base, a first transmission shaft, a speed changing assembly, a T-shaped rotating plate, an arc-shaped limiting plate, an elastic rod, a plurality of limiting grooves formed in the hollow hemisphere and a plurality of open grooves.
Owner:ZHEJIANG PROVINCIAL PEOPLES HOSPITAL

Low-frequency sound source passive positioning method for deep-sea small-scale vertical array

The invention discloses a low-frequency sound source passive positioning method for a deep-sea small-scale vertical array, which belongs to the technical field of ocean engineering and comprises the following steps: S1, setting initial parameters; s2, combining the sound field generation signal with the isotropic noise; s3, positioning by using a sparse reconstruction matching field positioning method; s4, changing the number of array elements and the condition of array element spacing, and circulating S2 and S3 to obtain a root mean square error curve of distance and depth of the SR-MF method under different conditions; according to the method, the distance and depth information of the low-frequency passive sound source can be obtained under the deep sea condition through the SR-MF method, multi-path number and angle estimation is effectively avoided, a good positioning estimation result can be obtained under a small array scale, the influence of the sound field on the positioning performance of a large-scale array can be effectively avoided, and the positioning accuracy of the low-frequency passive sound source is improved. And moreover, the cost of the adopted array is lower, and the arrangement and the recovery are more convenient.
Owner:NORTHWESTERN POLYTECHNICAL UNIV