65 results about "Much difficulty" patented technology

The invention discloses a control method of an IPM electromotor for driving an electric motor car. According to the working characteristics of the IPM electromotor used on the electric motor car and the characteristics and advantages of various control methods, a segmental control strategy and a method for accurately detecting the start of the electromotor as well as the position and the rotational speed of a rotator during the operation provided are provided. A hall sensor is used for carrying out the method of rough positioning first and scanning next, so that the relatively accurately positioning of the initial position of the rotation in a static state can be realized, the electromotor can be successfully and easily started no matter in the case of idle load, light load or heavy load,and the reliability of the start and operation of the electromotor can be greatly improved. After the IPM electromotor is successfully started, output signals of the hall position sensor undergo rising edge capturing and trailing edge capturing by using software. According to a signal jumping edge, the position of the rotator is corrected in the cases of a low rotational speed and a high rotational speed. When the electromotor operates, a T method is adopted for speed measurement, and an algorithm undergoes certain adjustment in the cases of the low rotational speed and the high rotational speed. When the position and the rotational speed of the rotator during the operation are correctly detected, the segmental control strategy such as peak torque current control and field-weakening control can be adopted so as to ensure that a peak torque is output during the operation of the electromotor.

The invention provides webpage metadata automatic extraction method and system based on multi-page comparison, belonging to the field of internet information processing. Pages of an internet are organized by utilizing a loose HTML (Hypertext Markup Language), but the HTML grammar is not strictly verified, the semantics and the expression form are mixed together, which brings great difficulty for webpage data extraction. The invention can solve the problem very well. In the invention, based on a hypothesis that a dynamic page is generated by filling different data by the same template, convention derivation can be carried out through comparing a plurality of similar pages, and the template of generating the group of the pages is obtained. The system comprises the following components of: (1) a webpage collector which captures the webpages from a preset website; (2) a webpage classifier which classifies the similar pages into one group; (3) a webpage metadata analysis module which derives the template and extracts metadata; (4) a webpage metadata storage which stores and indexes the metadata; and (5) a metadata search engine which retrieves and displays the metadata.

An analog/digital gain control device avoid some of the requirements associated with the nature of a closed-loop AGC circuits and which meets the remaining requirements without much difficulty uses an analog to digital conversion method that increases the number of effective ADC bits by compressing the baseband input analog signal using a logarithmic circuit. After the compressed analog signal is converted into a digital signal, a digital anti-log process or look-up table (LUT) is used to expand the digital signal back to the original linear scale. The word size of the output of the anti-log process is larger than the input word size due to the nature of the anti-log function. To reduce the word size of the digital signal an open loop normalization technique can be applied.

A method for preparing a chalcopyrite electrode comprises the following steps: choosing chalcopyrite particles; cleaning the chalcopyrite particles, and then drying for later use; weighing 0.5-0.7 g of the dried chalcopyrite particles, grinding into powder of 200 meshes or above, pressing chalcopyrite powder into a chalcopyrite cylinder at the pressure of 1 MPa in a powder compressing machine, and wrapping the chalcopyrite cylinder with a silver foil; weighing 1.2-1.4 g of sodium chloride, meshing into powder of 200 meshes or above, placing sodium chloride in an oven, and drying at the temperature of 150 DEG for 1-5 h; preparing a sodium chloride cylinder containing the chalcopyrite cylinder by use of dried sodium chloride powder; placing the obtained sodium chloride cylinder into a high-pressure assembly for heating, pressurizing and sintering; grinding and polishing the sintered sample to obtain the chalcopyrite electrode. The method solves the problems that chalcopyrite is fragile and poor in ductility, such factors as the electrochemical corrosion result are influenced by mineral paragenesis between chalcopyrite and other sulfides and much difficulty exists in processing and preparing the chalcopyrite electrode.

The invention is a modulation jump technique for jump frequency communication, and its characteristic: it adopts modulation jump technique in jump frequency communication and the signal in the channel is a jump-frequency jump-modulation combined signal. In the jump frequency communication, it adopts a kind of modulating mode at each jump frequency point; the modulating modes at two adjacent frequency points in a jump frequency set can be same or different, but it adopts a different modulating mode at least two or above jump frequency points; the base band modulating mode adopted by a transmitting part at each jump frequency point can jump in a pseudorandom mode or in a regular rule. It adopts base-band modulation jump technique in jump frequency communication, and can make the modulations at different carrier wave frequencies different and the characteristic of communication signal in the channel not constant any more, thus bringing about a very great difficulty in analyzing and decoding to hostile or illegal receiving part. The combination of modulation jump technique with jump frequency communication can further strengthen the anti-capture ability of information transmission in jump frequency communication system.

The invention discloses a charging anti-theft protection method for a mobile terminal. In a charger, a first triode, a second triode, a first resistor and a second resistor are arranged, and a charging detection module and an anti-theft protection module are arranged in the mobile terminal. The charging detection module is used for setting and reading level states of a positive voltage data port and a negative voltage data port in a first interface, thereby verifying whether the charger with the first and second triodes and the first and second resistors is applicable or not, and if the charger does not pass the verification, the mobile terminal enables the anti-theft protection module to deny the charging and automatically adopt the protective measures of deleting sensitive data stored in the mobile terminal, and the like. A thief cannot charge the mobile terminal even though stealing the mobile terminal, and great difficulties are brought by the worthless mobile terminal to the stolen mobile terminal disposal of the thief, so the thief naturally may not steal the mobile terminal, and an anti-theft function is naturally realized.

The invention relates to agricultural mulching film made of bamboo fiber and waste silk non-woven fabric, and belongs to the field of film. The agricultural mulching film made of the bamboo fiber and waste silk non-woven fabric mainly solves the technical problems that existing agricultural film is difficult to be degraded, permeability of soil is seriously reduced, great difficulties are brought to farming, sowing and growth of crops, and serious white pollution is caused. A preparation method of the agricultural mulching film made of the bamboo fiber and waste silk non-woven fabric comprises the steps that a prepared composite adhesive is evenly sprayed on composite fibers of the bamboo fibers and waste silk fibers, desulfurization is conducted through a sodium hydroxide aqueous solution, bleaching, softening and drying are conducted in sequence, prepared agricultural film which is made of plant fibers can be completely degraded after being used for three months, soil pollution Management of users, information categories, map images and information auditingcaused by residues can be effectively avoided, green environmental protection is achieved, the cost is low, and the agricultural mulching film made of the bamboo fiber and waste silk non-woven fabric can be used and promoted in a large area.

The invention provides a method for purifying methyl isobutyl ketone (MIBK) exhaust gas of a vacuum system through utilization of waste air compressor oil and relates to a method for treating industrial organic exhaust gas. The MIBK gas produced in production is difficult to condense and reclaim at negative pressure; mass exhaust gas is discharged by a vacuum pump and enters atmosphere so as to cause serious pollution to environment; and discharged water containing the MIBK brings great difficulty for wastewater treatment. The method modifies a common water ring vacuum pump system and adds an inlet gas distribution pipe in a vacuum buffer tank; the tank is filled with waste air compressor oil; the method adds a circulating water pump and an engine oil saltless water tank; the engine oil saltless water tank is filled with saltless water and the waste air compressor oil; and the inside of the tank is provided with a cooling pipe coil. After the waste air compressor oil and low-temperature water are utilized to absorb the MIBK, gas exhaust of the water ring vacuum pump reaches the requirement of GB16297-1996. The method realizes cyclic utilization of water for the vacuum pump; the saturated waste air compressor oil is absorbed; and the MIBK is reclaimed by a distillation method so that the waste air compressor oil is regenerated.

Because hoist steel wire ropes have to be replaced in time according to a use rule in coal mine and non-coal mine floor model winch multirope vertical shaft hoisting. In the traditional technology of rope changing, as old steel wire ropes occupy permanent crown pulley grooves, new steel wire ropes can not be positioned for no groove, thus, the new steel wire ropes are damaged caused by the mutualextrusion and the roller compaction between the new ropes and the old ropes. The work of rope changing is very difficult. The invention provides a special grooving technology which is essentially applied to replacing steel wire ropes, after the new ropes and the old ropes are synchronously positioned, according to normal construction method, the new ropes and the old ropes are reversely adjusted so that the new steel wire ropes are put into the permanent crown pulley grooves and the old steel wire ropes are put into temporary grooves. Meanwhile, the old ropes can be orderly reclaimed by the temporary grooves. No matter how many ropes, such as 2, 4 or even 6, are replaced by the construction organization at once, the grooving technology is also applied to replacing hoisting ropes.

An upright-standing vertical take-off and landing airplane is designed to solve the technical problems that much difficulty exists in controlling the vertical take-off and landing, hovering and the like of a conventional horizontal vertical take-off and landing airplane, the required cost is relatively higher and the controlling force is insufficient when the airplane uses a pneumatic control plane in the low-speed and idle states in the air. An upright-standing main body is adopted, a jet vane is taken as an airplane control plane, and an engine jet orifice corresponds to the center of the jet vane behind an X-type tail wing in position. The invention has the benefits that the upright-standing vertical take-off and landing airplane is a high-speed aircraft adopting an upright-standing machine body and having the design characteristic that the machine body is fused with a guided missile; owing to the upright take-off, the efficiency of an engine per se can be given into full play and the steering and balancing designs are simplified; the maneuverability is more excellent than that of the conventional layout; the controllability is good and the maneuverability is outstanding; and the airplane on the ground for taking off occupies a small area so as to facilitate hiding.

The invention belongs to the field of boiler water wall detecting and discloses a water wall climbing robot by using an ultrasonic rangefinder for positioning in order to solve the problems that a lot of difficulties caused due to the fact that an existing water wall pipe is large in thickness detection area, scattered in position, and not convenient to detect are brought to staff. According to the structure, synchronous belts, synchronous belt driving wheels, synchronous belt driven wheels and pressing wheel axles are provided; under the condition that the synchronous belt driving wheels rotate, and the synchronous belts simultaneously drive the synchronous belt driven wheels and pressing wheel axles to rotate. A plurality of magnets are inlaid on magnet brackets and adsorbed on the surface of a water wall through magnetic force, when the magnet brackets are clamped on water-cooled pipes, return springs tighten inwards to increase the force of the magnet brackets clamping the water-cooled pipes; accordingly, the grasping force of the robot climbing on the surface of the water wall is further increased, and the robot is prevented from falling down. The actual climbing height is measured by the ultrasonic rangefinder, and when the thickness measured by the ultrasonic rangefinder does not meet the standard, missing points can be positioned immediately and quickly.

The invention belongs to the field of boiler water wall detecting and discloses a water wall climbing robot with magnet brackets connected through dual springs in order to solve the problems that a lot of difficulties caused due to the fact that an existing water wall pipe is large in thickness detection area, scattered in position, and not convenient to detect are brought to staff. According to the structure, synchronous belts, synchronous belt driving wheels, synchronous belt driven wheels and pressing wheel axles are provided; under the condition that the synchronous belt driving wheels rotate, the synchronous belts simultaneously drive the synchronous belt driven wheels and the pressing wheel axles to rotate, and the walking function of the robot is achieved. A plurality of magnets are inlaid on the magnet brackets and adsorbed on the surface of a water wall through magnetic force, and moreover the structure of the magnet brackets can be exactly matched with the radian of water-cooled pipes; due to the fact that the magnet brackets are elastic components, when the magnet brackets are clamped on the water-cooled pipes, the return springs tighten inwards to increase the force of the magnet brackets clamping the water-cooled pipes; accordingly, the grasping force of the robot climbing on the surface of the water wall is further increased, and the robot is prevented from falling down. The water wall climbing robot with the magnet brackets connected through the dual springs is suitable for detecting the thickness of a water wall cladding layer.

The invention relates to a through hole forging forming method. For a blank with the height being greater than 350mm, the forging processing forming of a through hole is very difficult. The invention discloses a special method for forging and forming a through hole in one step in a higher blank. A special laminated small-size straight punching head is designed, so that a cake blank can be heated in one step to forge the through hole; and the problems of material waste and extended processing period due to mechanical processing are avoided.

The invention relates to a filling gun with three in-built hollow valve rods, which is applied on the assembling line of various kinds of vehicles and can be automatically clamped with the tank mouth of an opening-type liquid storage tank of a cooling system, a braking system and a boosting steering system of a vehicle. The filling gun solves the problems of large volume of the filling gun, heavy weight and difficulty for operation as the filling gun needs to be provided with a valve in the inner part to control the opening and closing of vacuum and fluid pipelines and simultaneously needs to be provided with a clamping device for being quickly and reliably connected with the tank mouth of the liquid storage tank. The filling gun comprises a clamping piston, hollow valve rods, a base seat, a base and the like and adopts a mode of three hollow valve rods, the inner part of the hollow structure is provided with filling pipelines. The clamping piston and a clamping jaw are the same one part, the clamping jaw pulls the end of the filling gun into the inner part of the storage tank mouth and clamps the filling gun following with the movement of the clamping piston, and good tightness can be obtained.

The invention discloses an auxiliary device for heat treatment of a sectioned deaerator terminal ring weld seam, which includes an outer ring locking device arranged on the outer periphery of the deaerator terminal ring weld seam, and is arranged on the deaerator terminal ring The inner top ring fastening device on the inner circumference of the weld, the inner top ring fastening device is equipped with a locking support seat, and a number of telescopic support arms are arranged on the outer periphery of the locking support seat, and the ends of each telescopic support arm are respectively against the On the inner surface of the inner top ring fastening device; the outer ring locking device compresses and fixes the heater and insulation cotton on the outer surface of the deaerator weld, and the inner top ring fastening device The insulation cotton on the inner surface of the welding seam of the deaerator is pressed and fixed, and the outer ring locking device and the inner top ring fastening device are set to realize the simultaneous heat preservation of the deaerator welding seam inside and outside, avoiding the end ring welding of the deaerator In seam heat treatment, only the heat loss caused by heat preservation on the outer side of the weld is too fast, and the heat treatment temperature rise is difficult caused by the large internal and external temperature difference, which helps to improve the quality of the project and shorten the construction period.

The invention discloses a six-dimensional rapid high-precision alignment and measurement system based on a zone plate. The six-dimensional rapid high-precision alignment and measurement system based on the zone plate is capable of achieving rapid high-precision spatial reset alignment and measurement. Six-dimensional high-precision alignment is spatial attitude positioning actually, and synchronous measurement in six degrees of freedom is extremely difficult. For instance, currently, according to a latest-generation lithography machine of Advanced Semiconductor Material Lithography in Netherlands, two same-type two-dimensional gratings are used for (two-dimensional) alignment for resetting between a wafer and a projection lens, the direction perpendicular to the grating surfaces is positioned through measurement by laser interferometry, and accordingly a step-by-step detection and adjustment process is required and complicated position relation calibration and coordinated movement between two kinds of measurement are required. As another alignment system and scheme, the six-dimensional rapid high-precision alignment and measurement system based on the zone plate is capable of achieving six-dimensional high-precision alignment and measurement simultaneously and synchronously.

A data statistical system comprises a data base, a code generating module which randomly generates distinct product codes, an output module for outputting the codes of the product codes, a data receiving module for receiving anti-fake codes on anti-fake labels which are randomly relative and the product codes, an inquiring module, an inquiring input module for receiving the anti-face codes to be inquired and the product codes to be inquired, and a display module for displaying an inquiring result of the inquiring module. The anti-fake codes and the product code are generated randomly in the data base, are correlative and unpredictable, so that imitators can hardly copy the anti-fake codes and the product codes. After the data statistical system counts product information, forgery is very difficult for users and true and false of a product can be inquired easily. Forgery is contained and reduced through increasing hazards that the imitators are traced. The invention further provides a data statistical method.

The invention relates to a speed stabilizer, which belongs to a device to make the unstable horizontally rotating object to rotate with uniform speed. Some rotating object rotates faster or slower under the instable external force, which is a big difficulty for the people to use. The invention is to utilize the fluid mechanics principle to design a speed stabilizer, which can make the unstable horizontally rotating object to rotate with uniform speed. For instance, the device can enable the wind power generation equipment to keep uniform rotation when the wind force is unstable. The speed stabilizer decreases the manufacturing cost of the wind power generation equipment, reduces the volume of the wind power generation equipment and decreases the noise of the wind power generation equipment. The speed stabilizer also can cause objects with different rotation speeds to rotate with the same speed; also the device can stabilize the speed of other mechanical equipment or instrument which makes centrifugal motion.

The invention relates to a method for improving the bearing capacity of the single pile of a constructed foundation pile, relates to a method for improving the bearing capacity of the single pile, and aims to solve the problems that a lot of money is wasted, the bearing capacity of the single pile still can't be effectively improved, and much difficulty is increased in the later engineering design, which influences the whole engineering process, even brings potential safety hazard and causes major accidents when design requirements are met and the bearing capacity of the single pile is improved by adopting the conventional method. The method comprises the following main steps: step one, the pretreatment of the pile top of the foundation pile; step two, the static pressure or the dynamic striking of the foundation pile. According to the invention, the method is used for improving the bearing capacity of the single pile of the foundation pile in constructed foundation soil.

The invention discloses an automatic toileting driving device. With Chinese aged society coming, as some persons unable to move freely are difficult to move back and forth on a wheelchair and a bed, adevice capable of combining the wheelchair with the bed together appears, an existing wheelchair bed can treat excrement through multiple times of coordination, and using is inconvenient. The automatic toileting driving device comprises a basis plate, two guiding rails are parallelly arranged at the upper portion of the basis plate, and a moving part is arranged at the upper portions of the guiding rails; a driving part is also arranged at the upper portion of the basis plate, and the driving part is connected with the moving part and drives the moving part to slide along the guiding rails; the moving part comprises driving pulling rods, driven pulling rods, a position-covering-pad device and a toilet bowl device; when patients need to toilet on a wheelchair bed, the moving part is drivenby the driving part to slide along the guiding rails, the position-covering-pad device and the toilet bowl device in the moving part are controlled to be switched back and forth, and the inconvenientusing problem caused when the existing wheelchair bed automatically assists in defecation is solved.

The invention discloses a clamping jig of an automobile compressor. The clamping jig comprises a base and is characterized by also comprises a boss and a baffle plate, wherein a circle of boss is arranged on the base, a round groove is formed in the middle of the boss and is used for holding the automobile compressor, a circle of round baffle plate is arranged above the boss, a gap is formed in the round baffle plate, and above the base, a handrail is arranged at each of the two sides of the boss and is used for moving the clamping jig. By the clamping jig, the problem that much difficulty in subsequent machining of the automobile compressor brings great troubles to production of an enterprise because a good clamping device is not available in the prior art for positioning the automobile compressor is solved, and the clamping jig is simple in structure and can be used to clamp the automobile compressor quickly.

The invention relates to a supporting structure of a wind generating set, in particular to a mixed tower supporting structure capable of being used in a large-size land wind generating set. In the prior art, a supporting structure of the land wind generating set is mainly of a conical cylinder-type tower made of steel, the tower is transported to a wind field after being manufactured in a segmented mode, and then the tower is connected and installed to a foundation ring embedded into a foundation. The height of an ordinary road is limited to 4.5m, however, the diameter of the bottom of a 5MW set in the market has reached 6m; with the development of the wind power industry, the center height of a hub and the diameter of the tower become larger and larger, and especially, the diameter of the lower portion of the tower causes great difficulty to transportation and manufacturing of the tower. The mixed tower supporting structure is divided into two parts, the upper portion is the traditional conical cylinder-type tower made of the steel, the lower portion is other supporting structures, solutions are provided for design and installation of large-capacity wind generating sets and ultrahigh towers, and meanwhile, the economy of the supporting structure of the wind generating set is improved to some extent.

The invention provides a liquid quenching holding furnace. The solidification process of metal is conducted under the opaque state so that the microstructure evolution situation inside the metal before solidification can not be observed, and therefore great difficult is brought to research work. According to the liquid quenching holding furnace, the crystal precipitation behavior inside the metal before solidification can be researched under the situation of a laboratory, the solidification process of the metal can be simulated inside the furnace, the temperature can be rapidly lowered in a forced mode with the combination of an annular chilling block, so that the solidification speed is controllable, and finally the microstructure forms in molten metal at different moments and high temperature can be kept outside the furnace through the liquid quenching method. Multiple liquid quenching samples with the same chemical components and the same treatment conditions can be obtained from the molten metal of the same furnace so that the growth situation of crystals in the solidification process can be observed conveniently and the crystal precipitation behavior of the crystals at each temperature and each moment before solidification can be continuously and effectively researched.

The invention discloses a decoupling method based on a power dispatching management cloud platform. The decoupling design of the power dispatching management cloud platform comprises an infrastructurelayer, a platform service layer and an application service layer. According to the invention, the OMS cloud platform is decoupled; the system is divided into a plurality of function modules which arerespectively deployed in different cloud servers, and each function module is divided and independently deployed in the decoupled system, so that independent operation of the core module and the coreprocess is realized, and operations such as stopping, restarting, deleting, expanding and changing setting can be independently carried out on a certain function module. These operations are directedonly to separate functional modules or devices, rather than the entire system. And the service continuity and dynamic expansibility of the system are improved. The problems that the system is deployed in a centralized mode, the architecture is huge, the construction functions are various, the functions are mutually correlated and restricted, and great difficulty is brought to maintenance and upgrading of the system are well solved.

The invention discloses a wall-climbing robot used for measuring the thickness of a coating of a water wall of a boiler through mathematical modeling, and belongs to the field of detection of the water wall of the boiler. The problems that according to thickness detection of a water wall tube, the area is large, positions are dispersed, measurement is inconvenient, and great difficulty is brought to workers are solved. In the structure of a transmission chain, a main wheel, a secondary wheel and a pressing wheel shaft, under the condition that the main wheel rotates, the secondary wheel and the pressing wheel shaft are simultaneously driven to simultaneously rotate through the transmission chain, and the running function of the robot is realized. The transmission chain is tensioned by a pressing wheel, a driven shaft and a driving shaft together. Wireless data interaction between a wireless transmission circuit I and a wireless transmission circuit II is realized, a detected thickness signal is collected, movement of the wall-climbing robot is controlled remotely, and a worker does not need to enter a hearth to control the robot, so that the workload of the worker is reduced, and the personal safety is also guaranteed.