14results about How to "Achieve precise calibration" patented technology

The invention discloses a flight control platform for an autonomous unmanned aerial vehicle swarm system, belongs to the technical field of unmanned aerial vehicles, and aims at solving the problem that the cooperative operation and flight safety of an unmanned aerial vehicle swarm are influenced by inaccurate positioning caused by the fact that a GPS signal is easily interfered or shielded, and the flight control platform comprises a control center used for controlling the unmanned aerial vehicle swarm to fly to a predetermined airspace and controlling the unmanned aerial vehicle swarm to fly to the predetermined airspace. The control center is used for receiving the state information of the unmanned aerial vehicle nodes sent by the aerial base station and determining the control information of the position, the posture and the mode of the unmanned aerial vehicle swarm in real time, the control center comprises a formation module, a track module, a parameter control module, a wireless connection unit and a data processing unit, and the aerial base station is used for receiving the control information sent by the control center; according to the invention, through a wireless communication networking positioning method, accurate position positioning of each unmanned aerial vehicle node in an unmanned aerial vehicle swarm is realized, a complex flight task can be efficiently and accurately completed, and the safety and reliability of the task are ensured under the support of real-time state monitoring and dynamic adjustment.

The invention belongs to the field of mechanical research of natural gas hydrate sediments, and provides a hydrate-containing sediment discrete element model mechanical parameter calibration method, which comprises the following steps: S1, sample preparation and triaxial shear test; s2, respectively constructing discrete element models for the four sediment samples in the step S1; s3, performing staged calibration on mechanical parameters of the sediments with different components; and S4, outputting a discrete element model result. According to the method, four samples are prepared aiming at the muddy silt hydrate-containing sediments, different contact models are adopted according to the mechanical characteristics of different components of the samples, the model complexity is gradually increased from a single component to multiple components through staged calibration, it is ensured that the mechanical behavior of each component can accurately reflect actual experimental data, and the experimental accuracy is improved. Through combination of experiments and numerical simulation, accurate calibration of micromechanical parameters of the muddy silt hydrate-containing sediment discrete element model is realized, and the accuracy of the discrete element model is improved.

The invention discloses a calibration method and system and coating equipment. The calibration method comprises the following steps: placing a standard block between each coating hole and a corresponding mask roller, enabling a first surface of the standard block to face the coating hole, and enabling a second surface of the standard block to face the mask roller; the highest points of the mask rollers are located under the standard blocks, and the poses of the mask rollers are adjusted, so that the distance between the highest point of each mask roller and the corresponding second face is equal to a second preset value; the pose of the coating head is adjusted, so that the distance between each coating hole and the corresponding first surface is equal to a third preset value; the standard block is moved away, the coating head is moved downwards, the downward moving distance is the thickness of the standard block, and the distance between each coating hole and the highest point of the corresponding mask roller is made to be a first preset value. According to the invention, the pose of the mask roller and the coating head can be quickly adjusted, so that the distance between each coating hole and the mask roller reaches a preset first value.

The application discloses a FinFET device temperature-dose coupling modeling method, and belongs to the field of advanced semiconductor technology. The application solves the problem that a traditional irradiation model cannot give the degradation rule of a FinFET device under different temperature-dose. The application constructs a multi-physical field coupling nonlinear irradiation model, overcomes the limitation that a traditional total dose model only depends on the electric field intensity, effectively breaks through the limitation that a hole yield in the traditional model is only affected by the electric field and cannot reflect the degradation rule under different temperature-dose, and guarantees the accuracy of simulation results. Based on experimental data feedback, the application realizes dynamic correction of coupling factors, and improves the precision of the temperature-dose coupling model. By extracting the electrical characteristic parameter drift, the application constructs an analytical function of the evolution of the coupling factors with temperature and dose, and realizes accurate parameterization characterization of the radiation-induced trap charge accumulation process under different temperature-dose. The application can be applied to temperature-dose coupling modeling of a FinFET device.

The application relates to a swing angle measuring and calibrating device of an artificial joint friction and wear test system, which is characterized by comprising a first connecting shaft, a second connecting shaft, a locking sleeve, a special-shaped flange, an incremental encoder and a laser instrument, the head of the first connecting shaft is used for fixedly connecting a first swing arm of the artificial joint friction and wear test system, the tail of the first connecting shaft is vertically provided with the second connecting shaft, the second connecting shaft is installed at the upper end of the special-shaped flange, the installation position of the second connecting shaft can be adjusted along a radial direction of the upper end of the special-shaped flange, and the lower end of the special-shaped flange is coaxially provided with the incremental encoder; and the laser instrument is coaxially installed at the center of the upper end of the special-shaped flange. The device can convert the swing of the swing arm of the artificial joint friction and wear test system into the self-rotation of the incremental encoder, so that the swing angle of the swing arm of the artificial joint friction and wear test system can be accurately calibrated.

The invention discloses an automatic drilling and tapping all-in-one machine, and relates to the technical field of machinery, the automatic drilling and tapping all-in-one machine comprises a bearing driving seat, and the side end of the top of the bearing driving seat is provided with an automatic claw clamp adjusting and fixing seat; according to the invention, under the cooperation of the self-adaptive position correction assembly, the contact adjustment formed dynamically is utilized, so that the stress contact piece can form contact with the other side of the processing position of the workpiece during processing, the accumulated positioning error is reduced, the accurate calibration of the position of the workpiece is realized, and the position deviation is controlled within an extremely small range; the position and angle of the temperature control phase change adjusting structure are dynamically adjusted according to the temperature change of different parts of the workpiece under the cooperation of the thermal change auxiliary regulation and control assembly, the problem that the machining precision is reduced due to the fact that the local temperature is too high is effectively solved, the quality stability and consistency of products are improved, the temperature fluctuation range of the workpiece is reduced by 50%-70%, and the machining efficiency is improved. And material thermal stress and deformation caused by temperature fluctuation are reduced, the service life of the cutter is prolonged, and the machining efficiency is improved by about 20%-30%.

The invention belongs to the technical field of quantum physics and quantum measurement, and particularly relates to a quantum magnetic label based on an interlayer weak coupling device and a preparation method of the quantum magnetic label. In order to realize high-precision magnetic field intensity calibration in a low-temperature strong magnetic field environment, under the conditions of low temperature (such as T = 5K and below) and strong vertical magnetic field intensity (B = 5T and above), the magnetic field intensity is calibrated; and establishing a linear scale relationship delta D / B = e2 / h between a magnetic field and an interlayer displacement electric field difference value by using a quantization phenomenon of a ratio of the interlayer displacement electric field difference value to the magnetic field intensity in a quantization checkerboard formed by intersecting quantization Landau energy levels of longitudinal resistance in a large-angle rotation angle graphene system, so as to realize calibration of the magnetic field intensity B.

The invention provides a parameter calibration method, computer equipment and a storage medium, and the parameter calibration method comprises the steps: obtaining a plurality of image sets under the same target color temperature, the plurality of image sets being image sets corresponding to a plurality of illumination intensities; determining a first parameter pair corresponding to each image in each image set to obtain a plurality of first sets; determining a second parameter pair in each first set in the plurality of first sets to obtain a plurality of second parameter pairs; the second parameter pair is the first parameter pair with the minimum chromatic aberration in the first set; and screening out a target parameter pair corresponding to a target color temperature from the plurality of second parameter pairs, and calibrating camera parameters under the target color temperature based on the target parameter pair. According to the scheme, the multi-illumination-intensity image set is combined under the same target color temperature, white balance and color correction parameter selection are optimized, and the color consistency and precision of an image processing link are improved.

This invention discloses a calibration circuit, a chip including the same, and a calibration method. The calibration circuit according to an embodiment of the invention includes an input terminal for receiving a voltage control signal, wherein the voltage control signal is directly or inversely proportional to an ideal output voltage; a sampling unit connected to the output terminal to sample and obtain a test voltage; a first test voltage being a test output voltage corresponding to a first ideal output voltage, and a second test voltage being a test output voltage corresponding to a second ideal output voltage; an arithmetic unit obtaining a proportional deviation parameter based on the first test voltage, the voltage control signal corresponding to the first test voltage, the second test voltage, the voltage control signal corresponding to the second test voltage, and the directly or inversely proportional relationship; and a proportional adjustment unit adjusting the output voltage signal according to the proportional deviation parameter. The calibration circuit and the chip including the same according to an embodiment of the invention can achieve accurate calibration across the entire adjustment range.

The present application relates to the technical field of overhaul of hydroelectric generating set, in particular to a seat ring fixed guide vane opening construction method and a construction device, the method uses the geometric information of the fixed guide vane or its adjacent structure to deduce the datum point of the opening, obtains the first coordinate of the datum point; the profile feature of the fixed guide vane is matched with the datum point of the opening, the second coordinate of the datum point is obtained; the deviation value between the first coordinate and the second coordinate is calculated, the deviation value is compared with the preset threshold value, and the accurate coordinate of the datum point is determined based on the comparison result; the contour line of the opening is determined according to the accurate coordinate and the actual size of the opening; the opening operation is performed according to the contour line of the opening; the present application realizes the accurate calibration of the position to be opened by checking and correcting the positioning results obtained by two ways; then the systematic opening operation including layered drilling, cutting communication, and precise shaping of the orifice and the guide vane head is performed.

The invention discloses an offshore dynamic calibration method and system of a multi-degree-of-freedom binocular vision system. The calibration method comprises the following steps: S1, establishing a ship body coordinate system on a ship; s2, internal reference calibration of the binocular camera; s3, calibrating a first camera coordinate system and a double-axis tilt angle sensor coordinate system; s4, performing static calibration on the first camera coordinate system and the world coordinate system; s5, calibrating external parameters of the binocular camera; and S6, dynamically calibrating the coordinate systems of the first camera and the second camera and the world coordinate system. According to the invention, special requirements of the marine dynamic environment can be met through innovative design, accurate calibration of the binocular camera in the marine dynamic environment can be realized, and high precision and high reliability of the binocular stereoscopic vision system in the marine environment can be ensured, so that special challenges in the marine environment can be adapted, and the calibration accuracy of the binocular camera is improved. According to the invention, high-precision measurement of a target object in a marine dynamic environment can be realized, so that the precision and safety of marine operation are improved, and important technical support is provided for ocean engineering.

The invention discloses an unmanned aerial vehicle bridge and tunnel space crossing adsorption method based on SLAM. The method comprises the steps that when the unmanned aerial vehicle passes through a bridge and tunnel space, a monocular camera is used for shooting an environment image, and a laser radar is used for collecting depth information; performing initial pose calculation on the environment image to obtain an initialized map; after the pose of the unmanned aerial vehicle is changed, correcting the initialized map through depth information and resolving the initialized map into spatial points so as to obtain a dense map; and correcting mapping errors of the dense map, performing plane clustering division to calibrate an adsorbable area, controlling the unmanned aerial vehicle to be adsorbed on the adsorbable area when the unmanned aerial vehicle passes through the bridge and tunnel space, and realizing passing adsorption of the unmanned aerial vehicle in the bridge and tunnel space. According to the method, the adsorption area where the unmanned aerial vehicle can be parked can be calibrated according to the environment condition after SLAM mapping, map information is corrected and corrected through closed-loop similar scene detection, the pose error and the coordinate point parameter error of the unmanned aerial vehicle are accumulated, and accurate calibration of the parking position when the unmanned aerial vehicle passes through is achieved.

The present invention relates to the technical field of torque calibration, and discloses a calibration device and a calibration method for a torque measurement system. The calibration device for a torque measurement system comprises a spindle mechanism and calibration components symmetrically arranged on both sides thereof. The spindle mechanism comprises a spindle, and test pieces in a torque measurement system to be calibrated are arranged at both ends of the spindle. The test pieces measure the torque T at both ends of the spindle. 实测 The calibration assembly includes a test gearbox, a torque meter and a torsion bar. The low-speed stage of the test gearbox is connected to the end of the main shaft. One end of the torque meter is connected to the high-speed stage of the test gearbox, and the other end is connected to the torsion bar. The torsion bar on one side of the main shaft mechanism is fixed, and the torsion bar on the other side is used to apply torque. The torque meter measures the torque T of the high-speed stage of the test gearbox. 高 The calibration device of the torque measurement system can realize the accurate calibration of the torque measurement system and ensure the accuracy of the calibration result.

The present invention relates to the technical field of image processing, and discloses an auxiliary positioning system based on computer vision recognition and image processing. The auxiliary positioning system based on computer vision recognition and image processing achieves dual improvement of positioning accuracy and stability through multi-source data acquisition, intelligent data processing, precise calibration and dynamic adjustment. Through comparative analysis of calibration coefficient BSX and multi-level thresholds, it can adapt to complex environmental changes more flexibly. The combination of such adaptability and precise calibration makes the performance of the system more robust and reliable in outdoor and dynamic scenes, thereby significantly improving the accuracy of positioning and recognition and the overall efficiency of the system. A modular calculation method is used to process and calculate different types of data separately, which can avoid data confusion and ensure the accuracy of processing various types of data.