123results about How to "Angle stable" patented technology

The invention discloses a graded positioning method for agricultural machinery navigation, comprising the following steps of acquiring a first positioning parameter, utilizing a Kalman filter to fuse the first positioning parameter, acquiring a second positioning parameter, acquiring a third positioning parameter, utilizing multi-sensor self-adaptive weighted fusion algorithm to fuse the second positioning parameter with the third positioning parameter, acquiring a target positioning parameter and positioning agricultural machinery according to the target positioning parameter. The invention also discloses a graded positioning system for agricultural machinery navigation. By fusing the positioning parameters acquired by measurement equipment for a plurality of times, the graded positioning method can smooth DGPS positioning data, effectively avoid the abnormal results of DGPS dynamic positioning, effectively filter test noise, reduce systematic error, form continuous, stable and accurate the information of the positions and course heading angles of agricultural machinery, and improve the positioning accuracy of agricultural machinery navigation.

The invention relates to a device for measuring a combined action of washout and high-temperature corrosion of an oil well tubular column. The device comprises a washout simulating box, a corrosion simulating box and a constant-flow pump, wherein the washout simulating box comprises a first box body, a support base fixed in the first box body, a rotating shaft supported on the support base, a roll sleeving the rotating shaft, a bearing platform connected to the top of the roll, a bracket groove connected to the top of the bearing platform, an angle dial connected onto the outer wall of the first box body, a clamping cutter connected onto the rotating shaft, and a discharging pipe connected to the bottom of the first box body; the corrosion simulating box comprises a second box body, a screen, a plurality of grooves formed in the side wall of an upper cavity, a carbon dioxide introducing pipe arranged outside the second box body, a funnel arranged at the top of the second box body and extending into the lower cavity, and a heating device coating the outer wall of the second box body, wherein one end of the carbon dioxide introducing pipe extends into an upper cavity; the lower end of the discharging pipe runs through the lower cavity and extends into the lower cavity; an inlet end of the constant-flow pump is connected with the lower cavity by means of a pipeline, an outlet end of the constant-flow pump is communicated with a sand blasting nozzle by means of a pipeline, and the sand blasting nozzle penetrates through the first box body of the washout simulating box.

An airborne system for producing electricity from wind energy includes a shaft, wind turbines rotatably mounted to the shaft and arranged to rotate independently in opposite directions when subjected to the same wind, and generators arranged to convert rotation of the turbines into electricity. A lifting section includes combination of kites and lighter than air balloons, generating a lifting force that caused the system being airborne at desire altitude. The center of gravity of the system is lower than the center of lift of the system; when the turbines of the system exposed to wind and start to rotate, torques are inducing on the shaft of the system; these torques are balancing each other and the remaining deferential torque being balanced by returning torque that is generated by the angular deviation of the center of gravity from it's lowest position, the magnitude of this returning torque, increasing as the angular deviation increased, until the system reach angular stability; electricity is generating and conducted through tether to an anchoring section for usage.

A method of measuring and transmitting a tire characteristic using a sensor device mounted to a tire of a wheel, the sensor device comprising a sensor element, an accelerometer, a wireless transmitter, and a microprocessor; the method comprising the steps of: a) obtaining acceleration data; b) digitally filtering the acceleration data; c) determining moments in time when the wheel is in an angular position range; d) obtaining other sensor data; e) transmitting the other sensor data at said moments in time, step b) comprising using exponential moving average filters connected in series, corresponding to a predefined set of formulas comprising parameters, and f) determining number of samples per 360° rotation, and setting the parameters to a value proportional to said number of samples. A sensor device adapted for performing said method.

The invention relates to accurate-spraying superfine dry powder extinguishing equipment for an intelligent pipe rack. The accurate-spraying superfine dry powder extinguishing equipment includes a regulating mechanism, a mounting plate, a shell body and two guide mechanisms, the guide mechanisms include rotating mechanisms, guide plates and boosting mechanisms, and the rotating mechanisms include side plates, first motors, first driving shafts, sliding blocks and support rods; and the boosting mechanisms include driving assemblies, driving plates, two telescopic assemblies and a plurality of boosting assemblies, and the boosting assemblies include spray nozzles, air pipes, air cylinders, first pistons and clamping assemblies. According to the accurate-spraying superfine dry powder extinguishing equipment for the intelligent pipe rack, the rotating mechanisms can drive the guide plates to rotate to enable superfine dry powder to be sprayed out along channels formed by two guide plates, thereby reducing the influence of dry powder due to the wind force during fire disasters, not only that, high speed air is sprayed from the boosting mechanisms to accelerate the superfine dry powder, thereby further reducing the influence of the superfine dry powder due to the fire-heating air pressure, the accurate spraying of fire extinguishing equipment can be ensured, and a flame extinguishingability of equipment is enhanced.

A paint pad with adjustable handle belong to painting tool field, includes a handle; a pad unite that includes a pad support body and a pad holder plate, the pad holder plate is connected to the bottom of the pad support body; wherein the pad support body has a handle groove on the top; a orientation part is under the groove, its up surface has a plurality of orientation teeth; the handle with plurality of adjusting teeth at the end of handle is located in the groove; a knob on the top of the pad support body can adjust the relationship between the orientation teeth and adjusting teeth. The conventional paint pad is fallible and instable for keeping stable angle between the handle and pad unite, it influences the painting route and uniformity, and reduces painting quality. The paint pad of the present invention allows the handle to have up & down vertically pivotal movement but not left & right swing; though the knob to adjust the engaging force between teeth, therefore, keep the right needed angle for stable operation. The new paint pad possesses advantages of easy in changing working situation, comfortable holding, big amount of absorbing paint, speedy painting, high quality in painting of corner wall areas and area with different colors and exchangeable of paint pad.

The invention discloses a car seat headrest, which comprises a front cover assembly, a rear cover assembly and a connection assembly, the connection assembly is used to connect the front cover assembly and the rear cover assembly; The connection assembly includes a turning body and a base, the turning body is installed in the front cover assembly, the base is installed in the rear cover assembly, the turning body and the top of the base Connected by a rotating shaft, the overturning body is provided with a plurality of locking teeth, and the base is equipped with pawls, and when the turning body rotates around the rotating shaft, the pawls cooperate with the plurality of locking teeth It is used to lock the turning body on multiple locking positions. Since the headrest can be locked at multiple card positions when the headrest is flipped back and forth, the angle and range of the flip adjustment are stable. In addition, because the headrest is divided into three parts, the front cover assembly, the rear cover assembly and the connection assembly, when the headrest is turned back and forth, no uncontrollable wrinkles will appear.

The invention provides a strengthening and toughening heat treatment method of an in-situ titanium boride particle reinforced aluminum matrix composite. The method comprises following steps that the aluminum matrix composite is subjected to homogenization treatment and then is subjected to high-temperature pretreatment, heat extrusion treatment, annealing treatment, short-time high-temperature solid-solution treatment, pre-deforming treatment and aging treatment in sequence; according to the heat treatment method, the process is simple and reasonable, through high-temperature homogenization and solid solution treatment, segregation can be effectively removed, and solid solution of the second phase can be promoted; through extrusion deforming and low-temperature annealing, a stable substructure and a small grain boundary can be generated in the microstructure, and strengthening and toughening of the composite are facilitated; finally, through short-time high-temperature solid-solution quenching, pre-stretching deforming and short-time manual aging, the precipitated phase can be more evenly dispersed in the matrix alloy; and through the process, the strength and plasticity of the in-situ TiB2 nano particle reinforced aluminum matrix composite can be effectively improved.

The invention discloses a crease-resist device for adhesive tape winding. The crease-resist device comprises a machine frame, a winding roller and a crease-resist mechanism, wherein the winding roller is installed at the rear end of the machine frame in a rotating mode. The crease-resist mechanism comprises two roller bases, the roller bases are connected to the front end of the machine frame and can slide from front to back, a banana-shaped roller is installed on the two roller bases, an elastic rubber layer is arranged on the surface of the banana-shaped roller, and power mechanisms for pushing the roller bases to move are connected to the roller bases. Through the crease-resist mechanism, creases generated in adhesive tape winding are eliminated, and the product quality is improved.

The invention discloses a device and a method for prefabricating cracks in a coal rock sample at any angle. The device comprises a position control module, an angle adjusting module, a mechanical-hydraulic combined cutting module and a laser ranging module. The position control module is in threaded connection with the upper end of the angle adjusting module; the mechanical-hydraulic combined cutting module is fixedly connected with the angle adjusting module through a threaded connecting shaft seat; a stabilizer is mounted on the outer side of the position control module; the stabilizer is foldable, so the device can be stabilized in drilling holes with different diameters; the angle adjusting module realizes 90-degree prefabricated crack angle adjustment through a steering bottom support; high-pressure water spraying cutter teeth and a laser distance measuring sensor are arranged in the mechanical-hydraulic combined cutting module; the mechanical-hydraulic combined cutting module canrotate synchronously, the length of a crack is monitored in real time, the high-pressure water spraying cutter teeth are pushed by hydraulic power to extend, and jet flow nozzles are arranged at thetop ends of the cutter teeth and can achieve the combined effect of mechanical cutting and hydraulic cutting. Steps are simple, and the operation is convenient.

The invention relates to the field of display brackets, in particular to a double-screen clamping type display bracket. The double-screen clamping type display bracket comprises a clamping-type vertical seat, a guiding column, an air spring and a top plate; the guiding column is in shaft connection with the top of the clamping-type vertical seat; a lifting sliding block sleeves the guiding column,and the front end of the sliding block is in shaft connection with a primary rotating block; a shifting block is arranged on the oblique upper part of the primary rotating block and connected with the primary rotating block through the air spring, and the top of the shifting block is in shaft connection with a secondary rotating block; the middle section of the top plate is connected with the secondary rotating block, and the two ends of the top plate are in shaft connection with two movable sliding rails correspondingly; the front side of each movable sliding rail can be movably provided with a corresponding bearing face plate, and the back sides of the two bearing face plates are each provided with a stopping piece; and the back side of the guiding column is provided with a labor-savingmechanism in transmission connection with the lifting sliding block, and a bearing block in threaded fit with the guiding column sleeves the guiding column. The double-screen clamping type display bracket has the functions that the angles of a large display and a small display can be adapted, and the transverse separation distance is adjusted, meanwhile, also has the lifting function, and meet the needs of users of the double-screen displays.

The invention relates to an interconnected radiating device and a light-emitting diode (LED) lamp using the same. The interconnected radiating device comprises a plurality of radiating units. Each radiating unit comprises an installation frame and an installation plate, the installation frame is a hollow cuboid frame, an installation seat is arranged on the lower surface of the installation frame and used for installing an LED lighting unit, the installation plate is arranged on the upper surface of the installation frame opposite to the lower surface, an installation position is arranged on the installation plate and used for installing the installation plate on a lamp holder, at least one of two pairs of sides between the upper surface and the lower surface is provided with an interconnected assembly, the interconnected assembly comprises an insertion connection portion group and an insertion connection position group, the insertion connection position group is used for inserting the insertion connection portion group of another radiating unit, and the insertion connection portion group is inserted into the insertion connection position group of another radiating unit. The length of the insertion connection portion group inserted into the insertion connection position group is larger than 1cm. The insertion connection position group is provided with a plurality of insertion connection positions correspondingly, and the plurality of insertion connection positions are inserted into the insertion connection portions in a one-to-one correspondence mode. The interconnected radiating device fully utilizes space and is better in radiating effect.

The invention discloses a polishing device for general gasoline engine frames. The polishing device is aimed at solving the problems of unstable degrees of polishing and erratic infrequency caused by manual operation in the prior art. The polishing device comprises a frame, a belt pulley, a driven belt pulley and further comprises a driven shaft which is rotatingly connected with the frame, a transmission shaft which is rotatingly connected with the frame and an output shaft which is provided with gear racks. The driven belt pulley is fixed at one end of the driven shaft, a worm is arranged in the middle part of the driven shaft and a worm gear which is matched with the worm is arranged in the middle part of a rotating shaft and gears which engages with the gear racks are arranged at one end of the rotating shaft. A first limit switch and a second limit switch are arranged at the end of the frame near to the output shaft. A working platform is connected with one end of the output shaft and a sharpening stone is connected above the working platform. The worm comprises a left part and a right part and an inverted-cone lug and an inverted-cone clamping slot are respectively mounted on the end surface of the left part and the right part. The polishing device for general gasoline engine frames has the advantages of being simple in structure and good in practicability.

A semi-automatic height-adjustable and angle-adjustable desk is characterized in that a desktop plate contacts with top ends of draw bars. Upper ends of the two front draw bars are respectively provided with a horizontal strip-shaped top, and the two tops run front and back and are parallel mutually. A front portion of the desktop plate is placed on the two front draw bars and is not connected with the front draw bars. Upper ends of the two rear draw bars are respectively fixed at two ends of a transverse bar, and the transverse bar is hinged with the desktop plate. An adjustment mode includes that the front draw bars and the rear draw bars are adjusted respectively, and if the adjusted directions and the adjusted distances of the front draw bars and the rear draw bars are identical, the height of the desk can be adjusted; and if the adjusted directions and the adjusted distances are not identical, the angle of the desk can be adjusted. Each draw bar is provided with a positioning device. A main body is a supporting plate. One end of the supporting plate is high while the other end of the supporting plate is low, and the high end of the supporting plate is supported on the draw bars while the low end of the supporting plate is supported on a desk frame. A pressure spring is disposed above the high end of the supporting plate and tightly presses the supporting plate. When the height of the desk needs to be increased, the desk can be directly adjusted to certain height in place, and then is positioned automatically; and when the height of the desk needs to be reduced, a user can jack up the supporting plate by fingers to lead the supporting plate to be separated from the draw bars at first, the draw bars and the desktop plate descend automatically by the aid of self gravity, after the draw bars and the desktop plate reach proper positions, the user can release the hands, and then the desk is positioned. Each draw bar is provided with a damper, and descending speed of each draw bar is controllable. The desk can be positioned firmly and can bear load of 150 kilograms maximally; adjustment is convenient and fast and only takes few seconds; and the distance between a desktop and the user is increased along increase of the angle, and the desk can be used for people to have art classes such as oil painting classes, gouache classes and the like in a common classroom.

The invention relates to a high-straight-edge splint-type bending correction mould which comprises an upper template and a lower template; a male mould, a tapered wedge and a limit block are fixed on the upper template; a pin shaft and a female mould are arranged on the lower template; an open and close splint is arranged on the pin shaft; and one side of the female mould is provided with a fixedsplint which is fixed on the lower template. According to the bending correction mould disclosed by the invention, the working efficiency and precision can be improved; the investment cost of equipment is reduced; the utilization rate of the equipment is improved; and the mould is tightly locked with the splint through the tapered wedge so that the plastic deformation of materials can be restrained, and a workpiece is fetched and placed conveniently; a bottom touching correction method is adopted so that the workpiece has stable angle and flat bottom.

A manufacturing method of a semiconductor device having a trench is provided to form, at a corner portion of the trench, an oxide film which is greater in thickness and smaller in stress than at other portions. When the trench formed in the semiconductor substrate is oxidized, it is oxidized in an oxygen environment containing dichloroethylene at a predetermined weight percent to allow the formation of an oxide film having a greater thickness at the corner portion of the trench than thickness at other portions, whereby the semiconductor device improving dielectric breakdown characteristics can be obtained.

The invention discloses reconstruction plate bending pliers which comprise a left pliers leg and a right pliers leg, the reconstruction plate bending pliers further comprise a left roller, a right roller, a left roller shaft, a right roller shaft, a locating sleeve and a locating plate, wherein a locating shaft and a locating block are arranged on the locating plate, a left roller hole and a center locating hole are formed in the left pliers leg, a right roller hole and a center locating hole are formed in the right pliers leg, the left roller shaft and the right roller shaft are sleeved with the left roller and the right roller and connected with the left roller hole and the right roller hole, the locating block is located in the middle position of the left roller hole and the right roller hole, the locating shaft penetrates through the center locating holes of the left pliers leg and the right pliers leg and is connected with the locating sleeve, the locating sleeve comprises a top corner and a base part, and the top corner is at a fixed angle and located under the locating block. According to the reconstruction plate bending pliers, a reconstruction plate is completed in a rolling manner by the aid of the rollers at the top ends of the pliers lags, so that the angle of a formed titanium plate is smoother, mechanical damage to the titanium plate in the bending process is reduced, and the top corner of the locating sleeve is at the fixed angle so that the titanium plate can obtain the required angle by one time.

A carbon dioxide laser zoom aiming system comprises an aiming lens box provided with a first transverse groove, a zoom aiming lens is mounted in the first transverse groove, the zoom aiming lens is connected to a rotary post through a connection plate, the rotary post is hinged to the upper portion of the aiming lens box, an elastic protective pad is arranged at the inner bottom of the first transverse groove, a cover plate that may slide horizontally is mounted outside the first transverse groove and mates with the first transverse groove, the aiming lens box is provided with a second transverse groove and a vertical groove which are communicated in intersected manner, and the second transverse groove and the vertical groove are positioned in the front of the aiming lens box. The carbon dioxide laser zoom aiming system has the advantages that a lens unit can be fully protected in idle state, the hinging angle of the lens unit can be adjusted during use, a fixing press ring and a spring can be added to allow the angle of the lens unit to be adjusted more stably, a fastening connector at the rear may ensure that the lens unit is fastened after adjusting, and unnecessary shaking of the lens unit can be prevented.

The invention belongs to a constant-center-height grinding method of a tapered roller centerless grinding machine. A guide wheel drives a roller to be machined which is arranged among a grinding wheel, the guide wheel and a guide plate to rotate, and the roller to be machined is ground by the grinding wheel; during grinding, the center of the roller to be machined and the center of the grinding wheel are located on the same horizontal line. The constant-center-height grinding method of the tapered roller centerless grinding machine solves the problems that the machining errors are great, the operation is complex, the working efficiency is low and the like in the prior art, and has the advantages that the variation of an included angle between a connecting line of the center of the roller and the center of the grinding wheel and a connecting line of the center of the guide wheel and the center of the grinding wheel is less than 1 / 3 of that in the past grinding method, the operation is simple, the working efficiency is high and the like.

The invention relates to the field of axial flow fans for mines, in particular to a moving blade regulating device for an axial flow fan. The moving blade regulating device for the axial flow fan is characterized by comprising a worm gear, a worm, a screw, a nut shaft, a connecting disc and racks, wherein one end of the nut shaft is coaxially connected with the connecting disc and the other end of the nut shaft has a threaded hole which is connected with one end of the screw; the other end of the screw is coaxially connected with the worm gear; the worm gear is engaged with the worm; the racks are uniformly arranged on the edge of the connecting disc; a central circle where the racks are positioned is coaxial with the connecting disc; a gear is engaged with the racks; and a blade shaft provided with blades is connected with the gear. The effective engaged thread length of the screw and the threaded hole is not less than one half of the circumference of a reference circle of the gear. Compared with the prior art, the device has the advantages that: installation angles of all the blades can be synchronously turned 180 degrees at one time after the fan is shut down, so that the negative air volume of the fan reaches 100 percent of the positive air volume; the device can be simply, conveniently and reliably operated; and the angles can keep stable after the blades are adjusted due to the self-locking characteristics of the worm and the screw, so that the mine safety is reliably guaranteed.

The invention relates to a structurally stable intelligent LED tunnel light with direction adjustment function, which includes a mounting plate, a direction adjustment mechanism, a lampshade and a lamp housing. The water storage mechanism, the direction adjustment mechanism includes a suspension rod, a direction adjustment assembly and at least two abutment assemblies, the abutment assembly includes a first motor, a first drive shaft, a sleeve and an extrusion block, and the weak light mechanism includes a water cylinder and a piston Board, the intelligent LED tunnel light with a stable structure and the function of direction adjustment can fix the angle of the lampshade after changing the angle of the lampshade through the adjustment mechanism, so as to prevent the airflow generated by the vehicle passing inside the tunnel from vibrating the tunnel light and avoid the deviation of the irradiation angle. In this way, the water volume in the water tank of the weak light mechanism is changed through the water storage mechanism, so as to adjust the illumination brightness of the LED tunnel light according to the brightness of the outside light of the tunnel, reduce the brightness difference, and reduce the influence of "black hole effect" and "white hole effect". Thereby, the practicability of the device is improved.

The invention discloses a punching device. The punching device comprises a worktable, an automatic rotating clamp arranged on the worktable, vertical guide mechanisms symmetrically arranged on the left side and the right side of the automatic rotating clamp and a punching mechanism connected with the two vertical guide mechanisms. The punching mechanism comprises a punching drive assembly, a punching pressurizing platform arranged on the upper side of the automatic rotating clamp, a waste collecting mechanism and a punching mold arranged at the bottom of the waste collecting mechanism, the output end of the punching drive assembly is connected with the waste collecting mechanism through a guide plate, and the guide plate is in sliding connection with the two vertical guide mechanisms. According to the punching device, after the automatic rotating clamp clamps the bottom of a basket, the punching drive assembly drives the guide plate to drive the punching mold to move in the guide direction of the vertical guide mechanisms to achieve stamping and punching of a silica gel drain basket on the punching pressurizing platform, stamping punching efficiency is high, the effect is good, andthe production automation level is improved.

The invention relates to the technical field of aluminum-plastic plate cutting equipment, in particular to an angle-adjustable aluminum-plastic plate cutting device. The device comprises a mounting plate, a driving structure, a supporting structure, an adjusting structure, a cutting structure and a limiting structure; aluminum-plastic plates with different widths are placed through the driving structure, the aluminum-plastic plate cutting device is suitable for cutting different aluminum-plastic plates, the cutting efficiency is improved, the aluminum-plastic plates are driven by the driving structure to slide on the mounting plate, and the cutting efficiency is improved; the mounting plate is supported or moved through the supporting structure, so that aluminum plates in different placesare conveniently cut, the aluminum plates are prevented from being carried, and manpower is saved; a position of the cutting structure after rotation is adjusted through the adjusting structure, so that the cutting structure makes better contact with the aluminum-plastic plates, and the cutting effect is better; a cutting angle is adjusted through the cutting structure, the aluminum-plastic plateswith different angles can be cut conveniently, the cutting effect is good, and cutting is stable; and the cutting structure is limited through the limiting structure, so that the change of the cutting angle due to shaking of the cutting structure is avoided, and the cutting angle is more stable.

The invention relates to handheld laser welding equipment. The handheld laser welding equipment comprises a welding gun, wherein a welding head is fixed to the rear end of the welding gun, the welding gun is fixedly sleeved with a handle, and a control switch is fixed to the bottom of the handle in a penetrating mode; a fixing block and a guide plate are fixed to one side of the welding gun through bolts, and a connecting frame is hinged to the other side of the fixing block; a directional plate is fixed to the other side of the connecting frame through bolts, and the section of the directional plate is J-shaped; a guide groove is formed in the front end of the guide plate, and the section of the guide groove is arc-shaped; a guide block is slidably connected into the guide groove, and a guide spring is fixed between the guide block and the inner wall of the guide groove through bolts; and the same connecting rod is fixed between the guide block and the connecting frame through bolts. The bottom of the directional plate makes contact with a working table or a table top, so that the hand can be stably supported through contact stress between the welding head and a welding seam part and contact stress between the directional plate and the working table, and therefore the situation that the hand shakes, and consequently angle deviation is caused is effectively avoided.

The invention discloses a hot tinning fast water-cooling device which comprises a water tank arranged inclinedly. A wire inlet and a wire outlet are formed in two ends of the inclination direction ofthe water tank; at least two dividing plates are arranged in the water tank; wire passing holes are formed in the dividing plates; a cooling cavity is cooperatively formed between each two adjacent dividing plates; cooling liquid is arranged in the cooling cavity; the cooling cavity is connected with a water circulation pipeline; a cut-off drainage cavity is arranged between the wire inlet and theadjacent dividing plate; a cut-off drainage pipe is arranged in the cut-off drainage cavity; an air drying cavity is arranged between the wire outlet and the adjacent dividing plate; an air blower isarranged in the air drying cavity; and an air drying drainage pipe is further arranged in the air drying cavity. According to the hot tinning fast water-cooling device provided by the invention, cooling can be accomplished with the tiny bending degree, so that the limitation of the production specification is solved, and the working environment of a workshop cannot be influenced.

The invention discloses an adjustable absorption and transmission integrated conformal frequency selective surface, which comprises a dielectric substrate, wherein a plurality of frequency selective surface units are periodically arranged on the surface of the dielectric substrate, and each frequency selective surface unit comprises a selective wave absorbing layer and a selective wave transmission layer which are arranged on the surfaces of the two sides of the dielectric substrate respectively, and adjustable PIN diodes are arranged in the selective wave absorbing layer and the selective wave transmission layer; a direct current bias circuit is arranged on the dielectric substrate and is used for regulating and controlling the adjustable PIN diodes; and the frequency selective surface unit and the dielectric substrate are conformal. The frequency selective surface has the advantages of adjustability, conformality, stable angle and polarization, compact design, broadband absorption, broadband wave transmission and the like. The on / off state of the PIN diode can be adjusted through the designed biasing circuit, so that the structure can be switched between the performance of medium-frequency wave transmission and low-frequency / high-frequency wave absorption and the performance of all absorption of interested frequency bands; the frequency selective surface has good angle stability and polarization stability, and can be conformal on various conformal structures such as a cylindrical surface and the like.

A paint pad with adjustable handle belong to painting tool field, includes a handle; a pad unite that includes a pad support body and a pad holder plate, the pad holder plate is connected to the bottom of the pad support body; wherein the pad support body has a handle groove on the top; a orientation part is under the groove, its up surface has a plurality of orientation teeth; the handle with plurality of adjusting teeth at the end of handle is located in the groove; a knob on the top of the pad support body can adjust the relationship between the orientation teeth and adjusting teeth. The conventional paint pad is fallible and instable for keeping stable angle between the handle and pad unite, it influences the painting route and uniformity, and reduces painting quality. The paint pad of the present invention allows the handle to have up & down vertically pivotal movement but not left & right swing; though the knob to adjust the engaging force between teeth, therefore, keep the right needed angle for stable operation. The new paint pad possesses advantages of easy in changing working situation, comfortable holding, big amount of absorbing paint, speedy painting, high quality in painting of corner wall areas and area with different colors and exchangeable of paint pad.

The invention relates to the technical field of aquatic product transportation and production, in particular to an unloading mechanism based on an aquatic product carrier vehicle. The unloading mechanism based on the aquatic product carrier vehicle comprises an unloading groove and two sets of lifting mechanisms. The unloading groove is a groove body with the two ends being open, one end of the unloading groove is a feeding port, the other end of the unloading groove is a discharging port, and the horizontal height of the discharging port of the unloading groove is lower than the horizontal height of the feeding port of the unloading groove; and the two sets of lifting mechanisms are installed at the lower ends of the two ends of the unloading groove correspondingly, and used for adjustingthe overall inclination angle and the height of the unloading groove, and the unloading groove comprises two symmetrically arranged side plates and a water drainage grating plate arranged between thelower ends of the two side plates. The unloading mechanism has the advantages that the structure is simple, operation and using are convenient, the inclination angle and the height can be flexibly adjusted, unloading is convenient, the labor intensity of workers is relived, water can be effectively drained in the unloading process, and too much water is prevented from accumulating in the subsequent processing process.

Provided is a flywheel demonstration system. The flywheel demonstration system comprises a bearing and a horizontally arranged rotary disc (2). The axis of the bearing is arranged in the vertical direction and the rotary disc is used for simulating a spacecraft and capable of rotating in a horizontal panel. A driving motor (3) is fixed on the rotary disc and connected with quality blocks (4) used for simulating flywheels of the spacecraft, and with a speed sensor used for detecting rotation speed of rotation shaft. An outer ring or an inner ring of the bearing (1) is connected with an angular displacement sensor used for detecting actual rotation angles of the rotary disc. The demonstration system fully simulates a space environment of a spacecraft. In a demonstration method, by identifying frictional resistance torque between the inner ring and the outer ring of the bearing and inputting the identified frictional resistance torque into a control system module, an accurate module is provided for the design of a control system; the control system is more stable; and the angle of the rotary disc is more stable.