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58results about How to "Solve the problem of disconnection" patented technology

Method and device for realizing software bypass in firewall

PendingCN106603427APrevent affecting experienceSolve CatonData switching networksTraffic capacityPacket loss
The invention provides a method and device for realizing software bypass in a firewall. The method comprises a step of judging whether a current network traffic flow is larger than or equal to a preset flow threshold, a step of calling a pre-packaged software bypass operation interface in a message receiving end function or an important safety service processing function if the current network traffic flow is larger than or equal to a preset flow threshold such that the software bypass operation interface obtains a current CPU use rate and a current network port receiving rate through calling a pre-packaged calculation interface and the software bypass is carried out between preset paired software bypass network ports according to a preset rule when the current CPU use rate and the current network port receiving rate are larger than a current hardware equipment platform safety service processing packet loss threshold value. According to the method and the device, the problem of network jam or disconnection caused by equipment packet loss when current network flow is large or the sudden traffic of a peak time appears and the current network flow reaches the maximum performance upper limit of the safety service processing of a firewall in the prior art is solved.
Owner:OPZOON TECH

Array substrate and manufacturing method thereof, display panel and display device

The invention discloses an array substrate and a manufacturing method thereof, a display panel, a display device. the array substrate comprises a substrate, a lead-out wire and an inorganic insulatinglayer located on one side of the substrate; The substrate has a plurality of connection holes penetrating the substrate and filled with a first conductive material. The inorganic insulating layer isprovided with a first through hole and a second through hole, wherein the first through hole penetrates into the first conductive material and the second through hole penetrates into the lead wire; The second conductive layer is located at a side of the first via hole, the second via hole and the inorganic insulating layer away from the substrate so that the first conductive material and the leadwire are electrically connected through the second conductive layer. Since the electrical connection between the lead wire and the first conductive material can be realized by punching the first through hole and the second through hole after the high-temperature process of manufacturing the lead wire and the inorganic insulating layer is finished, the connection between the signal wire and the traces of the integrated circuit chip is effectively ensured, and the wire breakage defect caused by the expansion of the first conductive material such as copper is solved.
Owner:BOE TECH GRP CO LTD

Method for manufacturing miniaturized fluxgate sensor

The invention provides a method for producing a minimized fluxgate sensor in the micro electromechanical technical field, which comprises the following steps: producing a double-sized alignment symbol; sputtering a bottom layer; flinging positive photoresists, exposing and developing; plating a drive coil and a bottom layer coil of a receiving coil, connecting a conductor with a pin of the coil; removing photosensitive resist and a bottom layer; flinging polyimide, solidifying and polishing; sputtering the bottom layer; flinging positive photoresists, exposing and developing; plating a magnetic core, connecting the conductor with a pin; removing positive photoresists and the bottom layer; flinging polyimide, solidifying and polishing; sputtering the bottom layer; flinging the positive photoresists, exposing and developing; plating the drive coil and a top layer coil of the receiving coil and a pin; removing the photosensitive resist and the bottom layer; and magnetic annealing. The invention solves the problems of the traditional fluxgate sensor of poor stability, poor repetitiveness and poor mass production, ensures that the production technique is compatible with the large-scale integrated circuit technique, can be manufactured by integrating the interface circuit, and is widely applied in a plurality of new fields.
Owner:SHANGHAI JIAO TONG UNIV

Display substrate, manufacturing method thereof, and display device

The invention provides a display substrate, a manufacturing method thereof, and a display device, belongs to the technical field of displaying and at least partially solve the problem that an existingdisplay substrate experiences wire breaking and poor ESD (electro-static discharge). The display substrate includes a base, a first insulating layer arranged on the base, a first signal wire arrangedon the side of the first insulating layer far away from the base, a second insulating layer covering the first signal wire, and a second signal wire arranged on the side of the second insulating layer far away from the base; the first signal wire and the second signal wire overlap; the first insulating layer is provided with a trench; at least the overlay part of the first signal wire is arrangedin the trench.
Owner:BOE TECH GRP CO LTD

Reactive power margin based reactive voltage control system and method of wind power plant cluster

The invention relates to a reactive power margin based reactive voltage control system and method of a wind power plant cluster, and belongs to the technical field of reactive voltage control of a wind power plant during grid-connected running. The system comprises a reactive voltage control module, a switchboard, a wind power plant data processing module, a fan controller, a reactive compensation equipment controller, a fan parameter acquisition device and a reactive compensation equipment reactive power acquisition device. The method comprises the following steps of firstly, calculating reactive power of reactive voltage control of the wind power plant, and determining reactive power which shall be sent from each wind power plant; secondly, optimizing and allocating the reactive power of each wind power plant to obtain the optimized reactive power of each fan and the optimized reactive power of reactive compensation equipment; and finally, adjusting the reactive powers of each fan and the reactive compensation equipment by adjusting a current of a rotor side of each fan and on-off of each reactive compensation equipment. By the system and the method, the problems that the service lifetime of the fan is reduced caused by reactive power of the fan during full power, the wind power plant is not economic in running and the fan gets out of grid can be solved.
Owner:NORTHEASTERN UNIV

Lightning-proof outdoor power distribution cabinet

The invention provides a lightning-proof outdoor power distribution cabinet. The power distribution cabinet comprises a lightning rod, a rainshed, a cabinet body, a grounding copper wire, hinges, a cabinet door, a lock of the cabinet door and an electrical junction box, wherein the rainshed is arranged in the upper portion of the cabinet body, the lightning rod is arranged in the left upper portion of the cabinet body, the cabinet door is arranged on the cabinet body via the hinges, the lock of the cabinet door is arranged in the right side of the cabinet door, the lower end of the cabinet body is connected with the grounding copper wire, and the electrical junction box is arranged in the cabinet body. Due to arrangement of the lightning projection module, the electrical junction box and the rainshed, the lightning proof effect is good under the condition that an impact grounding resistor of the ground network cannot meet the requirements or is not grounded; the lightning-proof device is integrated with the power distribution device to form the lightning-proof power distribution box with both lightning-proof and power distribution functions; and the sealing performance of the electrical junction box is improved to solve the problems of short circuit or circuit break caused by that water or other impurities enter the outdoor distribution box.
Owner:STATE GRID SHANDONG CHANGLE POWER SUPPLY

Strengthening structure for integrated bolting with bar and wire mesh

The invention discloses a strengthening structure for integrated bolting with bar and wire mesh. The strengthening structure is disposed on an M-shaped steel strip at metal mesh lap joint of bolting with bar and wire mesh and comprises two rows of connecting nails. The connecting nails are disposed lengthwise along the M-shaped metal mesh and symmetrically distributed on two sides of a groove on the upper surface of the M-shaped metal mesh. The lower end of each connecting nail is fixed to the upper surface of the M-shaped steel mesh. The upper end of each connecting nail is inserted into one mesh of the metal mesh at the metal mesh lap joint. The strengthening structure has the advantages that the when the metal mesh bears acting force of surrounding rock, the connecting nails keep even stress of the metal mesh connection, prevent breakage of part of the metal mesh lap joint caused by stress concentration and effectively prevent pocketing; bolts, the M-shaped steel strip and the metal mesh are integrally connected by the connecting nails, mutual action of the M-shaped steel strip and surrounding rock is enhanced, diffusion range of bolt load to the surrounding rock is increased, and overall strength and reliability of bolting with bar and wire mesh are improved.
Owner:CHINA UNIV OF MINING & TECH

Gluing information detection method based on structured light measurement

PendingCN110530273ASolve the disconnection of structured light imagesImprove accuracyImage analysisUsing optical meansCharacteristic pointStructure based
The invention discloses a gluing information detection method based on structured light measurement. The method comprises the steps of (1) carrying out image processing on a glue strip contour structured light image, segmenting a bottom straight line section, and carrying out the fitting to obtain a bottom reference line, (2) calculating an included angle theta between the bottom reference line and an x axis of a light plane coordinate system, rotating the glue strip contour -theta degrees, removing the bottom straight line section, and calculating a glue height feature point and a glue widthfeature point in a glue shape contour section formed by remaining contour points, (3) obtaining a plurality of glue height feature points, calculating a normal line, constructing a plane I according to the normal line, selecting a preset frame image, projecting glue height feature points and the glue width feature points in the preset frame image to the plane I, calculating a glue height by utilizing the glue height feature points, recording a distance between the glue width feature points as a glue width, and (4) repeating the steps (1), (2) and (3) for other to-be-detected positions in a gluing track to complete the detection of glue strip information in the whole gluing track. According to the method, the angle deviation is corrected, and the gluing three-dimensional contour informationcan be accurately obtained.
Owner:易思维(杭州)科技有限公司

Method for making RF solenoid micro-inductor based on micro electro-mechanical system

The invention relates to a method for making audio frequency follow-up coil micro inductor based on micro Electro-Me-Chemical System. It adopts micro Electro-Me-Chemical System technology to process the cleared glass substrate to obtain two-sides nicking align sign to elevate the align accuracy when exposing; it adopts quasi-LIGA technology and thickness photoresist craft preparing the coil and photoresist die of the connecting conductor; it adopts electroplating technique to resolve the coil coiling and connecting conductor; it adopts medlin material as insulating layer and glazing technique to resolve the compression of the substrate; it adopts physics etching technique to detach the electric plating used conductor.
Owner:SHANGHAI JIAO TONG UNIV

Internet of things-based satellite production site real object directional perception method

The invention provides an internet of things-based satellite production site real object directional perception method. According to the method, firstly, at least three UWB positioning base stations are installed on a satellite production site and then a UWB data network is constructed. According to the actual layout of a production workshop, a production workshop layout diagram of which the ratiois 1: 1 is drawn. The production workshop layout diagram is sent to a server and a client. After that, a laser measuring instrument is adopted to measure the coordinate positions of all nodes on theproduction workshop layout diagram and the boundaries of production stations and then UWB positioning tags are controlled to emit microwave signals. UWB positioning base stations convert received microwave signals into digital signals, and send the digital signals to the server. The UWB positioning base station positioning system of the control server is controlled to calculate the position information of each tag and the calculated position information is stored in the database of the server. Finally, the pointing of the client is obtained and sent to the server. As a result, the directionalperception of the production station area and the directional perception of production resources are achieved.
Owner:BEIJING SATELLITE MFG FACTORY

Micro-grid communication control method, device and system

The invention discloses a micro-grid communication control method, device and system. The method comprises the steps of: obtaining a communication mode parameter value set by a communication node sensor arranged in a micro-grid sub-system; judging whether the communication mode parameter value is a first communication mode parameter pre-set value or not, wherein the first communication mode parameter pre-set value is used for indicating that the communication mode of the micro-grid sub-system and a micro-grid parent-system is wireless network communication; and if so, controlling the working state of a communication mode switching module arranged in the micro-grid sub-system to a wireless network communication state, so that the communication mode of the micro-grid sub-system and the micro-grid parent-system is wireless network communication, wherein a communication node in the micro-grid sub-system sends communication data to the micro-grid parent-system through a wireless network. According to the micro-grid communication control method, device and system disclosed by the invention, whether a wired network fails or not is determined through the communication mode parameter value;furthermore, uninterrupted communication between the micro-grid sub-system and the micro-grid parent-system during the fault period of the wired network can be ensured; and the offline problem of themicro-grid sub-system is solved.
Owner:紫石能源有限公司

Safety operation and maintenance system based on comprehensive law enforcement management platform

The invention relates to a safety operation and maintenance system based on a comprehensive law enforcement management platform, and belongs to the technical field of information communication. The system comprises a comprehensive law enforcement management platform, an information security system and a data interaction system. The comprehensive law enforcement management platform comprises a service user module, a service presentation layer module, a service application layer module, an application support layer module and a data resource layer module. The information security system comprises a unified identity authentication module, a webpage tamper-proof module, a data backup mechanism module, an IP limit control module, a data authority management module and a message encryption mechanism module. And the data interaction system comprises a Web Service interface, a JMS interface, a DBMS interface, a URL interface and a big data interface. The system can be widely applied to law enforcement departments such as environmental protection, traffic, agriculture, culture, markets, water affairs, food and medicine, housing construction and the like.
Owner:青岛一凌网集成有限公司

Processing system and method for automatically connecting remote USB device

The invention discloses a processing system and a processing method for automatically connecting a remote universal serial bus (USB) device. The method is used for providing a user computer to connect or disconnect the USB device through a network system and a USB server which is connected with the USB device, and comprises the following steps that: the user computer searches a USB device which can be used by the user computer from the USB server through the network system; when detecting that the user computer transmits request information, the USB server establishes connection between the user computer and the USB device, and the USB device executes corresponding service according to the request information transmitted by the user computer; and after detecting that the USB device has finished the corresponding service according to all request information transmitted by the user computer, the USB server interrupts the connection between the user computer and the USB device. The invention solves the problems of unused busy line and the like, so that the user executes the service request process more easily.
Owner:KCODES CORPERATION

DFIG and SVC reactive emergency coordination control method in wind power plant

The invention discloses a DFIG and SVC reactive emergency coordination control method in a wind power plant. The method comprises steps of setting a reference voltage threshold value of DFIG participating in reactive power support and a reference voltage threshold value of SVC switching operation; based on a grid-connected point voltage, a DFIG terminal voltage and the Crowbar protection action information, adjusting operation states of a wind turbine generator and the SVC; calculating the limit reactive adjustable quantity of each reactive compensation device based on multiple adjustable states; performing reactive power adjustable quantity distribution in the wind power plant, and calculating emergency reactive power adjustable quantities of a wind turbine generator and SVC equipment; and after that the voltage is recovered to a normal control range is ensured, performing a conventional reactive power allocation scheme of the wind turbine generator and the SVC equipment. The DFIG andSVC reactive emergency coordination control method in a wind power plant is advantaged in that on the premise that a multi-direct-current weak sending end system has an alternating-current and direct-current cascading fault, based on the basic principle of near-region wind power plant reactive power source coordination control, the dynamic reactive response characteristics of DFIG, SVC and otherdevices in the wind power plant are fully utilized, and a problem that large-scale off-grid of a draught fan is caused by large-amplitude fluctuation of a grid-connected point voltage of a wind powerplant in the fault period is further solved.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING) +3

Repair method and device for flexible display panel and flexible display panel

The invention discloses a repair method and device for a flexible display panel and the flexible display panel. The repair method for the flexible display panel comprises the steps of providing a substrate, wherein the substrate comprises a first surface and a second surface which are oppositely arranged; forming a flexible substrate on the first surface, wherein the flexible substrate comprises aplurality of bubbles which protrude along the direction far away from the substrate; forming an active layer on the flexible substrate, wherein the active layer covers the plurality of bubbles; forming a gate on the surface, far away from the flexible substrate, of the active layer; carrying out laser irradiation in an area, covered with the bubbles, of the gate to form a through groove which penetrates through the active layer, the gate and the flexible substrate; and dropwise adding a metal solution to the through groove and solidifying the metal solution to form conductive connectors, wherein the plurality of conductive connectors are electrically connected with the active layer at two sides of the through groove and are insulated with the gate. According to the repair method for the flexible display panel, the problem of poor display performance caused by the bubbles of the flexible display panel can be solved, so that the production yield of the flexible display panel is effectively improved.
Owner:WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD

Method and device for positioning reason of loss of communication, electronic equipment and storage medium

The embodiment of the invention relates to the field of fault detection, and discloses a method and device for positioning a reason of disconnection, electronic equipment and a storage medium. The method comprises the following steps: acquiring a lost connection gateway of a lost connection reason to be positioned; obtaining an adjacent gateway of the off-network gateway, wherein the distance between the adjacent gateway and the off-network gateway is within a preset range; acquiring operation data of adjacent gateways, and positioning the reason why the gateway is out of communication. By adopting the method provided by the embodiment of the invention, the reason of disconnection between the gateway and the service platform can be accurately positioned.
Owner:CHINA MOBILEHANGZHOUINFORMATION TECH CO LTD +1

Doubly-fed generator control method and device

The invention discloses a doubly-fed generator control method and device. The doubly-fed generator control method includes the steps that voltage phase angle variable quantity of a power grid is obtained, wherein the voltage phase angle variable quantity is the difference value between the voltage phase angle when the power grid is normal and the voltage phase angle when the power grid fails; when the power grid returns to normal from the failure, the voltage phase angle variable quantity is compensated to the voltage phase angle of a doubly-fed generator. The voltage phase angle variable quantity between the power grid before faults and the power grid after the faults is calculated, and the variable quantity is compensated to the voltage phase angle of the doubly-fed generator when the power grid returns to normal from the faults, therefore, the situation that the phase angle of the doubly-fed generator jumps to break away from the grid when the voltage of the power grid recovers is avoided, and the effect that the doubly-fed generator operates continuously without getting off the grid in a certain period of time is achieved.
Owner:SINOVEL WIND GRP

Wireless ad hoc network method and system applied to intelligent electronic lock

ActiveCN110392373ASolve the problem of signal blind areaAvoid problemsNetwork topologiesHigh level techniquesIntelligent NetworkIslanding
The invention discloses a wireless ad hoc network method and system applied to an intelligent electronic lock. The method comprises the steps that 01, before an intelligent electronic lock sends a data packet to a server, whether a GPRS signal exists or not is judged, if so, the step 02 is executed, and if not, the intelligent electronic lock waits for a wireless ad hoc network; 02, the intelligent electronic lock sends a networking information packet to the periphery, and initiates a wireless ad hoc network; and step 03, the intelligent electronic lock receives the networking information packet, calculates and obtains the networking information packet of the intelligent electronic lock according to the networking information packet, sends the networking information packet to the periphery, and cycles the step until the wireless ad hoc network is completed. According to the method, the problem of signal blind areas of containers and other intelligent electronic lock products using themethod under the stacking condition and the problem of communication loss caused by equipment 4G (or 2G, 3G and other cellular networks) faults are effectively solved, meanwhile, intelligent networking and data exchange of the intelligent electronic locks can be achieved, and existence of information isolated island equipment is avoided.
Owner:深圳市久通物联科技股份有限公司

Manufacturing method of micro fluxgate sensor with amorphous magnetic core

The invention discloses a manufacturing method of a micro fluxgate sensor with an amorphous magnetic core, belonging to the technical field of micro electronmechanical systems. The manufacturing method comprises the following steps of: sputtering a Cr / Cu bottom layer on one surface of a substrate; spinning a positive photoresist and baking to obtain bottom coils of an excitation coil and an induction coil and photoresist graph of a positioning mark; electroplating the bottom coils and the positioning mark; spinning the positive photoresist to obtain a bonding conductor and the photoresist graph of the positioning mark; electroplating the bonding conductor and the positioning mark; removing the photoresist and etching the Cr / Cu bottom layer; spinning polyimide; spinning the polyimide, adhering prefabricated amorphous magnetically soft alloy magnetic cores one by one and baking; spinning the polyimide, baking and curing; polishing the polyimide until the bonding conductor is exposed; sputtering the Cr / Cu bottom layer; spinning the positive photoresist and baking to obtain the top coils of the excitation coil and the induction coil and the photoresist graph of an electrode; electroplating the bottom coils and the electrode; and removing the photoresist and etching the Cr / Cu bottom layer to obtain the sensor which has high sensitivity and wide linear measurement range.
Owner:SHANGHAI JIAO TONG UNIV

High-speed industrial communication system based on OFDM

The invention provides a high-speed industrial communication system based on OFDM and a control method. The high-speed industrial communication system based on the OFDM communication system comprisesa plurality of node devices and at least one two-wire system field bus. Transmission ports of the node devices are connected to the two-wire system annular field bus. The plurality of node devices areconfigured to communicate with each other in an OFDM modulation mode. Each node device sends modulated data signals to the two-wire system annular field bus in a broadcast mode, and the other node devices directly receive the data signals from the two-wire system annular field bus. The two-wire system annular field bus based on OFDM is used so that the problem of network disconnection caused by accidental disconnection of bus nodes or transmission lines can be effectively solved, meanwhile, high multi-path interference resistance is achieved, and multi-user, high-real-time and high-reliability data transmission can be achieved.
Owner:北京神经元网络技术有限公司

Anti-counterfeiting method and system for products based on material marking block chain

The invention discloses an anti-counterfeiting method for products based on a material marking block chain. The method comprises the following steps of product material marking, marking information and product information chaining, two-dimensional code generation, chained information query and offline inspection. The invention discloses an anti-counterfeiting system for the anti-counterfeiting method for products based on the material marking block chain. The anti-counterfeiting system comprises a material marking module of a product, an upper chain module of marking information and product information, a generation module of a two-dimensional code, a query module of on-chain information and an off-line inspection module. The problem of authenticity of off-chain products is solved throughthe material marking technology; the authenticity of the information on the upload chain is ensured by using a block chain technology. Two-dimensional code technology is utilized to solve the problemthat information on a chain and information off the chain are not interconnected, and firm connection is established between a product off the chain and the information on the chain.
Owner:GUANGDONG UNIV OF TECH

Underwater vehicle scheduling management system and method based on Beidou intelligent buoy

The invention discloses an underwater vehicle scheduling management system and method based on a Beidou intelligent buoy, and relates to the technical field of underwater vehicles, the system comprises a command center, a Beidou buoy and an underwater vehicle; the command center is used for receiving information data of the underwater vehicle; the Beidou buoy is connected with the command center and receives the dispatching information of the underwater vehicle issued by the command center, and the Beidou buoy can transmit own data, time data and the received dispatching information of the underwater vehicle to the underwater vehicle through underwater acoustic communication; the underwater vehicle can analyze the position and scheduling information sent by the Beidou buoy, and carries out corresponding operation according to an information instruction. The system utilizes a short message transmission function and an underwater acoustic communication technology of a Beidou satellite navigation system to realize information interaction between an underwater vehicle taking a Beidou intelligent buoy as a relay and a far-end command center.
Owner:济南星达电子科技有限公司

Medical information management method and system based on big data

The invention belongs to the technical field of medical treatment and public health, and discloses a medical information management method based on big data. The method comprises the steps of S1, collecting physical examination data of people, wherein the physical examination data includes personal identity information data and personal health condition information data; S2, acquiring disease diagnosis and treatment data of people, wherein the data includes personal identity information data and personal treatment condition information data; S3, based on personal identity information data included in the health examination data and the disease diagnosis and treatment data, performing data fusion processing on the health examination data and the disease diagnosis and treatment data; S4, according to the fused medical information data, generating prediction basic data used for predicting future expected health time of the person; and S5, completing prediction calculation of the future expected health time of the person, and generating future health examination suggestions about the person. The fusion of the health examination data and the disease diagnosis and treatment data is realized, and the future expected health time of the person can be predicted based on the living habit of the person.
Owner:阜外华中心血管病医院

A 3D printing equipment and construction method for cement concrete pavement

The invention relates to a cement concrete pavement 3D printing equipment and a construction method, belonging to the technical field of pavement paving. The equipment includes vehicle-mounted system, batching system, control system, printing system and leveling system. Among them, the batching system is set on the vehicle-mounted system, the batching system is connected to the printing system, and the printing system is equipped with a control system. Through the printing system and the control system, the Concrete is laid on the road surface, and the printing system is equipped with a leveling system, which can level the road surface paved with concrete. The invention combines 3D printing technology with concrete pavement technology, uses a mechanical arm to replace the portal steel frame used by traditional 3D printing machines, realizes the three-dimensional movement of the machine, and installs the mechanical arm on the vehicle-mounted system, so that the machine can Moving around makes the printing area unrestricted, realizing large-scale, integrated and fast printing construction on the road.
Owner:SHANDONG UNIV

A differential speed plot seeding device

A differential-speed plot seeding device, including a seed storage mechanism, a seed metering mechanism, and a sorting mechanism. The seed storage mechanism includes a seed pouring funnel, a seed storage tube, a lifting lever and a lever base, which are used to put and store seeds, and the lifting lever It is used to drive the seed storage cylinder to lift upwards, and the seeds are filled; the seed metering mechanism includes a cone, a parallel inclined plate type seed transport grid, a differential transmission device and a stepping motor, and the stepping motor provides power, through the differential transmission The device realizes the differential rotation of the cone and the parallel inclined plate type seed grid, and the parallel inclined plate type seed grid is divided into multiple spaces by multiple parallel partitions; the sorting mechanism includes a seed collection funnel, a seed divider and a DC motor , the DC motor rotates at a high speed to evenly distribute the seeds falling from the seed opening into each row. The differential speed seeding method solves the problems of unevenness between rows and low precision; the use of parallel slanting plate seed transport grids to divide the space solves the problem of seed interruption caused by the presence of partitions in the seeding machinery.
Owner:CHINA AGRI UNIV

Manufacturing method of micro fluxgate sensor with amorphous magnetic core

The invention discloses a manufacturing method of a micro fluxgate sensor with an amorphous magnetic core, belonging to the technical field of micro electronmechanical systems. The manufacturing method comprises the following steps of: sputtering a Cr / Cu bottom layer on one surface of a substrate; spinning a positive photoresist and baking to obtain bottom coils of an excitation coil and an induction coil and photoresist graph of a positioning mark; electroplating the bottom coils and the positioning mark; spinning the positive photoresist to obtain a bonding conductor and the photoresist graph of the positioning mark; electroplating the bonding conductor and the positioning mark; removing the photoresist and etching the Cr / Cu bottom layer; spinning polyimide; spinning the polyimide, adhering prefabricated amorphous magnetically soft alloy magnetic cores one by one and baking; spinning the polyimide, baking and curing; polishing the polyimide until the bonding conductor is exposed; sputtering the Cr / Cu bottom layer; spinning the positive photoresist and baking to obtain the top coils of the excitation coil and the induction coil and the photoresist graph of an electrode; electroplating the bottom coils and the electrode; and removing the photoresist and etching the Cr / Cu bottom layer to obtain the sensor which has high sensitivity and wide linear measurement range.
Owner:SHANGHAI JIAOTONG UNIV

Flight control method and system for unmanned aerial vehicle cluster under fault condition

The invention provides a flight control method and system for an unmanned aerial vehicle cluster under a fault condition. The method comprises the steps that a ground platform terminal periodically monitors the operation state of each unmanned aerial vehicle; when the target unmanned aerial vehicle is monitored, the ground platform terminal judges whether to establish a remote connection channel with the target unmanned aerial vehicle through a preset remote desktop program, wherein the operation state of the target unmanned aerial vehicle is a fault state; if yes, the ground platform terminal sends the control information to the target unmanned aerial vehicle through the remote connection channel; and the target unmanned aerial vehicle executes a flight action corresponding to the control information. The control effect of the unmanned aerial vehicle cluster can be improved.
Owner:HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY

LED flip chip packaging technology-based LED screen packaging process and LED screen

The invention relates to an LED flip chip packaging technology-based LED screen packaging technology and an LED screen, and the packaging technology comprises the steps: welding an IC, a resistor, a capacitor, a power supply seat and a connection terminal on a PCB, and obtaining a first PCB; cleaning the first PCB, and uniformly expanding the plurality of LED flip chips by using a wafer expander; printing solder paste on the first PCB, fixing LED flip chips on the first PCB through a die bonder, enabling every three LED chips to form a pixel point, detecting the pixel point through AOI detection equipment, and putting qualified LED chips into a reflow soldering furnace to be welded into a second PCB; using the AOI detection equipment for detecting the second PCB, using a molding press to carry out out vacuum molding on the qualified second PCB to obtain a third PCB, after baking molding is carried out, according to the needed specification and size, cutting off unnecessary process edges, and carrying out coating or film pasting is carried out on the lamp face of the module. The surface is made to be black, the contrast ratio of the product is improved, and the color uniformity and consistency are improved, and the display effect is better; and each pixel point only needs six metal bonding points, so that a wire bonding link is omitted.
Owner:江西兆驰晶显有限公司
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