197results about How to "Consider practicality" patented technology

The invention relates to a method for obtaining failure information of a power system, which uses space electromagnetic field induction to obtain the failure information of an overhead line, wherein failure voltage traveling wave and failure transient state and steady voltage information are obtained through measuring an electric field on the lower portion of the overhead line, failure current traveling wave and failure transient state and steady current information are obtained through measuring a magnetic field, and the failure voltage traveling wave, the transient state and the steady information of the overhead line are obtained through inducing space electric field by using a capacitive electric field sensor. For a small current grounding system, failure direction is calculated through using components of the transient state failure information which is obtained through using the electromagnetic field induction in a characteristic frequency band, and the failure distance is calculated through the failure voltage and the current traveling wave information which are obtained by the electromagnetic field induction for output circuits and distribution lines. The method for obtaining failure information of a power system has the advantages that the failure traveling wave information, the transient state and steady failure voltage and current information are easily obtained, the safety is greatly increased, and the cost is reduced and the like.

The invention relates to an electro-hydraulic automatic shift transmission case control device and method in engineering machinery. The device comprises an engine speed sensor, a torque converter turbine speed sensor, an engine throttle opening sensor, a vehicle speed sensor, a vehicle master controller, an engine throttle execution mechanism, an automatic shift transmission case and an electronic controller. The engine speed sensor, the torque converter turbine speed sensor, the engine throttle opening sensor and the vehicle speed sensor input signals to the electronic controller. The electronic controller is communicated with the vehicle master controller. The vehicle master controller inputs control signals to the engine throttle execution mechanism. The electronic controller inputs the control signals to the automatic shift transmission case. The invention uses different shift modes according to the intention of a driver, realizes the transmission shift of hydraulic engineering machinery in proper time, and ensures the economical efficiency, power efficiency and practicability of the vehicle. During the shifting process, the invention can ensure good gear shifting performance by controlling the engine and improve the comfort of passengers.

The invention relates to a hydraulic mechanical transmission engineering machine automatic gear shifting device and a control method, comprising an electrohydraulic gear shifting device, a microcomputer controller, an engine rotation speed sensor, and a gearbox output rotation speed sensor, a gear shifting handle switch, a gear shifting mode selection switch, an electric control gun position potentiometer and an automatic mode direction switch; the engine rotation speed sensor, the gearbox output rotation speed sensor, the gear shifting handle, the gear shifting mode selection switch, the electric control gun position potentiometer and the automatic mode direction switch input signals to an input port of the microcomputer controller which controls the signals to be output to a gearbox control module through an output port. The invention adopts two gear shift combination, has economics, power and practicability, and reaches the object of saving energy; the automatic gear shifting leads the engineering machine to improve the working efficiency, save the working time, reduce the labor intensity of the drivers, and be suitable for different working conditions.

The invention discloses a residual stress testing method based on the profile method, and an ancillary device. The method is characterized in that a sample is appropriately polished and wiped for pretreatment, and aluminum foils are firmly adhered to cutting paths as transitional belts; the sample, to which the transitional belts are adhered, is cut open through a special linear low-speed wire cutting device along a surface to be detected; the cut surface is scanned through a laser profiler to obtain deformed profile data; and data processing is carried out to obtain displacement changes of points on the cut surface before and after stress relief. The testing method disclosed by the invention has the advantages that finite element analysis is carried out through the stress-strain relationship, so that the residual stress distribution of a whole section is finally achieved; the testing method can achieve the residual stress distribution of the whole section, has no requirements for theshape and the material of a tested component, and has the characteristics of high economy and efficiency, and high simplicity in operation; and through the transitional belts adopted in the method, the influence of edge effect is reduced, so that the testing precision is improved.

The invention discloses a rain wiper control system, which comprises a rain wiper combination switch, a rain wiper motor, a rain wiper low-speed relay and a rain wiper high-speed relay, wherein the rain wiper combination switch is provided with a zero gear terminal, an intermittent gear terminal, a low-speed gear terminal and a high-speed gear terminal; and the rain wiper motor is provided with a high-speed terminal and a low-speed terminal. The rain wiper control system is characterized by also comprising an automobile body controller, wherein the automobile body controller is connected with the rain wiper combination switch; the rain wiper low-speed relay and the rain wiper high-speed relay are connected with the automobile body controller; the high-speed terminal and the low-speed terminal on the rain wiper motor are connected with a power supply after passing through normally open contacts of the rain wiper low-speed relay and the rain wiper high-speed relay. According to the rain wiper control system and a rain wiper control method, control signals are isolated from a driving circuit; a rain wiper rubs glass for consumption to stop an automobile, instantaneous large current cannot be generated, and a phenomenon that contacts of the combination switch are burnt is stopped; and the rain wiper control system meets requirements for practicability and a low fault rate, reflects a humanized design concept, and has a wide market prospect.

A single-power-source automatic double door controlled by a crank-slider mechanism is composed of a right door body, a first shaft, a first connection bridge, a first spring, a first fixed rod, a connecting rope, a fixed pulley, a first fixed disk, a second shaft, a second connection bridge, a second spring, a second fixed rod, a second fixed disk, a door frame, a first pin shaft, a first joint lever, a second pin shaft, a second joint lever, a first slider, a third pin shaft, a third joint lever, a second slider, a fourth pin shaft, a rail, a fourth joint lever, a fifth pin shaft, a third slider, a fifth joint lever, a left door body, a sixth pin shaft, a sixth joint lever, a seventh pin shaft, a lever, a rotation shaft, a fixed block and an ejector rod. Compared with an existing single door, the single-power-source automatic double door can achieve opening and closing of the doors and a lock through automatic control, the operation is easier and more convenient when controlling is performed, the single-action-source automatic double-leave door can be opened and closed both inwards and outwards, and therefore the theftproof performance is better; meanwhile, the single-power-source automatic double door can be made of materials such as wood, metal and glass, and therefore the double door has the advantages of low cost, aesthetic property, practicability and safety.

The invention discloses a dry sheet type facial mask containing active essence and a preparation method of the dry sheet type facial mask, and is characterized in that the facial mask comprises base cloth and solid active essence loaded on the surface of the base cloth, the base cloth is spunlace non-woven fabric containing sodium alginate fibers, and the solid active essence comprises sodium hyaluronate and/or skin care active substances. The facial mask is prepared by adopting continuous production equipment of spunlace non-woven fabric according to the following steps: firstly, compoundingcalcium alginate fibers and hydrophilic fibers to prepare a fiber net, then performing puncturing and reinforcing by adopting a sodium sulfate aqueous solution, and then performing ultrasonic cleaningby adopting absolute ethyl alcohol to prepare the spunlace non-woven fabric; and loading the active essence on the surface of the spunlace non-woven fabric through a printing process, and then performing cutting, folding, disinfection, sealing and packaging to obtain the facial mask. The dry sheet type facial mask containing the active essence is light, thin, breathable, free of preservatives andthickeners, capable of gelating after absorbing water and capable of absorbing water with the amount larger than or equal to 30 g/g, has efficacy, safety and comfort, and is simple in preparation method and appropriate in cost.

The invention discloses an unmanned ship path tracking control method, and belongs to the field of unmanned ship motion control. The invention provides a control method combining an improved LOS guidance law with fuzzy PID to realize unmanned ship path tracking control. An unmanned ship path tracking control system is divided into a guidance subsystem and a control subsystem. The guidance subsystem adopts an improved LOS guidance law, and a variable speed control law is added to a variable forward-looking distance LOS guidance law, so the guidance subsystem provides an expected course and an expected navigational speed at the same time, navigational speed self-tuning of the unmanned ship in the path tracking process is achieved, and the navigational speed influence is reduced. Consideringa complex and changeable marine environment, a control layer adopts fuzzy PID to design a course and speed controller, so the adaptability and robustness of the controller are improved, accurate tracking control of an expected course and an expected speed is realized, and the unmanned ship is ensured to be effectively kept on an expected path. According to the method, the influence of the navigation speed on unmanned ship path tracking control is effectively reduced, and the rapidity and accuracy of unmanned ship path tracking are improved.

The invention discloses a power distribution cabinet. The power distribution cabinet includes an apparatus top rack. A lower part of the apparatus top rack is provided with a protective housing. An upper part of the apparatus top rack is provided with a lifting electric oily cylinder. The lifting electric oil cylinder is connected to a power distribution cabinet body which is sleeved inside the protective housing. The power distribution cabinet body is hinged to a cabinet door through a leaf. A lower part of the power distribution cabinet body is provided with a cabinet body pedestal. The cabinet pedestal is adhered to a sealing rubber pad thereon. The apparatus top rack is provided with a waterlogging sensor thereon. The waterlogging sensor is in electrical connection to a controller which is disposed on one side of the lower part of the apparatus top rack. The lower part of the power distribution cabinet body is connected to a telescopic sleeve. The telescopic sleeve cooperates with a fixing sleeve which is arranged on the ground. The power distribution cabinet can be lift above the ground, can prevent theft and damage, can prevent rain. The design of lifting can prevent moisture, and the power distribution cabinet can be automatically lifted in rainy days, and is easy to control, is compatible with practicality and safety.

The invention relates to an erecting welding technological method for a single-upper-ring type large segmented stand ring with sole plates. A sole plate positioning template and positioning pipes are used for precise positioning; and after splice welding of a lower guide plate, fixed guide vane mounting holes are perforated in a matched mode, and then fixed guide vanes are inserted. The key process problems of stand ring welding deformation, sole plate assembly positioning, sole plate combining through hole processing cost, the production cycle and the like are solved through an auxiliary lower ring, the sole plate positioning templates and the positioning pipes, and the production cost and the production cycle are reduced. According to the stand ring manufactured through the technological method, the problems of assembly positioning, the production cost, welding deformation and the like are effectively solved, and construction site installation requirements are met; the subsequent production cycle and processing cost are greatly reduced, economy and practicability are both considered, and the purposes of lowering cost and improving effects are achieved.

The invention provides a 4-20mA special analogue acquisition module, which comprises an I/V conversion unit, a V/F conversion unit, an opto-coupler isolation unit, a CPLD (Complex Programmable Logic Device) core control unit and multiple paths of power supply units, wherein 4-20mA analogue quantity is converted into a 1-5V voltage signal through the I/V conversion unit firstly; the voltage signal is converted into a 10K-50KHz frequency signal through the V/F conversion unit; the frequency signal is isolated from the CPLD core control unit through the opto-coupler isolation unit; the CPLD core control unit is used for counting, collecting and operating the collected frequency pulse, and is connected with a background device through an I/O port of the CPLD core control unit finally; the information collected by the CPLD is uploaded; the multiple paths of power supply units supply the electricity to the analogue acquisition module; a +5V power source is converted into a +3.3V and a +/-12V power sources to supply power to the module.

The invention discloses an LED (light-emitting diode) street lamp using a lamp shell as a mounting interface support structure. The LED street lamp comprises a lamp shell (101) which is molded by stamping a metal plate, wherein the lamp shell (101) comprises a support panel which is folded to a plurality of blocks; a mounting interface is arranged on the support panel; an LED bulb (102) is arrangd on the mounting interface; and the lamp shell (101) is fixed on a lamp pole (108) through a lamp pole fixing member. The LED street lamp disclosed by the invention has the advantages of being simple in structure, low in cost and rapid, inexpensive and convenient to mount, use and maintain and hard in fault magnification. According to the LED street lamp using the lamp shell as the mounting interface support structure, the bulb of the LED street lamp, the lamp and a lighting control product are independent in production and use, therefore, production links of the LED street lamp can be greatly reduced and mass production is realized, and the LED street lamp using the lamp shell as the mounting interface support structure is beneficial for application and large-scale industrialization of LED energy-saving lighting products.

The invention discloses a constant-speed constant-frequency wind turbine low voltage riding-through device and a control method, wherein the device comprises a network system and access switches connected in series between wind turbines; a contactor and a reactive power compensation module which are connected in series are in parallel connection between one switch and one wind turbine; an active power absorbing loop is connected in parallel between the contactor and the reactive power compensation module; and the switches are electronic switches. When the network system is in voltage sag, the switches are cut off, passages of the wind turbines, for feeding active power to the system, are cut off, the active power absorbing loop absorbs active power sent out by the wind turbines, and the reactive power compensation module compensates reactive power required by normal running of the wind turbines. The invention plays a role of restraining influences brought by voltage sags of the network system to the wind turbines, simultaneously enhances the reliability of power supply of a wind plant, and can reduce conditions that fans in the same wind turbine are forced to be cut off completely due to voltage sag of the network system, the practicability is strong, and great economic benefits are brought.

The invention discloses a three-hole parallel magnetic levitation vacuum tunnel structure. The structure comprises running tunnels on the two sides and a service tunnel on the middle. The running tunnels and the service tunnel are connected through a connection channel, the interiors of the running tunnels are vacuum environments, the bottoms of the running tunnels are in under-rail filling, a magnetic levitation rail beam is placed on the filling face, a magnetic levitation train runs on the magnetic levitation rail beam, the interior of the service tunnel is the normal pressure environment,the bottom of the service tunnel is in filling under equipment, equipment needed by magnetic levitation running is placed on the filling face, other spaces serve as evacuation channels, one end of theconnection channel communicates with the running tunnels, the other end of the connection channel communicates with the service tunnel, and a vacuum isolation wall and a vacuum isolation door are arranged on the connecting position of the communication channel and the running tunnels. The low-vacuum environment can be ensured, the ground space use can be reduced, adaptation to the terrain is high, the tunnel structure with good passenger evacuation, personal inspection and equipment arranging capacity is achieved, and meanwhile, practicability, safety and economy are all considered.

The invention discloses an LED (light-emitting diode) tunnel lamp using a double-faced radiator structure, comprising an extrusion type double-faced radiator (103) which is extrusion-formed by a metal plate, wherein the extrusion type double-faced radiator (103) is provided with an LED bulb (102); the extrusion type double-faced radiator (103) is mounted on a mounting support seat (104); and the extrusion type double-faced radiator (103) is provided with more than one mounting interfaces for mounting the LED bulb (102). The LED tunnel lamp provided by the invention is featured with simple structure and low cost, is mounted, used and maintained fast, cheaply and conveniently, and is capable of not enlarging faults; and independence of bulbs, lamps and lighting control products of the LED lamp for production and use can be realized so as to greatly reduce production links, to realize batch production, and to be beneficial to application and industrial scale of the LED energy-saving lighting products. And the LED tunnel lamp can effectively reduce the problem of glare lighting in tunnels, and therefore, vehicles are driven more securely.

The invention relates to a robot die-casting water outlet production system, which comprises a die-casting machine, a die-casting die, a robot, optical fiber detection equipment, an ultrasonic generator, an ultrasonic positioning jig, a packaging box, a robot control box and a control system. The die-casting die is arranged in the die-casting machine; the die-casting machine opens a die, and a casting piece is formed; the robot control box controls a moving trajectory of the robot; the robot stretches into the die-casting die of the die-casting machine so as to clamp a die-casting piece and atomize, blow and cool a die cavity; the robot clamps the die-casting piece to place into the ultrasonic positioning jig; the ultrasonic generator starts to enable a product to vibrate and separate from a passageway cinder ladle; the robot clamps the separated product to place into the packaging box for packaging.

The invention relates to the technical field of bathroom cabinet wood, in particular to a bathroom cabinet wood pre-treatment technology. The bathroom cabinet wood pre-treatment technology comprises the following steps that S1, wood pre-treatment is carried out; S2, cladding pulp is prepared; and S3, the prepared cladding pulp is coated to a board treated in the step S1. In this way, the wood is treated through an acetylene cutting spraying gun at the high temperature, moisture on the surface of the wood evaporates quickly in the process, meanwhile, the internal texture structure of the wood is not damaged, wee cracks hidden on the surface of the wood expand, and the surface of the wood can be subjected to burr removal treatment at the high temperature. In the coating step, the wood is preheated, the water content of the wood is reduced, on one hand, internal and external temperature of the wood can be coincident, and wood surface cracking and wood internal breakage which are caused bysudden temperature rise are avoided; and on the other hand, the water content of the wood can be reduced, and the absorptivity of the cladding pulp is improved.

The invention relates to a wireless network planning method and device. Due to the wireless network planning method and device, a planned wireless network meets electromagnetic radiation standards while meeting network performance, practicality and safety of wireless network planning are taken into account, 'electromagnetic pollution' generated when electromagnetic radiation exceeds the standards is avoided, and then damage to human bodies and the environment by the 'electromagnetic pollution' is avoided. The method includes the steps that the maximum transmitting power of cell reference marks is determined according to electromagnetic radiation intensity parameters; according to the maximum transmitting power of the cell reference marks, electromagnetic radiation network simulation and network service performance simulation are performed; when an electromagnetic radiation simulation result obtained through electromagnetic radiation network simulation and/or a network service performance simulation result obtained through network service performance simulation do/does not meet preset conditions, the electromagnetic radiation network simulation and network service performance simulation are performed again until the electromagnetic radiation simulation result and the network service performance simulation result both meet the preset conditions.

The invention relates to an RNA in-situ hybridization optimization method for cucumber seedling gene localization research. The method comprises the following steps: firstly, improving a plant culture, sampling and fixing method according to the characteristics of cucumber seedling plant materials so as to obtain a complete plant structure containing target tissues; secondly, optimizing operatingtechniques such as slice preparation, hybridization pretreatment, hybridization incubation slice sealing and chromogenic reaction microscopic examination in a targeted manner so that the reliability,accuracy and specificity of a gene localization result are improved; finally, designing a treatment scheme suitable for cucumber seedling mature tissue after the chromogenic reaction is ended in a targeted mode so that interference of cell inclusions can be eliminated, and directly observing the distribution of hybridization signals. The method is not only used for improving the sensitivity and accuracy of experimental results, but also reduces the economic cost by improving the utilization rate of drugs, reducing the consumption of experimental articles, increasing the yield of reaction products, saving the labor cost and the like, so that the method is a scientific research method considering scientificity, innovativeness and practicability.