616results about How to "Low installation accuracy requirements" patented technology

The invention discloses an electric field type time-grating angular displacement sensor. The electric field type time-grating angular displacement sensor comprises a rotor and a stator, wherein the surface of a base body of the rotor is covered with a circle of dual-sinusoid electrodes which are arranged at equal intervals, the surface of the base body of the stator is evenly covered with a circle of fan-ring-shaped or curved-surface rectangular electrodes, a stator lead are arranged on the bottoms of the electrodes, an insulating layer is arranged between the electrodes and the lead, the surfaces of the electrodes are covered with an insulating protective layer, and thus a multi-layer structure is formed; the base body of the rotor and the base body of the stator are installed coaxially, and a certain gap delta is reserved between the base body of the rotor and the base body of the stator; the base body of the rotor rotates relatively around the axis; the four electrodes in a cycle of the stator are connected with a sinusoidal excitation voltage with a phase of 0 degree, a sinusoidal excitation voltage with a phase of 90 degrees, a sinusoidal excitation voltage with a phase of 180 degrees and a sinusoidal excitation voltage with a phase of 270 degree respectively, the amplitudes and the frequencies of the sinusoidal excitation voltages are equal, and the phases of traveling wave signals Uo generated by the electrodes of the rotor are compared with the phases of a path of fixed-phase reference signals Ur with the same frequency; the phase difference between the two paths of signals is represented by interpolated clock pulses, and an angular displacement value is obtained through conversion. The electric field type time-grating angular displacement sensor is simple in structure and low in power consumption, requirements for mechanical installation precision are low, and free high-precision angle displacement measurement within the range of 360 degrees can be achieved.

The invention relates to a three-dimensional scanning system, which is used for obtaining three-dimensional stripe point cloud data of a detected object. The system comprises: a light source, which successively and alternately projects multiple speckle patterns and stripe patterns on the detected object; a left camera and a right camera, which synchronously collect left and right speckle images and left and right stripe images of the detected object; a speckle data and sign point data reconstruction module, which obtains speckle three-dimensional data and sign point three-dimensional data on the basis of the speckle images; a stripe matching module, which conducts back projection onto the left and right stripe images according to the speckle three-dimensional data and the sign point three-dimensional data, and guides matching for stripes of the left and right stripe images; and a three-dimensional reconstruction module, which reconstructs the corresponding matched stripes of the left and right stripe images into three-dimensional stripe point cloud data. The invention also provides a scanning method of the three-dimensional scanning system.

A two-freedom air-shooting rotary table using model airplane helicopter as carrier is prepared for using silica gel vibration attenuation material to isolate connection position between suspension support and model airplane helicopter landing gear, applying V belt driving on horizontal rotary mechanism and rope driving on vertical-rotary mechanism, utilizing round rudder disc with edge notch to drive varifocus control rod of DV machine for carrying out varifocus, utilizing model airplane remote control unit to control DV machine to rotate vertically and horizontally as well as to carry out varifocus by shooting personnel.

A regulatable supporter is composed of top plate, top seat, ball hinge, screw piles, locking nuts, base of screw pile, locking screw and base, and can be regulated vertically and horizontally in stepless mode. Its advantages are less compression and high precision.

The invention discloses an in-place measuring method for runout of a high precision gyrorotor. The in-place measuring method comprises the following steps of: stopping rotation of a shaft to be measured, installing a laser displacement sensor, electrical vortex sensors and Hall sensors, and installing a sign that can be identified by the Hall sensors on the shaft to be measured; adjusting positions of the sensors by taking the first electrical vortex sensor sleeved with the Hall sensor as a standard; enabling the surface of the shaft to be measured to be adsorbed with four pieces of magnetic steel which serve as signs can be identified by the Hall sensors; rotating the shaft to be measured, after the rotating speed is stable, collecting periodical pulse signals output by the Hall sensors; adjusting the shaft to be measured to have the proper rotating speed; obtaining signals measured by each electrical vortex sensor; working out an comprehensive runout error, and working out a runout value of a workpiece to be measured on a measuring section. The in-place measuring method for the runout of the high precision gyrorotor has the advantages of being capable of separating rotating error of a machine tool spindle, and providing runout of the high precision gyrorotor with high precision runout information.

The invention discloses a position detecting system for the edge of a winding-up H-shaped wheel of a wire drawing machine and a control method thereof. The method comprises the following steps that: (1) two extreme positions are calibrated; in the process that a controller adopts a motor to drive a bracket to move on a lead screw, the controller acquires distances from displacement sensors to theinner edge of the H-shaped wheel by the two displacement sensors and calibrates the two extreme positions according to the distances; angle values of encoders corresponding to the two extreme positions are acquired; and (2) the bracket is controlled to do reciprocating movement between the two extreme positions, and the controller drives the bracket to move along the lead screw by the motor, and controls the motor to rotate reversely when the bracket reaches the extreme positions, so that the purpose that the bracket moves between the two extreme positions in a reciprocating manner till the wire arranging procedure on the H-shaped wheel is finished. The position detecting system has the characteristics of high detection accuracy and easiness in implementation and the like and can effectively avoid the phenomenon of wire stacking at the edge of the H-shaped wheel.

The invention provides a non-fire-worker-driven two-stage compressing releasing mechanism. Pretightening force applied to the mechanism can be accurately measured by means of strain gages; in the compressing state, a separating cap is limited by upper balls; a releasing pin is clamped by lower balls; the positions of the upper balls are determined by the separating cap, an upper retainer and the releasing pin; the positions of the lower balls are determined by the releasing pin, a sliding block and a lower retainer; and the sliding block is compressed by an anti-impact spring. During releasing, a non-fire-worker-driven element is powered on to start working to drive the sliding block to upwards move, after the sliding block upwards moves by a certain distance, the lower balls enter a groove of the sliding block, the releasing pin is unclamped and moves downwards under the effect of a driving spring, then the upper balls are unrestrained and fall into a groove of the releasing pin, theseparating cap is separated, and thus releasing is completed. In this mechanism, a plurality of spherical pairs are adopted, the influence of moment transferring on the part cooperation relationship and the releasing reliability is avoided, and meanwhile the mounting accuracy requirement is reduced; and control is convenient, vibration resistance is high, the borne load is large, and reliability is high.

The invention relates to a ball-hinged coupling mechanism of a locator based on a three-dimensional force sensor, wherein a three-dimensional force sensor is arranged on a locator; a ball-hinged coupling unit is connected with the three-dimensional force sensor; a process ball head is hinged in the ball-hinged coupling unit; two laser tracker targets are symmetrically arranged on an upper surface of the ball-hinged coupling unit along a diameter direction; and a data wire of the three-dimensional force sensor is led out by a wiring hole of the three-dimensional force sensor on the side. The coupling mechanism integrates the ball-hinged coupling and the three-dimensional force sensor with the locator, achieves quick and accurate coupling of the plane and the locator and coordination control of the locator, not only improves production efficiency, but also reduces assembly stress greatly.

The invention discloses electronic display equipment and electronic equipment. The electronic display equipment comprises a shell, a screen and a vibration device; at least a part of the screen is connected with at least a part of the shell through a flexible connection device; the flexible connection device has elastic, the vibration device is fixed on the screen, the vibration device is configured to produce vibration in response to an electric signal of the external circuit, and drive the screen to make sound by vibration. In the electronic display equipment disclosed by the embodiment of the invention, the screen and the shell are connected through the flexible connection device but not in fixed connection; the screen cannot drive the shell to vibrate together in the vibration, therebyeffectively reducing the sound leaking caused by the vibration of the shell.

The invention discloses a bearing device for a solar cell assembly. The bearing device comprises a plurality of supports, a plurality of rotating brackets and a driving mechanism, wherein the plurality of supports are arranged at intervals; the plurality of rotating brackets for supporting a solar cell panel are rotationally supported on the plurality of supports respectively and comprise drivingrotating brackets and driven rotating brackets, and the two adjacent rotating brackets are connected through a flexible linkage mechanism so that the plurality of rotating brackets rotate synchronously; and the driving mechanism is connected with the driving rotating brackets to drive the driving rotating brackets to rotate. According to the embodiment, the flexible linkage mechanisms are linked with the plurality of rotating brackets to rotate synchronously, so that the bearing device for the solar cell assembly has low transmission power, light weight, low cost and low installation precision requirement. The invention also discloses the solar cell assembly adopting the bearing device.

The invention discloses an absolute linear time grating displacement sensor based on an alternating electric field. The absolute linear time grating displacement sensor comprises a probe body and a rule body. A coarse measuring electrode I, a fine measuring electrode and a coarse measuring electrode II are successively disposed on the lower surface of the probe body from left to right. Excitation electrodes A, B, C and D are arranged on the upper surface of the rule body. Envelope lines formed by the vertex connection lines of the excitation electrodes A, B, C and D are sine curves which successively have 90 degree phase differences and periods not more than 2[pi]. A coupling electric field formed between the left and right parts of the rectangle electrode of the rule body and the square coarse measuring electrodes of the probe body senses an electric traveling wave signal to carry out opposite pole positioning and realize a coarse measurement function. A coupling electric field formed between the middle part of the rectangle electrode of the rule body and the dual sine fine measuring electrode of the probe body senses an electric traveling wave signal to carry out precision measurement and achieve a precise measurement function. A symmetrical differential structure is used to improve the stability of measurement, suppress common mode interference, and increase signal amplitude. The absolute linear time grating displacement sensor has the advantages of low power consumption, high precision, simple structure, low requirement for mechanical installation precision, and high-precision absolute displacement measurement in a large range.

The invention discloses a double-shaft tracking support. The double-shaft tracking support comprises a bracket, a stand column, a center pivotal shaft, a turn angle adjusting device and an elevation angle adjusting device which are all used for bearing a solar component. The bracket is connected with the stand column through the center pivotal shaft, a turn angle pivotal shaft of the center pivotal shaft is hinged to the bracket so that the bracket can rotate in the turn angle direction, and an elevation angle pivotal shaft of the center pivotal shaft is hinged to the stand column so that the bracket can rotate in the elevation angle direction. The turn angle adjusting device comprises a first transmission part and a first driving part, wherein the first transmission part is connected to the bracket, and the first driving part is mounted on the turn angle pivotal shaft and is matched with the first transmission part. The elevation angle adjusting device comprises a second transmission part and a second driving part, wherein the second transmission part is connected to the elevation angle pivotal shaft or the bracket, and the second driving part is mounted on the stand column and is matched with the second transmission part. The double-shaft tracking support has the advantages of being firm in structure, low in cost, low in power consumption, stable in operation, convenient to install, transport and maintain daily and the like.

The invention relates to a backlight module with wide amplitude and even light, which can be used as light source by installing in lamp house by assembling one or a plurality of modules. The invention comprises a straight tube type light source, an even light reflection board with multi turning surfaces and an even light bowl. The reflection board with multi turning surfaces and even light respectively comprises a reflection area, a lens diffuse mixing reflection area and a diffuse reflection area from central line to two sides, and each reflection area is formed by one or more than one reflection surfaces, and positioned under the straight tube type light source. The even light bowl is positioned above the straight tube type light source, and provided with a rhomboidal beam orifice, and the edge is in randomly scattered tooth shape, and the face facing the light source is the lens reflecting surface, and the face facing the display surface is the diffuse reflection surface. The design of three areas solves the difficulty of reflected light distribution and control. Reflection ray can be reflected in a cross way in the distance by the even light bowl, and the light ray can be gentler. The effective use rate of the module reaches about 90 percent, wide amplitude reaches 500 to 600 mm, and lighting evenness reaches more than 90 percent. Moreover, the advertising light box thickness is controlled between 70 mm to 50 mm.

The patent relates to a novel seal printer. A jet nozzle is driven to rotate and carry out print through a motor in a printer shell. The number of parts in the printer is reduced, the size of the printer is the same with that of a traditional seal, and the replacing of the traditional seal is realized. At the same time, a coaxial connecting device is arranged in the printer, the structure is simple, and a certain coaxiality difference tolerance is available. The printer is simple to mount and durable.

The invention discloses a method for diagnosing a consistency fault under the configuration of five gyroscopes. In the five gyroscopes, three gyroscopes Wx, Wy and Wz are arranged in an orthogonal mode and two gyroscopes Ws and Wt are arranged slantwise; and the five gyroscopes are arranged in a body structure. The method comprises the following steps of: constructing five angular velocity consistency fault distinguishing formulas; acquiring angular velocity increments (alpha is x, y, z, s or t) output by the five gyroscopes, and accumulating in a rolling accumulation cycle delta t3 in a rolling mode to acquire an angular velocity increment accumulated value; substituting the angular velocity increment accumulated value into the five formulas to judge whether the five formulas are right; and acquiring a fault diagnosis result according to the judgment. By the method, cost is reduced, the navigation accuracy and reliability are guaranteed, and faultless angular velocity increment can be provided for navigation computation.

The invention discloses a comb tooth lifting type automatic carrier. A lifting rack is provided with comb teeth for bearing automobile wheels; an automobile body is connected with the lifting rack through a lifting device; the lifting device comprises two lifting jacks and a lifting driving motor; the lifting jacks are respectively mounted at two ends of the automobile body; each lifting jack comprises a seat, a lifting guiding shaft, a gear and a rack; each seat is connected with the automobile body; each lifting guiding shaft can slide along a guiding hole in the corresponding seat; the top of each lifting guiding shaft is connected with the lifting rack; each gear is connected with a shaft end of the lifting driving motor and is rotatably connected to the inside of the corresponding seat; each rack is connected with the corresponding lifting guiding shaft and is meshed with the corresponding gear; and safety devices for preventing the lifting rack from overturning due to unbalance loading are respectively arranged at four corners of the automobile body and four corners of the lifting rack. A guiding device of the lifting rack and the lifting device are integrated in one of the lifting jacks, and guiding precision of the guiding device of the lifting rack is not affected by the automobile body and the lifting rack which has a welding structure; and the number of the used lifting jacks is small, transmission is simple, requirements on mounting precision are reduced relatively, and the comb tooth lifting type automatic carrier is easy to mount and low in debugging difficulty; and using failure rate is reduced.

The invention discloses a method for implementing a load identification interactive whiteboard, and belongs to the field of electronic information. A load identification interactive whiteboard system comprises a whiteboard (1), a mechanical sensor (2), a transmitter (3), an amplifier (4), a multi-way switch (5), an A / D sampling module (6), a data processing module (7), a communication module (8), a PC machine (9) and a projector (10). In the method, the mechanical sensor is used as a sensing element of the interactive whiteboard, and after sensor data is normalized by testing the multipoint deformation of the whiteboard, the positioning of contacts and the expression of stroke thickness are realized by using the technology of pattern recognition. The interactive whiteboard manufactured by the method has the advantages of simple structure, high reliability, low installation and maintenance requirements, low cost, high adaptability, easy implementation of large-layout manufacturing, no need of special pens and the like, and the method also can be used for manufacturing touch screens.

The invention discloses a heliostat tracking control device. The heliostat tracking control device comprises a heliostat facula calibration apparatus, a heliostat controller, a superior controller, an acceleration transducer and an incremental encoder; the heliostat facula calibration apparatus is connected with the superior controller and the heliostat controller by a heliostat field network; the superior controller is connected with the heliostat controller by a heliostat field network; the heliostat controller is in communication connection with the acceleration transducer and the incremental encoder; the acceleration transducer is attached on the backside of a mirror; the incremental encoder is disposed on the end of a rotary decelerator worm on the azimuth direction; a motor is disposed on the head of the rotary decelerator worm; and the output end of the heliostat controller is connected with the motor. The device disclosed by the invention reduces the cost of a heliostat controlling system effectively, can be installed and maintained easily, can utilize resources reasonably, and can correct the absolute errors in heliostat tracking process, thereby improving the heliostat tracking precision.

The invention discloses a grinding wheel numerically-controlled finishing control device and a control method special for face gear grinding. The device comprises a grinding wheel main shaft unit (1), a grinding wheel finishing device (2), a control device (3) and a transmission mechanism (4), wherein the control device comprises an IPC (Industrial Personal Computer), an SERCOS card, a control panel, an SERCOS optical fiber, a KE rectification power supply module, a KW main shaft control module, a KW feed control module and a PLC-IO module; the SERCOS card is mounted on the IPC through an ISA socket; the control panel is connected with the SERCOS card through a control line for sending out a control command; the SERCOS card is connected with the KE rectification power supply module, the KW main shaft control module and the KW feed control module through the SERCOS optical fiber; the KW main shaft control module is connected with a finisher main shaft motor and a grinding wheel main shaft motor; the KW feed control module is connected with each feed motor through a control line. According to the device and the method provided by the invention, the control of the numerically-controlled rectification process of the grinding wheel special for the face gear grinding is realized.

The invention relates to a vehicle automatic speed measurement method, in particular, a video processing-based illumination-adaptive multi-vehicle automatic speed measurement method. The invention aims to solve the problems of complicated calibration and high requirements for installation accuracy of an existing method for performing vehicle speed measurement on the basis of binocular stereo vision. According to the method of the invention, a camera is used to collect video images, an initial background image is built, and a speed measurement region is defined; the camera is used to collect video images to be detected, a current frame image is extracted from the video images to be detected obtained by the camera, and is preprocessed; and multi-target detection is performed, the position features and color features of vehicles are obtained, multi-target tracking is performed on the basis of vehicle position features and color features in a corresponding image detection region of a last frame image as well as corresponding vehicle position features and color features in the current frame image, and whether target vehicles drive out from the speed measurement region is judged, and the speed of the targets is measured. The method of the invention is suitable for multi-vehicle automatic speed measurement.

The invention discloses an electronic display device and an electronic device, the electronic display device includes a housing, a screen and a vibration device. At least a portion of the screen is connected to at least a portion of the housing by a flexible connection device, at least one of that screen and the house is provided with a receiving groove for fixing the flexible connection device, the flexible connecting device has elasticity, and the vibration device comprises a stator subsystem and a vibration subsystem, wherein the stator subsystem is fixedly connected with the screen througha heat insulating device, the vibration subsystem generates vibration in response to an electric signal of an external circuit and drives the stator to vibrate, and the stator drives the screen to vibrate and sound. The screen and the housing are connected by a flexible device, and the heat insulation device reduces the heat diffusion of the vibration device to the screen and effectively protectsthe screen by providing a flexible connection device accommodating groove to enhance the connection strength between the flexible connection device and the shell and the screen.

The invention aims to overcome the defects of the prior art and provides a sealed elastic compensation sleeve with reliable quality, no leakage, low cost and long service life. In the sealed elastic compensation sleeve, a sleeve is sleeved on a wall penetrating pipeline, the end of the sleeve and the pipeline are connected in a sealing way by an elastic pipe fitting, and a water-stop plate is fixed on the sleeve and embedded into a wall and connected with the pipeline into a whole. Thereby the invention realizes the function of elastic compensation and achieves the sealing effect without leakage.

The invention provides a double-stage switching system of photoetching machine wafer stage, wherein the system comprises a wafer stage operating on exposure station and a wafer stage operating on preprocess station, each wafer stage is bore by a six-freedom-degree microchecker, one wafer stage and one six-freedom-degree microchecker compose a wafer stage group, the two wafer stage groups is fixed on a rectangular base station. a group of double-freedom-degree driving units is fixed on each edge of the base station respectively, the two wafer stage groups suspends on surface of the base station by air-float bearings; the six-freedom-degree microchecker has upper and lower two layers, capable of implementing six-freedom-degree control, the double freedom degree driving units on edges of the base station is connected with the casing of the microchecker for driving the whole wafer stage group on a horizontal plane, the double-freedom-degree units on short edges of the microchecker are connected with the stator coil framework of the upper layer for driving the six-freedom-degree microcheckers moving on a horizontal plane of the upper layer stator coil. The invention avoids defects of high require process and assembly precision because of employing butt joint of guiding rails and need of butt joint auxiliary device increase, thereby greatly simplifying system structure.

The invention provides a walking device of a tractor, and relates to the field of agricultural machines. The walking device of the tractor is composed of a machine frame and a plurality of drive axle half shafts, and further comprises a plurality of triangular track walking mechanisms. Each drive axle half shaft corresponds to an inner supporting unit and an outer supporting unit on one side through the machine frame to be supported on the machine frame, and each triangular track walking mechanism is connected with one half shaft between the inner supporting unit and the outer supporting unit. The walking device is supported by the two supporting units, so that when meeting obstacles, the triangular track walking mechanisms can swing, profile modeling at any place during the advancing process of the tractor can be achieved, and stability is enhanced. Meanwhile, the walking device has the advantages of being high in crop clearance, large in grounded length, good in machine stability, narrow in track width, and capable of pressing few seedlings in a paddy field.

Disclosed are a bundled round steel end face binocular vision system and a spatial positioning and counting method. The system includes a computer (1) equipped with an image storage and processing program, a light source (2), a left camera (3), a right camera (4) and a calibration board (5). The bundled round steel end face spatial positioning and counting method includes the steps of (1) binocular camera calibration; (2) image acquisition by the left and right cameras and epipolar rectification; (3) enhancement processing of left and right images; (4) binarization of the left and right images; (5) circle recognition of the left and right images; (6) round steel counting; (7) solving of the parallax of binocular stereoscopic vision; and (8) solving of three-dimensional coordinates of centers of the round steel end faces. The system is capable of end face center three-dimensional coordinate measurement and counting of bundled round steel, and has a low requirement for the installation precision of the cameras.

The invention relates to a liquid distribution device, and particularly relates to a uniform overflow type liquid distributor used for uniformly distributing liquid on a horizontal heat exchange pipe. The liquid distributor comprises a flange, a feeding pipe, a horizontal branch pipe, a spray pipe, a folded-plate type overflow groove, a connecting channel and liquid distributing teeth, wherein the flange is arranged at a feeding opening; one end of the feeding pipe is connected with the flange, and the other end of the feeding pipe is connected with horizontal branch pipe; the spray pipe and the horizontal branch pipe are not in central butt joint, and occurrence of liquid accumulation in the spray pipe can be avoided; liquid in the overflow groove slowly increases by using the spray pipe, so that liquid overflows stably and has small fluctuation.

The invention relates to a method for automatically calibrating the measuring head polarization quantity of a polar coordinates gear measuring center. According to an existing polar coordinates gear measuring method, basic conditions are that when a measuring head is installed, the center of the measuring head must be located on the R axis, or else, the zero calibration error can be caused. The single side face of an involute gear undergoes the double-face measurement before and after being turned over, two sets of measured values are substituted into the polar coordinates method error calculation formula comprising polarization parameters, the polarization quantity and the offset quantity of the measuring head are worked out and are introduced into the workpiece measurement error calculation modifier formula, and automatic compensation for the measuring head installing error is achieved. According to the automatic correcting method, the offset quantity of the measuring head relative to the original calibration rotation center can be directly solved, the requirement for mechanical installing precision is lowered, the calibration on measuring heads can be carried out in batches, and a foundation is laid for automatically replacing the measuring heads.

The invention discloses a control rod drive wire displacement compensation device which comprises a metal corrugated pipe and a mesh cover wrapping the metal corrugated pipe. The two ends of the metal corrugated pipe are connected with connectors through connecting pipes respectively, and the connectors are perpendicular to the two ends of the metal corrugated pipe. The two ends of the metal corrugated pipe extend in parallel in the horizontal direction from the corresponding connecting pipes and then are bent to form a vertical U-shaped bend through vertical semi-arc bends and oppositely closed to form a horizontal bend through horizontal arcs. The vertical U-shaped bend is organically combined with the horizontal arc bend, and therefore compensation of displacement in the three-dimensional direction can be achieved, the corrugated structure is combined with the deformation degree of the U-shaped bend, so that the displacement compensation capacity is obviously improved, and the telescopic resistance and flexural fatigue performance are greatly improved; and therefore the service life of the displacement compensation device exceeds millions of times, and is obviously longer than that of an existing displacement compensation device. Meanwhile, the structure can be mounted in narrow space such as an annular column, the requirement for mounting precision is low, enough inner pressure and outer pressure resisting capacity is achieved, and medium leakage cannot happen within the life period.