44results about How to "To achieve error compensation" patented technology

Disclosed is a three-degree-of-freedom posture adjusting and error compensating device, which belongs to the mechanical technique field. In the invention, two threaded holes are arranged on a base plate, two through holes are arranged on the outer side of two ends of a first adjusting plate, a first and a second adjusting screw bolts are fixed in the two threaded holes on the base plate via the through holes of the first adjusting plate, two threaded holes are arranged at symmetrical positions on the inner side of two ends of the first adjusting plate and are used to fix a third and fourth screw bolts, further, a boss with a through hole is arranged in the middle of a second adjusting plate, two through holes are arranged at two ends of the second adjusting plate, and shapes of the through holes are equal to shapes of two adjusting plugs which are equipped with through holes at the center, the third and fourth adjusting screw blots are fixed in the threaded holes of the first adjusting plate via the through holes of the adjusting plugs and the through holes of the second adjusting plate, and additionally, a pad is arranged between the first adjusting plate and the second adjusting plate. The invention has simple structure and convenient operation, which can realize the three-degree-of-freedom posture adjustment and realize error compensation only by simple mechanical operations, wherein adjusting processes of the three-degree-of-freedom are relatively independent.

The invention discloses a visual-locating laser marking system correcting method. The method comprises the following steps that a galvanometric scanner is corrected, so that the laser marking effect is not distorted; the marking coordinate scaling multiple and the galvanometric scanner deflection angle are adjusted, and therefore image display can be obtained, wherein a marking object serves as a reference, and the image display is completely consistent with the marking object; a to-be-corrected marking region is determined on the marking object, the position of the marking object is compared with that of the image display, a clipping starting point of a to-be-corrected display region is determined, the position of the to-be-corrected display region is adjusted to enable the position of the to-be-corrected marking region to be completely consistent with that of the to-be-corrected display region, and therefore integrated display of the clipped to-be-corrected display region and the clipped to-be-corrected marking region is achieved finally. According to the visual-locating laser marking system correcting method, the defects that in the prior art, the correction manner is low in accuracy, and the personnel workload is large are overcome, and the marking object and image display integrated display manner is adopted, so that high-accuracy correction of a marking system and an image system is achieved, and the visual-locating marking accuracy requirements of all the current industries can be met.

The invention discloses a nine-degree-of-freedom robot tightening control method for assembling thin-walled large screw parts. The robot tightening control system includes a tightening controller, a six-degree-of-freedom Stewart platform at the bottom for adjusting the posture of the upper platform tightening mechanism, A three-degree-of-freedom series mechanism fixed on a six-degree-of-freedom Stewart platform for tightening control; the laser ranging module is used to collect the distance information between the shell and the bolts to be assembled, and the axis of the bolts and the shell is realized through the pose compensation algorithm. Pose error correction in the alignment and bonding stages; using a switching control method based on a pose / torque / rotation angle controller, and performing a segmented switching control strategy according to feedback information from various heterogeneous sensors; the invention realizes thin-walled large The automatic alignment, error compensation, and tightening control operations in the assembly of threaded parts can reduce the probability of thread pair jamming, and effectively improve the assembly efficiency and quality of thin-walled large threaded parts.

The invention discloses an error compensation method for neutron tomography rotation axis deflection angle. The method is based on the projection geometric symmetry principle of parallel beam neutron rays, and obtains by superimposing projection data within a 360-degree rotation range of a sample. A composite projected image with a unique symmetry axis, the symmetry axis of the composite projected image is the projection line of the sample rotation axis; the histogram of the pixel value gradient angle of the composite projected image is further calculated, and the histogram distribution is an even function. Find the symmetry center of the even function, and the gradient angle corresponding to the symmetry center position is the yaw angle of the rotation axis. By introducing the measured yaw angle as a correction parameter into the reconstruction algorithm, the error compensation for the yaw angle of the rotation axis can be realized, so as to ensure the consistency of the definition of each reconstructed slice of the sample and effectively improve the reconstruction accuracy.

The invention discloses a method for controlling a working track of an aerial work platform and belongs to the technical field of aerial work platform control. The method comprises the following concrete steps: (1) presetting a working surface, vertically placing a working arm on the working surface, recording an initial arm length, an elevation angle and a revolution angle of the working arm, and then calculating the position of the working surface; (2) performing data operation and logic treatment, and reading the arm length, the elevation angle and the revolution angle of the working arm; (3) acquiring the arm length, the elevation angle and the revolution angle of the working arm; (4) calculating the actually required arm length, elevation angle and revolution angle of the working arm; (5) calculating the arm length and the elevation angle of the working arm needed to be compensated at any revolution angle; and (6) outputting a PWM (pulse width modulation) value by a solenoid valve which controls the stretching and amplitude, thereby realizing the error compensation. The method provided by the invention has the beneficial effects that the motion on the whole working surface is realized, the trouble in frequently positioning in the operation process is reduced, the working process is smoother, safer and more reliable, and the collision accident is reduced.

The invention discloses a heavy and extra-large structural member saw-cutting device and a saw-cutting method thereof. A two-wheel type sawing machine for saw-cutting a large structural member requires the matching of large-dimensional saw belt wheels, so that the production cost is greatly improved. The invention relates to the heavy and extra-large structural member saw-cutting device which comprises a rack, a three-wheel saw-cutting mechanism, a feeding hydraulic oil cylinder, a working table, a guiding and correcting mechanism, a workbench and a clamping assembly. The three-wheel saw-cutting mechanism comprises a saw frame, a driving belt saw wheel, a saw belt, a middle saw belt wheel and a driven saw belt wheel. The guiding and correcting mechanism comprises a guiding block, a correcting movement plate, a correcting swinging worm, a correcting swinging worm wheel, a correcting drive piece and a torsion motor. The working table comprises a swinging table, a moving table, a transverse movement drive piece, a swinging spring and a swinging air cylinder. According to the heavy and extra-large structural member saw-cutting device and the saw-cutting method thereof provided by the invention, a traditional two-saw-belt-wheel transmission structure is changed into a three-saw-belt-wheel transmission structure, so that the defect that the conventional two-saw-belt-wheel sawing machine requires the diameter of each saw belt wheel to be larger than the diameter of a workpiece is overcome, and the volume and the height of the whole machine are greatly reduced.

The invention provides a scanning trigger control method and device of a CT machine and a CT machine. Among them, the rotation angle of a scan cycle is divided into M angle segments; and the reference sampling period, and the reference rotation duration and reference sampling quantity corresponding to each angle segment are determined in advance; when performing a CT scan, start from the first angle segment At the beginning, for each angle segment, when the sensing signal at the beginning of the angle segment is received, the timing of the current rotation duration of this angle segment is started, and after delaying the sampling time corresponding to several samples, the corresponding sampling of this angle segment is started , when receiving the sensing signal at the end of the angle segment, the current rotation duration of the angle segment is obtained; the difference between the current rotation duration of the angle segment and the reference rotation duration is calculated, and the difference is passed through the angular segment The sampling time corresponding to several samples in the corresponding remaining sampling quantity is compensated. The technical scheme of the invention can compensate the speed error of the rotating frame.

The invention relates to a multi-degree-of-freedom self-assembled nano-robot and a production control method thereof. The nano-robot is self-assembled by micro-nano particles and four deoxyribonucleic acid chains through the strong interaction between gold-sulfhydryl bonds or streptavidin and biotin. formed into quadruped nanorobots. By depositing circular gold electrodes on the four vertices of the square on the silicon-based material, four nanoholes are processed on the circular gold electrodes at the same time; the size of the nanoholes makes each nanohole only able to Captures a strand of DNA. Since the nano-gold electrode is connected to an external voltage source, by adjusting the direction and magnitude of the voltage on each nanopore, the electrical and intensity of the charge density on the nanopore can be adjusted, thereby controlling the direction and intensity of the electroosmotic flow through the nanopore, and it is compatible with deoxidation. The electric field force suffered by the ribonucleic acid chain forms a joint or competitive drive, thereby controlling the movement speed and direction of the nanorobot.

The invention relates to the field of geometric quantity measurement, in particular to a steel plate crown measurement method. The steel plate crown measurement method with error compensation comprises the following steps of measuring a standard gauge block by using a laser convexity measurement system, comparing the obtained data with a gauge block nominal value to obtain error compensation quantity, fitting nonlinear error compensation quantities of multiple different standard gauge blocks through multiple measurements to obtain a linear error compensation curve, and then compensating the measurement data of a practical measured steel plate by utilizing the error compensation curve to finally obtain the real measurement result with high precision. The invention realizes the error compensation within whole measurement range, improves one order of magnitude on the precision in comparison with the traditional measurement method, and can guarantee the measurement precisions of the steelplates with different thickness changeless. The invention can realize the high-precision measurement on the convexity of the steel plate with random thickness within 1-30mm, and the measurement precision can be up to 3 micrometers; and the invention avoids the influence of inference from the site environment and is suitable for the popularization on the steel production line under various complexenvironments.

The invention relates to a water conducting domestic appliance (1) that has a container (2) holding a heated liquid, a reservoir (12) for receiving liquid, said reservoir being connected to the container (2) in a heat-conducting manner, and at least one component (16-19, 29, 30) that permits and / or supports the intended operation of the reservoir (12). Said component (16-19, 29, 30) is integratedinto the reservoir (12).

The invention provides an improved bidirectional and bilateral ranging method. In this method, the mobile node continuously transmits two signals to all fixed reference nodes. Among these fixed reference nodes, one is the master fixed reference node, and the rest are slave fixed reference nodes. The mobile node transmits the time synchronization signal twice, and the main fixed reference node sends a time synchronization response signal to complete the measurement of the distance difference between the mobile node and the main and slave fixed reference nodes. At the same time, the second time synchronization signal sent by the mobile node and the main fixed reference node The time response signal sent by the reference node is used as the first two frame signals in the two-way bilateral ranging. The method in the present invention has the advantage of high positioning accuracy of the two-way bilateral ranging method; at the same time, multiple distance differences can be measured only by transmitting the time synchronization signal twice through the mobile node, and then can be measured at one time to obtain the distance between the mobile node and each distance. The distance of the reference node is fixed, and the power consumption is relatively low, which solves the problem of long time-consuming two-way and bilateral ranging.