45 results about "Measurement cost" patented technology

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 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.

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 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.

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.

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 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.

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 application belongs to the technical field of material analysis, and provides an elastic constant measurement method, a system and an ultrasonic device. The method combines a sandwich structure and places the sandwich structure in an acoustic coupling medium, collects ultrasonic data passing through the sandwich structure through a transmission omnidirectional ultrasonic mode, can construct a five-layer sound line tracking model, and uses a particle swarm optimization algorithm to calculate the optimal ultrasonic speed by comparing the actual propagation time of ultrasonic waves in the five-layer sound line tracking model with the predicted propagation time, and then obtains the elastic constant of the material to be measured. The scheme provided by the application solves the problem that the existing ultrasonic characterization thin layer material method is easily affected by the measurement error introduced by wrinkles, provides an ideal measurement environment state, and innovatively uses the transmission omnidirectional ultrasonic mode to reduce the complexity and measurement cost of the device, and realizes nondestructive, accurate and reliable measurement of the elastic constant of the material.

The application discloses a grid-connected three-phase LCL inverter parameter monitoring method for digital twin modeling, comprising: obtaining actual measurement data of the grid-connected three-phase LCL inverter; based on the actual measurement data, iteratively optimizing a monitoring parameter set of a digital twin model of the grid-connected three-phase LCL inverter based on an adaptive particle swarm algorithm, comprising: running the digital twin model under each monitoring parameter set to obtain corresponding multiple groups of model output data, calculating corresponding error objective functions, and taking the monitoring parameter set corresponding to the minimum objective function value as the optimal monitoring parameter set; in response to the error objective function value of the optimal monitoring parameter set being less than a function threshold value, the optimal monitoring parameter set is output as the final optimal monitoring parameter set for subsequent parameter monitoring; otherwise, iteratively optimizing is continued. The high-precision calibration of the digital twin model and the real inverter is realized, so that the key parameters in the real inverter which are difficult to directly measure or have high measurement cost can be calculated in real time.

The invention belongs to the technical field of underwater terrain modeling, and particularly relates to an underwater terrain intelligent modeling method and device based on a river terrain key structure. According to the method, the river center line recognition model is constructed through transfer learning, automatic recognition of the complex river form is achieved, the problem that the center line of a bifurcated and curved river reach is difficult to extract is effectively solved, a section measurement scheme is designed based on the length and curvature of the river channel, key coverage of sparse water depth measurement points on the river channel form is achieved, and the measurement cost is reduced. Meanwhile, the precision of underwater terrain modeling is guaranteed, section sideline points, thalweg points and slope change points are automatically recognized through a convolutional neural network model, the manual marking workload is reduced, the section feature point extraction efficiency and accuracy are improved, and the generated riverbed height meets measurement data and also meets the requirement of the riverbed height through a center line curvature constraint interpolation method and a curve smooth interpolation method. The river form continuity is kept, and sharp turning or abnormal areas are avoided.

The utility model discloses a simple long pipe fitting measuring gauge which comprises a detection base. The bottom of the detection base is of a plane structure, and a product placement groove is formed in the top of the detection base in the length direction of the detection base; a first clearance groove is formed in one end of the top of the detection base, and one end of the product containing groove extends into the first clearance groove. According to the utility model, the product placing groove, the first clearance groove and the measuring groove are arranged on the detection base, and the distances between the inner wall of the measuring groove and the measuring reference surface are respectively set as the measuring minimum value and the measuring maximum value, so that the product is judged to be a qualified product if the length of the product is between the measuring minimum value and the measuring maximum value during detection, otherwise, the product is judged to be qualified. Therefore, the detection efficiency is greatly improved, the problems of low speed, complex operation and high measurement cost of the traditional detection method are effectively solved, and the practicability is high.

The application provides a regular wave slamming construction platform stress analysis method and system and a computer readable storage medium thereof. According to platform basic dimensions and wave basic parameters, a stress condition of the regular wave slamming construction platform is directly, quickly and efficiently calculated based on a large amount of test measurement data. The defects of the direct calculation complexity, measurement cost and the like of the slamming pressure load prediction in the existing theoretical calculation and model test are solved.

The embodiment of the application discloses a kind of shape and position tolerance detection frock and detection method, wherein the frock includes: frock base, the frock base is used to support;Main rod, the main rod is vertically connected with the base;Auxiliary rod, the auxiliary rod is vertically connected with the main rod, the relative position of the auxiliary rod with the main rod is adjustable;Dial gauge, the dial gauge is connected to the end of the auxiliary rod by clamp table piece;The clamp table piece is used to adjust the position of dial gauge.Improve detection efficiency, reduce measurement cost.

The application provides an irregular wave slamming construction platform stress analysis method and system and a computer readable storage medium thereof. According to platform basic dimensions and wave basic parameters, a stress condition of the irregular wave slamming construction platform is directly, quickly and efficiently calculated based on a large amount of test measurement data. The defects of the direct calculation complexity, measurement cost and the like of the slamming pressure load prediction in the existing theoretical calculation and model test are solved.

The application uses images to construct a forest sample plot measurement model. The three-dimensional reconstruction of images obtained by using a smart phone has the advantages of low measurement cost and simple actual operation suitable for field operation. The improved DBSCAN algorithm improves the accuracy of clustering, so that the constructed three-dimensional measurement model can be used for obtaining forest structure parameters, and the measurement accuracy of the structure parameters is much higher than the national forest second-class survey standard.

The invention relates to a method for verifying the interference magnitude of a C-shaped opening bush of an automobile control arm, and the method comprises the following specific steps: S1, measuring the outer diameter of the C-shaped opening bush: measuring the outer diameter of the C-shaped opening bush through an outer measuring claw of a vernier caliper, and obtaining the external diameter data D of the C-shaped opening bush; s2, measuring the opening size of the C-shaped opening bushing: measuring the opening size of the C-shaped opening bushing by using a main scale of the vernier caliper to obtain opening data L; and S3, quickly obtaining the size of the arc part of the outer ring of the C-shaped opening bushing through the 2D software: drawing a circle with the diameter of D and a vertical line with the length of L on the 2D software, and removing the arc corresponding to the vertical line through the 2D software to obtain a final arc with a notch. The method has the advantages of being convenient to operate, small in measurement deviation, high in measurement precision, low in measurement cost and the like.

This invention discloses a cross-sea combined distributed measurement system and method, relating to the field of bridge construction technology. The cross-sea combined distributed measurement system includes multiple instrument platforms and multiple reference platforms. The multiple instrument platforms are spaced apart on one side of the bridge pier, and each instrument platform is equipped with a first total station on its top. The multiple reference platforms are spaced apart between the instrument platforms and the bridge pier, and each reference platform is equipped with a first target on its top. Each bridge pier is equipped with a second total station on its top. The reference elevation of the reference platform is measured using the first total station of two adjacent instrument platforms and the first target of one reference platform. Based on the reference elevation of the two reference platforms, the elevation of the bridge pier is measured using the second total station of one bridge pier and the first targets of the two adjacent reference platforms. By setting up multiple reference platforms and multiple instrument platforms to perform measurements together, the number of instrument platforms set up in the sea is reduced, the construction period is shortened, and the measurement cost is reduced.

The invention belongs to the field of numerical control lathe in-situ measurement system calibration, and particularly relates to a numerical control lathe in-situ measurement system rapid calibration device and method.The calibration device is in a step shape and is formed by coaxially connecting a plurality of cylindrical sections with different diameters, and the cylindrical sections are in smooth transition; when the device is used, the characteristics of a horizontal machine tool and a vertical machine tool are considered, different measurement methods are provided, the problem that the standard device is difficult to clamp and calibrate due to the fact that the internal space of an in-situ measurement system of a numerical control lathe is limited is effectively solved, the calibration efficiency is remarkably improved by means of the calibration device and method, and the calibration precision is greatly improved. The calibration time is shortened to 2 hours from the original 6 hours, and the measurement cost is greatly reduced.

The present application relates to the technical field of shale mechanical property prediction, and discloses a shale mechanical property prediction method based on a shared decision tree multi-task gradient boosting machine, comprising the following steps: S1, taking sample data under different block and different storage conditions as data sources, wherein total organic carbon content TOC, sampling depth, mineral composition, temperature and pressure are taken as characteristic data, and the elastic modulus, Poisson's ratio and compressive strength of shale are taken as label data; and the characteristic and label data are randomly divided into a training set, a validation set and a test set in a ratio of 0.7:0.2:0.1. Compared with the traditional experimental measurement method, the shale mechanical property prediction method based on the shared decision tree multi-task gradient boosting machine effectively captures the nonlinear relationship between the multi-source characteristics such as mineral composition, confining pressure and temperature and the shale mechanical property under the premise of reducing the measurement cost, and finally has high fitting precision and improves the prediction speed.

The invention discloses a high-stability structure deformation performance inversion method. The method comprises the following steps: dividing an overall structure body into a plurality of finite structure units; obtaining a structural unit end face parameter set; constructing a structural attitude mapping model and obtaining an attitude angle set of grid cells; constructing a modal response prediction model and obtaining a modal coordinate vector prediction value; and carrying out inversion to obtain an overall strain field of the structure. According to the method, full-field deformation inversion can be realized in real time and with high precision through pose reconstruction and modal coordinate inversion technologies in the absence of comprehensive sensor layout, so that the measurement cost is remarkably reduced, and the prediction precision and the interference resistance are improved.

This invention relates to the field of data measurement, specifically to an online method for measuring the exhaust enthalpy of a steam turbine low-pressure cylinder. It includes the following steps: S1, connecting the steam inlet pipe to the low-pressure cylinder exhaust port and the steam outlet pipe to the condenser extraction port; S2, detecting the temperature values ​​T1, T2, and T3 at the temperature measuring points of the steam inlet pipe, connecting pipe, and steam outlet pipe, and the corresponding pressure values ​​P1, P2, and P3 at the pressure measuring points; S3, calculating the exhaust enthalpy of the low-pressure cylinder, i.e., the initial interface enthalpy H1 corresponding to T1 and P1, H1 = 2 * H2 - H3, where H2 is the intermediate interface enthalpy corresponding to T2 and P2, obtained by looking up the enthalpy entropy diagram based on T2 and P2, and H3 is the outlet interface enthalpy corresponding to T3 and P3, obtained by looking up the enthalpy entropy diagram based on T3 and P3. This invention features a simple measurement method, enables rapid single-point measurement, and has low measurement costs.

The invention discloses a communication method and device, relates to the technical field of communication, and can improve the measurement flexibility, reduce the measurement redundancy and reduce the measurement overhead when a terminal carries out SSB measurement. The method comprises the following steps: acquiring first indication information which corresponds to a terminal and is used for indicating a plurality of synchronization signal blocks (SSB); wherein the plurality of SSBs comprise a first SSB corresponding to the position information of the terminal, and at least one second SSB; the first SSB corresponds to the first area, the second SSB corresponds to the second area, and the second area is adjacent to the first area; determining at least one third SSB to be measured and measurement time information corresponding to the at least one third SSB according to the first SSB and the at least one second SSB; measuring the at least one third SSB in the measurement time information corresponding to the at least one third SSB to obtain a measurement result; and sending a measurement result.

A method for accuracy simulation analysis of a multi-camera rapid surface measurement system effectively solves the problem of accuracy simulation analysis for such systems. It enables the planning, design, and evaluation of the measurement mesh for the system, using the optimal mesh parameters as a reference to guide the on-site construction of the system and ensure accurate measurement of antenna surfaces. The method involves first building simulation analysis software; then, combining the actual on-site measurement environment, the software simulates and analyzes different measurement meshes; next, the rapid surface measurement system is constructed; finally, data is collected and analyzed, and the simulation software is used to perform accuracy simulation analysis of the multi-camera rapid surface measurement system, ensuring accurate measurement. This invention offers low measurement cost, saves manpower and resources, has high measurement speed and accuracy, and has practical application and promotion value.

The application discloses a kind of detection direction identification and deformation compensation methods of microstructure three-dimensional measurement probe, the probe includes base, suspension mechanism and detection component;Base is opened with empty slot, and detection component and detection component are installed in empty slot;Suspension mechanism is installed at the notch of empty slot;Empty slot is provided with ball socket.Detection component includes contact ball, sampling rod, electrode ball and spherical electrode plate group;Spherical electrode plate group includes five spherical electrode plates;Five spherical electrode plates are fixed on the inner wall of ball socket;The side of each spherical electrode plate towards the ball center of ball socket is concave spherical crown face;The ball center of spherical crown face on spherical electrode plate is coincident with the ball center of ball socket.Electrode ball is installed between five spherical electrode plates.The application effectively improves the efficiency of measurement by the principle of capacitance sensor formed by the gap change between spherical electrode plate and electrode ball, measurement operation is convenient, while guaranteeing the measurement accuracy, reduce measurement cost.

The invention discloses a method and a device for measuring the warping degree of an epitaxial material. The method for measuring the warping degree of the epitaxial material comprises the steps that the epitaxial material is divided into a preset number of grid points in the first direction and the second direction, and the adjacent grid points are spaced by a preset distance; obtaining the height of each grid point on the epitaxial material in the third direction; wherein the first direction, the second direction and the third direction are perpendicular to one another; obtaining a height maximum value, a height minimum value and a height average value of each grid point in the third direction according to the height of each grid point in the third direction; and calculating the warping degree of the epitaxial material based on the size relationship among the height maximum value, the height minimum value and the height average value. According to the method, the warping degree of the epitaxial material can be preliminarily measured, the measurement process is convenient, and the measurement cost is low.

The utility model discloses a guardrail center height rapid measuring device, and solves the problem that an existing measuring device cannot realize adjustment. The device comprises an installation support, a laser range finder, a horizontal bubble device and an adjusting assembly, the installation support comprises a vertical part, a horizontal part and a hook, the vertical part and the horizontal part are arranged perpendicular to each other, the hook is arranged at the outer end of the horizontal part of the vertical part, a long-strip-shaped hole is formed in the vertical part, and the adjusting assembly is fixed to the long-strip-shaped hole. A horizontal bubble device is installed on the upper surface of the horizontal part, a laser range finder is fixedly installed on the lower surface of the horizontal part, and a laser head of the laser range finder is vertically arranged downwards. The device has the function design of adjusting the verticality and the levelness, and the verticality of the laser range finder can be accurately adjusted through the adjustment, so that the accuracy of measured data can be ensured. Rapid installation and convenient adjustment can be realized, one person can operate, the measurement cost is reduced, and the working efficiency is improved.

The invention belongs to the technical field of industrial automatic measurement and computer vision, and particularly discloses a vehicle-mounted bulk material volume measurement method, device and equipment, a medium and a product. According to the method and the device, when it is detected that the target vehicle runs to the preset measurement area, the target reference plane is determined according to the two-dimensional side view image, and the top surface data of the loaded material is determined according to the three-dimensional point cloud data; and determining the volume of the material according to the target reference plane and the top surface data. Through the above mode, a two-dimensional and three-dimensional visual fusion thought is adopted, the two-dimensional side view image representing the boundary of the vehicle is captured, uncertainty caused by boundary extraction from noisy three-dimensional point cloud is avoided, three-dimensional point cloud data without dead angle coverage on the surface of the material is obtained, a measurement blind area generated by shielding is eliminated, and the measurement accuracy is improved. And the volume of the material is comprehensively determined by combining the target reference plane and the top surface data, so that the accuracy and efficiency of measuring the volume of the material can be effectively improved, and the whole measurement cost is reduced.