84results about How to "Achieve parallelism" patented technology

The invention provides a data resource authority management method based on an access control list, which comprises the following steps: S1: setting an access control authority list and a related user list for a directory / file of data resources on the basis of authority inheritance rules; S2: retrieving a name of a user who is going to access from an accessible user group name set, an authority value set and a user name set of the directory / file to be accessed, and receiving the returned authority value; S3: judging whether the authority value is null, and if not, executing S4; and S4: permitting the user who is going to access to execute the corresponding access operation according to the authority value, and if the authority value is null, retrieving the name of the user who is going to access in a recursive mode, and returning to the step S3. The method can enhance the access authority inquiry efficiency of large-volume data resources, and implement simple and independent data resource authority management and control.

The invention belongs to the field of radar signal processing and discloses a GPU-based video SAR echo simulation parallel implementation method. The method comprises the following steps: copying radar system parameter values from a memory of a CPU to a constant memory of a GPU; transmitting original scene image data in the memory of the CPU to a video memory of the GPU; setting a kernel function and parallelly calculating space coordinates and backscattering coefficients of each point target; setting a kernel function and parallelly calculating space coordinates of a radar platform and instantaneous squint angle between the radar platform and each point target in each azimuth sampling moment; setting a kernel function and carrying out segmentation on all point targets and obtaining echo signals of the point targets in all segmented data; setting a kernel function and obtaining an initial echo signal of the radar at all azimuth moments; and setting a kernel function and obtaining a final echo signal obtained after linear frequency modulation processing as a video SAR echo signal. The method has the advantages of high real-time performance and high efficiency.

The invention provides a time-space parallel simulation method for the transient stability of a large-scale power system. The method comprises the following steps: establishing a model for an alternating current-direct current system; performing space decoupling on the alternating current-direct current system, and performing time decoupling on a direct current system; performing parallel simulation calculation on the alternating current-direct current system. The method disclosed by the invention uses a CPU / GPU (central processing unit / graphic processing unit) heterogeneous platform to realize the transient simulation of a large-scale alternating current-direct current interconnected power system, according to the independence of the alternating-current system and the direct-current system on the space and the characteristic that the alternating-current system and the direct-current system are easy to decouple in an electrical respect, a calculation task corresponding to the alternating-current system is assigned to a CPU, a calculation task corresponding to the direct-current system is assigned to a GPU, and parallelism on the space is realized; a traveling time window technique is used, the waste of GPU calculation resources is avoided, and the utilization efficiency of the GPU is improved.

The invention relates to a dynamic binary translating method of software-hardware co-design for realizing a virtual machine coprocessor of a processor chip on a hardware level, which comprises a binary translator unit, a TCache manager unit and the like, wherein management and check of the TCache is realized via the hardware, and fast check of the Tcache is realized in from of instructions, further, as the binary translator unit is realized via the hardware, a master processor executing the object instruction avoids necessary switching to translate, and the start time and the Miss time can be relieved well. The software portion comprises load of heterogeneous executable program, execution of the object instruction, optimization of hot codes and the like. Through tightly coupling of hardware and software, coexistence between the overall virtual machine and the original system can be effectively controlled, thereby achieving internal parallelism. Because single processor supports a plurality of instruction sets, instruction compatibility problem of heterogeneous processors is solved, further, compared with the conventional virtual machine with pure software, properties and transparency are increased, and the speed of the virtual machine can be close to the local execution speed.

The invention discloses a multithread realization method for a rasterization stage in graphic rendering. The method comprises the following steps of: calculating a bounding box of a three-dimensional object, and dividing the bounding box into n areas corresponding to n threads; dividing triangular plates into corresponding subareas of the n divided areas; executing triangular plate filling in the subareas corresponding to the threads with number equal to that of CPUs (Central Processing Units); continuously executing other threads until all n threads are entirely executed, thus completing filling of the triangular plates. By utilizing the multithread realization method for the rasterization stage in graphics rendering, disclosed by the embodiment of the invention, the filling speed of the triangular plates in the graphic rendering can be greatly increased, the graphic rendering method can not be depended on CPU operation, graphic rendering can be directly carried out on the basis of CPUs, the multithread method can be used for realizing the parallelism of the three-dimensional rasterization stage.

The invention discloses a method for reconfiguring the system architecture based on a unified hardware task interface. The method firstly designs the hardware task interface, and the whole system is implemented using a modular design process. The modular design is generally divided into functional design, resource estimation, Module realization and module integration are carried out in four stages. The invention aims at the large data volume processing and calculation real-time requirements in the data encryption application, can realize the state control of the encryption module, and provides a simple and easy-to-use interface that has nothing to do with the underlying implementation. And when the system is running, real-time online switching of algorithm modules can be realized, which has good versatility.

The invention discloses a method for utilizing mathematical morphology to optimize integrated circuit layout, aiming at solving the problems of low precision and non-intuitionism of the prior optimizing method. Different layout optimizing methods are adopted by the invention for defects of different types. In the specific process, the plane layout of each layer of an integrated circuit to be estimated is numbered according to wire mesh; for redundant material defects, cum right key areas of short circuits are extracted; the cum right key areas of the short circuits are sorted according to wire mesh pairs; according to the sorting result, the layout is optimized for the first time; for missing material defects, cum right key areas of open circuits are extracted; the cum right key areas of the open circuits are sorted according to the wire mesh and the layout is optimized for the second time according to the sorting result. The method for utilizing mathematical morphology to optimize integrated circuit layout has the advantages of high optimizing precision, simplicity and easy operation and can be used for optimizing the integrated circuit layout in the microelectronic field to further improve the yield of integrated circuits.

The invention provides an MTF test apparatus and method for a small off-axis optical system. The apparatus is mainly composed of a collimator, an MTF detection system, a planar reflector and a two-dimensional rotating mechanism, wherein the two-dimensional rotating mechanism is in rigid connection with the plane reflector, the collimator and the MTF detection system are located at the same optical axis, and the plane reflector is located between the collimator and the MTF detection system. With the MTF test apparatus and method for the small off-axis optical system of the invention adopted, a test adjustment mechanism is simplified greatly, and is convenient to operate; and the plane reflector and an optical system to be tested form a test module, and therefore, a series of optical performance modular tests can be carried out, and operation procedures can be simplified, and test efficiency can be improved.

The invention discloses an ion electric propulsion beam doubly charged ion testing device and an assembling method thereof, and can provide a magnetic field and an electric field, so as to realize testing of doubly charged ions in a beam. The device includes an outer shell, a collimation sleeve, a drifting tube, permanent magnets, electrode plates, an ion current collecting cup and a small hole assembly; the small hole assembly includes three small hole parts, and each has multiple sets of spare components which are the same in shape and have small inner holes with different apertures; and during testing, the spare component with the required aperture is selected according to intensity of a measured signal and a test resolution requirement to be mounted, thus adjustment of the test resolution can be realized through replacement of a small hole set, thereby enabling an adaptive range of the device to be expanded. Through the design of adjusting components and fixed components, parallelism between the permanent magnets, parallelism between the electrode plates and perpendicularity between the permanent magnets and the electrode plates are realized, thereby ensuring directions of the magnetic field and the electric field. The ion electric propulsion beam doubly charged ion testing device adopts a relation transformation method, thereby enabling an assembling process to be simpler and more convenient, and enabling an assembling result to be more accurate.

The application discloses a UV-visible absorption detection system based on a micro-fluidic chip and a detection method thereof. The UV-visible absorption detection system comprises a chip substrate, a micro-channel formed on the chip substrate and a UV absorption detector integrated on the chip substrate, wherein the micro-channel comprises a detection channel, and rays generated by the UV absorption detector are parallel to the extending direction of the detection channel. A light source of the UV absorption detector emits in and out in the horizontal direction of the chip, namely, in the direction parallel to the channel of the chip, so that the problem of short absorption optical path is solved; a UV-visible absorption detection operation unit is simple, low in detection cost and strong in university; the UV-visible absorption detector is integrated into the micro-fluidic chip, so that detection convenience is realized, and the quantity of the consumed solution can reach several or dozens of micro-liters. Compared with a traditional UV-visible absorption detection system, the detection method provided by the invention is greatly lowered in sample consumption, and has significance on detection of ions, micromolecules and the like in the field of environmental water or food.

The invention discloses an axial displacement sensor clamping device, and the device is used for clamping an axial displacement sensor which is used for a pipe test of a petroleum thermal production well. The device comprises a guide rod (3), a lower support (2), a horizontal adjustment part (7), and a locking apparatus. One end of the guide rod (3) is fixed at the upper part of a test piece, andthe other end of the guide rod is connected with a displacement sensor (4). The lower support (2) is fixed at the lower part of the test piece, and extends towards a side to form a chute. The horizontal adjustment part (7) can slide in the chute, and is fixedly connected with a measurement core rod (6) in a measurement hole of the displacement sensor (4). The locking apparatus is used for fixing the horizontal adjustment part (7) after the horizontal adjustment part (7) slides in place. Through the adjustment of the parallelism of the displacement sensor and a sample, the device guarantees that the measurement direction of the displacement sensor is consistent with the axial of the sample.

The invention discloses a stator coil completely-automatic topology expansion machine used for an MW wind power generator, belong to the filed of motor equipment technique. The topology expansion machine comprises a machine body, a linear edge expansion arm mechanism, a nose clamp mechanism and a hydraulic station; the topology expansion machine is characterized in that the middle part of the machine body is provided with an expansion arm core shaft; the linear edge expansion arm mechanisms have two groups which are respectively sleeved on the front part and the rear part of the expansion arm core shaft; a radius magnification mechanism is sheathed on the linear edge expansion arm mechanism which extends for expansion by rotating correspondingly to the same expansion arm core shaft from a vertical state to a horizontal state; the nose clamp mechanism is provided with two groups which are respectively arranged at the left side and the right side of the expansion arm core shaft; the nose clamp mechanism is provided with an automatic locking mechanism and a nose clamp axial sliding mechanism which straightens a shuttle-shaped coil. The stator coil completely-automatic topology expansion machine has the advantages of good expansion effect, high precision, and needing no recovery after expansion.

The invention discloses a device for arranging and debugging a linear laser light source, which consists of a camera, a passive pen, reflective stripes and a debugging indication module, wherein the reflective stripes are used for reflecting light rays emitted from the linear laser light source; the camera shoots an image and outputs the shot image; the debugging indication module consists of a debugging unit and a signal display unit; and when the image is shot, a pen point of the passive pen is downwards vertically arranged at two positions at different distances away from the linear laser light source on a central optical axis of the linear laser light source on a touch panel respectively. The invention also discloses a method for arranging and debugging the linear laser light source. According to the position, illuminated by the laser light source, of the passive pen in the image shot by the camera and the brightness of the reflective stripes, the optical axis of the linear laser light source is adjusted to be parallel to the touch panel, and the illumination range of the linear laser light source is ensured to cover the whole touch panel so as to finish the debugging of the linear laser light source accurately and conveniently.

The invention provides a material irradiation damage spatial resolution random cluster dynamics parallel simulation method, which can realize large-scale SRSCD simulation. The method comprises the following steps: allocating simulation volumes of spatially resolved random cluster dynamics to different processes, establishing a three-dimensional Cartesian topological structure of the processes, anddividing a region of the processes into a plurality of sectors; determining a communication data structure; traversing each sector in sequence according to a sector number sequence; calculating a time threshold of circulation in each sector, and entering internal circulation; and randomly selecting a reaction in the current sector, updating the defect according to the selected reaction, filling the communication data list and updating the related reaction, communicating with the neighbor process when the evolution time of the internal loop is greater than the time threshold of the internal loop, synchronizing the corresponding defect information and updating the related reaction. The invention relates to the technical field of nuclear material irradiation damage simulation and the field of parallel computing.

The invention provides an RAID6 data recovery optimization method based on a Phytium platform. The RAID6 data recovery optimization method based on the Phytium platform comprises the following steps that S1, using an NEON register to carry out single-time multi-byte access; S2, performing recovery factor conversion; S3, carrying out single-time multi-byte double-parity inspection; And S4, storingthe recovered data. The method has the beneficial effects that the design and implementation of the acceleration algorithm are autonomous, and the autonomous controllability is high; the originality of the implementation mode is achieved, the parallelism of data recovery is realized by fully utilizing the NEON characteristic of the Phytium processor and the mathematical relationship between the RAID6 Galois field multiplication tables; The implementation effect is obvious, the single-byte processing before optimization is broadened to 16-byte processing after optimization, and the CPU instruction period occupied by RAID6 data recovery is greatly saved.

The invention discloses a high-level comprehensive method and system for graph calculation, and belongs to the field of big data processing, and the method comprises the steps: (1) generating a graphcalculation program according to a functional programming model taking a point as a center; (2) specifying architecture parameters and micro-architecture parameters by adding an optimization instruction; (3) compiling a graph calculation program into modular data flow intermediate representation according to the data flow graph and the optimization instruction; (4) according to a mapping relationship between the IR module and the hardware template, mapping the intermediate representation of the data stream to a bottom-layer architecture, and instantiating an assembly line and a buffer area inthe hardware template; (5) if the instantiated parameterized hardware templates and the overall architecture meet constraint conditions, turning to the step (6); otherwise, turning to the step (3) after modifying the optimization instruction; and (6) generating a hardware language code which can be synthesized. Effective support can be provided for generating a graph application RTL from an upper-layer language, so that the execution parallelism degree of graph calculation on an FPGA is improved.

The invention discloses a hydraulic movable dam, which comprises a rebar ground anchor piece, a hinged support, a movable plate, a hydraulic station, an oil pipe, a hydraulic cylinder and two support rods, wherein the rebar ground anchor piece is deeply buried in the foundation of the dam; the part, which extends out of the ground, of the rebar ground anchor piece is provided with the hinged support; the hinged support is a loop-type hinged support; the hinged support is provided with a concentric shaft; the concentric shaft penetrates through the hinged support and is movably connected with the hinged support; the movable plate is provided with two hydraulic rods and the two support rods; the hydraulic rods and the support rods are in articulated juncture with the movable plate; the hydraulic rods and the support rods are controlled by the hydraulic cylinder; the hydraulic cylinder is connected with the hydraulic station through the oil pipe; the hydraulic station is used for controlling the direction, the pressure and the flow of oil flow. The movable dam disclosed by the invention is simple in structure and convenient in operation, and can swing within a range of 0-180 degrees, and thus, single-sided and two-sided water stopping of the movable dam can be conveniently realized; the concentric shaft is fixedly arranged on the loop-type hinged support, so that the concentric shaft and a base are prevented from being changed in position, and the water leakage of the bottom part of the movable dam is effectively prevented.

The invention discloses a flexible shaft grinding head system of large-lead ball nut grinding, and further discloses a grinding method for machining a nut. According to the flexible shaft grinding head system of large-lead ball nut grinding, a power output end of a mechanical flexible shaft is connected and assembled with a front end small shaft through a flexible shaft connector, a driven end of the mechanical flexible shaft is coaxially and fixedly connected with a motorized shaft connection shaft head, an axis of rotation of a grinding wheel is coaxially arranged with the front end small shaft, the grinding wheel is fixed on the front end small shaft of the grinding wheel through a compression screw of the grinding wheel, and a connection angle alpha of the axis of rotation of the grinding wheel and an axis of the mechanical flexible shaft is in accordance with an angle of a thread lead angle of the nut to be grinded for grinding and machining the nut to be grinded. The flexible shaft grinding head system is constructed due to the adoption of a combined shaft with shaft end couple vector directions randomly adjustable, so that the connection angle of the axis of rotation of the grinding wheel and a grinding rod axis accords with different lead angles, and interference of a grinding wheel grinding rod and a nut inner ring is avoided. The flexible shaft grinding head system of large-lead ball nut grinding and the grinding method for machining the nut are applicable to long-distance grinding and machining of large-lead nut inner rolling passages.

The invention relates to a four-ring inertial stabilization platform frame zero calibration method. A frame shaft is parallel to an accelerometer sensitive shaft after the four-ring inertial stabilization platform frame is zeroed, so that the calibration precision of an inertia instrument of the four-ring inertial stabilization platform, the conversion precision of the posture of a platform body to the posture of a carrier and the navigation precision of a platform system are improved. The method mainly comprises the following steps of 1), zero calibration of a follow-up ring frame, 2), zero calibration of a shaft frame of the platform body, and 3), zero calibration of an outer ring shaft frame.

The invention discloses a novel automatic full-spectrum radiometric calibration reference target device, and relates to the technical field of the aerial remote sensing. The device comprises a reflector module, a sun sensor module, an attitude regulation and control module and an electric control system; the attitude regulation and control module is connected with the reflector module and used for driving the reflector module to rotate; the sun sensor module is arranged on the reflector module, and an optical axis of the sun sensor module is parallel to a reflector normal of the reflector module; and the sun sensor module and the attitude regulation and control module are connected with electric control system. The device disclosed by the invention is suitable for the full-spectrum radiometric calibration of high-orbit and low-orbit optical remote sensing satellites, thereby realizing the absolute radiometric calibration and image quality assessment of satellite loads at different orbits at the sun reflection waveband, the middle infrared waveband and the hot infrared waveband (0.35 micron to 12.5 micron).

The invention discloses a nozzle trolley structure of a digital printing machine, which includes a back plate, a casing and a nozzle. The casing includes two side plates and a bottom plate. The nozzle is fixed on the bottom plate. The adjusting plate, the adjusting plate includes a first connecting plate and a second connecting plate arranged at right angles, the first connecting plate and the side plate are hingedly connected and the casing can rotate around the hinge point, and the casing is provided with a The casing is fixed on the limit piece on the adjusting plate, and a moving structure is arranged between the second connecting plate and the back plate to drive the adjusting plate to move in the vertical direction, and at the same time discloses a digital printing machine with the nozzle trolley structure The purpose of the present invention is to provide a digital printing machine nozzle carriage structure and a high-precision digital printer that can improve installation efficiency while ensuring installation efficiency.

Provided is a planetary gear reducer capable of being manufactured at low cost without integrally forming the carrier and pins. A first side plate (4), which is a carrier, has a circular disc-like shape, and pins (7) are affixed so as to protrude from one end surface of the first side plate (4) in the axial direction. The first side plate (4) has a small outer diameter on the one end surface side in the axial direction and a large outer diameter on the other end surface side in the axial direction. The first side plate (4) is provided with: press-fit hole sections (41a) into which the pins (7) are press fitted; and small-diameter-side recesses (41b) which are formed in the press-fit hole sections (41a) on the one end surface side in the axial direction, are open in the one end surface of the first side plate (4) in the axial direction, and each have, in at least a part thereof, an inner peripheral surface not in contact with the pin (7).

The embodiment of the invention discloses a bus structure for interconnecting a microcomputer with peripheral equipment. The bus structure consists of a clock line SCL (Serial Clock Line) and N data lines SDA (Serial Data Line), wherein the number of the data lines is selected according to the actual requirements; the total width of the bus structure is N+1; and the peripheral equipment is connected with a host CPU (Central Processing Unit) by the N data lines and one clock line of the bus structure. By the bus structure, the parallel and bidirectional transmission of N bits of data is implemented; and the data lines are expanded so that the data transfer rate can be multiplied.

The invention provides a sounding pipe parallel limiting device. Sounding pipes are connected with a reinforcement cage in a foundation pile; the steel reinforcement cage comprises vertical ribs parallel to each other, inner stirrups and outer stirrups, wherein the inner stirrups and the outer stirrups are connected with the vertical ribs. The limiting device comprises a double-layer ribbed steelring connected with the vertical ribs and vertical sleeves arranged on the inner side of the steel ring at equal intervals. The sleeves are used for accommodating the sounding pipes. According to thetechnical scheme provided by the invention, by adopting the double-layer ribbed steel ring and the vertical sleeves arranged on the inner side of the double-layer ribbed steel ring, the requirementsof parallel and equidistant installation of the sounding pipes can be met; and the limiting device is annular, enough space is reserved for concrete pouring and vibrating in the center, and detectionsignals cannot be affected. The parallel limiting device is simple in structure and convenient to apply, and can replace the effect of inner stirrups or inner and outer stirrups in reinforcement cagemanufacturing, so that raw materials and material resources and manpower of the inner stirrups are saved, and the cost and the construction complexity are reduced while the performance is improved.

The invention discloses an underground net washing machine and a net washing module and a net washing method thereof. The underground net washing machine comprises a framework and at least one cleaning plate arranged on the framework. The net washing module is of a planar symmetric structure. The at least one cleaning plate is arranged at the front end of the framework. A plurality of nozzles areuniformly arranged on each cleaning plate, wherein an installation dip angle is formed between the center line of each nozzle and a cleaning end surface of the cleaning plate. Fixing seats used for mounting the cleaning plates are further fixedly arranged on the framework. Seat holes are formed in the fixing seats correspondingly. The cleaning plates are provided with rotary shafts correspondingly. The rotary shafts of the cleaning plates are mounted in the seat holes correspondingly, so that the cleaning plates are rotationally mounted on the fixing seats correspondingly; and through holes communicating with the corresponding nozzles are formed in the rotary shafts of the cleaning plates correspondingly. A plurality of propellers are arranged at the rear end of the framework. Each propeller is driven to rotate by power provided by an independent motor. According to the underground net washing machine and the net washing module and the net washing method thereof, the net attachment isbetter during cleaning work, and the cleaning quality is high.

The invention discloses an automatic smearing device for forestry tree planting. The automatic smearing device is composed of moving wheels, a supporting bottom plate, a parallel moving mechanism, a storage battery, a lifting mechanism, a first smearing mechanism, a second smearing mechanism, a storage bucket, a pressure pump, a supporting frame, a first feeding pipe, a second feeding pipe, a control switch and handles; the pressure pump is installed in the storage bucket, the storage battery is placed on one side of the storage bucket to provide power for the pressure pump, one end of each ofthe first feeding pipe and the second feeding pipe is installed in the storage bucket and connected with the pressure pump, and the other end of each of the first feeding pipe and the second feedingpipe is installed on the upper portion of a storage tank; and the lime paste in the storage bucket is gradually transported into the storage tank, and the lime paste in the storage tank flows into a smearing part through a discharging hole so as to smear the surfaces of the trees. The automatic smearing device has the beneficial effects that the surfaces of the trees can be automatically smeared,the smearing efficiency is greatly improved, the work burden is relieved, and the automatic smearing device is simple in structure, convenient to operate, high in adjustability and suitable for the smearing work of the trees of different diameters.

The embodiment of the invention provides a parallel implementation method, a device and a system for advanced motion vector prediction AMVP. The parallel implementation method includes: a motion vector prediction election set of a coding unit of a coding end is constructed in a parallel way by all the prediction units in the coding unit; motion vector prediction is carried out by all the prediction units in the coding unit in a parallel way according to the motion vector prediction election set constructed by the prediction units; motion estimation is carried out by every prediction units in the coding unit according to the prediction motion vector generated by the prediction unit. In the parallel implementation method, the device and the system for advanced motion vector prediction, a motion vector prediction election set of a coding unit of a coding end is constructed in a parallel way by all the prediction units in the coding unit, motion vector prediction is carried out by all the prediction units in the coding unit in a parallel way according to the motion vector prediction election set constructed by the prediction units, and motion estimation is carried out by every prediction units in the coding unit according to the prediction motion vector generated by the prediction unit, thus parallel for motion estimation of the prediction units of a coder end is achieved.

The invention provides a telecentric lens and a laser radar system comprising the telecentric lens, and belongs to the technical field of optics. The telecentric lens comprises a first super lens and a diaphragm, wherein the first super lens comprises a first plane substrate and first nano structures; the first nano structures are arranged on one side of the first plane substrate, and the first nano structures are arranged periodically; and the diaphragm and the first super lens are matched with the same optical axis so that the chief ray angle of incident light in the object space or the image space of the first super lens is smaller than 8 degrees. The telecentric lens provided by the embodiment of the invention is simple in structure, small in size, low in mass production cost and high in consistency, and the chief ray angle is smaller than 8 degrees.

The invention discloses a measuring device which comprises a main unit, a microwave feedback system, a hoop and at least three connecting bolts. The connecting bolts are not positioned in the same straight line, the axes of the connecting bolts are positioned on the vertical directions, the lower ends of the connecting bolts are fixedly connected onto the microwave feedback system, bolt holes are formed in the main unit, a nut is further connected onto each connecting bolt in a threaded manner, and the main unit is in bolted connection with the microwave feedback system by the connecting bolts. The measuring device has the advantages that the length of each connecting bolt between the microwave feedback system and the main unit can be adjusted, so that the levelness of the lower end surface of the microwave feedback system can be adjusted; similarly, the inclination can be roughly adjusted by the aid of the hoop, the hoop brings convenience for mounting the measuring device, accordingly, microwave transmitting and receiving ends of the measuring device are parallel to monitored liquid levels, the intensity of reflected waves which are reflected onto the microwave feedback system can be improved advantageously, the inclination of the microwave transmitting and receiving ends can be adjusted conveniently, and the measuring device has low requirements on mounting support manufacturing and mounting precision.