347results about How to "Quick layout" patented technology

The invention relates to a tilt rotor aircraft adopting parallel coaxial dual rotors, which comprises a fuselage, wings, an empennage, a pitch control scull system, a landing gear, a power and fuel system, a transmission system, a rotor system, a rotor nacelle and a tilt system, wherein the wings are arranged at the center section of the fuselage; the empennage and the pitch control scull system are arranged at the tail of the fuselage; the landing gear is positioned at the belly of the fuselage; the power and fuel system is arranged inside the center section of the fuselage and is connected with the rotor system and the pitch control scull system through the wings and the transmission system in the fuselage; the rotor system is arranged on the rotor nacelle at the tip of the wings; partial wing which is fixedly connected with the rotor nacelle and simultaneously can tilt is arranged at the inner side of the rotor nacelle; and the tilt system is arranged in the wings and is connected with the rotor nacelle and the partial wing which can tilt. The tilt rotor aircraft is mainly characterized by adopting the pitch control scull system, the parallel coaxial dual rotors and the partialwing which can tilt to realize flight status transformation and conventional taxiing and landing, thereby improving the forward speed and the propulsive efficiency.

The invention discloses an intelligent positioning method of mine microquake sources, which is a microquake resource intelligent positioning system which comprehensively considers various influencing factors and targets, and integrates with sensors distribution-noise wave filtration-microquake source positioning analysis-three-dimensional display in to a whole. The method realizes the real-time analysis and the forecast of the incubation, the development and the occurrence of mine underground geological disaster through a self-developed procedure, solves the defects that the traditional sensors distribution method is not systematic, the noise wave filtration is incomplete, the microquake wave speed model is not exact and the positioning method is easily diffused, and has the characteristics of friendly operation interface, good noise wave filtration performance, exact, convenient and fast microquake source positioning analysis, visual and pictorial result display, and wide application range. The method has wide application value in the fields of mineral engineering, water conservancy and electric power engineering, petroleum engineering, soil engineering and underground engineering and the like.

The utility model discloses a robot navigation system and a navigation method. The robot navigation system comprises a navigation network which is formed by a plurality of wireless access points, a wireless communication module which is used for transferring data and collecting the intensity sequence communicated with the wireless access points, a sensor which is used for checking that the robot meets barriers or not, and a position server which is used for storing the referenced intensity sequence and running the intricate position arithmetic, and is characterized in that the position server is connected with the wireless communication module and interacts with the navigation network. The navigation method is characterized in that the robot judges the next target position until reaches the destination by comparing the intensity sequence collected in real time with stored reference intensity sequence of the position points; when the robot meets barriers, the robot records and demarcates the intensity sequence of the position in order to avoid entering the position again, therefore achieving intellectual learning; the robot can upload the correlative information to the position server and achieve the assistant navigation position by the help of the database of the position server and the position arithmetic. The utility model is not likely to be affected by the environment and also has the advantages of low cost of maintenance.

The invention discloses a J2EE framework based enterprise-level visualization application development platform. The platform comprises a model design unit and a code generation unit, wherein the model design unit carries out visualized modeling on a system service based on a development framework and a user interface template which are selected by a user, and the code generation unit generates a basic service code matched with the development framework and the user interface template which are selected by the user based on the visualized modeling. According to the scheme, modular applications which are customized or downloaded and updated by the user can be published and arranged quickly, and the time spent on developing and introducing external data of the user is greatly shortened. According to the scheme, a development framework and databases which are independently selected by the user can be applied, data migration between the databases is carried out freely, and cross-framework and cross-database application development of the user is facilitated. Through the scheme disclosed by the invention, standardization, modularization, automation and platformization of the development platform can be improved, the overall risk and the cost of a project are reduced, the range of knowledge of most developers in the market can be met, and the learning cost is reduced to the maximum extent.

The invention relates to a monitoring technology for the aquaculture environment of fresh-water fish and discloses a monitoring system for the aquaculture environment of the fresh-water fish on the basis of a wireless sensor network. The monitoring system comprises cluster head nodes connected with i nodes, wherein k cluster head nodes are connected with collecting nodes; m collecting nodes are connected with a monitoring center; and all i, k and m are natural numbers. The monitoring system is characterized in that the nodes, the cluster head nodes and the collecting nodes are configured with a water temperature sensor, a dissolved oxygen sensor, an aerator, a node processing module and a wireless transmission module. The collecting nodes also comprise an atmospheric pressure sensor, a PH value sensor and a communication module; the atmospheric pressure sensor, the PH value sensor and the node processing module are connected; and the communication module is connected with the wireless transmission module and is used for transmitting data to the monitoring center and receiving an instruction. The monitoring system disclosed by the invention can realize large-range wireless monitoring network layout, and is very suitable for automatic control of large-scale fresh-water aquaculture.

The invention discloses a tunnel boring machine rock breaking seismic source three-dimensional seismic advanced detection device and method. The device comprises a seismic source sensor array, a receiving sensor and a supporting device thereof, a noise sensor, and a multichannel seismic wave data collecting instrument, wherein the multichannel seismic wave data collecting instrument is connected with the seismic source sensor array, the receiving sensor and the noise sensor and receives seismic wave signals and noise signals of a noise source. Aiming at the special situation of the construction tunnel of a tunnel boring machine, the device adopts a seismic source signal blind source separation method based on an independent component analysis theory, a seismic source signal reconstruction method and a method for performing powerful interference signal degeneration on receiving sensor signals to finally obtain geological conditions in front of a working surface of the tunnel boring machine and the surrounding rock mass of a tunnel and corresponding mechanical parameters, can realize the advanced prediction of geological anomalous bodies, can further be used for evaluating the quality of surrounding rocks of a region to be excavated, and provides reference for the optimization of tunnel boring machine operating parameters and guarantee of construction safety.

The invention discloses a carrying device of three advance geology forecasting instruments on a TBM (Tunnel Boring Machine). The carrying device comprises a transmission supporting and shock absorption device, a telescopic transmission system and an instrument cabin protection device, wherein the transmission supporting and shock absorption device is convenient for carrying power supplying / measuring electrodes, and installing seismic wave vibration exciters and a seismic wave sensor on a TBM cutter disk; the telescopic transmission system is convenient for carrying an oblique single-hole geology radar transmitting and receiving antenna above a TBM rear support; the instrument cabin protection device plays a protection role when the TBM is in boring operation and is convenient for carrying an instrument cabin controlling the whole detection work at the inner part of the TBM rear support. According to the carrying device disclosed by the invention, the integration of detection instruments and the TBM is realized, the detection space and the detection time of a full-face excavation tunnel are fully utilized, the detection instruments are automatically and quickly distributed on a working surface of the TBM, an advance detection hole is drilled, the three advance geology forecasting instruments are successfully carried, the detection efficiency of advance geology forecasting and the automation and rapidity level are increased, and the advance geology forecasting capacity of the TBM is obviously enhanced.

The invention discloses a three-dimensional wave velocity imaging measurement-while-drilling method and device for rock in front of the tunnel face. Before an advanced geological drilling rig works, earthquake wave receiving sensors are rapidly arranged on the tunnel face and the tunnel lateral face; a loop-line combined three-dimensional observation mode is adopted, and according to the data fed back through a drilling depth sensor in real time, the running mode of a drill rod of the advanced geological drilling rig and the drilling mode of a drill bit are automatically switched at the right moment through a drilling rig control system; earthquake source signals are collected in real time through a pivot sensor, noise signals are collected in real time through a noise sensor, and earthquake waves are collected through the earthquake wave receiving sensors in real time. By means of the device, the distribution condition of unfavorable geologic bodies in front of the drilling portion of the advanced geological drilling rig and the distribution condition of unfavorable geologic bodies around a tunnel can be obtained, the rock in front of the drilling portion can be accurately assessed, the quality level of the rock in front of the drilling portion can be predicted, the unfavorable geologic bodies in front of the tunnel face can be found in time, a construction scheme can be optimized accordingly, and use reference can be provided for guaranteeing the tunnel construction safety.

The invention discloses a monitoring equipment layout method and device and belongs to the field of monitoring. The method comprises: establishing a two-dimensional coordinate system according to basic data input by a user, and receiving a region that needs to be monitored, which is divided by a user, through the two-dimensional coordinate system; converting two-dimensional coordinate data in the two-dimensional coordinate system into three-dimensional coordinate data; calculating a region covering range of the region that needs to be monitored, an actual scene and a horizontal coverage area of the region that needs to be monitored; screening at least one group of monitoring equipment meeting rules from a pre-set specialist rule base according to the region covering range of the region that needs to be monitored, the actual scene and the horizontal coverage area of the region that needs to be monitored; determining the conformity of each group of the monitoring equipment in the screened monitoring equipment group, and determining an optimal monitoring equipment group; and calculating an optimal monitoring layout scheme of the optimal monitoring equipment group. With the adoption of the monitoring equipment layout method and device, the optimal layout scheme can be rapidly, directly and accurately simulated, so that the excessive dependence on the technological level and experiences of constructors is avoided; and the quality of projects can be ensured and the layout efficiency can be improved. Moreover, the monitoring equipment can be sufficiently utilized and the cost is saved.

The invention provides a field programmable gate array chip layout method. The method includes providing structural information of a logic unit of a field programmable gate array chip and net list information, generated after packaging, of a logic module; establishing a wiring resource map according to the structural information of the logic unit of the chip; arranging the field programmable gate array chip according to the net list information and the wiring resource map, and quickly wiring simultaneously. By the method, quick wiring is realized in the overall arrangement process according to the wiring resource map, and overall arrangement and wiring are closely combined, so that wiring success rate is increased, time delay of a circuit is reduced, and wiring resource utilization rate is increased.

The invention relates to the field of basic community medical institution combined construction, and proposes a package solution for basic community medical institution combined construction. The package solution for community medical institution construction with the design of the medical building module equipped with basic equipment and the design of the information management system of a supporting community medical institution is provided. The medical building module designed through the design method can be built in a factory from the aspect of the hardware environment of the medical institution, is installed and combined in the field, has the advantages of high degree of standardization and high cost-effective performance, and is widely used in the fields of basic community medical service, pension, field medical service and national defense construction.

The invention provides a three-dimensional automatic wiring method and a three-dimensional automatic wiring device based on a rapidly-exploring random tree. The three-dimensional automatic wiring method comprises the following steps: according to an available space, a starting point and a finishing point of a cable to be arranged to obtain an initial path of the cable to be arranged; detailing the initial path to obtain a middle path; through a cable physical model, modeling the middle path to determine a final path of the cable to be arranged. Through the three-dimensional automatic wiring method and the three-dimensional automatic wiring device, cable arrangement can be achieved easily, rapidly and accurately.

The invention discloses a digital manufacturing method for light permeable concrete. The method comprises the following steps that the density, array modes and patterns of optical fibers are designed through computer aided software; light guiding fibers are fixed to two optical fiber substrates in a penetrating-inserting mode through a braiding mechanism and a wire drawing mechanism, and different arrangement modes and separation distances of the optical fibers are achieved through stepping displacement of the two assembled optical fiber substrates; the optical fibers in certain lengths are reserved, the upper optical fiber substrate and the lower optical fiber substrate are separated after optical fiber arrangement is completed, and the near optical fibers are bonded into bundles through a binder so as to improve the mechanical strength of the optical fibers and protect the surfaces of the optical fibers; and the optical fiber substrates with the optical fibers arranged in advance are placed in a mold for concrete pouring and forming, and then cured to the demolding period, and the optical fiber substrates and the superfluous optical fibers are ground to obtain the light permeable concrete. The computer numerical control technology is firstly adopted for the optical fiber arrangement process of the light permeable concrete, and automatic rapid production of the light permeable concrete can be achieved.

The invention discloses a building indoor energy-saving detection point marking method based on an infrared image. The building indoor energy-saving detection point marking method based on the infrared image comprises the steps of shooting the infrared image, splicing the infrared image, setting a detection body, dividing temperature zones, generating an isothermal chart, establishing column diagram distribution, selecting large temperature zones as marking positions of detection points, and selecting and determining the detection points according to the isothermal chart and the infrared image of the detection body. The building indoor energy-saving detection point marking method based on the infrared image is applied to indoor analysis and detection of a building, capable of accurately select the positions of building energy-saving detection points of an indoor wall, flexible and simple in operation, visual and differentiable in identification effect, and capable of storing detection results and carrying out the analysis repeatedly. The building indoor energy-saving detection point marking method based on the infrared image can be used as a processing and analysis method of the indoor wall in the building energy-saving detection process and can also be used as the direct basis for placing a temperature gauge and a heat flow meter.

The invention relates to a multi-sensor arrangement device for temperature and humidity detection and calibration of a constant-temperature constant-humidity box, a stand column is arranged on a base,a supporting seat is arranged on the stand column in a penetrating mode, the supporting seat can slide up and down along the stand column, the supporting seat fixedly connected with the stand columnby a jackscrew, a plurality of rotating shafts are arranged on the supporting seat, one ends of cantilevers sleeve the rotating shafts, the cantilevers can rotate horizontally relative to the rotatingshafts, the cantilevers can be fixedly connected with the rotating shafts by jackscrews, the cantilevers are telescopic cantilevers, the other ends of the cantilevers are hinged to one ends of extension arms, the extension arms are telescopic extension arms, the other ends of the extension arms are hinged to one ends of connection blocks, the other ends of the connection blocks are hinged to sensor supports, and mounting holes used for mounting temperature sensors and humidity sensors are formed in the sensor supports; multi-layer multi-point arranged sensors can be arranged in the constant-temperature constant-humidity box at one time, the rapid arrangement of the sensors can be realized when the constant-temperature and constant-humidity box is calibrated, the calibration efficiency canbe effectively improved, the labor intensity is reduced, and the accurate calibration result is ensured.

The invention provides a stepwise indoor three-dimensional positioning method for use in a multi-floor environment, and relates to the field of indoor positioning. Three-dimensional positioning is finished through the two steps of floor positioning and plane positioning according to stepwise and dimension reduction thoughts, and accurate positioning of an MT (Mobile Terminal) is realized through a positioning method based on a TDOA (Time Difference of Arrival). The method comprises the following steps: firstly, judging a symbol of a measured value through a judgement mechanism to finish floor positioning of the MT and determine a floor on which the MT is positioned; and then, performing plane positioning on the MT to fulfill the aim of determining the position of the MT. Compared with the prior art, the method has the advantages that three-dimensional positioning of an unknown MT is realized; positioning APs (Access Points) are arranged easily and rapidly; a positioning principle is simple; the positioning accuracy is high; the positioning complexity is low; a database does not need to be pre-established for a multi-floor building to be positioned; a positioning process is simplified; and the portability is high. The method can be applied to various positioning applications of floor information and position information.

The invention discloses a multiple-input multiple-output imaging antenna layout method of a close-distance planar array. The method comprises the steps that firstly, the size of a shortest effective composite array of an imaging system and the size of a planar array element antenna are determined; secondly, the minimum distance between similar receiving and transmitting antenna centers is determined; thirdly, the total number of receiving and transmitting antenna elements of a minimum composite array of the imaging system and the size of the minimum composite array are determined; fourthly, the number of total receiving and transmitting array elements of the imaging system, the number of antenna equivalent phase centers of the imaging system and the size of the planar array of the imaging system are calculated; fifthly, the distribution of the geometrical center positions of the transmitting and receiving array element antennas of the imaging system is calculated; sixthly, the layout is carried out according to the distribution of the geometrical center positions of the transmitting and receiving array element antennas of the imaging system. According to the layout method, the problem that in the planar array MIMO imaging, the length of the effective composite array is affected by the observation distance is solved, and on the premise of guaranteeing the quality of close-distance microwave images, the data acquiring efficiency is further improved.

The invention relates to a robot joint and a robot. The robot joint includes an electromagnetic brake, a brushless motor, an input flange, a harmonic reducer, an output flange and a torque measuring device which are coaxially arranged in sequence, wherein a braking coupling of the electromagnetic brake, a motor spindle of the brushless motor and a wave generator of the harmonic reducer are coaxially connected in sequence; a flexible wheel of the harmonic reducer is connected with the output flange; the torque measuring device is integrated to the output flange. The joint has a hollow wire holethat runs axially through the joint and that is used for wiring.

The invention provides a visual page processing method and device, computer equipment and a storage medium. The method comprises the steps of providing a visual editing interface; obtaining a dragginginstruction, obtaining page elements dragged from the layout area to the operation area according to the dragging instruction, and obtaining page parameters of the page elements in the operation area; obtaining a selection instruction for the page elements in the operation area, and displaying an attribute editing interface in response to the selection instruction; obtaining an attribute editinginstruction in the attribute editing interface, and obtaining attribute information of the page elements; and generating a page code of the operation area according to the page element of the operation area, the page parameter of the page element and the attribute information of the page element, and storing the page code. A user can operate in the visual editing interface, determine page elementsand page parameters, pop up an attribute editing interface used for editing attributes in the operation area to obtain attribute information, and generate page codes according to the page elements, the page parameters and the attribute information, so that rapid page layout is realized.

The invention provides an indoor floor positioning method based on TOA (Time Of Arrival), and belongs to the field of positioning technology. The floor position of an MT (Mobile Terminal) to be solved can be pre-estimated according to the floor number of a positioning AP (Access Point) by controlling the transmitting power of the AP, and then the MT floor position solved by a specific algorithm is corrected to realize floor positioning of the MT to be solved, wherein a few positioning APs are adopted, so that the burden of the system is reduced, and the positioning cost is lowered; the positioning APs are arranged simply and quickly and are simple in positioning principle and high in positioning accuracy, so that the difference of transceiver gains does not need to be considered, the physical requirement for a transceiver antenna is reduced, the positioning complexity is low, a database does not need to be pre-established for a multi-floor building to be positioned, the positioning process is simplified, the portability is high, and the method can be combined with various different plane positioning methods to realize three-dimensional spatial positioning of a target to be positioned.

The invention provides a method for manufacturing femtosecond laser complex components in a large batch. The surface processing of the complex component comprises: setting, according to the area and the focal depth of a laser processing region, a constraint condition and a region growing algorithm by using a complex component model reconstruction and surface processing pattern splicing algorithm;dividing the processing region, simplifying the region boundary to obtain the processing region, extracting the key features of the processing pattern types and layout features; designing a slicing algorithm according to the process of periodic and non-periodic layout in order that the processing pattern is automatically and quickly laid out on the surface of the complex component; by using the processing region division and pattern segmentation algorithm and setting the element type and combination in the processing pattern, obtaining the intersection of the element and the processing regionboundary and classifying the sub-pattern to the corresponding processing region; by using processing pattern real-time detection and online splicing manufacturing technology and by setting and installing a high-precision CCD camera, obtaining the video image of a processed part, recognizing the boundary of the processed pattern in real time based on an image processing algorithm, and then according to the boundary information of the pattern to be processed, predetermining the registration error of the two processing patterns, obtaining a required correction transformation parameter, and achieving online splicing manufacture in a laser processing process.

The invention relates to an infiltration technique and device. The technique comprises three phases, namely infiltration preprocessing, infiltration processing and infiltration postprocessing. The infiltration device comprises an infiltration basket, a hoist hook, a degreasing pot, a cleaning pot, a centrifugal pot, a baking oven, an infiltration pot, a vacuum pump, a glue storing pot, an air compressor, a washing pot, a solidifying pot and a pressure test device, wherein all the components are arranged in a straight line. Due to the fact that the infiltration pot is cylindrical, influence of sewage on a production site can be effectively avoided. Due to the fact that the infiltration pot is locked with a method that a sealing lock ring is inflated by a lock ring cylinder and both a toothed ring of a pot cover and the lock ring are manufactured with whole materials, sealing performance is good, operation is safe and fast, the pot cover can be opened and closed automatically and fast, no relative motion exists between the pot cover and a sealing ring, friction does not exist, opening is flexible, and the service life is long. The infiltration technique and device have the advantages that the device is compact and reasonable in structure, the whole production site is beautiful, logistics is smooth, and fixed location management and civilization and cleanliness of the production site can be ensured.

The invention discloses a car networking virtual reality theme park display system and method, and belongs to the field of virtual reality. The defects that an existing theme park is poor in still life display degree and fidelity, large in occupied area, not capable of using land resources simultaneously, long in exhibition arrangement time and large in work amount are overcome. The car networking virtual reality theme park display system is technically characterized by comprising a virtual reality helmet, a model server and a vehicle data communication network; an OLED display screen and a tracking device for head tracking are integrated inside the virtual reality helmet, and the virtual reality helmet is connected with the model server; the model server stores a theme scene of a theme park and a 3D model of a virtual object located in the scene.

The invention belongs to the technical field of digital image processing and pattern recognition, and particularly relates to a method for judging a road vehicle jam based on a finite-state machine (FSM). The method comprises the following steps of establishing an FSM model according to GA115-1995 road traffic jam standard and combining with a forming process of an urban road jam, capturing a traffic road image by using a high-definition camera, estimating length and an overall speed of a vehicle queue on a motorway in the image, activating a trigger condition in the FSM according to limitations of the motorway to capacity and speed of vehicles, and judging whether the current road condition is in a jam state or not. Compared with traditional method, the method disclosed by the invention comprehensively considers the forming process of the urban road traffic jam, can dynamically detect the generation and the dissipation of the traffic jam in real time, and supplies an effective basis for traffic management to relevant departments.

The invention discloses a prefabricated-base communication pole tower which comprises a plurality of tower sections. The tower sections are sequentially connected from top to bottom to form a pole body, a communication antenna is arranged at the top of the pole body, a prefabricated base is arranged at the bottom of the pole body and comprises a base body and a connecting seat fixed to the bottom of the pole body, a plurality of fixing holes are formed in the connecting seat, fixing blocks penetrating the fixing holes are arranged on the base body, and a wedge block positioned with the connecting seat is arranged on each fixing block. The prefabricated-base communication pole tower is higher in mounting convenience and less in mounting time.

The invention discloses a detection apparatus having a rapid detection function for a transient surface wave of a hard surface. The detection apparatus comprises a detector coupled with a hard surface rapidly to carry out data collection and a rapid arrangement device for arranging the detector. The detector includes a pedestal, a sensor element installed inside the pedestal, a connecting socket arranged at the top of the pedestal, and a coupling antenna arranged at the bottom of the pedestal; and a spherical structure is formed at the bottom of the coupling antenna. The rapid arrangement device includes two triangular-pyramid supports, a cross bar erected between the two supports, and elastic pins installed on the cross bar; metal rings with suspenders are arranged on the elastic pins; and the suspenders and connecting rings arranged at the top of the detector are detachably connected. According to the invention, rapid coupling of the detector and the hard surface is realized; arrangement time of the detector is substantially saved; and the working efficiency and precision of transient surface wave detection of the hard surface are improved.

The invention relates to an efficient high-precision white vehicle body static stiffness measurement system and a test method. The measurement system comprises a front suspension constraint support device, a rear suspension constraint support device, a pre-support device and a servo loading system, the X-Y direction position of the front suspension constraint support device is adjustable, and theheight and the left-right position of the upper front suspension support device are adjustable. The T-shaped table can rotate around the Z axis, the X-direction position and the Y-direction position of the rear overhang constraint supporting device are adjustable, the height of the rear overhang constraint supporting device is adjustable, the pre-supporting device is erected below a left thresholdbeam and a right threshold beam of a white vehicle body in a test, the height of the pre-supporting device is adjustable, and the servo loading system is used for bending loading or torsion loading of the white vehicle body. According to the invention, the body-in-white can be conveniently centered with the test bed after being hoisted and the posture of the body-in-white can be adjusted to be horizontal with the ground, so that internal stress generated in the installation process can be effectively avoided and the measurement result is more accurate.

The invention belongs to the technical field of unmanned aerial vehicles, and relates to a vehicle-mounted unmanned aerial vehicle net bumping recovery device which comprises stand columns, connecting rod type synchronization mechanisms, damping mechanisms, supporting arms, a recovery net, oscillating bars and a vehicle platform. The two supporting arms are symmetrically and obliquely fixed to the vehicle platform; the stand columns are vertically downwards fixed to the top ends of the supporting arms in the vertical direction. One connecting rod type synchronization mechanism is fixed to the top end of each stand column; each connecting rod type synchronization mechanism is composed of a mechanism main rod, a first oscillating arm and a second oscillating arm, wherein the first oscillating arm and the second oscillating arm are fixed to the two ends of the mechanism main rod through rotating shafts, and the first oscillating arm and the second oscillating arm are connected together through a connecting rod. The top end of each first oscillating arm and the top end of each second oscillating arm are each connected with one oscillating bar, and the recovery net is fixed to the ends of the four oscillating bars. A nose of an unmanned aerial vehicle rushes at the net face of the recovery net 6 in the direction from a vehicle head to a vehicle tail. Wings of the unmanned aerial vehicle generate pull force to the recovery net 6 and drive the oscillating bars 7 to move to transmit the force to the stand columns 1; at last, the damping mechanisms 3 connected with the stand columns 1 complete energy absorption, and the unmanned aerial vehicle is safely recovered.

The invention provides a method for measuring the swing angle and the pivot point of an engine flexible spraying pipe. The method includes the steps of creating a specific coordinate system, and installing a high-speed camera in the axial direction or the lateral direction; arranging characteristic identifications on the inner side or the outer side of the spraying pipe; calibrating the pixel size of the camera, and collecting continuous image data in the swing process of the spraying pipe through the high-speed camera; extracting pixel coordinates of characteristic points one frame by one frame, and obtaining characteristic displacement through converting; calculating the swing angle or the pivot point of the spraying pipe. According to the method, image collecting is carried out through the high-speed camera, rapid arranging can be achieved, implementing is convenient, and the arranging is not limited by space; in addition, as a non-contact measuring mode is adopted, the limitation of the response speed of a sensor in traditional contact type measuring is avoided, and the response speed is high; as the characteristic identifications are arranged on the inner side or the outer side of the spraying pipe and resolved in a plane conversion mode into different planes for resolving, a complex three-dimensional model does not need to be built, the measuring accuracy is high, and the calculation method is simple and convenient.

The method includes the following steps: 1. establishing 3D parameter model library of sedan chassis assembly via extracting the overall parameters of the parts, controlling the simplified model and variable and parameter design to realize the fast layout of sedan parts and the dynamic amending of basic structure sizes through amending corresponding parameters during assembling chassis; 2. determining the tree structure for sedan chassis assembling; and 3. determining the sedan chassis assembly assembling mode via organizing the overall chassis structure in from-top-to-bottom design mode and assembling parts in coordination point mode. The present invention can support and guide design well and raise the overall quality of sedan chassis product.