64results about How to "Accurately obtain" patented technology

The invention provides a method for acquiring steady-state equivalent wind speed and generated power in wind power station based on correlation analysis, belonging to the technical field of wind powergeneration. The method comprises the following steps: preprocessing the operational data in the wind power station; acquiring the steady-state equivalent wind speed in the wind power station by a correlation analysis method; forming a wind speed matrix, calculating correlated matrix of all unit wind speed in the wind power station, acquiring a characteristic value and a characteristic vector of the correlated matrix to obtain the equivalent wind speed finally; and acquiring the generated power in the wind power station, and the like. The method can accurately acquire the equivalent wind speedand generated power in the wind power station, and has the characteristics of high precision, simple method, convenient operation, and the like. The method has wide application range, and can be usedfor equivalent modeling of the wind power station, confirmation of the maximum penetration power of the wind power station, technique and system for predicating the generated power in the wind powerstation, reliability and economy application of the wind power station, analysis of influence of a wind power access network to the power system, and the like, and has great application value for planning and designing a wind power station access system.

As an embodiment of the present invention, in a navigation system using an acceleration sensor, when position information cannot be obtained from a GPS processing section, a velocity detecting unit performs an operation using detected acceleration αG, a measurement time mt, a velocity V0 at a time t0, gravity acceleration g and an amount of height change Dh, according to Expression (11). By using the relationship among a gravity acceleration component gf, the gravity acceleration g, the amount of height change Dh and distance Dm shown in Expression (4), the gravity acceleration component gf can be offset by the amount of height change Dh. Therefore, velocity V can be calculated with high accuracy without receiving the effect of the gravity acceleration component gf.

To accurately calculate an attached angle of an accelerometer and accurately correct an acceleration that is obtained from the accelerometer: a frequency analyzing module of an acceleration corrector divides a sensor coordinate system acceleration into a bias frequency component, a gravity frequency component, a movement acceleration frequency component, and a noise frequency component, through a wavelet transform. The frequency analyzing module outputs a sum component of the gravity frequency component and the movement acceleration frequency component to an attached angle estimating module and a correcting operation module. The attached angle estimating module estimation-calculates the attached angle of an accelerometer and outputs it to the correcting operation module. The correcting operation module corrects the acceleration, which is including of the sum component of the gravity frequency component and the movement acceleration frequency component, based on the estimation-calculated attached angle to calculate a movable body coordinate system acceleration.

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.

This invention discloses one method to imbed software record edit information, which comprises the following steps: a, defining one edit information whole volume for initiating in software; b, coding the files into executive image file; c, according to file form to analyze the image file to find out the memory position in first step to write the edit information into position; d, converting the corrected file into bin file; e, compressing bin file and compressing the edit file into compression file head; f, decompressing the software edit to get edit information through reading whole volume.

The invention relates to a method and a system for setting a voltage change rate criterion of direct current line travelling wave protection. The method comprises the following steps: carrying out smoothing reactor valve side metalline earth fault simulation in a simulation model of a direct current transmission system, and obtaining a plurality of first current differential voltage values by sampling direct current bus voltage at each interval of scheduled time, so as to obtain an external fault protection characteristic quantity change boundary; carrying out terminal metalline earth fault simulation in the simulation model, and obtaining a plurality of second current differential voltage values by sampling the direct current bus voltage at each interval of scheduled time, so as to obtain an internal fault protection characteristic quantity change boundary; determining a protection setting value according to the external fault protection characteristic quantity change boundary and the internal fault protection characteristic quantity change boundary. By the method, the change boundaries of the protection characteristic quantity in the internal fault and the external fault can be accurately determined, so that the protection setting value can be accurately determined and quantitative evaluation on the protection performance is achieved.

The invention provides a method and a device for analyzing focusing energy of diffracted waves. The method comprises the steps of extracting common offset diffracted wave data from acquired seismic common offset data; acquiring angle gather seismic data according to a seismic wave offset velocity file of the seismic common offset data and the common offset diffracted wave data; extracting a diffracted wave target amplitude value from the angle gather seismic data, and enabling the extracted target amplitude value to act as a diffracted wave energy vector in a diffracted wave energy vector group; calculating a variance value of each diffracted wave energy vector in the diffracted wave energy vector group so as to acquire a plurality of variance values; and searching the maximum variance value in the plurality of variance values, and enabling the maximum variance value to act as target focusing energy. According to the method provided by the invention, the focusing energy of the diffracted waves can be solved accurately, diffracted wave focusing and imaging are realized, and a purpose of accurately positioning small-scale heterogeneous geologic bodies in the underground space is achieved. The method relieves a technical problem of poor accuracy when the focusing energy of the diffracted waves is solved in the prior art.

The invention relates to the technical field of oil and gas field development, and particularly discloses a shale oil and gas reservoir fracture parameter inversion method based on fracturing fluid flowback data, which comprises the following steps: constructing a shale oil and gas reservoir fracture parameter inversion mathematical model and a matrix seepage mathematical model; pseudo-pressure and pseudo-time are introduced, a variable separation method and the Duhamel principle are used for solving the crack parameter inversion mathematical model, and a linear form analytical solution is obtained; solving the matrix seepage mathematical model by using a separation variable method and a Duhamel principle to obtain the matrix-to-crack fluid channeling amount; simultaneously solving the fracture and matrix material balance equation to determine the change relation of the average pressure in the fracture and the matrix along with the time and the change relation of the average saturation along with the time; and performing inversion iteration on the fracture parameters based on the linear form analytical solution, the average pressure and the change relation of the average saturation along with time so as to determine the fracture parameters of the shale oil and gas reservoir. According to the scheme, the fracture parameters of the shale oil and gas reservoir can be accurately and timely solved.

An estimating apparatus includes an acquiring unit, a history recording unit, and a determining unit. The acquiring unit acquires power amounts for respective measurement times from a measuring apparatus that measures power for each branch line, as a plurality of used power amounts. The history recording unit records the plurality of used power amounts in association with dates and times. The determining unit variably sets a comparison value for comparing magnitudes of the plurality of used power amounts recorded in the history recording unit, obtains a minimum value of the comparison value in a range satisfying a condition that an amount of time for which at least some of the plurality of used power amounts are continuously equal to or below the comparison value exceeds a prescribed sustained time, and estimates the minimum value to be a peak value of stand-by power of the branch line.

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 provides a control method, device and equipment for a dopant for mono-crystalline silicon growth and a storage medium. The method comprises the steps: obtaining a current technological parameter after the preparation of current mono-crystalline silicon is completed, inputting the current technological parameter into a preset model, determining a target volatilization proportion of the dopant; obtaining a theoretical residual amount of the dopant after the preparation of the current mono-crystalline silicon is completed; determining the actual residual amount of the dopant according to the theoretical residual amount and the target volatilization proportion; obtaining the theoretical demand of the dopant for the next single crystal silicon growth, and controlling the actual demand of the dopant for the next single crystal silicon growth according to the actual residual amount of the dopant and the theoretical demand of the dopant for the next single crystal silicon growth.According to the embodiment of the invention, by adopting the preset model, the volatilization proportion of the dopant in the process from the completion of pulling of the current mono-crystalline silicon to the next filling can be accurately obtained, so that the amount of the dopant in the next filling can be better controlled, and the resistivity of the grown next mono-crystalline silicon meets the preset requirement.

A photographing apparatus for vehicle includes a control device which is configured to execute either a first processing or a second processing when a specific condition is satisfied until when a predetermined period of time elapses from start time of the predetermined period of time. The specific condition is satisfied when magnitude of a heat generation amount determination factor deviates from magnitude of the heat generation amount determination factor at the start time of the predetermined period of time by a predetermined value or more. The first processing is a processing to stop applying voltage to heating means until when the predetermined period of time elapses. The second processing is a processing to change a voltage application time based on magnitude of the heat generation amount determination factor at the time when the specific condition is satisfied.

In a printed product color misregister amount detection method, a reference register mark including a first color area portion with a predetermined width and a blank portion in contact with the first color area portion is printed in a reference color on a printed product to be printed by a multi-color printing press. A positional shift detection register mark including a second color area portion with a width smaller than that of the first color area portion of the reference register mark is printed in a color other than the reference color to have as a target position a position where the width of the second color area portion falls within the width of the first color area portion of the reference register mark. Density information representing a density of a color component which is of the same color as that of the positional shift detection register mark within a target range including the first color area portion and the blank portion in contact with the first color area portion of the reference register mark where the positional shift detection register mark has been printed is measured. A positional shift amount between the reference color and the color other than the reference color as a color misregister amount is obtained on the basis of the measured density information.

The invention relates to a permanent magnet synchronous motor maximum efficiency torque ratio control method and permanent magnet synchronous motor maximum efficiency torque ratio controller. The method comprises steps of S1, according to the given target torque of the permanent magnet synchronous motor, using an MTPA curve to iteratively obtain the stator d-axis current under the minimum currentoperating point corresponding to the target torque; S2, according to a motor constraint condition, establishing a permanent magnet synchronous motor operating point selection model; and S3, accordingto the target torque of the permanent magnet synchronous motor, the current voltage limiting ellipse and current limiting circle of the permanent magnet synchronous motor, obtaining a new operating point based on the permanent magnet synchronous motor operating point selection model. Compared with a linearization method, the method greatly weakens the voltage constraint condition and obtains better dynamic response, can accurately obtain the intersection of the MTPA curve and the current limiting curve or voltage limiting curve to avoid torque instability or even oscillation caused by a calculation error.

The invention provides a projection mapping method and device. The projection mapping method is applied to control equipment in the projection mapping control system, and the control system further comprises a camera and a projector. The method comprises the following steps: acquiring a grating image, wherein the grating image is an image which is collected by a camera and contains a grating pattern projected by a projector on a to-be-projected object; obtaining a parallax image of the projector based on the grating image; obtaining a discrete color image, wherein the discrete color image is an image obtained after the grating image is transformed, and the discrete color image comprises a hole area; repairing the hole area based on the parallax image to obtain a first repaired image; generating a projection image based on the first restored image and the parallax image; and controlling a projector to project the projection image on a to-be-projected object. The method is used for simplifying the operation process of projection mapping and improving the practicability.

The invention relates to a tracking and computing method of Thevenin equivalent of a full-dynamic process power system and belongs to the field of power system automation. In order to solve the problem that the traditional computing method of Thevenin equivalent can only compute equivalent parameters of steady-state process of the power system, and cannot compute equivalent parameters of the power system during the failure of the power system and transient process after the failure is solved. The method comprises the following steps of: using the equivalent parameters before failure to compute amplitude of equivalent voltage source when the failure occurs; taking the resistive component of the equivalent system impedance before failure and equivalent voltage source amplitude when the failure occurs as original values, computing other Thevenin equivalent parameters when the failure occurs; and finally, using the method to compute equivalent parameters of the power system when the failure is removed so as to obtain Thevenin equivalent parameters of the power system at each time after the failure is removed. The method can compute equivalent parameters during the full-dynamic transient state and medium and long-term process of the power system, and has small computing error.

A shock absorber includes a suspension spring configured to bias the shock absorber main body in an extension direction; a spring bearing that supports one end of the suspension spring; a jack configured to change an axial position of the spring bearing; an adapter rotatably mounted on the spring bearing, the adapter being restricted to move in an axial direction with respect to the spring bearing; a rotation stop member mounted on the shock absorber main body to stop a rotation of the adapter; and a stroke sensor disposed between the adapter and the rotation stop member.

A method for the automated calibration of a printing machine with an image capture system by using a computer, includes putting at least one printed sample substrate with defined deviations into the printing machine, generating a digital image of the printed sample substrate by using the image capture system, calculating current compensation values including defined deviations for configuration parameters of the printing machine relating to optimizing the printing quality by using the computer, and comparing the current compensation values created with target compensation values known from thedefined deviations of the printed sample substrate. Serviceability of the printing machine is checked by evaluating the comparison by the computer and/or calibrating the printing machine by using theevaluated comparison by the computer.

A sensor element includes: a main pump cell constituted by an inner pump electrode facing a first inner space into which a measurement gas is introduced, an external pump electrode provided on an element surface, and a solid electrolyte located therebetween; and a measurement pump cell constituted by the measurement electrode facing a second inner space which is communicated with the first inner space and functioning as a reduction catalyst for NOx, and a solid electrolyte located therebetween. The inner pump electrode has a planar shape in which two parts of a front end part relatively having a large area and a rear end part relatively having a small area are sequentially connected in this order from an upstream side in a longitudinal direction of the sensor element while satisfying requirements of a predetermined size and area.

The present invention relates to a method for determining the circumference of the tyres fitted on a vehicle, in which the circumference of the fitted tyres is estimated within a predetermined tolerance band (TB11, TB21, TB31). In so doing, the tyres which can be fitted on the vehicle are divided into at least two defined classes (K1, K2), each with predetermined circumferential intervals (UK1, UK2), such that the circumferential intervals (UK1, UK2) of the two classes (K1, K2) do not overlap and in each case have an interval variable smaller than the tolerance band (TB11, TB21, TB31) of the estimated circumference of the fitted tyres. Furthermore, the fitted tyres are assigned to one of the two classes (K1, K2) with the aid of their estimated circumference. The circumference of the fitted tyre is thus determined with the aid of the specific class allocation of the fitted tyre.

A controller according to an embodiment of the present disclosure is a controller for an air conditioner that performs air-conditioning according to room temperature, the controller comprises: a housing; a heat source temperature sensor disposed inside the housing, the heat source temperature sensor being configured to measure a temperature of a heat source that generates heat during operation as a heat source temperature; an internal temperature sensor disposed inside the housing at a position away from the heat source, the internal temperature sensor being configured to measure a temperature inside the housing as an internal temperature; and a control unit that determines the room temperature using a temperature difference between the measured heat source temperature and the measured internal temperature.