472 results about "Survey instrument" patented technology

The invention relates to a positioning device for urban planning topographic survey, and relates to the technical field of topographic survey equipment, the positioning device comprises a mounting body, a mounting plate, a mounting assembly, a leveling assembly and a locking assembly; a supporting telescopic rod and a metering telescopic rod are arranged at the bottom of the mounting body; the number of the supporting telescopic rods is at least three, and the fixed ends of the supporting telescopic rods are hinged to the installation body. The fixed end of the metering telescopic rod is fixedly connected with the mounting body; the surveying instrument is rotationally arranged on the mounting plate; the mounting assembly is arranged on the mounting body and is used for mounting the mounting plate on the mounting body; the leveling assembly is arranged on the mounting body and is used for enabling the surveying instrument to keep a horizontal state in a self-adaptive manner; the locking assembly is arranged on the surveying instrument and used for locking the surveying instrument after the surveying instrument is in the horizontal state. According to the invention, landform survey can be conveniently carried out on a city.

A method for surveying an environment by a movable surveying instrument with a progressional capturing of 2D-images by at least one camera and applying a visual simultaneous location and mapping algorithm (VSLAM) or a visual inertial simultaneous location and mapping algorithm (VISLAM) with a progressional deriving of a sparse evolving point cloud of at least part of the environment, and a progressional deriving of a trajectory of movement. The method comprises a progressional matching of the sparse evolving point cloud with a previously derived 3D-geometry, with a minimizing of a function configured to model a distance between the sparse point cloud and the previously derived 3D-geometry and deriving a spatial localization and orientation of the surveying instrument. At least one surveying measurement value of the environment by a spatial measurement unit is combined with the sparse point cloud or the previously derived 3D-geometry.

The invention discloses a portable surveying and mapping device for forest resource investigation. The portable surveying and mapping device comprises a storage box, a surveying and mapping instrument and a bracket, a surveying instrument storage cavity and a bracket storage cavity are sequentially formed in the storage box from top to bottom; the upper portion of the surveying instrument storage cavity is of an opening structure, a lifting table and a lifting driving mechanism used for driving the lifting table to do linear motion are arranged in the surveying instrument storage cavity in a sliding mode in the vertical direction, and the surveying instrument is fixedly arranged on the upper portion of the lifting table; the support comprises a mounting plate, a supporting assembly is arranged on one side of the mounting plate, and a connecting assembly is arranged on the other side of the mounting plate. The device is very convenient to assemble and disassemble, can be quickly unfolded and stored during field operation in a forest area, and effectively improves the surveying and mapping operation efficiency during forest resource investigation.

The invention relates to the technical field of geological surveying and mapping, and discloses urban three-dimensional geological surveying and mapping equipment which comprises a placement table, three supporting legs are rotatably connected to the inner wall of the placement table, air pressure sleeves are arranged at the bottoms of the three supporting legs, and fixing rings are fixedly connected to the inner walls of the air pressure sleeves. An operator supports the surveying instrument through the supporting assembly, then rotates the air pressure sleeve to enable the air pressure sleeve to be perpendicular to the ground, finally places the extrusion assembly to descend, enables the piston rod to make contact with the ground, enables the piston rod to extrude air in the air pressure sleeve and enables the air pressure to be increased, and generated ground vibration can be transmitted to the piston rod when the surveying instrument conducts surveying around a large number of vehicles. Kinetic energy is absorbed and vibration is relieved through compressibility of high-pressure gas at the top of the piston rod, so that vibration borne by the surveying instrument is reduced, and frequent vibration of the surveying instrument and influence on surveying and mapping accuracy when the surveying instrument is used for surveying and mapping in an area with many running vehicles are effectively prevented.

The utility model belongs to the technical field of surveying and mapping devices, and particularly relates to a surveying and mapping device convenient to adjust surveying and mapping height, which comprises a supporting seat, a placing disc, a rotating platform and a surveying instrument, and an adjusting device is arranged at the top of the supporting seat. According to the surveying and mapping device convenient to adjust the surveying and mapping height, by arranging the first height adjusting unit, when the height of a surveying instrument needs to be adjusted in the surveying and mapping process, a motor is started to drive a threaded rod to rotate, and under threaded connection of the threaded rod and a connecting sleeve, the connecting sleeve drives a placement disc to move up and down along a limiting rod through a fixing frame; the height of the surveying instrument is adjusted without adjusting the heights of the outer rod and the inner rod, so that the supporting seat is always in a horizontal state, the supporting seat does not need to be leveled again, the use is convenient, and the problems that in the prior art, when the observation height needs to be changed temporarily in the observation process, the leveled objective table deviates, leveling needs to be carried out again, and the working efficiency is high are solved. And the surveying and mapping efficiency is influenced.

The invention relates to the technical field of surveying and mapping equipment, and discloses a surveying and mapping instrument with soft and hard ground switching dual-mode supporting legs, the surveying and mapping instrument comprises a debugging platform and a surveying and mapping instrument body, and a multi-stage horizontal adjusting assembly for rapidly adjusting and leveling the surveying and mapping instrument body is arranged between the debugging platform and the surveying and mapping instrument body. The bottom of the debugging platform is provided with at least three sets of supporting leg assemblies, and the bottoms of the supporting leg assemblies are detachably provided with switching discs through separation assemblies. The first soft ground supporting assembly and the second soft ground supporting assembly are adopted to be used according to different soft ground conditions, short-term effective supporting of the tripod is achieved, rapid installation of the switching disc and positioning of the hard ground supporting assembly, the first soft ground supporting assembly and the second soft ground supporting assembly are achieved through the separation assembly, and therefore the switching disc can be conveniently and rapidly installed. And for different use environments, adjustment is carried out when the switching disc is installed, and the operation is simple and convenient.

The invention discloses a protection device of a surveying instrument and a use method, and relates to the technical field of surveying instruments. According to the technical scheme, the surveying and mapping instrument comprises a surveying and mapping instrument body and a supporting base, the surveying and mapping instrument body is detachably connected to the supporting base, the joint of the surveying and mapping instrument body and the supporting base is detachably connected with a protection assembly through a hoop, and the protection assembly comprises a wrapping part, a shielding part and a plurality of air pumps communicating the wrapping part with the shielding part; the wrapping part and the shielding part are alternately used, the wrapping part and the shielding part are both arranged to be deformable air bags, the wrapping part and the shielding part are filled with inert gas, the protection air bags are arranged to protect the surveying and mapping instrument, the heat exchange speed of the protection air bags is low, and the influence of temperature changes on the surveying and mapping instrument can be better reduced; the service life of the surveying instrument is prolonged.

The utility model discloses a geographic information acquisition surveying and mapping device convenient to move, and relates to the technical field of geographic information acquisition equipment, the geographic information acquisition surveying and mapping device comprises a surveying and mapping mechanism, the surveying and mapping mechanism comprises an assembling plate, a surveying and mapping instrument and three rotating plates, when the device needs to be carried and transported, an operator accommodates a supporting plate in a fixing plate, and the supporting plate is fixed on the supporting plate; the fixing plate is rotated to be attached to the outer side of the supporting frame, the inserting blocks are fixedly inserted into the inserting holes, the connecting plate is pulled downwards, and the connecting plate and the bottom plate are fixed through the assembling bolts, so that the surveying and mapping mechanism is rapidly stored, real use and storage integration is achieved, the surveying and mapping mechanism is convenient to carry and carry, meanwhile, the surveying and mapping mechanism is convenient to move through the moving wheels, and the practicability is high. Meanwhile, when a fixing plate rotates towards the inner side, the fixing plate drives a first gear to rotate, so that a second gear and protection plates rotate upwards, and the three protection plates can automatically rotate upwards to be close to each other, so that the surveying instrument is protected, and the surveying instrument is prevented from being collided and damaged in the moving process of the surveying device.

The utility model discloses a novel water surveying and mapping device, which relates to the field of water surveying and mapping and comprises a ship body, a lifting device is mounted at the top of the ship body, and a surveying and mapping instrument is connected to the top of the lifting device. According to the novel overwater surveying and mapping device, the influence of water surface fluctuation on the surveying and mapping instrument can be reduced through counter-acting force generated by extruding a first spring through a first sliding block, so that the surveying and mapping instrument can be protected by the device, and meanwhile, the stability of overwater surveying and mapping can be improved; a cleaning brush is driven by a rotating block to rotate to the side face of a surveying instrument lens, stains on the surface of the surveying instrument lens are cleaned through an impeller under the action of wind power, the influence of the stains on measurement is prevented, the measurement accuracy is improved, a second spring can push a telescopic block to move while the surveying instrument is cleaned, and the measurement precision is improved. Therefore, the cleaning eraser is driven to be tightly attached to the lens of the surveying instrument, and the cleaning efficiency of the surveying instrument can be improved during attaching.

The utility model relates to the technical field of surveying instrument supports, and discloses a support for surveying of a woodland surveying instrument, which comprises a chassis and the surveying instrument, a fixed column is fixedly mounted at the top of the chassis, a universal ball is arranged in the fixed column, a pop-up mechanism is arranged at the top of the universal ball, a supporting mechanism is arranged outside the chassis, and the supporting mechanism is arranged on the chassis. According to the surveying instrument storage box, the surveying instrument is stored in the storage box through the arranged pop-up mechanism, the surveying instrument is protected and cannot be collided in the transportation process, when the surveying instrument needs to be used, the mounting plate drives the surveying instrument to pop up automatically through the pop-up assembly, and the problem that the surveying instrument needs to be mounted before being used every time and is tedious is solved; the extension rod can be stretched outwards according to different terrains to adjust the length of the extension rod, the spring B drives the insertion column to be inserted into the extension rod, adjustment of the extension rod is completed, and the surveying instrument can be conveniently placed for measurement when the surveying instrument is used and faces different terrains.

The utility model relates to the field of engineering surveying and mapping, and discloses a surveying instrument for engineering surveying and mapping, which comprises a surveying instrument main body, a supporting table, a limiting plate and supporting table legs, the supporting table is arranged at the bottom of the surveying instrument main body, the limiting plate is arranged on the side surface of the supporting table, and one end of the limiting plate is movably connected with the supporting table legs. The bottom of the surveying instrument main body is provided with a moving device for transversely moving the surveying instrument main body; the surveying and mapping instrument is compact and reasonable in structural design, the problems that a datum point on the ground needs to be found through laser before measurement of an existing surveying and mapping instrument, the erected surveying and mapping instrument needs to be moved to find the datum point, and operation is very troublesome are solved, and the surveying and mapping instrument is high in practicability. And the surveying and mapping efficiency is greatly improved.

The invention relates to the technical field of surveying and mapping instruments, in particular to a surveying and mapping instrument positioning device for engineering surveying and mapping. A fixed base; a positioning bracket; the plurality of pressure sensors monitor pressure data on the mounting platform in real time; the gravity center adjusting mechanism comprises a controller, a balancing weight and a chain mechanism, and the balancing weight balances and stabilizes the actual gravity center position; the chain mechanism comprises at least three length-adjustable chains and at least three length adjusters and is used for adjusting the position and height of the balancing weight; the controller determines the actual center-of-gravity position of the surveying instrument positioning device according to the pressure data, determines a first center-of-gravity model according to the actual center-of-gravity position and the chain length data in the multiple operation processes, and determines the adjustment mode of the actual center-of-gravity position according to the actual center-of-gravity position, the preset center-of-gravity position and the first center-of-gravity model. The gravity center of the surveying instrument positioning device is effectively adjusted.

The invention belongs to the technical field of surveying instruments, particularly relates to a surveying instrument based on a satellite positioning system and an image surveying system thereof, and aims to solve the problems of tedious operation, insufficient precision and poor adaptability of manual leveling in the background technology. An upper butt joint piece is connected to the inner wall of the lower butt joint piece in a threaded mode, a universal adjusting assembly is arranged between the lower butt joint piece and the frame body, and the universal adjusting assembly comprises a bottom column fixedly connected to the center of the inner wall of the bottom of the frame body. The inclination angle of equipment is monitored in real time through the inclination angle sensor, a leveling instruction is generated in combination with a control panel algorithm, and the servo motor can be driven to drive the leveling assembly to dynamically adjust the level of the chassis, so that automatic leveling of the surveying instrument main body is realized, manual intervention is not needed, the surveying instrument has the characteristic of automatic operation, the operation difficulty is reduced, and the working efficiency is improved. And the operation efficiency is greatly improved.

The invention relates to the technical field of planning surveying and mapping, in particular to a land resource surveying and mapping device which comprises a bottom plate, a base, a rotating shaft, a rotating block, a bearing plate, a leveling assembly, a clamping assembly, a surveying instrument, a cleaning mechanism and three supporting assemblies. One end of the rotating shaft extends to the outside of the base, the rotating block is installed on the rotating shaft, the bearing plate is horizontally arranged on the top of the rotating block, the leveling assembly is installed on the top of the base, the clamping assembly is installed on the top of the bearing plate, and the surveying instrument is clamped and fixed by the clamping assembly. The cleaning mechanism is installed on the bearing plate, the three supporting assemblies are arranged at the bottom of the bottom plate at equal intervals around the circle center of the bottom plate, the cleaning mechanism works regularly to automatically clean dust attached to the surface of a surveying and mapping instrument, then the situation that the dust influences the accuracy of the surveying and mapping instrument is avoided, and the surveying and mapping quality cannot be influenced.

This invention provides an intelligent pipeline inspection and testing system, comprising a wirelessly connected surveying instrument and a mapping terminal. The surveying instrument includes a laser ranging module, an attitude sensor module, a GPS positioning module, and a processor. The output of the laser ranging module is connected to the first input of the processor to send the measured distance signal to the processor. The output of the attitude sensor module is connected to the second input of the processor to send the measured pitch angle signal and horizontal azimuth angle signal to the processor. The output of the GPS positioning module is connected to the third input of the processor to send the longitude, latitude, and altitude coordinates of the surveying instrument's location to the processor. This invention obtains the three-dimensional coordinates of the pipeline components (longitude, latitude, and altitude) through the GPS positioning module, and combines this with the infrared ranging function of the surveying instrument to obtain the vertical distance of the pipeline from the installation ground, thus achieving clear differentiation of different levels of pipelines in a three-dimensional intersecting pipeline system.

The utility model belongs to the technical field of engineering surveying and mapping, and particularly relates to a horizontal adjusting structure of an engineering surveying and mapping instrument support, which comprises a bearing seat, a connecting disc I is vertically connected right above the bearing seat in a sliding manner, a mounting seat for mounting a surveying and mapping instrument is arranged right above the connecting disc I, and an adjusting mechanism is arranged between the mounting seat and the connecting disc I; according to the surveying instrument, the adjusting mechanism is arranged, the movable ball moves in the movable sleeve, the position of the mounting base can be adjusted conveniently, the adjusting rod swings on the connecting frame and supports and positions the mounting base, the mounting position of the surveying instrument can be horizontally adjusted, the horizontal position of the surveying instrument can be rapidly and greatly adjusted, and the surveying instrument is convenient to use. According to the surveying and mapping instrument, measurement errors caused by improper horizontal positions are reduced, meanwhile, after stable supporting, the vertical height of the surveying and mapping instrument can be adjusted, the requirement for high-precision measurement in the field of engineering surveying and mapping can be met, and the efficiency and accuracy of surveying and mapping work are improved.

The present invention discloses a surveying control pile, which belongs to the field of engineering surveying technology. The pile comprises a No. 2 barrel, wherein the upper sides of both ends of the No. 2 barrel are provided with exhaust holes, the lower end of the No. 2 barrel is provided with a cutting blade, the upper end of the No. 2 barrel is provided with a connecting plate, and the upper end of the connecting plate is provided with a No. 1 barrel. The present invention arranges a clamping assembly. When measuring work is required, a surveying instrument is placed on a mounting plate, and a double-axis screw is rotated by turning a handle. The rotation of the double-axis screw drives two slides to approach each other in a rectangular groove at the upper end of the mounting plate. At the same time, the two slides drive two clamps to approach each other. The two clamps approach each other to clamp and fix the surveying instrument on the mounting plate. At the same time, a rubber pad is provided at one end of the clamp to play an anti-slip role, thereby improving the clamping effect of the clamp and preventing the clamp from causing damage to the surface of the surveying instrument. The clamping assembly is provided to facilitate fixing the surveying instrument on the mounting plate, and the installation is more secure.

This invention discloses an automatic leveling geographic surveying instrument, belonging to the field of geographic surveying technology. The invention first acquires the tilt angle and tilt angle change rate of the total station base in real time, dividing station settlement into three stages: micro-settlement, significant settlement, and sudden settlement. For the micro-settlement stage, real-time error compensation is achieved through elevation correction of the line-of-sight height-time fitting curve and vertical axis tilt horizontal angle correction. For the significant settlement stage, high-precision automatic leveling based on a kinematic model, physical compensation for the three-dimensional displacement of the instrument center, and orientation reset are executed sequentially. For the sudden settlement stage, shutdown alarm and abnormal data marking are implemented. This invention also includes surveying instrument hardware with electrically telescopic outriggers and a multi-sensor system, adaptable to surveying operations in complex geological conditions, balancing measurement accuracy, operational continuity, equipment safety, and data utilization.

A method for aligning two surveying instruments in a common space in a process that uses an autocollimation of a collimated light beam transmitted by a first surveying instrument and reflected by a second surveying instrument. In the alignment process, the first surveying instrument may emit a collimated light beam towards the second the surveying instrument and receive a reflection of the collimated light beam from the second surveying instrument in an autocollimator. The reflection may be generated for example by a mirror at the second surveying instrument. When the light beam is reflected such that autocollimation of the collimated light beam is achieved at the first surveying instrument, the first and second surveying instruments are in a predetermined positional relation with respect to one another. With a known predetermined positional relation between the reflecting mirror and the line of sight of the second surveying instrument, measurements by both surveying instruments can be made in a common coordinate system.

The invention relates to the field of surveying and mapping instruments, in particular to a surveying and mapping instrument for land surveying and mapping, which comprises a base and a surveying and mapping lens arranged on the base, a fixing plate is mounted on the base; an organ type air bag is mounted on the fixing plate; a trigger assembly is arranged on the base, a cleaning assembly is arranged on the surveying and mapping lens, a lens of the surveying and mapping lens is wiped and cleaned through the cleaning assembly, and the organ type air bag is extruded through the trigger assembly to spray air to the lens of the surveying and mapping lens. The dedusting assembly is matched with the cleaning assembly to dedust the lens of the surveying and mapping lens; the sweeping plate drives the second air pipe to swing together, the sweeping action of the sweeping plate is matched with the blowing action of the second air pipe to effectively remove dust from the lens of the surveying and mapping lens, and the dust removal effect is improved.

The application discloses a portable surveying instrument positioning device for complex terrain surveying, and belongs to the field of surveying. The portable surveying instrument positioning device comprises a surveying instrument body, a mounting seat configured to have a mounting surface for mounting the surveying instrument body, three supporting members arranged at the bottom of the mounting seat, an adjusting mechanism arranged at the bottom of the mounting seat, and a moving member arranged at the bottom of the supporting member. The adjusting mechanism comprises an angle adjusting assembly arranged at the bottom of the mounting seat and used for adjusting the angle between the length direction of the supporting member and the surface of the mounting seat, and a length adjusting assembly arranged in the supporting member and used for adjusting the length of the supporting member. The portable surveying instrument positioning device for complex terrain surveying can automatically adjust the supporting position.

1. The name of this design product: Multifunctional shedding intelligent survey instrument. 2. Purpose of this design product: criminal investigation. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: Stereoscopic drawing 1.

The utility model belongs to the technical field of surveying and mapping equipment, and discloses surveying and mapping equipment facilitating surveying and mapping height adjustment, which comprises a connecting table, a plurality of supporting legs are rotatably matched with the lower side of the connecting table, adjusting mechanisms are arranged on the supporting legs, a surveying instrument is fixedly connected to the upper side of the connecting table, and a protection box is fixedly connected to one side of the connecting table. A protection plate matched with the surveying instrument is arranged on the inner wall of the protection box in a sliding fit mode. In the application, through the combined action of the protection plate and the reset assembly, the trigger mechanism and the locking mechanism which are matched with the protection plate, when the equipment accidentally topples over, the trigger plate is subjected to impact force, so that the locking block can be separated from the locking groove, and then the protection plate is pulled by the tension spring to protect the glass end of the surveying instrument; in this way, damage to the surveying instrument caused by accidents can be reduced, the influence of external factors on the surveying instrument is reduced, the service life of the surveying instrument can be prolonged, and economic losses caused by instrument damage are reduced.

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 discloses a storage tool box for geographic investigation, and belongs to the technical field of tool boxes for geographic investigation. Comprising a protective shell, a surveying instrument body arranged in the protective shell, a bearing plate slidably mounted in the protective shell and used for bearing the surveying instrument body, and a protective assembly arranged in the protective shell and used for protecting the surveying instrument body, the driving assembly is arranged in the protective shell and used for lifting the surveying instrument body, the reset assembly is arranged in the protective shell and used for resetting the surveying instrument body, and the protective assembly comprises a protective shell installed in the protective shell in a sliding mode and a top cover arranged at the top of the protective shell and used for sealing and covering an opening of the protective shell; through cooperative use of the devices, the surveying instrument body is protected by the protective shell, the protective shell and the top cover when being stored in the protective shell, and the probability that the surveying instrument body is collided is further reduced.

The utility model relates to the technical field of surveying and mapping, and aims to provide a surveying and mapping instrument positioning device for surveying and mapping, which comprises an adjusting groove, an adjusting component is arranged in the adjusting groove, a bearing component is arranged on the adjusting component, a connecting component is arranged on the bearing component, and a positioning component is arranged in the connecting component. A limiting assembly is arranged on the adjusting assembly, a plurality of evenly-arranged supporting assemblies are arranged on the outer wall of the adjusting groove, through the adjusting assembly, rapid and accurate adjustment of the surveying instrument in multiple dimensions is achieved, the operation process is greatly simplified, and the working efficiency is improved. Meanwhile, due to the introduction of the positioning assembly, the surveying instrument can still keep stable and accurate positioning in a complex environment, and surveying and mapping errors caused by positioning deviation are effectively avoided.

The utility model relates to the technical field of surveying instruments, in particular to a portable geographic information surveying instrument which is safer and more convenient to carry during carrying and transportation and comprises a surveying instrument body and a supporting device installed at the bottom of the surveying instrument body, a spine part is arranged at the bottom of the supporting device, and a protective shell used for protecting the spine part is movably installed on the supporting device. A positioning assembly is arranged on the supporting device, a positioning groove matched with the positioning assembly is formed in the protective shell, the positioning assembly and the positioning groove are matched to limit the position of the protective shell, the protective shell and the supporting device are in sliding connection, a connecting shaft is arranged on the supporting device, and a sliding groove matched with the connecting shaft is formed in the protective shell. An anti-falling cap is arranged at the end of the connecting shaft, the diameter of the anti-falling cap is larger than the width of the sliding groove, the protective shell and the supporting device are rotationally connected, a pivot is arranged on the supporting device, a connecting hole matched with the pivot is formed in the protective shell, and a rotating groove is formed in the protective shell.

The utility model discloses an auxiliary device for surveying and mapping of a power station, which comprises a fixed plate, a side hinge fixedly connected to the right side wall of the fixed plate, a protective cover arranged above the fixed plate, a surveying and mapping instrument fixedly connected to the top of the fixed plate, a bottom hinge fixedly connected to the bottom of the fixed plate, and a top hinge fixedly connected to the bottom of the fixed plate. The bottom of the fixing plate is rotationally connected with a rotating shaft, the circumferential face of the rotating shaft is fixedly connected with a stop block, and a supporting assembly is arranged at the bottom of the fixing plate. By arranging the fixing plate, the side hinge, the protective cover, the surveying instrument, the bottom hinge, the rotating shaft, the check block and the display board, when surveying and mapping are carried out, the display board can be unfolded, the rotating shaft is rotated, and the check block supports and fixes the display board, so that an operator can conveniently observe and directly record on the display board at the same time; the protective cover can be used for placing drawing articles, prevents the drawing articles from being lost, is simple in structure and convenient to operate, and improves surveying and mapping recording efficiency.