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1161 results about "Field tests" patented technology

Microbial enhanced oil recovering method of moderate-high permeability reservoir

ActiveCN104453811ADetermine the injection volumeDetermine the injection rateMicrobiological testing/measurementFluid removalField testsOperability
The invention discloses a microbial enhanced oil recovering method of a moderate-high permeability reservoir. The method particularly comprises the following steps of carrying out field sampling on a tested oil reservoir; analyzing function microorganisms in the oil reservoir and screening an endogenesis activator; screening exogenous function microorganisms; optimizing field injection process parameters; carrying out field implementation and effect tracking and evaluating. The microbial enhanced oil recovering method has the advantages of being wide in oil reservoir range and high in pertinence and operability. The endogenesis activator or the exogenous function microorganisms are selected according to the specific oil reservoir, field injection process parameters are optimized by utilizing physical simulation experiments, the field test effect is obvious, and the accuracy and practically of the process parameter optimizing result are improved by combination physical simulation and field tests, so that the field implementation effect of displacement of reservoir oil through the microorganisms is improved. Therefore, the microbial enhanced oil recovering method of the medium-high permeability oil reservoir can be widely applied to the field tests for enhancing the oil recovery of the medium-high permeability oil reservoir.
Owner:CHINA PETROLEUM & CHEM CORP +1

SOC and SOT combined state estimation method based on power battery electric-thermal coupling model

ActiveCN108333528AHigh precisionAccurately obtain electrical and thermal characteristicsElectrical testingElectricityPower battery
The invention relates to an SOC and SOT combined state estimation method based on a power battery electric-thermal coupling model, and belongs to the technical field of battery management. The methodcomprises the steps of selecting a to-be-measured power battery, building the electric-thermal model of the power battery, and determining parameters needed for estimating the SOC and the SOT of the power battery; under different temperatures, conducting trickling charging-discharging experiments and HPPC experiments on the measured power battery, building a database of equivalent circuit model parameters relevant to the temperature and the SOC under a charging and discharging condition, and simulating field test working conditions under different road conditions to build the database; conducting parameter identification to obtain characteristic parameters of the electric-thermal model, and obtaining the quantitative relation between the equivalent circuit model parameters and the temperature and the SOC under the charging and discharging condition. By means of the SOC and SOT combined state estimation method based on the power battery electric-thermal coupling model, the model is combined with a PF algorithm and the quantitative relation of the equivalent circuit model parameters relevant to the temperature and the SOC under the charging and discharging condition of the power battery to achieve the SOC and SOT combined state estimation of the power battery.
Owner:CHONGQING UNIV

Method for correcting near-field test phases of millimeter wave plane

The invention provides a method for correcting near-field test phases of a millimeter wave plane. The method comprises the steps that step 1, a set XY plane is scanned and four points in a zone with strong signals are selected to serve as phase sampling points; step 2, preset periods are set, plane scanning is conducted on the four points, and collection moments, collection data and collection positions of the four points in each period are determined; step 3, according to data variable quantity of the selected four points, the phase of each point in the scanned plane is corrected; step 4, Fourier transform is conducted on the corrected data of the whole scanned plane, far-field data are calculated through near-field data, and the near-field far-field transformation formula is . According to the technical scheme, a function relationship, corresponding to the sampling points, of phase drift and time is established through the method that the positions of the appointed sampling points on the scanned plane and the sampling data in the positions are recorded, phase compensation of the data of the whole scanned plane is achieved through the interpolation mode, and therefore the measurement accuracy of a near-field measurement system under a millimeter wave frequency band is improved.
Owner:THE 41ST INST OF CHINA ELECTRONICS TECH GRP

Whole-field testing method for internal flow of drip emitter maze flow channel

The invention discloses a whole-field testing method for the internal flow of a drip emitter maze flow channel, which belongs to the technical field of detection. Firstly, a transparent cylindrical drip emitter flow channel model and an internal flow rate testing system of the drip emitter maze flow channel are constructed, and water flow moving action is represented by the following movement of a tracer particle and a DPIV system on the basis of tracer fluorescent particles; and by a laser beam illumination flow field, a CCD camera is used for continuously shooting pictures of the flow field, and related computation is carried out on two continuous frames of particle pictures so as to obtain the characteristic parameters of the speed flow field. The invention utilizes a microscope objective to modify a conventional CCD camera so as to successfully solve the contradiction between the shooting area and the image resolution of the internal fluid flow of the critical scale of the drip emitter flow channel and successfully realize the two-dimensional whole-field and quasi-three-dimensional local undisturbed test of the internal flow field of the drip emitter flow channel. The invention has the flowing characteristics of the maze flow channel and the characteristic of being consistent with the whole-field test result display of the existing numerical simulation and water flow movement.
Owner:CHINA AGRI UNIV

Nondestructive examination device and method of crack defects of inner surface of underground foundation embedded section of electric pole

The invention provides a nondestructive examination device of crack defects of the inner surface of an underground foundation embedded section of a reinforced concrete electric pole, which comprises asupporting sleeve and an autoscope system. The invention also provides a nondestructive examination device of the crack defects of the inner surface of the underground foundation embedded section ofthe reinforced concrete electric pole, which comprises the following steps: extending a flexible electronic video industrial autoscope into the electric pole through a drain hole of the electric poleby using the supporting sleeve, and positioning the flexible electronic video industrial autoscope at the axes of the electric pole; realizing movements in vertical direction and rotating direction through external control by an autoscope probe, and transmitting the collected image of the inner surface of the electric pole to an external video monitor so that detection staffs can observe and judgethe crack defects. The invention has convenient field test operation without dismantling the electric pole and is suitable to the safety operation maintenance of various electric poles in an overheadpower transmission line project.
Owner:CHINA THREE GORGES UNIV

System and method for testing comprehensive heat conductivity coefficient and specific heat capacity of rock-soil body

InactiveCN102879425AOvercome disturbanceOvercome destructionMaterial heat developmentThermal response testStructure of the Earth
The invention relates to a system for testing the comprehensive heat conductivity coefficient and specific heat capacity of a rock-soil body. The system comprises a heating device and a measuring device, wherein the heating device comprises a heat preservation water tank, an electrical heating rod, a water pump, a heat preservation water inlet pipe, a heat preservation water return pipe, a heat exchanger tube and a balance valve, and the measuring device comprises a rock-soil body temperature sensor, a fluid temperature sensor and a flowmeter. The electrical heating rod is arranged in the heat preservation water tank, the water pump is arranged on the water inlet pipe, the flowmeter and the balance valve are arranged on the water return pipe, and the two ends of the heat exchanger tube are respectively connected with the water inlet pipe and the water return pipe. The invention simultaneously discloses a testing method of the system for testing. With the system, the disturbance and damage which are caused by a laboratory test method to the original structure of the rock-soil body are overcome; the defect that a heat probe method is not long enough is overcome; and the defect that the convention vertical buried pipe rock-soil thermal response test cannot test the thermal-physical characteristic parameters of all the layers of the rock-soil bodies is made up. The system is simple and easy to operate during field tests, and is low in cost. The thermal-physical characteristic parameters which are obtained through utilizing the theory to invert are accurate and reliable.
Owner:SOUTHEAST UNIV

Testing method for shielding effectiveness of small-size shielding cavity

The invention discloses a testing method for the shielding effectiveness of a small-size shielding cavity. The testing method is characterized in that a shielding anechoic chamber and a shielding chamber are two cavities formed by separation through a metal wall plate; a wave absorbing material is arranged on the wall surface of the shielding anechoic chamber; the shielding anechoic chamber and the shielding chamber are independently grounded; a receiver is arranged in the shielding chamber; other devices are arranged in the shielding anechoic chamber; a bidirectional radio frequency connector is arranged on the wall surface of the metal wall plate; a near-field test antenna is arranged in the shielding anechoic chamber and is sequentially conducted with the bidirectional radio frequency connector and the receiver which are arranged on the wall surface of the metal wall plate through a coaxial cable; a transmitting antenna is sequentially conducted with a pre-amplifier and a signal source through a coaxial cable; the transmitting antenna, the pre-amplifier and the signal source are arranged in the shielding chamber; the center of the transmitting antenna corresponds to the center of the near-field test antenna; and the testing method is realized by three steps of measuring a direct-connection receiving value and a radio frequency leakage quantity and calculating the shielding effectiveness. The testing method is simple and accurate.
Owner:XIAN KAIRONG ELECTRONICS TECH

Mutual information-based topology estimation method and system for low-voltage distribution network users

ActiveCN109274095ARaise the estimated rateNo field test wiring problemsAc network circuit arrangementsCluster algorithmTransformer
The invention discloses a low-voltage distribution network user topology estimation method and system based on mutual information, wherein, the method comprises the following steps: step S1, obtaininguser voltage time series data and transformer voltage time series data; step S2, obtaining user voltage time series data and transformer voltage time series data. 2, calculate mutual information between user voltage and mutual information between user and transformer accord to time series data of user voltage and time series data of transformer voltage; Step S3, according to the mutual information between the user and the transformer, the user phase identification is carried out according to the K-means clustering algorithm; 4, construct a topology model; Step S5, the topology estimation is completed according to the mutual information between the user voltages by using the minimum spanning tree algorithm for the user after the phase identification. Compared with the prior art, the invention does not rely on the known topology, does not need additional carrier wave, is not affected by the load of the distribution station area, has no field test wiring problem, does not exist securityhidden trouble, and improves the speed of topology estimation.
Owner:东北大学秦皇岛分校

Secondary cooling water amplitude-cutting control method of slab continuous casting machine

ActiveCN102430733AAvoid the third brittle temperature zoneSlab casterField tests
The invention provides a method for carrying out online automatic accurate amplitude-cutting control on spraying width of secondary cooling water of a wide and thick slab, belonging to the technical field of control over cooling water for continuous casting and aiming at overcoming the defects of large engineering modification of a cooling water supply loop, higher cost or poorer control precision of manually adjusting spraying width and the like existing in the prior art. The method mainly comprises the following steps of: taking secondary cooling water spraying widths of different steel types and different width specifications of casting blanks, which are determined through temperature field simulation computation of secondary cooling water regions of the casting blanks and field tests,as references, driving a guide device mainly consisting of a support frame and a collecting guide pipe to collect and guide out redundant cooling water which is sprayed from spray pipes at edge partsof rows of the inner arc of the sector section so as to realize online accurate amplitude-cutting to spraying width of the secondary cooling water of the inner arc of the sector section. Due to adoption of the method disclosed by the invention, temperature of the corner of a continuous casting blank can be stably controlled at 870-900 DEG C, a third brittleness temperature region of steel is effectively avoided, the micro transverse crack defect rate of the corner of the micro alloy steel continuous casting blank is controlled within 1 percent.
Owner:TIANJIN IRON & STEEL GRP

Method for predicting and controlling steam temperatures of boilers on basis of state observation model

ActiveCN103676651AReduced need for field trialsImprove object propertiesAdaptive controlControl signalMathematical model
The invention relates to a method for predicting and controlling steam temperatures of boilers on the basis of a state observation model. The method includes 1, replacing heat exchangers by multiple sections of concentration parameter links by a principle of natural segmentation or virtual segmentation, and using outlet parameters of media of various sections as representative parameters of the concentration links to build a mathematical model of enthalpy and temperature channels of the heat exchangers; 2, creating a state observer on the basis of output feedback and estimating outlet temperatures of the various sections; 3, connecting an MPC (multivariate model prediction controller) and a PID (proportion, integration and differentiation) regulator in a cascade manner to form a serial control circuit, acquiring step response coefficients according to the model of the enthalpy and temperature channels of the heat exchangers and acquiring set values of lead temperatures; 4, regulating the steam temperatures by the inner-loop PID regulator according to difference among the lead temperatures and output of the MPC and acquiring control signals of attemperation water valves. The method has the advantages that model building and verification are carried out, so that field test requirements can be reduced; states of inertial and lagged controlled objects are reconstructed via the state observer, so that characteristics of the objects can be modified; prediction and control are implemented, so that targets can be accurately and quickly controlled.
Owner:STATE GRID CORP OF CHINA +2
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