136results about How to "Easy to analyze and calculate" patented technology

A method and system for computer-assisted analyses of best practice safety assessment generates quantitative indicators of safety performance by using a questionnaire with questions in various sections directed to different areas of safety performance evaluation. Scores are given to the questions based on answers entered by an evaluator. The scores for the questions in each section are weighted and summed to provide a section score, and the section scores are weighted and summed to generate an overall score for the assessment. The scores for the individual sections and the overall score can be compared with scores of other clients and the average scores of the industry, and expected losses can be predicted based on the scores.

The invention discloses a temperature control method and system for an intelligent air conditioner as well as the air conditioner, and relates to the field of temperature control of air conditioners. The temperature control method aims to solve the problem that sleep quality is affected when a human body feels an over-heating or under-cooling condition due to the fact that after people sleeps soundly, an air conditioner cannot make proper temperature regulation on a sleep environment in real time according to the temperature of the human body and the indoor temperature. The temperature control method comprises the following steps of: after a user enters a sleep mode through buttons of a remote controller, carrying out temperature scanning on an indoor environment every certain time to generate infrared heat pictures; judging a position on which the human body is located according to temperature distribution of infrared heat pictures; judging a position on which a bed body is located according to frequency that the human body appears on different positions within certain time period; obtaining a heat dissipating capacity changing condition of the human body according to the position on which the human body is located in the infrared heat images, the position on which the bed body is located and temperatures of other areas, and carrying out temperature control according to the heat dissipating cavity changing condition of the human body. The temperature control method is suitable for temperature control in a sound-sleep process of people.

The invention discloses a sand control test device and method for natural gas hydrate mining. The test device is composed of a constant speed constant pressure constant-flux pump, a piston mixing vessel, a sand control experiment reactor (with visual high pressure resistance, capable of intuitively observing the experimental process), a constant temperature constant pressure air supply device, and a data acquisition module. The test device and method are capable of carrying out gas-liquid-solid three-phase flow and gas-solid and liquid-solid two-phase flow high/low-pressure sand control experiments according to natural gas hydrate reservoir characteristics and depressurizing production requirements. The test device is provided with a plurality of temperature, pressure and flow sensors and is capable of performing dynamic monitoring on the sand control and sand outlet test processes and analyzing the pressure change and corresponding permeability rules at each stage of the natural gas hydrate mining sand control test. Moreover, the sand control process parameter can be optimized by adjusting the sand control simulation test scheme, the sand control effect is evaluated, and different pressure drop-capacity-sand yield change rules and characteristics thereof are conveniently analyzed and calculated.

The invention discloses a torsional vibration signal detection method and device for an engine crankshaft. The torsional vibration signal detection method includes that gathering rotation pulse signals of the front end of the engine crankshaft, converting the rotation pulse signals into rotating speed signals and angular speed signals, extracting the high-frequency component from the angular speed signals, performing point-by-point integration, converting a high-frequency time domain signal obtained through integration into a frequency domain signal through fast Fourier point-by-point transformation, and inputting the rotating speed signal nk of each equalization signal Qk and angular displacement frequency domain signals Yk into a three-dimensional coordinate system in sequence through a three-dimensional torsional vibration data generating module of the engine so as to obtain three-dimensional torsional vibration data of the engine, wherein the horizontal coordinate is related to the torsional vibration frequency of the engine, the left vertical coordinate is related to the amplitude, and the right vertical coordinate is related to the rotating speed. The torsional vibration signal detection device uses the combined design, the mounting is facilitated, and the detection is not influenced by the engine and outside vibration; the torsional vibration signal detection device is good in reliability, high in measuring precision, convenient to analyze and calculate, strong in adaptability, light in weight and strong in portability.

The invention provides an assessment method for building damage after fire, and the assessment method for the building damage after the fire includes the following steps: 1. collecting data of a scene of the fire, 2. modeling the scene of the fire according to the data of the scene of the fire and carrying out fire simulation in the scene of the fire for achieving fire simulation results, 3. analyzing the fire simulation results, 4. establishing a finite element model, and adding second data to the finite element model for finite element analysis so as to obtain finite element analysis results, 5. carrying out safety assessment for the finite element results. Provided is a corresponding system. The assessment method for the building damage after the fire can be widely used for the fire reappearance and the practice of the safety design of the building structure after the fire, not only can improve the accuracy and reliability of the reappearance of the building fire, but also can greatly save time and cost for the reappearance of the building fire and the safety design of the structure. Therefore, the assessment method for the building damage after the fire has an important theoretical guiding significance and a practical value.

The invention discloses a determination method for failure parameters of materials with complex defects. The determination method comprises the following steps: firstly, preparing material test pieces, then carrying out polishing treatment on the surfaces of the test pieces, and spraying reflection-eliminating paint with two color differences to the surface of each test piece till the surface of each test piece is in a speckle state; then carrying out tensile loading on the two ends of each test piece by utilizing a mechanical testing machine till the test piece is completely broken; then carrying out image recording on the loading process by using 3D-DIC optical measuring equipment, thereby obtaining displacement-field distribution of the whole-process loading of each test piece; selecting a closed integration path enclosing all the defects, and obtaining a value of M integration by utilizing a definition formula of the M integration; and finally, calculating the failure parameters of samples, wherein Pi is equal to ME/(Sigma<2>A<D>), the failure rule of the complex defects of the materials is defined as that Pi is more than or equal to Pi<C>, and when the calculated Pi parameter reaches to the critical value Pi<C>, the defects start to be unstable and extend.

The invention relates to a wheel profile laser measurement device. An electromotor is fixed on one end of a base, and is connected with a drive screw, and an incremental photoelectric encoder is mounted on the other end of the drive screw; a guide rod which is parallel with the drive screw is arranged on the base as well, and the bottom of the base is fixed on a rail through supporting blocks; a movable slider is sleeved on the guide rod, and also cooperates with the drive screw by means of screw threads; a movable rod is fixed on the movable slider, a laser head of a laser displacement sensor is fixed on the top of the movable rod, the serial port and the USB port of the laser displacement sensor are respectively connected with the serial port and the USB port of a computer, and the signal output end of the incremental photoelectric encoder is connected with the control signal input end of the laser displacement sensor. The test device can conveniently measure the abrasion change of a wheel profile on the spot; moreover, the device is convenient to carry and easy and convenient to operate, the measurement precision is high, and the repeatability of test data is good.

The invention provides a laser emission module and a 3D imaging device, and relates to the technical field of optical devices. A light source assembly can emit light beams. The emitted light beams arecollimated by a collimating mirror and then parallel light beams are emitted; the parallel light beams pass through a diffractive optical element, and then the light beams are copied and spliced to form multiple beams of parallel light; a plurality of beams of parallel light are emitted to a zoom-out lens and shrunk at a preset multiplying power and then projected into a target space to generatea speckle pattern and thus the purpose of reducing the field angle of the laser emission module is achieved, and the density of the speckle points in a unit area is improved; meanwhile, the diameter of the speckle points can be reduced through the reducing lens, and the purpose of improving the energy density of the speckle points is achieved. Therefore, the texture of the target space is clearer,the contrast ratio is higher, more accurate depth measurement information can be conveniently obtained by the laser emission module during long-distance application, and a foundation is laid for wideapplication of the laser emission module.

The invention provides a device assembly for tensioning a fork ear type stay rope or a steel pull rod. The device assembly comprises a counter-force rack, a tensioning rod, a carrying pole beam and a jack; the counter-force rack is of a similar U-shaped structure and divided into two pieces; the opening of the U-shaped structure is designed into a step shape, and a bolt holes and a tensioning rod semicircular groove I to allow the tensioning rod to pass through are formed in the step; the carrying pole beam is of a split two-half structure, and the stay rope or the steel pull rod is capable of passing through the middle of the split two-half structure, and tensioning rod semicircular grooves II for mounting the tensioning rod are formed on the two sides of the split two-half structure; when the device assembly is applied to tensioning construction, the two pieces of the counter-force rack are mounted on the two sides of the fork ear of the fork ear type stay rope or the steel pull rod and are integrated by use of a bolt and a connecting plate; the two-half carrying pole beam is mounted on the extension cylinder end of the fork ear type stay rope or the steel pull rod and fixed by use of a bolt; the tensioning rod is put through the carrying pole beam and the counter-force rack, and anchored by use of a fixing nut at one end of the counter-force rack; the jack and a base plate are mounted on the other end of the tensioning rod and the other end of the tensioning rod is anchored by use of a tensioning nut; the device assembly is good in safety and high in universality in tensioning construction.

The invention relates to a combustion working condition real-time monitoring system for a gas-fired boiler. The combustion working condition real-time monitoring system comprises a data acquisition system, a gas-fired boiler efficiency real-time calculation system, a user message receiving system, a boiler operation real-time working condition adjustment device and a user message feedback and improvement system, wherein the data acquisition system is used for measuring real-time working condition data of the water supplying temperature, the steam temperature, the fuel gas pressure, the steam pressure, the fuel gas flow and the steam flow of the gas-fired boiler; the gas-fired boiler efficiency real-time calculation system is convenient for performing comprehensive analysis and calculation on various acquired data; and the user message receiving system, the boiler operation real-time working condition adjustment device and the user message feedback and improvement system are convenient for a user to receive data through a remote data transmission system, get real-time boiler operation working conditions, adjust according to the working conditions and improve the boiler operation working conditions continuously. Real-time monitoring, timely adjustment and continuous improvement for the working conditions are integrated organically, so that the gas-fired boiler finally operates at a high-efficient optimized working condition state; the conception is novel; the scheme is reasonable, scientific and energy-saving; and high practicability is provided.

The invention relates to a heat flow fabric cool feeling test device and test method. The test device is characterized by comprising a probe and an experiment table provided with a thermal insulation board; the thermal insulation board is covered with a thermal insulation glass shield; the probe comprises an aluminum rack internally provided with a constant temperature heat source and a temperature sensor; heat conduction silicone grease is uniformly smeared at the lower surface of the aluminum rack and is used for fixing 1-2 heat flow sensors; soft heat conduction silicon gel is smeared at the surfaces, contacting a fabric sample, of the heat flow sensors. The test device also comprises a host and a computer; the host is provided with a heat flow meter and an intelligent PID temperature control meter. The temperature sensor feeds a temperature signal back to the intelligent PID temperature control meter which controls the constant temperature heat source to heat, so that the probe is constant in temperature, the probe is placed on the fabric sample, the heat flow sensors generate a signal which is sent to the heat flow meter, and the heat flow meter is communicated with the computer. The test device and test method can conveniently, reliably and fast detect contact instant cool feeling and durable cool feeling performance of various fabrics.

The invention provides a knee-joint rehabilitation robot realizing two translation and one rotation movements. A thigh fixing support frame of a thigh fixture is connected with a first support chain upper connecting rod adjusting device through a rotation pair A, and a first support chain lower connecting rod adjusting device is connected with a shank fixture through a rotation pair C; the thigh fixing support frame of the thigh fixture is connected with a second support chain upper connecting rod adjusting device through a cylindrical pair, and a second support chain lower connecting rod adjusting device is connected with the shank fixture through a hooke hinge; the thigh fixing support frame of the thigh fixture is connected with the free end of an electric push rod of a third support chain through a rotation pair D, and the fixed end of the electric push rod is connected with the shank fixture through a rotation pair E. The knee-joint rehabilitation robot is large in rigidity, strong in carrying capacity, small in accumulated error, and high in movement precision, can well adapt to the movement rule of the human knee-joints, is good in bio-imitability, and has no interference with the legs during the rehabilitation process, the work space of the swing direction of the shanks is increased, the movement locus of the human body can be changed, the demands of patients with different knee joint sizes can be satisfied, and the universality is good.

The invention discloses a strong draining and seepage-based upstream type tailings pond fill dam. The strong draining and seepage-based upstream type tailings pond fill dam is built by an upstream type damming method on the basis of a two-level dam structure of a tailings pond, wherein the two-level dam structure comprises a primary dam and a seepage-prevention dam; fine-grain tailings are piled up in an upper pond of the seepage-prevention dam, and coarse-grain tailings are piled up in a lower pond between the primary dam and the seepage-prevention dam; a tailings pond bearing body is formed by the coarse-grain tailings under the action of hydraulic classification; the seepage-prevention dam is taken as a dividing line for the upper pond and the lower pond, and the seepage lines of the upper pond and the lower pond intersect on the seepage-prevention dam. The damming technology of the tailings pond fill dam comprises the following steps: firstly, constructing to build the seepage-prevention dam to cause the upper pond to form a coarse-grain tailings depositing beach; then, constructing the primary dam in the downstream area of the seepage-prevention dam, respectively piling up the fine-grain tailings and the coarse-grain tailings in the upper pond and the lower pond, and lifting the fine-grain tailings to the upper pond by a pump ship in a temporary stagnant area in the upstream area out of the depositing beach; finally, the tailings are piled to a final elevation by an upstream type damming method. The strong draining and seepage based upstream type tailings pond fill dam is favorable for further improving the safety and the economy of the tailings pond by combining with the advantages of the upstream type damming method.

The invention discloses a fuzzy intelligent decomposition-coordination extreme response surface method of reliability-based optimal design. The method comprises the specific steps that the output response of a blade in the corresponding failure mode and the output response of a turbine disc in the corresponding failure mode are obtained respectively through heat-structure coupling certainty analysis; a fuzzy intelligent decomposition-coordination extreme response surface function (FIDCERSF) is constructed; dynamitic reliability sensitivity analysis is conducted by using an MCM; a fuzzy decomposition-coordination reliability-based optimal design model (FDCRBDO) is constructed. The method has strong advantages in the aspect of the overall reliability optimization design of a structure in a multi-component and multi-failure mode.

The invention discloses a simulation analysis method for temperature distribution of an optical fiber composite undersea cable during earth faults and relates to the field of fault simulation analysis. At present, an undersea cable has a complex structure, and huge difference exists among various layers of materials; when simulation is performed by adopting simulation analysis, the conditions of large data volume, complex calculation, extremely-tedious analysis of a temperature distribution rule and accurate analysis results possibly occur. The simulation analysis method comprises the following steps: establishing a geometrical model of the earth faults of the undersea cable; setting the type of an electrothermal coupling finite element unit and material parameters; dividing finite element meshes by adopting multiple methods; setting seabed boundary conditions and voltage and current loads; analyzing temperature distribution data and a time varying rule after the earth faults occur. According to the technical scheme, the defects of a full-scale experiment that experimental cost is high, implementation is difficult to realize, data are difficult to acquire and the like are effectively overcome, simulation of the earth faults of the undersea cable is efficiently realized, and temperature distribution and the time varying rule of all layers of structures of the undersea cable when the faults occur are obtained; in addition, convenience and quickness in calculation and analysis are realized.

The invention discloses a cable collecting and releasing mechanism of a feed cabin of a radio telescope, wherein the feed cabin is hung at the upper part of an antenna through a plurality of suspended cables, the suspended cables bypass the tops of a plurality of supporting towers and are connected with a cable rolling mechanism; the feed cabin is connected with a cable, and through the driving of the cable collecting and releasing mechanism, the cable can be collected and released while the suspended cables move in and out. The cable collecting and releasing mechanism comprises a plurality of detachable rope clips that can be connected with the suspended cables in a cohesion manner or in a disconnected manner, wherein the cable is fixed with the detachable rope clips; one end of a drawing steel wire rope is fixed with the detachable rope clip which is far from the final end of the feed cabin, and the other end thereof is connected with the feed cabin; the detachable rope clips are sequentially connected in series and fixed on the drawing steel wire rope; a cable storage device is arranged around the periphery of two opposite supporting towers, and the detachable rope clips can be stored in the cable storage device; and the supporting tower is provided with a detaching device. The cable collecting and releasing mechanism can effectively protect the cables in the moving process of the feed cabin, thereby prolonging the service life of the cables and improving the stability and convenient maintenance of the mechanism.

The invention discloses a pulse signal collecting device (100) and a pressure distribution testing device (11), which comprise a pressure distribution testing device (11) and a control device (12) forcollecting with a plurality of pressure sensors (111), and the pressure sensor (111) corresponds to a plurality of acquisition regions of the human body to be measured, and the pulse signal is outputto the control device (12) A plurality of pressure information of the monitoring points as a pulse signal; and a control device (12) constructing a pressure distribution model of the pulse signal ofthe human body to be measured according to a plurality of pressure information. The pulse signal collecting device (100) can obtain a pulse signal with abundant information.

The invention discloses a grid equivalent method based on phase angle difference of call lines. The grid equivalent method particularly comprises the steps of dividing a grid into a plurality of sub-grids, obtaining approximate load flow solvability of the grid by means of a direct-current load flow method, calculating line power of the call lines among the sub-grids on the basis of the approximate load flow solvability, and equalizing the line power onto boundary nodes of a network needing retaining in a mode of power injection. By means of the direct-current load flow method, the approximate load flow solvability of the grid can be obtained under most of the conditions, the equivalent scheme does not depend on an accurate load flow result of the grid, and therefore, approximate static equivalence can be achieved under the conditions that load flow calculation of the grid is not convergent. In addition, an established equivalent model is good in equivalent accuracy.

The present invention relates to a solid rocket motor seal life prediction method based on a seal life cycle. The method specifically comprises: 1) determining an aging model under a rubber normal temperature; 2) determining a compression deformation rate after a rubber seal ring is aged; 3) determining a compression deformation rate after the rubber seal ring is aged and rebound; 4) determining an engineering stress of the rubber seal ring when a solid rocker motor is operated; 5) determining a life prediction model of the solid rocket motor based on a seal life cycle; and 6) determining aging storage time under a maximum allowable leak rate. According to the method, on the basis of a rubber aging model, a relation between a seal ring compression permanent deformation rate and a compression deformation rate, a simplified seal ring rebound model, a rubber Mooney-Rivlin model and an asbestos rubber leakage rate model, the storage life of the solid rocket motor can be effectively predicted, maintenance of the stored solid rocket motor is facilitated, and secure and reliable operation of the solid rocket motor is ensured.