35results about How to "Method steps are clear" patented technology

The invention discloses a remote sensing satellite imaging task autonomous aggregation method which comprises steps of firstly, identifying the task density degree in a local planning window range, judging whether the candidate to-be-observed task set needs autonomous aggregation of remote sensing satellite imaging tasks or not; when the autonomous aggregation is needed, dividing the candidate to-be-observed task set to obtain a plurality of dense task subsets; then, calculating external polygons of the dense task subsets respectively; determining a task aggregation mode of the dense task subsets according to the external polygons of the dense task subsets; dividing each dense task subset into a plurality of strip observation subtask sets and a region observation subtask set; and finally,generating a plurality of strip observation aggregation tasks according to the plurality of strip observation sub-task sets, performing push-broom strip division, generating a region observation aggregation task according to the plurality of region observation sub-task sets, and performing push-broom strip division to complete autonomous aggregation of the remote sensing satellite imaging task.

The invention provides a combined test method of a dynamic simulation device and an engineering control system. The method is characterized in that: through a dynamic simulation device in a flexible direct current power transmission system, carrying out a real-time closed-loop test on a converter station level control system of a direct current power transmission systems engineering of an actual modular multilevel voltage source transverter, wherein adjusting a parameter of the dynamic simulation device is included; carrying out converter valve unlocking and locking tests of the dynamic simulation device; carrying out starting stopping flow tests of an engineering control system; carrying out power-fail recovery tests of the engineering control system and the dynamic simulation device; carrying out a zero load adjusting test of the control system; carrying out a dynamic simulation device with a passive load test with the control system; carrying out an STATCOM operation mode combined test with the control system and the dynamic simulation test device. According to the invention, an operation mode of engineering is simulated, dynamic response of an MMC transverter and alternating current and direct current fields to a control system instruction are simulated, thus verification of control system software and hardware is realized.

The digital phase-locking method incldues the following steps: firstly, making digital phase discrimination of inputted locked signal to obtain phase error signal, making high-frequency modulatino pretreatment of said signal to obtain phase error signal, making high-frequency modulation pretreatment of said signal to obtain forward-backward pulse signal, then making the control pulse being in the formed-backward pulse signal undergo the process of proportional pulse frequency division to obtain proportional forward-backward pulse signal, making proportional forward-backward counting operation to obtain parameter NF', latching parameter NP' before it is cleared, outputting to obtain proportional control parameter NP, at the same time making the control pulse being in forward-backward pulse signal undergo the process is integral pulse frequency division to obtain integral forward-backward pulse signal, mkaing integral forward-backward counting operation to optain integral control parameter NI, adding parameter NP and NI, and utilizing amplitude control to obtain parameter N, under the control of it, making digital control frequency synthesis of clock signal to obtain synchronous double-frequency signal.

The invention relates to the technical field of power semiconductor devices, discloses a structure optimization design method for a TO package power semiconductor device, and aims to provide a practical design tool for the structure optimization of a TO package power semiconductor device. This method first defines the optimization objectives, design variables and constraints of the power semiconductor device to be optimized; secondly, a finite element analysis model is established to analyze the thermal stress and warpage of the chip in the device; thirdly, combined with response surface technology, two The structure optimization model optimizes the chip structure size and position size in turn. Compared with the existing technology, this method sequentially optimizes the chip structure size and position size, which can minimize the chip warpage and meet the constraints of thermal stress and chip area; the steps are clear and easy to understand, and can be directly used to solve the power consumption of general TO packages. The structural design of semiconductor devices has good ease of use and applicability.

The invention discloses a detection method of the relevancy between rustiness of a stainless steel coil and ignition of a PVC material. The method comprises the following steps: 1) detecting the environment between a fire scene and a stainless steel coil storage scene, and judging whether fire combustion residue can float to the stainless steel coil; 2) opening the stainless steel coil, and detecting whether the rust degrees of the inner coil and the outer coil of the stainless steel coil are the same; 3) observing the rust trace on the surface of the stainless steel coil, and observing whether an adhered foreign matter exists on the surface; 4) performing element detection on the rust surface of the stainless steel coil, and determining whether chlorine element exists in a rust spot; 5) determining the fact that rust of the stainless steel coil is related to the ignition of the PVC material when the chlorine element exists in the rust spot, and determining the fact that rust of the stainless steel coil is not related to the ignition of the PVC material when the chlorine element does not exist in the rust spot. The method is simple in operation and reliable in results, and can rapidly obtain a conclusion whether rust of the stainless steel coil is related to a PVC fire.

The invention discloses a blasting parameter optimization method capable of guaranteeing safety of above-ground structures. The blasting parameter optimization method comprises the steps that a blasting testing program is formulated; blasting is carried out according to the testing program, three sets of testing data of all measuring points in the vertical direction, horizontal radial direction and horizontal tangential direction are obtained, and the set of testing data which the maximum peak velocity arithmetic mean value corresponds to are taken as analyzing data; a v-f calculation model and a blasting vibration velocity model of a blasting zone are solved; the peak value vibration velocity and the main frequency in the initial blasting design program are solved; the peak value vibration velocity and the main frequency contrast with an existing blasting vibration safe and permitted standard point by point, the initial blasting design program corresponding to the peak value vibration velocity and the main frequency which do not conform a safety regulation for blasting is adjusted until the blast vibration safety allowance standard is met. The method is high in applicability, operation is simple, civil and economic disputes and construction delay caused by blasting vibration damage to the above-ground structures can be avoided, and the economical benefits of construction sides are greatly improved.

The invention belongs to the field of optical precision testing and specifically relates to an aspheric surface parameter determining method in tilted-wave interferometer. The method includes steps of1, according to a given aspheric equation and diameter, dividing an aspheric surface evenly according to an angle; setting the center of incoming spherical waves and calculating mirror points of thecenter of the spherical wave relative to each node by utilizing a formula; emitting light to corresponding node coordinate positions from the mirror points so as to form a reflection wave face, judging a distribution range of measurable interference fringes according to the phase difference distribution between the calculated reflection wave face and reference spherical waves, moving the positionof the center of the spherical waves, repeating the above process until the whole aspheric surface can be measured; therefore, positions of all the spherical wave sources are determined and design ofa point source array is implemented. The method is clear in steps, accurate in calculation and wide in application range; by using a computer program, design can be made quickly; approximate evaluation is not needed during the calculation process and the calculation result is accurate.

The invention discloses a hole edge three-dimensional crack modeling method based on finite element software. The method includes the following steps: step A1, crack body generating; step A2, crack surface generating; and step A3, grid sweeping: grid division is carried out on the outer surface of the crack body, singularity of a crack tip end of the outer surface is defined, then, a divided surface grid is swept along the direction of a crack tip end line, and grid division of the whole crack body can be finished. All the adopted modeling methods such as solid building, size overlapping and the grid sweeping are universal methods and can be used in most commercial finite element software, and universality is strong in actual operation; and the whole train of modeling thought of the hole edge three-dimensional crack modeling method based on the finite element software can be used for building hole edge three-dimensional cracks of various holes such as round holes, square holes and dimple holes in various structure types such as plane structures, curved surface structures and combined structures, and the university in application fields is strong.

The invention provides a method and system for photoelectric ranging meteorological correction. An unmanned aerial vehicle and a corresponding ground control module are arranged, and wireless communication of a ground control system and the unmanned aerial vehicle is established; a communication module, a GNSS module, a temperature sensor, a barometric sensor, a humidity sensor and a storage module are arranged on the unmanned aerial vehicle in a carrying mode; the unmanned aerial vehicle flies back and forth along a designed air route, a photoelectric ranging instrument performs repeated ranging on a target point many times in the period, and meteorological elements on a ranging signal transmission route are measured while ranging is performed; the average value of temperature, barometric pressure, humidity and distance is solved, and meteorological correction is achieved. The system is simple in structure, and labor division of modules is clear, steps of the method are clear, and the scheme can be achieved easily. By means of the method and system, the meteorological elements on the ranging signal transmission route can be accurately measured, meteorological element representativeness in the prior art can be greatly reduced, and therefore photoelectric ranging precision is improved, and a reliable guarantee is provided for high-precision measurement.

The invention discloses a scaffold fastener slipping alarm device comprising a limiting device and a warning device; the limiting device comprises an E-shaped sleeve fixed on an end of a cross bar through a first buckle; the limiting device comprises an U-shaped sleeve fixed on a side surface of a vertical rod through a second buckle; the warning device comprises a first warning device and a second warning device which are in parallel connection with a power supply; two sets of touch control switches are in parallel and are in series connection with the power supply and a second warning device; four sets of pressure switches are in parallel and are in series connection with the power supply and the first warning device; The invention also discloses an installation method for the scaffold fastener slipping alarm device. Glass beads of the installation method effectively protect the relative position of the E-shaped sleeve and the U-shaped sleeve; the invention provides a step alarming scheme, which effectively solves the problem that there is no warning device for the scaffold fastener slipping. The installation method of the invention has the advantages of clear steps and easy operation. The invention effectively solves the problem that there is no warning device for the scaffold fastener slipping.