172results about How to "Achieve the design purpose" patented technology

The invention relates to a Chinese herbal medicine feed supplement for laying hens in egg laying period. The mass ratio of components of the Chinese herbal medicine feed supplement is hawthorn: medicated leaven: tangerine peel: lycium chinense: milkvetch: ligustrum lucidum ait: motherwort: common selfheal fruit-spike: shorthorned epimedium herb: forsythia: atractylodes: pilose asiabell root: herba houttuyniae: chilli powder: fortune paulownia flower: pine needle powder: dandelion: liquorice root = (0.1-0.2):(0.2-0.3):(0.1-0.3):(0.2-0.6):(0.2-0.6):(1.0-3.0):(1.0-3.0):(2.0-3.0):(1.0-2.0):(0.2-0.6):(0.2-0.6):(0.1-0.5):(0.1-0.5):(0.2-0.5):(5.0-25.0):(5.0-55.0):(5.0-15.0):(1.0-8.0). On the basis of the ratio, the components are dried and smashed to be 80 meshes, the components are mixed uniformly and added into daily ration of the laying hens in the egg laying period with 1% of additive amount, and by means of continuous usage, the Chinese herbal medicine feed supplement has effects that the egg weight is increased, the egg color and the egg quality are improved, simultaneously the organism immunity is improved, the morbidity is reduced, and the like. The Chinese herbal medicine feed supplement has an extremely broad application prospect.

The invention relates to a control method, in particular to a fault-tolerant self-adaptation control method of an automobile active suspension system. The fault-tolerant self-adaptation control method of the automobile active suspension system aims at resolving the problems that an existing suspension control technology design model is relatively simple, cannot meet dynamic performance of the system when an actuator breaks down, and cannot respond to indeterminate interference of the outside world and unmodeled dynamics. The fault-tolerant self-adaptation control method of the automobile active suspension system comprises a first step of building a nonlinear semi-automobile active suspension model, a second step of designing a nonlinear Robust controller, and a third step of adjusting control gain parameters of the nonlinear Robust controller. The fault-tolerant self-adaptation control method of the automobile active suspension system is applied to the field of automobile active suspension control.

The invention discloses a plosive eliminating circuit of an audio system and a mobile communication terminal. The plosive eliminating circuit includes an audio processing circuit, an electroacoustic device and a stopping condenser; audio signals output by the audio processing circuit are output by an audio transmission channel to the stopping condenser; AC signals are output to the electroacoustic device and transformed into sound signals for output after DC bias voltage in the audio signals is isolated by the stopping condenser; a voltage clamp circuit connected on the audio transmission channel is used for clamping a DC level of the audio transmission channel on the level of the DC bias voltage of the transmitted audio signals. As the voltage clamp circuit is smartly designed on the audio signal transmission channel, the invention eliminates plosives output by the electroacoustic device and improves the sound effect quality of the audio system. The plosive eliminating circuit of the invention has simple structure, has no additional hardware cost, cannot cause such problems as output delay and the like, and is suitable for promotion and application in the mobile communication terminals such as cell phones and palm computers.

3780 points discrete Fourier transform processer system includes 63 points DFT module, complex multiplicator moduel, line and column crossing processor module and 60 points DFT module to be connectedin sequence according to the calculation, of which the position of each module in the abovelisted modules can be interchangeable. The processor is structuralized by two modules in front and back to share one FPGA chip and two FPGA chips being connected by two-part RAM. According to the calculation and connecting sequence 63 point DFT module will be formed by 7 point (or 9 point) DFT module-label mapping module under 63 point DFT prime factor calculation-9 point (or 7 point) DFT module, 60 point DFT module can be also decomposed similarly as 3X20, 4X15, 5X12 point DFT as well as 12 point and 15 point DFT module can be decomposed as 3X4, 3X5 point DFT module. The whole 3780 point DFT processor needs only two FPGA chips of three hundred thousand gates for saving a great deal of the cost.

The invention discloses a backlight module for a liquid crystal display device. The backlight module comprises a light source, a rear panel, a light-guiding plate and an optical diaphragm, wherein the light source is used for emitting light; the rear panel is provided with a loading surface and at least one lateral edge; the rear panel is used for loading the light source through the loading surface; the light-guiding plate is located on the light source and is used for guiding the light; the optical diaphragm is used for processing the light after being guided by the light-guiding plate; the optical diaphragm is located on the light-guiding plate and is provided with at least one bending part; and the bending part is connected with the lateral edge of the rear panel, so as to fix the relative position of the optical diaphragm.

The invention relates to a waterproof anti-explosion cable connector, which comprises a plug, a socket, a plug protective cover, a socket protective cover, an outer cover, a rubber sealing ring, a compaction nut, a stop thread, a plug cover, a socket cover, a waterproof O-ring, a rubber spacer, a fixing flange disc and a connection chain. The outer cover is used for fastening the plug protective cover and the socket protective cover; the rubber sealing ring is used for sealing an outgoing line of a cable; the compaction nut is used for compacting the rubber sealing ring; the stop thread is used for plugging off the plug and the socket; and the connection chain is used for being connecting with the plug protective cover. Through the technical scheme of the waterproof anti-explosion cable connector disclosed by the invention, the part of outgoing line of the cable forms a cavity sealed to outside because of the matching of the rubber spacer, the compaction nut and the cable, and a contact surface of a plug part A and a socket part B form an explosion releasing surface, thus outside dangerous gas are not ignited when the inner cavity is exploded, and design purposes of the waterproof anti-explosion cable connector of the invention are realized.

The invention discloses a shelf satellite borne transponder. The shelf satellite borne transponder comprises a radio frequency transceiver module, an intermediate frequency processing module, a secondary power supply module, a duplexer, a relay receiving filter; wherein the radio frequency transceiver module is used for receiving and transmitting radio frequency signals to the ground or to the relay; the intermediate frequency processing module is used for the A / D conversion of received signals, the D / A conversion of reference signals, the acquisition and tracking of pseudo codes and carriers,and the signal processing of channels; the secondary power supply module is used for power supply filter, voltage conversion and transponder switch execution; the diplexer is used for the filtering processing of ground measurement and control radio frequency receiving signals and radio frequency transmitting signals; and the relay receiving filter is used for preselected filtering of relay measurement and control radio frequency receiving signals. According to the shelf satellite borne transponder disclosed by the invention, a unified hardware platform is adopted; and the purposes of general-purpose design, mass production without considering the models and shelf supply can be achieved through changing different software settings and replacing the diplexer and relay receiving filter withdifferent frequency points.

The invention discloses a functional polyester-cotton conducting fiber blended yarn and a processing method thereof, relating to the technical field of spinning engineering. The processing method comprises the following steps of: mixing polyester fibers with compound light-colored chinlon base organic conducting short fibers to manufacture mixed organic polyester conducting fiber raw strips; manufacturing cotton fibers into raw strips and fine combing the raw strips to manufacture fine combing cotton strips; then mixing the fine combing cotton strips and the mixed organic polyester conducting fiber raw strips and then processing the mixed strips through a coarse spinner and a spun yarn spinner; and finally, spooling. The functional polyester-cotton conducting fiber blended yarn can be manufactured into special clothes and textiles being static-free, dust-free, microwave protective, radiation protective, and the like. Proved by detection, the yarn has good electric conduction property and cannot be influenced by environment humidity. After the yarn is spun and processed, the yarn has stiff, smooth and flexible handfeel, drapability, good size stability, good abrasion resistance, comfort, skin fit, good coloring and bright and abundant color and conforms to the application requirement of high-grade clothing fabrics and fashionable dress fabrics.

The invention discloses an observation method and an observation system of a diesel SCR (Selective Catalytic Reduction) system input state. The observation method comprises the following steps that Step 1, a state space model is established according to a chemical reaction in an SCR system; Step 2, the state space model is combined with an EKF (Extended Kalman Filter) equation, wherein the EKF equation comprises a prediction equation, namely x(k) is equal to f[x(k-1),u(k)] plus w(k), and a renewal equation, namely z(k) is equal to h[x(k)] plus v(k), x(k) represents a state vector, u(k) represents an input vector, w(k) represents a gaussian process noise, z(k) represents an observation vector, h(x) represents an observation function, and v(k) represents a gaussian observation noise; and Step 3, the EKF algorithm mentioned above is encoded with software, and computational simulation is performed, thereby obtaining an input concentration estimated value. According to the observation method and the observation system, the method expanding Kalman filters to perform input state observation is designed, so that the validity of a designed observer is verified in simulation; in addition, the precision of the estimated concentration is ensured; the expected design purpose is achieved; and an ammonia gas sensor or an NOx sensor at an inlet can be replaced completely.

The present invention relates to a drivage temporary supporting device which belongs to the drivage supporting machinery and solves the problems that a top plate is delaminated and collapsed easily if the unsupported roof distance of a new drivage is more than two meters due to the geological structural development of the top plate of a mine. The drivage temporary supporting device is characterized in that the supporting device is installed at the telescopic boom of a roadheader by a fastening ring. The upper ring edge and the lower ring edge of the fastening ring are provided with connecting boards for installing and fixing. The bottom of the lower ring of the fastening ring is provided with a support pedestal. The two ends of the support pedestal are symmetrically and vertically connected with lifting hydraulic jacks. The tops of a pair of lifting pillars of the hydraulic jacks are provided with saddles. The connecting boards which are used for fixing the hydraulic jacks are symmetrically arranged at the two sides of a wall which is vertical to the upper ring arc line of the fastening ring. Shafting brackets are symmetrically arranged at the arc line at the front part of the upper ring of the fastening ring vertical to the axial line of the telescopic boom. The shafting brackets are matched with an engaging lug at the back end of a bracket and are connected by a pin roll. A whiffletree is arranged at the front section of the face of the bracket which is connected with the fastening ring by the pin roll. A bracket slot is arranged at the inner side of the whiffletree. A hollow frame is dug at the middle section of the bracket, and the back of the bracket is provided with a support leg.

The invention relates to the field of overhead contact system image processing and provides an adaptive learning overhead contact system rigid conductor identification method and device for the defectexisting in the prior art. The method or the device can be widely applied to metro line overhead contact system rigid conductor identification in different environments and different lines. Geometrical parameter measurement is finished stably and efficiently. According to the method and the device, an overhead contact system rigid conductor positioning identification method is carried out on images which are collected by linear array cameras and comprise an overhead contact system, thereby obtaining overhead contact system rigid conductor curve information; the overhead contact system rigid conductor curve information is processed based on a gray projection statistical method, thereby obtaining a conductor gray projection curve; conductor gray projection curve information is input into aconductor space distribution model, and the optimum conductor model is obtained according to the Euclidean distance optimum solution; identification is carried out according to the optimum conductor model, thereby obtaining the optimum conductor contour location information; and calculation is carried out based on a binocular vision fundamental principle, thereby obtaining overhead contact systemrigid conductor geometrical parameters.

The invention discloses a hygrostat water tank comprising a water tank body, a dehumidifying float, a humidifying float, a sealing ring, an ultrasonic atomizer and a steam-guiding pipe. The water tank body is internally provided with water tank separating ribs which divide the water tank body into a left tank body and a right tank body, and a water tank communicating passage is arranged between the left tank body and the right tank body; the dehumidifying float is arranged at the upper part of the right tank body and upwards triggers a dehumidifying water level switch of a hygrostat when the right tank body is full of humidifying water; the humidifying float is arranged at the upper part of the left tank body; the sealing ring is arranged in the left tank body and is arranged at the upper water outlet of the water tank communicating passage; the ultrasonic atomizer is arranged in the left tank body and atomizes the water in the left tank body into steam when the hygrostat is started; and the steam-guiding pipe is connected with the ultrasonic atomizer to guide out the steam. On the basis, the invention also discloses the hygrostat sharing the hygrostat water tank. The invention is beneficial to realizing the requirements of the product for compact structure, simple appearance, reasonable cost and convenient operation.

The invention relates to a contra-rotating axial-flow fan with a lateral external-type one-driving-two motor. The contra-rotating axial-flow fan with the lateral external-type one-driving-two motor mainly solves the technical problems that the manufacturing cost of the existing axial-flow fan is high, the operation reliability and safety are lower, the working difficulty in maintenance is great and the like, and improves the operating environment and the stress situation of the motor are improved. The technical scheme is that a front impeller (2) and a rear impeller (7) are fixedly and respectively installed on two output shafts of a transmission case (6) on a base in an inner cylinder of a main machine cylinder (3), flow guide blades (5) and a flow guide blade adjusting mechanism (4) are arranged in an annular passage between the two impellers, a motor support (16) is arranged outside the lateral direction of the main machine cylinder (3) and a motor (15) which is installed on the motor support (16) is connected with the transmission case (6). The contra-rotating axial-flow fan with the lateral external-type one-driving-two motor is a ventilation device which can be widely used in industries such as mining, metallurgy, chemical industry and power plants and can be especially used for working places of explosion, high temperature, corrosion and the like.

The invention provides a halogen filament and the making method thereof, as compared with traditional anti-drooping filament, W-Re alloy wire has high recrystallization temperature and greater crystal grain length-width ratio and contains K, Al and Si doping agents, and the crystal grain length-width ratio is greater than 15; and the content of Re in the alloy is 0.4-0.8mass%. And the concrete making process comprises: preparing alloy powder with Re content of 0.4-0.8mass%, and preparing W-Re alloy sintered bar by isostatic pressing, presintering and vertical sintering; making the sintered bar into W-Re alloy wire by rotary swaging and drawing and coiling the W-Re alloy wire into filament. And the filament has stable crystal grain structure and can better apply to halogen W lamps.

The present invention relates to a microwave clothes drying machine. It is characterized by that said invention adopts the following technical measures: remaking half-wave voltage-multiplying rectifier circuit of high-voltage power supply of domestic microwave oven magnetron into full-wave rectifier circuit containing power regulation device, setting mutually perpendicular microwave activation directions to construct stereo microwave and adopting polygonal cabinet body or cylindrical or drum type reaction cavity, etc. to reduce microwave pulse peak power and raise microwave average power density, so that the microwave power can be flexibly regulated according to the number of clothes and the safety of drying process also can be raised.

The invention provides a multi-mode multi-port fusion antenna which includes a high-frequency (1) antenna array, a high-frequency (2) antenna array, and a low-frequency antenna array. The high-frequency (1) antenna array supports horizontal beam-forming. The high-frequency (2) antenna array does not support horizontal beam-forming. The low-frequency antenna array does not support horizontal beam-forming. A reflecting plate f1 and a reflecting plate f2 are arranged, and the reflecting plate f1 is higher than the reflecting plate f2. The high-frequency (1) antenna array is arranged on the reflecting plate f1. The high-frequency (2) antenna array is placed to the side of the high-frequency (1) antenna array. The oscillators of the low-frequency antenna array are all or partially embedded intothe high-frequency (1) antenna array, and the embedded part is not coplanar with the reflecting plate f2. The multi-mode multi-port fusion antenna provided by the invention has a very small windwardside on the premise that the performance is guaranteed. A miniaturized multi-port antenna is realized.

A process and a device for producing artificial boards by the aid of a spreading machine with multiple multilayer presses belong to artificial board production line processes and equipment. Board feeding trolleys receive boards from board receiving positions of wide belt conveyors, feed the boards to loaders, unload the boards and return to the board receiving positions, the needed time of moving back and forth once is t1, the hot-pressing cycle is T, the number of layers of the loader is d, and the time needed for filling up the loader is t=t1Xd, wherein the t<T. The device comprises symmetric rails, the board feeding trolleys, the n loaders, hot presses, n unloaders and an electrical module unit, wherein the rails are perpendicular to a frame, the n loaders are parallel to the rails, the n unloaders correspond to the hot presses, and the electrical module unit is used for controlling device. Yield is improved while investment and operating cost are saved, and the device is placed into use for many years.

The invention discloses an automatic motion massage chair, which is mainly composed of a massage chair body and a moving platform set on the inner side of the legs. There are two swinging devices in the sleeve grooves on the left and right armrests and on the outside of the left and right outriggers. A rotating shaft with two transmission gears fixed on the inside and two reverse cranks fixed on the outer end is connected to the left and right beams. The two fixed transmission gears are connected with the chain transmission mechanism set under the front and rear end plates of the mobile platform and the two mobile foot rubbing devices and a group of automatic foot movement massagers set above the front end plate of the mobile platform. Transmission, the outer ends of the two reverse cranks fixed at the outer ends of the rotating shaft are connected with rockers, and the two reverse cranks and rockers are hingedly connected with the two swing devices outside the left and right support legs, which mainly solves the problem of general massage chairs and massage chairs. The wheelchair cannot carry out the shortcomings of hand and foot movement and self-healing at the same time.

The invention relates to a method for parallel assembly of multi-segment DNA. Choose to insert the circular or linear unit vector into the circular host or linear host to form a gene carrier, and then recover the circular or linear vector to obtain the recombined DNA genetic material. Its characteristic is that it can realize parallel and simultaneous operation of multiple pieces of DNA, thereby improving the efficiency of DNA assembly to form a new DNA structure, and preventing DNA pollution and disproportionation, ensuring the quality of assembled DNA, so that it can achieve the design purpose. The time required to assemble multiple pieces of DNA is approximately proportional to log(N). The assembly operation is carried out outside or inside the cell, so that multiple DNA molecules can be spliced ​​in any order to form a new DNA structure. It is suitable for application in the field of genetic engineering to obtain new organisms through genetic recombination.

Disclosed is a sand-prevention filling device capable of preventing jamming. After the sand-prevention filling device is put downwards into a well, a delivery ball is delivered, and pressurizing is conducted, so that a rubber cylinder is expanded to seal a sleeve, and a slip is anchored on the sleeve; then a pipe column is rotated to enable a separating joint to be disengaged from a fishing joint,the pipe column is lifted up by a certain height, a locking device is motionless, and thus the total length after the locking device is connected with a connecting pipe is increased; when the sand-prevention filling device is put downwards again, it is ensured that an inner communicating hole continues to be aligned with a middle inner communicating hole, the pressure is increased, a shear pin issheared off, a valve seat falls, the inner communicating hole and an outer communicating hole communicate, and filling sand-prevention can be conducted by opening a filling channel; and after sand prevention and waiting on cement setting, the pipe column is lifted up to take out the interior of the sand-prevention filling device, then normal production can be conducted, therefore, after sand prevention and waiting on cement setting, the pipe column does not need to be rotated to enable the separating joint to be disengaged from the fishing joint, the problem that a part cannot be disengaged due to being jammed with special sand grains is avoided, the accident that the pipe column is jammed can be avoided, and significant economic benefits are achieved.

The invention relates to a tripping pipe column drilling fluid injection and circulation device and a method, and belongs to the technical field of drilling well tripping pipe column operation in petroleum and natural gas industry. A lug seat and a U-shaped screw bolt are fixedly arranged on a drilling machine hanging ring, a motor is arranged at an input end of a speed reducing box, a connecting joint is connected with an output end of the speed reducing box, a connecting seal is arranged on the connecting joint, the tripping pipe column drilling fluid injection and circulation device is connected and sealed with a pipe column through the connecting joint and the connecting seal, the connecting seal is arranged on the connecting joint through a sealing press block and screws, the upper end of a pipeline connecting mechanism is provided with a drilling fluid circulation pipeline connector, the lower end of the pipeline connecting mechanism is connected with the connecting joint, the connecting joint is a rotating element, a first air cylinder is connected with a slide seat through a pin shaft, the first air cylinder is driven to drive the slide seat to vertically move along the guide rail, and a connecting rod mechanism is connected with the slide seat through a fifth pin shaft and a sixth pin shaft. In-factory bench tests show that the method and the device meet the design requirements and have the characteristics that the installation is fast and convenient, the operation is convenient, and safety and reliability are realized.

The invention relates to a manipulator with a tiltable thumb web. A piston connecting beam is connected with a piston of an action source, and one end of a back finger connecting block is pivoted with the back side of the piston connecting beam, the other end of the back finger connecting block is hinged to the outer side of a back finger tail end, one end of a front finger connecting block is hinged to the front side of the piston connecting beam, the other end of the front finger connecting block is hinged to the outer side of the front finger tail end, the tail end of a support is fixedly arranged on the action source, the back side of the front end of the support is hinged to the inner side of the tail end of a back finger through a back finger pin, the front side of the front end of the support is hinged to the inner side of the tail end of a front finger through a front finger pin, the inner sides of the back finger and the front finger are in arc shapes, ,the action source penetrates through a round hole in a connecting plate of the manipulator, a shifting block is fixedly arranged on the action source, a torsion spring is sleeved on the action source, and the two protruding rods of the torsion spring are arranged at the two sides of the connecting plate and the shifting block. The thumb web formed by the back finger and the front finger can tilt with the rotation of the action source, so that the vibration or drill pipe slipping can be prevented, and the working states of operating robots on a drilling platform can be improved.

A technique for preparing dichloracetyl chloride is provided. The invention relates to a technique for preparing dichloracetyl chloride as insecticide, which adopts trichloroethylene as raw material and comprises 1) placing trichloroethylene the tower reactor to charge composite catalyst, wherein the weight ratio of the composite catalyst and trichloroethylene is 0.1-1.0: 100, the raw materials are stirred evenly and heated to 100-110 DEG C and the container is aerated by dry air under the temperature to keep 9-11 h; 2) distilling the obtained product of the step one and processing under normal pressure and collecting fraction at 105-108 DEG C, the colorless transparent liquid product dichloracetyl chloride is obtained. The invention uses dry air as oxidizing source, the reaction yield reaches 93.5% and the content is more than 99% through compressing air and oxidizing, thereby fitting for industrialized energy-saving production, reducing three-waste and improving economic benefit. The invention is simple in technique without special requirement of equipment in the processing procedure and low in equipment cost, which improves the security in the processing procedure greatly.

The communication equipment includes main communication unit with microprocessor, data memory, input device and inserting slot connected to internal reader; and screen set in the main communication unit. The name card with stored relevant information is inserted in the slot, the reader can read out the information fast from the card and display them in the screen. The read information is sorted, amended and annotated in the input device before being stored in the memory.

The present invention belongs to the technical field of structural design, and relates to a tool used for single-axis vibration vector decomposition. The tool is characterized by comprising an equipment installation bottom surface and a vibration product working surface. Through adoption of the tool of the present invention, a single-axis vibration vector can be decomposed, and vibration test requirements of a product in three axis directions, i.e., X axis, Y axis and Z axis, can be satisfied at the same time, so that a vibrated object has quantitative vibration response respectively in the three axis directions, thereby overcoming the defect that single-axis vibration equipment can only achieve single-direction vibration response of a product at the same time, greatly shortening a vibration test period, and improving working efficiency.

The invention discloses an auxiliary clamping device of a metallographic grinding and polishing machine. The device comprises a vertical retainer, the left side of the retainer is connected with a horizontal limiting cross beam and a horizontal bottom plate, a bolt is meshed with a screw hole in the limiting cross beam, the lower end of the bolt and the bottom plate clamp an edge steel plate of anoperation table of the grinding and polishing machine; a first through hole in an upper slideway limiting cross beam and a second through hole in a lower slideway limiting cross beam are located on the same vertical line, an external thread push rod penetrates through the first through hole and the second through hole, the second through hole is a square hole, and the cross section of the external thread push rod at the second through hole is also of a square shape; the lower end of the external thread push rod is connected with a sample chuck, the sample chuck is fixedly connected with a resin block inlaid with a metallographic sample, and the bottom surface of the resin block is in contact with a grinding wheel of the grinding and polishing machine; and the outer wall of an external thread sliding sleeve on the bottom surface of the upper slideway limiting cross beam is meshed with a force application nut through threads, and a hard spring is arranged between the force application nut and a stop nut on the external thread push rod.

The invention provides a method for designing a local tempering induction coil of an ultrahigh-strength steel threaded type workpiece based on finite element simulation. A geometrical model is established according to shapes of an ultrahigh-strength steel optical axis workpiece and an induction coil; finite element simulation for induction heating is carried out after grid partition and material attribute loading; a result obtained by simulation is compared with an experimental measurement result; and, if the two are matched well, design of the induction coil of the ultrahigh-strength steel threaded type workpiece in the next step is carried out. The shape factor, the position factor and the number of turns of the induction coil are optimal in design; the designed induction coil can realize that a threaded part of the ultrahigh-strength steel threaded type workpiece has homogenized tempering temperature in an induction heating local tempearing process; finite elements are introduced into the design of the local tempering induction coil of the ultrahigh-strength steel threaded type workpiece; therefore, visualization of temperature distribution in the local tempering induction heating process of the threaded part can be realized easily; a design process is optimized; furthermore, the design mistakes can be reduced; and the design cost is reduced.

The magnetic suspension motor for electric vehicle has rotor assembly, electromagnetic pole assembly and loop controlling unit. The rotor assembly has permanent magnet; the electromagnetic pole assembly consists of several magnetic pole coils to produce magnetic poles and the each magnetic pole coil has magnetically conducting coil seat comprising high magnetic inductivity ceramic and high magnetic inductivity silicon steel sheet; and the loop controlling unit has position sensor and loop controller. When the position sensor aligns at the geometric center of the position detecting hole, the magnetic pole coil aligns at the permanent magnet. The position sensor and the magnetic pole coil are connected to the loop controller. By means of the interaction between the electromagnetic coil and the powerful permanent magnet, the present invention can reduce the electricity consumption greatly.

A manually driven grain loading-unloading machine for loading grains on a cart or unloading grains from it is composed of a base, several universal castors, vertical rotary axle and its sleeve pipe, lever arm and its sleeve pipe, pull cable, hanging hook, and bearing.