138 results about "Angle condition" patented technology

The invention provides a processing method based on fingerprint recognition and a mobile terminal, and relates to the technical field of computer security. The method includes the steps of receiving a fingerprint recognition instruction triggered by a user, obtaining a fingerprint input by the user when the inclination angle of the mobile terminal meets a first angle condition, and executing the fingerprint recognition operation according to the obtained fingerprint. The problems that a fingerprint unlocking process and a screen are frequently awakened by mistaken touching, or other operations are caused by fingerprint recognition false execution, and therefore the power consumption of the mobile terminal is too large and other misoperation can be caused are solved. The method has the advantages of effectively reducing fingerprint recognition operation caused by mistaken touching, reducing the power consumption of the mobile terminal caused by mistaken touching and decreasing the probability of other misoperation.

A method is provided for vehicle stability control of a vehicle where the vehicle includes a slip control braking system that applies independent braking pressure to respective vehicle brakes of the vehicle. The vehicle further includes a steer-by-wire assist steering system for applying steering intervention for stability control. The method includes detecting a split-mu braking condition and applying a steering assist torque to the steering system. A determination is made whether a steering wheel angle condition is within a predetermined threshold. An aggressive braking strategy is applied if the steering wheel angle condition is within the predetermined threshold, else applying a non-aggressive braking strategy.

The invention belongs to the field of air-conditioners, and particularly relates to an air-conditioner and an intelligent fire hazard early warning system and method thereof. According to the air-conditioner and the intelligent fire hazard early warning system and method thereof, a same infrared temperature sensor is used for both room temperature control and fire hazard early warning. Particularly, a rotation scanning device formed by the infrared temperature sensor and a rotation device rotates according to a preset time-angle condition so that temperature scanning is performed on the surface of objects in a room in which the air-conditioner is positioned and the acquired temperature data are fed back; integrated comparison and discrimination are performed on the received temperature data and a preset temperature-time relation; and fire hazard alarm processing is performed via the internet when the temperature data meet a preset abnormity condition via detection. With application of the air-conditioner and the intelligent fire hazard early warning system and method thereof, a user can be prompted to eliminate fire hazard hidden trouble before fire hazard so that life and property safety of the user is further guaranteed.

A geometric feature extracting device comprising: first input means for inputting a three-dimensional shape model of a measurement object; generation means for generating two-dimensional parameter planes corresponding to curved surface patches that configure the three-dimensional shape model; first calculation means for calculating normal directions to points on the curved surface patches; holding means for holding the parameter planes and the normal directions in association with each other; second input means for inputting an observation direction used to observe the measurement object from an observation position; selection means for selecting regions in each of which the normal direction and the observation direction satisfy a predetermined angle condition from the parameter planes; and second calculation means for calculating geometric features on three-dimensional shape model corresponding to regions selected by the selection means as geometric features that configure geometric feature regions on the three-dimensional shape model, which are observable from the observation position.

The invention discloses a ship large azimuth misalignment angle transfer alignment method based on volumetric Kalman filtering. The ship large azimuth misalignment angle transfer alignment method comprises the following steps: firstly, converting a specific force output of a secondary inertial navigation accelerometer to a navigation coordinate system; carrying out filtering processing on the specific force by utilizing a Butterworth digital low-pass filter; secondly, carrying out inertial navigation calculation on primary and secondary inertial navigation respectively; transmitting speed, posture and angular speed information of the primary inertial navigation to a navigation computer of the secondary inertial navigation; constructing measurement by utilizing speed error, posture error and angular speed error between primary and secondary inertial navigation system; then establishing a state equation and a measurement equation under a large azimuth misalignment angle condition by adopting a matching manner of a speed, a posture and an angular speed; finally, carrying out volumetric Kalamn filtering calculation by utilizing the established state equation and measurement equation and estimating a mounting error angle between the secondary inertial navigation system and the primary inertial navigation system, so as to finish transfer alignment. By adopting the ship large azimuthmisalignment angle transfer alignment method, the rapid and high-precision alignment problem of a ship under a condition of a large azimuth misalignment angle and a large lever arm error is solved.

The invention discloses a nozzle three-dimensional positioning and angle adjusting device comprising a nozzle body, a substrate, a horizontal direction conditioning mechanism, a vertical direction conditioning mechanism, a depth direction conditioning mechanism, a horizontal plane angle conditioning mechanism and a pitch conditioning mechanism. The horizontal direction conditioning mechanism is arranged at one side of the substrate; the vertical direction conditioning mechanism is arranged at the lower part of the substrate; the horizontal plane angle conditioning mechanism is arranged at the upper part of the substrate; and the nozzle body, the depth direction conditioning mechanism and the pitch conditioning mechanism are connected together and are arranged at the upper part of the horizontal plane angle conditioning mechanism. The nozzle three-dimensional positioning and angle adjusting device provided by the invention can adjust a position of the nozzle body in a full-direction manner, so that the injection angle of the nozzle is multi-dimensionally and accurately controlled. Therefore, the nozzle is more stable and more efficient to spray, so that the uniformity for adding sugar liquid and perfume liquid into a material can be ensured.

The invention provides an automobile climbing testing device composed of a guardrail, a dragging plate, an anti-skidding plate, a hinge pin, a chassis, an air pump, two hydraulic cylinders and four automobile wheels. The guardrail is installed on the anti-skidding plate and the dragging plate is installed at the bottom end of the anti-skidding plate. The anti-skidding plate is connected with the chassis through the hinge pin. The air pump and the hydraulic cylinders are installed on the chassis, and the automobile wheels are installed on the two sides of the chassis respectively. Compared with the prior art, the automobile climbing testing device is capable of meeting the requirement that the climbing performances, existing under different automobile angle conditions, of the automobile can be tested, provided with certain protective measures, free of repeated disassembly and convenient to move.

The invention relates to a strap-down inertial navigation system large azimuth misalignment angle initial alignment method based on MRUPF (Multi-resolution Unscented Particle Filter), comprising the following steps of: firstly, establishing a state space model for the initial alignment of a strap-down inertial navigation system static substrate under the large azimuth misalignment angle condition to carry out filtering initialization; then carrying out the state estimation of the initial alignment by utilizing a UPF filtering algorithm; selecting particles and particle weights by utilizing a multi-resolution method at a moment to reduce the number of the particles; and continuing to carry out the state estimation of the initial alignment by utilizing the UPF filtering method by taking the selected particle set and the particle weights as initial particle sets and the weights to obtain a misalignment angle estimated value. In the invention, the UPF particle number is reduced through the multi-resolution method, thereby reducing the calculated amount, and the real-time performance of the initial alignment of the strap-down inertial navigation system under a large azimuth misalignment angle is improved while the initial alignment accuracy is ensured. The invention is suitable for the initial alignment of the strap-down inertial navigation system.

The invention discloses a head mounted type display device based on holographic waveguide. The head mounted type display device comprises inlet coupling grating (1), left visual field deflection grating (2), right visual field deflection grating (3), outlet coupling grating (4), and rectangular waveguide (5). The inlet coupling grating (1), the left visual field deflection grating (2), the right visual field deflection grating (3), and the outlet coupling grating (4) are attached to the upper surface or the lower surface of the rectangular waveguide (5). Whether the inlet coupling grating (1), the left visual field deflection grating (2), the right visual field deflection grating (3), the outlet coupling grating (4), and the rectangular waveguide (5) are attached to the upper surface or the lower surface is determined by an exit entrance pupil light design direction. By adopting a pupil remodeling way, a visual field separation problem of a conventional two-dimensional pupil dilation way under a large visual field angle condition is solved.

The invention provides a variable wrap angle flatness control parameter processing method for a cold rolling mill, which is used in a variable wrap angle flatness measuring system of a contact type cold rolling flattening roll and provides conditions for realizing precise flatness control. The measured value processing method presents the relation between the magnitude of radial force borne by a sensor on a contact type flattening roll without a roll collar and a wrap angle, and presents an expression of the measured value of the flatness under the real-time variable wrap angle condition according to the flatness detecting principle of the contact type flattening roll without the roll collar and the stressed state of the sensor under the action of strip steel tension. The model is used ina variable wrap angle flatness measuring system of the contact type cold rolling production flattening roll to obtain precise measured value of flatness.

The invention relates to a rotor torsion oscillation testing device and a testing method thereof, belonging to the technical field of torsion oscillation measurement. By using a method of separating the testing device from a rotor shaft and testing the torsion oscillation level of the shaft without contacting with the rotor, the condition of generating the torsion oscillation by a rotor system under multi-angle condition can be tested and the vibration conditions corresponding to different bias angles can be acquired. Besides, the actual rotor system can be adjusted so as to reduce the unnecessary torsion oscillation generated in the actual running process. The device can be used for testing the level of the torsion oscillation generated by the rotor system at a rotating speed. The device is conveniently operated, the result is clear and intuitional and the accuracy is high.

The invention discloses a high squint synthetic aperture radar imaging processing method, which comprises the steps of S1, calculating high squint synthetic aperture radar echo signals; S2, carrying out range fast Fourier transformation (FFT) and spatial-variant range walk correction on the echo signals, and removing range spatial-variant range walk; S3, carrying out range pulse compression and high-order range migration correction on the echo signals, and removing residual range migration; S4, carrying out azimuth spatial-variant property fitting of Doppler parameters on the echo signals; S5, balancing the Doppler centroid and the slope of frequency modulation of target points of the same range cell by adopting an extended azimuth nonlinear frequency modulation scaling algorithm; and S6, carrying out azimuth focusing so as to acquire an imaging result. The high squint synthetic aperture radar imaging processing method solves a range spatial-variant property and an azimuth spatial-variant property of the Doppler parameters, can realize precise focusing of monostatic SAR echo signals under a high-squint-angle condition, and can be widely applied to the fields of earth remote sensing, resource exploration, geological mapping, military reconnaissance and the like.

The invention provides a guide rule designing method in yaw gesture control over a satellite. The method comprises the following steps that firstly, the track solar angle (an angle beta for short) and a sun vector under a track system are calculated; secondly, when the angle beta is larger than or equal to a given threshold value, a target yaw angle is calculated according to a current track system sun vector, and when the angle beta is smaller than the given threshold value, the target yaw angle is calculated according to a hypothesis sun vector with the angle beta being an assigned angle; thirdly, when the angle beta crosses zero and when it is met the condition that the target yaw angle is a small angle at the same time, a calculation method of the target yaw angle is switched.

The invention discloses a gait recognition method based on a 3D dense convolutional neural network. A network in the method employs 3D convolution to extract the transformation features of a gait at atime dimension, and has the feature retaining capability of a DenseNet structure. According to the invention, the method achieves the training of a classification and recognition model with the excellent performances under the conditions that a network depth is smaller and the number of training samples is smaller, wherein the classification and recognition model can recognize the identity according to the gait in a video. The testing on Dataset A of a CASIA gait database indicates that the method can achieve the training of the gait recognition model under the condition that the training samples are not sufficient. Moreover, the method is high in training speed, is small in model parameters, is high in recognition efficiency, and has the considerable recognition capability under the single-view-angle or cross-angle conditions.

The invention discloses a maximum output power control method for tracking of a wind power generation system. The method comprises the steps of sending a measured environmental wind speed signal to a controller through a wind speed sensor; determining a given running speed signal of a wind power generator under the current wind speed condition according to a wind speed-maximum power feature curve stored in the system; comparing the given running speed signal with the actual running speed signal of a generator; conditioning the signal through a conditioner to output a control signal; conditioning the electromagnetic torque of the generator according to the control signal and on the basis of the current voltage, current, position of magnetic pole and angle condition of the generator to enable the running speed of an AC generator to be close to the expected running speed, so as to reach the specified instruction running speed. According to the method, the wind speed sensor is used for sensing the environmental wind speed, and the running speed of the wind power generator of the wind power generation system is fast close to the maximum power point under the current wind speed condition and finally reaches the maximum power running point, so as to achieve the purpose of tracking the maximum wind energy of the wind power generation system.

The invention provides an iterative guidance method based on yaw angle conditions, the method comprising vector calculation under a launch inertia system and calculation of vector conversion under aguidance coordinate system, estimation of remaining flight time, calculation of first and second integrals of thrust term and gravitational term, solution of program angle coefficient and program angle conversion under two coordinate systems. This iterative guidance method can be used to solve the guidance problems at large yaw angles due to large initial deviations or other reasons. The guidancecommand is simple in structure and practical in engineering, which can enhance the adaptability of iterative guidance method and provide technical support for the future development of advanced launchtechnology in China, including vertical take-off and landing, self-adaptive orbiting and so on.

The invention discloses a display device driving method and a display device. The driving method comprises steps that a pre-display image is acquired; n sets of target gray scale value pairs of a pixel set are acquired through table query according to an average value of preset gray scale values corresponding to two blue sub pixels of the pixel set; one pre-display image is displayed in m continuous frame display periods; each pixel set comprises two pixels; the gray scale values of the two blue sub pixels of one same frame display period pixel set are respectively a first target gray scale value greater than the preset gray scale value and a second target gray scale value smaller than the preset gray scale value in one target gray scale value pair set; the target gray scale values corresponding to the pixel set on the same position of the display panel in at least two frame display periods are different. The driving method is advantaged in that a color cast problem of the liquid crystal display panel under the large vision angle condition is further ameliorated.

The invention relates to a concrete I-II compound crack fracture performance test method, and belongs to the technical field of physical test methods. According to the method, an upright and sloping three-point bent beam is adopted for testing, and on a fracture tip, a central symmetry mode is adopted for fixing a clamping extensometer cushion block, so that I-type failure crack opening displacement in a I-II compound fracture failure process is determined; in a calculation process, with the help of a double K fracture theory, a fracture angle function f(theta) is introduced to obtain compoundcrack fracture toughness under different fracture angle conditions, and a more accurate concrete I-II compound fracture coherency equation can be built. By means of the method, safety assessment of the structure fracture performance is achieved, an existing finite element numerical simulation technology is broken through, accurate judgement of the common compound fracture mechanical performance is completed, and a basis is provided for the long-term stability and the fracture toughness of a concrete crack.

The invention belongs to the field of stray light inhibition design of optical systems and relates to a light blocking ring arranging method based on a stray light inhibition angle. The method is mainly based on attributes of matt paint sprayed on the inner wall of a light shield and the minimum stray light inhibition angle of a whole optical system. Through reasonable design arrangement, the aimthat the point source transmittance (PST) value at the inhibition angle point is achieved. The type of the black matt paint sprayed to the inner wall of the light shield is determined, then surface attributes of the black matt paint of the type are tested, absorption attributes of the black matt paint under different incident angle conditions are obtained according to test results, the incident angle alpha where the absorption rate of the black matt paint is highest is selected to serve as the inclination reference angle of a light blocking ring, after a ring tip coordinate point A of the first-level light blocking ring is determined, the inclination angle beta of the light blocking ring is set to be 90o-(alpha+theta), and the optimal PST value at the inhibition angle can be obtained.

The invention provides a flow pattern and pressure simulation experiment device and method for two-phase flow of a wellbore of an air and water mixed injection well. The device mainly comprises an experiment loop, an supporting system and a measurement and control system, and can realize flow pattern and pressure experimental simulation for air-water two-phase down flow of vertical, tilting and horizontal sections of the air and water mixed injection well. Experimental mediums comprise air and water; the air is supplied by an air compressor, and the water is supplied by a centrifugal pump; the air and the water flow into the vertical pipe section, the tilting section and the horizontal section after passing through an air-liquid mixing section; all the pipe sections are transparent organic glass pipes, so that the flow pattern can be conveniently observed; pressures at two ends are respectively measured through pressure sensors; the angle of the tilting pipe section can be adjusted within 0 to 90 degrees, so that flow pattern and pressure experimental simulation for the air-liquid two-phase down flow of the tilting pipe section under any angle condition can be realized; the flow pattern of the air-liquid two-phase down flow of each pipe section can be shot through a high speed camera. The flow pattern and pressure simulation experiment device and method can realize the flow pattern and pressure experimental simulation for the air-water two-phase down flow of the vertical, tilting and horizontal sections of the air and water mixed injection well.

The invention relates to a motion parameter optimization method for optimal energy consumption of an underwater glider. The method comprises the following steps that: an initialization parameter of an underwater glider is input; a minimum value in motion parameter constraint condition values is used as an initial value of a to-be-optimized motion parameter; an enumeration calculating method is employed to respectively calculate G function values in the motion parameter constraint condition values under all glide angle conditions; a glide angle corresponded to a maximum G function value is determined; an iteration step size is added to a glide speed; if a maximum glide speed constraint condition is exceeded, an iteration step size is added for a glide depth in the motion parameter constraint condition values; and if a maximum glide depth constraint condition is exceeded, a maximum value in a G function value sequence is determined as well as a glide speed, a glide depth and a glide angle are optimal glide motion parameters, wherein the glide speed, the glide depth and the glide angle are corresponded to the maximum value in the G function value sequence. According to the invention, a system energy consumption feature and a motion performance of an underwater glider are comprehensively optimized; an energy utilization rate of the underwater glider is improved; and endurance capability of the underwater glider system is also enhanced.

The invention relates to a genetic algorithm and adaptive threshold constraint-combined ICP (iterative closest point) pose positioning technology. The genetic algorithm and adaptive threshold constraint-combined ICP (iterative closest point) pose positioning technology can be applied to the fast six-degree-of-freedom pose positioning of box chaotic workpieces. Statistics filtering and a regional growth segmentation algorithm are adopted to pre-process original point cloud, and therefore, outliers are removed, and the point cloud set of the chaotic workpieces is obtained; a genetic algorithm is adopted to obtain the global optimal solution of a target point set relative to the initial pose of reference point cloud, and the number of iterations of an ICP (iterative closest point) algorithm is decreased; adaptive threshold constraint is adopted to eliminate local large deformation points, and Euclidean distance constraint is adopted to eliminated most large deformation points, normal vector included angle threshold values are adopted to eliminate wrong matching point pairs which satisfy a distance condition but do not satisfy an included angle condition; and therefore, the real-time performance of the algorithm can be ensured, and the accuracy of pose positioning can be improved.

The invention discloses a wind-power electric system transient state coordination control method based on phase trajectory analysis. The wind-power electric system transient state coordination controlmethod includes subjecting a system to transient state time domain simulation by taking maximum fan capacity as a basic operation point; performing homologous clustering according to acquired power angle conditions to acquire an equivalent two-machine system phase trajectory; calculating instable sensitivity matrixes when the transient state of the system is instable, sorting the matrixes in an ascending order to acquire a priority matrix, and regulating output of power generators according to the priority matrix to acquire a stable operation mode; calculating sensitivity matrixes for coordination control of the power generators when the transient state of the system is stable, and sorting the matrixes in an ascending order to acquire a priority matrix; calculating a reduced fan output value in each time period according to wind power output in a day, solving a transient state coordination control mathematic model during fan output fluctuation, and formulating transient state coordination control measures for each time period sequentially to guarantee transient state stability of the system. By the wind-power electric system transient state coordination control method, electric system dispatching staff can be guided to formulate day-ahead dispatching strategies of wind power access systems.

The invention discloses a monitoring and testing method, including acquisition of satellite monitoring sensitivity, for an electric-transmission-line mountain fire satellite monitoring system. The monitoring and testing method includes selecting a testing satellite, an open site, a season, weather, time and orbit azimuth angle conditions, preparing a ground monitoring and measuring device, taking firewood as a flaming material, laying a fire ground at the center of the site, recording coordinates of the fire ground, setting fire to the fire ground before satellite transition, observing a quick satellite view in real time and recording time spent by system preprocessing during satellite transition, repeating fire-point judgment after pre-processing, observing whether the satellite can find the test fire ground or not until finding the critical length of the testing satellite finding the fire ground, and squaring the critical length to acquire the sensitivity of the testing satellite. The monitoring and testing method can be used for acquiring sensitivity, distortionless reception range and fire-point judgment threshold of the monitoring system under the conditions such as different weather and territories, thereby having great guiding significance for operation and accuracy improvement of the electric-transmission-line mountain fire monitoring system.

The invention discloses a photovoltaic module glass crack method, device and apparatus and a storage medium. The module includes: binarizing an image of a photovoltaic module to obtain a binarized image; extracting a contour of the binarized image to obtain an initial contour set C; filtering all initial contours according to the area of the outer rectangle and the number of corner points to obtain the contour set G of the photovoltaic module; traversing other initial contours except the photovoltaic component contours in the initial contour set C, obtaining an initial contour contained in anyof the photovoltaic component contours, and generating a candidate contour set S; detecting corner points of all candidate contours, and calculating an included angle between an adjacent corner pointvector of each candidate contour and an edge of a photovoltaic component contour to which each candidate contour belongs; when the number of included angles meeting a predetermined angle condition issmaller than a preset threshold ratio, judging that cracks exist in the glass of the corresponding photovoltaic module. Through the invention, glass crack detection of the photovoltaic module can berealized automatically, accurately and timely.

The invention provides an approximate expression method for anisotropy of structural surface roughness based on median number function. The method comprises: obtaining the three-dimensional point cloud coordinate data of a structural surface; extracting the contour lines of structural surfaces in different sizes in different measuring directions and the coordinate data of the contour lines; measuring the structural surface roughness coefficient of each measurement section; in the condition of different sizes, making statistics and analysis of the structural surface roughness coefficients in the directions; calculating the statistical average value of the obtained structural surface roughness coefficients and the standard differences; using the sum of the statistical average value and the standard differences as the upper limit values and the differences as the lower limit values; drawing the anisotropy diagrams under the conditions of different sizes; fitting the upper limit values and the lower limit values in different directions through the use of an elliptic equation to obtain the expression of the median number function for the polar coordinates of the structural surface roughness coefficients; calculating and obtaining the interval range under different angle conditions; and obtaining the interval ranges of the roughness coefficients in all directions of the structural surfaces under conditions of different sizes. The method of the invention is capable of approximately expressing the uncertainty of the anisotropy of structural surface roughness.