43 results about "Matlab language" patented technology

The invention discloses a fault diagnosis method based on multi-sensor signal analysis. Pressure, temperature, flow and other parameters of a heat pump unit in the operation process are acquired by utilizing multiple sensors, and vibration signals of the unit are acquired by utilizing a vibration sensor so that the equipment state of the air source heat pump unit can be comprehensively mastered. Multiple intelligent technical methods are combined on the basis, and respective advantages of the intelligent technologies are comprehensively applied to perform state monitoring, fault diagnosis and intelligent indication on the air source heat pump unit through enhancing advantages and avoiding disadvantages so that sensitivity and accuracy of a monitoring and diagnosis system can be effectively enhanced and misdiagnosis rate and missed diagnosis rate can be reduced. Meanwhile, a use-facilitating signal processing platform is designed by adopting a GUI design method based on the MATLAB language. An accurate diagnosis decision is provided for general operation personnel without understanding system mechanism or analyzing data.

The invention relates to an embedded plant light environment regulation system combining an illumination frequency and a duty ratio. The system is based on plant physiology characteristics, and obtains the growth state of the plants in real time through a camera, thereby calling the optimal regulation model of the growth stage corresponding to the growth state according to the current state of theplants, and adjusting the illumination frequency to performing supplemental lighting on the plants to achieve the purpose of further improving supplemental lighting efficiency. Firstly obtaining a large amount of experimental data, and writing a support vector machine (SVM) algorithm by using a matlab language after normalization processing to construct a prediction model of the photosynthesis rate of the plants in different environments. Then writing a genetic algorithm by using the matlab language according to the obtained prediction model to construct a supplemental lighting target value optimization model and obtain the light environment target value corresponding to the curvature maximum value of each data. And finally, writing a random forest algorithm by using a python language toconstruct a facility light environment optimization regulation model capable of being portable to an embedded device. According to the embedded facility light environment optimization regulation system combining the illumination frequency and the duty ratio, the plant photosynthesis efficiency can be effectively improved, so that the economic benefit of the facility agriculture is improved.

A method for unify control of corrosion electric drive of reinforced concrete structure belongs to that technical field of civil engineering. The method is as follows: according to the driving force of particle field evolution in concrete under unified electric field, Nernst-Planck equation; the thermodynamic model of interaction between pore solution and hydration product, Poisson equation of electric field distribution and Richards equation of water transport in concrete during particle field evolution are coupled into Nernst-Planck equation; Electrode Dynamics Response of Steel-Mixture Interface under Electric Field Considering Electric Drive and Unified Corrosion Control; thus, the basic theoretical model of unified corrosion control of reinforced concrete structure driven by electricity is formed. Based on MATLAB language, the numerical model is solved by operator splitting algorithm. In the numerical results, the distribution of water content, ionic concentration of pore solution, hydration product content and local current density on the surface of steel bar can be obtained, which provides scientific basis for corrosion control of reinforced concrete structures.

The invention discloses an intelligent image counting method of rock grain sizes after blasting. The method comprises the steps of: A, using a camera to obtain a two-dimensional picture of a rock muckpile after blasting at a blasting site; B, importing the initial grain size picture into the computer, and using image processing software to carry out correction optimization processing on the photograph; C, substituting the processed image into a third-generation neural-network model, which is written on the basis of a matlab language and is namely a feedback-type pulse-coupled neural-network model, for processing; D, additionally carrying out gradient processing on the image, of which preprocessing is completed, to obtain a gradient image; E, substituting the obtained rock grain size markimage and the gradient image into a mark watershed-segmentation method to obtain a grain size segmentation graph; and F, carrying out counting of sizes and the number of block bodies in the two-dimensional picture, drawing a blasting block degree distribution curve, and completing rock block degree counting. Operations are simple and convenient, intelligent image processing realizes rock grain size counting after blasting, and obtained block degree counting data have higher accuracy as compared with data of existing processing technology.

The invention relates to a calculation method of discharge platform of mixed anode material of lithium battery. Wherein, it comprises: obtaining the discharge test data of single anode material, fitting the test data into discharge curvature as voltage-specific capacity function and store it in computer to form one standard test database; selecting the function relationship of mixed used anode material from the standard database, adding the function relationships linearly to obtain mixed material function relationship; at least, using Matlab language to program the method to realize computer simulation. The invention has simple operation and can detect the mixed ratio of unknown mixed anode material.

The invention discloses an electromagnetic relay closing bounce electrical contact mechanical property calculation method under a capacitive load, and the method comprises the following steps: (1), carrying out the formulated description of an action process, and building an electromagnetic force mathematic model, a contact force mathematic model and an electric repulsion mathematic model of an electromagnetic relay; and (2) compiling a calculation program by adopting MATLAB language to realize coupling solution of the electromagnetic force mathematical model, the electric repulsion mathematical model and the contact force mathematical model. In the coupling solving process, contact bounce and dynamic characteristics of the electromagnetic relay under the capacitive load are analyzed basedon a four-order Runge-Kutta method. The invention provides the analysis method for solving and analyzing the bounce characteristics of the electromagnetic relay, an electromagnetic field and mechanical field coupling equation for controlling the contact bounce behavior of the electromagnetic relay can be solved at the same time, the universality is extremely high, the method can be applied to different relays under various working conditions, and the analysis efficiency of the bounce characteristics of the electromagnetic relay is further improved.

The invention provides a drainage pipe network GIS abnormal data detection and restoration method. The method comprises the following steps: firstly, preprocessing drainage pipe network GIS data; writing query and repair rules in an ArcGIS ''topology'' tool box and SQL Server database software to process topology exceptions; constructing an attribute item semi-automatic classification method basedon a Jaccard similarity coefficient matrix to classify and repair text attribute items of the drainage pipe network; an upstream and downstream pipe diameter filling method based on rules is providedfor abnormal pipe diameter detection and repair; and based on the least square method, the detection and repair of the abnormal pipe section elevation and the abnormal inspection well elevation at the multi-pass node are realized. Based on the method, a MATLAB language is adopted to develop a corresponding program, man-machine interaction type drainage network abnormal data detection and restoration are achieved, the method has certain universality to solve various main data abnormal problems of the drainage network, and the data quality of the drainage network can be effectively helped to beimproved.

The invention discloses an aging evaluation method for the superconducting insulating materials based on a composite electric field. On the basis of a cumulative damage method, the insulation state ofan insulating material for a high-temperature superconducting direct-current cable is evaluated effectively. The method comprises: preparing an epoxy resin test sample based on pin-plate electrode; carrying out experiment by using an electric branch experiment system device in a low temperature environment; observing the aging condition of the sample electric branch under an electric branch observation device; and then carrying out calculation by using the Matlab language. Therefore, the aging evaluation of the superconducting insulation material under the composite electric field is realized; a problem of the electric tree branch aging of the insulating material due to continuous increasing of the transmission capacity of the power grid, continuous improvement of the voltage level and the complication of the external environment is solved; and the safe and stable operation of the power system is guaranteed effectively.

The invention records an inner mass transfer computing method of concrete under environment and material physical and chemical intrinsic action. The method specifically comprises the following steps:S1, coupling a thermodynamic model of physical and chemical intrinsic action between a porous solution of a cement-based material and a hydration product to a Nernst-Planck equation considering waterconvection action; S2, transferring PHREEQC to calculate the thermodynamic model between the porous solution and the hydration product through an MATLAB language and calculate Nernst-Planck equation and the water convection action by COMSOL, and achieving interaction therebetween; and S3, representing hydration products of water, porous solution ion concentration and hydration product content in the cement-based material according to the calculation result. The method belongs to the field of civil engineering materials. The numerical value model can provide the most intuitive theoretical ground for durability design of the cement-based material and prediction of service life of a reinforced concrete structure.

The invention relates to a radar anti-collision driving system. The system is characterized in that: two sides of the front part of an automobile are provided with anti-side collision laser range finders; the front part is also provided with sonar horns; a sonar transducer is connected with the back of the sonar horns; the sonar transducer is connected with a syndrome all-weather automobile signal processor through an amplifier and a diode detector; a thermal infrared imager is arranged in the front of a cab; a digital signal processor TMS 320240 is adopted in hardware of a driving expert control system and the hardware integrates high-speed signal processing capacity of a DSP and a peripheral circuit suitable for motor control into a whole to directly control speed reduction, steering and braking of the automobile; and a driving expert system adopts an artificial intelligent forward inference engine program and programs by using an artificial intelligent language, namely an LISP language or a MATLAB language. The all-weather automobile radar anti-collision driving system can realize all-weather precise measurement and positioning of targets in front of the automobile, and automatically adjust speed, steering, and braking to fulfill the aim of safe driving.

The invention relates to a method for designing a satellite-borne SAR internal calibration data processing flow in the technical field of satellite-borne SAR internal calibration data processing. Themethod comprises the following steps: (1) according to the satellite-borne SAR integration testing internal calibration data processing flow, function modules are divided; (2) input and output parameters of the function modules are defined on the basis of the division of the function modules, and data interaction among the function modules is realized; (3) the function modules are developed basedon a MATLAB language function form, and meanwhile standardized packaging is carried out; and (4) the development of the internal calibration data processing flow is completed on the basis of the standardized function modules which have been developed. According to the method, the problem in designing the internal calibration data processing flow during satellite-borne SAR integration testing or ground application processing based on the standardized function modules is emphatically solved; the problem in data interaction is solved; and the requirements of efficient automatic processing are met.

The invention discloses a high-temperature aging estimation device for a DC cable insulating material based on a composite field, and the device mainly consists of an experiment apparatus, an electrical tree observation apparatus, a DC superposition pulsed power supply apparatus and a terminal. The interior of the terminal is provided with a Matlab language data analysis platform, and the electrical tree observation apparatus records the test sample change data in the experiment apparatus, and transmits the data to the terminal. The device effectively simulates the working conditions of a DC cable in actual operation.

The invention discloses a bird risk prediction and evaluation method in an aero-engine bird-attracting environment. The method comprises steps of obtaining the probability of an aero-engine bird-attracting event according to historical data, writing an M file program through employing MATLAB language, achieving a BP neural network algorithm, predicting the economic loss caused by the aero-engine bird-attracting event through employing a BP neural network model, and obtaining the bird-attracting risk of an aero-engine; risk assessment being carried out in combination with the aircraft engine bird suction event probability and the risk assessment matrix; and finally, designing a GUI (Graphical User Interface), selecting eight factor data such as aircraft mass, engine installation number, engine type, month, weather, bird type, bird number and bird size in the statistical data according to the correlation degree of influence factors in the aircraft engine bird attraction event, and calling a BP (Back Propagation) neural network algorithm through an M file to obtain a result. The method is advantaged in that the model can be used for predicting the probability value, the severity degree and the risk assessment level of a certain bird inhaled by a certain engine of a certain flight aircraft in a specified time period and a specified height in the future.

A regional comprehensive energy system configuration optimization method based on photovoltaic consumption comprises the steps that a regional comprehensive energy system basic framework based on photovoltaic consumption is established according to regional electricity, cold and heat load requirements; constructing a regional comprehensive energy system capacity configuration optimization model bytaking the highest economy, the highest system energy supply reliability and the lowest light abandoning rate of the system as target functions; power generation strategies are set to be photovoltaicpower generation, a combined cooling heating and power supply unit, an energy storage unit and an external large power grid energy supply unit in sequence; mATLAB language programming is used for realizing regional comprehensive energy system configuration optimization, optimal capacity configuration, namely the configuration number of all units, is obtained, and configuration power is obtained through calculation; meanwhile, annual operation results which comprises system energy supply composition, photovoltaic consumption conditions and energy supply interruption conditions are output. According to the method, the purpose of effectively promoting photovoltaic consumption on the basis of ensuring the energy supply reliability can be achieved, and the photovoltaic utilization rate and theoptimization efficiency of regional comprehensive energy are effectively improved.

The invention relates to the field of geophysical exploration, and discloses a field point lofting method for geophysical exploration, which is characterized in that a lofting reference point is determined in a lofting area, and then field point lofting is carried out through a recursion method. According to the method, any lofting angle can be selected for the point orientation and the line orientation of field geophysical exploration; the situation that single-line lofting is easily interfered by factors such as field rivers, lakes and villages is avoided, and multi-line lofting in the area can be carried out at the same time; according to the method, a related operation interface can be developed based on a Matlab language, man-machine interaction can be realized, and lofting parameters can be changed according to requirements.

The invention discloses a composite-electric-field-based superconducting insulation material aging evaluation device, which is mainly composed of an experimental device, an electric branch observationdevice, a DC superimposed pulse voltage device and a terminal. A Matlab language data analysis platform is arranged in the terminal. The electric branch observation device observes and records samplechange data in the experimental device and transmits the data to the terminal; and then the Matlab language data analysis platform arranged in the terminal performs analysis and evaluation. Therefore, the aging evaluation of the superconducting insulation material under the composite electric field is realized; a problem of the electric tree branch aging of the insulating material due to continuous increasing of the transmission capacity of the power grid, continuous improvement of the voltage level and the complication of the external environment is solved; and the safe and stable operationof the power system is guaranteed effectively.

The invention provides a MATLAB (Matrix Laboratory) real-time simulation method, which comprises the following steps: firstly, providing a script execution engine running on an embedded real-time operating system and used for executing and loading a user algorithm model script in an MATLAB language form; wherein the embedded real-time operating system runs on the embedded hardware platform; realizing a user algorithm model script, wherein the user algorithm model script is an algorithm model realized by a user through MATLAB language; the system comprises three modules, namely an initialization module Initialize, an operation module Step of each step length and an end module Finalize. The script execution engine firstly executes an initialization module Initialize and then starts a timer,sets the timing length to be a step, and executes an operation module Step in callback of the timer. The C/C + + code is generated without a code generation technology and directly runs on an embeddedhardware platform, so that the burden of designers is reduced. The working efficiency is improved.