42 results about "Reference measurement" patented technology

The invention discloses a self-calibration and drift compensation method for an automatic underground water monitoring station, and the method comprises the following steps: 1, transmitting a reference measurement starting instruction to an underground bubble method device by an edge calculation gateway, forming a reference data pair by a bubble method water level reference value and a reference acquisition moment, and writing the reference data pair into a reference data cache region; 2, the edge computing gateway creates a state storage structure and a covariance storage structure; and step 3, the edge computing gateway reads a drift amount estimation value from the state storage structure as a drift compensation amount, and when a drift estimation standard deviation exceeds a set threshold, bubble method hardware reference acquisition is triggered. According to the invention, the problems of high manual calibration cost and lack of independent reference support in pure software estimation in the prior art are solved, so that a monitoring station can stably operate for a long time under an unattended condition and continuously output high-precision underground water level monitoring data.

The invention provides a large-length-diameter-ratio expansion arm space pose measurement method, and the method comprises the steps: taking a short-side high-precision cubic mirror as a reference measurement and transmission object; the reference of the driving joints at the two ends of the unfolding arm and the matrix parameter of the cubic mirror are obtained through the automatic detection method of a high-precision space coordinate measuring instrument, the calibrated reference matrix parameter can be transmitted to optical collimation fusion laser tracking measurement, and the requirement for integrated measurement of the driving joints and the arm lever can be met; the reference systems of the driving joints at the two ends of the unfolding arm are obtained in the same global reference state through optical collimation and laser tracking, the spatial pose measurement of the large-length-diameter-ratio unfolding arm is achieved through data fusion analysis, and the detection requirements of measurement objects of different sizes, different diameters and different length-diameter ratios are met.

The invention discloses an automatic reference volume method measurement system and method for performance assessment of a water electrolysis hydrogen production system, and relates to the field of gas flow metering and performance testing. Comprising a main gas inlet pipe, a main gas outlet pipe, a plurality of reference measurement units connected between the main gas inlet pipe and the main gas outlet pipe in parallel, an intelligent fluid switching matrix used for controlling on-off and flow direction of gas, and a controller electrically connected with the reference measurement units and the intelligent fluid switching matrix, the reference measurement units are used for collecting temperature-time sequence data and pressure-time sequence data in real time, and the controller is used for controlling the valves in the intelligent fluid switching matrix to act according to a preset time sequence, so that the plurality of reference measurement units carry out cyclic relay type geovolumetric method measurement in an assessment period. And the average flow in the assessment period is calculated according to the temperature-time sequence data and the pressure-time sequence data collected by each reference measurement unit in each cycle. According to the invention, automatic and high-precision measurement of a large-flow scene can be realized.

The invention discloses a combustible gas non-inductive detection camera system integrated with a spectrum sensor, and relates to the technical field of gas imaging detection, and the combustible gas non-inductive detection camera system comprises the following steps: establishing multi-source observation through a reference measurement frame which shares at least part of an optical link with a main imaging light path, and outputting a fixed reference area statistical abstract, a temperature observation vector and a reference data effective mark; updating the drift state quantity based on the statistical abstract and the temperature observation vector and generating a stability field; performing drift compensation on the infrared image sequence according to the drift state quantity and the stability field, and generating an operation envelope field, a quantization result, a confidence interval and error source decomposition; and finally, executing gating output and writing back scheduling parameters. According to the scheme, continuous connection of reference observation, drift estimation, quantitative judgment and feedback scheduling is achieved, and the output stability, the quantitative credibility and the continuous operation capacity under the fixed online detection condition are improved.

The invention relates to a strapdown inertial navigation system reference-free initial alignment absolute precision calculation method, and belongs to the technical field of inertial navigation. According to the method, the initial alignment precision of the strapdown inertial navigation system can be accurately calculated only through a simple two-position rotation method by applying a specific attitude tracking algorithm in an environment without reference measurement equipment. The method effectively solves the problem of excessive dependence of previous precision calculation on a test environment and equipment, and breaks through the limitation of a traditional method. The method can be widely applied to initial alignment precision calculation of the strapdown inertial navigation system in various scenes, the calculation cost is greatly reduced, the calculation efficiency is remarkably improved, and powerful technical support is provided for development and application of the strapdown inertial navigation system.

This invention discloses a multi-condition self-traceable calibration method and system for insufflators, relating to the field of insufflator metrology technology. The method includes: constructing a standard loop to apply back pressure and inject a controllable leakage; during a continuous calibration, controlling the insufflator under calibration to sequentially enter pressure stabilization, flow stabilization, and leakage disturbance conditions, synchronously collecting data through collaboratively working traceable pressure and flow references; comparing the reference measurements with the insufflator's readings to calculate pressure coupling error, flow coupling error, and dynamic response characteristics; performing standard state conversion based on preset standard pressure and temperature, fitting and generating calibration coefficients to correct the measured values, and generating a judgment result based on comparison of coupling error and dynamic response characteristics with preset thresholds; generating an automatic report including operating condition type, residual, final calibration measurement results, and uncertainty. This invention improves calibration accuracy and traceability through three-condition linkage calibration and environmental factor compensation.

The application relates to a multi-dimensional alarm analysis method and system based on an alarm platform, and relates to the field of water meter detection, which comprises the following steps: collecting water meter measurement values and historical measurement data in response to a water meter detection signal; calling historical measurement values based on the historical measurement data; generating a reference measurement interval based on the historical measurement values and a reference deviation value; collecting current temperature and pressure parameters when the water meter measurement values do not fall into the reference measurement interval; generating a measurement deviation value based on the current temperature and pressure parameters; obtaining a water meter deviation value according to the water meter measurement values and the measurement deviation value; controlling a water meter self-checking device to perform measurement self-checking by a self-checking method and outputting self-checking information when the water meter deviation value does not fall into the reference measurement interval; reporting a water meter abnormality prompt when the self-checking information is consistent with abnormal information, and discarding the water meter measurement values collected this time. The application has the effect of reducing the false alarm rate of a water meter.

The embodiment of the invention discloses a phase distance measurement method and device, electronic equipment, a storage medium and a program, and the method comprises the steps: obtaining the distance between first reference measurement equipment and second reference measurement equipment; wherein the first reference measurement equipment is used for sending a first detection signal to the second reference measurement equipment and the phase distance measurement equipment; the phase distance measurement equipment is used for responding to the first detection signal and sending a second detection signal to the first reference measurement equipment and the second reference measurement equipment; obtaining measurement phases when the phase ranging device, the first reference measurement device and the second reference measurement device receive the detection signals; according to the distance between the first reference measurement device and the second reference measurement device and the measurement phase, the distance between the phase distance measurement device and the first reference measurement device and the distance between the phase distance measurement device and the second reference measurement device are calculated. According to the technical scheme of the embodiment of the invention, the ranging efficiency can be improved.

This utility model discloses a workpiece auxiliary positioning device for coordinate measuring machine (CMM) inspection, including a base, the top surface of which serves as a workpiece support surface, a vertically movable front positioning plate mounted on the front end surface of the base, and a vertically movable side positioning plate mounted on the side wall surface of the base. A front positioning plate guide mechanism and a front positioning plate locking mechanism are provided between the front positioning plate and the base, and a side positioning plate guide mechanism and a side positioning plate locking mechanism are provided between the side positioning plates and the base. This utility model, through the base in conjunction with the movable front and side positioning plates, enables relatively accurate positioning of the workpiece in different directions. This eliminates the need to recalibrate the measurement reference after changing the workpiece's placement orientation, effectively shortening the workpiece alignment auxiliary time, saving inspection personnel's auxiliary work time for workpiece alignment and reference measurement, greatly improving inspection efficiency, and reducing labor costs.

The invention provides a three-dimensional measurement apparatus, a three-dimensional measurement method, and a storage medium storing a three-dimensional measurement program. When acquiring three-dimensional data by a three-dimensional scanner, a user can easily know whether necessary three-dimensional data has been acquired. The three-dimensional coordinate generation unit sequentially generates three-dimensional coordinates of the measurement workpiece on the basis of the image including the pattern light generated by the scanner imaging section. The display control unit sequentially generates display data in which the three-dimensional coordinates of the measurement workpiece sequentially generated by the three-dimensional coordinate generation unit are superimposed on the three-dimensional shape based on the reference three-dimensional shape data registered by the registration unit. The three-dimensional data generation unit generates three-dimensional shape data of the measurement workpiece based on three-dimensional coordinates of the measurement workpiece. The measurement unit performs measurement based on the reference measurement element registered by the registration unit and the three-dimensional shape data of the measurement workpiece.

The application specifically relates to an interference measurement method, system, device and medium, the method comprising the following steps: S1: defining two interference components as component A and component B; S2: setting component B as a reference measurement component, and marking interference points formed by component A and component B on an interface; S3: marking a maximum interference point position of component A and component B as 5, marking a centroid position of component A as 6, and marking a centroid position of component B as 7; S4: connecting any two interference points, and the connecting line is an interference interface; S5: defining a direction away from the centroid point of component A as an interference direction according to a normal line of the interference interface; S6: picking up and measuring maximum distances of each point on component A to the centroid of component A according to the interference direction, and obtaining the maximum interference point 5; and S7: measuring a shortest distance h of the maximum interference point 5 to the interference interface, wherein h is the sought interference amount. The main beneficial effect is to improve the quality and efficiency of interference checking work.

An information processing device that predicts the state of a target component in a suspension in which biomolecules are dispersed as components in a liquid on the basis of spectral data obtained by measuring electromagnetic waves emitted from the suspension, the information processing device being provided with a processor, the processor performs: a process using a state prediction model corrected from reference spectral data obtained from a reference suspension in a reference measurement environment; a target spectroscopic data acquisition unit that acquires target spectroscopic data obtained from a target suspension in which the state of a target component is unknown in a target measurement environment different from the reference measurement environment; acquiring a correction coefficient derived by comparing the reference spectroscopic data corresponding to the target spectroscopic data and reference spectroscopic data obtained from the reference suspension in the target measurement environment; correcting the target spectral data according to the correction coefficient to generate corrected target spectral data; and causing the state prediction model to predict the state of the object component by applying the correction object spectral data to the state prediction model.

When the absolute value (|Tt−Tc|) of the difference between the turning time Tt of a log PW and the transport time Tc of the log PW is longer than a reference measurement time Ts, the turning-axis center line measurement time Tm is set to the absolute value (|Tt−Tc|) (Step S120), the rotation speed W of centering spindles 24a and 24b is set to a speed (Ws×Ts / Tm) lower than a reference rotation speed Ws, and also the measurement rotation angle α is set to an angle (αs×Ts / Tm) smaller than a reference measurement rotation angle as (Step S122). When the absolute value (|Tt−Tc|) is equal to or less than the reference measurement time Ts, the turning-axis center line measurement time Tm is set to the reference measurement time Ts (Step S116), the rotation speed W of the centering spindles 24a and 24b is set to the reference rotation speed Ws, and also the measurement rotation angle α is set to the reference measurement rotation angle αs (Step S118).

A communication method and device relate to the technical field of communication. In the method, a first reference measurement quantity corresponding to at least one moment based on a plurality of sub-regions contained in a first region and a first measurement result of a terminal in a current region are used for terminal positioning; compared with the prior art that the measurement information of at least three moments (generally, the interval between the at least three moments is long) needs to be acquired for terminal positioning, the method and the device can improve the positioning efficiency. In addition, the positioning precision of the terminal position is related to the granularity of division of the first region, and the first region is divided into the fine-grained sub-regions, so that the positioning accuracy is improved.

This invention discloses an automated reference volumetric measurement system and method for performance evaluation of a water electrolysis hydrogen production system, relating to the field of gas flow metering and performance testing. The system includes: a main inlet pipe, a main outlet pipe, multiple reference measurement units connected in parallel between the two, an intelligent fluid switching matrix for controlling gas flow and direction, and a controller electrically connected to the reference measurement units and the intelligent fluid switching matrix. The reference measurement units are used to collect temperature-time series data and pressure-time series data in real time. The controller controls the valves in the intelligent fluid switching matrix to operate according to a predetermined sequence, enabling the multiple reference measurement units to perform cyclic relay volumetric measurements within the evaluation period. The average flow rate within the evaluation period is calculated based on the temperature-time series data and pressure-time series data collected by each reference measurement unit in each cycle. This invention enables automated, high-precision measurement in high-flow-rate scenarios.

A leak detection method (100) comprising: - a learning step (101) during which at least one reference measurement signal representative of the flow or concentration of tracer gas in a reference test object (A) or in an environment surrounding a reference test object (A) is measured during at least one leak test cycle (C), - a plurality of successive test steps (102) during which a measurement profile representative of the flow or concentration of tracer gas is measured using the leak detector (1) during at least one leak test cycle (C) and compared with the reference profile to provide, based on the result of the comparison, a similarity indicator allowing the presence of an anomaly to be deduced. Figure 1

A wafer thickness measurement device of the present invention obtains, based on: first and second interferometer reference measurement results obtained by measuring, with an A-surface optical interferometer and a B-surface optical interferometer, a reference measurement point on a reference piece having the reference measurement point at which the reference piece has a known thickness; first and second distance meter reference measurement results obtained by measuring the reference measurement point with an A-surface distance meter and a B-surface distance meter; first and second interferometer measurement results obtained by measuring a measurement point of the wafer with the A-surface optical interferometer and the B-surface optical interferometer; and first and second distance meter measurement results obtained by measuring the measurement point with the A-surface distance meter and the B-surface distance meter, and obtains a thickness, of the wafer, at the measurement point.

Techniques are described for complex preprocessing steps to ensure consistency of sorted sets of reference measurement data, which have conventionally been required when sorting reference measurement data sets for DPG algorithms captured using an EPI technique, to be omitted because items of reference measurement data captured via the described techniques are already consistent in themselves. Therefore, for each polarity of the read-out gradients, a set of fully sampled reference measurement data is available, which is already suitable for carrying out a dual-polarity (DP) algorithm without any further measures.

The invention discloses a high-precision full-field inclination calibration system and method for shearing speckle interference. The system comprises an integrated composite calibration target mirror, a two-dimensional piezoelectric deflection driving module, a photoelectric auto-collimation measurement module and a control and data processing unit, the measuring surface of the composite calibration target mirror is divided into a central rough scattering surface and an annular smooth reflecting surface. In the calibration process, the piezoelectric deflection driving module is used for inducing the target mirror to generate high-precision two-dimensional inclination deformation, the photoelectric auto-collimation measurement module is used for obtaining the absolute inclination angle of the target mirror in real time through the smooth reflecting surface to serve as a reference, and meanwhile the shearing speckle interferometer to be calibrated is used for collecting interference data of the rough scattering surface. And the control unit is used for carrying out full-field comparison and calculation on the two data to realize error correction. Physical space alignment of benchmark measurement and speckle measurement is achieved through the double-function area target mirror, the problems that traditional calibration precision is low, and full-field coverage cannot be achieved are solved, and the device has the advantages of being compact in structure, high in repeatability and high in adaptability.

The utility model discloses a height-adjustable reference measuring device, which belongs to the field of measuring tools and comprises a storage box, a support slide rail, a hard ruler body and a locking piece. The storage box comprises a storage cavity with an upward opening; the supporting sliding rail is vertically arranged and fixedly connected with the outer side wall of the storage box in a detachable or non-detachable mode. The ruler body comprises a ruler body and a reference measurement mark arranged on the surface of the ruler body; the ruler body is slidably connected with the supporting slide rail in the vertical direction. And the locking piece is configured to lock the ruler body and the supporting slide rail. The height measuring device is provided with a reference measuring mark, facilitates reading of constructors, can improve the intuition of height measurement in the construction process, and effectively improves the measuring efficiency.

A computer-implemented method for longitudinally monitoring a quality of data obtained from a measurement system configured to analyse a sample comprises the steps of receiving measurement data of a sample from a measurement system, subjecting the measurement data to data analysis, whereby at least one data parameter associated with the measurement data is obtained, and associating the data parameter with at least one reference data parameter associated with reference measurement data, and monitoring a quality of the measurement data based on the association of the data parameter with the reference data parameter. The method further comprises the step of receiving at least one operating parameter being associated with an operation of the measurement system and associating the operating parameter with at least one reference operating parameter being associated with a reference operation of the measurement system and monitoring the quality of the measurement data based on their association. Additionally or alternatively, receiving at least one sample parameter being associated with the sample and associating the sample parameter with at least one reference sample parameter being associated with the reference sample and monitoring the quality of the based on their association.

The invention discloses a complex casting installation pose error identification method based on scanning point cloud data. The method comprises the steps of standard block position setting and pose calibration, casting installation, point cloud data scanning, matrix conversion between a casting coordinate system and a standard block coordinate system, matrix rotation and translation vector solving, and solving of the rotation angle of a workpiece coordinate system relative to each axis of the standard block coordinate system according to the rotation matrix. According to the method, the casting in the clamping state and the standard block are scanned at the same time through the 3D camera, related coordinate point data are obtained in combination with point cloud analysis software, a rotation matrix and an offset vector of a coordinate system of the casting in the clamping state relative to a coordinate system of the standard block are obtained through a data analysis algorithm, and then the actual pose of the casting in the clamping state is obtained. Compared with traditional methods of multi-point tool setting, on-machine detection and the like, the method is suitable for workpiece pose automatic identification of small-allowance formed blanks and complex castings without reference measurement faces, and method support is provided for improving the cutting and grinding efficiency of the multi-process characteristics of the complex castings.

A method and apparatus are provided for calculating a position of a first device relative to a reference device for a current time. The method comprises obtaining first reference GNSS measurements, made at the reference device for a first time, obtaining the position of the reference device for the first time, obtaining first device GNSS measurements, made at the first device for the current time, and calculating a first relative position between the first device at the current time and the reference device at the first time. The method further comprises obtaining second reference GNSS measurements, made at the reference device for a second time subsequent to the first time, calculating a position change of the reference device from the first time to the second time, and calculating the second relative position between the first device at the current time and the reference device at the second time.

The invention discloses a method for monitoring and evaluating the form and position stability of a large-scale assembly tool. The method comprises the following steps: measuring to obtain coordinates of all targets to be detected and a reference measurement target relative to a laser measurement equipment coordinate system LCS; calibrating a reference coordinate system DCS; calibrating a transformation relation between a laser measurement equipment coordinate system LCS and a reference coordinate system DCS; calibrating three-dimensional theoretical coordinates of all the targets to be detected and the reference measurement target relative to a reference coordinate system DCS; establishing an intersection measurement coordinate system of each group of paired photographic measurement equipment 7, and calibrating transformation relationships between the coordinates of the first photographic measurement equipment and the intersection measurement coordinate system and between the coordinate system of the second photographic measurement equipment and the intersection measurement coordinate system in each group of paired photographic measurement equipment; measuring the photographic measurement equipment 7 by using each group to obtain three-dimensional actual coordinates of all targets to be detected relative to the reference coordinate system; and the form and position deviation of the large assembly tool is calculated, so that the form and position stability of the large assembly tool 1 is evaluated.

This invention discloses a coaxial switching optical path precision alignment device and method for spectral measurements. The method first establishes a principal optical axis reference and forms a standard reference spot in sample measurement mode. After switching to reference measurement mode, with the goal of detecting the position of the incident spot and the beam direction, the theoretical adjustment amount of the reflector is obtained by reverse decoupling calculation of the four-mirror folding optical path error. Combined with an output-priority strategy, the adjustment is finely adjusted step by step. Multi-objective weighted adaptive optimization and iterative calibration are performed until the coaxial error condition is met. After locking the parameters, stability is rechecked and long-term drift compensation is performed. This invention effectively solves the problems of inconsistent incident conditions in traditional optical path switching, reliance on experience-based trial and error in assembly and adjustment, and easy drift during long-term operation. It achieves precise coaxial matching of dual-mode optical paths, improving the repeatability and long-term stability of spectral measurements.

An algorithm, system and device for obtaining a pattern critical dimension, a storage medium, and a computer program product, the algorithm comprising: providing a to-be-measured pattern, the to-be-measured pattern comprising a to-be-measured pattern having a reference measurement position, the extension direction of the reference measurement position being parallel to the line width direction of the to-be-measured pattern; in the line width direction of the to-be-measured pattern, a measurement frame crossing the to-be-measured pattern is arranged, and the reference measurement position is located in the measurement frame; setting a plurality of measurement points along the boundary of the to-be-measured graph in the measurement frame; obtaining a first key size of the to-be-measured graph under the corresponding measurement point; acquiring a critical dimension curve graph of the to-be-measured graph based on the first critical dimension; acquiring a distribution mode of the critical dimension curve graph; and acquiring a second critical dimension of the reference measurement position based on the distribution mode and a rule for acquiring the critical dimension of the reference measurement position in the distribution mode. And the accuracy of obtaining the second key size of the reference measurement position is improved.

The application relates to a passive device full-automatic measurement and control method and system with self-calibration and dynamic compensation, and belongs to the technical field of passive device performance testing. The method comprises the following steps: inputting a test signal into a test path and controlling a preset switch matrix to cooperate with the conduction of the test path; the test path comprises a first signal path and a second signal path; the first signal path is used for connecting the test signal to a preset test channel in the switch matrix after the test signal passes through a measured passive device; the second signal path is used for directly connecting the test signal to a preset reference channel in the switch matrix; for each test channel, the difference between a reference measurement value output by the test signal before entering the test channel and the reference measurement value output by the test signal after entering the test channel and when passing through the reference channel is obtained, the actual measurement value output by the test signal when entering the test channel is corrected by using the difference, and the performance index of the measured passive device is calculated according to the corrected actual measurement value. The application has the effect of realizing the integration of calibration and testing.

The invention discloses a linear encoder precision compensation system and method based on error table compensation, and the system comprises a module pedestal, the module pedestal is provided with a multi-read-head linear magnetic encoder and a rotor sliding along the module pedestal, the rotor is provided with a magnetic scale cooperating with the multi-read-head linear magnetic encoder, and the magnetic scale is provided with a plurality of error tables. A high-precision reference measurement system is arranged on the module base and the rotor in a matched manner; the calibration data acquisition unit is used for synchronously acquiring position output information of the multi-read-head linear magnetic encoder and the high-precision reference measurement system; and the calibration module is used for controlling the rotor to move, calculating a position error and generating a static error compensation table. The system is high in cost benefit, the precision of magnetic drive module products produced in a large scale can be permanently improved only by adding a set of reusable reference measurement system in a factory leaving link, and the situation that each module is equipped with an expensive high-precision grating ruler is avoided.