21results about How to "Eliminate accumulated errors" patented technology

The utility model provides track inspection equipment. The track inspection equipment comprises a vehicle body, and a steel rail detection device, a fastener detection device, an evacuation platform detection device, a ballast bed detection device, a drainage ditch detection device, a synchronous positioning system and a main control unit which are arranged on the vehicle body, wherein the steel rail detection device, the fastener detection device, the evacuation platform detection device, the ballast bed detection device and the drainage ditch detection device are all in communication connection with the main control unit, and the main control unit is in communication connection with the synchronous positioning system. According to the utility model, steel rails, fasteners, evacuation platforms, ballast beds and drainage ditches around the vehicle body are detected according to image information, the detection content is more, the accuracy is high, the daily public work detection content of urban rail transit is basically covered, the labor intensity is effectively reduced, and the detection efficiency is high.

The utility model belongs to the technical field of track detection, and particularly discloses a tunnel detection vehicle. The tunnel detection vehicle comprises a vehicle body, and a tunnel three-dimensional detection device, a tunnel appearance detection device, a tunnel internal structure detection device, a synchronous positioning device and a main control device which are arranged on the vehicle body, the tunnel three-dimensional detection device, the tunnel appearance detection device, the tunnel internal structure detection device and the synchronous positioning device are all in communication connection with the master control device. The tunnel detection vehicle not only can complete the inspection work of the tunnel of the urban rail transit line in a short time, is high in detection efficiency, but also can realize intelligent comprehensive detection on various diseases and faults, and is high in detection accuracy.

The utility model discloses a gear-adjustable electric bean grinder which comprises a main machine shell, a fixed motor fixedly arranged on the main machine shell, a driving rod axially connected with an output shaft of the motor in a sliding mode, a first grinding disc connected with the driving rod and a second grinding disc arranged in the main machine shell and matched with the first grinding disc for grinding. The upper end of the main machine shell is rotationally connected with an adjusting knob, a bean inlet channel allowing beans to pass through is formed between the inner wall of the main machine shell and the motor, an opening is formed in the main machine shell and communicated with the bean inlet channel, a lifting rod is arranged in the main machine shell, and one end of the lifting rod is matched with the adjusting knob through a linkage assembly. One end of the lifting rod is connected with the main machine shell, the other end of the lifting rod is connected with the driving rod, the adjusting knob drives the lifting rod to move up and down relative to the main machine shell through the linkage assembly, when the lifting rod moves up and down, the gap between the first grinding disc and the second grinding disc changes, and the electric bean grinder is simple in structure, good in use stability and high in adjusting precision.

The invention provides an optical fiber DAS phase demodulation method and demodulation device. The demodulation method comprises the following steps: S1, acquiring a digital signal of a sensing optical fiber under each pulse signal; s2, after sub-band extraction and matched filtering are carried out on the digital signal under each pulse signal and the digital signal under the pulse signal at a preset interval from the digital signal, adjacent differential rotation vector summation processing is carried out, and a complex signal is obtained; s3, solving a phase angle for each complex signal, and performing phase angle expansion to obtain a phase signal; s4, performing spatial differential processing on each phase signal to obtain a phase demodulation signal; s5, according to a preset optical fiber sampling position, extracting a sampling point corresponding to the optical fiber sampling position in each phase demodulation signal to obtain a vibration signal; windowing processing, FFT conversion, frequency domain compensation, IFFT conversion and windowing processing are sequentially carried out on the vibration signal, and a result is output. Accumulated errors can be eliminated, and a complete frequency response range can be reserved.

The invention discloses an optical path centering device of a high-energy ion implanter. The optical path centering device comprises a flat transparent module, an energy transparent module, a radio frequency module, an analyzer, an energy transparent laser mounting plate, a flat transparent laser mounting plate and a three-electrode centering tool, the flat transparent module, the energy transparent module, the radio frequency module and the analyzer are all mounted on the floor silk screen; the laser-permeable mounting plate is mounted on a magnet yoke of the laser-permeable module, and the flat-permeable laser mounting plate is mounted on a magnet yoke of the flat-permeable module and used for placing a laser instrument; when light path centering is carried out, a laser instrument is firstly placed on the flat-transparent laser mounting plate, and laser penetrates out of the flat-transparent outlet and then penetrates out of the transparent inlet and the transparent side part by adjusting the positions of ground feet of the flat-transparent module and the transparent module; and then the laser instrument is moved to the laser-permeable mounting plate, and the anchor positions of the radio frequency module and the analyzer are respectively adjusted, so that the laser sequentially penetrates out from the permeable inlet, the radio frequency outlet, the radio frequency inlet, the analyzer outlet and the analyzer inlet. The device has the characteristics of compact structure, convenience in operation, high stability and the like.

This invention provides a method for zeroing the cumulative error of a sensor under any mechanical transmission ratio, applicable to scanning turntables with any mechanical transmission ratio, and accurately measuring turntable position changes under any transmission ratio. The invention involves installing a light-shielding plate with a width of 3-4 mm on a rotating shaft. The light-shielding plate rotates with the shaft, while a photoelectric sensor is installed on a stationary frame, serving as a signal generator to zero the cumulative error. This method is low-cost, has simple hardware circuitry, and can accurately measure turntable position changes under any transmission ratio.

The application discloses to the technical field of high-speed cable production, and particularly relates to a size compensation riveting terminal equipment, which comprises a Y-axis moving part one, a terminal conveying flow channel and a feeding part located at the upper end of the Y-axis moving part one, a solder paste spraying unit and a riveting unit arranged on the moving end of the Y-axis moving part one, a feeding belt conveying part arranged on the moving end of the Y-axis moving part one, and a wire bending unit located below the riveting unit; the error processing assembly is further arranged below the terminal conveying flow channel, and the error processing assembly comprises a cylinder four fixed on the moving end of the Y-axis moving part one; the wire after bending is slightly straightened by the clamping jaw in the error processing assembly; the elasticity rebound of the wire is calibrated, the straight line segment direction of the wire from the bending point to the end part is ensured to be consistent, the "loose rope" is tightened, and most of the accumulated errors are eliminated from the physical source, so that the pressure of the subsequent compensation system is significantly reduced.

The application discloses a rotational mould inner container boss positioning debridement system and a use method, which comprises a coaxial positioning assembly, an inner container fixing assembly and a cutting debridement assembly, wherein the coaxial positioning assembly comprises a positioning bearing, the positioning bearing comprises a bearing bush and a bearing sleeve, the bearing bush is provided with a through cutting channel, the bearing sleeve is coaxially sleeved outside the bearing bush and is movable in relative rotation around the axis with the bearing bush, an outer thread section is arranged outside the bearing sleeve, and the bearing sleeve is fixedly connected with the boss interface of the inner container through screw threads; the inner container fixing assembly is used for fixing the inner container; the cutting debridement assembly comprises a cutting tool bit, a tool bit driving unit and a closed-loop control unit, is used for driving the cutting tool bit to rotate and displace to complete interface shaping, the positioning bearing is threadedly locked with the boss interface through the bearing sleeve, the high-precision rotation characteristics of the bearing are utilized to ensure the absolute coaxiality of the cutting tool bit and the boss interface, and the inner and outer ring separation design is adopted to avoid the boss interface being scratched by the rotating part.

The present invention relates to the field of digital measurement technology, and discloses a scanning system, a calibration device for the scanning system, and a calibration method. The scanning system includes a laser scanning head and a binocular tracker, wherein the laser scanning head is configured to detect the surface of a part to be measured placed in a tracking area; a plurality of binocular trackers are provided, the tracking fields of the plurality of binocular trackers are adjacent, and the sum of the tracking fields of the plurality of trackers covers the tracking area; the binocular trackers are configured to track the laser scanning head, and the coordinate information of the laser scanning head acquired by the plurality of binocular trackers is based on a tracking coordinate system. The present invention effectively increases the tracking area by providing a plurality of binocular trackers with adjacent tracking fields of view; the plurality of binocular trackers are based on a tracking coordinate system, and the accumulated error in coordinate conversion between the plurality of traditional binocular trackers is eliminated, and the conversion accuracy between the binocular trackers is effectively improved, which is conducive to ensuring the reliability of the measurement data.

The utility model discloses a kind of rotating devices, belong to X-ray automatic detection equipment technical field, specifically related to a kind of high-precision X-ray source intelligent rotating device, comprising: driving motor, installation bottom plate, hollow rotating platform and X-ray source assembly;The driving motor is installed in the rear side of the installation bottom plate, the hollow rotating platform is installed in the front side of the installation bottom plate, and the X-ray source assembly is installed on the hollow rotating platform;Arranged on the installation bottom plate is in-place inductor and limit block;The X-ray source assembly is provided with the inductive sheet matched with the in-place inductor;The utility model uses hollow rotating platform as core rotating element, and is directly driven by motor, and this design reduces the generation of cumulative error from the root, ensures the high-precision rotating performance;And simplify overall structure, under the premise of guaranteeing function, reduce volume, weight and cost, show significant technical advantage.

The utility model discloses an off-line arc alignment device for simulating an on-line continuous casting withdrawal and straightening machine, and belongs to the technical field of metallurgical rolling equipment. The device comprises an arc alignment table and an arc alignment sample plate installed on the arc alignment table, the arc alignment table comprises an off-line base and a plurality of positioning assemblies installed on the off-line base at intervals, and different withdrawal and straightening units in the withdrawal and straightening unit are supported and positioned through the multiple positioning assemblies; the positioning assembly comprises a connecting bottom plate and a positioning assembly seat; a bottom plate groove is formed in the top of the connecting bottom plate, and the connecting bottom plate is mounted at the top of the offline base; positioning center holes symmetrically distributed on the two sides of the third reference surface are formed in the outer side; measuring center holes are formed in the outer sides of a first positioning block, a second positioning block, a third positioning block and a fourth positioning block in the positioning assembly seat; according to the scheme, the arc table is optimally designed, so that the machining, adjusting and measuring processes of the arc table can be simplified.

The invention relates to the technical field of BT knife handles, in particular to a modular interface structure of a universal quick-change knife handle, which comprises a knife handle, a blind rivet and a thermal shrinkage rod, the knife handle is composed of a circular truncated cone section and a circular ring section, the interior of the knife handle is of a hollow structure, a first threaded hole is formed in the left end of the circular truncated cone section, and a second threaded hole is formed in the right end of the circular ring section; the blind rivet is in threaded connection with the cutter handle through the first threaded hole, and the thermal shrinkage rod is in threaded connection with the cutter handle through the second threaded hole. The blind rivet and the thermal shrinkage rod are designed into detachable and replaceable independent modules and are in standardized threaded connection with the knife handle, and accumulated errors which are difficult to control in multi-stage assembly are structurally eliminated; the thermal shrinkage rod is used as an independent standardized function module, and the universal threaded connector at the tail end of the thermal shrinkage rod can adapt to various knife handles with different standards and specifications.

The utility model discloses a wall-hung adjustable gradienter placing support, which belongs to the technical field of building construction and comprises a vertical keel, positioning components for positioning the use position of the vertical keel are arranged at the upper end and the lower end of the vertical keel, and a vertically movable shell is slidably mounted on the surface of the vertical keel. A mounting assembly for mounting a gradienter is arranged on one side of the up-and-down movable shell, and a sliding assembly is arranged between the up-and-down movable shell and the vertical keel; according to the utility model, through the arrangement of the positioning assembly, the vertical keel can be mounted on a decorative wall surface, through the arrangement of the mounting assembly, the gradienter can be mounted on the up-down movable shell, and a user can adjust the horizontal height of the gradienter by moving the use position of the up-down movable shell; the gradienter can ascend along with the decoration face, operators do not need to manually ascend and descend the elevation, accumulated errors are eliminated, construction efficiency is improved, rework is reduced, and quality impression is improved.

The invention discloses a method, system, device and medium for indoor three-dimensional reconstruction of multi-sensor fusion, which belongs to the technical field of three-dimensional reconstruction, collects laser radar point cloud data, odometer data and RGB-D data of each frame when the robot moves; obtains the current frame posture of the robot; judges whether the current frame is a key frame according to the change of the current frame posture, and if so, stores the current frame in the key frame set; if not, judges whether the next frame is a key frame; obtains RGB-D data that matches the current key frame time, and generates a color point cloud according to the matching RGB-D data and the current frame posture; performs loop detection on the current key frame, and optimizes the posture of all key frames by graph optimization; uses the posture of all optimized key frames to correct and fuse the spatial position of the generated color point cloud to generate the final color point cloud for indoor three-dimensional reconstruction. The posture calculation of the invention is based on single-line laser data, with small calculation amount and high precision.

The invention provides a horizontal four-axis synchronous positioning method for a vertical rail shuttle vehicle, and belongs to the field of logistics storage. A method for establishing an original point for system operation calculation based on a dynamic original point calibration process in combination with hole positioning and an absolute value type encoder is provided, a data structure for mapping physical goods allocations and absolute coordinate values is established through a goods allocation coordinate table, and a position closed-loop control means of multi-axis synchronization and external position loop control is dynamically implemented. Therefore, the design purpose of remarkably improving the positioning precision and reliability is achieved. Comprising the following execution steps: step (1), calibration; (2) initializing a system and calculating an absolute position; and (3) four-axis synchronous closed-loop motion control is carried out.

This application discloses a cleaning device and a cleaning system. The cleaning device includes a main body, cleaning components, an encoder, a controller, and a zero-position detector. The encoder includes a disk and an encoder board, which work together to acquire the rotation angle of the shaft. The controller controls the operation of the drive components based on the rotation angle of the shaft. The zero-position detector is fixed relative to the main body, and the controller controls the cleaning components to move to the initial position that triggers the zero-position detector when the cleaning device is started. This application designs an encoder board that works with the disk to acquire the rotation angle of the shaft, allowing for a smaller device size and better adaptation to compact cleaning devices. The zero-position detector establishes an absolute position reference for the initial position. When calculating the outward movement distance of the cleaning components relative to the main body, this initial position can be used for calculation, which helps eliminate accumulated mechanical backlash errors and improves the accuracy of the outward movement distance of the cleaning components relative to the main body.

This application relates to the field of fuel cells, disclosing an integrated injection current collector and its processing method, an inlet end assembly, and a fuel cell stack. The integrated injection current collector includes a current collector body and a sealing compound. The sealing compound is injection molded and bonded to the current collector body. The sealing compound covers the circumferential edges of each of the two sets of three-cavity ports on the current collector body and isolates them from the medium of the fuel cell stack. A sealing protrusion perpendicular to the current collector body is provided on both circumferential sides of each cavity of the sealing compound, and each sealing protrusion extends outward beyond the side of the current collector body itself. The integrated injection current collector, its processing method, inlet end assembly, and fuel cell stack of this application integrate the seal between the integrated injection current collector and the single cell and the inlet end insulation plate into one unit, eliminating the need for double-sided sealing strips on the single cell, isolating the three cavities from the medium, and eliminating the need to process sealing grooves on the core side of the inlet end insulation plate, thus eliminating cumulative errors and improving sealing performance.

This utility model discloses a fair-faced concrete formwork support system, including a formwork. Multiple equidistantly arranged Z-shaped steel beams are vertically fixed to the outer wall of the formwork. Multiple fixing holes are opened on the outer edges of both sides of the Z-shaped steel beams. These fixing holes are fixed to one side of the outer wall of the formwork using self-tapping screws. Multiple connecting grooves are opened on the outer wall of the Z-shaped steel beams. Multiple sets of channel steel main beams are fixed to the inner wall of the connecting grooves using T-bolts. Multiple sets of connecting holes are opened on the outer wall of the channel steel main beams. Two opposing channel steel main beams are connected by multiple sets of M12 bolts, forming a double-row channel steel system. The double-row channel steel system is fixed to one side of the outer wall of the formwork using five-section tie rods. The inner wall of the formwork is filled with concrete. This formwork support system can be mainly applied to fair-faced concrete formwork systems, facilitating the assembly of a large formwork system on a platform and on-site formwork assembly via lifting, thus improving the efficiency and quality of fair-faced concrete wall construction.

The present application relates to the field of autonomous driving technology, and discloses a method, device, equipment and storage medium for generating a high-precision map, wherein the method includes obtaining the radar point cloud of the current frame of the vehicle in real time; setting the first frame of radar point cloud as the first key frame, performing point cloud registration on the radar point cloud of the current frame to the first key frame, and obtaining the mapping pose of the current frame; establishing a key frame queue based on the mapping pose, and sequentially setting the next frame of radar point cloud for point cloud registration; adjusting the radar point cloud of each frame according to the key frame of the key frame queue, and constructing a local map based on the adjusted radar point cloud of each frame; establishing an error equation of adjacent local maps based on the pose of the local map and the point cloud registration data; adjusting the pose of the local map until the error value of the adjacent local map in the error equation is minimized; and establishing a global map through the adjusted pose of the local map. The present application has the effect of improving the failure of vehicle positioning and navigation in time-varying scenarios.

This invention relates to the field of machine tools, and particularly to an integrated processing and manufacturing device for excavator guard plates. The device includes a disc-shaped frame with a rotary table at its center for rotational limiting. A processing device is mounted on the frame corresponding to the rotary table. The processing device includes a limiting component, several processing mechanisms, and a drive mechanism. Through the circumferentially distributed layout design of the rotary table and several processing mechanisms, this invention achieves integrated continuous processing of excavator guard plates, from laser cutting and welding to surface deburring. The guard plate only needs to be clamped and positioned once during the entire processing flow, eliminating the need for transfer and transport between multiple devices. This effectively eliminates the cumulative errors caused by multiple positioning and unloading operations, improves the consistency of positional accuracy and processing efficiency between processes, and avoids the problem of occupying large amounts of space due to the use of multiple devices.

This invention discloses an absolute planar two-dimensional time-grating displacement sensor and measurement method based on an alternating electric field. Excitation signals are sequentially applied to the X-excitation pairs. When the sensing electrode generates a sensing signal, the application of excitation signals to the remaining X-excitation pairs is stopped. By processing the four electrical signals generated by the sensing group, the position of the moving scale substrate within the X-excitation pair and its displacement position within that pair are obtained, thus yielding the absolute two-dimensional time-grating displacement value of the moving scale substrate relative to the fixed scale substrate in the X direction. Similarly, the absolute two-dimensional time-grating displacement value of the moving scale substrate in the Y direction is obtained. Then, the absolute two-dimensional time-grating displacement values ​​in the XY directions are used as the coordinates of the moving scale substrate in the XY directions, thus obtaining the absolute displacement of the moving scale substrate. This invention uses a scanning method to obtain the absolute position in the XY directions to achieve planar two-dimensional absolute displacement measurement, which can reduce cumulative and random errors, improve measurement accuracy, and achieve high-precision measurement over a large range.