83results about How to "Solve measurement difficulties" patented technology

The invention provides a simulation method for residual stress prediction of micro-milling nickel-based superalloy, belongs to the field of finite element simulation cutting, and relates to a finite element simulation method for residual stress prediction analysis in the cutting processing process of difficult-to-process materials of the nickel-based superalloy. According to the simulation method, the finite element simulation method is used; the elastic-plastic constitutive relationship of materials is considered; and a Johnson-Cook fracture failure criterion is used for judging the failure, so that residual stress prediction values under different cutting parameters can be obtained. A micro-milling cutter for experiments is shot into a picture through a scanning electron microscope; the picture is drawn into a micro-milling cutter solid model through software; a three-dimensional processed workpiece model is built; and the model is subjected to lattice division. The method has the advantages that the surface residual stress can be measured, and the residual stress in the depth direction can also be measured, so that the problem of measurement difficulty of the residual stress in the depth direction in the measurement process is solved. The cost is reduced, and the labor is saved. In a prediction model, the cutting parameters are variable; and the prediction on the surface residual stress of the difficult-to-process materials is effectively realized.

The invention is a method which surveys the coagulation status and its relevant time of annular cement under high pressure and high temperature, while simulating different depths and static conditions. It is adaptive to activities such as petroleum well and gas well reinforcement, squeezing cement, pouring cement seal and leakage repairing. The invention provides with the ability of surveying starting and ending time of different coagulation periods, in cement liquor under high temperature and high pressure, by surveying the variation of heat released by cement hydrating. First pre-heat the kettle to a experiment temperature, then put in it with a cup filled with prepared cement liquor in a reactor, seal reactor and increase the pressure to experiment value after the temperature is stable both outside and inside; initiate data processing system so to record the temperature variation automatically with a computer; finally figure out the coagulation starting and ending time by time-temperature curve line. The problem that surveying is difficult under high temperature and high pressure, is resolved with the invention which is adopted with the indirect contacting continuous survey of temperature variation.

The invention discloses a soft soil area underground continuous wall leakage detecting system, solves such defects as complex construction, difficult measurement and lower accuracy of measured results, and measures specific positions of leakage points more accurately. The transport process of underground ions and the gathering process of the underground ions are observed in real time, so that the specific positions of the leakage points can be obtained more quickly and accurately. The soft soil area underground continuous wall leakage detecting system relates to a underground continuous wall, an observation well, a precipitation well, a soft soil layer, an aluminum electrode, an electrifying device, an electrifying device positive pole, an electrifying device negative pole, an in-pit ground, an out-pit ground, the leakage points, aluminum ions, a sampling device, a slide cover, a bracket, an opening cylinder, a gauze, a separation plate, a round hole, a sensor, a circuit, a circuit fixator, a circuit negative pole and an acquiring system. The underground continuous wall is not limited by thickness and depth. The observation well is used for observing change of an underground water level on the outer side of a foundation pit; the gap and the depth of the observation well are determined according to actual engineering; and the observation well also can serve as a foundation pit outer side precipitation well. The precipitation well is a foundation pit inner side precipitation well, and can be used for observing a underground water level on the inner side of the foundation pit. The soft soil layer is a soil layer suitable for an electroosmosis method.

The invention relates to a gas permeability characteristic parameter test device and a method for measuring gas permeability characteristic parameters of a micro-nano porous material by utilizing the test device, in particular to a high-temperature gas permeability characteristic parameter test device and a method for measuring the high-temperature gas permeability characteristic parameters of a porous material by utilizing the test device, aiming at solving the problems of the existing method for measuring the gas permeability characteristic parameters of the micro-nano porous material that the gas permeability characteristic parameters are difficult to measure and the error of the measurement data is large because the permeation flow of the micro-nano porous material is small at the room temperature and the measurement of the gas permeability characteristic parameters of the micro-nano porous material is limited at the high temperature. The gas permeability characteristic parameter test device comprises a vacuum pump, a valve air source, a heater, an experiment cylinder, a pressure sensor, a cover plate, a sample platform, an isolation plate and a pipe barrel; the gas permeability characteristic parameters of the micro-nano porous material at the room temperature and high temperature are calculated according to the formulas (in the specification). The gas permeability characteristic parameter test device is applicable to the method for measuring the gas permeability characteristic parameters of the micro-nano porous material.

The invention discloses a hydraulic pressure breaking hammer selector valve and a manufacturing method thereof in the technical field of hydraulic components. The hydraulic breaking hammer selector valve takes a middle cylinder body as a valve body; a valve opening is formed on the valve body; an oil duct is communicated with the inner wall of the valve hole and led to a cylinder of the middle cylinder body; a valve jacket is arranged in the valve hole and matched with the valve hole; a valve plug is arranged in the valve jacket; and a valve cover is arranged on the end part of the valve hole. The selector valve is characterized in that the valve hole is an unthreaded hole; an annular groove is formed on the outer wall of the valve jacket corresponding to the position of an opening of the oil duct; and an oil hole communicates the annular groove with a centre hole of the valve jacket. The manufacturing method comprises the steps of processing the valve hole, the valve jacket, the valve plug and the valve cover; conducting heat treatment; and assembling finished products. The method of the hydraulic pressure breaking hammer selector valve has the advantages of processing conveniently, reducing processing difficulty and effectively ensuring precision. The selector valve has the advantages of high functional reliability, lower processing cost and suitability for batch production.

The invention discloses a method for selecting a smoke gas average flow rate measure point of a desulfurized flue gas online monitoring system of a coal-fired power plant, and relates to a method for selecting a flue gas flow rate measure point. Particularly, the invention relates to a method for selecting the smoke gas average flow rate measure point of the desulfurized flue gas online monitoring system of the coal-fired power plant, which is used for solving the problems that the fluctuation of flow value is big and the flow can not be sampled and metered easily as the large centrifugal force caused by the air flow in the mixed flue is extremely unstable and relatively complex when a sampling point of the desulfurized flue gas parameter of the existing coal-fired power plant is displaced to a level smoke flue of a mixed flue at the inlet of a chimney. The method of selecting the smoke gas average flow measure point particularly comprises the following steps: step one, determining the average flow rate of the smoke gas in the flue; step two, seeking for the average flow rate representing point from the mixed flue; step three, verifying the relative stability of the average flow rate representing point. According to the method, the smoke gas average flow rate measure point of the desulfurized flue gas online monitoring system of the coal-fired power plant is selected and the smoke gas online monitoring system can collect data conveniently.

The invention discloses a device for testing the supercritical water fluidized bed two-phase flow and the heat-transfer characteristic. The device consists of a main circulation system and an auxiliary circulation system, wherein the main circulation system comprises a first water tank; the first water tank is connected with a pulse damper by two plunger pumps connected in parallel; the first water tank is also connected with two reverse-flow regenerators in series; a cold fluid outlet of the second reverse-flow regenerator is connected with a preheater; a spiral pipe heater is respectively connected with a fluidized bed test section A and a fluidized bed test section B; the fluidized bed test section A and the fluidized bed test section B are respectively connected with hot fluid inlets of the two reverse-flow regenerators; two hot fluid outlets are respectively connected with a counterbalance valve after passing by reverse-flow coolers, filters, flow regulating valves and mass flowmeters in sequence; temperature control thermocouples are arranged on an outlet and an inlet of the test section A and the test section B; differential pressure pickups and temperature thermocouples are arranged in the sections; the auxiliary circulation system comprises a second water tank; the second water tank is connected with two reverse-flow coolers by a circulation cooling water pump in series; the second reverse-flow cooler reflows to the second water tank by a cooling tower.

The invention discloses a deformed cylindrical section straightening device which comprises a frame, two correction components and a control system, wherein the two correction components are in the mirror symmetry, and each correction component comprises a guiding frame and a driving cylinder; one end of each guiding frame is hinged on the frame; the surface facing to a corrected deformed cylindrical section, of each guiding frame, is an arc surface matched with the excircle of the deformed cylindrical section; one end of each driving cylinder is hinged with the frame, and the other end of the driving cylinder is hinged with one side far away from the corrected cylinder joint, of the guiding frame; and the control system is electrically connected with the driving cylinders respectively. The deformed cylindrical section straightening device has simple, reasonable and compact structure, overcomes many disadvantages of the prior art and realizes the mechanical adjustment of the roundness of the deformed cylindrical section; and by adopting the deformed cylindrical section straightening device, the degree of automation of the equipment and the adjustment precision of the roundness of the cylinder joint can be increased, the working efficiency of correction can be increased, and wastes can be reduced.

The invention relates to a laser far field divergence angle measurement method and device in satellite laser ranging, and belongs to the field of optical technologies. The device comprises a laser emitting system, a spot imaging system and an image processing system. The laser emitting system comprises a laser, a laser beam expanding optical path, a telescope and a hole limiting plate. The laser beam expanding optical path is composed of a negative lens and a positive lens. The spot imaging system comprises a ground glass screen, an imaging lens set and a high-resolution CMOS camera. The image processing system comprises an image acquisition card, an image processing module and a data processing module. According to the invention, compared with a traditional method, the laser far field laser divergence angle measurement device is more accurate and reliable, solves difficulties of large diameter laser beam divergence angle measurement, uses less equipment to complete the measurement, and has the advantages of being simple, cost saving and easy promotion and application.

The invention provides a method for reconstructing terrains above a dry water level of a beach based on time sequence satellite remote sensing data and water level monitoring data, mainly aiming at the river beach of which the area is greatly changed along with the water level in the year. A river beach boundary line of a time sequence is extracted from an ESA/Sentinel2 remote sensing image, waterlevel observation data of nearest hydrological stations at the upstream and the downstream of the beach at corresponding time are automatically captured, the elevation of a beach water line or elevation information of each feature point of the beach water line is obtained, and terrains above the self-dry water line of the beach are established through spatial interpolation. Under the condition that field measurement is not carried out, existing satellite remote sensing data and water level monitoring data are fully utilized, the invention is suitable for the beach with the area obviously changed due to the influence of water level changes, the beach terrains above the dry water line are established, and the invention has great significance in scour silting analysis, protection, development and utilization of the beach.

The invention discloses a leak point detection method for an underground diaphragm wall in a soft soil area. The defects that construction is complex, measurement is difficult, and the accuracy degree of the measurement result is low are overcome, and meanwhile the specific positions of leak points are measured accurately. The hidden leak points of the underground diaphragm wall in the soft soil area can be accurately detected, and the method is simple and practicable, convenient to operate and short in construction period. In addition, by means of the method, the reinforcement effect can be achieved on soft soil, the water content of the soft soil can be remarkably reduced within a short time, the undrained shear strength of the soft soil is improved, the sensitivity of the soft soil is reduced, and the reinforcement effect of the soft soil is irreversible. A detection device for achieving the detection method comprises an observation well, a precipitation well, aluminum electrodes and a powering-on device. The observation well is located on the outer side of a foundation pit and used for observing changes of the underground water level on the outer side of the foundation pit. The precipitation well is located on the inner side of the foundation pit and used for observing the underground water level on the inner side of the foundation pit. The aluminum electrodes are electrodes needed for an electroosmosis method. The powering-on device is located on the ground and provides a positive power source and a negative power source for the aluminum electrodes.

The invention discloses a data-driven marine diesel engine fault detection method. The method comprises the following steps of clustering working modes of historical data of a diesel engine by adopting a k nearest neighbor clustering method to obtain a working mode type of the diesel engine; establishing a KPI model corresponding to each working mode by adopting a partial least squares regressionmethod PLS, and calculating an inspection threshold value; inputting real-time data to be detected; matching the working modes of the diesel engine by judging whether a distance between a real-time data point to be detected and a clustering center of the historical data is smaller than a preset threshold d or not; inputting to-be-detected data into the KPI model of the corresponding mode, and performing fault test statistics calculation to obtain KPI fault test statistics; and realizing data-driven marine diesel engine fault detection through comparison. By adoption of the technical scheme, real-time, wide-application-range and high-efficiency online fault diagnosis can be achieved.

The invention provides a coriolis acceleration demonstration instrument used for demonstrating a coriolis acceleration phenomenon and calculating coriolis inertia force. The coriolis acceleration demonstration instrument is characterized by comprising a coriolis acceleration demonstration member used for demonstrating the coriolis acceleration phenomenon, a coriolis inertia force measuring member which is connected with the coriolis acceleration demonstration member and is used for measuring magnitude of the coriolis inertia force, and a supporting member used for mounting the coriolis acceleration demonstration member. According to the coriolis acceleration demonstration instrument and a coriolis inertia force measuring method, magnitude of the coriolis inertia force is indirectly measured through an equivalent substitution method, so a problem of difficulty in measuring the coriolis inertia force can be settled, and a coriolis acceleration calculation formula can be further verified.

The invention discloses a measuring scale and a measuring method for an automatically-centralized level gauge. The measuring scale comprises a base, a levelling scale arranged on the base and a level for measuring the verticality of the levelling scale, wherein the levelling scale is located above the base, and the bottom of the levelling scale is arranged on the base through a spherical hinge; a spherical hinge head is arranged at the bottom of the levelling scale and is located in the middle of the inner side of the base; the upper part of the base is provided with a spherical groove in which the spherical hinge head is clamped; the spherical hinge head and the base are locked and fixed by a locking piece. The measuring method comprises the following steps: 1, mounting the measuring scale, to be specific, respectively mounting a measuring scale on a known elevation point A and a point B to be measured according to the following processes: placing the measuring scales, adjusting the verticality of the levelling scale and locking and fixing the levelling scale; 2, mounting the level, to be specific, erecting the level between the two measuring scales; 3, carrying out level measurement. The measuring scale and the measuring method disclosed by the invention are reasonable in design, simple and convenient to operate, good in use effect and capable of effectively improving the efficiency and the precision of the level measurement.

The invention relates to a device and a method for measuring a water and soil characteristic curve under dry and wet circulation. The device comprises an experiment part, wherein the experiment part is arranged in Micro-CT detection equipment; the experiment part comprises a soil sample chamber, a suction force applying part and a connecting pipeline; a first base is arranged at the bottom part ofthe soil sample chamber; the suction force applying part comprises a water storage chamber, an organic glass tube and a second base; the organic glass tube is connected below the water storage chamber through a valve; the second base is arranged under the organic glass tube, and is connected with the first base through the connecting pipeline; the suction force applying part is fixedly connectedwith a fixture on an iron stand through the iron stand; a laser displacement meter is arranged on the iron stand, and is used for measuring the change of water level in the organic glass tube.

This invention discloses a combustor with several entrances for solid fuel, and its application. The combustor comprises an outer nozzle, a middle nozzle, an inner nozzle, ducts connected with the above nozzles, and two or more branch ducts for feeding solid fuel through connected with the central duct. The ratio of total cross section area of the branch ducts to the central duct is (1-1.5):1, which can avoid difficult measurement of solid fuel mass flow rate due to large caliber of the duct, and improve the distribution uniformity and flow stability of high-concentration solid fuel at duct cross section. The combustor has such advantages as convenient control over mass flow rate, simple structure, convenient production and maintenance, and wide applications, and can be used for producing synthesis gas from solid carbon-containing substances by partial oxidation.

The invention discloses a device for testing multi-phase flow and heat transfer characteristics of a supercritical water circulating fluidized bed, which consists of an experimental section, a circulating system and a testing system, and comprises a lifting pipe, a cyclone separator, a filter, a feeding bin, a vertical pipe, an L-shaped material return valve, a circulating water tank, a first plunger pump, a second plunger pump, a damping buffer, a flowmeter, a first heat regenerator, a second heat regenerator, a first heater, a second heater, a back pressure valve, a cooling water tank, a cooling water pump, a first cooler, a second cooler, an open cooling tower, a plurality of regulating valves and other parts, and a plurality of K-type thermocouples, pressure difference sensors, capacitance probes and other testing devices. The device for testing multi-phase flow and heat transfer characteristics of the supercritical water circulating fluidized bed lays a foundation for research onthe multi-phase flow and heat transfer characteristics of the supercritical water circulating fluidized bed reactor, establishment of design theory, optimization of operation conditions and popularization of application.

Disclosed are a measuring device of the cross-section temperature field of a circular steel tube concrete column and a mounting method thereof. The measuring device is composed of a main bar, branch bars, a stabilizing bar, steel bars and thermal couples. The main bar is connected with the branch bars perpendicularly, the branch bars are divided into three groups, and the other end of every group of the branch bars is connected into a whole through the stabilizing bar. The main bar, the branch bars and the stabilizing bar are formed by pouring cement mortar. Steel bars are pre-embedded inside the main bar, and the thermal couples are pre-embedded inside the branch bars. When the measuring device is mounted, the end portions of an inner-layer circular steel tube are provided with two grooves, the end portions of an outer-layer circular steel tube are provided with two round holes, the center line of grooves is aligned with that of the round holes, the measuring device is inserted inside the grooves of the inner-layer circular steel tube, the grooves on the inner-layer circular steel tube are sealed by welding small steel plates, and concrete is poured to the column end. The measuring device of the cross-section temperature field of the circular steel tube concrete column is simple in structure, accurate in location, good in economic efficiency and capable of well measuring the cross-section temperature field of the circular steel tube concrete column in a fire test.

The invention discloses a grid-connected system short circuit ratio measurement method and device based on fundamental wave impedance identification. The grid-connected system short-circuit ratio measuring device based on fundamental wave impedance identification comprises a master grid-connected inverter, a short-circuit ratio calculating unit, a slave grid-connected inverter and a weak power grid. Specific operation process of the experimental device for measuring the short circuit ratio of the grid-connected system is as follows: the disturbance injection unit injects disturbance signals into the grid-connected inverter, current response signals and voltage response signals of a common coupling point PCC are collected through the grid-connected current sensor Hig and the grid-connectedvoltage sensor Hug respectively, fundamental wave impedance is obtained through the fundamental wave impedance identification unit, and then the short-circuit ratio of the system is obtained through calculation. The experimental device can accurately and reliably calculate the short circuit ratio of the grid-connected system, so that the experimental device is applied to stability judgment and self-adaptive control of the grid-connected system, and the stability of the grid-connected system is improved.

The invention belongs to a processing technology for a precision component made of special material, and relates to a processing method for high-precision benchmark conversion of parts made of soft magnetic alloy. An auxiliary positioning tool is arranged, and the problem of mutual verticality of a plurality of surfaces can be solved; a high-precision benchmark block is matched for conversion of measurement benchmarks, and the problem that actual processing dimensions cannot be determined easily can be solved; the tool is adopted for conversion of the processing benchmarks, a processing supply terminal is arranged, and the defects that each part needs to be centered and measured each time when being processed can be overcome; and moreover, magnetic weakening can be avoided through optimizing processing parameters and selecting reasonable sand wheels and cooling methods. Compared with the conventional processing method, the problems of the traditional method that the parts cannot be clamped and positioned easily and need to be clamped and centered multiple times during processing can be solved; high position accuracy and dimensional accuracy of side faces can be guaranteed at the same time; and the processing efficiency can be increased greatly, good dimensional consistency can be maintained, and the processing quality can be stabilized.

The invention discloses a wave-measuring system and measuring method based on a navigation mark body. The measuring system comprises a navigation mark body floating on the sea level, wherein a machinebox and a three-shaft magnetic force sensor fixed through a horizontal fixing plate are arranged in the navigation mark body; four tube measuring modules are arranged on the periphery of the outer bottom surface of the tube of the navigation mark body in a uniform distribution way; the axial line of the module tube is parallel to the axial line of the tube body of the navigation mark body; each measuring module respectively comprises one three-shaft acceleration sensor, one three-shaft angle speed sensor and a pressure sensor; a communication module, a control module, an operation module, a storage module, a GPS module and a power supply module are arranged in the machine box. According to the measuring method, the dynamic data of the navigation mark body per se under the wave effect andthe change dynamic data of the navigation mark body immersion depth are measured; after the two parts of data are accurately metered, the data is synchronously combined so as to obtain the wave real operation condition dynamic data. The measuring difficulty caused by nonuniformity of the motion law and the sea waves of a buoy wavemeter can be overcome; the measurement is more accurate.

The invention discloses a construction method for boring of an extra large diameter pile foundation in a dangerous landform region of a mountainous area. According to the method, aerial photography with an unmanned aerial vehicle, the BIM technology and a digital map are used, so that the problem that measurement of the dangerous landform construction region of the mountainous area is difficult iseffectively solved, and more accurate and visual data are provided for onsite construction planning; and then a small rotary drilling rig is used for drilling a plurality of reasonably-arranged smallholes at first, backfilling is carried out, then manual hole digging is conducted, and slag removing and boring are carried out. A feasible technological means is provided for boring of the moderately weathered rock large diameter pile foundation which has high environment protection requirements, cannot allow blasting method excavation, does not have a large equipment entering condition and hashigh excavation difficulty. In addition, manual excavation difficulty is reduced, the manual excavation speed of the pile foundation under the special environment is increased, and the boring qualityof the pile foundation is guaranteed.

The invention discloses a determination technology of height anomaly, and belongs to the field of surveying and plotting. The determination method of height anomaly includes acquiring the present latitude and longitude information of the equipment; determining the corresponding first object node according to the acquired latitude and longitude information in the preset height anomaly node lookup table; acquiring a height anomaly of the first object node, a height anomaly of a second object node having the preset spacing distance with the first object node, and the corresponding latitude and longitude information from the height anomaly node lookup table; calculating fitting parameter value of the polynomial surface according to the acquired height anomaly, latitude and longitude information and the present polynomial surface formula; and calculating the height anomaly of the latitude and longitude information according to the latitude and longitude information, the polynomial surface formula and the fitting parameter value. The invention also discloses a determination device of height anomaly. The determination technology of height anomaly provided by the invention can overcome the problems of determination difficulty and low precision of height anomaly in the GPS plotting engineering.

The invention relates to a drainage pumping station water pump operation performance determining method and equipment. The determining method comprises the following steps: S1: loading rated drainage volumes of water pumps within a set time period; S2: collecting the actual drainage volumes of the water pumps within the set time period; S3: determining the operation performance of the water pumps and generating related coefficients according to the actual drainage volumes and the rated drainage volumes; S4: displaying the determination results to maintenance staff in a visible manner. Compared with the prior art, the method provided by the invention has the advantages as follows: the operation performance of the water pumps is determined by calculating the related coefficients according to the actual drainage volumes of the water pumps, collected within the set time period, and the rated drainage volumes, so that the determination results can reflect the operation states of the water pumps more objectively; besides, the determination results are displayed to the maintenance staff in a visible manner, so that the displayed results are more visual, and the experience of maintenance staff is better.