73results about How to "Overcoming positioning" patented technology

The invention discloses a COTDR (coherent detection based optical time-domain reflectometry) fused long-distance coherent detection brilouin optical time-domain analyzer which comprises a narrow-linewidth laser, two couplings, a microwave signal source, an electro-optic modulator, an isolator, a long-distance sensing optical fiber, an optical circulator, a 3 db coupling, a pulse modulator, an Er-doped fiber amplifier, a scrambler, a pulse signal generator, a balancing photoelectric detector, an electrical frequency spectrum analyzer, a data processing module and an acousto-optic modulator. According to the invention, the signal-to-noise ratio of BOTDA (brilouin optical time domain analysis) is improved by using a coherent detection method, a non-local effect of a BOTDA system is reduced in a double-sideband detection mode, and the sensing distance is more than 70 km under the condition of no light amplification such as raman; and according to the invention, the COTDR is fused to a coherent detection based BOTDA system, and the system can run in a breakpoint testing mode, so that the defect that the traditional BOTDA can not run when a sensing fiber has breakpoints and can not carry out positioning on breakpoints is effectively overcome, thereby enhancing the adaptability and practicability of the sensing system.

The invention discloses a personalized meta search engine based on user interest and a method for processing search results. The search engine comprises a user registration / login unit, a meta search result collecting unit and a personalized processing unit, wherein, the personalized processing unit achieves screening of search results, personalized ordering and establishment and renewal of a user interest model through a search result preprocessing module, a personalized ordering processing module and a user interest renewing module. The method comprises the following steps: establishing and initializing a user interest model and then logging in a server; distributing search words input by users in the format of each search engine required; converting returning results collected into a unified format, removing reprocessing and personalized ordering in sequence, and submitting to the users; and catching search results clicked by users, changing interest types and weight size and renewing the user interest model data. The invention has the advantages that the inquiry coverage and accuracy are high, and the method for processing search results can be used for searching engine in Internet.

The invention discloses an automatic liner bottom plate forming production line. The automatic liner bottom plate forming production line is characterized by comprising an electric control cabinet, and an automatic feeding machine, a blanking machine station, a long edge bender station, a short edge bender station, a four-corner forming machine station and a Z-shaped bender station arrayed in sequence; liner bottom plates are clamped and sequentially conveyed to all the stations through a quintuplet servo conveying manipulator, and the electric control cabinet is electrically connected with an air cylinder and / or a servo motor of each station as well as a servo motor of the quintuplet servo conveying manipulator. By the production line, the quintuplet servo conveying manipulator is adopted for conveying so that the defect that plates deviate and are not positioned accurately during conveying is overcome; due to total fixed conveying, space for free mobility of the liner bottom plates is decreased, liner bottom plate quality is stable, and takt time is short; the servo motors are adopted to adjust the liner bottom plates, so that rapidness and reliability in adjustment are guaranteed.

The invention discloses a method and a system for locating a moving target in a mine based on binocular CCD vision. The system for implementing the method comprises surface equipment and an underground device. The surface equipment comprises a base station controller, a location server, an Ethernet switch and a monitoring terminal. The underground device comprises a mine intrinsically safe base station and a wireless radio frequency identification tag. The method for implementing the system comprises the following steps: (1) using an RSSI algorithm to estimate the location of a moving target; (2) carrying out matching feature extracting and training on the wireless radio frequency identification tag of the moving target; (3) carrying out feature matching on images after sampling through an ORB algorithm; (4) using a binocular CCD vision sensor to stereoscopically calibrate the left and right images of the moving target; (5) getting an internal and external parameter matrix of the binocular CCD vision sensor, and calibrating the world coordinates of the moving target; and (6) carrying out location correction on the world coordinate information of the moving target, and getting the accurate location information of the moving target in a mine. The problem on how to accurately locate a moving target in a mine NLOS environment is solved. The reliability and robustness of the system are improved.

The invention discloses a space positioning system comprising at least three beacons and at least one positioning terminal. The beacons are distributed in to-be-localized space and are used for generating low-frequency electromagnetic fields. Each positioning terminal receives low-frequency electromagnetic fields generated by the multiple beacons and calculates a spatial position of the positioning terminal according to the received low-frequency electromagnetic fields generated by the at least three beacons. Meanwhile, the invention also discloses a space positioning method. Therefore, defects of high implementation complexity, high deployment cost, large positioning error, and delayed positioning information updating of the existing positioning scheme can be overcome effectively. On the basis of the low-cost scheme, the indoor large-range precise real-time tracking can be realized; the environment requirement is loose and no metal and magnetic interference exists; and applicability of the space positioning scheme in different environment scenes can be improved obviously.

Disclosed is a high-efficiency air filter scanning leak-detection device and method. The high-efficiency air filter scanning leak-detection device comprises an air duct system, an air flow conversion device, a detection platform, a two-dimensional scanning mechanism, a detection system and a control system. According to the high-efficiency air filter scanning leak-detection device and method, leak points can be accurately and rapidly positioned, the distribution of the leak points are timely displayed through a three-dimensional graph, and the standard requirements are met.

The invention relates to a digital fluid cylinder with transformer ratio feedback, belonging to fluid cylinder technology area, especially feedback control technology of self-feedback digital driving hydraulic cylinder. As the piston of fluid cylinder moves in high speed and locates precisely. Feedback bar 7 in fluid cylinder is divided into feedback bar of piston 7-1 and feedback bar of control valve 7-2 and at one end of the feedback bar of piston 7-1 transmission 6 is set. Clutch 13 is set at one end of the feedback bar of controller 7-2 and set at the position where the clutch 13 is joined with the transmission 6. NC device 1 controls the running of driving motor 2 and different clutch terminals 12 of clutch 13 to join and release with the transmission 6. The piston journey is divided into high speed moving segment of long distance and low speed accurate moving segment of micro distance by NC device. In different moving segment different clutch terminal 12 is started so that the core of control valve 14 obtains different feedback energy and different moving speed and located accuracy of piston are controlled.

The invention discloses a moving magnet-type cylindrical linear motor. The moving magnet-type cylindrical linear motor primarily consists of a winding, an iron core, a core shaft, a nonmagnetic guard shaft and the like; and the moving magnet-type cylindrical linear motor secondarily consists of a permanent magnet topology, an end cover, a linear bearing and a shell and is a movable structure, and a kinematic pair is formed by the linear bearing and the primary nonmagnetic guard shaft. The moving magnet-type cylindrical linear motor has the advantages of being capable of obviously improving motor thrust loading, and effectively inhibiting tooth space detent force by the non-uniform permanent magnet topology, primarily adsorbing no machined chips or iron chips and ensuring safe operation of the motor.

An integrally-formed shoulder tab mould is formed by a base plate, a cover plate, a clamping plate and a fixing piece; one side of the base plate is hinged to the cover plate which comprises the same structure with the base plate and the cover plate and the base plate are in mirror symmetry; the base plate is formed by a base plate positioning plate, a base plate backing plate, a base plate cover plate, a left base plate clamping plate and a right base plate clamping plate; the base plate backing plate is composited between the base plate positioning plate and the base plate cover plate; a base plate seam through groove which is adaptive to a shoulder tab in shape is formed in the middle of the base plate positioning plate; a base plate cover plate through groove is formed at a base plate cover plate position which is corresponding to the base plate seam through groove; the left base plate clamping plate and the right base plate clamping plate are arranged in a base plate clamping plate through groove in an embedded mode, wherein the base plate clamping plate through groove is formed between the base plate positioning plate and the base plate cover plate. According to the integrally-formed shoulder tab mould, the base plate, the cover plate, the clamping plate and the fixing piece are matched with each other and accordingly the integral forming is achieved and the technical problems that the machining mode is complicated, the positioning is inconvenient, and the requirements for the operation level of workers are high in the process of shoulder tab manufacture are fundamentally solved.

The invention discloses a preparation method of a reinforced concrete beam with a demounting-free textile reinforced concrete (TRC) bottom mould, which relates to a long strip-shaped structural member for bearing. The preparation method comprises the following steps of: A, manufacturing a textile fleece reinforced concrete board: determining the size of the TRC board, and constructing a common steel mouldboard for the TRC board or customizing the steel mouldboard of the required size according to the size of the TRC board, preparing the textile glass fleece, mixing the concrete prepared according to the mass rate, grouting the concrete in the constructed common steel mouldboard or the customized steel mouldboard, paving the textile glass fleece, maintaining, and demounting the mould; and B, manufacturing the concrete beam with the demounting-free TRC bottom mould: constructing a common steel mouldboard for the TRC board or customizing the steel mouldboard of the required size according to the size of the TRC board, reinforcing bars, grouting the concrete, maintaining, and demounting the mould. The TRC board manufactured by using the method disclosed by the invention replaces the current wood mouldboard, the bamboo plywood mouldboard or the steel mouldboard, so that the defects that the current wood mouldboard, the bamboo plywood mouldboard or the steel mouldboard is not environmental-protection, is large in weight, high in price and low in construction efficiency, and can easily cause the conditions that the reinforcing steel bars cannot be accurately positioned and the surface of the member is not smooth after the mould is demounted, and the like can be overcome.

The invention relates to an image tampering detection method, terminal equipment and a storage medium, and the method comprises the steps: S1, collecting an untampered image and a corresponding tampered image, subtracting the tampered image from the untampered image to obtain a difference image of the tampered image, and enabling the untampered image and the tampered image to jointly form a training set; S2, constructing a binary classification network model, and training the binary classification network model through the training set, so that the trained binary classification network model can distinguish whether the image is tampered or not, wherein the binary classification network model comprises a feature extraction layer, an image attention layer and a classifier; S3, recognizing whether the image is tampered or not through the trained binary classification network model. The difference image is used as a real label. A real label is used as tampering supervision information, a neural network is used for training a binary classification network, the network is guided to obtain an accurate tampering detection probability value and a fake positioning graph, and the performanceof face tampering image recognition and classification can be effectively improved.

The invention discloses a traffic Internet-of-Things testing method based on fault simulation. The traffic Internet-of-Things testing method is characterized in that a testing machine is connected to a tested system through a network switching device and gateway devices, and the testing machine executes the following steps: (1) a traffic Internet-of-Things simulation environment is built; (2) simulation testing data are generated, and on the basis of the built traffic Internet-of-Things simulation environment, the simulation testing data under the normal condition and the simulation testing data under the fault condition are generated; (3) testing is carried out, a testing script transmits the simulation testing data generated in the step (2) to the tested traffic Internet-of-Things system through the network switching device and the gateway devices, collects the operation result of the tested system and returns the operation result to the testing machine through the network switching device and the gateway devices, and the testing machine analyzes and outputs the testing result. The traffic Internet-of-Things testing method mainly solves the problem that faults appearing in existing traffic Internet-of-Things engineering construction are difficult to disinter and position, and has the advantages that the testing efficiency is improved, the testing cost is reduced, and the traffic Internet-of-Things testing method is suitable for practical application.

The invention provides a liquid crystal display device, comprising a liquid crystal panel glass product set, a plurality of optical sheets, a rear shell and a mainboard component, wherein, the liquid crystal panel glass product set comprises liquid crystal panel glass and a driving circuit board; the invention is characterized in that: in the invention, the liquid crystal panel glass product set and the optical sheets which are used for realizing display function are sequentially superimposed and arrayed, and then are clamped and fixed by a clamping component matching the liquid crystal panel glass product set and the optical sheets or fixedly or movably buckled at the rear shell. The invention replaces a backboard and a central frame of the conventional liquid crystal panel with the rear shell to save the heavy backboard and central frame, and replaces a front frame with a clamping component; in the invention, the parts adopt a mode of separated superimposing and integrated clamping to greatly save product materials, reduce process steps and lower production cost; meanwhile, the thickness and weight of the liquid crystal display can be reduced, and requirement of thinness and lightness for the liquid crystal display can be well satisfied; furthermore, the invention overcomes optic structure positioning, shock-proof, skid-proof, radiation-proof and other problems caused by simplifying the structure.

The present invention provides a cooperative alarming and overawing method and device, especially a method and device of quickly alarming and acquiring police help, effectively playing important roles in overawing for burstiness criminal offence, offender. The invention integrates the technologies of public intelligent mobile phone, handy start, human face identification, voiceprint recognition and audio-frequency power amplifying etc, providing a cooperative alarming and overawing method and device composed by the police and the alarming person. The alarming person not only linked starts relative functions of video telephone, video short message of mobile phone, AGPS or GPS capable of short message pass by reference or coordinate calling and getting line dialing ect by the emergency alarming key, but also obtaining police emergency corresponding guidance instantly and warning deterrent of the criminal by a siren signal generator on one side of the police and the sound volume switching key, large power amplifier and large power speaker on one side of the alarming person, and guiding the police quickly find the happening place according to the siren having huge volume.

The invention relates to a building feature extraction method and system based on three-dimensional modeling and a storage medium. The building feature extraction method based on three-dimensional modeling comprises the steps of acquiring orthoimage and inclined images and preprocessing the images; performing three-dimensional modeling on acquired images. The invention also comprises a building feature extraction system based on three-dimensional modeling, and the system comprises an obtaining unit which is used for obtaining orthoimage and an inclined images, and preprocessing the images; anda processing unit used for carrying out three-dimensional modeling on the preprocessed images. According to the invention, a technical means of feature extraction, filling and identification after three-dimensional modeling of the images is adopted. The technical problems that in the prior art, it is difficult to extract a static target through the two-dimensional images, and an image analyzing and processing method of a moving target cannot be used for positioning and segmenting a static building are solved. The beneficial effects of reducing the difficulty of static target feature extraction and applying the image analysis and processing method of the moving target to positioning and segmentation of the static building are achieved.

The invention discloses a multi-functional intelligent wrist-type help-seeking hand ring which comprises a shell (1) and an inner core (2). The shell is provided with a wristband; the inner core is provided with a circuit board, a GPS antenna, a GSM antenna, a pickup, a speaker, a charging interface, a vibration motor, a camera, a display screen, a button, a lithium battery, and an SIM card seat; a microprocessor, an intelligent communication chip, a video chip and a memory are arranged on the circuit board; the inner core is arranged in the inner cavity of the shell. During application, an SIM card is required to be inserted into the multi-functional intelligent wrist-type help-seeking hand ring, so that a network operator can provide services, and the multi-functional intelligent wrist-type help-seeking hand ring can be kept in contact with a GPS; the multi-functional intelligent wrist-type help-seeking hand ring is worn on a wrist through the wristband, so that the multi-functional intelligent wrist-type help-seeking hand ring can move with a user; during use, the button is pressed, and the functions of GPS location, telephoning, transceiving of SMS, WeChat, micro-video and micro-audio, video displaying, recording, picture recording, photographing, and information saving are realized by operating virtual buttons displayed on the display screen. Therefore, the multi-functional intelligent wrist-type help-seeking hand ring being an electronic hand ring has the functions of GPS locating, real-time information exchange, and automatic alarm for seeking help.

The invention belongs to the technical field of aero-engine maintenance, and relates to a cast isometric crystal high-temperature alloy turbine rotor blade tip repairing method and tool. According tothe method, repairing is completed through a laser selective melting or electron beam selective melting process, a blade can be placed in a forming area of laser selective melting or electron beam selective melting equipment and formed at a blade tip through the tool, data are obtained through three-dimensional scanning for reverse modeling, a model needing to be repaired and formed and related position information are obtained, the corresponding tool and blade clamping are designed, the structure and form of the tool are not limited, and the tool can be used for completing blade clamping, auxiliary positioning and position calibration; printing repairing forming is conducted after positioning calibration, and finally aftertreatment and detection are completed; and the positioning precision of blade repairing is well controlled, and the beneficial effects that the cast isometric crystal high-temperature alloy turbine rotor blade tip repairing method and tool is small in heat input, fine in grains, excellent in mechanical property, small in deformation, excellent in surface roughness and high in size precision, near-net forming does not need machining, and forming is rapid and efficient are achieved.

The invention discloses a piezoelectric linear motor fused with a shear piezoelectric actuator composite drive mode and a preparation method thereof. The piezoelectric linear motor comprises a piezoelectric harmonic oscillation piezoelectric transducer, a shear piezoelectric actuator, a drive circuit, a slider, a friction head fixed to the shear piezoelectric actuator, and peripheral parts. The harmonic oscillation piezoelectric transducer and the shear piezoelectric actuator are tightly bonded together to form a composite piezoelectric drive stator. The friction head and the slider in a sliding assembly are in close contact. The harmonic oscillation piezoelectric transducer and the shear piezoelectric actuator are provided with an upper surface electrode and a lower surface electrode. The piezoelectric motor can be driven in a harmonic, direct-current or composite mode, can produce macroscopic continuous linear motion and sub-micron and nanometer motion, and can produce big driving force. The piezoelectric linear motor of the invention is simple in structure and convenient to make, and can be popularized and applied in the field of precision driving.

The invention belongs to the technical field of aero-engine maintenance and relates to a wrought superalloy and stainless steel gas compressor rotor blade tip repair method and tool. According to themethod, repairing of the tip of a gas compressor rotor blade is completed through a selective laser melting or selective electron beam melting process; by the aid of the tool, the blade can be arranged in a forming area of selective laser melting or selective electron beam melting equipment and the tip of the blade can be formed; data are obtained through 3D scanning to conduct reverse modeling toobtain a model requiring repair forming and the related position information, the corresponding tool is designed for clamping the blade; the structure and form of the tool are not limited, and the tool can be used for completing blade clamping, auxiliary locating and position correction; after locating correction, printing repair forming is carried out, and finally, aftertreatment and detection are completed; and the locating precision for blade repairing is controlled well. Moreover, the wrought superalloy and stainless steel gas compressor rotor blade tip repair method and tool have the advantages of small thermal input, fine grain particles, good mechanical performance, little deformation, good surface roughness, high dimensional precision, near-net forming without machining, rapid andefficient forming and the like.

The invention relates to a non-destructive testing technology of polyethylene pipeline hot-melt butt joint and aims to provide an ultrasonic detection device and method for PA-TOFD combined polyethylene pipeline hot-melt butt joint. The ultrasonic detection device comprises a circumferential scanning track which is arranged on a polyethylene pipeline; the circumferential scanning track is providedwith a circumferential scanning device; one end of the connecting rod is fixed on the top of the circumferential scanning device, and the other end of the connecting rod is respectively provided witha phased array probe and a single crystal straight probe through a probe holder; the two probes are positioned on two sides of the hot-melt butt joint of the polyethylene pipeline, and a gap is maintained between the end part of the probe and the polyethylene pipeline. The ultrasonic detector has two detection functions of ultrasonic phase control detection and TOFD detection, and the phased array probe is used as an acoustic wave transmitting probe for ultrasonic phased array detection and TOFD detection. And the two detection results are synchronously displayed in real time. The method overcomes the defects that the traditional pulse-type ultrasonic detection technology is not intuitive, the data cannot be recorded and stored, and the defects of precise positioning and quantification are difficult to be made.

The invention discloses a magnetic lock catch which is composed of a locking device and a positioning device. The locking device is provided with an outer shell, a big end up steel ball sliding groove is formed in the bottom of the outer shell, a steel ball is arranged in the steel ball sliding groove, a steel ball pressing block and a locking spring which are matched with a magnetic block are arranged at the upper end of the steel ball sliding groove in the outer shell, and the locking spring presses the steel ball in the steel ball sliding groove through the steel ball pressing block. The positioning device comprises a positioning pin, a movable gasket, a positioning spring and a fixing piece. The front end of the positioning pin is a locking section which can penetrate through the steel ball sliding groove, an arc-shaped groove matched with the steel ball is formed in the middle portion of the locking section, the movable gasket and the positioning spring are arranged on the positioning pin in a sleeved mode, and the fixing piece is connected with the rear end of the positioning pin. The magnetic lock catch can achieve movable connection between two independent parts, is suitable for enabling a plurality of parts to be movably connected with other parts simultaneously, and has the advantages of being precise in positioning and high in connecting efficiency.

The invention relates to a positioning method based on fractional planning in an asynchronous network. The positioning method comprises the following steps: firstly establishing a signal transmissiondistance model between a target source and each sensor, and then adopting a thought for converting the TOA (time of arrival) into the TDOA (time difference of arrival); constructing a weighted least square method according to upper bound and distribution conditions of the clock drift, thereby obtaining a non-convex positioning problem; and then obtaining a mixed second-order cone / positive semidefinite planning problem by importing auxiliary variable and adopting a convex relaxation method; and finally performing solving by utilizing common interior point method software (CVX) to obtain a finalestimation value of the target source at a coordinate location in a reference coordinate system. The positioning method disclosed by the invention has the advantages that the positioning difficulty,the fractional planning problem and the quasi-convex problem in the prior art are overcome, the energy consumption cost is relatively low, the error is low, the positioning accuracy is high and free from performing any further after-processing.

The invention relates to a GPS-GPSOne dual mode switching method applied at the time of mobile terminal positioning and a terminal thereof. The GPS-GPSOne dual mode switching method comprises the following steps: the first step: performing switching judgment on the state between the GPS-GPSOne dual mode by an inertia rule and an efficiency rule; the second step: selecting the GPS or GPSOne positioning mode by a speed threshold and a signal threshold; the third step: comparing the ordering mode of a GPS satellite constellation with that of a GPSOne base station, and selecting the positioning mode; and the fourth step: switching between the GPS mode and the GPSOne mode. A GPS-GPSOne dual mode switching terminal comprises a main control unit, a GPS receiving unit and a GPSOne receiving unit. The method and the terminal can effectively ensure the flexibility of and the rapid switching between the GPS positioning mode and the GPSOne positioning mode, and ensure the whole course continuity and the stability of vehicle positioning.

The invention discloses a wind turbine generator blade bonding corner and further discloses a preparation method of the wind turbine generator blade bonding corner. The wind turbine generator blade bonding corner is provided with lining plates and a U-shaped structure. The outer side shape of the U-shaped structure is matched with the inner side shape of a corresponding blade bonding area, and thelining plates are arranged along the inner side of one edge or two adjacent edges of the U-shaped structure. The preparation method comprises the steps that (1) the lining plates are prepared insidethe parting line of one face of a blade shell according to the shell inner wall shape, and the lining plates are subjected to demolding and edge trimming; and (2) a bonding corner laying layer is manufactured through a fiber cloth and resin, then the parting line side of the prepared lining plates is aligned at the center line of the bonding corner laying layer to place the bonding corner laying layer and the lining plates between a bonding corner mold and the blade shell, the lining plates are clamped on the bonding corner mold through a clamp, after the bonding corner laying layer is solidified, demolding is conducted, and then the bonding corner with the lining plates is obtained. The following property of the bonding corner with the lining plates and the shell is high, the defects thatan existing bonding corner is corrugated and deformed, and positioning is poor can be overcome, and the blade bonding quality is improved.

The invention discloses a multi-filter paper full-automatic winding machine, which comprises a filter core skeleton transport positioning mechanism, a skeleton tension winding mechanism, a filter paper transport positioning cutting mechanism, and a tape transport pasting mechanism; the filter core skeleton transport positioning mechanism sends the filter core skeleton to to the skeleton tensioning and winding mechanism; the skeleton tensioning and winding mechanism tightens the filter element skeleton and drives the filter element skeleton to rotate; the filter paper conveying positioning and cutting mechanism is provided with multiple, and each filter paper conveying positioning and cutting mechanism is equipped with A filter paper roll; the filter paper transport positioning and cutting mechanism sends the filter paper on the corresponding filter paper roll to the filter element skeleton expanded by the skeleton expansion and winding mechanism; the tape conveying and pasting mechanism sticks the filter paper to the filter element skeleton through tape superior. The invention realizes the full automation of the winding production of the filter element and filter paper, reduces the labor intensity of the production personnel, improves the production efficiency, and has broad market prospects.

The invention relates to a coreless stepping motor and a control method thereof. The coreless stepping motor comprises a stator group, a rotor group, a pivot, a shell body, a cover body and a plate body, and is characterized in that the stator group is composed of three groups of coils, and the three groups of coils are a first phase coil, a second phase coil and a third phase coil respectively; the first phase coil, the second phase coil and the third phase coil are around the rotor group; the pivot is pivoted with the rotor group; the shell body is used for accommodating the stator group and the rotor group; the cover body is connected to one end of the shell body; and the plate body is connected to the other end of the shell body relative to the cover body. According to the invention, a problem of positioning torque or cogging torque can be overcome, and the coreless stepping motor can improve the precision of a stepping angle of rotation and reduce the amount of vibration.

The invention provides a phased array ultrasonic detection method for a curved surface fillet weld of pile leg racks of a drilling platform. A fillet weld to be detected is a fillet weld between an arc-shaped string pipe and a rack plate. The method comprises the step of emitting phased array ultrasonic waves into the outer curved surface of the arc-shaped string pipe to detect defects in the fillet weld, wherein the transverse wave incidence angle of the phased array ultrasonic waves ranges from 35 degrees to 75 degrees, and the distance between the incidence point of the phased array ultrasonic waves and a beveled edge face, located on one side of the rack plate, of the fillet weld ranges from 70 mm to 140 mm. The phased array ultrasonic detection method for the curved surface fillet weld of the pile leg racks of the drilling platform can remarkably improve flaw detection rate and detection efficiency.

The invention is a near field optical microscope which includes a laser beam, its character lies in: its structure is: semi-reflect and semitransparent mirror is arranged on the advancing direction of the laser beam and form an angle of 45 degrees to the laser beam, on the light shaft vertical to the laser beam and penetrating the semi-reflection and semitransparent mirror, a detector is arranged above the semi-reflection and semitransparent mirror coaxially, a gathering lens, semi-sphere solid immersing lens, sample and sample frame are arranged under the semi-reflection and semitransparent mirror, the lower surface of the solid immersing lens are plated with a layer of mask layer and the super-resolution mask layer is on the focus plane of the gathering lens, the sample is on the sample frame. The resolution of the microscope is higher and it is adjustable.

The invention discloses a wired unmanned aerial vehicle pier surface detection device which comprises a rotor unmanned aerial vehicle, touching rods, a power supply and a lifting mechanism. The lifting mechanism further comprises a variable-frequency motor, a transmission shaft, reels and a rack. The variable-frequency motor is fixedly mounted on the rack. The output end of the variable-frequency motor is fixedly connected with the transmission shaft. The first reel and the second reel are sequentially fixed to the transmission shaft in the axial direction. The touching rods connected with the rotor unmanned aerial vehicle are separately connected with the output ends of an anode and a cathode of the power supply. Twisted ropes on the lifting mechanism reels are separately connected with the same ends of the touching rods. By controlling rising and falling of horizontally operated rotor unmanned aerial vehicle observation equipment through the lifting mechanism in the longitudinal direction, the rotor unmanned aerial vehicle can achieve horizontal cruise, shooting and observation in the axial direction of the touching rods, and a technical blank of large bridge detection is filled.