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1840results about How to "Easy to implement" patented technology

Novel monitoring and protecting system for test thyristor of converter valve module

ActiveCN102035189AClear design ideasEasy to implement
The invention relates to the field of power system devices, in particular to a novel monitoring and protecting system for a test thyristor of a converter valve module. The system provided by the invention comprises thyristor electronic equipment (TE), valve-based electronic equipment (VBE), a control protection system and the like. The control protection system computes the triggering angle of the thyristor according to the current operation condition of a converter valve and sends the triggering angle to the VBE, the VBE generates a triggering coded pulse and sends the triggering coded pulse to the TE, and the TE generates a triggering pulse and sends the triggering pulse to the thyristor, thereby triggering the thyristor. The TE generates a monitoring and protecting return pulse according to the state of the thyristor, the return pulse is transferred to the VBE through an optical fiber, the VBE gathers the uploaded state information, then the gathered information is uploaded to the control protection system through a CAN (Controller Area Network) bus, and the control protection system finishes the process of monitoring the state information of the valve module thyristor level. In the normal operation process of the converter valve, if the voltage received by the thyristor exceeds the tolerance capability of the thyristor, the thyristor can be damaged possibly, thus the protection technology of the thyristor is very important. The control protection system, the VBE and the TE finish the protection of the normal operation of the converter valve module.
Owner:CHINA ELECTRIC POWER RES INST +1

Aluminum-silicon alloy refining agent and preparation thereof

InactiveCN101343699Asimple methodeasy to implement
The invention relates to an aluminum silicon alloy refining agent and the manufacturing method, which belongs to the aluminum silicon alloy refining agent research and development field. The aluminum silicon alloy refining agent is configured of potassium chloride, sodium chloride, zinc chloride, sodium fluoaluminate, sodium fluosilicate, sodium nitrate, graphite powder, charcoal powder, hexachoroethane, sodium fluoborate and potassium fluotitanate. The materials are mixed, smashed and pressed into blocks. The using method of the manufactured refining agent: when the temperature of the melted aluminum alloy fluid reaches 720 to 760 DEG C, the refining agent blocks are put into a melting pot to perform the reaction. The reaction time is 10 to 25 minutes. The floating slag is removed, and then the product is cast. The method of the product is simple, the implementation is easy, and when the refining agent manufactured in the method is used for the casting of aluminum silicon alloy, air holes can not be formed on the cast product surface, the content of oxide inclusions in the cast product is obviously reduced, and the cast product quality is greatly improved. The air holes can be reduced by one to two grades. The level of the oxide inclusions is about the second grade. The aluminum silicon alloy refining agent solves the problem that the prior refining agent and the processing method are not ideal.
Owner:营口经济技术开发区金达合金铸造有限公司

Production scheduling system and method using genetic algorithm based on elite solution pool

The invention provides a production scheduling system and a method thereof. The system consists of a terminal of a production planning department, a server and a database for storing historical data. The terminal of the production planning department acquires and finishes data real-timely from the connected information terminals through the server. An order is coded through a genetic algorithm basing on an elite hydrolytic tank. Then, genetic operations such as selective transposition, etc., which are executed and evaluated and optimized layer by layer are implemented to generate an optimal production schedule. Finally, a production scheduling proposal is transferred to a production workshop through the server and feedback data on a processing field are real-timely received for the proposal regulation. The hardware environment of the system can be easily realized, the method of the system combines with a heuristic rule and the genetic algorithm, thus the system of the invention improves the solving result and the operation speed during the solving of the scheduling proposal under the condition that a large number of orders, a multilayer structure and the complex process are provided. The production scheduling system and the method of the invention has the advantages of wide application range, strong expandable type, fast operation speed, good optimal performance, etc.
Owner:永凯软件技术(上海)有限公司

Method for electric power line lightning protection configuration by using electric network lightning disturbance distribution

The invention relates to a method using lightning disturbance distribution to carry out lightening protection configuration of the transmission line, which adopts a computer to processing to the lightening automatic monitoring data, establishes a database and uses a geographical information system and the database as an analysis platform; the method also adopts a grid method to compute lightening parameters and sets an amplitude range for dangerous lightning currents of the lightening disturbance of the objects according to the lightning stroke against ability and the characteristics of ground objects, and acquires the correspondent lightning disturbance distribution according to the amplitude range for dangerous lightning currents and the lightening data computed by the computer; by adopting the reliable index in operation confirmed by the transmission line and the statistic data of the lightning stroke flashover types, the method sets critical density value in the lightning disturbance distribution which can cause lightning strike flashover: the method computes the scale and distribution of the lightning disturbance based on the critical density value and confirms the lightning-proof configuration of the transmission line based on the scale and distribution of the lightning disturbance. The invention can be adopted to judge the correspondent area and probability of 'shielding failure flashover' and 'back flashover' of the transmission line and can effectively configure the correspondent lightning-proof measures of the transmission line based on the characteristics of the two lightning disturbances, thus improving the performance-price ratio.
Owner:NORTH CHINA ELECTRICAL POWER RES INST +1

Vertical returning trajectory design method for carrier rocket

The invention provides a vertical returning trajectory design method for a sub-stage of a carrier rocket. The method comprises: according to flight characteristics of a sub-stage of a carrier rocket, determining a vertical returning launching point or each sub-flight-phase of a vertical returning preset target position, using a three-freedom-degree kinetic model of a sub-stage vertical returning process on an earth spherical model, to generate a vertical returning ballistic trajectory, wherein each sub-flight-phase from sub-stage separation to sub-stage landing includes a posture alignment stage, a deceleration turning stage, a gliding stage, a power deceleration stage, a pneumatic deceleration stage, a vertical dropping stage, or a gliding posture alignment stage, a power deceleration stage, a deceleration stage, and a vertical dropping stage, the kinetic model being determined by flight speed, a trajectory inclination angle, a trajectory rotation angle, speed and position components in a launching coordinate system, an attack angle, a sideslip angle, and a variable thrust factor. The invention also provides a vertical returning trajectory design method for a carrier rocket booster stage and a carrier rocket. The vertical returning trajectory design methods are simple in operation and easy in engineering implementation. Track indexes of each obtained sub-flight-phase satisfy constraint requirements of heat flux peak, dynamic pressure, flight overload, and terminal positions.
Owner:CHINA ACAD OF LAUNCH VEHICLE TECH

All-optical phase noise inhibition method for coherent detection

ActiveCN101917233AEasy to implementlow cost
The invention relates to an all-optical phase noise inhibition method for coherent detection. Aiming at the current situation that the local oscillation coherent reception phase noise characteristic is improved through an ultra-low noise performance light source and complex circuit processing technology at present, the all-optical method is provided to inhibit the phase noise and improve the receiving performance. The method comprises the steps that: through a transmitting terminal, one path of a pair of light carrier waves with relevant properties is loaded with information to form signal light, while the other path is used as coherent light and is subjected to wave combination with the signal light to enter optical fibers for transmission; and a receiving terminal performs frequency mixing on the extracted signal light and coherent light, and photovoltaic conversion and signal demodulation are performed in turn. In the method, the phase noise in the coherent detection is inhibited by utilizing the characteristic that homologous generated light carrier waves have relativity without using a local light source and a complex signal processing process, so the structure is simplified and the cost is reduced. In addition, multiple groups of light carrier waves can be acquired by using the technology of combining a wide-spectrum and multi-wavelength light source with spectral partitioning, so the inhibition of the phase noise in a multi-channel coherent light communication system is easy to realize.
Owner:HUAZHONG UNIV OF SCI & TECH

Method for manufacturing low-carbon and low-silicon steel

The invention relates to a method for manufacturing low-carbon and low-silicon steel. The requirement of the low-carbon and low-silicon steel on low contents of carbon and silicon is surely satisfied via decarbonizing and deoxidizing with an RH vacuum treatment device, as a result, the content of the end carbon of a steel-smelting furnace is increased, the after-blow is reduced, the oxidizability of molten steel is lowered, the cost of deoxidization and alloying is reduced, and the purity of the steel is improved; according to the quality requirement of the steel, the secondary refining of the molten steel can adopt two methods, i.e. RH vacuum treatment or combination of the RH vacuum treatment and LF (Ladle Furnace) refining. By utilizing vacuum natural decarbonization and deoxygenation, brittle Al2O3 impurities generated by aluminum deoxidation are reduced, the cleanliness of the steel is improved, silicon added to the molten steel can be effectively controlled from the steel-smelting furnace tapping to the RH vacuum treatment, C and Si in the steel are easy to control and stable; the Al2O3 impurities generated by deoxygenation are greatly reduced and reasonable Ca deformation treatment is performed, so that the castability of the molten steel is good, and the problem of nozzle clogging caused during continuously casting the type of steel is avoided.
Owner:SGIS SONGSHAN CO LTD

Automatic multi-direction material carrying, loading and unloading equipment

The invention discloses automatic multi-direction material carrying, loading and unloading equipment which comprises a vertical lifting platform, an X/Y direction horizontal feeding device and a loading/unloading working table, wherein the vertical lifting platform is used for carrying a material in the vertical direction; the X/Y direction horizontal feeding device is used for carrying the material on a plane in the X/Y direction; the loading/unloading working table is used for placing, loading and unloading the material; the X/Y direction horizontal feeding device is mounted on the vertical lifting platform; the loading/unloading working table is mounted on the X/Y direction horizontal feeding device; the loading/unloading working table is provided with a loading/unloading manipulator. The automatic multi-direction material carrying, loading and unloading equipment disclosed by the invention is simple in structure, simple to operate and wide in application range, and loading and unloading of multiple materials can be met; by adoption of a PLC controller, the lifting platform can move upwards and downwards, the X/Y direction horizontal feeding device can move horizontally, the materials on the loading/unloading working table can be respectively loaded and unloaded, the control precision is high, automation of carrying, loading and unloading is achieved, the working efficiency of a production line is improved, and the labor and the time are saved.
Owner:UNIV OF ELECTRONIC SCI & TECH OF CHINA

Estimation method for endurance mileage of electric vehicle

The invention discloses an estimation method for endurance mileage of an electric vehicle, which comprises the following steps: 1, collecting battery electric quantity, consumed in the corresponding path, of the electric vehicle, and counting in advance to acquire data of the battery electric quantity averagely consumed by each path; 2, acquiring a running path from the current position to the destination position through a navigation system, and acquiring data of the battery electric quantity needing to be consumed according to the data of the battery electric quantity averagely consumed by each path; 3, comparing the data of the current battery electric quantity of the electric vehicle with the data of the battery electric quantity needing to be consumed; and 4, under the condition that the data of the current battery electric quantity of the electric vehicle is greater than the data of the battery electric quantity needing to be consumed, enabling the electric vehicle to prompt the data of the surplus electric quantity after arrival; under the condition that the data of the current battery electric quantity of the electric vehicle is less than the data of the battery electric quantity needing to be consumed, enabling the electric vehicle to prompt the position information that the electric vehicle can arrive in the running path; and under the condition that the data of the current battery electric quantity of the electric vehicle is equal to the data of the battery electric quantity needing to be consumed, enabling the electric vehicle to prompt that the surplus electric quantity is 0 after arrival. The estimation method overcomes the problem of very poor accuracy of an endurance mileage estimation result in the prior art and realizes accurate prediction of the endurance mileage.
Owner:ANHUI NORMAL UNIV
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