10results about How to "High engineering value" patented technology

The invention belongs to the technical field of computer vision, provides a real-time semantic perception system running on equipment, performs real-time instance segmentation and semantic mapping on a working environment, and provides a perception method based on lightweight real-time instance segmentation and semantic mapping. In the first part, firstly, a color image containing color and texture information is used for object classification and bounding box regression; cutting the original depth image into a depth image with an accurate geometric edge, and inputting the depth image into the truncation network to generate a mask of the instance; a second part: (1) calculating the attitude and size of a target object in the view of the camera through principal component analysis; (2) obtaining the category of the object in the view obtained by segmentation; (3) creating a point cloud of the depth image projection of the target object in a map; and then cross-frame tracking and fusion are carried out by using data association to realize the purpose of sensing. The method is mainly applied to automatic sensing occasions.

The invention discloses an experiment table and an experiment method capable of identifying cavitation of a vane pump, and belongs to the technical field of vane pump cavitation characteristic identification experiments. The experiment table comprises a test pump to be tested, a flowmeter, a loudspeaker, a flow adjusting valve and six pressure sensors; the flow meter is arranged on a water outlet pipeline of a to-be-tested test pump and is used for measuring the flow of the water outlet pipeline of the pump; the loudspeaker is arranged on a water inlet pipeline of a test pump to be tested, and when the loudspeaker serves as an external sound source, the loudspeaker can radiate sound pressure waves with different acoustic loads into the water inlet pipeline by adjusting the frequency and strength of the acoustic loads of the loudspeaker. The flow regulating valve is arranged on a water outlet pipeline of the test pump to be tested and is used for regulating the flow of the pump system; the six pressure sensors are data acquisition elements for monitoring cavitation noise of the to-be-tested test pump, and three pressure sensors are respectively arranged on a water inlet pipeline and a water outlet pipeline of the to-be-tested test pump and are used for monitoring sound pressure signals.

A composite anti-lock braking intelligent control method based on real-time estimation of turning angle relates to the technical field of vehicle braking control, and comprises the following steps: step 1, obtaining a vehicle ABS wheel speed signal and vehicle basic parameter information; step 2, estimating the vehicle turning angle θ in real time based on the Ackerman steering principle and a two-degree-of-freedom vehicle model, and identifying the vehicle turning condition; step 3, calculating the vehicle slip rate in real time; step 4, setting the activation condition of the composite anti-lock braking control strategy according to the vehicle slip rate and the relative wheel speed of the rear wheels, if the vehicle slip rate and the relative wheel speed of the rear wheels both meet the activation condition, then executing the composite anti-lock braking control strategy, otherwise executing the conventional driving braking control strategy. The present invention can estimate the vehicle turning angle in real time according to the acquired vehicle ABS wheel speed signal and vehicle basic parameter information, and accurately identify the vehicle turning condition, thereby providing accurate data support for the calculation of the vehicle slip rate.

The present invention discloses a split electric cab for an excavator, which is installed on the top of the excavator, and the cab comprises: a first cab, which is fixedly connected to the top of the excavator; a second cab, which is arranged on the top of the first cab, and the second cab and the first cab together form a complete cab; a connecting member, which is arranged between the first cab and the second cab, and the connecting member comprises: a first connecting part, which is fixedly connected to the first cab, and the first connecting part is supported and connected to the second cab on a side away from the first cab; a second connecting part, which is connected to the end of the first connecting part, and the second connecting part extends out of the top space of the first cab; wherein the second cab can be moved from the first connecting part to the second connecting part, so that the second cab is separated from the first cab, and after separation, the overall height of the excavator will be reduced so that it can pass through a construction cave that exceeds the height of the excavator body, and can be widely used in the field of engineering machinery cabs.

The invention provides a method and system for counting the attendance number of students in daily teaching, and relates to the field of image processing, and the method comprises the steps: collecting continuous multi-frame images of a multimedia classroom based on camera equipment equipped in the multimedia classroom; for each frame of image of the multimedia classroom, obtaining corresponding illumination sensing information, performing adaptive illumination normalization processing, generating an image after brightness processing, generating an improved image through a resolution adjustment model, identifying target human bodies and feature vectors through a target detection model, and allocating a unique identifier for each target human body; for each target human body, identifying an effective target human body based on the feature vector of the target human body in the continuous multi-frame image of the multimedia classroom; and generating a student attendance counting result based on the effective unique identifier of the target human body, so that the method has the advantages of counting the attendance condition of the students based on the camera equipment equipped in the existing multimedia classroom and reducing the education management cost.

The present application provides an aircraft multi-control surface coordinated control management system, including: an instruction preliminary allocation module, a reconstruction instruction generation module, a control efficiency conversion module, a polarity processing module, a control surface deviation limit and priority determination module, and an instruction redistribution module. The aircraft multi-control surface coordinated control management system and method provided by the present application can realize the coordinated scheduling, instruction conversion, fault reconstruction, deviation limit protection and other functions of multiple groups of functional redundant control surfaces in different flight phases, fully exert the aerodynamic redundancy of the aircraft, ensure flight safety, and is compatible with traditional control law design methods. It has strong applicability and versatility and high engineering value.

A radar image difference recognition method based on scattering center modeling and deep learning is proposed. This method utilizes a Gaussian scattering center model to parametrically model the target scattering source, extracting features such as position, amplitude, width, and direction. An automatic thresholding method based on mutual information is employed for image registration. Optimal rigid body transformation parameters are obtained through cross-threshold search and derivative-free optimization, effectively eliminating geometric errors caused by imaging offset. A difference map is generated using a logarithmic ratio operator, and high-confidence pseudo-label samples are obtained through hierarchical fuzzy C-means clustering. Simultaneously, virtual sample generation technology is combined to expand the training set. Finally, a wavelet-constrained convolutional neural network is constructed, incorporating dual-tree complex wavelet transform to enhance direction sensitivity, achieving accurate classification and diagnosis of scattering source changes. This invention significantly improves radar image registration accuracy, change detection robustness, and model generalization ability, making it suitable for applications such as stealth target performance evaluation, radar image detection, and target recognition.

The present application relates to single point load dynamic distribution technical field, specifically, it is a kind of inner rotating tower pontoon type single point load dynamic distribution design method.It includes the following steps: S1, in SESAM software HydroD module, according to the FPSO hull lines, establish wet surface model, according to the FPSO loading information, establish quality model, based on wet surface model and quality model, water dynamic analysis is obtained FPSO overall motion response operator RAO;S2, in Orcaflex software, according to the wind flow coefficient of FPSO, mooring cable parameter, mooring arrangement and key control working condition, establish mooring model, simultaneously, motion response operator RAO is imported, carry out full coupling mooring time domain analysis and obtain dynamic data.The present application design fully considers the releasable characteristics of inner rotating tower pontoon and ship body, carries out systematic stress analysis to multiple coupling structures, the force on mooring connecting piece is decomposed along transmission path and dynamic balance equation is established, and SESAM and Orcaflex two software are used to carry out water dynamic analysis and mooring time domain analysis respectively.

This application provides a distributed control device and method for hot-plugging multiple active bridge transformer submodules, comprising: a resistor divider circuit electrically connected to a high-frequency AC bus, used to convert the high-frequency AC bus voltage into a 0-5V divided voltage signal; a voltage comparator electrically connected to the output of the resistor divider circuit, comparing the divided voltage signal with a set reference potential and outputting high and low level digital signals; a DSP controller electrically connected to the voltage comparator, which sets a phase qualification flag when the phase difference between the local counter and the zero-phase reference t0 is less than a phase threshold; and a transformer submodule electrically connected to the DSP controller, which controls an AC relay to close to connect to the high-frequency AC bus when it receives the phase qualification flag from the DSP controller. This invention addresses the problems of related technologies that often employ centralized control, over-reliance on a central controller, and limitations in computing power and flexibility, especially as the number of modules increases.

The invention discloses a self-adaptive differential protection method and system for a new energy grid-connected line, and the method comprises the steps: obtaining a system side voltage and a system side current at a system side protection installation part of the grid-connected line, and a new energy side voltage and a new energy side current at a new energy side protection installation part; calculating a phase voltage change value and a phase current change value at two sides of the line; when a preset protection starting criterion is met, starting three-phase protection of the line; after protection is started, the amplitudes and phases of current power frequency components on the two sides of the grid-connected line are calculated respectively, and the amplitude and phase information of current on the opposite side is obtained; calculating the amplitude ratio of the current on the two sides of the line, and constructing a phase compensation function and an amplitude compensation function based on the amplitude ratio; calculating the phase difference between the currents on the two sides of the line, performing compensation based on the phase difference, the phase compensation function and the amplitude compensation function, and determining a system side compensation current and a new energy side compensation current; and based on the system side compensation current and the new energy side compensation current, identifying internal and external faults of the line region.