104results about How to "Reduce positioning errors" patented technology

The invention discloses a pipeline defect positioning method, device and equipment, a medium and a product. An SPPF-LSKA optimization instance segmentation model is combined with an ORB-SLAN3 framework, and dynamic feature points are eliminated by using information of an RGB-D depth map and an instance segmentation mask; secondly, a sliding window confidence evaluation mechanism is introduced, the credibility of feature points can be dynamically evaluated, wrong feature points generated due to instantaneous false detection are removed in time, and high-precision dynamic point removal is achieved; and finally, in a back-end optimization stage, a double-layer map strategy is adopted, a static mapping layer participates in BA optimization to reduce a positioning error, and a dynamic observation layer independently records an optical flow speed and a segmentation result of a dynamic region for dynamic interference analysis and does not participate in global optimization, so that interference of dynamic factors on positioning precision is avoided.

The invention discloses a deep sea cable fault accurate positioning method based on electromagnetic induction and transient characteristic analysis, and relates to deep sea electric power engineering. According to the technical scheme, the method comprises the steps of 1, signal excitation used for transmitting a signal source; 2, signal filtering is carried out to counteract geomagnetic background noise; 3, signal correction is carried out to solve the problems of modal aliasing and endpoint effect existing when a traditional EMD is used for processing complex signals; 4, signal feature extraction, wherein transient pulse features in the signals can be effectively enhanced; and step 5, fault positioning. The method is mainly used for non-intrusive fault detection of the power cable in the kilometer-level deep sea high-pressure environment, and high-precision fault point positioning is achieved.

The utility model provides an electronic paper point screen crimping device which comprises at least one group of crimping modules and specifically comprises a driving module which comprises an X-direction driving mechanism and a Y-direction driving mechanism, and the Y-direction driving mechanism is arranged on the X-direction driving mechanism; the crimping module is installed on the Y-direction driving mechanism and comprises an opening-closing type driving mechanism, an upper crimping assembly and a lower crimping assembly, the upper crimping assembly and the lower crimping assembly are symmetrically arranged in the vertical direction, and the opening-closing type driving mechanism drives the upper crimping assembly and the lower crimping assembly to move oppositely or reversely; each of the upper crimping assembly and the lower crimping assembly comprises a fixed part, a floating part and a buffer structure connected with the fixed part, a probe is arranged in the fixed part, and the floating part is provided with a through hole for the probe to pass through; when the distance L1 between the upper crimping assembly and the lower crimping assembly is reduced to L2, the floating part pre-flattens the crimping end of the to-be-crimped product and completes correction and alignment; the buffer structure deforms, so that the floating part stops moving and the fixed part continuously moves until the upper probe and the lower probe are in contact with the surface of the product; and the visual unit is arranged above the crimping module. And the crimping precision and accuracy are improved.

The application provides an automatic system and an assembling method of double-line supply integrated assembly, which comprises a first supply line and a second supply line, the first supply line and the second supply line are collected to a positioning assembly output line through a robot taking materials, the first supply line comprises a multi-axis running feeding machine and a secondary positioning platform in sequence, the second supply line comprises a flying feeder, an adsorption material taking device, a clamping material taking device, a point laser height measuring instrument and an upper visual positioning scanning module are arranged on an execution end of the robot, the positioning assembly output line comprises a lower visual positioning module and a product circulation mechanism in sequence, a positioning installation station is arranged on the product circulation mechanism, a material positioning module and a material blocking module are arranged at the positioning installation station, and the execution end of the robot is matched with the flying feeder, the secondary positioning platform, the lower visual positioning module and the positioning installation station in sequence. Through the double-line supply cooperation, multi-stage visual positioning and full-process automation design, the efficiency bottleneck and the precision problem in the assembly of special-shaped parts are effectively solved.

The application discloses a time difference positioning method based on random robust least square, mainly solves the threshold effect of the existing time difference positioning method when the measurement error increases, and leads to the problem of sharp deterioration of positioning accuracy, and the implementation scheme is as follows: a plurality of observation stations and noise measurement errors are set, the time difference positioning equation is obtained by using the position parameters and the measurement errors, an auxiliary variable is defined, the auxiliary variable is introduced into the time difference positioning equation to establish a constraint equation, the constraint equation is processed by using a random robust least square method to obtain a cost function, the cost function is solved by using a least square method to obtain a target position, a new constraint equation is established according to the internal relation of the auxiliary variable elements, the new constraint equation is solved by using a weighted least square method to obtain a positioning error, the target position is linearly corrected by using the positioning error to obtain a final positioning result, and the target positioning is completed. The application reduces the positioning error, improves the positioning accuracy and the robustness of positioning, and can be used in aerospace, navigation and electronic warfare.

The invention discloses a multi-mode fusion positioning method and system for diving bell emergency communication, and relates to the field of signal localization, and the method comprises the steps: collecting underwater mixed sound signals, and carrying out the spectrum analysis of the underwater mixed sound signals, and obtaining environment background noise characteristic parameters; inputting the underwater mixed sound signal into a preset bistable stochastic resonance system model, and adjusting a barrier height parameter of the bistable stochastic resonance system model according to the environmental background noise characteristic parameter to obtain an effective signal waveform after signal-to-noise ratio enhancement; performing signal separation on the effective signal waveform to obtain a continuous sound wave carrier signal and a positioning pulse signal; doppler frequency shift analysis is carried out on the continuous sound wave carrier signal to obtain a radial speed, and time arrival difference calculation is carried out on the positioning pulse signal to obtain a slant distance; and carrying out data fusion on the radial speed and the slope distance to obtain fused data, and obtaining a motion track and a current three-dimensional coordinate of the diving bell according to the fused data.

The invention discloses a lithium battery aluminum shell size detecting and positioning device and method, belongs to the technical field of lithium battery accessory production, and aims to solve the problems that an existing detecting device is single in function and low in efficiency due to the fact that clamping needs to be conducted for multiple times, and an aluminum shell is prone to deformation. Four groups of clamping parts are symmetrically arranged on the support frame, and a bidirectional screw is used for driving a first clamping plate and a second clamping plate to synchronously clamp an aluminum shell from the inner side and the outer side, so that stable positioning is realized; the internal measuring part drives a distance sensor to rotate through a stepping motor and cooperates with an electric push rod to complete inner cavity size measurement. The external measuring part adopts a similar structure to realize outer wall dimension detection, the support frame is driven by the driving motor to lift, internal and external dimension continuous measurement under one-time clamping is realized, the device reduces positioning errors, avoids aluminum shell deformation, improves detection precision and efficiency, and is suitable for lithium battery aluminum shell production quality control.

This invention relates to the fields of artificial intelligence and medical device technology, and particularly to an automatic method and system for locating back acupoints in a transdermal drug delivery device. The invention identifies bilateral acromion key points using raw back acupoint location data and calculates individualized body-weighted measurements corrected for BMI. Based on the acromion key points, a two-dimensional reference coordinate system is constructed with the Dazhui acupoint as the origin, and the theoretical pixel coordinates of the target back acupoints are calculated. Infrared thermal imaging is used to complete multimodal mapping verification and output precise execution coordinates. Hand-eye calibration and trajectory planning drive the robotic arm of the transdermal drug delivery device to achieve precise drug delivery, and cloud-based iterative optimization is performed based on the positioning process data. This invention combines anatomical benchmark positioning, individualized measurement, and multimodal biometric verification, significantly improving the accuracy and robustness of acupoint location for people of different body types, achieving automation, individualization, and high precision in back acupoint location, and improving the standardization level and therapeutic effect of transdermal drug delivery.

This utility model relates to the field of gearbox parts processing technology, and discloses a gear-shaping fixture for gearbox gear processing, including a rotating base. A rotating ring is movably connected in the inner cavity of the rotating base. A spiral rack is fixedly installed on the upper part of the rotating ring, and a helical gear ring is fixedly installed on the bottom of the rotating ring. A servo motor is fixedly installed at the front of the inner cavity of the rotating base. A helical gear is fixedly sleeved on the output shaft of the servo motor, and the outer extension of the helical gear meshes with the helical gear ring. A moving rod is evenly and movably sleeved in the inner cavity of the rotating base above the rotating ring. The bottom of the moving rod is evenly provided with grooves, which fit with the spiral rack. The servo motor drives the rotating ring, and with the fit between the spiral rack and the grooves, the moving rod drives the clamping plate to fix the internal gear. This facilitates the fixture to fix internal gear rings of different diameters, enhances the applicability of the fixture, improves the working efficiency of the fixture, ensures that the internal gear ring is centered, and reduces positional errors.

The invention relates to the technical field of motor shell machining production equipment, in particular to high-precision explosion-proof motor drilling and milling machining equipment which comprises a milling machine, the milling machine is connected with a transferring assembly for controlling a motor shell to move, the transferring assembly comprises a bottom table, a carrying block is movably installed on the bottom table, a clamping disc is installed on the carrying block, and a supporting rod is installed on the clamping disc. A tray for placing the motor shell is mounted on the supporting rod, and a clamping assembly for fixing the motor shell is mounted on the clamping disc. The high-precision explosion-proof motor drilling and milling equipment has the effect of improving the convenience of the high-precision explosion-proof motor drilling and milling equipment in the operation process.

The invention provides a gas-water interface monitoring method, device and equipment in a salt cavern energy storage project, and the method integrates a resistivity detection module, an audio density detection module and a magnetic positioning detection module into a single underground unit, does not need a central tubular column, and can synchronously collect three parameters only through one-time well descending. The depth reference of the casing shoe is accurately determined through magnetic positioning, the position of the gas-water interface is comprehensively calculated through complementary verification of two-parameter sudden change points of resistivity and density, and the measurement error of a single method is effectively eliminated. According to the method and the corresponding device and equipment, high-precision positioning of the gas-water interface is achieved, the monitoring efficiency is remarkably improved, the operation complexity and cost are greatly reduced, and reliable technical support is provided for safe and efficient operation of gas sealing of a salt cavern energy storage project.

The invention relates to the technical field of wireless communication networks, in particular to an optimization method and system based on a 6G air base station combined with Beidou satellite positioning. The method comprises the steps of collecting signal propagation path data through a 6G and Beidou signal receiving device, and performing fusion processing in combination with environmental data; calculating an initial positioning result by adopting a geometric positioning algorithm based on the fused data, and analyzing dynamic environment interference to generate an interference analysis result; correcting the fusion data according to the interference analysis result and the environment data to generate correction parameters; determining a final positioning error correction parameter by performing matching degree detection and adaptive adjustment on the correction parameter and the environmental data; and optimizing the initial positioning result by using the parameter, and outputting final positioning data. According to the invention, through accurate signal propagation path analysis, dynamic environment interference compensation, multi-path effect optimization and a real-time feedback mechanism, the positioning precision and stability of the air base station are significantly improved.

The invention provides a road unmanned inspection system and inspection method based on multi-modal perception and a large model. The system comprises a vehicle end system used for multi-modal data acquisition, automatic driving control, real-time perception fusion and edge reasoning of a lightweight large model; the cloud platform is used for cross-modal depth identification, disease knowledge base management, GIS visual display, inspection task management and large model training iteration; the scheduling end is used for task issuing, result auditing, and visual interaction of human-aided decision making and road health assessment. On the basis of the three-layer architecture, a large model collaboration framework is further constructed, and the framework runs across a vehicle end, a cloud end and a scheduling end, is responsible for reasoning collaboration, intelligent supplementary shooting, task priority generation, structured report generation and interpretable reasoning chain construction of a multi-mode large model, and is a key mechanism for realizing closed-loop routing inspection of an intelligent collaboration system.

The invention relates to the technical field of gear grinding machining, in particular to a diamond roller design method for composite grinding process grinding wheel dressing, a diamond roller and a grinding wheel dressing method.The method comprises the steps that tooth profile parameters of a to-be-machined gear are obtained, and the original theoretical profile of the diamond roller is calculated based on the tooth profile parameters; thinning the original theoretical profile to obtain parameters of a first profile section; calculating parameters of a second profile section based on the parameters of the first profile section, and calculating parameters of a third profile section based on the parameters of the second profile section; and the first profile section, the second profile section and the third profile section are sequentially connected in the radial direction of the diamond roller to obtain the diamond roller composite profile. The device has the beneficial effects of being convenient to machine and high in machining efficiency.

The application discloses a kind of gas pollution source detection traceability system, it is related to gas pollution source instantaneous discharge traceability detection technical field;The present application determines target position by extracting the abnormal position in traceability signal, determines the detection route with target position as starting point, matches unmanned aerial vehicle for each route to collect pollutant concentration and collect environmental data, then the compensation amount is corrected pollutant concentration by matching collected environmental data, concentration distribution map is constructed and diffusion main shaft and diffusion time are determined, and the distance of emission source is calculated to lock the suspected position, finally, the real pollution source is obtained by verifying the suspected source through CFD model;In the technical scheme, the pollution area can be covered without dead angle by multi-unmanned aerial vehicle and other angle partition detection, and the concentration data is ensured to be complete and continuous;CFD model verification greatly improves the positioning accuracy of pollution source, shortens the response time of traceability in the instantaneous discharge scene, reduces the positioning error, provides key technical support for rapid disposal of leakage and reduction of pollution diffusion.

The utility model discloses a kind of infinitely variable gearbox body combination tooling fixtures, including basic support module, one sequence blank positioning and clamping module and two sequence semi-finished product positioning and clamping module, one sequence blank positioning and clamping module is used to position and clamping to one sequence box body blank, two sequence semi-finished product positioning and clamping module is used to position and clamping to semi-finished product box body after completing one sequence processing, basic support module simultaneously carries one sequence blank positioning and clamping module and two sequence semi-finished product positioning and clamping module;One sequence blank positioning and clamping module is composed of adjustable support column, three groups of pressing plate, lateral jackscrew, anti-vibration clamp plate, mistake-preventing limiting column and positioning pin, complete rough machining;Two sequence semi-finished product positioning and clamping module utilizes the support seat of eight with M8 thread hole of top plate even distribution, semi-finished product flange edge is compressed by M8 bolt, continue finish machining.The combination tooling fixture of the utility model, two sequence processing can be continuously completed in one clamping of same fixture, reference is unified, production efficiency is greatly improved.

The application discloses a kind of gas-liquid two-phase leakage ultrasonic safety detection method and device, it is related to mechanical engineering and nondestructive testing technical field, the method includes: deployment multichannel ultrasonic sensor array;Dynamic noise baseline based on adaptive Gaussian mixture model is constructed;Extract amplitude attenuation rate, center frequency offset and other multidimensional acoustic characteristics and calculate difference vector;Combining dynamic threshold and multi-probe time delay-amplitude information carries out leakage preliminary judgment and positioning;Through convolution-long short-term memory hybrid neural network, identify leakage mode and implement three-level risk early warning according to leakage rate.The system is composed of multichannel ultrasonic sensor array, signal processing module, feature extraction unit, positioning solution module and intelligent early warning engine.The application can realize high sensitivity detection, strong working condition adaptability, accurate positioning and quantification and closed-loop intelligent response, significantly improve the intrinsic safety level of gas-liquid two-phase flow system.

The utility model discloses a kind of radar material level meter automatic detection mechanism, it is related to the technical field of calibration measurement, including darkroom and radar material level meter, the darkroom one end outer wall is connected with mounting plate, the darkroom is co-opened with the communicating hole for installing and placing radar material level meter with mounting plate, the movable reflector plate is provided in the darkroom, range finder is installed in the darkroom located radar material level meter one side outer wall, measuring hole is opened in the darkroom for range finder measurement use, the bottom of the darkroom is equipped with the seventh axle track, supporting frame is slidably connected on the seventh axle track. The utility model is set by PLC Test distance, can accurately position the position of reflector plate, reduce the positioning error caused by human factor, improve the precision of ranging detection, increase manual range finder, after reflector plate moves to specified position, manually click range finder calibration current reflector plate distance accuracy, further ensure the reliability of detection data.

This utility model discloses a multi-station turning machining center for shaft parts, relating to the field of lathe machining technology. It includes an operating table with a switching mechanism on its top. The switching mechanism includes a switching disc, a support frame, and a drive assembly. In this utility model, the top of an electric push rod two is fixedly connected to a limiting frame. Electric push rod one drives the support frame to move, and electric push rod two drives the limiting frame to move. The top of the limiting frame engages with the switching disc and an auxiliary plate, respectively. The limiting frame and auxiliary plate limit the switching disc. The drive assembly drives the switching disc to rotate, enabling the switching of work positions for the parts. This facilitates machining of parts in different positions without re-clamping, reducing positional errors and ensuring the machining effect. The bottom of clamping block one engages with clamping block two, achieving clamping and limiting of the parts, reducing loosening during machining. A fan reduces the accumulation of debris on the top of the switching disc.

The utility model relates to a kind of plate stitch welding support structures, belong to plate stitch welding support technical field.The plate stitch welding support structure, including: support frame, the top of the support frame is fixedly installed with two welding tables;Welding fixed mechanism, for the fixed support welding of plate the welding fixed mechanism is set on the side of welding table;Wherein, the welding fixed mechanism includes fixed installation in the support frame one side's bidirectional pump, the side of the bidirectional pump is provided with fixed assembly, the side of two welding tables is provided with support assembly;Fixed assembly can form negative pressure adsorption to the bottom surface after plate is placed to welding table, without additional configuration block can quickly, stably fixed plate, reduce before welding preparation, reduce displacement and positioning error, improve welding accuracy and efficiency;Support assembly supports and guides plate when fixed assembly does not work, facilitate smooth movement and position fine adjustment, improve station turnover and operation convenience.

The utility model discloses a built-in single Beidou high-precision positioning module of a mobile terminal, which comprises a Beidou special-purpose antenna unit, a radio frequency front-end processing unit, a radio frequency front-end processing unit, a radio frequency front-end processing unit, a radio frequency front-end processing unit and a radio frequency front-end processing unit, wherein the Beidou special-purpose antenna unit adopts a right-handed circular polarization microstrip antenna structure and is integrated inside the mobile terminal for receiving Beidou satellite signals; comprising a low noise amplifier, a multi-frequency-point filter and an analog-to-digital conversion module, the multi-frequency-point filter supports signal separation and anti-interference processing of Beidou B1, B2 and B3 frequency bands, a baseband processing unit, a built-in single Beidou signal demodulation chip, supports multi-frequency-point joint calculation of a Beidou third satellite, and integrates an adaptive anti-multipath interference algorithm and a power management unit, and the analog-to-digital conversion module is connected with the baseband processing unit. A dynamic voltage regulation technology is adopted, power supply voltage is switched according to a positioning mode, and a dormant state is entered when no positioning requirement exists; according to the utility model, by optimizing a hardware architecture and an algorithm, high-precision, low-power-consumption and miniaturized design is realized.

The application provides an underground tunnel crack repairing intelligent drilling device, a mechanical arm and a method, relates to the field of underground intelligent repairing equipment, and aims to solve the problems of low intelligence degree and easy damage of a detection assembly caused by drilling impact during drilling of a crack in an underground project. A matched detection assembly is arranged on a drilling assembly, crack state parameters can be collected during drilling, and auxiliary positioning can be performed. The detection assembly is installed on a support plate through a sliding pair with a resilient piece. When vibration occurs during construction, part of the vibration can be absorbed by the resilient piece. The direction of action of the resilient piece is consistent with the drilling direction, so that the impact effect generated during drilling is improved, and the detection equipment is protected.

The invention discloses a multi-point leakage current synchronous detection and positioning method and a multi-point leakage current synchronous detection and positioning device. The device comprises a multi-branch three-phase leakage current detector arranged at a wire outlet end of a distribution transformer or a key branch node, a user side leakage current detector arranged at a terminal user wire inlet position of a suspected electric leakage branch, and a signal injection unit integrated in the multi-branch three-phase leakage current detector or the user side leakage current detector. The multi-branch three-phase leakage current detector is used for calculating the residual current of each branch in real time, the user-side leakage current detector is used for calculating the user-level residual current, and the signal injection unit is used for actively injecting a test signal at a branch node so as to trigger wave propagation; wherein the multi-branch three-phase leakage current detector is a master station; the user side leakage current detector is a substation; the system has the beneficial effects of high-precision positioning, quick response, strong interference resistance and expandability.

The invention belongs to the technical field of artificial intelligence and information, and particularly relates to a media data acquisition method and system for constructing a space-time knowledge tree based on prompt engineering. The system comprises a prompt engineering module, a common knowledge tree construction module, a space-time knowledge tree construction module and a media data acquisition module, wherein the prompt engineering module provides a prompt word template; the common knowledge tree construction module constructs a common knowledge tree through large language model reasoning; the space-time knowledge tree construction module is used for calling a place refining cue word template and a facility refining cue word template based on a common knowledge tree, and constructing a space-time knowledge tree through large language model reasoning and multivariate geographic information verification; and the media data acquisition module generates a multi-dimensional retrieval condition and drives a data acquisition engine to acquire data. According to the method, automatic construction and dynamic expansion of a knowledge tree are realized by utilizing large model reasoning and a controllable prompt strategy, and crawlers are driven to accurately retrieve in multiple dimensions, so that accurate capture of high-value data and reliable tracking of evolution clues are realized.

The invention discloses a machining device applied to machine tool equipment, the machine tool equipment and a machining method.The machining device comprises a cradle rotary table movably installed on a machine tool body of the machine tool equipment, the cradle rotary table comprises a rotary table body and a first rotating part which are connected with each other, and the cradle rotary table is used for bearing a workpiece; the first rotating part is movably connected with the side wall of the bed body; the tool magazine comprises a plurality of tool clamping claws mounted on the first rotating part, and the tool clamping claws are used for mounting tools; the first driving assembly is used for driving the cradle rotary table to rotate around a first rotating shaft, and the first rotating shaft extends in the horizontal direction; and the main shaft assembly is used for machining the workpiece. In this way, high-precision tool changing can be achieved, and the machining cost is reduced.

The utility model discloses a device of reinforcing bar spacing control relates to reinforcing bar spacing control field, including the measuring frame, the inside rotatory connection of measuring frame has two -way screw rod, both sides of two -way screw rod's outer surface all rotatory connection has the screw part, the lower extreme of screw part is provided with the positioning assembly, and the inside of screw part and measuring frame mutually sliding plug -in. The utility model adopts above -mentioned structure, and the scale on both sides of the measuring channel of measuring frame upper end measures, can intuitively read the distance between both sides screw part, thereby completes the spacing measurement between reinforcing bar, realizes both sides positioning assembly synchronous regulation through two -way screw rod drive, need not adjust respectively, and the positioning and measurement time are greatly shortened, and the operation complexity is reduced, and the high measurement precision of screw regulation, and two -way screw rod transmission displacement is stable, and the accurate scale of cooperation scale can reduce manual positioning and reading error, and ensure that the measurement result is accurate.

The application relates to a laser radar SLAM and vegetation feature library matching method and system of a mowing robot, and relates to the technical field of data processing. The method comprises the following steps: determining initial laser radar parameters based on laser radar test data of a plurality of sample vegetation; establishing a vegetation feature library based on the initial laser radar parameters and the laser radar test data of the plurality of sample vegetation; determining environmental influence factors based on the initial laser radar parameters; acquiring real-time environmental information of the mowing robot; adjusting the initial laser radar parameters based on the environmental influence factors and the real-time environmental information to generate current laser radar parameters; acquiring point clouds of vegetation to be matched based on the current laser radar parameters; determining a vegetation type based on the point clouds of the vegetation to be matched and the vegetation feature library; and updating a two-dimensional grid map or a three-dimensional point cloud map of an environment where the mowing robot is located based on the point clouds of the vegetation to be matched and the vegetation type, so that the intelligent level of the mowing robot is improved.

The invention relates to a cable insulation fault positioning method and system, and the method comprises the following steps: collecting a three-phase voltage traveling wave signal when a cable has a single-phase insulation damage grounding fault, and carrying out the signal decoupling, and obtaining an independent line mode component and a zero mode component; a Db45 wavelet basis is used as a mother wavelet, multi-scale wavelet decomposition and reconstruction are carried out on the decoupled line mode component so as to extract fault traveling wave head features, and the number of layers of multi-scale wavelet decomposition is determined according to the sampling frequency and the power grid fundamental wave frequency; and according to a wavelet reconstruction result, detecting the moment when a fault traveling wave head arrives at monitoring points at two ends of the line, thereby calculating the distance from a fault point to one end of the line. Compared with the prior art, the method has the advantages that inter-phase coupling interference is eliminated through phase-mode transformation, and serious voltage distortion and harmonic interference in a power grid are effectively suppressed by using the excellent time-frequency localization characteristic of the Db45 wavelet basis, so that the accuracy and reliability of cable insulation fault positioning are greatly improved.

The utility model discloses a kind of double-layer corner brace for framework bed and framework bed, including upper support plate, lower support plate and two connecting plates, the upper support plate and lower support plate are arranged in parallel up and down;Two connecting plates are perpendicular to each other, and located between upper support plate and lower support plate, the two sides of upper support plate and lower support plate are integrally connected with two connecting plates respectively.The utility model can reduce the positioning error generated in installation process, improve the connection strength and stability of bed frame structure whole, improve artificial efficiency.