657results about How to "Guarantee safe and reliable" patented technology

The invention provides a cascade megawatt photovoltaic grid-connected inverter, wherein a topology structure of the cascade megawatt photovoltaic grid-connected inverter is composed of two levels, namely a DC/DC (direct current/direct current) isolation level and a DC/AC (direct current/alternating current) output level; the structures of three phases of circuits are the same; the output ends of a power inverter group of each single-phase of DC/DC output level are connected in a star shape; the input sides of power units of each single-phase level are provided with independent PV (photovoltaic) modules of the same structure; the DC/DC isolation level comprises high-frequency DC/AC, a high-frequency transformer and high-frequency AC/DC nodes of each single-phase for realizing isolation and boosting, and reducing the consumption of a switch tube via action of a resonant soft switch; the output level power transformer set adopts a bridge type inverter circuit; and the single-phase output level power units are connected with each other in a cascade mode. Based output cascade, the device can realize megawatt grid connection; as a high-frequency chain technology is used, the traditional low frequency transformer is omitted, and the power density is high; and compared with the existing photovoltaic grid-connected inverter structure, the device provided by the invention has the advantages of high energy conversion efficiency, excellent output energy quality, certain fault-tolerant capability and the like.

The invention relates to a computer interlocking system, which comprises a ground region control center used for real-timely monitoring the train position and outputting the position information of a train; a safe computer interlocking subsystem used for receiving the train position output by the ground region control center, interlocking calculating according to the train position and output a control signal according to the calculation result; an output subsystem used for receiving the control signal output by the safe computer interlocking subsystem and controlling a field device to drive; and a communicating subsystem used for building safe communication connection among the ground region control center, the safe computer interlocking subsystem and the output subsystem. The computer interlocking system has the advantages of suitability for moving block, moving-like block and fixing block with high flexibility; the insurance of safety and reliability of system communication coming from the existence of a standard and safe communication port of the ATS system and ATP system ground ZC; and the support of the three modes of regularity, degradation and backup.

The invention discloses an escape automatic window-breaking system for a passenger vehicle and a control method thereof and belongs to the technical field of safety control of passenger vehicles. Glass embedded with electric heating wires is mounted on a vehicle window of the escape automatic window breaking system for the passenger vehicle, the electric heating wires are connected to a power supply of the passenger vehicle through a power supply main line, and an automatic control system is arranged on the power supply main line. The control method of the escape automatic window breaking system for the passenger vehicle, disclosed by the invention, comprises the following steps: respectively comparing a temperature value T in the vehicle, a smoke fog concentration value Sm and an external impact force P with preset critical values and processing through a controller according to all the values. The escape automatic window-breaking system for the passenger vehicle, disclosed by the invention, can be used for increasing the safety coefficient of the passenger vehicle and protecting the life safety of passengers to the greatest extent, and has important significance in reducing casualties and is wide in application range; and according to the control method of the escape automatic window breaking system for the passenger vehicle, disclosed by the invention, both an automatic control window breaking way and a manual switching way can be realized, and the safety and reliability of the window breaking system can be fully ensured.

The invention discloses an FPGA (Field Programmable Gate Array)-based on-orbit reconfiguration system for a satellite on-board computer. The FPGA-based on-orbit reconfiguration system comprises an on-board FPGA chip, a control FPGA chip and an SPI (Serial Peripheral Interface) flash memory unit, wherein the on-board FPGA chip is internally integrated with CPU cores; the control FPGA chip is used for receiving configuration files, which are uploaded by a communication module of a satellite, for on-orbit reconfiguration, unloading the configuration files in the SPI flash memory unit, and controlling the on-orbit reconfiguration of the on-board FPGA chip; the SPI flash memory unit is used for storing the configuration files required for on-orbit reconfiguration; in the process of realizing on-orbit reconfiguration by means of running a JTAG (Joint Test Action Group) configuration mode, the control FPGA chip reads the configuration files required for the JTAG configuration mode from the SPI flash memory unit, and sends the configuration data to the on-board FPGA chip; in the process of realizing on-orbit reconfiguration by means of running an SPI configuration mode, the control FPGA chip informs the on-board FPGA chip of starting the SPI configuration mode, and the on-board FPGA chip reads the configuration files required for the SPI configuration mode from the SPI flash memory unit.

The invention discloses a stepless regulation constant tension device for a hydraulic winch, consisting of a power pump set, a reversing valve, a hydraulic motor, a winch, a one-way valve, a balance valve and a motor safety valve, wherein the power pump set is connected with an oil inlet of the reversing valve; a first oil exchange port of the reversing valve is connected with an oil return port of the balance valve; an oil inlet of the balance valve is connected with a rope folding side oil port of the hydraulic motor; a rope release side oil port of the hydraulic motor is connected with a second oil reversing port of the reversing valve; an oil outlet of the reversing valve is connected with an oil tank; a control port of the balance valve is connected with an oil path between the rope release side oil port of the hydraulic motor and the reversing valve; the one-way valve is connected between the oil inlet and the oil return port of the balance valve in parallel; the motor safety valve is connected between the rope folding side oil port and the rope release side oil port of the hydraulic motor in parallel; and the winch is connected with the hydraulic motor. The device achieves the function of keeping the tension of a steel wire rope constant when the hydraulic winch is positioned under various work conditions and can be used for carrying out remote on-line adjustment on theoutput capacity of the hydraulic winch. The stepless regulation constant tension device has the advantages of simple structure, low cost, convenience for use and high safety.

The invention discloses an intelligent protection system for forest disasters, which is characterized by comprising a signal acquisition module, a wireless transmission module, a monitoring center, a GIS geographic information system, an alarm module, and a disaster identification module. The system can record a video of the whole process, can well monitor illegal mining, illegal logging and illegal hunting in forests with the aid of far-infrared signal acquisition equipment, and can monitor and alarm for torrential floods, mud-rock flow, landslide, rock falling and other disasters through identification and comparison by an image information and geographic information system. If there is an abnormal situation, the staff switches the camera from an automatic state to a manual state in time, and tracks, positions and amplifies a related target in order to observe the target more carefully and thoroughly.

The invention relates to a video flow filter method and relative filter node, wherein said method only needs to decode part data of video flow, to recognize based on view divide recognize technique. The invention is based on present harmful content automatic recognize technique, to automatically recognize and filter, matched with man-operated recognize mechanism. And it also uses filter technique based on URL. And the filter node comprises video flow delay module, switch module, I frame checking/decoding module, content recognize module and judging module based on mark classify standard. The invention reduces decoded data amount and reduce complexity.

The invention discloses a construction method of a single-pylon cable-stayed bridge without dorsal cables. The construction method comprises the following steps of: (1) preparation before construction; (2) lower bridge structure construction; (3) upper bridge structure construction, which comprises the following construction processes of: lower pylon concrete pouring construction, lower beam construction, middle pylon segmental pouring construction, alternate segmental pouring construction of an upper pylon and a middle suspension cable beam segment and stayed-cable mounting, wherein an integral lifting template is used for segmental construction on both the middle pylon and the upper pylon; and (4) bridge surface system construction. The construction method has reasonable step design, convenient construction, safe and reliable construction, high construction quality, short construction period and less and simple construction hardware equipment and can effectively overcomes the defects and deficiencies of complicated construction process, difficult guarantee of construction quality, various hardware equipment needed, and the like in the construction process of the single-pylon cable-stayed bridge without dorsal cables.

The invention discloses a mechanical property measuring device for natural gas hydrates. The device comprises a data collecting system, a vacuum pumping system, a natural gas pressurization air inlet system and a hydrate reaction still, wherein the hydrate reaction still comprises a reaction still base, an end cover, a force applying rod, a reaction still casing and a reaction bracket, the reaction still casing and the reaction still base are connected through a bolt and are sealed through a sealing ring, the end cover is connected with the reaction still base through a spiral stainless steel pipeline, the force applying rod penetrates in from the top part of the reaction still casing and is sealed through a sealing ring, one end of the force applying rod is propped against the end cover, the other end of the force applying rod is propped against the reaction bracket, a first inlet/outlet and a second inlet/outlet are formed in the end cover, a third inlet/outlet and a fourth inlet/outlet which penetrate through the center of a boss of the reaction still base are formed in the reaction still base, and the four inlets/outlets are connected with the vacuum pumping system and the natural gas pressurization air inlet system. The measuring device can be used for measuring the mechanical property of solids in situ under the conditions of high pressure and low temperature, the usage range of the existing device is expanded, and the measurement accuracy is improved.

The device for detecting sample includes main body, detecting element housed inside the main body fixedly, and material of absorption and transfer. There are following parts setup on main body: gathering unit for collecting external sample, and docking area assorted; opening for application of sample in use for sample liquid to pass through, and result display window in use for observing tested result. Being located inside the opening for application of sample, the material of absorption and transfer keeps connectivity with detecting element so as to raise fluid velocity of detection liquid. Being processed by surfactant, the material of absorption and transfer promotes flow of detection liquid further, shortens detection time without disturbing detected result.

The invention discloses an on-line managing method and system for virtual asset of network game, which is characterized by the following: building on-line managing platform with register, transfer, transaction and payment to support user end; establishing an accommodator between management platform and operational businessman of network game; giving a series of standardizing definition for accommodator; exchanging data between managing platform and game database of operational businessman of network game; realizing on-line register, transfer, transaction and payment of virtual asset of network game for user end.

A method and system for online consignment of the virtual property trading of the network game, the main theory is to setup a trading platform with the function of online payment to support a great deal of dealer terminals, and set an adapter between the trading platform and the network game provider system, by defining a serious of standardization for the adapter, make it possible to perform the data exchange between the trading platform and the game database of the network game provider system, so as to realize the changing of the coincidence relation between the virtual property formed from the network game and the game account through the operation of the user terminal, to realize the really safe consignment of the virtual property of the network game, thus ensure that the virtual property trading of the network game carries out smoothly.

The invention discloses a 5G and WiFi-based safe and intelligent image transmission system and method for an electric power internet of things. The system comprises a video service terminal used for providing an original video data stream; an edge calculation module used for WiFi access authentication and video image processing of the video service terminal and establishing a data bidirectional encryption tunnel with a security isolation device; a 5G base station and a core network which are responsible for establishment and maintenance of a 5G wireless channel of the edge computing module anda data bearing function; a security isolation platform used for isolating and filtering data and establishing an encryption tunnel; an image transmission data center used for monitoring all video service terminals; and an Internet of Things management platform used for completing network topology generation and remote configuration of the edge computing module and the video terminal. According tothe invention, the safety and reliability of the system are guaranteed through access safety authentication of the video terminal and data encryption of the 5G channel, the management modes of various terminals are unified through the Internet of Things management platform, and the operation efficiency of the system can be effectively improved.

The invention discloses an integral lifting template of a main pylon of a single-pylon cable-stayed bridge without dorsal cables and a lifting construction method thereof. The method comprises the following steps of: (1) preparation before construction; (2) lower bridge structure construction; (3) upper bridge structure construction comprising the following construction processes of: lower pylon concrete pouring construction, lower beam construction, middle pylon segmental pouring construction, alternate segmental pouring construction of an upper pylon and a middle suspension cable beam segment and stayed-cable mounting, wherein an integral lifting template is used for segmental construction on both the middle pylon and the upper pylon; and (4) bridge surface system construction. The integral lifting template has reasonable structural design, convenient processing, manufacture, mounting and arrangement, low investment cost, simple construction method and steps and high construction speed and can quickly and safely complete the construction task of the main pylon of the cable-stayed bridge by utilizing simple construction tools and investing less labor, and various technical indexes of the main pylon of the constructed and molded cable-stayed bridge meet the requirements of the design and a construction specification.

The invention relates to a computer language transformation system. The computer language transformation system is used for transforming C language program into MSVL (Modeling, Simulation and Verification Language) program, and comprises a lexical analysis module, a syntax analysis module and a transformation processing module, wherein the lexical analysis module is used for transforming character sequences into word sequences; the character sequences comprise definitions of key words, identification characters, constants, operators, header files and comment lines in C language; the syntax analysis module is used for identifying specific sentences in C language based on related lexical rules of C language specified in yacc (Yet Another Compiler Compiler); and the transformation processing module is used for transforming C language into MSVL language according to a language transformation rule between C language and MSVL language.

The embodiment of the invention relates to a service access method, which can select a target service gateway to be connected according to the current load condition of each service gateway of a user in the regional service cluster, so as to perform subsequent service flow. The embodiment of the invention also provides a corresponding portal switching server and a corresponding service access system. With the service access method, the portal switching server and the service access system of embodiment of the invention, the service access speed of the user can be improved considerably, the service operation of the user is convenient, the system operation efficiency is improved and the safety and reliability of the system are ensured.

The invention provides an isolation double-stage chain type current transformer applied to energy storage of a high-capacity battery. A bidirectional isolation full-bridge current transformer with a high-frequency isolation current transformer is additionally arranged between each H bridge module of a conventional chain type current transformer and the battery, so that a battery side is insulated from a high-voltage power grid. The bidirectional isolation full-bridge current transformer is controlled to keep voltage of a middle direct-current side; meanwhile, secondary pulse power on the battery side of the chain type current transformer can be buffered; a chain type energy-storing current transformer can be used as an interface of battery energy storage and the power grid, so that high-voltage direct-current grid connection can be realized, the power dispatching of the power grid is accomplished, and the volumes of harmonic and filter elements of an energy storage system, which are accessed into the power grid, can also be reduced. According to the isolation double-stage chain type current transformer disclosed by the invention, the requirements on an insulation grade of a battery module can be reduced, the secondary pulse power on the battery side is reduced, and the safety and the reliability of the battery are guaranteed; and meanwhile, different types of batteries with different voltage grades can be accessed so that the isolation double-stage chain type current transformer can be easily produced in a large scale, and is suitable for a large-capacity, high-voltage and grid-connected battery energy storing system.

An integrated device for fumigating, freezing, storing and transporting gametes based on ultra-low temperature liquid nitrogen comprises a movable trolley, a primary liquid nitrogen storage tank, a storage tank thermal insulation cover, a liquid nitrogen recovery tank, a low-temperature valve, a gamete carrier frame and a temperature feedback device. The primary liquid nitrogen storage tank adopts polyurethane insulation materials or vacuum multilayer insulation to keep warm, is provided with a polyurethane insulation cover, and can achieve that the outer surface of a storage tank body does not frost and dew. The primary liquid nitrogen storage tank is design in a form that a cushion chamber and an operating chamber are separated to form a communicating vessel, stability of a liquid level and the temperature of the operating chamber is guaranteed, and serious fluctuation caused in a liquid adding process is avoided. Temperature measuring and displaying functions are provided, and temperature information is used for adjusting the height of the liquid level simultaneously. The integrated device can achieve single-step fumigation and safety transportation of the gametes.