43results about How to "Eliminate positioning errors" patented technology

The invention relates to the technical field of semiconductors, in particular to a SiC epitaxy merging detection method and system.According to the SiC epitaxy merging detection method and system, a graphite ring or a wafer or a graphite disc can be independently subjected to edge searching and deviation correction through a merging and splitting module, an edge finder and a deviation correction platform, and a mechanical arm can complete transferring of the wafer or the graphite ring or the graphite disc through fixed grabbing or placing actions; the positioning precision of the wafer is improved, the positioning error in the wafer installation process is effectively eliminated, the combination and separation module can quickly complete the separation and combination action between the graphite ring and the wafer or the graphite disc, the wafer, the graphite ring and the graphite disc which are combined can be smoothly put into an epitaxial growth environment, and the wafer processing quality is ensured; and through arrangement of the laser sensor and the acquisition equipment, automatic detection is realized, manpower is effectively saved, and positioning errors caused by manpower are reduced.

The invention relates to an electromagnetic navigation system, a data synchronization method and device thereof and electronic equipment, the electromagnetic navigation system comprises a field emitter and a magnetic sensor, the field emitter comprises a first emission unit and a second emission unit; the first transmitting unit is used for generating a working magnetic field which is used for positioning the magnetic sensor; the second transmitting unit is used for generating a reference signal, and the reference signal is used for synchronizing magnetic field detection data and magnetic field working data of the working magnetic field; wherein the magnetic field detection data is obtained by detecting a working magnetic field through a magnetic sensor, and the magnetic field working data is provided by a field emitter; the first emission unit and the second emission unit are configured to share a work clock of the field emitter. According to the application, the problem that the positioning error of the magnetic sensor is increased due to the fact that time difference exists between the time information of the magnetic field working data and the time information of the magnetic field detection data corresponding to the same physical moment in an existing electromagnetic navigation system is solved.

The utility model discloses a multi-degree-of-freedom control rod drive rod simulation device, which is used for being connected with a control rod unconnecting buckle tool and comprises a plurality of supporting legs used for adjusting levelness. The horizontal position adjusting unit is connected with each supporting leg, the height adjusting unit is connected with the horizontal position adjusting unit, and the control rod drive rod simulation unit is connected with the height adjusting unit; the control rod drive rod simulation unit comprises an annular rod and a core rod which are used for being connected with two clamps of the control rod connection and disconnection buckle tool respectively, and the annular rod is connected to the periphery of the core rod in a sleeving mode. The annular rod and the core rod are respectively connected with the two clamps of the control rod connecting and disconnecting tool, and can be used for testing the functions of the two cylinders of the control rod connecting and disconnecting tool. The levelness, the horizontal position and the height position of the control rod drive rod simulation unit can be adjusted through the supporting legs, the horizontal position adjusting unit and the height adjusting unit respectively, the work of building a scaffold is omitted, and the working efficiency is improved.

This invention belongs to the field of additive-subtractive composite manufacturing technology, and discloses a five-axis linkage additive-subtractive composite machine tool and control system. The machine bed base assembly has left and right guide rail seats symmetrically fixed on both sides of its top. The worktable is fixed in the middle of the machine bed between the two guide rail seats. An integral crossbeam is mounted across the top surface of the left and right guide rail seats and can move linearly along the X-axis. Two independent machining units are mounted in parallel along the Y-axis on the integral crossbeam: the subtractive side crossbeam slide plate carries a subtractive slide block and a subtractive electric spindle actuator, and the additive side crossbeam slide plate carries an additive Z-axis slide table and a double-swing additive head. The worktable is divided along the X-axis into a subtractive-specific machining area, a composite machining area, and an additive-specific machining area. The two machining units can operate independently in their respective dedicated areas, or enter the composite machining area at different times to collaboratively complete the additive-subtractive composite machining. This invention combines high structural rigidity with machining flexibility, avoids secondary workpiece clamping errors, and significantly improves machining efficiency and accuracy.

The utility model discloses a hydraulic rotary clamp for casting part machining, which relates to the technical field of rotary clamps and comprises a bottom plate main body, a first support plate and a tool bottom plate, and the first support plate is welded on one side of the top end of the bottom plate main body. When the hydraulic rotary clamp for casting part machining is used, the mounting rotary disc, the connecting rod block and the oil cylinder body are used in cooperation, rotation of the bearing clamp is achieved, the bearing clamp is fixed after rotating to a preset angle, then one-time clamping multi-angle machining is achieved, positioning errors caused by repeated clamping and repeated positioning are eliminated, and the machining efficiency is improved. And meanwhile, the working efficiency is improved, so that the effects of reducing errors and improving the working efficiency are achieved, the bottom plate main body is limited through the auxiliary mechanism, then the clamp can be limited on a working table without repeatedly rotating multiple sets of bolts, follow-up disassembly is facilitated, and therefore when the hydraulic rotary clamp for casting part machining is used, the work efficiency is improved, and the work efficiency is improved. And the effect of facilitating limiting installation is achieved.

This invention provides a system and method for the automatic assembly of screws on large antenna arrays. The system includes an assembly mechanism, which includes an end effector; a linear motion mechanism, on which the assembly mechanism is mounted and moves along a first horizontal direction under the drive of the linear motion mechanism; a lifting mechanism, disposed on one side of the linear motion mechanism along a second horizontal direction; the antenna array can move vertically under the drive of the lifting mechanism; a vision mechanism, fixed to the end effector, for acquiring feature images of screw holes on the antenna array; and a control unit, electrically connected to the linear motion mechanism, the lifting mechanism, the assembly mechanism, and the vision mechanism. The control unit controls the linear motion mechanism and the lifting mechanism to adjust the relative position of the end effector and the screw holes on the large antenna array, and completes the precise alignment of the end effector and the screw holes based on the feature images of the screw holes acquired by the vision mechanism, so that the end effector completes the screw tightening assembly.

This invention relates to the field of lawn maintenance technology, and discloses a fusion perception method, device, equipment, and medium suitable for autonomous mobile devices. By introducing dynamic inverse perspective transformation assisted by lidar, it achieves a visual image projected onto a three-dimensional real terrain. Combined with deep fusion of visual and lidar data, it generates a high-precision, semantically rich three-dimensional environment model. This model can effectively reflect the terrain undulations and obstacle distribution in complex lawn environments, achieving multimodal perception with good environmental adaptability and high real-time performance on a low-cost hardware platform, supporting accurate and safe navigation and efficient task execution for the autonomous mobile device. It breaks the strong assumption of an absolutely flat ground surface, utilizing real-time lidar data to construct a non-planar ground model, achieving deep fusion of visual and lidar information, thereby improving perception accuracy and robustness with low-cost hardware configuration.

This invention discloses a multifunctional analyzer combining CL-LIBS-LA-ICP-MS, comprising a laser optical path module, an electronic excitation system, a spectral detection module, a sample chamber, and a mass spectrometry detection module. The laser optical path module includes a laser source, a beam adjustment system, a scanning galvanometer, and a coaxial microscopic observation system. The spectral detection module includes a light signal collection end, an echelle grating spectrometer, a gated camera, and a timing control module. Another aspect of this invention discloses an analytical method, comprising setting the environment to vacuum and performing CL imaging scanning; selecting a LIBS test area based on the CL imaging scan image and performing LIBS scanning; selecting a third test area based on the LIBS scan results, filling the sample chamber with carrier gas, and performing laser ablation mass spectrometry detection. This invention eliminates the positioning error caused by sample transfer between multiple instruments during combined techniques, provides more comprehensive information on the structure and composition of the sample, and further improves the detection efficiency of the entire method through two screening test ranges.

The invention discloses an anomalous body positioning method and system combining borehole transient electromagnetic and geological radar, and relates to the technical field of mine safety detection, and the method comprises the steps: synchronously collecting the borehole transient electromagnetic data and geological radar data of an ore body to be analyzed, and generating a borehole transient electromagnetic imaging graph and a borehole geological radar imaging graph; two-dimensional coordinates of a target abnormal point in the borehole geological radar imaging graph are extracted, and the corresponding target apparent resistivity is determined; drawing an apparent resistivity contour map based on the target apparent resistivity in a target radial sectioning map of the borehole transient electromagnetic imaging map, and determining a plurality of candidate three-dimensional coordinates of a target abnormal point; at least one target feature point is selected from the borehole geological radar imaging graph, and the feature apparent resistivity corresponding to the target feature point is determined; and drawing a feature circle based on the target feature points, and screening the plurality of candidate three-dimensional coordinates to obtain coordinates of the geological anomalous body. According to the invention, the technical problem of insufficient positioning precision and reliability in the prior art is solved.

The invention discloses a heavy mud rod carrying truss manipulator, belongs to the technical field of heavy material automatic carrying equipment, and is suitable for automatic grabbing, carrying and accurate stacking of soft mud rod type cylindrical rod materials. The mechanical arm comprises an X-axis fixed frame body, a Y-axis movable frame body, a Z-axis lifting assembly, an R-axis rotation assembly, a wrapping and clamping gripper assembly and an electromagnetic band-type brake assembly, all shaft systems are of gear and rack transmission structures, and multi-axis linkage space precise movement is achieved; the electromagnetic band-type brake assembly detects the rotating speed through an encoder and is matched with gear and rack meshing to achieve Z-axis anti-falling braking, and potential safety hazards are eliminated. All driving, detecting and braking components are electrically connected with an external control system, full-automatic operation is achieved, the problems that traditional mud rod carrying is poor in adaptability, products are prone to being damaged, positioning is not accurate, and anti-falling protection does not exist are solved, and carrying efficiency and operation safety are greatly improved.

The utility model discloses a positioning frock for part processing relates to part processing device technical field, the utility model discloses a work table is provided with locking mechanism and centering clamping mechanism on, locking mechanism includes two U shape support plate fixedly connected in the work table bottom, two the U shape support plate between rotatoryly connected with pivot no.

This invention relates to the field of laser cutting technology and discloses a metal tube laser cutting device, including a guide rail, an auxiliary support device on one side of the guide rail, a metal tube placed on the auxiliary support device, a clamping and rotating drive mechanism, and a laser cutting mechanism. The laser cutting mechanism includes height-adjustable mounting seats located on both sides of the metal tube. A laser cutting head for cutting the sidewalls of the metal tube and a grinding head for grinding the ends of the metal tube are respectively mounted on opposite sides of the two mounting seats. This invention, by incorporating a laser cutting mechanism with grinding heads between two clamping and rotating drive mechanisms, allows the metal tube to undergo immediate end deburring via the grinding heads after laser cutting, eliminating the need for repeated clamping, effectively reducing process steps and improving production efficiency.

This invention relates to an endoscopic surgical navigation method and device based on video image augmented reality. The method includes: segmenting the key surgical areas of interest and selecting anatomical landmarks from preoperative CT images; installing passive tracking tools on the patient's surgical site and the endoscope; registering the real patient with a 3D model using calibrated probes and anatomical landmarks; calibrating the endoscope parameters under the navigation system; determining the transformation matrix of the passive tracking tool coordinate system relative to the endoscope coordinate system; projecting and rendering the 3D model of the preoperatively segmented key surgical areas of interest using a pinhole model simulation and processing it with distortion parameters to obtain a virtual image; and fusing the virtual image with images acquired in real time by the endoscope and displaying it. Compared with existing technologies, this invention fuses virtual images with real endoscopic images and presents them on the same screen, reducing the surgeon's intraoperative judgment time and lowering the difficulty of hand-eye coordination.

The invention relates to the technical field of satellite communication, and discloses a logistics transportation position monitoring method and system assisted by satellite communication. The method comprises the following steps: calculating a satellite-ground distance and a line-of-sight unit vector according to a satellite position coordinate and a terminal estimation position coordinate, and generating a baseband signal based on a three-axis speed component and the line-of-sight unit vector; calculating a target peak value based on the baseband signal, and when the target peak value exceeds a noise threshold, extracting a pseudo-range measurement value and solving a three-dimensional space positioning solution with the satellite position coordinates; calculating a path constraint position from the three-dimensional space positioning solution to the optimal path section; and accumulating a reference mileage from a starting point to the optimal path section, calculating an accumulated driving mileage, converting the path constraint position, packaging the path constraint position and the accumulated driving mileage into a monitoring data packet, and reporting the monitoring data packet to a logistics monitoring platform. According to the invention, high-precision logistics position monitoring in a mobile scene is realized, and the monitoring precision and scheduling efficiency of logistics transportation are effectively improved.

This utility model discloses a machining fixture for the main boom of an aerial work platform, comprising: a machine tool worktable and an end positioning and clamping device, a rotary clamping device, and a tail-side pushing and clamping device mounted on the machine tool worktable. The end positioning and clamping device, the rotary clamping device, and the tail-side pushing and clamping device are arranged sequentially at the front, middle, and rear of the machine tool worktable, and the three can automatically and collaboratively clamp the main boom of the aerial work platform. This application achieves automatic positioning and multi-point collaborative clamping of the main boom workpiece, eliminating positioning errors caused by manual operation. The hydraulic drive system ensures synchronous operation of each clamping device, shortening the clamping preparation time. The adaptive adjustment mechanism is compatible with workpieces of different specifications, reducing the number of tooling changes. The composite clamping method disperses contact stress, preventing clamping deformation of thin-walled structural parts. The multi-directional constraint mechanism effectively suppresses machining vibration and improves the positional accuracy of hole machining.

The utility model discloses a double main shaft three knife tower numerical control machine tool, including the machine base that is equipped with three parallel X axle guide rail. Two independent control's knife tower mechanism is equipped on first X axle guide rail, can cooperate or independent operation, the coaxial opposite arrangement of first main shaft mechanism and movable second main shaft mechanism is equipped on second X axle guide rail, realizes workpiece automatic butt joint and shift, third X axle guide rail is equipped with third knife tower mechanism. The machine tool passes through the innovative layout of three knife towers and double main shaft, supports multiple high -efficient processing mode: two knife towers can synchronize and process one end of a workpiece, and third knife tower processes the other end or another workpiece, also can realize workpiece automatic shift to another main shaft after one end processing, and is continued processing the other end by any one or two knife towers. Therefore, on one hand can greatly improve production efficiency and equipment utilization, on the other hand eliminates the manual turn -around clamping link, positioning error and downtime are reduced significantly, is suitable for the high -speed precision machining of complex parts.

The utility model discloses a multilayer printed circuit board blind hole inspection device belongs to the field of circuit board, a multilayer printed circuit board blind hole inspection device, including equipment base, the top of equipment base is fixed with the U -shaped equipment frame, and the bottom of U -shaped equipment frame inside is provided with industrial camera, and the top of equipment base is provided with the clamping mechanism for circuit board clamping, and the top of equipment base still is provided with the turnover mechanism for clamping mechanism turnover, and the clamping mechanism includes the U -shaped frame, and the one end bolt fixing of U -shaped frame has the fourth drive motor, through the setting of clamping mechanism and turnover mechanism, makes two U -shaped clamping post can hold the circuit board of different size to the blind hole detection of circuit board, makes the circuit board can turn over, realizes the double -sided automatic detection of circuit board, eliminates the positioning error caused by manual turnover, reduces manual intervention, improves detection efficiency.

The application discloses a laser cutting production line for chain manufacturing and relates to the technical field of chain production cutting tools. The production line comprises a positioning table, a first lead screw, a guide rod, a limiting block, a guide roller and a detection assembly, and is provided with a data acquisition unit, a data processing unit and a control execution unit. The detection assembly comprises a supporting table, a second lead screw and a laser sensor and the like structure, can collect material size and position signals, drive a servo motor and a driving motor to act after data processing, drive the displacement of the limiting block and the laser sensor, realize automatic centering positioning of the material and self-adaptive adjustment of the detection position, and simultaneously configure a closed-loop correction unit to correct the position of the limiting block in real time. The application can replace manual adjustment, improve positioning and cutting precision, adapt to processing of materials of multiple specifications, shorten the debugging time, reduce production cost, and improve the automation level and production efficiency of the production line.

This invention provides an environmentally friendly packaging box with a smart viewing window, comprising a box body, a closed viewing window on the side of the box, and the molding material of the box comprising, from the outside in, a barrier coating, a paper layer, and a functional film layer; the opening of the viewing window penetrates only through the barrier coating and the paper layer, and the functional film layer remains intact in the area covered by the opening, directly forming the closed bottom surface of the viewing window; the barrier coating is a water-based environmentally friendly coating, coated or laminated on the outer surface of the paper layer, and the paper layer and the functional film layer are bonded together by an adhesive layer; the functional film layer is a biodegradable film with oxygen and water vapor barrier properties, wherein smart indicator material is uniformly dispersed. While ensuring the functionality of the viewing window, this invention simultaneously improves the environmental performance, intelligence level, barrier performance, and production efficiency of the packaging.

The invention discloses an oil cylinder barrel machining method and a numerical control boring machine, the numerical control boring machine comprises a machine tool, a headstock, a guide rail and an oil receiver, and further comprises an outer circle cutting device arranged between the headstock and the oil receiver, and the outer circle cutting device comprises a first moving mechanism, a second moving mechanism and a tool apron; the first moving mechanism is used for driving the second moving mechanism and the tool apron to reciprocate on the guide rail; the second moving mechanism is used for driving the tool apron to reciprocate in the direction perpendicular to the guide rail. The tool apron is used for installing a turning tool for machining the outer circle frame position. It can be seen that the outer circle cutting device is additionally arranged on the numerical control boring machine, one-time clamping synchronous machining of the inner hole of the oil cylinder barrel and the outer circle frame position is achieved, positioning errors and reference conversion errors caused by multiple times of clamping are eliminated, and the coaxiality precision of the inner hole of the oil cylinder barrel and the outer circle frame position is greatly improved; the assembling and using requirements of high-precision hydraulic oil cylinders such as coal mine hydraulic support oil cylinders are met, the machining efficiency is improved, and the overall production period is shortened.

The invention discloses a teacher state detection method and device, and a storage medium, and relates to the technical field of recording and broadcasting. The method comprises the steps that a first target object is recognized in a teacher panoramic image, a second target object is recognized in a student panoramic image, and the first target object and the second target object are imaging results with a teacher as a shooting target; determining a change trend of the first target object according to the teacher panoramic image and the historical teacher panoramic image, and determining a change trend of the second target object according to the student panoramic image and the historical student panoramic image; and determining a target object state according to the first target object and the corresponding change trend as well as the second target object and the corresponding change trend, wherein the target object state comprises a platform-on state and a platform-off state. Through the above technical means, errors caused by height differences of teachers when a single panoramic image detects the state of the teachers getting on and off the platform can be eliminated, and the problem that the state of the teachers getting on and off the platform cannot be accurately judged in the prior art is solved.

The utility model relates to the technical field of cubilose processing, in particular to a connecting plate structure of a cooling tunnel, which comprises a plate arranged between a tunnel body and a transfer device, a first frame and a second frame are respectively fixed on a vertical plate of the transfer device, and two ends of the plate are respectively and fixedly connected with the first frame and the second frame. Wherein the vertical plate is further provided with a plurality of supporting units, the supporting units are used for being connected with the middle of the plate, the upper surface of the whole connecting plate is punched, block decomposition is carried out under the condition that the strength of the connecting plate is not damaged, and under the cooperation of the supporting units, the height can be conveniently adjusted in a segmented mode; the whole plate is innovatively divided into blocks, flexible interval adjustment is facilitated, the flatness of the protruding part of the plate is adjusted, the overall flattening effect is achieved, in addition, transverse displacement spaces are designed for the multiple supporting units, and the position error of length change of the plate in the horizontal adjustment process can be eliminated.

The invention discloses a PCB and three-layer insulated wire integrated planar transformer and a winding implementation device thereof, and relates to the technical field of transformer production equipment.The transformer comprises a machining table, a positioning assembly and a winding assembly are arranged at the top of the machining table, a pressing assembly is arranged on the winding assembly, and the pressing assembly comprises a first connecting rod; and the top of the first connecting rod is fixedly connected with a mounting box. According to the PCB and three-layer insulated wire integrated planar transformer and the winding implementation device thereof, continuous and flexible pressure provided by the pressing spring is transmitted to the pressing block through the pressing rod, real-time and self-adaptive pressing of three layers of insulated wires in the winding process is achieved, and the winding implementation efficiency is improved. The dynamic pressing mechanism can ensure that each turn of wire rod is tightly and flatly attached to the surface of the PCB, and the wire rods are effectively prevented from loosening or bouncing off, so that the overall flatness and the structural stability of the winding are remarkably improved, and meanwhile, a solid foundation is laid for achieving the ultrathin design of the transformer.

The application discloses a kind of intelligent management method and system of tin paste warehouse, it is related to warehouse management technical field, including, analysis MES system work order data, synchronous acquisition refrigerator temperature, material tank coordinates and weight data, construct dynamic mapping three-dimensional warehouse model, adopt quantum annealing algorithm to optimize mechanical hand movement path, calculate multi-objective parameter, output optimal path instruction to drive equipment;Record tin after distribution and use state, secondary weighing verification to return warehouse material tank, according to the comparison result of weight change rate and pre-set scrap weight threshold, update the material state of three-dimensional warehouse model;Compare mechanical hand actual path with mechanical hand optimization calculation, iteratively update path weight coefficient in three-dimensional warehouse model and synchronize three-dimensional warehouse state.The application constructs three-dimensional dynamic warehouse model based on refrigerator temperature gradient distribution and material tank position weight, optimizes refrigeration area space utilization rate by coordinate mapping, and eliminates mechanical hand positioning error by combining space-time compensation algorithm.

This invention discloses a flexible material conveying and packaging device and its control method, including an input conveyor belt, a clamping platform, a blocking mechanism, a guiding clamping mechanism, a sorting platform, a transfer platform, a transfer mechanism, and an output mechanism. The blocking mechanism guides the material to the clamping platform; a vision detection unit identifies the orientation of the material's long side; the guiding clamping mechanism, driven by a first multi-axis robot, rotates to be parallel to the long side of the material, receives a single row of material, and transfers it to the sorting platform, repeating this operation to accumulate and form an initial aligned array of materials; the sorting clamps push and straighten the material to form a regular array; the regular array is moved to the transfer platform and precisely positioned by positioning clamps; the transfer mechanism, driven by a second multi-axis robot, loads the regular array into a box. This invention achieves high precision, high flexibility, and a compact layout for material sorting and boxing through two-stage sorting and multi-axis robot handling.

This invention discloses a multi-station three-dimensional shaft pulling device and its usage method for a high-speed film production line. The shaft pulling device includes a shaft pulling mechanism, a transverse movement mechanism, and an upper shaft mechanism connected sequentially along the conveying direction of the air-expanding shaft. The shaft pulling mechanism has a shaft pulling station, and the upper shaft mechanism has an upper shaft station. The shaft pulling mechanism and the upper shaft mechanism are respectively located on opposite sides of the transverse movement mechanism. In the transverse movement mechanism, the first transverse movement movable frame moves horizontally relative to the transverse movement fixed frame, and its extreme positions are the shaft pulling station and the upper shaft station. The second transverse movement movable frame moves horizontally relative to the first transverse movement movable frame, and its extreme positions are the opposite sides of the first transverse movement movable frame. The usage method is to place the multi-station three-dimensional shaft pulling device near the winding mechanism of the high-speed film production line. The air-expanding shaft is pulled out by the shaft pulling mechanism. The first and second transverse movement movable frames in the transverse movement mechanism move horizontally. After receiving the air-expanding shaft at the shaft pulling station, it is sent to the upper shaft station.

The invention relates to the technical field of ground target positioning by an unmanned aerial vehicle, in particular to a ground target positioning method based on time accumulation. Comprising the steps that the unmanned aerial vehicle flies according to a preset linear route, and an airborne photoelectric turret of the unmanned aerial vehicle aligns to and continuously tracks a ground target; collecting target position observation data at different angles, and storing the data in an airborne computer of the unmanned aerial vehicle; performing real-time processing and analysis on the collected data through a specific algorithm to identify a random error mode; by filtering and fusing the data, errors are eliminated, and the precision of a positioning result is improved. The method has the advantages that random errors are eliminated by adopting time accumulation data, so that the method has higher resistance to environmental change and sensor noise; the method improves positioning precision, enhances robustness, optimizes data processing and real-time performance, is high in adaptability, is easy to integrate, improves application value, and enhances decision support.

The utility model discloses a kind of battery and bluetooth device, wherein battery includes shell, electric core and insulation structure.The shell has accommodating cavity and the mounting hole being communicated with accommodating cavity;Electric core includes electric core main body and first tab, and electric core main body includes the first pole piece and the second pole piece woundly arranged, first tab is connected to first pole piece and extends to the outside of accommodating cavity via mounting hole along first direction, and first tab includes connecting portion, and connecting portion is located at the outside of accommodating cavity, for being connected with external circuit;Insulation structure is used to make first tab and shell insulation arrangement.Therefore, when the battery of the present embodiment is installed on bluetooth device, the extension direction of first tab can be directly observed to adjust the angle of external circuit, without the need to refer to the identification outside the shell, thereby eliminating the position error of first tab due to the installation error of electric core and top cover, thereby enhancing the elimination effect of external circuit on current noise.

This invention discloses a visually guided auxiliary positioning device for precise placement of radiotherapy patients. It includes a radiotherapy main unit with a treatment bed on one side. Above the treatment bed are two annular plates forming a semi-circular structure. A visual guidance mechanism is located on one side of each annular plate, and an auxiliary positioning mechanism is located on the other side. The visual guidance mechanism includes a first inner groove formed inside the annular plate, and a top groove communicating with the first inner groove is formed on the outer surface of the annular plate. This invention, by setting up an annular movable visual guidance mechanism and using a motor-driven steel wire rope transmission, combined with an annular slide and pulley guide structure, achieves full-range annular position adjustment of the visual positioning component. With a flip angle fine-tuning structure, it can adapt to the positioning needs of lesions in different parts of the patient's body, such as the head and neck, chest and abdomen, and limbs, from multiple angles without blind spots. This solves the problems of fixed visual positioning range and poor adaptability of traditional equipment, significantly improving the positioning accuracy and flexibility of radiotherapy placement.

The utility model relates to a positioning device used for a wafer measurement driving mechanism, the positioning device is installed at a positioning station of the wafer measurement driving mechanism, the positioning device comprises a center positioning module, a rotation phase positioning module and a code identification module, the center positioning module comprises two clamping arms and a clamping arm driving assembly, the clamping claws located on the two clamping arms abut against the edge of the wafer respectively, the wafer abutting portions, abutting against the edge of the wafer, of the clamping claws are always located on the circumference with the fixed circle center position and the same radius, the circle center position is located on a rotating shaft of a rotary table module of the wafer measurement driving mechanism in the positioning station state, and the wafer center positioning precision is improved. Meanwhile, the rotating phase positioning module and the code identification module which are arranged above the central positioning module are driven by the same radial driving equipment to move to proper radius positions, and are used for detecting and identifying directional nicks and codes at the edge of the wafer respectively, so that the number of times that the wafer needs to be transferred between different stations is reduced, and the working efficiency is improved. The measurement process is simplified, and the measurement time is saved.