47results about How to "Reduce blind spots" patented technology

The invention discloses a laser radar zero-blind-area detection system and method based on automatic switching of far and near fields, and solves the problem of low signal receiving efficiency of detection blind areas and far and near fields 100 meters below the ground in the prior art. According to the system, laser emission beams are respectively transmitted along coaxial and off-axis paths through a light splitting module, an aperture diaphragm automatic adjusting device is introduced, a receiving aperture is automatically switched according to far and near field imaging characteristics, and efficient coupling of signals and optimized receiving under a weak light condition are ensured. The system combines far and near field signals to the same optical path by using an automatic beam combination switching device, realizes multichannel signal detection, and supports multifunctional atmospheric parameter monitoring such as aerosol, Raman scattering and the like. The control and data processing system automatically manages signal switching and data processing, operation is simplified, and data reliability is improved. The technology is obviously superior to the prior art in the aspects of detection precision, system integration degree and multifunctional detection capability, and system complexity and cost are reduced.

This utility model discloses an ultrasonic endoscope, including an insertion head, which comprises: a head base with a main camera and an illumination module at its distal end; the shooting direction of the main camera and the illumination direction of the illumination module are both set at an angle to the axial direction of the head base; an ultrasonic probe, including an ultrasonic probe base connected to the distal end of the head base, an ultrasonic transducer connected within the ultrasonic probe base for emitting and receiving ultrasonic waves, and a secondary camera and illumination assembly connected to the ultrasonic probe base; the shooting and illumination directions of the secondary camera and illumination assembly are parallel to the axial direction of the head base. By additionally setting a secondary camera and illumination assembly on the ultrasonic probe, the secondary camera and illumination assembly can provide the ultrasonic endoscope with a field of view and illumination in the axial direction. Combined with the main camera and illumination module with lateral shooting illumination on the head base, a larger field of view can be formed, reducing the blind spots of the ultrasonic endoscope when shooting in the digestive tract or other natural orifices.

The lifting device comprises a transmission shaft, a shaft sleeve, an elastic piece, a driving assembly and a rotary mounting part, the transmission shaft comprises an external thread section, a transmission section and a mounting section which are sequentially arranged in the axial direction of the transmission shaft, the shaft sleeve is rotationally mounted on the rotary mounting part and is in threaded connection with the external thread section, and the shaft sleeve is provided with a first limiting part; the elastic piece elastically abuts against the shaft sleeve, so that the shaft sleeve keeps still under the acting force of the elastic piece, and the driving assembly is in transmission connection with the transmission section to drive the transmission shaft to rotate, so that the transmission shaft moves back and forth relative to the shaft sleeve under the interaction of the shaft sleeve and the external thread section and rotates in the first direction. When the tail end of the external thread section moves to the first limiting part, the tail end of the external thread section abuts against the first limiting part in a transmission mode so as to synchronously drive the shaft sleeve to rotate in the first direction. According to the technical scheme, the lifting operation of the cleaning assembly can be driven only through the driving assembly, and the cleaning assembly can be driven to rotate.

The application relates to the microwave technical field and provides a cooking utensil, the cooking utensil has a cooking cavity, a cavity wall of the cooking cavity is formed with a first microwave feed inlet and a second microwave feed inlet, the cooking utensil comprises a microwave generating assembly and a waveguide channel, the microwave generating assembly is used for generating microwaves; the waveguide channel is used for conducting the microwaves generated by the microwave generating assembly to the cooking cavity through the first microwave feed inlet and the second microwave feed inlet; wherein the number of the first microwave feed inlets is multiple, the feed lengths of at least two first microwave feed inlets are different, the feed length is the extension length of the middle line between two edges of the first microwave feed inlet along the extension direction of the first microwave feed inlet, the contour of the second microwave feed inlet comprises a plurality of contour edges, and the included angle between at least one group of adjacent contour edges in the plurality of contour edges is between 133 DEG and 137 DEG. The cooking utensil provided by the application can reduce the microwave distribution blind area and improve the heating uniformity.

The utility model relates to headrest folding technical field discloses a kind of foldable storage's car seat headrest support structure, including seat, the headrest rod is installed in the seat, the similar side of multiple headrest rods is fixedly connected with locking leaf, the lower end of multiple locking leaf is fixedly connected with rotating center rod between adjacent, rotating center rod middle fixed mounting multiple limit stake, the outer wall left and right sides of rotating center rod are rotatably connected with lock plate, spring two is installed in the rotating center rod outer wall between multiple lock plate and limit stake.The utility model in the prior art, when needing to fold headrest, exert force on back cover, and then will act on connecting rod, the force received by connecting rod will act on the top of lock plate, and at the same time, spring two mounted on rotating center rod will be applied, so that the lock plate will rotate under the action of spring two.

The invention discloses an operation shadowless lamp which is characterized in that a connecting rod is located on one side of a shadowless lamp body and arranged in a vertical mode, a rotating disc is arranged above a base, second bearing seats are symmetrically and fixedly installed on the top of the rotating disc, and a connecting arm with a rotating shaft is arranged between the two second bearing seats; an obliquely-arranged small shadowless lamp is fixedly installed at the end, away from the second bearing seat, of the connecting arm, a plurality of second magnetic attraction pieces are arranged at intervals in the circumferential direction of the bottom of the rotating disc, and an annular sliding groove is formed in the position, below the second magnetic attraction pieces, of the top wall of the base. And a sliding plate of which the top is provided with a first magnetic suction sheet is movably inserted into the notch. According to the operation shadowless lamp, storage and use of the small shadowless lamp can be achieved, adjustment is convenient and fast, the overall size can be reduced, personnel can operate the operation shadowless lamp conveniently, multi-directional adjustment of the small shadowless lamp is achieved, the overall applicability of the operation shadowless lamp is expanded, and the irradiation effect of the shadowless lamp is improved.

The utility model provides a kind of inspection robot, and inspection robot includes: fuselage, tracked mobile chassis, threading component, information acquisition component, controller, power component and navigation module;Tracked mobile chassis includes two tracks, and two tracks are arranged in the both sides of fuselage, and with fuselage movably connected;Threading component and information acquisition component are respectively arranged in the both ends of fuselage, and threading component is fixedly connected with fuselage, and information acquisition component includes infrared camera, and infrared camera is movably connected with fuselage;Controller, power component, navigation module are respectively fixedly connected with fuselage;Tracked mobile chassis, information acquisition component, threading component, navigation module are respectively electrically connected with controller;Tracked mobile chassis, information acquisition component, threading component, navigation module are respectively electrically connected with power component.Inspection robot has the moving ability of adapting complex environment and the work ability of efficient cooperation, and can satisfy the automatic inspection demand under various scenes.

The invention discloses a ribbon cutting device, and relates to the technical field of cutting devices. The cable tie cutting device comprises a shell, a cutting piece, an overturning piece and a handheld piece. The cutting piece is fixed to one end of the shell, the overturning piece is rotationally connected to the cutting piece, a first containing part is arranged in the overturning piece and used for containing a ribbon, one end of the handheld piece is fixed to the overturning piece, and the handheld piece is used for driving the overturning piece to rotate. When the overturning piece rotates, the overturning piece can drive the binding belt located in the first containing part to rotate, so that the cutting piece can cut off the binding belt. Due to the arrangement of the overturning part, an operator only needs to operate the handheld part and drives the overturning part to rotate through the handheld part to cut off the cable tie, the whole cable tie cutting device does not need to be overturned, operation is more convenient, interference with surrounding objects is not likely to happen in the cutting process, the view blind area is reduced, and the cable tie cutting device can be used in a narrower space; and the requirement on the operation space is improved.

The application discloses a method and system for continuous blood glucose monitoring, and a storage device, which can give a new blood glucose monitor a warm-up time, thereby reducing the blind area of blood glucose data. The technical scheme is as follows: a method for continuous blood glucose monitoring, comprising the following steps: a, an intelligent terminal is connected with a new blood glucose monitor and an old blood glucose monitor which is within a time period to an expiration time, and a new-old double connection link is established; b, the intelligent terminal adopts different communication frequencies for the new blood glucose monitor and the old blood glucose monitor; and c, in the time period of the double connection link, blood glucose data sent by the old blood glucose monitor is output to a user within a preset time.

The invention relates to an intelligent computing framework test method based on coverage, and belongs to the field of intelligent computing. According to the method, a framework is abstracted into a code layer, an operator layer and an environment layer, and designed coverage indexes comprise operator coverage, code line coverage, control flow coverage, data flow coverage, concurrency coverage, exception handling coverage, diversified input coverage, operator parameter combination coverage, model structure coverage and hardware coverage; a specific test method is designed according to the characteristics of each coverage degree, the operation performance of the framework under different conditions is evaluated, and potential defects are found out; and designing a comprehensive weighting method, and introducing marginal cost-effectiveness fusion based on defect detection efficiency, redundancy related punishment and dynamic correction based on a test result of each round into a subjective and objective weighting method. According to the method, potential defects and vulnerabilities can be found and positioned in time, the adaptability of the framework to various application scenes and extreme conditions is improved, and the robustness of the system is enhanced.

The utility model relates to the technical field of shot blasting heads, in particular to a shot blasting head special for a hydraulic casting oil duct and capable of blasting shots in multiple directions. The shot blasting head mainly aims at solving the problems that a common shot blasting head mostly adopts a vertical mode for shot blasting, is difficult to use in a bent area in a hydraulic casting oil duct, increases a cleaning blind area in the shot blasting process, directly impacts the inner wall of the oil duct, increases damage to the oil duct, reduces the durable life and reduces the working efficiency. According to the technical scheme, the shot blasting head comprises a connecting piece, a guide assembly is arranged at the bottom of the connecting piece, a shot blasting pipe is arranged at the bottom of the guide assembly, and an inner channel of the shot blasting pipe is arranged in an L shape. The multi-directional shot blasting device realizes multi-directional shot blasting, improves the practicability of a complex casting oil duct, is beneficial to disassembly and replacement, and reduces the maintenance and replacement cost.

This utility model relates to the field of medical device technology and discloses an anesthesia video laryngoscope, including a frame. A screen is installed on the inner side of the frame, and a circuit board is installed on the rear side of the frame. A memory card is disposed on the top wall of the circuit board and engages with the circuit board. A rear shell is fixedly connected to the rear side of the outer wall of the circuit board, and a rotating shaft is rotatably connected to the rear side of the outer wall of the rear shell. A plastic part is rotatably connected to the outer wall of the rotating shaft, and a connector is fixedly connected to the bottom wall of the plastic part. A heat shrink tubing is fixedly connected to the inner top wall of the connector. In this utility model, the light and lens at the bottom of the handle acquire images of the patient's oral cavity and pharynx. After preliminary processing by a second circuit board, the data is further processed by a first circuit board and displayed on the screen. It can adapt to the patient's body posture and anatomical structure at different angles and positions, allowing doctors to observe the surrounding structures more comprehensively and improving the applicability of the laryngoscope.

The application provides a multi-model cooperative detection method and system for traffic abnormal events, and relates to the technical field of intelligent transportation.The method comprises the following steps: constructing a multi-source perception system covering a target traffic area, and obtaining a multi-source traffic data set; performing semantic division based on road structure and traffic operation characteristics, obtaining a plurality of traffic state units, continuously encoding the states, and generating a plurality of time-series traffic state representations; performing traffic state abnormality preliminary screening, and constructing a candidate abnormal traffic event set; inputting a multi-model cooperative analysis framework, performing multi-model joint reasoning, and outputting abnormal traffic event identification results; and combining traffic network propagation characteristics to generate abnormal traffic event response strategies.The application solves the technical problem that the traffic abnormality detection in the prior art often uses a single model to analyze data, which cannot capture multi-dimensional information of complex traffic events, thereby affecting the accurate identification of traffic abnormal events.

The utility model discloses a smart city traffic monitoring device, which belongs to the field of traffic monitoring and comprises a height adjusting assembly. A mounting base is slidably arranged on the height adjusting assembly, a first rotating shaft is mounted on the side face of the mounting base, a supporting arm is rotatably arranged on the first rotating shaft, and a second rotating shaft is rotatably arranged at the other end of the supporting arm. Compared with traffic monitoring in a citation file, the intelligent urban traffic monitoring device has the advantages that the height adjusting assembly is additionally arranged to adjust the installation height of the traffic monitoring camera body, so that the height of the traffic monitoring camera body can be adjusted in the vertical direction, and the traffic monitoring camera body can be adjusted according to actual requirements; the installation height of the traffic monitoring camera body can be flexibly adjusted so as to obtain an optimal visual field range; through the rotary connection between the support arm and the second rotating shaft and the rotary connection between the second rotating shaft and the support, the traffic monitoring camera body can be adjusted at multiple angles to obtain a better monitoring visual angle.

This application discloses a building antenna, relating to the field of wireless communication technology. The building antenna includes a base plate, an upper antenna, and a lower antenna. Both the upper and lower antennas are disposed on the base plate. The electromagnetic waves radiated by the upper antenna cover the upper part of a target building, and the electromagnetic waves radiated by the lower antenna cover the lower part of the target building. Both the upper and lower antennas include a substrate and at least two radiating elements. The substrate is disposed on the base plate, and each radiating element is disposed on the substrate and arranged in an array. The number of radiating elements in the lower antenna is greater than the number of radiating elements in the upper antenna. This solution can solve the problem of uneven signal coverage of current building antennas to target buildings.

This invention relates to the field of pipe surface inspection technology, and discloses a new type of composite pipe surface inspection equipment, including a housing with a feed inlet at the front and a movable door on the left side. A fixing plate is fixedly connected to the inner wall of the housing, and the pipe to be inspected is placed on the inner wall. A clamping mechanism, a scraping mechanism, and a feeding mechanism are also provided on the inner wall. When in use, the device moves the camera back and forth laterally while the pipe rotates, reducing blind spots when the camera inspects the outer surface of the pipe, preventing errors caused by strong light generated by oil stains during inspection, and preventing deformation of the pipe during transportation, thus improving the efficiency of pipe replacement for workers.

The utility model relates to the field of medical instruments, and discloses an endoscope module, which comprises an endoscope lens arranged at the front end of the endoscope module and used for capturing images, and the endoscope lens is provided with an optical axis; the front end of the head end seat comprises an upper inclined surface and a lower inclined surface, an upper frame and a lower frame of the endoscope lens are respectively contacted with the upper inclined surface and the lower inclined surface, so that the endoscope lens is fixedly connected with the front end of the head end seat, and the endoscope lens is positioned to enable the optical axis of the endoscope lens and the axial direction of the head end seat to form a preset angle of 30-60 degrees; the shell is coaxially connected with the head end seat, surrounds the rear end of the head end seat and is used for providing protection and cooperating with handheld operation; the LED lamps are arranged on the left side and the right side of the endoscope lens and used for providing illumination; and the flexible circuit board is electrically connected with the endoscope lens and is used for transmitting the image signal. According to the endoscope, a more excellent imaging effect can be obtained, and the usability and reliability of the endoscope are improved.

The invention provides a multi-dimensional parameter flux sensing fusion system based on a multi-core optical fiber, and relates to the technical field of optical fiber communication and optical fiber sensing. The system comprises a multi-core optical fiber, a first fan-in and fan-out module, a second fan-in and fan-out module and a multi-dimensional sensing signal acquisition device, wherein the multi-core optical fiber comprises two independent fiber cores; the input end and the output end of the first fan-in and fan-out module respectively comprise two ports, the two ports of the input end are respectively connected with the communication signal sending unit and the multi-dimensional sensing signal acquisition device, and the two ports of the output end are respectively connected with two independent fiber cores of the multi-core optical fiber; the input end of the second fan-in and fan-out module comprises two ports which are respectively connected with two independent fiber cores of the multi-core optical fiber, and the output end of the second fan-in and fan-out module is connected with the communication signal receiving unit. According to the invention, integration of communication and sensing is realized, the function integration level is high, and the resource utilization rate is high. The method can be widely applied to various complex environments such as electric power communication networks, submarine cables, comprehensive pipe galleries, rail transit and oil and gas pipelines.

The utility model provides a double-blade dispersion machine with optimized dispersion effect, which comprises a machine barrel, a driving motor, a rotating shaft, an upper dispersion piece, a conical flow guide cover and a lower dispersion disc piece, the upper dispersion piece comprises an upper dispersion disc and upper dispersion blades, the conical flow guide cover is arranged on the rotating shaft and is arranged between an upper thread adjusting section and a lower thread adjusting section, and the lower dispersion disc piece comprises a lower dispersion disc and a lower dispersion blade. The lower dispersing disc piece comprises a lower dispersing disc and lower dispersing blades, and the inclination direction between the upper dispersing blades and the upper dispersing disc is opposite to the inclination direction between the lower dispersing blades and the lower dispersing disc. The dispersion device has the beneficial effects that the inclination direction between the upper dispersion blade and the upper dispersion disc is opposite to the inclination direction between the lower dispersion blade and the lower dispersion disc, so that multidirectional shear force can be generated, eddy current can be broken, the dispersion uniformity can be improved, and the distance between the upper dispersion disc and the lower dispersion disc can be adjusted through the arrangement of the upper thread adjusting section and the lower thread adjusting section; the device adapts to materials with different viscosities, and the application range is expanded; the conical flow guide cover can promote material circulation.

The present application discloses a front-end component, an insertion part and an endoscope, and relates to the technical field of medical devices. The front-end component is applied to an endoscope, and the front-end component includes a camera module and a front-end shell, wherein: the camera module is movably connected to the peripheral side of the front-end shell, the camera module includes a first camera, the shooting direction of the first camera is toward the distal end of the front-end shell, and the camera module is movably arranged along the axial direction of the front-end shell to adjust the axial position of the first camera. The above scheme can optimize the shooting performance of the camera module and the structural layout of the front-end component.

The utility model relates to a walking board type illuminating lamp installation structure and a crane walking board, the walking board type illuminating lamp installation structure comprises a supporting part and an illuminating part, the supporting part comprises a walking board body and an installation plate, the surface of the walking board body is provided with an installation opening, the installation plate is installed at the installation opening, and the illuminating part is installed on the supporting part. A hinge is arranged between one side of the mounting plate and the mounting opening; the lighting part comprises a lamp panel and a connecting rod, one end of the connecting rod is connected with the top of the lamp panel, the other end of the connecting rod is connected with the mounting plate, and the lamp panel is arranged on one side of the bottom of the walking board body. The lamp panel is simple in structure, the whole lamp panel is installed at the bottom of the walking board body in a hidden mode through overturning of the installation plate, it is avoided that an illuminating lamp is installed on the outer side of the walking board to affect the using space of a crane, blind areas on the walking board side are reduced, and the utilization efficiency of the crane is improved.

This utility model belongs to the technical field of medical device disinfection equipment, specifically relating to an automatic disinfection micro-volume blood collection tube sterilization box, including an outer shell assembly, a storage mechanism, a dispensing mechanism, and a sterilization mechanism. The outer shell assembly includes a base, supporting side plates, a top cover, and a front panel. The storage mechanism is located inside the upper part of the outer shell assembly, including an inclined storage base plate and limiting sidewalls located on both sides of the storage base plate. The dispensing mechanism is installed at the end of the storage base plate and includes a rotating shaft, a dispensing roller, and a stepper motor. The sterilization mechanism includes a first sterilization group and a second sterilization group. The first sterilization group is installed on the top of the storage mechanism, and the second sterilization group is installed on the inner top wall of the discharge chute. This utility model achieves precise automatic dispensing of a single micro-volume blood collection tube, ensuring the aseptic use of medical consumables, effectively preventing infection during blood collection, and improving the ease of operation and portability for medical personnel.

This utility model discloses a coal mine transportation and pushing device, specifically relating to the field of coal mine transportation technology. It includes a conveyor platform, with a support and adjustment device fixedly connected to the lower end of the conveyor platform. A base plate is fixedly connected to the lower end of the support and adjustment device. A fixed frame is fixedly connected to the upper right side of the conveyor platform, and a dust collection and filtering device is fixedly connected to the upper end of the fixed frame. The coal mine transportation and pushing device of this utility model can be flexibly adjusted by tilt angle, enabling the coal mine transportation equipment to combine high efficiency, safety, and economy. Coal mine roadways have varying slopes; the adjustable tilt angle allows the equipment to quickly match the roadway undulations, avoiding material accumulation or slippage due to incompatible slopes. The same equipment can adapt to different transportation needs through angle adjustment, reducing equipment model dependence. An appropriate tilt angle can accelerate the descent of materials using their own weight, reducing conveyor belt drive power and saving energy consumption. The tilt angle also helps materials flow smoothly, improving transportation continuity.

The utility model relates to the technical field of high polymer materials, in particular to a polytetrafluoroethylene dispersion resin condensing and stirring device for a dry-method electrode binder, which comprises a condensing barrel, a stirring device, a stirring device, a stirring device and a stirring device, the top of the condensing barrel is provided with a driving mechanism, and the inner wall of the condensing barrel is provided with deflection baffles; the top of the stirring rod extends out of the coagulation barrel and is connected with the driving mechanism, and the bottom extends into the inner cavity of the coagulation barrel; the lower inclined paddle is arranged at the bottom of the stirring rod; the vortex stirring paddle is arranged at the bottom of the stirring rod and is positioned below the lower inclined paddle. The polyfluortetraethylene dispersion resin condensing and stirring device for the dry-method electrode binder, provided by the utility model, can adjust the specific gravity of dispersion resin mother liquor to a lower level so as to produce dispersion resin fine powder with uniform particles, and is good in fiber forming effect, high in fiber forming rate and not easy to break. When being used as a dry-method electrode binder, the active carbon particles exist in a fiber state, so that the contact between the active carbon particles and between the active carbon particles and conductive agent particles is tighter, and the electrode has the advantages of high density, good conductivity, high capacity and the like.

The invention discloses a multifunctional contact angle measuring device, and the device comprises a bearing platform which is used for placing a to-be-measured sample; the driving assembly is arranged on the bearing platform, and a first imaging module and a second imaging module are arranged on the driving assembly; the first imaging module comprises a first photosensitive element and a light path steering assembly; the second imaging module comprises a second photosensitive element and a three-dimensional imaging optical assembly, and the three-dimensional imaging optical assembly is configured to capture light rays from the surface of the to-be-detected sample and guide the light rays to the second photosensitive element, so that an image containing multi-view information or depth information of liquid drops on the surface of the to-be-detected sample is formed on the second photosensitive element. The measuring device has double functions of traditional side-looking measurement and top 3D shape measurement. For a conventional flat sample, rapid and standard contact angle measurement can be carried out by using the first imaging module; for a special sample with a concave surface or a complex shape, the second imaging module can be used for supplementary measurement.

The utility model discloses a high-efficiency bird repelling device for grape planting, which relates to the technical field of bird repelling devices and comprises a support column, a bird repelling mechanism is slidably connected in the support column, a mounting frame is movably connected to the top of the support column, and a rotating mechanism is rotatably connected in the mounting frame. A servo motor drives a first rotating rod to rotate, a first gear and a conveying wheel are synchronously driven to rotate, the first gear is meshed with a second gear, a first bevel gear is made to rotate through a second rotating rod, a second bevel gear is made to rotate through a second rotating rod, and a linkage frame is fixedly connected to the top of the linkage frame, and a supporting rod is fixedly connected to the top of the linkage frame. Meanwhile, the conveying wheel drives the mounting frame and the reflective mirror to horizontally rotate through the conveying belt, and finally vertical-horizontal composite rotation of the reflective mirror is achieved, the irradiation range of the reflective mirror is enlarged, all-directional coverage of the reflection angle is achieved, the irradiation blind area is effectively reduced, and then the bird repelling effect is improved.

The invention relates to the technical field of electroencephalogram signal monitoring, in particular to an electroencephalogram signal abnormal state recognition method based on theta-gamma cross frequency coupling characteristics, which comprises the following steps: acquiring an intra-operative electroencephalogram signal of a patient and segmenting the electroencephalogram signal to obtain segmented electroencephalogram signals; filtering, denoising and self-adaptive artifact elimination processing are carried out to obtain a preprocessed electroencephalogram signal; extracting multi-dimensional electroencephalogram features from the preprocessed electroencephalogram signals, extracting alpha-wave average power, theta-wave phase, normalized instantaneous frequency deviation, gamma-wave amplitude envelope and theta-wave average power by adopting Hilbert transform, calculating theta-gamma coupling strength, constructing a multi-dimensional electroencephalogram feature vector, and calculating the multi-dimensional electroencephalogram feature vector; meanwhile, the explosion suppression ratio of the preprocessed electroencephalogram signals is calculated to serve as an auxiliary feature; and performing anomaly identification based on the multi-dimensional anesthesia state feature vector and the auxiliary feature. According to the technical scheme, the misjudgment risk caused by single characteristic fluctuation can be reduced, and the reliability of electroencephalogram signal abnormity monitoring in the anesthesia process is improved.

The utility model relates to the technical field of aircrafts, in particular to an environment-adaptive intelligent unmanned aerial vehicle navigation device. A self-adaptive environment intelligent unmanned aerial vehicle navigation device comprises an aerial vehicle, a CPU central control module, a gyroscope, a monitoring module, a navigation module and a regulation and control module are arranged in the aerial vehicle, the regulation and control module comprises a speed control unit and a regulation and control unit, the monitoring module comprises a laser radar module and a visual monitoring module, and the navigation module comprises a laser radar module and a visual monitoring module. And the visual monitoring module is electrically connected with the monitoring calibration unit. According to the utility model, the monitoring and calibrating units are located on the same horizontal line and detect obstacles, so that the distance between the camera and the obstacles can be more accurately judged, stereoscopic vision and depth perception are improved, the monitoring range is expanded, blind areas are reduced, fault tolerance is increased, and meanwhile, the computation amount of the CPU central control module is reduced according to monitoring on the same horizontal line; image processing and depth calculation are simplified, and the obstacle avoidance reliability of the navigation device is improved.

The invention discloses a nondestructive testing method and system for grouting compactness of a prefabricated bridge pier duct, particularly relates to the technical field of nondestructive testing of materials, and is used for solving the problem that an existing ultrasonic testing technology is insensitive to microcosmic nonuniformity response of a grouting material. The method comprises the following steps: transmitting a first fundamental frequency ultrasonic incident signal into a prefabricated bridge pier duct, collecting a reflection echo signal, repeatedly executing to obtain a plurality of echo signals, calculating a coherence coefficient, and judging whether the coherence coefficient is higher than a preset threshold value or not to perform macroscopic defect screening. When the coherence coefficient is higher than the threshold value, at least one second fundamental frequency ultrasonic incident signal is emitted, corresponding echo signals are collected, the waveform asymmetry coefficient of each echo signal is calculated, and finally the microcosmic non-uniformity of the grouting material is evaluated based on the variation trend of the waveform asymmetry coefficients under different fundamental frequencies. And comprehensive grouting quality evaluation from macroscopic to microscopic is realized.