299results about How to "Reduce misalignment" patented technology

The invention discloses a cooperative surveying and mapping control method and system based on an unmanned ship and an unmanned aerial vehicle, relates to the technical field of automatic control, and realizes acquisition, processing and fusion of real-time high-precision three-dimensional image data during operation of the system. Multi-source data are synchronously acquired from an unmanned ship and an unmanned aerial vehicle by using LiDAR, sonar and camera sensors, the robustness of feature extraction is enhanced by denoising and calibration preprocessing, ensuring of data quality and application of an ORB algorithm in a feature point extraction module in combination with gradient directions and texture feature points, and an edge detection module identifies the edge in an image, so that the robustness of feature extraction is improved. And generating the boundary set B and marking the edge, thereby improving the accuracy of the edge information. And the feature point matching module performs feature point matching and data fusion by using an RANSAC algorithm to generate a fused image Ifuse, so that the phenomena of dislocation, incomplete fusion, overlapping and overlapping gaps at image joints are reduced as much as possible.

The invention belongs to the technical field of fiber size measurement, and particularly relates to a method for measuring the length of fibers in a fiber reinforced thermoplastic composite material. Mixing and diluting the fiber reinforced thermoplastic composite material and thermoplastic resin to obtain a diluted material, pressing the diluted material to obtain a test sample strip, cutting the test sample strip into a sample wafer, and measuring the length of the fiber in the sample wafer under an optical microscope; wherein the fiber reinforced thermoplastic composite material is prepared from matrix resin and reinforced fibers, and the matrix resin is the same as thermoplastic resin. According to the invention, the problems of poor measurement result accuracy and reproducibility and low measurement efficiency of the existing fiber length measurement method for the fiber reinforced thermoplastic composite material are solved.

The invention relates to the field of orthodontic instruments, and provides a wedge-shaped arch expander which comprises two base plates which are respectively attached to two sides of an upper jaw surface and are divided by a palate center seam, the two base plates are provided with hoops which are worn on teeth, an orthodontic seam is reserved between the two base plates, an orthodontic wedge block is embedded in the orthodontic seam, and the orthodontic wedge block is embedded in the orthodontic wedge block. The two sides of the correcting wedge block abut against the inner sides of the two base supports; the matched wedge-shaped expansion device is obtained through the design method, teeth are corrected through the wedge-shaped expansion device, and the wedge-shaped expansion device can avoid the problem of correction dislocation caused by uneven stress in the tooth correction process.

The invention relates to the technical field of screw welding machining, and discloses an automatic electric arc welding machine for countersunk head small self-tapping cement screw machining, which comprises an operation platform, a manipulator for taking a screw and a welding gun for welding the screw and a plate, and a shell is mounted on the upper side of the operation platform; a supporting frame body used for conveying screws is installed in the shell, first grooves used for containing the screws are symmetrically formed in the two sides of the supporting frame body, a movable frame used for advancing the screws is movably installed between the operation platforms, a driving motor used for driving the movable frame to move is installed on the side wall of the supporting frame body, and a supporting table is installed on the upper sides of the operation platforms. The side part of the supporting platform is provided with a detection head used for detecting whether a screw is not aligned. The upper side of the operation platform is provided with a conversion seat used for adjusting whether the screw is aligned. After the mechanical arm takes the screws to be in butt joint with the metal plate, the welding gun is used for welding the screws, automatic welding is achieved, the labor use cost is reduced, and the production efficiency and the welding quality are improved.

The invention relates to a laser wire powder coaxial combined machining head for multiple beams, and belongs to the technical field of laser additive equipment, the laser wire powder coaxial combined machining head comprises a wire feeding assembly and a plurality of coaxial powder feeding nozzles, the plurality of coaxial powder feeding nozzles are arranged around the central axis of a wire in the wire feeding assembly, the coaxial powder feeding nozzles are connected with a lens group module, and the lens group module is connected with an optical fiber plug. The laser passes through the lens group module and is coaxial with the central axis of the coaxial powder feeding nozzles, an annular powder feeding channel is arranged in the coaxial powder feeding nozzles around the central axis of the coaxial powder feeding nozzles, the coaxial powder feeding nozzles are provided with powder feeding holes communicated with the annular powder feeding channel, and the central axis of a wire in the wire feeding assembly and the central axis of each coaxial powder feeding nozzle intersect at the same point. The device has the advantages that when the silk powder is fed at the same time, the silk powder can evenly absorb energy of laser, the problem of different directions is solved, the material utilization rate and the additive quality are improved, meanwhile, equipment adjustment is simplified, and the working efficiency is improved.

The invention relates to the technical field of assembling tools, and discloses a push rod assembly assembling tool which comprises a tool containing base, a mounting groove is formed in the surface of the tool containing base and used for being clamped into a table, the tool adopts a three-in-one integrated design, a push rod assembly is divided into three parts of assembling procedures, the assembling procedures are completed on the same tool containing base in a centralized mode, and the assembling efficiency is improved. The first assembling part is arranged along the Y axis and can synchronously complete pretreatment assembling of multiple sets of guide rod assemblies, the second assembling part arranged along the X axis is matched with the extrusion assembly to achieve pressing-in operation of a plastic cover, the third assembling part is arranged along the Z axis, assembling of a gear and a cover body assembly in a push rod shell assembly is achieved, the transfer time between procedures is greatly shortened, and the connection cost is greatly reduced. And through integrated layout, precise positioning and convenient operation design, the production efficiency is remarkably improved, the product quality is effectively guaranteed, and the labor and equipment investment cost is reduced.

The invention relates to the technical field of sound insulation building structures, in particular to a modular building sound insulation structure which comprises base plates, a clamping mechanism, a connecting mechanism, a locking mechanism and a switching mechanism, the base plates are arranged in a staggered mode to shield gaps at the connecting positions, the connecting firmness is improved through multiple locking, and the number is set according to the specification requirement of a use site; sound insulation spaces of different sizes are defined, installation is easy and convenient, the base plates are suitable for various scenes, connection between the base plates is more stable and reliable through triple locking, meanwhile, locking is interlocked, the installation steps are simplified, buffer connection is provided, the dislocation amplitude caused by vibration is reduced, the connection strength and stability are improved, and the service life of the base plates is prolonged. The directions of the clamping blocks are adjusted according to the insertion directions of the extension rods on the base plates, the clamping state of the three clamping blocks to the locking columns is guaranteed all the time, the connection modes between the base plates are enriched, connection in different directions is carried out according to use scenes, the base plates are suitable for different use scenes, and compatibility is improved.

The utility model discloses an anti-shake law enforcement recorder, and belongs to the technical field of image processing equipment. An anti-shake law enforcement recorder comprises a shell and a camera, the camera is movably installed at the front end of the shell through an anti-shake compensation mechanism, the anti-shake compensation mechanism comprises a transverse displacement unit, and a longitudinal displacement unit is installed at the working end of the transverse displacement unit. The camera is mounted at the working end of the longitudinal displacement unit; the utility model has the advantages that the camera is prevented from shaking repeatedly, and ghosting and blurring of pictures are reduced.

The invention discloses a double-layer peep-proof film compounding machine which is characterized in that a film material feeding mechanism, a material receiving and releasing mechanism and a rolling and laminating mechanism are arranged on a machine table, and a film material feeding assembly of the film material feeding mechanism is arranged at the position close to the material receiving and releasing mechanism; the corresponding single-layer peep-proof films are fed to a vertical bearing film of a collecting and discharging conveying line of a collecting and discharging mechanism one by one through a film feeding assembly, so that release films of the single-layer peep-proof films are adhered to the vertical bearing film; two winding and unwinding conveying lines which are symmetrically arranged and are in butt joint with a rolling and laminating mechanism of a winding and unwinding mechanism are adopted to drive a vertical bearing film to transmit a plurality of single-layer peep-proof films which are sequentially arranged, and the single-layer peep-proof films are conveyed to a stripping device along a guiding and positioning assembly to be stripped from a release film; and the vertical bearing film is driven to drive the multiple release films stripped from the corresponding single-layer peep-proof films to be wound, and the two single-layer peep-proof films with the release films removed are aligned and twisted into a rolling and attaching mechanism through the rolling and attaching mechanism and are rolled and composited into the double-layer peep-proof film.

The invention belongs to the technical field of toy processing, and particularly relates to a rotating disc type toy assembling machine which comprises a machine table, a rotating disc is rotatably mounted on the upper side of the machine table, a driving motor used for driving the rotating disc to rotate is arranged in the machine table, a plurality of mounting grooves are formed in the rotating disc, and bearing tables are mounted in the mounting grooves; a plurality of vibration discharging discs are installed on the side wall of the machine table and connected with a discharging guide rail, and a feeding assembly is arranged between the discharging guide rail and the bearing table. By means of continuous rotation of the rotary disc, assembling of parts can be automatically completed in the rotating process, the assembling efficiency is greatly improved, manual assembling is not needed, the labor cost is reduced, and meanwhile the production efficiency is improved.

The invention relates to the technical field of costume design, and discloses a humpback person garment which comprises a jacket body, an insertion piece assembly and a wind blocking piece part. The coat body comprises a coat body front piece and a coat body rear piece, the length of the coat body rear piece is larger than that of the coat body front piece, and the back width of the coat body rear piece is larger than the front chest width of the coat body front piece. The insertion piece assembly comprises a front piece armhole armpit insertion piece, a rear piece armhole armpit insertion piece and a back wide upper side insertion piece, the front piece armhole armpit insertion piece is arranged at the front piece armhole armpit part, the rear piece armhole armpit insertion piece is arranged at the rear piece armhole armpit part, and the back wide upper side insertion piece is arranged at the back wide upper side part. The surface of the back wide upper side inserting piece is covered with the wind blocking piece part, the straight edge of the wind blocking piece part is connected to the neck line part of the clothes body rear piece, and the round edge of the wind blocking piece part extends towards the back wide lower side part of the clothes body rear piece and is connected with the back wide lower side part through at least three buttons in the extending longitudinal direction. The comfort degree, the fitting degree and the attractiveness are improved, and the wearing requirements of people with humpbacks of different degrees can be met.

The present application provides a test device for testing the impermeability of concrete, which relates to the technical field of testing the impermeability of concrete, including a test table detachably connected with an assembly barrel for carrying the test concrete, the assembly barrel having a first placement groove, the first placement groove being sleeved with a first sealing sleeve, the assembly barrel having a second placement groove at one end away from the first placement groove, the second placement groove being slidably connected with a plurality of locking baffles, the surface of the locking baffle being sleeved with a second sealing sleeve, the locking baffle moving toward the test concrete when the assembly barrel abuts, and pushing the second sealing sleeve. The present application can reduce the probability of the sealing sleeve sleeved on the concrete specimen being offset when testing the concrete specimen.

The invention discloses a robot motion control system and control method based on machine vision, relates to the technical field of machine vision, and provides effective data input for an error calculation and correction module by extracting a local feature point set Fp during operation of the system. And the error calculation and correction module calculates an image translation error Et and a rotation error Er based on the feature point set Fp, obtains a translation vector T and a rotation error R by correcting the image position, generates a complete panoramic image P, and provides reliable visual information support for subsequent target positioning and path planning. The motion control and target positioning module is combined with a panoramic image P and a positioning algorithm, so that the target positioning precision is improved, the path planning is optimized, the problems of image dislocation, positioning errors and path instability in a traditional method are solved, and the adaptive capacity and task execution efficiency of the robot in a dynamic environment are greatly improved.

The utility model relates to a neodymium-iron-boron magnet combination capable of being positioned and spliced, which belongs to the technical field of neodymium-iron-boron magnets and comprises a main magnet and a spliced magnet, the main magnet comprises a bottom and a cylindrical portion, a through hole matched with the cylindrical portion is formed in the middle of the spliced magnet, a butt joint groove is formed in the lower end of the spliced magnet, and the bottom of the spliced magnet is provided with a through hole matched with the cylindrical portion. A butt joint column matched with the butt joint groove is arranged at the upper end of the bottom. The method has the advantages of being not prone to dislocation in splicing and high in splicing precision.

The invention discloses a photovoltaic curtain wall convenient to install, and relates to the technical field of photovoltaic curtain walls, the photovoltaic curtain wall convenient to install comprises a supporting installation frame and an outer frame, a pulley plate and the outer frame are preliminarily positioned and fixed through vertical movement of a trapezoidal block, and the device provides an accurate reference path for movement of the outer frame and a photovoltaic panel through a first long plate and a second long plate; a worker only needs to push the outer frame along the first long plate and the second long plate until the outer frame cannot be continuously pushed, the problem of position deviation or asymmetry occurring in the process of manually positioning the fixing holes is solved, meanwhile, the first long plate and the second long plate provide a fixed track, it is ensured that the outer frame and the photovoltaic panel move in parallel in the preset direction during installation, and the installation efficiency is improved. The situation that an existing installation support does not have a positioning function, and consequently the installation deviation position of the photovoltaic curtain wall is prone to being inclined due to manual positioning is avoided, the trapezoidal block can be locked when the outer frame cannot be pushed, and the situation that the installation speed is low due to repeated adjustment is further reduced.

The invention relates to the field of semiconductor material molecular beam epitaxial growth manufacturing, and discloses a method for controlling As background pressure to reduce InAs / GaSb surface defects, which comprises the following steps: S1, substrate preparation and pretreatment: selecting a proper GaSb single crystal substrate, and carrying out selection, cleaning, degassing and deoxidation treatment on the GaSb substrate; s2, carrying out epitaxial growth of a GaSb buffer layer, and carrying out epitaxial growth of the GaSb buffer layer on the processed GaSb substrate; s3, control of As background pressure intensity: in the growth process of the GaSb buffer layer, the As background pressure intensity in the cavity is controlled and stabilized by adjusting the opening degree of an As needle valve; s4, growth of an InAs / GaSb superlattice: growing an InAs and GaSb superlattice structure layer by layer under the condition of well controlled As background pressure intensity. By accurately controlling the As background pressure intensity, the'bright spot 'defect and other surface defects formed on the InAs / GaSb surface can be effectively reduced, and the surface quality of the superlattice material is improved.

The invention discloses a pipeline welding device for building construction, and relates to the technical field of pipeline welding for building construction, the pipeline welding device for building construction comprises a lifting plate, a square block, a clamp, an elastic telescopic pressing block, an elastic telescopic column, a bottom plate, a flat plate, a vertical plate and a sliding frame, the lifting plate is fixedly mounted at the top of a working plate, and the square block is fixedly mounted at the top of the lifting plate; the clamp is rotationally installed on the face, away from the electric welding device, of the square block, a through groove is formed in the top of the lifting plate, the bottom plate is fixedly installed at the bottom of the through groove, and the fixed end of the elastic telescopic column is fixedly installed at the top of the bottom plate, so that a to-be-welded pipeline can be firmly fixed to a specific position; therefore, the position accuracy of a welding seam is ensured, the welding quality is improved, the aligning gap and the unfitness of butt joint of the pipeline can be accurately adjusted and kept, the pipeline meets the requirements of a welding process, and welding defects are reduced.

The present invention relates to the technical field of motor stator wire embedding machines, and discloses a motor stator horizontal wire embedding machine, comprising a wire embedding machine body, two clamping arms are arranged on the right side of the wire embedding machine body, a wire embedding module located between the two clamping arms is arranged on the right side of the wire embedding machine body, two support frames are arranged on the right side of the wire embedding machine body, the tops of the two support frames are both provided with slide rails, the bottoms of the wire embedding machine body and the support frames are both provided with support seats, and a support mechanism slidably connected to the slide rails is arranged between the tops of the two support frames. The motor stator horizontal wire embedding machine effectively facilitates users to place the motor stator and adjust the feeding, effectively reduces the labor intensity of operators, effectively helps users to effectively position and align the motor stator, effectively reduces the misalignment of the wire embedding head, ensures the wire embedding quality, and is convenient for users to use.

The utility model relates to the technical field of medical instruments, and discloses an optical fiber pressure sensor packaging structure and an intrusive miniature blood pump, the optical fiber pressure sensor packaging structure comprises a first metal section, a wire winding section and a second metal section, the first metal section, the wire winding section and the second metal section are communicated with one another and are sequentially connected to form a continuous metal packaging structure, the first metal section is of a hollow tubular structure, a probe of an optical fiber pressure sensor is arranged in the first metal section, and the first metal section is provided with a pressure sensing window; the wire winding section is used for winding and wrapping the periphery of part of the optical fiber section of the optical fiber pressure sensor, and the second metal section is of a hollow tubular structure and is used for internally arranging part of the optical fiber section, so that the optical fiber section and a probe in the optical fiber pressure sensor can be effectively protected, and laser welding is easier to realize by utilizing the metal sections on the two sides of the metal packaging structure. The purpose that the optical fiber pressure sensor is integrated on the miniature blood pump is achieved.

The embodiment of the invention discloses rubberizing equipment and a rubberizing method. The equipment comprises a rubberizing assembly and a control assembly, the rubberizing assembly comprises a first rubberizing mechanism and a second rubberizing mechanism, the control assembly is used for controlling the rubberizing assembly to move towards a to-be-rubberized part in the first direction, the first rubberizing mechanism is used for pasting a first part of an adhesive tape to an area, close to a second wall of the to-be-rubberized part, of a first wall of the to-be-rubberized part, and the second rubberizing mechanism is used for pasting a second part of the adhesive tape to a second wall of the to-be-rubberized part. The second adhesive tape pasting mechanism is used for pasting a second part of the adhesive tape to the area, close to the first wall, of the second wall, the first part is connected with the second part, and the first wall intersects with the second wall. According to the rubberizing equipment and the rubberizing method provided by the embodiment of the invention, the rubberizing efficiency can be improved.

The invention discloses a matching method and system based on a 5G network, Beidou positioning and non-line-of-sight microwave, and relates to the technical field of target signal positioning, and the matching method comprises the steps: building a static and dynamic combined calibration data set through obtaining high-precision geographic position information and real-time signal intensity data, and carrying out the calibration of the calibration data set; and adaptive direction adjustment and rapid focusing of the antenna are supported, and efficient communication and accurate positioning in a complex scene are realized. The calibration matching model is trained based on the calibration data set, so that the precision and adaptability of the model under multiple geographical environments and non-line-of-sight conditions are improved, an efficient antenna positioning mechanism is provided, and the stability and real-time performance of a communication link are guaranteed; the method is particularly suitable for complex environments such as disaster rescue, accident personnel can be quickly and accurately positioned, and rescue efficiency and action reliability are remarkably improved.

The invention belongs to the technical field of logistics automation, and particularly relates to a multifunctional transition transfer device. The device comprises a photoelectric sensor, a jacking assembly, a guide bearing, a synchronous belt conveyor, a material disc, a material blocking assembly and a conveyor support, the conveyor support serves as a device supporting body and is telescopic, the guide bearing is perpendicularly erected at the top end of the conveyor support, the synchronous belt conveyor is laid along the upper portion of the guide bearing, the material disc is placed on the synchronous belt conveyor, and the material blocking assembly is arranged on the material disc. The guide bearing provides a transition transfer path for the charging tray; the material blocking assemblies are located on the left side and the right side of the material disc, the photoelectric sensor is fixedly installed over the guide bearing through a support, the jacking assembly is arranged under the position corresponding to the photoelectric sensor, and the jacking assembly is located below the material disc. The device has the advantages of being reasonable in structure, easy and convenient to operate, high in automation degree, safe and reliable, the efficiency and accuracy of article transfer are improved, and meanwhile the safety of operators is guaranteed.

The utility model belongs to the technical field of electrochemical energy storage, and discloses a multi-tab winding type laminated cell structure, which is formed by winding a positive pole piece, a negative pole piece and a diaphragm, the positive pole piece and the negative pole piece are respectively provided with 2n tabs, and n is the number of turns of cell winding; two tabs exist when the positive pole piece and the negative pole piece are wound by one circle, and the two tabs of each circle of the positive pole piece and the negative pole piece are symmetrically distributed on the two sides of the roll core; all tabs after the positive pole piece is wound are arranged side by side to form a positive pole tab of the battery cell; and after the negative pole piece is wound, all tabs of the negative pole piece are arranged side by side to form a negative pole tab of the battery cell. According to the utility model, high-efficiency production can be realized in a winding manner, the battery has low battery core internal resistance comparable to that of a laminated battery, meanwhile, the dislocation of the tabs is relatively small, and the weight and the cost of the battery are reduced; therefore, the rate capability of the battery is improved, and meanwhile, the production efficiency and the yield are improved.

The invention relates to the technical field of metal 3D printing, and discloses an adjustable powder laying structure and a 3D printing method in order to solve the technical problems that according to conventional 3D printing equipment, scraper replacement operation is complex, box opening operation is needed, consumed time is long, and a forming cabin needs to be inflated again. The outer side of the fixing support is connected with a pressing roller mechanism through a driving system, and a scraper system is arranged on the inner side of the fixing support. The fixing support comprises a top transverse plate and a lateral vertical plate, and a lifting groove is formed in the inner side of the lateral vertical plate and used for vertical displacement of the scraper system along the lifting groove. The scraper system comprises a pair of main rotating discs, a main shaft is fixedly connected to the centers of the inner sides of the main rotating discs, a plurality of scrapers arranged in a circumferential array are arranged between the main rotating discs, and first fixing pins used for axially positioning the scrapers are arranged on the main rotating discs. And due to the design of the main rotating disc and the scrapers arranged in the circumferential array, the scrapers can be rapidly replaced, and the technical problem that box opening and re-inflation are needed for replacing the scrapers is solved.

The utility model relates to a kind of prepreg laying-up auxiliary devices, including material bearing assembly;The material bearing assembly includes cavity, the corner of the cavity is equipped with avoidance groove, the depth of the avoidance groove is same with the depth of the cavity;The inner wall of the cavity is equipped with at least one material taking groove and multiple limit grooves along its long side extension direction, the depth of the material taking groove is greater than the depth of the cavity;Multiple limit grooves are symmetrically set on the inner wall of the two sides of the cavity;The upper surface of the cavity is equipped with angle mark, and the angle mark includes at least one scale line for indicating the laying direction of prepreg.The prepreg laying-up auxiliary device of the application reduces the problems such as difficult to enter the mold and misplacement caused by size problem by controlling the size of laying-up blank;In addition, by matching the material cutting size with the cavity, the splicing gap or uneven lap phenomenon caused by artificial splicing is reduced, which is beneficial to size positioning when splicing prepreg.

The utility model discloses a flatbed trailer convenient to butt joint installation, including device body, be equipped with the supporting plate in the device body, the supporting plate front end is connected supporting plate frame and is equipped with the protection frame on the supporting plate, be equipped with the mounting buckle and the connector on the supporting plate frame, be equipped with the lifting rod in the mounting buckle, the lifting rod below is connected the pressing plate, be equipped with the fixed base on the connector, be equipped with the support plate on the fixed base and open the screw hole in the fixed base, be equipped with the clamping plate on the support plate, screw the thread rod in the screw hole, the thread rod one end is connected the ring, open the clamping slot in the protection frame, insert the baffle in the clamping slot, be equipped with the connecting hole in the baffle, be equipped with the locking rod in the connecting hole, be equipped with the clamping rod in the locking rod, the mobile wheel is installed below the supporting plate, can guarantee that flatbed trailer and traction equipment, flatbed trailer each component connection is stable, guarantees in transportation not easy to loosen, reduces the potential safety hazard, promotes transportation security.

The embodiment of the utility model belongs to the technology of laser projection equipment, and provides laser projection equipment, which comprises a laser light source, a light beam adjusting assembly and a projection lens, and is characterized in that the light beam adjusting assembly comprises a first light beam adjusting part and a second light beam adjusting part; the first light beam adjusting component is located on the light emitting side of the laser light source and used for emitting a first part of incident light in the first polarization direction and emitting a second part of the incident light to the second light beam adjusting component. The second light beam adjusting component is used for reflecting the second part to the first light beam adjusting component and enabling the second part to be emitted in a second polarization direction; the light beam adjusting assembly is configured to emit the first part in a first polarization direction and emit the second part in a second polarization direction, so that the first part and the second part with different polarization directions are emitted to the projection lens. Therefore, by repeatedly using the first light beam component, the light path design can be simplified, the size of the laser projection equipment can be reduced, and the miniaturization of the laser projection equipment can be conveniently realized.

The application provides a tunnel assembly type groove structure and a fastening method thereof. The groove structure comprises a groove one and a groove two. The groove one is provided with an L-shaped slot on one side top and a side wall to be cast in situ after the precast groove is installed. A middle partition wall is located between the groove one and the groove two, and the groove one and the groove two share the middle partition wall. The bottom plate of the groove structure is provided with a horizontal third trapezoidal slot in the width direction at both ends. The middle partition wall is provided with a first trapezoidal slot in the vertical direction at both ends. The side wall of the groove two is provided with a second trapezoidal slot in the vertical direction at both ends. The wall body of the middle partition wall is provided with a concrete rib, and the concrete rib is provided with a channel steel hole. The groove structure is provided with a pulling hole on the middle partition wall. The bottom plate of the groove structure, the groove two and the middle partition wall form a stop word shape structure. The application has the advantages of simple structure, easy implementation, improved standardization level of the tunnel precast installation groove, and reduced misalignment problem between adjacent precast components.

The utility model discloses a positioning device of a geological engineering surveying and mapping instrument, which comprises a base, a leveling seat is arranged above the base, and leveling screws are arranged between the periphery of the leveling seat and the base. The leveling screw penetrates through the surface of the leveling seat, an adjusting nut is arranged on a rod body, located between the leveling seat and the base, of the leveling screw, a positioning plate is arranged in the middle area of the leveling seat, and mounting plates with symmetrical structures are arranged on the two sides of the leveling seat. A universal gradienter is arranged on the surface of the mounting plate on one side, and a compass is embedded in the surface of the mounting plate on the other side. The positioning device is mainly used for adjusting the centering deviation of the prism base of the surveying and mapping instrument, the adjusting and positioning efficiency can be improved, the centering deviation is reduced, and the truth and reliability of subsequent surveying and mapping data are guaranteed.

The utility model relates to the technical field of temperature measurement, and discloses a mounting bracket for a temperature measurement sensor, which comprises a bracket body which is constructed to be of a longitudinally extending batten-shaped structure and is provided with a plurality of through holes at intervals along the longitudinal direction, and heat exchange tubes penetrate through the through holes and are fixed through the through holes; the first limiting separation blade is arranged at the longitudinal first end part of the frame body and is used for limiting and fixing the pipe end of the temperature sensing pipe; the second limiting blocking piece is arranged at the position, away from the first blocking piece and located on the side of the penetrating hole, of the frame body and used for enabling the temperature sensing pipe to be attached to the heat exchange pipe in the penetrating hole. According to the mounting bracket, the moving range of the temperature sensing tube can be limited, and the temperature sensing tube can be tightly attached to the heat exchange tube, so that the dislocation problem caused by factors such as vibration can be effectively reduced, the attaching tightness of the temperature sensing tube and the heat exchange tube is improved, and the temperature measurement accuracy of the temperature measurement sensor is guaranteed. The utility model further discloses the refrigeration equipment.