92 results about "Measurement cost" patented technology

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 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 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.

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 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.

The invention provides a regular curved surface steel structure verticality measuring device and a measuring method thereof.The regular curved surface steel structure verticality measuring device comprises a to-be-measured body, the top of the to-be-measured body is provided with a measuring device, the measuring device comprises a sphere positioning mechanism, the bottom of the sphere positioning mechanism is provided with a rotating frame, the bottom of the rotating frame is provided with a sliding block, and one end of the sliding block is provided with a rotating plate; one end of the rotating plate abuts against the to-be-detected body. According to the overall structure, the connecting line of the multiple second mark points can be rapidly parallel to the bus of the to-be-measured body, the sphere positioning mechanism can adapt to different types of regular curved surface steel structures, the laser projector and the photogrammetry technology are combined, the perpendicularity can be rapidly measured, the measurement precision is greatly improved, and the measurement cost is reduced. And human errors and measurement errors caused by a curved surface structure are prevented from being introduced when perpendicularity is measured by using a plumb bob method and a total station, so that the perpendicularity measurement precision of the regular curved surface steel structure is greatly improved, and the method has a relatively high popularization value.

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 invention discloses a small deep hole diameter measuring device and method, and the device comprises a plug gauge body which comprises a concentric step type cylinder structure composed of a clamping positioning part and a measurement correction part, and the measurement correction part is a cylindrical circular truncated cone with a taper angle; the measurement method comprises the following steps: driving the measurement correction part of the plug gauge body to be plugged into a deep hole of a to-be-measured part; and measuring and / or acquiring the characteristic parameters and the leakage height of the plug gauge body, comparing whether the leakage height of the plug gauge body falls into a standard range based on a correction scheme, and judging whether the deep hole size of the to-be-measured part reaches the standard. The surface of the deep hole cannot be scratched during detection, and the rejection rate and the measurement cost are effectively reduced; whether the size meets the requirement can be rapidly measured in batches, whether production equipment is abnormal or not can be found in time, and the full-inspection cost is effectively reduced; the plug gauge can ensure the effectiveness through regular re-measurement of the size, and can be continuously used through a plurality of groups of correction corresponding relations in case of wear, so that the inspection mode is convenient and effective.

The application discloses a kind of amplitude-phase deviation measurement methods of analog active phased array, it is calculated with the measured complex transmission pattern / measured complex receiving pattern one-time to obtain the amplitude deviation ratio and phase deviation value of all uplink / all downlink of one-dimensional linear array or one-dimensional conformal array, the amplitude-phase deviation of two-dimensional planar array or two-dimensional conformal array is determined using the amplitude-phase deviation of all one-dimensional linear array or all one-dimensional conformal array.Compared with existing amplitude-phase deviation measurement method, the transmission pattern / receiving pattern is calibrated using the amplitude-phase deviation measurement method, which is a direct calibration method for transmission pattern / receiving pattern, since the measured transmission pattern / measured receiving pattern includes the influence of mutual coupling effect between antenna elements, the transmission pattern / receiving pattern formed has smaller deviation from the expected transmission pattern / receiving pattern, and the method has the advantages of short measurement time, high measurement efficiency, low measurement cost and the like.

The present invention relates to an observation device system and method for particle motion in continuous cross-flow filtration. By designing a flat membrane cross-flow filtration device, ideal cross-flow filtration can be achieved, thereby being consistent with the ideal flow conditions in a theoretical model. At the same time, non-invasive observation of particle motion can be achieved, avoiding the influence of a lens on the cross-flow in invasive observation. The particle motion observation using the observation device system is simple and easy to operate, has efficient data processing, intuitive experimental recording results, low measurement cost, and can comprehensively obtain particle dynamics information such as particle displacement and velocity.

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 invention provides a current distribution state measurement method and device for a crimping type IGBT device, and relates to the technical field of electrical engineering, and the method comprises the steps: sleeving a rotating ring at the outer side of a to-be-measured crimping type IGBT device; the bipolar coil assembly is fixedly arranged on the rotating ring, and two bipolar coils of the bipolar coil assembly are oppositely arranged; the rotating ring is connected with one side of a conveying belt, and the other side of the conveying belt is connected with a synchronous wheel; a synchronous wheel is controlled to rotate, a conveying belt is driven to move in the synchronous wheel rotating process, and a rotating ring is driven by the conveying belt to rotate according to the preset rotating angular speed; performing rotation measurement on the bipolar coil group to obtain measurement data of a plurality of measurement points; and analyzing the current distribution state of the to-be-measured crimping type IGBT device based on the plurality of measurement data. The bipolar coil assembly is compact in structure, small in size, easy to install and low in installation and measurement cost, and the current distribution state can be obtained more comprehensively and accurately.