36 results about "Random rotation" patented technology

The invention discloses an occlusion state 3D human body posture estimation method based on multistage optimization. According to the method, a plurality of synchronously calibrated cameras are used for acquiring RGB images, and a plurality of data enhancement strategies including random rotation, horizontal overturning, geometric shielding, object shielding and the like are introduced, so that the robustness of a 2D joint point detection network under complex visual angle and shielding conditions is improved. And then an initial three-dimensional human body posture is preliminarily estimated by using a voxel space back projection method through the detected multi-view 2D heat map. For the occlusion problem, a visibility evaluation model fusing autologous occlusion and visual angle occlusion is constructed, and robust and stable human body three-dimensional attitude estimation can still be realized under the severe occlusion condition by introducing multiple constraints such as visual consistency, time sequence continuity, attitude priori and skeleton consistency to optimize and predict a 3D attitude in a multi-stage manner. According to the method, high-precision and shielding-robust 3D joint point detection can be realized only by inputting a multi-view-angle RGB image during operation, and the method is suitable for a real scene with a complex shielding condition.

The invention discloses a true triaxial test device and test method capable of realizing arbitrary rotation of principal stress, and belongs to the technical field of geotechnical engineering.The true triaxial test device comprises a shear stress device, the shear stress device comprises a shear stress pressure head used for being connected with the surface of a sample, and the shear stress pressure head is connected with two shear stress applying systems; the shear stress applying system applies shear stress parallel to the surface of the sample to the sample, and the directions of the two shear stresses are vertical; the main stress device is connected with the shear stress pressure head, and the main stress device applies pressure perpendicular to the surface of the sample to the sample. According to the invention, random rotation of the principal stress can be realized through the shear stress device, so that the direction and size of the principal stress applied to the rock sample can simulate a real path to continuously change, and the deformation fracture behavior in the rock mechanical bearing process can be more accurately obtained; and a technical support is provided for correctly and accurately evaluating the bearing characteristic, the fracture characteristic and the instability mechanism of the rock.

The invention discloses a speed reducer shell strength detection device, and relates to the technical field of speed reducer shell detection, the speed reducer shell strength detection device comprises a storage table and a shell body placed on the upper surface of the storage table, two sides of the shell body are provided with two symmetrically distributed hard frames, and the two hard frames are filled with a plurality of steel balls. The steel balls can be attached to the concave-convex surface of the outer wall of the outer shell to move in a self-adaptive manner, so that the outer shell is comprehensively and uniformly extruded; a movable plate and a positioning plate are sequentially stacked on the outer side of the hard frame, a plurality of connecting mechanisms used for connecting the hard frame are arranged on the two sides of the back face of the movable plate, the movable plate can apply disturbance to the steel balls, the steel balls are attached to the concave-convex face of the outer shell in a self-adaptive mode for displacement, and comprehensive and accurate positioning of the outer shell is achieved. An irregular arc-shaped sliding groove is matched to drive the rotating disc to rotate randomly, distribution of steel balls is disturbed, local random pressurization is started while pressure is evenly distributed, complex working conditions are accurately simulated, and test comprehensiveness and authenticity are improved.

An automated coffee grounds homogenizer is disclosed. The homogenizing tool comprises a body having a central axis, a plurality of stirs extending away from the body, and a gear means for randomly rotating the plurality of stirs about the central axis of the body. The gear means has differently sized gears that may be interchangeable with one another whereby the path of rotation of the stirs about the central axis of the body may be changed by switching out one of the plurality of gears with another of the plurality of gears. In a similar vein, each stir is preferably magnetically detachable to the gear means wherein switching out the placement of each stir changes the path of random rotation of the stirs about the central axis.

The invention discloses a UI animation control system based on a random tilt and color change algorithm, and the system comprises an animation execution module which drives a target UI element to rotate and change color attributes through an animation complement library; the random tilt calculation module generates a random rotation axis through vector cross multiplication and instructs the animation execution module to drive the target UI element to rotate along the random rotation axis in the 3D space; the dynamic trigger module comprises a control parameter n which is calculated in real time, and is used for monitoring at least one state parameter of the target UI element, comparing the state parameter with the control parameter n, and sending a trigger instruction to the animation execution module and the random tilt calculation module when a preset condition is met, the rotation and the color attribute change of the target UI element are driven. The problems that an existing UI animation is simple in dynamic effect, single in interaction mode and incapable of meeting the dynamic and interactive requirements of a user can be solved.

The utility model relates to the technical field of nuts, and discloses a four-claw nut which comprises a nut body, a four-claw mechanism and a limiting mechanism used for limiting are arranged at the top of the nut body, the four-claw mechanism comprises four spiral drill bits rotationally arranged at the top of the nut body in a sleeving mode, and the top end of each spiral drill bit is fixedly connected with a hexagonal head. According to the four-claw nut, the four spiral drill bits can rotationally cut the surface of a material, a self-drilling hole is formed, and a thread structure is formed while the four spiral drill bits are screwed into the material, so that the drawing resistance of the nut body is remarkably improved, the nut body is more stable in the material, and the four-claw nut is particularly suitable for a vibration or impact environment; the novel four-claw nut pierces materials step by step in a rotary cutting mode, the needed torque is small, installation is more convenient and faster, in addition, the spiral drill bit is used in cooperation with the limiting mechanism, the loosening problem caused by random rotation of the drill bit in the using process can be effectively avoided, and the reliability and practicability of the nut are improved.

The utility model relates to the technical field of pipeline transfer, in particular to a transfer device for water conservancy pipeline construction, which comprises a support, a moving part and a fixing frame are respectively arranged at the bottom and the top of the support, and a plurality of trays are arranged between opposite sides of the support and the fixing frame. The trays on the opposite sides are matched with partition pieces to be stacked and fix pipelines. Wherein the fixing frame and the support are connected through an adjusting assembly and fixed through a fixing assembly, the height of the fixing frame is adjusted through the adjusting assembly so that the fixing frame can be matched with the fixing assembly to fix pipelines with different stacking heights, and the stability can be further improved through the arrangement of partition pieces between the stacked pipelines; and in addition, the height of the fixing frame can be adjusted through the adjusting assembly, so that the pipelines with different stacking heights can be clamped, the fixing frame is fixed to the support through the fixing assembly, and the situation that the pipelines slip in the transferring process due to random rotation of the fixing frame is avoided.

The utility model belongs to the field of line pipe supports, and particularly relates to a line pipe support for building construction, which comprises a mounting plate, a plurality of uniformly distributed mounting holes are arranged in the mounting plate, the right end of the mounting plate is slidably connected with a supporting plate, the top of the supporting plate is rotatably connected with a plurality of uniformly distributed supporting seats, and the supporting seats are arranged on the mounting plate. The bottom of each supporting seat is fixedly connected with a rotating seat, and the rotating seats are rotationally connected with the supporting plate. According to the utility model, the limiting clamping sleeve is designed to clamp and fix a wire pipe, the rotating seat is rotatably connected with the supporting plate, the position of the limiting clamping sleeve can be rotatably adjusted, the supporting directions of the wire pipe at different positions can be conveniently adjusted, the using effect of the bracket is improved, and when the rotating seat is rotatably adjusted, the clamping ball is inserted into the groove, so that the rotating seat is convenient to adjust. The rotating seat and the supporting seat can be subjected to auxiliary limiting, and the situation that the supporting stability of the spool is affected by random rotation of the rotating seat and the supporting seat is avoided.

The application discloses a random rotation DEM structure for reducing switch activity, comprising a digital-to-analog converter, a digital input of the digital-to-analog converter is divided into an input code and a random rotation number, the random rotation number is input into a switch activity reduction structure through a barrel shifter output result delayed by a D flip-flop for one period, a feedback output of the switch activity reduction structure is fed back to the barrel shifter as an input, and an output of the barrel shifter after rotation controls corresponding switches and is connected to a corresponding cell array. The application uses input data to replace a pseudo-random number generator, and uses relatively simple logic to realize a switch activity reduction function, so that the complexity is reduced.

The utility model discloses a quick connector for nylon pipelines, which relates to the technical field of nylon pipeline connection and comprises a pipeline connector and a fixing mechanism, one side of the inside of the pipeline connector is in butt joint with a first nylon pipeline, and the other side of the inside of the pipeline connector is in butt joint with a second nylon pipeline. When the quick connector for the nylon pipeline is used, a limiting strip is inserted into a limiting ring through a fixing mechanism, then the nylon pipeline is limited and prevented from rotating randomly, then a rotating ring is driven to rotate through elastic force generated by resetting of a spring until an arc-shaped fixing pin penetrates through the limiting strip, and then the limiting strip is fixed to prevent the nylon pipeline from moving linearly; the nylon pipeline can be fixed only by pushing the rotating ring without repeatedly rotating the connector or the nylon pipeline, operation is easy and convenient, follow-up disassembly and maintenance are facilitated, and therefore the effect of conveniently and rapidly fixing the nylon pipeline is achieved when the quick connector for the nylon pipeline is used.

The invention relates to the technical field of pipelines, in particular to an isolating and locking blind plate device which comprises a blind plate rotationally connected with a barrel, the blind plate is connected with the barrel in a sealed mode, a locking device is arranged on the blind plate, a safety interlocking device is arranged on the barrel, the safety interlocking device comprises a mechanical lock and a blind plate pull ring spring bolt, and the mechanical lock is connected with the blind plate pull ring spring bolt. The blind plate pull ring spring bolt is used for limiting the opening of the locking device or the closing of the blind plate, the blind plate pull ring spring bolt can be inserted into or withdrawn from a lock head hole of the mechanical lock, and the mechanical lock can execute the insertion or withdrawal operation of the blind plate pull ring spring bolt only when the blind plate pull ring spring bolt is completely inserted into the lock head hole. According to the blind plate isolating and locking device provided by the invention, the opening or closing state of the blind plate can be supervised, and the safety problem caused by accidental touch and random rotation operation can be effectively prevented.

The invention relates to the technical field of optical fiber communication encryption, in particular to a multi-dimensional encryption method and system based on a three-dimensional Lorenz-like chaotic system, and the key point of the technical scheme is that a dynamic key is generated through Hash512 mixing, the three-dimensional Lorenz-like chaotic system is driven to carry out DNA bit encryption, encrypted bits are mapped into symbols, and Cat mapping scrambling is carried out three times, so that the dynamic key is generated; and performing constellation rotation on the scrambling symbol by using a random angle generated by chaos, and finally embedding the dynamic key into a rotation symbol sequence to form a final multi-dimensional encryption transmission sequence. According to the method, a high-complexity chaotic sequence is generated under a three-dimensional Lorenz chaotic system driven by a dynamic key through technologies of multi-dimensional encryption fusion DNA bit-level coding, Cat mapping scrambling, constellation random rotation and the like, so that the key space is greatly expanded, and the defense capability on brute force attack, differential attack and statistical analysis attack is improved; and a modular design is adopted, so that integration in an existing optical fiber coherent transceiving and DSP platform is facilitated, and the balance of high safety and low system load is realized.

The dust removal device comprises an equipment frame, a dust suction hood and a universal hose communicated with the dust suction hood, a transverse frame is connected to the inner side of the equipment frame in a sliding mode, a telescopic connecting piece is arranged between the transverse frame and the dust suction hood, two sliding arms are embedded in the transverse frame in a sliding mode, and the telescopic connecting piece is arranged between the two sliding arms. A transmission mechanism is arranged in the transverse frame, when the rotating arm rotates, the two sliding arms synchronously move under the action of the transmission mechanism, and a clamping structure for limiting random rotation of the rotating arm is arranged on the outer side of the transverse frame. According to the device, after the height position of the transverse frame is adjusted, the two sliding arms synchronously and reversely move by rotating the rotating arms until the ends of the sliding arms are tightly attached to the inner wall of the equipment frame, the vertical height of the transverse frame is fixed, and it is guaranteed that when the dust suction hood sucks and removes dust generated by bowl loading, the dust suction hood is not prone to falling off; and the transverse frame can be fixed at the vertical height, so that the stability of the dust collection cover during dust collection is ensured.

According to one aspect, an abrasive article includes: a backing; a primer, which covers the backing; an abrasive layer comprising abrasive particles and a binder; wherein the abrasive particles have a random rotational orientation; wherein the abrasive particles have a total height H and a fracture feature at a height of 55% H to 90% H. The fracture feature is configured to enable fracture when the particle has a front facing orientation with respect to the grinding direction by an amount greater than an amount of fracture when the particle is in a side facing orientation with respect to the grinding direction.

The utility model discloses a limiting locking device of butterfly valve relates to butterfly valve technical field. The limiting locking device of butterfly valve, including the valve body, the inside rotatory connection of valve body has the valve plate, and the upper end fixedly connected with the shaft sleeve of valve body, and the inside rotatory connection of shaft sleeve has the valve shaft, the valve shaft is fixedly connected with the valve plate, and the fixedly connected with the handle of the handle bar on the valve shaft, and the handle bar is rotatory connected with the handle on, and the inside of handle bar is provided with the installation slot of extending to the bottom, and the inside of installation slot is provided with the locking device. The limiting locking device of butterfly valve, the handle bar can rotate easily at this moment, thereby making the valve plate get open and close, when handle bar rotates to the specified position, reverse rotation handle, make screw rod reverse rotation, thereby making the limiting plate drive connecting plate and fixed plate reengage with half gear, thereby complete the locking to the butterfly valve, avoid the valve plate to be impacted by water body and produce the phenomenon of random rotation, thereby ensure that water body flow can not produce the random change.

The utility model discloses an interactive toy. The interactive toy comprises a shell; the shifting structure is rotationally arranged on the shell, and the shifting structure is provided with a driving part; the rotary drum structure is rotationally arranged on the shell, and the rotary drum structure is provided with a pattern display part and a driven part; the reset structure is arranged between the shifting structure and the shell; when driving force is applied to the shifting structure, the shifting structure rotates in the first direction, and the driving part is matched with the driven part to drive the rotary drum structure to rotate; and when the driving force to the shifting structure is cancelled, the shifting structure is driven by the reset structure to rotate in the opposite direction of the first direction, and the driving part and the driven part are separated from each other, so that the rotary drum structure rotates randomly. According to the utility model, the driving part is separated from the driven part by arranging the resetting structure, so that the rotating drum structure can rotate randomly after the driving force to the shifting structure is cancelled, the pattern change is unpredictable, and the interestingness and playability of the toy are obviously increased.

The machining tool comprises a bottom plate, the top of the bottom plate is fixedly connected with two supporting plates which are symmetrically distributed, the interiors of the supporting plates are rotationally connected with rotating seats through bearings, the outer sides of the rotating seats are fixedly connected with electric push rods, and the electric push rods are fixedly connected with the supporting plates. A mounting seat is fixedly connected to the outer side of the output end of the electric push rod, a clamping block is slidably connected to the interior of the mounting seat in a sleeved mode, a supporting block is fixedly connected to the right end of the supporting plate, and a motor is fixedly connected to the top of the supporting block. Through the design of the electric push rod, the output end of the electric push rod can drive the mounting seat and the clamping block to horizontally move, the clamping block can clamp and position the cam shaft, the rotation of the rotating seat can be realized under the action of the motor, the cam shaft can be conveniently rotated, and the insertion matching of the ball and the groove is matched; and the rotating seat after rotation can be limited, random rotation of the rotating seat and the cam shaft is avoided, and follow-up machining is facilitated.

The utility model discloses a ceramic lining composite steel pipe with flange plates, which comprises a ceramic lining composite steel pipe body, the outer side of the ceramic lining composite steel pipe body is rotatably sleeved with two symmetrically distributed flange plates through bearings, and a plurality of annular and uniformly distributed mounting holes are formed in the flange plates. According to the utility model, the flange plate is designed and can be used for connecting, mounting and using the composite steel pipe, the flange plate can rotate through the rotational connection of the flange plate and the ceramic lining composite steel pipe body, and the ceramic lining composite steel pipe body does not need to be rotated in the butt-joint mounting process of the flange plate; butt joint installation and use are more convenient, the relative positions of the flange plates and the ceramic lining composite steel pipe body can be fixed through insertion connection of the balls and the grooves, random rotation of the flange plates can be avoided to a certain degree, and the stability during butt joint is improved.

The application discloses a kind of reducer shell strength detection devices, it is related to reducer shell detection technical field, including article table, and the shell body of placing on article table upper surface, and the two sides of shell body are equipped with two symmetrical distribution hard frame, two the hard frame inside are filled with several steel balls, and steel ball can be adapted to move with the concave-convex surface of shell body outer wall, to realize the overall uniform extrusion of shell body;The outside of hard frame is sequentially stacked with movable plate and positioning plate, the two sides of the back of movable plate are equipped with several link mechanisms for linking hard frame, movable plate can apply disturbance to steel ball, by steel ball adaptive to fit shell body concave-convex surface displacement, realize the overall of shell body, cooperate irregular arc-shaped sliding groove drive turntable random rotation, disturb steel ball distribution, pressure uniform distribution while opening local random pressurization, accurate simulation complex working condition, improve test comprehensiveness and authenticity.

The utility model relates to a clamping device for metal material manufacturing, which comprises a fixed seat and a rotary seat which are distributed up and down, and the rotary seat is rotatably mounted on the fixed seat; a telescopic supporting leg is installed on the side face of the rotating base and comprises a transverse rod and a vertical rod, the vertical rod is in an L shape, the upper end of the vertical rod is sleeved with a clamping sleeve, the transverse rod is movably inserted into the transverse end of the vertical rod, a spring is connected between the transverse rod and the transverse end of the vertical rod, and the stretching direction of the spring is the same as the extending direction of the transverse rod; the transverse rod is connected to the rotating base through threads. According to the utility model, the metal plate can be positioned in the center of the rotating seat through the automatic rebounding of the four telescopic supporting legs, and the shielding of the telescopic supporting legs on the metal plate can be relieved in the polishing process, so that the edge of the plate can be polished more smoothly. And the metal plate can rotate at will through the rotating seat, so that the angle of the metal plate can be adjusted, and a worker can polish the edge more smoothly.

The invention discloses a Luneberg lens and a Luneberg lens antenna, and relates to the technical field of Luneberg lenses, the Luneberg lens comprises multiple layers of concentric spherical shells with different radiuses, and the inner space of each layer of concentric spherical shell is provided with multiple metasurface units. All the metasurface units in the internal space of the same concentric spherical shell are arranged after random rotation, so that the normal direction of each metasurface unit in the internal space of the same concentric spherical shell is randomly distributed, and the internal space of each layer of concentric spherical shell has an isotropic effective dielectric constant. The invention aims to reduce the weight of the Luneberg lens, reduce the complexity of the Luneberg lens and enable the Luneberg lens to have an isotropic characteristic.

1. Name of this design: Mahjong machine telescopic petal-shaped opening and closing random rotating silencer cover. 2. Purpose of this design: To protect the central lifting rod and the internal base when pushing mahjong tiles into the shuffling pool of a mahjong machine, providing a buffering effect and reducing noise. 3. The key design feature of this product is its shape. 4. The picture or photo that best illustrates the key design points: Design 1 3D diagram 1. 5. Design 2 is designated as the basic design.

The utility model relates to the technical field of video telephones, and discloses a structure for realizing any rotation angle of a video telephone, comprising a microphone, a rotating shaft assembly and a support, the side surface of the video telephone is provided with the microphone, and the lower end of the video telephone is provided with the support through the rotating shaft assembly. The rotating shaft assembly comprises a screw in the middle, and a rotating shaft static sheet and a rotating shaft moving sheet which are mounted on the screw, a damping sheet sleeves the screw on the outer side of the rotating shaft static sheet, a nut is screwed at the tail end of the screw, the bottom of the rotating shaft moving sheet is mounted on the bracket through a fixing screw, and the rotating shaft static sheet is mounted on a fixing hole in the inner side of the video phone through a fixing screw; according to the utility model, through the arrangement of the damping fin, the damping fin provides friction force in the rotation process to realize stepless rotation, the requirement of any angle is met, the space of the loudspeaker at the bottom of the video phone is fully utilized to install the rotating shaft assembly, and no extra volume is increased or no more desktop space is occupied.

The utility model discloses a fixing clamp for operation, which relates to the technical field of lead fixing clamps and comprises a fixing plate, a detachable clamping mechanism arranged at the top of the fixing plate, an adhesive layer arranged at the bottom of the fixing plate and adhesive protecting tearing paper arranged on the other side of the adhesive layer. The clamping mechanism comprises a base, a rotating seat, a clamping plate, a buckle and a spring lock catch; the rotating seat is rotationally arranged at the top of the base, the clamping plate is an upwards-protruding arc-shaped plate, one end of the clamping plate is hinged to the top of the rotating seat, the clamping plate can rotate around the hinge point, the buckle is arranged at the bottom of the other end of the clamping plate, the spring lock catch is arranged at the top of the rotating seat, and the buckle is clamped in the spring lock catch; a spring clamping block is arranged at the bottom of the base, use convenience is improved, the position of the clamping mechanism can be adjusted, meanwhile, random rotation can be achieved, arrangement is convenient and fast, time and labor are saved, and practicability is improved.

The application provides a lens cutting trajectory line fitting method, which comprises the following steps: S1, fitting a scanning straight line formed by point spectrum of a lens surface and a protective film surface under a random rotation angle; S2, intersecting the scanning straight line of the lens surface and the scanning straight line of the protective film surface at a point, and finding an intersection point of the two scanning straight lines, which is a cutting point; S3, rotating the lens and the protective film, and making the swing speed of the point spectrum greater than the rotation speed of the lens and the protective film, and then jumping to step S1, so that a large number of different cutting points can be found, and the cutting points are fitted into a cutting line, so that the problems of non-transmission of the protective film and non-imaging of the lens are overcome, and the real cutting trajectory line is found.

The utility model discloses a detachable handrail for a ship, which relates to the technical field of shipbuilding, and comprises a base, each outer side of the base is fixedly provided with a mounting plate, a cavity is arranged in the base, a sleeve is fixedly arranged on the top surface of the base, a vertical rod is inserted in the sleeve and clamped on the sleeve, and the vertical rod is fixedly arranged on the base. During use, the base and the vertical rod can be quickly mounted and dismounted, the mounting and dismounting efficiency of the handrail is greatly improved, a deck cannot be damaged, the multi-scene use requirements of a ship are met, the mounting and dismounting efficiency of the handrail is improved, and the mounting and dismounting efficiency of the handrail is improved. And the stability and safety of the handrail after installation can be guaranteed, inclination of the vertical rods is reduced, random rotation of the vertical rods is avoided, and the safety of personnel on the ship can be effectively guaranteed.

The utility model relates to the technical field of polishing machines, in particular to a gear type grinding and polishing machine which comprises a bottom frame and further comprises a grinding device, the grinding device comprises a grinding cylinder, a rotating shaft, a limiting rod, an abutting disc, a jacking assembly and a rotating assembly, the rotating shaft is rotationally installed on the bottom frame, and the grinding cylinder is fixedly installed on the rotating shaft; the limiting rod is fixedly installed in the grinding cylinder, the abutting disc is slidably installed on the limiting rod, the jacking assembly is arranged on the grinding cylinder, the rotating assembly is arranged on the bottom frame, a grinding material and a to-be-polished workpiece are placed in the grinding cylinder, the to-be-polished workpiece is limited through the limiting rod, and meanwhile the abutting disc slides in along the limiting rod; and the abutting disc is pressed through the pressing assembly, so that the to-be-polished workpiece is limited, and the situation that when the to-be-polished workpiece is polished by a grinding material, the to-be-polished workpiece rotates at will, and collision and damage are caused is avoided.

To provide an instrument capable of safely executing secret calculation by a person with simple operation.SOLUTION: A secret calculation instrument includes a plurality of input value components whose states of front and back are associated with 0 and 1. The plurality of input value components can be combined in a state in which the front and back cannot be distinguished. A combined structure in which the plurality of input value components are combined is configured to be reflection-symmetrical with respect to a reference line, and the front and back cannot be distinguished. An observation state is defined by randomly rotating, in an invisible state, the combined structure in an input state that is arranged in a state in which the input value component indicates an input value or bit inversion of the input value and in a state in which the front and back are concealed. An output state is defined by observing the front and back of the predetermined input value components in the observation state and inverting the front and back of the combined structure by reflection conversion with respect to a reference line based on observation results. In the output state, a state of the predetermined input value component is defined as an output value of a logical calculation.SELECTED DRAWING: Figure 2

The utility model discloses a microscope detection device, and relates to the technical field of microscopes. Comprising a rotating cylinder and a rotating part, the rotating cylinder is movably arranged on the outer wall of the supporting rod in a sleeving mode, and the rotating part is arranged on the base. According to the microscope detection device, the rotating cylinder is driven to rotate through the rotating part, switching between the two objective tables can be conveniently carried out, different samples can be detected, frequent sample replacement is not needed, the sample detection efficiency is greatly improved, random rotation of the rotating shaft and the rotating cylinder can be prevented through the limiting assembly, and the detection accuracy is improved. The positioning accuracy after the objective table is switched is ensured, so that the microscope can accurately focus when acquiring microscopic image information of a sample, the problem of image blurring caused by position deviation of the objective table is avoided, and the detection accuracy is improved.

The utility model relates to the technical field of cleaning appliances, and discloses a dustpan which comprises a dustpan hopper, a dustpan rod set and a limiting assembly, the end of the dustpan rod set is connected with the dustpan hopper, and the dustpan rod set can rotate in the first direction relative to the dustpan hopper; the rotating axis of the dustpan rod group coincides with the central axis of the dustpan rod group; the limiting assembly is arranged between the dustpan hopper and the dustpan rod set and used for limiting the dustpan rod set to rotate in the second direction relative to the dustpan hopper, and the first direction is opposite to the second direction. According to the dustpan provided by the utility model, the limiting assembly is arranged between the dustpan hopper and the dustpan rod group and is used for limiting the dustpan rod group to rotate relative to the dustpan hopper in the second direction, so that the dustpan rod group can only rotate in one direction in the first direction; therefore, the dustpan rods are prevented from being abraded and loosened due to random rotation of the dustpan rod group relative to the dustpan hopper, and the service life of the dustpan is prolonged.