614results about How to "Low installation accuracy requirements" patented technology

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.

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 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 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 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 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 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.

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 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.

The invention belongs to a measurement method class and particularly relates to a precision measurement method for one-dimensional displacement. The precision measurement method is characterized by including that an emission electrode insulating substrate is installed on a fixed reference object, a receiving electrode insulating substrate is installed on a moving object, emitting electrodes and receiving electrodes are kept parallel, small air gaps are reserved between the emitting electrodes and the receiving electrodes, a high-frequency sinusoidal voltage source stable in frequency and amplitude is utilized to excite an odd-number electrode interconnecting bus of the emitting electrodes, a high-frequency sinusoidal voltage source identical in frequency and opposite in amplitude and phase position is utilized to excite an even-number electrode interconnecting bus of the emitting electrodes, two interconnecting buses of the receiving electrodes are respectively connected to a signal detection circuit, and displacement, motion speed and motion direction of the to-be-detected object corresponding to the fixed object can be calculated by judgment of relative relation of amplitude of two high-frequency voltage output signals and the phase positions of the receiving electrodes. The precision measurement method is flexible, high in measurement precision, low in requirements on mounting precision of a sensing part and easy to promote and apply in low-cost automation devices.