79results about How to "Strong damage resistance" patented technology

The invention relates to a small electric unmanned helicopter aerial photography system based on a front-end triaxial-type pan-tilt. The small electric unmanned helicopter aerial photography system is a small unmanned helicopter aerial photography system design mainly comprising a front-end triaxial-type pan-tilt design, a small unmanned helicopter platform design, a ground station design, and a communication system design, and belongs to the technical field of aircraft designs. The aerial photography system is light and flexible, high in integration level, low in noise, small in vibration, good in use maneuverability, low in requirements on the conditions of use environments, site and the like, and capable of realizing the omnibearing photography. The aerial photography system has a high practical value and a wide application prospect in the field of unmanned aircrafts.

The invention relates to a symmetrical noncoherent distance measurement/time synchronism system of a cluster link two-way asynchronous communication channel, belonging to the autonomous technical field of aviation data links, radio navigation and aircrafts. By the invention, a symmetrical noncoherent distance measurement/time synchronism method and a system framework can be realized on a DSP (Digital Signal Processor) of a circuit board and an FPGA (Field Programmable Gate Array). Based on the two-way asynchronous communication link between cluster link member nodes, the noncoherent distance measurement/time synchronism system provides a noncoherent spread spectrum distance measurement principle of a two-way asynchronous communication frame under a comprehensive channel system, constructs a noncoherent spread spectrum distance measurement algorithm structure of the air fleet link two-way asynchronous communication frame in a uniform form by adopting a communication frame based on CCSDS Proximity-1 version-3 and provides two algorithms of base line measurement and time synchronism measurement control: an interprocessor time synchronism recursive algorithm and a Doppler integral compensation algorithm. The invention overcomes the defects of the traditional coherent transferring distance measurement and the two-way synchronous noncoherent distance measurement and provides a distance measurement scheme, in which both parts of the two-way asynchronous communication distance measurement can equally acquire a measurement result.

The invented method includes the following steps: firstly, collecting fingerprint image, making characteristics extraction, encryption processing, printing it on the two-dimensional bar code, concealing the fingerprint information into two-dimensional bar code; collecting two-dimensional bar code image, making image segmentation, filtering, geometric correction and layered pretreatment, identifying and decoding said bar code image to obtain the loaded encrypted information, deciphering said encrypted information to obtain fingerprint characteristic information loaded in two-dimensional bar code, comparing said information with field fingerprint information, making detection so as to implement anti-false authentication of fingerprint.

The invention relates to a piezoelectric type noise sensor and belongs to the technical field of space sensors. The piezoelectric type noise sensor comprises a front cover, a film sheet, a sound sensitizing assembly, a vibration compensating assembly, a shell, a locking bolt, a back cover, a socket and a mounting flange, wherein the back cover is connected with the shell in an interference fit or welding manner; the socket is connected with the back cover through the interface fit or welding manner; and the mounting flange is connected with the shell through a thread or welding manner. According to the piezoelectric type noise sensor disclosed by the invention, in use, an external power supply is not needed, electronic components do not exist inside, the use temperature range is wide, and no limitation of the electronic components exist; and the sensor is manufactured from a high temperature resisting material, the internal electric connection utilizes a spot welding manner, and the sensor can work under the high temperature environment.

Protection against impact damage to delicate items stored in a protective encasement such as cell phone cases is significantly improved by protectively lining the interior of a protective encasement with a unique protective combination. This combination includes a protective inlay or insert of a thermoset viscoelastomeric protector in its static form coated with a compatible and non-confining elastomeric polymer coating. Coating the viscoelastomeric protector with the elastomeric coating necessarily requires retention of an undistorted viscoelastomeric protector in its static form during the formative coating procedure. This can be effectively accomplished by injecting coating under low pressure and high solids coating conditions.

The invention relates to a production internet of things management method. The method comprises the steps of: generating a two-dimension code of a product by a two-dimension code generator, and fixing the two-dimension code to a corresponding component; scanning the two-dimension code of the component by adopting a production internet of things platform, photographing the component and obtaining production tracking data; transmitting the production tracking data to a BIM platform, and visually observing the production state of the component. The production internet of things management method has advantages that the production internet of things method combines the two-dimension code, the production internet of things platform and the BIM platform together and visually feeds back the production tracking data to a three-dimension information model; the two-dimension code is applicable to the field of production tracking; the production internet of things platform is mainly used for user management, process management, two-dimension code scanning, photographing, data uploading and historical data checking; and the BIM takes relevant information data of a construction project as a base of the model, has five advantages of visualization, harmony, simulation, optimization and mappability, and is wider and wider in application.

The invention discloses a flat and lug combined bidirectional diode chip which is processed by a P-type primary wafer; primary oxidization layers are arranged at positions, close to both ends, on two faces of a chip; the two faces of the chip are provided with phosphorous diffusion layers; secondary oxidization layers are arranged on the primary oxidization layers and the phosphorous diffusion layers; lug slots are formed in overlapped regions between the secondary oxidization layers and the primary oxidization layers; silicon nitride passivation layers are arranged on the lug slots; and the surfaces of the two faces of the chip are provided with nickel layers. The invention also discloses a manufacturing process for the flat and lug combined bidirectional diode chip. The manufacturing process comprises the following steps of: oxidizing for the first time, photoetching, diffusing phosphorous, oxidizing for the second time, photoetching the lug slots, passivating, photoetching lead wire holes, electroplating nickel and cutting to obtain the independent chip. The invention has the advantages that: as the mechanical intensity of the wafer and the wafer is hard to smash, the scribing (or cutting) efficiency is improved greatly; and compared with the scribing (or cutting) efficiency in a glass passivation process (GPP), the scribing (or cutting) efficiency is improved by over 40 percent, so the area of the whole graph can be saved by about 20 percent.

The invention belongs to the field of materials, and discloses a metal-based composite material. The metal-based composite material comprises Al2O3 hollow microspheres, silicon carbide, a binder and ametal material, and the particle size of the Al2O3 hollow microspheres is 10-60 micrometres. According to a preparation method of the metal-based composite material, the metal-based composite material is prepared by adopting an infiltration casting method, the Al2O3 hollow microspheres, the silicon carbide and the binder are adopted as a raw material to prepare a ceramic preform with porous property and high strength, and then a metal solution enters the ceramic preform under the action of pressurization and capillary force between the ceramic preforms and is compounded to obtain the metal-based composite material. Through reasonable proportioning and cooperation of the Al2O3 hollow microspheres, silicon carbide particles and silicon carbide whiskers, a ceramic preform material with uniform pores is formed under the effects of full mixing and high-temperature bonding, and after infiltration with the metal solution, the obtained metal-based composite material is small in density whichcan reach 1.87 gram per cubic meter, uniform in texture and high in mechanical strength, the compression strength can be larger than 400 MPa, the plasticity is good, the toughness is high, and the damage resistance is high.

A reciprocating-impact excavating part for use in an excavating machine and having wear-resistant guiding sleeves that are easy to process/assemble/disassemble and are fastened by elongated threaded rods. Wear-resistant guiding sleeves (4) are arranged between impact guiding members (1) and an enclosure (8) and/or arranged between the impact guiding members (1) and rolling friction bodies (7). Impact heads (9) are arranged at one ends or either ends of the impact guiding members (1). Impacting teeth (12) are arranged on impacting teeth bases (11). When guiding threaded rods (13) are separated from the impact guiding members (1), the guiding threaded rods (13) are run through guiding threaded-rod holes (15) to be mated with guiding nuts (14) to fasten the impacting teeth bases (11), the wear-resistant guiding sleeves (4), the impact guiding members (1), and a guiding rod connector (2) into a single-body reciprocating impact frame (16). Alternatively, when the guiding threaded rods (13) and the impact guiding members (1) are a single body, the guiding threaded rod (13) are mated with the guiding nuts (14) to fasten the impacting teeth bases (11), the wear-resistant guiding sleeves (4), and the guiding rod connector (2) into the single-body reciprocating impact frame (16). The wear-resistant guiding sleeves (4) are driven by the guiding rod connector (2) and supported by the rolling friction bodies (7) to make reciprocating movements, thus increasing the practicability and service life of equipment.

The invention relates to an AGV multispectral color discrimination tracking navigation and shape and color positioning method based on a visual identification technology, and the method comprises the following steps of constructing a longitudinal and transverse grid type AGV operation network, employing a plurality of vertical color bands constructed by a first color identifier, employing a plurality of horizontal color bands constructed by a second color identifier. The longitudinal colored bands and the transverse colored bands are respectively crossed to form the longitudinal and transverse grid type AGV operation network, and the intersection points or specific position points of the longitudinal colored bands and the transverse colored bands are the intersection position points or specific position pointsmarked by the specific shapes of the longitudinal colored bands and the transverse colored bands and having both shapes and colors. In the AGV navigation running process, the running route of the AGV is determined through the spectral color visual identification of the longitudinal colored bands and the transverse colored bands, and through visual identification of the position information marked in a shape and color combination mode, the intersection where the AGV passes and the position information are determined, and the AGV runs to a preset terminal point according to the determined running route, the intersection and the position information. The method is applied to the technical field of AGVs.

The invention discloses a marine lifesaving sitting stool which is an upgrade product of a first generation of lifesaving sitting stool. The marine lifesaving sitting stool comprises a stool body, wherein a hand pull ring rope is arranged on the side surface of the stool body, the stool body comprises at least two stool body units which are connected mutually to form one body, each stool body unit is in an integrated sealed hollow structure and comprises a seat body, at least two landing legs positioned under the seat body and a cross plate connected between two landing legs, and the landing legs, the bottom of the seat body and the cross plate surround to define a containing space. The marine lifesaving sitting stool aims at solving the problems that the first generation of lifesaving sitting stool has excessively great floating force when having enough supporting force, the hand pull ring rope of the stool cannot be grabbed easily or firmly and the stool body cannot be used after being punctured by sharp objects when touching the sharp objects.

The invention discloses a river water level visual measurement method without a water gauge. The method comprises the following steps: shooting an image of a complete section of a river by using a camera with calibrated internal and external parameters, and performing nonlinear distortion correction; selecting a waterline area on the measurement section in the corrected image, wherein the size of the waterline area covers the amplitude of the water level; carrying out image segmentation on the selected waterline region by adopting a PSPnet network based on deep learning to obtain a binary image with a river bank as a foreground and a water surface as a background; carrying out horizontal projection on the binary image and searching a maximum gradient value to obtain an observation value of a longitudinal coordinate of a waterline image point; calculating a water line image point ordinate based on a variable-height water surface photogrammetry model iteration water level value, and taking the condition that the difference between the ordinate and the observation value is smaller than the measurement precision as an iteration stop condition to obtain a water level approximate value. Only the flow section terrain needs to be measured, a water gauge and a marker do not need to be installed, and the method has the advantages of being easy to arrange, high in damage resistance and visual in result.

The invention discloses a stretcher. The stretcher comprises a stretcher face and lifting bands. The stretcher face comprises a non-woven fabric layer on the upper side and a water absorbing and retaining layer located under the non-woven fabric layer. The water absorbing and retaining layer comprises macromolecule absorbent resin. The lifting bands are arranged between the non-woven fabric layer and the water absorbing and retaining layer. By the adoption of the technical scheme, the stretcher has the advantages of being small, light, convenient to carry and high in anti-damage capacity, and is quite suitable for emergency transfer of the sick and wounded outdoors. Meanwhile, due to the fact that the non-woven fabric layer is arranged on the upper side of the stretcher face, pus, extravasated blood or other body fluid of the sick and wounded can permeate into the lower water absorbing and retaining layer quickly and dispersedly, liquid can be absorbed and retained by the water absorbing and retaining layer quickly, so that liquid can not be accumulated between the water absorbing and retaining layer and the non-woven fabric layer, and in turn, quick permeation of liquid in the non-woven fabric layer can be promoted.

The invention discloses a method for preparing pouring incense added with environmental-friendly adhesive specially for scented incense, comprising the steps of: (1) diluting and well mixing the environmental-friendly adhesive specially for the scented incense in proportion by utilizing clear water and mixing needed spices of debregeasia hide powder, wood powder, carbon powder, cedar powder, essence, potassium chlorate and the like into a bulk ingredient; (2) adhering a selected small bamboo stick into the diluent of the environmental-friendly adhesive specially for the scented incense, adding the bulk ingredient on the small bamboo stick adhered with the diluent of the environmental-friendly adhesive specially for the scented incense according to a conventional method, putting the small bamboo stick added with powders into a traditional pouring incense machine to complete the processes of powder adding and barrel hitting and successively completing the processes repeatedly according to the different requirements of each pouring incense; and (3) till the last process of covering a skin is completed, basking the ready-made incense on an appointed incense basking shed to be completely basked and taking into a warehouse. In the scented incense provided by the invention, the binding power and functionality of the dedicated environmental-friendly adhesive are just right for forminga strong and tough incense body; therefore, the input cost of a natural adhesive is reduced and the manufacturing time and manufacturing cost can be saved for manufacturers.

The invention discloses an unmanned aerial vehicle autonomous landing method based on two-dimensional code recognition. Multiple pieces of sensor information are fused in different stages, in the initial stage, the unmanned aerial vehicle is mainly guided to fly to a target area through GPS information, and then through visual information search, a ground two-dimensional code is recognized, and coordinates of a landing position are locked. And finally, the height and target coordinates of the four-rotor unmanned aerial vehicle are calculated according to information of multiple sensors, and high-precision local positioning and autonomous landing of the four-rotor unmanned aerial vehicle are achieved through a flight control algorithm. According to the four-rotor unmanned aerial vehicle autonomous landing method based on two-dimensional code recognition, the landing precision and the tracking efficiency are remarkably improved.

The present invention is a kind of simple machine-made plate painting, which itself is a kind of arts and crafts works and decorations in the form of superimposed and restrained characteristic expression by inner and outer double solid base materials. The outer package layer uses CAD as a design tool. And directly use the metal plate mechanism to process and produce the main content and restrained shape of the picture; the substrate [1] layer is made of a metal plate, and the machining process is used to make the picture content together; and through matching and Substrates of various types of decorative boards [2] to express structure and decorative effects; double substrates may be considered as mutual performance or mutual support to reflect. It is also suitable as a kind of integrated method and method structure that not only decorates but also strengthens or protects ordinary decorative panels with independent structural purposes. Afraid of wet and chaotic scenes, it will have a wide range of uses in the construction of camps around the United States, construction and place decoration.