6results about How to "Continuous positioning" patented technology

The invention is suitable for the technical field of aircraft navigation, and provides a radio and vision combined low-altitude multi-mode navigation method and system, and the method comprises the steps: constructing a grid navigation reference network which continuously covers a target area; the fusion navigation beacons continuously broadcast radio broadcast information containing absolute coordinates and identity information of the communication signal towers where the fusion navigation beacons are located outwards; and when the satellite navigation positioning information is unavailable, the aircraft performs preliminary positioning based on the received at least one piece of radio broadcast information, and flies to the site of the fused navigation beacon broadcasting the radio broadcast information. According to the invention, the existing communication signal tower infrastructure is multiplexed to construct the gridding navigation reference network, and when the aircraft is in a complex environment which causes attenuation or failure of satellite navigation signals, the aircraft can be seamlessly switched to radio and visual navigation signals provided by signal tower beacons; the problems of coverage blind areas and monitoring interruption caused by excessive dependence on a single satellite navigation signal are effectively solved.

The invention relates to the technical field of safety monitoring and evaluation of oil and gas storage and transportation facilities, in particular to a buried pipeline stress inversion and correction method based on mode matching, which comprises the following steps of: firstly, stripping a temperature and pressure load to construct a pipeline reference internal force model; all-line internal force deduction is achieved with pattern matching as constraint, all-line real stress fields are obtained through superposition and correction, risk identification is completed, all the steps are progressive layer by layer and are linked with one another, the previous step provides data basis and technical support for the next step, the next step iterates and applies the result of the previous step, and the risk identification accuracy is improved. According to the method, a complete technical closed loop from model construction, single-point inversion, whole-line deduction, stress correction and risk identification is formed, physical decoupling of the internal force under different loads is realized, a foundation is laid for accurate analysis of the additional stress of the earth surface displacement, and the accuracy of inversion of the internal force component of the earth surface displacement is greatly improved.

The utility model relates to the technical field of pcb bonding pad welding, in particular to a pcb bonding pad welding auxiliary device which comprises an installation frame, a servo motor and an electric push rod, the servo motor and the electric push rod are fixedly installed on the two sides of the installation frame respectively, and a first clamping frame and a second clamping frame are arranged on output shafts of the servo motor and the electric push rod respectively. The inner side of the first clamping frame and the inner side of the second clamping frame are each provided with an elastic clamping module, the positioning module comprises I-shaped sliding blocks arranged on the first clamping frame and the second clamping frame, according to the pcb bonding pad welding auxiliary device, when a pressing plate is pressed to move downwards, ratchets of a ratchet bar are interfered by an interference strip, shrinkage deformation can happen, and therefore the positioning module can be used for positioning the pcb bonding pad. When ratchets of the ratchet bar cross the interference bar, the pressing plate can be reset, when the pressing plate stops moving, the pressing plate can be reset under the action of the reset spring, but at the moment, the ratchet bar can be interfered by the interference bar to prevent the ratchet bar from being reset, so that the purpose of self-locking is achieved, and the component is continuously positioned.

This invention relates to a multi-dimensional confidence-based point-line fusion SLAM method and system for visually degraded environments, belonging to the fields of computer vision and robot navigation technology. The invention constructs a nonlinear mapping function based on two-dimensional image entropy, dynamically adjusts the gradient threshold and Gaussian smoothing parameters of the line feature extraction algorithm, and introduces a sudden illumination safety mode to enhance adaptability to extreme environments. It performs photometric consistency verification on point features after optical flow tracking, performs region growing on line features using the aforementioned adaptive parameters, and proposes a hierarchical non-convex relaxation algorithm guided by dual weights of geometric residuals and pixel gradients for noise-resistant fitting. It establishes a linear inverse mapping mechanism between front-end feature confidence and back-end optimization information matrix, dynamically adjusting residual weights according to feature quality. In motion-blurred and illumination-changing environments, it can effectively extract high-quality features and perform tight-coupling optimization, improving the positioning accuracy and speed of the SLAM system in weak-texture and drastically changing illumination environments.

The application discloses a kind of robot motion intelligent control method and system based on machine vision, it is related to robot motion intelligent control technical field, by visual image acquisition processing module and ground texture detail extraction module, can make full use of ground crack, joint seam and special mark and so on texture details, form more stable visual feature base.Compared with the scheme of traditional dependence GPS or IMU, this design can still maintain higher positioning accuracy and stability in the environment of GPS signal loss, IMU drift accumulation is serious, reduce the deviation and misjudgment direction that robot appears in narrow space or repetitive trajectory task.Ground mark matching and feature point screening module not only extracts feature point, but also combines texture direction consistency index to carry out stability screening to feature point, eliminate weak feature point in unstable area, output high confidence ground mark matrix;Make robot can rely on reliable ground mark to carry out continuous self-positioning and trajectory keeping.

The present application relates to the technical field of oil and gas storage and transportation facility safety monitoring and evaluation, in particular to a buried pipeline stress inversion and correction method based on pattern matching, which first peels off temperature and pressure load to construct a pipeline reference internal force model, then inverses the internal force component of the monitoring section surface displacement through multi-source measured data, then realizes the whole line internal force deduction with pattern matching as the constraint, finally superimposes and corrects to obtain the whole line real stress field and completes risk identification, each step is progressive and interlocking, the previous step provides data basis and technical support for the next step, the next step iterates and applies the results of the previous step, forming a complete technical closed loop from model construction-single point inversion-whole line deduction-stress correction-risk identification, the present application realizes the physical level decoupling of internal force under different loads, lays a foundation for the accurate analysis of surface displacement additional stress, and greatly improves the accuracy of surface displacement internal force component inversion.