127 results about "Measurement cost" patented technology

The invention relates to a method, device and product for monitoring river flow in real time, and the method comprises the steps: obtaining tower footing video data of a target river reach which comprises a target section and a pier buoy; inputting the tower footing video data into a water level and flow velocity identification model, and obtaining the water level elevation and the surface flow velocity of at least part of the cross section in the target section through the water level and flow velocity identification model; inputting the water surface elevation into a three-dimensional digital river channel model to obtain a section water passing area of a corresponding cross section; and obtaining the cross section flow of the target cross section according to the cross section water passing area and the surface flow velocity. According to the embodiment of the invention, automatic flow estimation based on the tower footing video can be realized, the manual measurement cost is reduced, the spatial-temporal resolution of flow monitoring is improved, and the method can be used for large-range river monitoring, especially in areas lacking hydrometric stations, and can provide data support for drainage basin water resource management and flood prevention early warning.

The invention discloses a three-coordinate measurement method and system based on virtual simulation, and belongs to the technical field of virtual simulation measurement, and the method comprises the steps: obtaining virtual point cloud data of a measured workpiece, and obtaining a workpiece simulation curved surface model through curved surface fitting; a reference axis of the model is used as a mapping reference axis, a curved surface key measurement point location is identified, the spatial distance between the curved surface key measurement point location and a reference axis mapping position point is calculated, and a point location mapping deviation distribution map is generated; the deviation change trend is analyzed to eliminate false measurement points, and an optimized virtual point cloud model is obtained through reconstruction; performing geometric feature analysis and deviation judgment on the optimization model by using a pre-trained workpiece deviation recognition neural network, and outputting workpiece deviation region data; virtual three-coordinate modeling is executed according to the data, a deviation area virtual three-coordinate model is generated, and measurement is completed; according to the invention, three-coordinate measurement is realized through virtual simulation, the measurement efficiency and accuracy are improved, the entity measurement cost is reduced, and the method is suitable for accurate measurement scenes of various workpieces.

The invention discloses a device and a method for detecting marine organisms attached to an underwater structure. The device comprises a machine shell, a watertight pressure-resistant cabin arranged in the machine shell, an ultrasonic signal excitation and receiving module arranged outside the machine shell, an underwater carrying camera, a motion control mechanism, a man-machine interaction module, a power supply system arranged in the watertight pressure-resistant cabin and a data storage processing module. The method comprises the following steps: initial motion control and information input of a to-be-tested component group; lowering the device to a specified position; inputting a motion direction and a speed; opening an ultrasonic signal excitation and receiving module; the movement mechanism is started, and the control device translates in the vertical component direction; continuously receiving images and signal images; stopping movement, closing the probe, and calculating the thickness; carrying out data return processing; recovering the device, and the like. According to the device, manual detection is replaced, the measurement cost and difficulty can be reduced, the measurement data accuracy is improved, and timely and efficient measurement is achieved.

The invention discloses a measuring thickness increasing method, a strip steel thickness measuring method, a system and a medium, and the method comprises the steps: increasing the tube voltage of an X-ray thickness gauge from a preset voltage value to a target voltage value, and increasing the tube current of the X-ray thickness gauge from a preset current value to a target current value, the preset voltage value and the preset current value are working parameters of the X-ray thickness gauge in an original thickness measuring range; based on a plurality of thicknesses corresponding to a target thickness measurement range, the standard plate under each thickness is measured through a plurality of measurement channels of the X-ray thickness gauge, and the target thickness measurement range is larger than the original thickness measurement range; and determining a linearization curve of each measurement channel based on the measurement result of each measurement channel on the standard plate with each thickness, the linearization curve being used for determining the thickness of the to-be-measured object. According to the scheme, the thickness measuring range of the X-ray thickness gauge can be effectively increased, and the thickness measuring cost is effectively saved.

The invention discloses a grid-connected three-phase LCL inverter parameter monitoring method for digital twinning modeling. The method comprises the following steps: acquiring actual measurement data of a grid-connected three-phase LCL inverter; and according to actual measurement data, performing iterative optimization on monitoring parameter sets of a digital twin model of the grid-connected three-phase LCL inverter based on an adaptive particle swarm algorithm, including: operating the digital twin model under each monitoring parameter set to obtain corresponding multiple groups of model output data, and calculating a corresponding error objective function, taking the monitoring parameter set corresponding to the minimum target function value as an optimal monitoring parameter set; if an error objective function value responding to the optimal monitoring parameter set is smaller than a function threshold value, outputting the error objective function value as a final optimal monitoring parameter set, and performing subsequent parameter monitoring; and otherwise, iteration optimization is continued. And high-precision calibration of the digital twin model and the real inverter is realized, so that key parameters which are difficult to directly measure or high in measurement cost in the real inverter are calculated in real time.

The invention provides a tire noise testing system, which relates to the technical field of vehicle testing and comprises a base, a driving box is arranged at the top end of the base, the top end of the driving box is fixedly connected with a turntable through a rotating shaft, a tire fixing mechanism is arranged on the turntable, and a simulated road surface mounting mechanism is further arranged at one end of the base. According to the device, tires of different specifications and sizes are clamped and fixed by arranging the tire fixing mechanism, then the simulated road surface plate is moved to be in contact with the tires through the simulated road surface mounting mechanism, then the tires are rotated through the driving box, and finally the tires are rotated by rotating the tires. And noise is collected and tested during rotation. In the prior art, a rotary drum method is high in measurement cost, is influenced by a site, and is inaccurate in measurement data; the technical problems of high cost of measuring equipment, high requirement on a test road section, large external influence and limited test equipment in the prior art are solved.

The application provides a process industry soft measurement method based on feature extraction and incremental learning. The method introduces an end-to-end neural network soft measurement model composed of multiple parallel time series feature extraction self-encoder networks and a regressor network connected in front and back, extracts time series features from multi-process variable time series data, and uses the time series features for performance index soft measurement modeling. In addition, based on the time series features extracted by the model, the method proposes an incremental learning method based on time series features. The soft measurement method provided by the application can effectively and accurately perform soft measurement on some performance indexes that are difficult to directly measure or have high measurement cost in the process industry, and through the incremental learning method, the soft measurement model can long-term maintain good soft measurement performance in the industrial data stream with strong real-time performance, thereby providing reference and guidance for monitoring, measurement, optimization and control of various parameters in the process industry production process.

The invention relates to a bridge deflection measurement method and system based on a video phase. The method comprises the following steps: acquiring a vibration video, selecting a vibration image and preprocessing the vibration image; selecting feature points for the preprocessed vibration image and recording coordinates of the feature points; calculating the feature points and phase information of a preset area corresponding to the feature points; constructing an optical flow constraint equation based on the phase information and solving an optical flow component; calculating adaptive confidence corresponding to the feature points; and calculating the deflection. A non-contact video measurement mode is adopted, the measurement cost and the operation complexity are reduced through the bridge deflection measurement method and system based on the video phase, and long-term and real-time monitoring of the bridge deflection can be achieved. Through quantitative analysis and self-adaptive confidence evaluation of phase nonlinearity, the measurement precision in a complex environment is effectively improved, the problem of great influence of the phase nonlinearity is overcome, and the tiny deflection change of the bridge can be accurately measured.

The utility model provides a device for measuring square resistance. The device comprises a measuring cavity, a probe, a bearing platform and a cleaning mechanism, the bearing table is arranged in the measuring cavity and used for bearing a wafer, and the probe is arranged in the measuring cavity and used for measuring square resistance on the surface of the wafer; the cleaning mechanism is arranged on one side wall of the measuring cavity, and the cleaning mechanism is used for spraying gas to clean the probe. According to the device for measuring the square resistance provided by the utility model, the cleaning mechanism is arranged on the measuring cavity, and the cleaning mechanism adopts gas to purge and clean the surface of the probe, so that the probe is prevented from being abraded while the surface of the probe is ensured to be clean, the accuracy when the probe measures the square resistance is ensured, the frequency of replacing the probe is reduced, and the working efficiency is improved. Therefore, the measurement cost is reduced.

The invention discloses a gas-liquid two-phase flow measurement method based on a bent pipe and an acoustic emission technology, and belongs to the field of gas-liquid two-phase flow measurement. The method comprises the steps that the average liquid holdup HL of two-phase flow in a pipeline is measured, and the instantaneous speed Vc of a gas phase and a liquid phase passing through the 45-degree section of the bent pipe is calculated; identifying a gas-liquid two-phase flow pattern in the pipeline; taking the Vc, the HL, the apparent liquid velocity VSL and the apparent gas velocity VSG as variables, and adopting a dimensional analysis method to propose a correlation between the Vc and the VSL and between the HL and the VSL and between the VSL and the VSG according to different flow patterns; calculating an effective voltage value RMS of the acoustic emission signal, and establishing a correlation between the RMS and the VSL and VSG; fitting parameters in the correlation formula; newly collected Vc, HL and RMS are input into the fitted correlation formula, VSL and VSG are output, and therefore measurement of the gas-liquid two-phase flow is completed. Compared with a single-phase metering method after separation commonly used in the oil and gas industry, the device has the advantages of being simple in structure, low in measurement cost, capable of achieving real-time measurement, non-invasive and the like.

The invention relates to a method for measuring the frequency response characteristic of an electronic device based on an OFDM signal. The method comprises the following steps: generating a target input signal; accessing the target input signal to a first measurement object, and measuring a first output signal output by the first measurement object; accessing the first output signal to a second measurement object configured to be in a first state, and measuring a second output signal output by the second measurement object; the second measurement object is different from the first measurement object, and the second output signal is different from the first output signal; and calculating first frequency response information of the second measurement object in the first state according to the frequency response difference between the first output signal and the second output signal. Through the method, the measurement cost of the frequency response information of the electronic device can be reduced, and the measurement accuracy of the frequency response information can be improved.

A device for measuring in-situ drilling rock hardness based on a high-pressure water pressure head comprises a hydraulic power system, a data acquisition system, a test probe and a push rod, the front end of the push rod is connected with the rear end of the test probe; the hydraulic power system comprises a manual hydraulic plunger pump; the manual hydraulic plunger pump is connected with the test probe through a reversing three-way valve; the data acquisition system comprises a data recorder, a displacement sensor and a pressure sensor, the displacement sensor and the pressure sensor are arranged on the manual hydraulic plunger pump, and the displacement sensor and the pressure sensor are connected with the data recorder through a signal receiver. The device is simple in structure, convenient to operate and capable of measuring the rock strength of different drill holes, different depths and different point positions so as to obtain the distribution condition of the roadway rock strength, the measuring result is close to the on-site rock mass, a water medium is used for pressure transmission, the measuring process is simple, convenient, environment-friendly and safe, errors in the processes of sampling, processing and the like are avoided, and the working efficiency is improved. And the measurement cost is reduced.

The invention discloses a material hyperspectral BRDF measurement method based on a diffractive optical element, and solves the problems that the existing spectral BRDF measurement cost is relatively high, the measurement process is complicated, and the measured data is not accurate enough, the diffractive optical element has the characteristic of negative dispersion, and only clear imaging is performed on a single wavelength at a set focal length, so that the diffractive optical element has the characteristic of negative dispersion. On the basis of the concept, the end-to-end network based on the diffractive optical element and deep learning is adopted to jointly optimize the hyperspectral BRDF data of the target material, that is, network parameters for the BRDF hyperspectrum are synchronously learned while the DOE surface height is optimized, and material BRDF hyperspectral inversion is achieved. The optimized diffractive optical element and the CCD camera are used for replacing a spectrum detector to collect hyperspectral BRDF data, so that the size of measurement equipment can be greatly reduced, the total cost is reduced, and the precision and the accuracy are improved.

The present disclosure provides a motor rotating speed measurement method and device, vehicle, medium and program product, and relates to the technical field of vehicles, and comprises the following steps: determining a multi-phase current in a winding of a motor, and analyzing the multi-phase current to determine a current period and / or a current frequency of the multi-phase current; and obtaining the rotating speed of the motor according to the current period or the current frequency, without the need to additionally set a speed measurement device, thereby reducing the measurement cost, or in the case of a speed measurement device failure, the rotating speed of the motor can also be measured, and the reliability of the rotating speed measurement is improved.

The utility model relates to a device for rapidly measuring the locking amount of an external lock turnout, which is specially designed for railway maintenance work and aims to simplify the measurement process and improve the measurement precision and the operation convenience. The device integrates the first measuring slide bar, the second measuring slide bar and the limiting slide seat, and the stable sliding of the first measuring slide bar is realized through the limiting slide groove. The top end of the first measuring sliding rod is provided with scale marks, and measured values can be accurately read. The arrangement of the spring not only ensures the measurement stability, but also realizes the automatic resetting of the sliding rod, thereby improving the measurement efficiency. The whole structure is compact and light, and carrying and on-site operation are convenient. According to the device, the efficiency and the accuracy of railway maintenance work are improved, the measurement cost is reduced, and a powerful guarantee is provided for the safety and the reliability of railway operation.

The invention discloses a power distribution network load flow calculation method and system based on incomplete measurement, and the method comprises the steps: building an incomplete measurement linear load flow model based on a preset full measurement linear load flow model through a measurable node set and an unmeasurable node set of a power distribution network; according to a preset double-layer multiple linear regression framework, optimizing the incomplete measurement linear power flow model, and constructing a double-layer power flow model representing a linear relationship between measurable nodes and non-measurable nodes of the power distribution network; and acquiring load flow data of measurable nodes in the power distribution network in real time, inputting the acquired load flow data of the measurable nodes into the double-layer load flow model, calculating load flow data of non-measurable nodes, and obtaining load flow states of all the nodes of the power distribution network. According to the invention, the complete and accurate power flow state of the power distribution network can be obtained without measuring all nodes of the power distribution network, and the measurement cost is saved.

The application discloses a continuous beam line shape monitoring system, method, computer device and storage medium, and relates to the construction engineering information technology field.The continuous beam line shape monitoring system comprises a bridge management module, a measurement management module and a calculation management module, wherein the bridge management module is used for managing continuous beam basic information and performing bridge initialization according to an actual structure of the continuous beam; the measurement management module is used for dividing the whole continuous beam into a plurality of beam sections, and acquiring measurement values of a plurality of measuring points under different construction procedures of each beam section relative to a certain base point; and the calculation management module is used for judging whether an error between a measured value and a theoretical value of the beam section exceeds a normal value, and if yes, recording the beam section as an out-of-limit beam section.The application can automatically identify the out-of-limit beam section, reduces the construction measurement cost, improves the construction efficiency, automatically and intelligently judges the measurement result, eliminates the loophole of manually modifying the measurement result, and improves the construction quality.The application is widely applied to the construction engineering information technology field.

The invention belongs to the technical field of material analysis, and provides an elastic constant measuring method and system and an ultrasonic device.According to the method, a sandwich structure is combined and placed in an acoustic coupling medium, ultrasonic data penetrating through the sandwich structure are collected in a transmission-type omnidirectional ultrasonic mode, a five-layer sound ray tracking model can be constructed, and the elastic constant can be measured; and by utilizing a particle swarm optimization algorithm, the optimal ultrasonic sound velocity is calculated by comparing the actual propagation time of the ultrasonic waves in the five-layer sound ray tracking model with the predicted propagation time, and then the elastic constant of the to-be-tested material is obtained. According to the scheme provided by the invention, the problem that a thin-layer material ultrasonic characterization method in the prior art is easily influenced by a measurement error introduced by wrinkles is solved, an idealized measurement environment state is provided, and the equipment complexity and the measurement cost are reduced by innovatively utilizing a transmission-type omnidirectional ultrasonic mode; lossless, accurate and reliable measurement of the elastic constant of the material is realized.

This invention relates to the field of measuring tool technology and provides a precision measuring instrument for internal and external diameters. It includes two fixed tubes arranged side-by-side, with their ends connected by fixed blocks. Each fixed tube is equipped with an adjustment module, a measuring block assembly, a display module, and a probe adjustment assembly. This device uses a comparative measurement method to quickly and accurately cover the full-size measurement range of 300mm-3000mm, effectively reducing measurement costs. The device can reduce the influence of temperature and measuring force on dimensions and can be used for measuring and inspecting parts with small steps.

The application provides a three-dimensional pavement modeling method, and relates to the field of three-dimensional pavement modeling, and comprises the following steps: obtaining the difference from the average elevation of the starting cross section to the average elevation of the ending cross section in the original three-dimensional pavement data, determining the cross section with the difference greater than a preset threshold as a jump surface, processing the original three-dimensional pavement data, and obtaining all divided road sections; constructing first time series data according to the average elevation of all cross sections of each divided road section, converting the first time series data into first frequency data, and obtaining the pitch and vibration elevations; constructing second time series data according to the slope of all cross sections of each divided road section, converting the second time series data into second frequency data, and obtaining the roll angle of the corresponding measurement posture of each cross section; and correcting the original three-dimensional pavement data according to the pitch and vibration elevations and the roll angle, so as to complete three-dimensional pavement modeling. The application overcomes the measurement precision defects caused by the measurement posture, improves the measurement precision, and reduces the measurement cost.

Disclosed in the present application are a wafer polishing method and apparatus, a device, and a storage medium. The present application allows for accurate monitoring of wear of grinding wheels, has a simple and rapid operation process, and does not need other expensive specialized measurement instruments, reducing dependence on specialized devices and operators, reducing the operational complexity and measurement costs, reducing time waste caused by complicated measurement and computation processes, and solving the technical problems in the prior art of low accuracy and long time consumption during wear detection of grinding wheels.

The application discloses a kind of power-based air compressor flow measurement method and measuring device, the power-based flow calculation formula of the present application replaces measuring device to obtain air compressor operating flow, improves the measurement accuracy, effectively reduces the measurement cost, avoids the problems such as high installation and use condition requirement, large measurement error and additional pressure loss when using differential pressure flow measuring device;And can efficiently and quickly obtain air compressor operating flow, when operating condition changes, still can obtain flow result at any time, eliminates the debugging adaptation process of flow measurement device, and the measurement result is more accurate.

The present invention belongs to the field of ocean wave feature extraction, and specifically relates to a method for inverting sea wave features based on reverse echo measurement, which includes the following steps: obtaining the echo signal from the seabed to the ocean surface, performing adaptive time window smoothing processing on the echo signal, and performing outlier identification and missing data filling on the data after smoothing processing; using the improved Tukey method to remove outliers and using the piecewise cubic spline interpolation method to fill in the missing data; obtaining the sea wave echo signal with the low-frequency trend removed through high-pass filtering and detrending processing; selecting an appropriate time window to calculate the dispersion of the echo time, establishing a mathematical relationship between the dispersion and the significant wave height through a regression algorithm, and substituting the observed data into the equation to obtain the inversion result of the significant wave height. The present invention performs feature inversion on sea waves based on reverse echo measurement technology, effectively improving the accuracy of sea wave feature extraction, reducing the on-site measurement cost, and providing a stable and low-cost sea wave measurement method.

The mining wireless while-drilling track measuring device comprises a drilling machine, an explosion-proof computer is fixedly connected to the front end of the drilling machine, a filter module is fixedly connected to the top end of the outer wall of one side of the explosion-proof computer, and an amplifier module is fixedly connected to the center of the top of the explosion-proof computer; measurement data is transmitted to an orifice explosion-proof computer through a main drill rod and the ground, special equipment such as cable connection and a cable-passing drill rod is not needed, and the transmitting end of the measurement device transmits the data to the explosion-proof computer through a common drill rod and the ground in the form of differential signals. The explosion-proof computer receives and processes in real time through the filter module, the amplifier module and the data processing module, data decoding, calculation and posture display are achieved, main parameters such as the inclination angle, the azimuth angle and the tool face angle of a drill hole can be synchronously measured in real time while drilling, and drilling personnel can conveniently master the situation such as the posture of the drill hole at any time; and the working face angle and the process parameters are adjusted in time, so that the drilling meets the design track requirement, and the measurement cost is further reduced.

The embodiment of the invention discloses a rotating speed measuring method, device and equipment for an underground drilling tool and a medium. The method comprises the following steps: acquiring previous sensor data and current sensor data of a target drilling tool; wherein the sensor is a two-axis fluxgate sensor which is installed in a directional sensor in a target drilling tool in advance; performing filtering processing on the previous sensor data based on a high-pass filter to obtain previous filtering data; determining current filtering data of the target drilling tool according to the high-pass filter, the previous sensor data, the current sensor data and the previous filtering data; and determining the rotating speed of the target drilling tool according to the high-pass filter, the current sensor data and the current filtering data. According to the technical scheme, high-precision measurement of the rotating speed of the drilling tool can be achieved directly based on the two-axis fluxgate in the directional sensor of the while-drilling system, the real-time performance is high, the application range is wide, other extra hardware support is not needed, the measurement cost can be reduced, and the measurement efficiency can be improved.

The utility model discloses a household single-phase plug gauge which comprises a gauge body, the gauge body is provided with a through hole which can be sleeved on a plug pin of a plug in a matching manner, the lower surface of the gauge body is a plane which is used for flatly leaning against the plug, and the lower surface of the gauge body is provided with a distance reference line corresponding to the through hole. The distance between the distance reference line and the edge of the through hole is the minimum distance from the plug pin to the edge of the plug specified in the standard, and the upper surface of the gauge body is provided with at least one pair of reference planes with height difference. The distance between the lower reference plane in each pair and the lower surface of the gauge body is the minimum value of the effective length of the bolt specified in the standard, and the distance between the higher reference plane in each pair and the lower surface of the gauge body is the maximum value of the effective length of the bolt specified in the standard. The device is convenient to use, and can improve the measurement efficiency and save the measurement cost.

The present invention discloses a measuring device, comprising a base, a first bracket, and a second bracket. The first bracket is used to connect to a system to be measured, and the second bracket is spaced apart from the first bracket and is used to connect to a displacement output terminal of the system to be measured. One of the first bracket and the second bracket is provided with a displacement measuring member, and the other is provided with a displacement measuring mating member. The first bracket has a first state and a second state; the second bracket has a third state and a fourth state. When the first bracket is in the first state, the second bracket is in the third state; when the first bracket is in the second state, the second bracket is in the fourth state; and the maximum value of the first range is less than the minimum value of the second range. The measuring device can measure output displacements in different ranges, reducing measurement costs.

The application discloses a navigation system-based rod arm vector calibration method, a controller and a navigation system. The method comprises the following steps: controlling a second machine to rotate with the origin of a second coordinate system as the center; when a second electronic distance measuring device, a first electronic distance measuring device and a second inertial measurement unit are on the same straight line, measuring a first minimum distance value by the second electronic distance measuring device; controlling the first machine and the second machine to rotate by an iterative method to calibrate the relative position of the phase center of the second electronic distance measuring device in the rod arm vector in the second coordinate system; controlling the second machine to rotate by a preset angle, and measuring a second distance measurement value by the second electronic distance measuring device; and obtaining the length of the rod arm vector of the phase center of the second electronic distance measuring device in the second coordinate system according to the first distance measurement value and the second distance measurement value. The embodiment of the application realizes the measurement of the rod arm vector of the UWB phase center in the IMU coordinate system, and reduces the measurement cost and complexity.

A kind of scraper conveyor chain wheel shaft group chain nest wear measurement frock and method, including first leg, second leg, first scale, second scale;The upper end of first leg and second leg is hinged by fixed assembly;First scale is slidably installed with fixed assembly, so that first scale can slide up and down along the longitudinal direction of fixed assembly, the lower end of first scale is horizontally fixed with long needle, and the front end face of long needle is slidably attached with first leg and second leg;The two sides of second scale are slidably installed with first leg and second leg respectively, for measuring the angle between first leg and first scale, the angle between second leg and first scale.The related parameters of the measured chain wheel tooth are measured by using chain wheel shaft group chain nest wear measurement frock, the actual wear of the measured chain nest point is obtained, in use, it is simple to operate, reading is convenient, can reduce manual and measurement cost, according to measurement result, timely adjust or replace chain wheel shaft group, effectively improve the life of chain and whole machine.

The present invention relates to the field of water body video measurement, and is used to solve the problem that, during water area monitoring, multiple water body parameter monitoring systems are independent of each other and lack effective data interaction, thereby increasing measurement costs and reducing measurement accuracy. The present invention is specifically a method for integrated continuous monitoring of water level, flow rate and flow. In the present invention, rough measurement results are obtained through contact measurement to generate preconditions for auxiliary video image analysis, and then a non-contact measurement method of video images is used to further improve the accuracy of video image analysis and measurement, while reducing the difficulty of flow rate analysis of water bodies using video images and reducing monitoring costs. Multi-source synchronous acquisition and processing are performed by image acquisition equipment, thereby improving the accuracy and continuity of water level measurement. The flow rate can also be predicted by rationally utilizing water level and flow rate monitoring data, which can reduce the cost of performing flow rate measurement alone and improve data utilization.