1690 results about "Pressure measurement" patented technology

The invention provides a calibration method and system for measurement data of a pressure sensor, and the method comprises the steps: obtaining an original output signal of the pressure sensor and synchronous collection data of environment parameters, and carrying out the preprocessing, and obtaining multi-source sensing data and dynamic environment characteristics; based on multi-source sensing data and dynamic environment characteristics, a multi-error coupled comprehensive error model is constructed, and a dynamic compensation coefficient is generated through online parameter identification; according to the dynamic compensation coefficient and a preset confidence evaluation strategy, dynamic compensation calibration is carried out on the sensing data, a high-precision pressure value is generated, and the high-precision pressure value is used for representing a real environment pressure measurement value. By adopting the method, the accuracy and the reliability of the tester in the calibration of the pressure sensor in a multi-error coexistence and complex environment can be improved, and the precision and the stability of the measurement data calibration of the pressure sensor are improved.

The invention provides an intelligent pressure sensor temperature compensation system, and relates to the technical field of pressure sensors, and the system comprises a hardware sensing module which comprises an elastic sensitive element and is used for reducing the temperature drift magnitude of a pressure sensor; the environment data acquisition module comprises a flexible thermoelectric sensor array and is used for acquiring temperature and humidity data; the humidity correction module is used for integrating a dynamic humidity correction algorithm and establishing a cross-sensitive matrix model to correct the original signal to generate a first pressure correction signal; the temperature compensation module is used for carrying an incremental neural compensation network and constructing a compensation model to perform temperature compensation on the first pressure correction signal to generate a second pressure compensation signal; and the fault compensation module is used for triggering a digital twinborn compensation model to perform fault compensation on the second pressure compensation signal to generate a target pressure output signal when a fault of the single sensor is monitored, so that the pressure measurement error in the whole temperature range can be accurately controlled, and the environmental adaptability and the intelligent level of the system are improved.

The invention provides a dynamic monitoring method for a soil mass seepage field of a power transmission tower slope. According to the method, related data of the slope are acquired through multi-source data acquisition and technologies of pressure sensing and static pressure measurement, displacement monitoring, multi-sensor fusion, Beidou / GPS positioning, resistivity method exploration, soil moisture content monitoring and the like; fusing the collected multi-source data, analyzing the dynamic change of the seepage field by using a risk assessment model and a machine learning algorithm, and predicting the evolution trend of the seepage field; a lightweight model is deployed at a monitoring terminal to realize local rapid processing of data, alarm information is immediately sent out once an abnormal state is monitored, and scientific and reasonable decision support is provided for protection and treatment of a transmission tower slope according to early warning information in combination with a pre-made decision scheme; according to the invention, the accuracy and timeliness of transmission tower slope soil seepage field monitoring can be effectively improved, and the threat of landslide and other disasters to a transmission line is reduced.

The invention discloses an anti-seismic and anti-power-frequency-interference system and method for a vortex shedding flowmeter, and relates to the technical field of flow measurement, the system comprises a signal receiving module, a vibration monitoring module, a frequency identification module, a temperature and pressure measurement module and an interference signal processing module, interference signals in a flow-free state can be accurately processed, whether actual flow exists or not can be accurately judged by measuring the temperature and pressure of fluid in a pipeline and combining the temperature and pressure with vibration and frequency characteristic information, wrong measurement data generated due to the interference signals in the flow-free state are avoided, and the measurement accuracy is improved. According to the method and the system, the measurement problem caused by misjudgment can be reduced, meanwhile, information about the equipment operation state and the pipeline environment is provided for different types of interference signals through comprehensive analysis and judgment of the system, potential equipment faults and abnormal working conditions can be found in time, and a powerful data basis is provided for maintenance and management of the equipment.

The invention discloses a carbon dioxide booster pump control system and method, particularly relates to the technical field of carbon dioxide booster pump control, and aims at transient interference pulses caused by starting and stopping of a pump body in the batch production process, millisecond-level timestamp mapping is adopted to achieve interference and steady-state pulse separation. Performing sliding median filtering on the steady-state pulse, extracting a window center peak value, and performing incremental accumulation in sequence to obtain operation accumulated flow in real time; based on the last peak time label, synchronously collecting temperature and pressure measurement values, generating a correction amount through a predefined temperature correction function and a user-defined pressure correction function, adding the correction amount according to a fixed weight, and converting the correction amount into a compensation pulse count through pulse-volume conversion to correct an accumulated error; high-precision flow metering and compensation are achieved through the synergistic effect of start-stop interference elimination, filtering peak value extraction and a correction function, and the reliability of a carbon dioxide booster pump control system under the complex working condition is improved.

The invention discloses a data optimization method and device based on cubic spline interpolation, equipment and a medium, and relates to the technical field of data processing, and the method comprises the steps: obtaining the original pressure data of the surface of a wing model after a wind tunnel pressure measurement test is completed, and generating a pressure data matrix based on the original pressure data; calculating a pressure coefficient of each pressure measuring point in the pressure data matrix to obtain a pressure coefficient matrix of all the pressure measuring points, and setting a corresponding attack angle sequence to be interpolated for each pressure measuring point; performing determinant interpolation on the pressure coefficients of the pressure measuring points in the pressure coefficient matrix to the corresponding attack angle sequence to be interpolated by using a cubic spline interpolation method so as to obtain pressure coefficient interpolation results of all the pressure measuring points of the wing model; data optimization is performed on the wind tunnel pressure measurement test by using the pressure coefficient interpolation result, so that the Runge phenomenon caused by a Lagrange high-order interpolation polynomial can be avoided, the problem of data oscillation at the edge of an interpolation interval is solved, the data rounding precision is improved, and technical support is provided for optimization of the wind tunnel pressure measurement test.

The invention relates to the technical field of pressure measurement, in particular to a sensor intelligent compensation method, which comprises the following steps of: firstly, acquiring pressure values of a pressure sensor at different temperatures, and obtaining a pressure curve at each temperature through curve fitting; and then determining local similarity according to the area difference enclosed by the pressure curve at each temperature and the adjacent pressure curve, thereby calculating an initial penalty parameter of the SVR model, and then correcting the initial penalty parameter by analyzing the fluctuation degree of the pressure value at each temperature to obtain a final penalty parameter. And constructing and training an SVR model by using the corrected parameters, and placing the trained model in a compensation module to realize real-time compensation of a pressure value acquired by the pressure sensor. According to the method, the accuracy, the stability and the strain capacity of the SVR model are improved, the local optimal defect is avoided, the measurement error caused by the temperature is accurately compensated, and the measurement precision of the pressure sensor in different temperature scenes is enhanced.

The embodiment of the invention provides a pipeline blockage monitoring method and system for wet metallurgy slurry conveying, and belongs to the technical field of pressure measurement and pipeline blockage monitoring. The method comprises the following steps: collecting multi-point pressure signals along a slurry pipeline, and extracting pressure pulsation amplitudes and phase characteristics in a pump fundamental frequency and frequency multiplication range based on the multi-point pressure signals so as to establish an on-way pulsation transmission sequence; determining equivalent on-way impedance based on comparison between the on-way pulse transmission sequence and a reference working condition, and outputting an initial judgment result for representing a blockage risk; flow temperature and viscosity estimation parameters are introduced based on the initial judgment result to carry out rheological correction on an impedance threshold value, and a high-frequency phase difference is extracted at an elbow section to update a candidate blockage position; and based on the updated candidate blockage position and the corrected impedance threshold, fusing a phase stability index, and generating and outputting a current blockage evaluation result. According to the scheme, early-stage accurate positioning and stable judgment of slurry pipeline blockage can be achieved under complex working conditions.

A subsea wellbore monitoring system of the present disclosure includes hanger, plug, and monitoring assemblies. The hanger assembly installs on landing in the wellhead, engages the lock profile, and has a hanger seal sealing in the wellhead. The plug assembly is supported in the hanger assembly and has a plug seal to seal in the landing. Ports of the plug assembly communicate with a bore envelope and an annulus envelope. The monitoring assembly has pressure monitors that communicate with the ports and measure pressure measurements related to the envelopes. The hanger and plug seals can be elastomeric and / or metal elements. The hanger and plug seals are preferably expandable or can be energized outward so the seals can pass any shoulders and profiles when installed in the wellbore and can then seal against the internal surfaces.

The invention discloses a liquid cooling radiator cooling liquid leakage detection method and system, and relates to the technical field of equipment detection, and the method comprises the steps: obtaining the pressure reading of pressure measurement equipment; according to the pressure reading, the pressure change rate is calculated through differential operation; identifying a starting time point of a leakage event according to the pressure change rate; calculating an inherent response delay of the pressure measurement device; compensating the occurrence time sequence of the leakage event according to the inherent response delay to obtain a compensation time sequence; according to the starting time point and the compensation time sequence, the target leakage point position is determined, cooling liquid leakage detection is achieved, and accuracy is improved.

The invention relates to the technical field of sensor detection, in particular to a comprehensive detection system and method for a petroleum logging sensor. According to the method, the temperature and pressure data in the well logging shaft are obtained, and the temperature change rate and the pressure change rate are calculated, so that the influence of the environment on the measurement data can be accurately evaluated, the compensation of the temperature-pressure coupling influence is further realized, and the measurement precision is remarkably improved. On the basis, the amplitude change and the phase deviation of the measurement signal are further combined, the interference characteristics of the electromagnetic environment on the measurement signal are extracted, and signal optimization is carried out by calculating interference influence parameters, so that the reliability and the anti-interference capability of the measurement data are enhanced. Meanwhile, the influence of load change on the sensor in the logging process is analyzed, the deviation condition of a pressure measurement value is identified, and the measurement error is corrected by using an influence coefficient, so that the measurement data is more stable. Multi-cycle measurement data are compared and analyzed, and the long-term drifting condition of the data can be identified.

The invention relates to the technical field of liquid level meters, in particular to a liquid level measuring instrument for a low-temperature and high-pressure container, and aims to solve the problem that when the liquid level of the low-temperature and high-pressure container is measured, measured data are easy to be wrong due to the influence of the pressure and temperature of a medium. Comprising a pressure measuring container; the liquid level meter comprises a gas phase pipe, a liquid phase pipe and a differential pressure transmitter, and one end of the gas phase pipe and one end of the liquid phase pipe are both communicated with the pressure measuring container; a gas-liquid drainage assembly; the differential pressure transmitter is used for measuring the liquid level in the pressure measuring container through the pressure of gas or liquid in the gas phase pipe and the liquid phase pipe, and the gas-liquid drainage assembly is used for separating gas and liquid in the gas phase pipe or the liquid phase pipe. The gas in the low-temperature and high-pressure container enters the gas phase pipe, the liquid in the low-temperature and high-pressure container enters the liquid phase pipe, the gas-liquid drainage assembly can treat media at the gas phase pipe and the liquid phase pipe respectively, and the problem that the media directly enter the gas phase pipe or the liquid phase pipe, and measurement data are unstable due to factors such as pressure fluctuation is solved.

The invention relates to the field of pressure (0-200 kPa) detection, in particular to an MEMS integrated pressure sensing device or a monolithic integrated multi-frequency capacitive micromachined ultrasonic transducer (CMUTs) for wide-range pressure measurement. According to the monolithic integrated multi-frequency CMUTs, a first CMUTs, a second CMUTs and a third CMUTs are integrated on a chip; by adjusting the diaphragm thickness, cavity height and diaphragm radius of the first, second and third CMUT units and the pressure value in the cavity of the second CMUT unit, the first and second CMUT units work in a linear range of small deflection deformation, and the third CMUT unit works in a linear range of large deflection deformation. And the working ranges of the first CMUT unit, the second CMUT unit and the third CMUT unit form a continuous and complete measurement interval, and the resonant frequencies are not overlapped, so that the integrated pressure sensing device which can be used for 0-200 kPa full-pressure range measurement is realized.

The invention relates to the technical field of medical instruments, and provides a pneumoperitoneum machine pressure measurement abnormity control method which comprises the following steps: acquiring air inlet pressure, pressure measurement pressure and smoke exhaust pressure; calculating a difference value between the air inlet pressure and the pressure measuring pressure and a difference value between the pressure measuring pressure and the smoke exhaust pressure; when the difference value between the air inlet pressure and the pressure measuring pressure is larger than a first preset difference value and smaller than a second preset difference value, and the difference value between the pressure measuring pressure and the smoke discharging pressure is larger than a third preset difference value and smaller than a fourth preset difference value, the pressure measuring pressure is selected as display pressure; otherwise, starting a first pressure measurement abnormity detection program. By monitoring the difference value between the air inlet pressure and the measured pressure and the change of the difference value between the measured pressure and the smoke exhaust pressure, pressure monitoring abnormity caused by equipment faults in the operation process can be recognized, the equipment stability is improved, and the operation risk is reduced.

The utility model provides a guiding device and dilator for improving pressure measurement accuracy, the guiding device comprises a pressure measurement sheath, the pressure measurement sheath comprises a handle and a sheath tube, the size and shape of the sheath tube are suitable for entering a target area in a body through a body lumen, the sheath tube longitudinally extends from a near end to a far end, the sheath tube defines a first lumen suitable for entering of an external instrument, and the first lumen is communicated with the handle. A pressure measuring tube cavity longitudinally extending from the near end to the far end is formed in the tube wall of the sheath tube, a pressure measuring opening used for sensing the pressure of liquid in the body is formed in the far side of the pressure measuring tube cavity, and the dilator is arranged in the first tube cavity in a supporting and penetrating mode so that the pressure measuring sheath can enter the body conveniently. And the dilator is provided with a blocking part for limiting foreign matters from entering the pressure measuring tube cavity through the pressure measuring port.

The invention belongs to the technical field of sensors, and particularly discloses a capacitive sensor based on multistage compression deformation and a preparation method thereof, the capacitive sensor comprises an upper electrode layer and a lower electrode layer; a deformable corrugated structure is arranged between the upper electrode layer and the lower electrode layer, and the deformable corrugated structure comprises three deformation areas with the same structure; the deformation area is internally provided with three cavities, and the three cavities are filled with a first dielectric layer, a second dielectric layer and a third dielectric layer respectively; magnetic adsorption units are arranged on the outer sides of the adjacent deformation areas. According to the capacitive sensor based on multi-stage compression deformation and the preparation method thereof, the sensor realizes wide-range and multi-resolution pressure measurement capability; the sensor can present different sensitivity characteristics in different pressure ranges, can flexibly switch working modes, meets various measurement requirements from low pressure to ultrahigh pressure, and solves the technical problem that a traditional capacitive sensor is difficult to consider wide range and high resolution at the same time.

The invention discloses a continuous force measurement wind tunnel test method based on a differential pressure type pressure scanning valve, and belongs to the technical field of wind tunnel tests. In order to solve the problem that a test result can be introduced by a reference pressure error measured by reference pressure measurement equipment, the method comprises the steps that a differential pressure type pressure scanning valve is installed in an aircraft model, and a reference pressure channel and a last measurement channel of the differential pressure type pressure scanning valve are connected with a wind tunnel plenum chamber static pressure air pipeline; measuring the pressure at the same position with a wind tunnel static pressure sensor; calculating the range of the differential pressure type pressure scanning valve; performing a wind tunnel test, and synchronously acquiring the pressure of each surface pressure measuring hole, the wind tunnel total pressure and the wind tunnel plenum chamber static pressure of the aircraft model in different states; whether the difference value between the wind tunnel plenum chamber static pressure collected by the last channel of the differential pressure type pressure scanning valve and the wind tunnel plenum chamber static pressure collected by the wind tunnel static pressure sensor meets the measurement precision or not is judged based on the range of the differential pressure type pressure scanning valve; and performing test data processing on the effective test data, and calculating the coefficient of the wind tunnel flow field pressure hole.

The invention provides a karst collapse simulation experiment device of a multi-factor action mechanism, and belongs to the field of karst collapse simulation experiments.The karst collapse simulation experiment device comprises a test box, a karst foundation, a karst cave, an underground water circulation unit, a pressure measuring unit, two position adjusting assemblies and two water spraying assemblies, and the karst foundation with the karst cave is filled in a simulation construction site in the test box; the underground water circulation unit pumps and drains water at the same time to simulate underground water circulation of a karst cave, then only pumps water but not drains water to simulate underground water pumping on a construction site, the two water spraying assemblies spray water into the test box to simulate natural rainfall, and the two position adjusting assemblies move in the test box to form pressure test spaces at all positions in the test box correspondingly. Then the two water spraying assemblies spray water to the pressure testing space until the sprayed water presses the karst foundation in the pressure testing space to collapse, and the pressure measuring unit measures the pressure value during collapse, so that the ultimate bearing capacity simulation experiment is carried out on the karst foundation in the pressure testing space.

The embodiment of the invention discloses an anti-surge control method and device for a compressor, the compressor, a storage medium and a program product. Wherein an inlet pressure measuring module and an inlet regulating valve are arranged on the gas inlet side of the compressor, and an outlet pressure measuring module and an outlet regulating valve are arranged on the gas outlet side of the compressor; the method comprises the steps that the current inlet pressure, measured by an inlet pressure measuring module, of a compressor and the current outlet pressure, measured by an outlet pressure measuring module, of the compressor are obtained, and the current pressure difference of an inlet and an outlet of the compressor is calculated; comparing the current pressure difference with a set pressure difference threshold value to obtain a regulation and control parameter; determining a current control interval from a predetermined split-range control model based on the regulation and control parameters; and on the basis of the current control interval, opening control is conducted on at least one of the inlet adjusting valve and the outlet adjusting valve. According to the technical scheme, the surge risk of the compressor can be effectively reduced.

The embodiment of the invention provides a pressure control method, electronic equipment, a pressure stabilization control system and a storage medium, and relates to the technical field of nuclear reactors. The method comprises the following steps: acquiring a pressure measurement value and a pressure setting value of the pressure stabilizer; determining a pressure deviation value according to the pressure measurement value and the pressure setting value; if the absolute value of the pressure deviation value is smaller than or equal to a first preset value, the charging and discharging flow of a loop is adjusted according to the pressure deviation value and the pressure measurement value so as to control the pressure of the pressure stabilizer; if the absolute value of the pressure deviation value is larger than the first preset value, the pressure stabilizer is controlled to be inflated or deflated according to the pressure deviation value so as to control the pressure of the pressure stabilizer. According to the embodiment of the invention, the voltage stabilization effect of the voltage stabilization control system can be improved.

The invention discloses a diaphragm valve flow test system and method, and the system comprises a first test assembly and a second test assembly, and a first pressure measurement port of the first test assembly and a second pressure measurement port of the second test assembly are respectively communicated with a to-be-tested valve; a first test pipeline communicated with the first test assembly is provided with a circulation path in a first direction; a second testing pipeline communicated with the second testing assembly is provided with a circulation path in the first direction. The upstream and downstream pressure values of the to-be-tested valve can be accurately detected through the first pressure gauge and the second pressure gauge, and the gas flow value is detected through the flow meter and substituted into a calculation formula to obtain an accurate flow coefficient value; the upstream first testing assembly and the downstream pressure measuring device are arranged at a specific distance according to the pipe diameter of the communicating pipeline, and the accuracy of the pressure value can be effectively ensured through the limitation of the pipe diameter and the distance; the actual temperature value of the fluid in the test system pipeline is monitored through the thermometer, and the influence of the temperature on the test result is effectively reduced.

The invention discloses a coal seam gas pressure while-drilling flow inversion method based on a conjugate gradient method. The method comprises the steps that firstly, a while-drilling gas flow mathematical model is constructed, and model parameters are determined; screening the field measured value of the gas flow while drilling; carrying out finite difference method forward modeling on the model, and calculating the drilling gas flow; constructing an objective function and calculating the gradient of the objective function by combining the calculated gas flow and the field measured value of the gas flow; and finally, on the basis of a regularization nonlinear conjugate gradient method, continuous iteration processing is carried out on the target function in combination with the search direction and the search step length, and an original coal seam gas pressure value is obtained through inversion output of the finally-iterated target function. The method is simple in implementation step, the inversion result is determined through test verification and has good accuracy and reliability, the pressure measuring time is shortened, the pressure measuring cost is reduced, the coal seam gas pressure measuring accuracy is improved, and the actual requirement of a coal mine for rapidly and accurately measuring coal seam gas parameters is met.

Methods for identifying mud motor stall events are provided herein. One method includes receiving drilling sensor data including a pressure measurement signal, calculating a smoothed pressure signal, calculating a pressure fluctuation signal, determining a pressure fluctuation distribution dataset, and calculating a set of statistical values from the pressure fluctuation distribution dataset, where the set includes a pressure fluctuation value for a selected percentile value and probability distribution parameters that characterize a selected theoretical probability distribution function. The method also includes calculating a theoretical pressure fluctuation value for another selected percentile value using the probability distribution parameters, identifying mud motor stall event(s) when a pressure measurement value from the pressure fluctuation signal is greater than the calculated pressure fluctuation value and the calculated theoretical pressure fluctuation value multiplied by a prescribed numerical value, and utilizing the identified mud motor stall event(s) to manage the borehole drilling operation.

The invention relates to the technical field of sensor measurement, and discloses a bimodal sensor based on a single unit and a measurement method thereof.The sensor comprises a flexible upper substrate used for providing flexible supporting and packaging protection for the upper surface of the whole sensor, an upper electrode layer comprising a first circular electrode and used for forming capacitance change to respond to pressure stimulation, and a lower electrode layer comprising a second circular electrode and used for forming capacitance change to respond to pressure stimulation; the upper electrode layer is arranged on the flexible lower substrate and serves as a leading-out end of an electric signal; the method comprises the steps of system initialization, bimodal signal synchronous acquisition and transmission, signal processing and signal output and display. According to the invention, through the cooperation of the concentric circle electrode design and the independent signal channel, the hardware decoupling of temperature and pressure signals is realized, the problem that the traditional sensor interferes with pressure measurement and depends on algorithm compensation due to temperature drift caused by sharing the same electrode and signal channel is solved, and the accuracy and reliability of bimodal measurement are fundamentally improved.

The invention discloses a calibration test method and system for a pressure sensor, and relates to the technical field of pressure sensor calibration. According to the method, original temperature and voltage data are collected in real time, ideal pressure is obtained through an ideal state equation, original output voltage is obtained through a preset relation model in combination with the temperature, then precise compensation of zero drift and sensitivity drift is completed in sequence through a multi-dimensional calibration coefficient, and further correction is performed through a linear regression relation polynomial, so that the accuracy of the zero drift and the sensitivity drift is improved. And finally, a detection pressure value is obtained. The output pressure value is closer to the real physical quantity, the application requirements of high-precision scenes such as medical equipment are met, and the calibration effect and the pressure measurement precision are improved.

The invention relates to the technical field of pressure detection, in particular to a single crystal furnace vacuum pipeline pressure measuring method and device. The method comprises the following steps: quantifying temperature deviation of a vacuum pipeline in a crystal growth process; carrying out matching analysis on the temperature data and the growth trend of the growth rate, and carrying out time delay identification on the temperature data and the growth rate through a matching section group; dynamic compensation of temperature lag is analyzed according to the relation between temperature data in the crystal growth process and the time delay change of the growth rate and the deviation change of pressure, and a delay compensation index is determined; and performing temperature data compensation according to the delay compensation index and the temperature offset to obtain current adjustment pressure measurement data. The dynamic accompanying condition of the temperature and the crystal growth is analyzed, the time delay compensation is determined through the accompanying time delay degree, the temperature data is compensated in combination with the temperature deviation, and the pressure is adjusted, so that the measured pressure data can more truly reflect the pressure condition in the crystal growth process, and the pressure measurement precision is improved.

The invention discloses an automatic switching metering method suitable for multiple ranges of a pressure gauge, and the method comprises the steps: S1, obtaining the information of a current pressure measurement environment, inputting a pressure range prediction model, and outputting an initial recommended range; s2, selecting a measurement parameter of a corresponding measuring range, and performing preliminary measurement on the pressure at the initial sampling frequency to obtain a preliminary measurement pressure value; s3, comparing the preliminarily measured pressure value with the upper range limit and the lower range limit of the selected range, and judging that a higher / lower range needs to be switched; s4, the calibration coefficient of the range to be switched is obtained and corrected, and a corrected pressure measurement value is obtained; s5, dynamically adjusting the sampling frequency; and S6, the pressure change rate is monitored in real time, and the measuring range capable of covering the current pressure change range is preferentially selected for measurement. According to the invention, multi-range intelligent switching of the pressure gauge is realized, and the measurement precision and response speed in the full-range range are improved.

The invention discloses a regional water resource adjusting method and device and a medium, and relates to the field of water resources. The method comprises the following steps: based on a driving force-pressure-state-influence-response framework and a coupling coordination degree model, establishing an index system for quantifying the coupling coordination level of a water resource environment and influence factors; according to the indexes in the index layer under the pressure measurement index and the response measurement index, determining the effect score of the influence factor on the water resource environment; according to indexes in the index layer under the driving force measurement index and the influence measurement index, determining an effect score of the water resource environment on the influence factor; a coupling coordination degree function is adopted to obtain the coupling coordination degree of the water resource environment and the influence factors; according to the coupling coordination degree and the two action scores, the coupling relation between the water resource environment of the research area and the influence factors is obtained; and formulating a water resource environment regulation strategy based on the coupling relationship and the influence factor. The method can accurately adjust the bearing pressure of the regional water resource environment and maintain the balance of the water resource environment.

The invention belongs to the technical field of flow meters, and particularly relates to a bidirectional flow type balance flow meter which comprises a measuring pipe, a flow meter, a flow meter and a flow meter. A pair of pore plates is connected into the measuring tube, the two pore plates are respectively used for performing pressure reduction on fluid in the measuring tube twice, a plurality of pressure reduction holes are uniformly formed in the pore plates, a first pressure taking tube is connected onto the measuring tube, and the first pressure taking tube is arranged between the two pore plates; the two straight pipes are respectively connected with a first pressure taking pipe, the two straight pipes are respectively connected with a second pressure taking pipe, the first pressure taking pipe is used for carrying out pressure measurement on fluid after first pressure reduction, and the differential pressure transmitter is connected with the first pressure taking pipe and the second pressure taking pipes; the processor is used for processing the pressure difference signal; the flow meter is fixedly arranged on the differential pressure transmitter; the two pore plates are arranged to depressurize the fluid twice, the pressure sensor obtains the pressure difference twice, the processor calculates the pressure difference twice to obtain the flow, and then the measurement result is more accurate.

The invention discloses a space grid method for interconversion of geodetic height and barometric height, and belongs to the technical field of aviation navigation and geographic information systems. According to the method, the mutual conversion of geodetic height and barometric height is realized through establishing a global space-time grid reference system, establishing a space-time grid data base, converting barometric height to geodetic height, inversely converting the geodetic height to the barometric height, and carrying out reference conversion, data fusion and grid compression between the barometric heights. According to the method, the vertical availability of the height estimation value obtained through air pressure measurement within the height range within the stratosphere can be improved, the method is suitable for most weather conditions, the height estimation value with the precision reaching the ten-meter level can be achieved, and compared with an existing ISA-based method, the precision is higher, the application range is wider, and the application range is wider. The method can effectively improve the reliability of flight control systems of various aircrafts, and has wide application prospects in urban air traffic operation.