32results about How to "Quick fetch" patented technology

The invention provides a high-speed moving target position and posture measurement method based on coding structured light, belongs to the technical field of computer vision measurement, and relates to the large-visual-field and small-target high-speed moving target position and posture measurement method. The method includes the steps of projecting a colored grid line containing coding information to a measured area through a colored projector, continuously shooting structured light coding grid line patterns, deformed through moving object surface modulation, through a high-speed camera, achieving corresponding point matching of an imaging plane and a projection plane after digital image decoding to obtain phase position change information, reversely calculating the three-dimensional dynamic morphology of a high-speed moving object through system structure parameters, matching the measured point with a prior model established on the basis of to-be-measured geometrical parameters, and finally accurately measuring position and posture information of the high-speed moving object. The purpose of matching in stereoscopic vision is effectively achieved through a colored stripe pseudorandom sequence and gray scale grid line phase position combined mode. A measurement system is low in cost, simple in mechanism and easy to operate.

The invention discloses a high-velocity motion object pose vision measurement method based on structured light, belongs to the technical field of computer vision measurement, and relates to a large-view-field small-target high-velocity motion space pose measurement method. The measurement method comprises the following steps: shooting auxiliary crossed laser by left and right high-speed cameras by adopting vertical laser strips and auxiliary crossed laser, recognizing crossed points, and recording the imaging positions of the auxiliary crossed laser at left and right high-speed cameras respectively; and collecting images of a measured cylinder and the vertical laser stripes by utilizing left and right high-speed cameras, transmitting the collected images to a diaphragm workstation, binding and optimizing a target axis by utilizing the distance from the deformation parts of the laser stripes generated by the measured cylinder to the axis, thereby obtaining the position and pose information of the target object finally. According to the invention, the pose information of high-speed motion target objects with high precision without any treatment by utilizing the laser stripes can be obtained, the image collecting quality is improved, and the influence by noisy points is prevented effectively.

The invention provides a camera lens mechanism, a camera lens cover and a camera lens set with the camera lens mechanism and the camera lens cover. The camera lens cover selectively covers the camera lens mechanism. The camera lens mechanism comprises a shell body and a sleeve cone. The shell body is provided with a first angle guide face, and the extending face of the first angle guide face obliquely crosses with an optical axis. The sleeve cone is arranged in the shell body. The camera lens cover comprises a base and a movable piece, the movable piece is movably arranged on the base relative to the base in the radial direction and is provided with a second angle guide face, and the extending face of the second angle guide face obliquely crosses with the optical axis. When the camera lens cover covers the camera lens mechanism, the second angle guide face abuts against the first angle guide face. Due to the fact that the geometric outline of the first angle guide face is matched with that of the second angle guide face, the contact area of the first angle guide face and the second angle guide face is enlarged. In the process of pushing the base in the direction of the optical axis through the sleeve cone, the second angle guide face is separated from the first angle guide face in the radial direction and the direction of the optical axis.

The invention relates to an elliptical arc interpolation algorithm. After determining the starting point, the end point, the major semi-axis, the minor semi-axis, the big and small arc marks, the clockwise and counterclockwise direction marks, and the inclination angle, any elliptical arc can be drawn according to the method. . According to step 1, step 2 and step 3 of the method, the coordinates of the center point of the ellipse can be obtained from any ellipse arc determined by the above parameters, and it is easy to write a computer program to realize. In step 4 and step 5 of the method, an elliptic arc interpolation algorithm for setting step angles based on the maximum bow height error within the allowable range is proposed. By using this method, the coordinates of elliptic arc interpolation points can be obtained quickly and efficiently.

The invention provides a rapid calculation method for a radar terrain shielding blind area under multiple heights. The method comprises the steps of setting parameter information of a radar, and sorting a plurality of defense penetration flight heights needing to be calculated; using a binary search method and an adjacent greedy method to calculate detection ranges of the radar under a minimum height layer and a maximum height layer of aircraft flight; taking the detection ranges of the radar under the minimum height layer and the maximum height layer as a minimum detection range and a maximumdetection range of a second minimum height layer, calculating the radar detection range of the second minimum height layer in the interval, and taking the calculation result as the minimum detectionrange in the next calculation; and calculating radar detection ranges of all heights, obtaining radar terrain shielding blind areas under multiple heights, and coloring and displaying calculated results. According to the method, the calculation amount can be effectively reduced, and the radar terrain shielding blind areas under the multiple heights can be quickly solved.

The invention relates to a polarizing plate axial measuring device and a measuring method. The measuring device can provide a polarizing plate to be measured, and comprises a light supply device, a polarizing device and a measuring comparing device. The light supply device can provide a light supply. The polarizing device is arranged corresponding to the light supply device and can bear the polarizing plate to be measured, and also can measure a light signal obtained after the measuring light supply passes through the polarizing plate without need to turn the polarizing plate to be measured and convert the signal into data which can be read and judged. The measuring comparing device is connected with the polarizing device through telecommunication, and at least presets a comparing data, and can receive the data provided by the polarizing device so as to make data comparison with the comparing data. Therefore, the axial deflexion angle of the polarizing plate to be measured can be quickly and accurately measured and calculated in virtue of the data provided by the polarizing device and the comparison between the data and the comparing data.

The invention relates to a device for obtaining the width of a Moire fringe by using an image processing technology. The device comprises a device for acquiring an image of the Moire fringe, a device for obtaining the direction of the Moire fringe and a device for calculating the width of the Moire fringe, wherein the device for obtaining the direction of the Moire fringe defines a group of straight lines aj which are intersected into the same point on the image of the Moire fringe, obtains image gray value root mean square errors sigma j in the direction of the straight lines alpha j by using pixel values xij of each point on the image of the Moire fringe at positions where the straight lines aj pass, and uses a straight line au which corresponds to the minimum image gray value root meansquare error sigma u in the sigma j as the direction of the Moire fringe. According to gray values of pixel points on the image of the Moire fringe which is acquired by a computer, the device provided by the invention automatically identifies a direction angle of the Moire fringe, calculates the width of the Moire fringe, is high in calculation speed and high in accuracy, and can be widely applied to the fields of small-angle accurate measurement, photoelectric displacement accurate measurement and the like.

The invention relates to the technical field of power system automation, and aims to provide a transient stability prevention and control method for a power system embedded with a deep belief network.The method comprises the following steps: S1, determining an active output fluctuation range and a load fluctuation range of a generator, generating N generator active output samples, obtaining a large amount of initial state data, and performing time domain simulation calculation on the initial state data to generate sample data; S2, establishing the deep belief network, training the deep beliefnetwork by using the sample data, and fitting the active power output of the generator and the transient stability of the system to generate a transient stability evaluator of the power system; S3, adding a cost constraint, a power flow constraint and a stable operation constraint to the NSGA-II algorithm based on a transient stability constraint condition, and building an NSGA-II evolutionary algorithm model; and S4, obtaining a generator output fluctuation range and a load fluctuation range of transient instability under a fault, performing iterative optimization on the NSGA-II evolutionaryalgorithm model and solving a prevention and control strategy.

The invention provides a 360-degree cylindrical real-time imaging device. The 360-degree cylindrical real-time imaging device comprises a wide-angle camera shooting device, a lens set, an optical sensor and a signal processor. The wide-angle camera shooting device is provided with a camera lens, the camera shooting angle of the camera lens at least can form a 360-degree ring, and the ring has a certain width. The structural shape of the camera lens is slightly similar to a hemisphere, and the section radian of the camera lens is larger than 180 degrees. The lens set is used for obtaining appropriate parallel light. The optical sensor receives light from the lens set, converts the light into current intensity of different pixel points on the plane and converts the current intensity into digital signals. The signal processor is connected with an internal storage, reads shot 360-degree cylindrical images in the internal storage and corrects the 360-degree cylindrical images respectively so that the images which are originally distorted by the camera lens can be restored into images approaching solids. One 360-degree cylindrical image can be obtained through processing and is just like an image viewed by a viewer who stands at the center point of the camera lens and rotates by 360 degrees.

The invention discloses an extension rod capable of fast pulling and loosing a sleeve, belonging to the technical field of extension rods. The extension rod comprises a rod body, a first elastic piece, a clamping rod, a second elastic piece and an external member. The user can hold the rod body by one hand, and place the sleeve around a bearing section of the rod body by the other hand, so as to enable the extension rod to pull the sleeve fast; or the user can hold the rod body by one hand, then hold and move the external member by the other hand, so as to enable the extension rod to loose the sleeve fast.

A method for determining the direction calibration parameters of a surgical instrument and a method for determining the action direction of the calibration tool and the surgical instrument. The method for determining the direction calibration parameters includes: placing the measured object (40) with the tracking marker (21) on the calibration tool (30), keeping its direction constant and rotating, and determining at least Two three-dimensional rotation matrices, using the three-dimensional rotation matrix to obtain the direction calibration parameters through the two-point relationship formula or the linear direction rotation formula in the three-dimensional space. Based on the obtained direction calibration parameters and the current three-dimensional rotation matrix of the tracking marker, the current action direction of the surgical instrument is determined. This method does not need to place the measured object in a known direction, and does not need to determine two points in the direction to obtain the direction calibration parameters of the surgical instrument, so as to determine the role of the surgical instrument in actual use. Direction provides doctors with reliable direction information to ensure the smooth progress of the operation and improve the accuracy of the operation.

The invention discloses a cloud big data database quick index establishment system, which is electrically connected with a non-relational database deployed at the cloud, is used for inquiring and establishing indexes. The system comprises an application exchange module, a data exchange module, a first processing module, a second processing module and an integration processing module. The application exchange module receives a query character string input by a user and prompts a result index table. A temporary storage index table is stored in the data exchange module. The first processing module calculates a query character string and generates a query instruction to calculate a temporary index table for comparing whether the temporary index table has data conforming to the query instruction. If yes, the first processing module generates a cache index table. If not, the first module generates an establishment instruction for the second processing module to calculate the non-relational database and generate a new index table. The integration processing module calculates a cache index table and a new index table to generate a result index table. Therefore, the index establishing efficiency is greatly improved.

The invention discloses a method for calculating the oil content of oil shale, which comprises the following steps of obtaining the percentage contents of an S element and an Al element in an oil shale sample based on the oil shale sample; based on oil shale oil content data measured in a laboratory of an oil shale mining area where the oil shale sample is located, obtaining a calculation coefficient through multivariate regression analysis, and establishing an oil shale oil content regression equation M = a + bCS + cCAL, wherein M is the oil content of the oil shale, Cs and CAL are the percentage contents of an S element and an Al element respectively, and a, b and c are calculation coefficients; and obtaining the oil content of the oil shale based on the percentage contents of the S element and the Al element and the oil content regression equation of the oil shale. According to the method provided by the invention, the oil content of the oil shale can be quickly calculated through the obtained percentage contents of the S element and the Al element and the oil content regression equation of the oil shale.