104 results about "Systematic measurement" patented technology

This disclosure extends to systems, apparatus, and methods related to digital tape measure systems including a digital angle-finder, which are able to record and store or transmit to an external device both a length measurement and an angle measurement. These measurements may be able to be recorded individually or together in one “capture” motion, such as pushing a “record” button. Such a system allows a user to easily record a length of material and an angle indicating where and how the material needs to be cut.In some illustrative embodiments, systems in accordance with the present disclosure utilized units of measurement that are displayed by the digital tape measure in a form that can easily be recorded by hand by simple visual reading of the numbers, while simultaneously allowing measurements from the system to be displayed or recorded by the onboard computer.

The embodiment of the invention provides a multi-agent cooperation system evaluation method and device, electronic equipment and a computer readable storage medium, and relates to the technical field of artificial intelligence. According to the method, quantitative evaluation is carried out on a collaborative planning process based on user task description, subtask description, a subtask expected result, agent description and a relation matrix; when planning evaluation meets a preset standard, further performing execution capability evaluation according to user task description, subtask execution results, expected and actual execution efficiency and resource consumption, and performing systematic measurement on cooperation efficiency of the multi-agent system in a planning stage and an execution stage through a quantitative scoring mechanism; and closed-loop optimization is formed in combination with human preference information, so that systematic and dynamic quality control of the multi-agent cooperation system in the whole task planning and execution process is realized, the objectivity and practicability of an evaluation result are improved, and the use experience of a user can be effectively improved.

The invention relates to the technical field of engine assembly testing, in particular to an error evaluation method of a complex measurement system. The invention provides an error evaluation method of a complex measurement system, which comprises the following steps of: S1, simplifying and customizing a standard sample piece of a complex object to be measured based on the critical dimension of the complex object to be measured; s2, performing calibration detection on the standard sample piece by adopting calibration equipment to obtain a calibration value of the standard sample piece; s3, detecting the standard sample piece by adopting the complex measurement system to be detected to obtain a detection value of the standard sample piece; and S4, according to the calibration value and the detection value, obtaining a precision evaluation value of the to-be-detected complex measurement system. According to the method, the measurement precision of the complex measurement system is evaluated through the standard sample piece, the accuracy of equipment precision evaluation is remarkably improved, the key assembly size of the to-be-detected complex object is detected, the detection precision of the to-be-detected complex object is remarkably improved, the assembly detection difficulty is reduced, and the assembly efficiency and quality are improved.

The invention relates to the technical field of steel wire rope state detection, in particular to a steel wire rope diameter measuring method and system based on event compensation correction. According to the technical scheme, the system comprises an imaging module, a boundary initial extraction module, a dynamic motion estimation module, a dynamic correction compensation module and a diameter calculation module. The imaging module comprises a traditional camera, an event camera, an optical component, a synchronous triggering device and a spectroscope. The traditional camera is used for collecting frame images of the steel wire rope. According to the method, on the basis of complementary advantages of an event camera and a traditional camera, systematic measurement deviation under the dynamic working condition is solved from the mechanism through an event-driven dynamic geometric compensation model, and quasi-static imaging dependence is broken through. The method does not need extra constraint or increase of frame rate, control cost and hardware complexity, avoids the problems of reduction of signal-to-noise ratio and the like, realizes high-precision stable measurement under high-speed and vibration working conditions, adapts to online monitoring of multiple industrial scenes, and is remarkable in practicability and application value.

The invention belongs to the technical field of laser volume calibration, and particularly relates to a laser volume calibration system for a laboratory portable pipettor, which comprises a volume calibration equipment main body and a calibration container, and is characterized in that the volume calibration equipment main body is integrated with an integrated optical measurement module, a data acquisition and intelligent processing unit and a man-machine interaction module; the height change of the liquid level center point can be accurately measured, the specific forms such as the contact angle, the curvature radius and the depth of the liquid level meniscus can be captured and analyzed in real time through images, the liquid level form correction module can accurately calculate the missing volume caused by the concave meniscus by using the parameters, and the accuracy of the missing volume is improved. According to the method, the actual liquid level height is calculated and compensated to the final actual liquid level height, the systematic measurement deviation caused by neglecting the geometrical shape of the meniscus in a traditional single laser ranging method can be fundamentally solved, the volume measurement precision is remarkably improved, and the calibration precision can be improved to a new level.

The embodiment of the invention provides an underwater vehicle positioning method based on a fitting sound velocity profile, and the method comprises the steps: forming a long baseline positioning system through a plurality of observation stations disposed underwater, and enabling an underwater vehicle to be located in a measurement range of the long baseline positioning system; an acoustic signal is transmitted to the observation station through the underwater vehicle, time delay measurement data is acquired, and the time delay measurement data refers to the difference value between the time when the observation station receives the acoustic signal and the time when the underwater vehicle transmits the acoustic signal; constructing a long baseline positioning system model based on time delay intersection; and performing iterative calculation on the long baseline positioning system model according to the time delay measurement data to determine the position of the underwater vehicle. According to the method, the G-N algorithm is improved, optimal position parameter estimation can be obtained through iteration, meanwhile, the proposed Gaussian kernel B spline algorithm can better fit the bending part of the sound velocity curve through parameter optimization, and a high-precision continuous sound velocity profile can be obtained. According to the technical scheme, the positioning precision of the underwater vehicle can be improved, and rapid development of the underwater Internet of Things can be promoted.

The invention relates to the field of cable detection, and discloses a cable oil film uniformity detection system based on machine vision, and the system comprises an active photoelectric illumination module which is used for generating a modulation optical signal of which the polarization state changes under a preset time sequence, and projecting the modulation optical signal to the surface of a cable; the synchronous photoelectric sensing and conversion module is used for receiving the modulated optical signal reflected by the surface of the cable and synchronously converting the modulated optical signal into a first electrical signal flow and a second electrical signal flow; wherein the first electrical signal flow represents multi-spectral intensity information of the reflected modulated optical signal, and the second electrical signal flow represents multi-polarization intensity information of the reflected modulated optical signal. By utilizing the sensitivity difference of the thin film interference model and the elliptical polarization model to the optical parameter change of the oil product, the systematic measurement error caused by batch replacement of the oil product or temperature fluctuation can be actively corrected, and the accuracy and long-term stability of the detection result are improved.

The invention provides a magnetic field intensity estimation method based on a dynamic decoupling sequence and machine learning assistance, and belongs to the field of precise quantum measurement. The defects of a traditional magnetometer estimation method in the aspects of calculation complexity, noise interference, precision and the like are overcome; according to the method, on the premise of reducing the data volume, a dynamic decoupling technology is introduced, interference of environmental noise on an estimation result is effectively reduced through signal decoupling, a de-coherence effect caused by environmental interaction is inhibited, measurement data of a magnetometer system is collected and preprocessed, and the estimation accuracy is improved. And then intelligent analysis and training are carried out on the preprocessed data in combination with a machine learning algorithm, and the accuracy of magnetic field measurement and the precision of magnetic field intensity estimation are remarkably improved through autonomous learning and optimization of an estimation model. The method not only improves the performance of the magnetometer system, but also expands the application range of the magnetometer system, especially the application in a complex system and a big data environment.

The invention relates to a measuring device for an ion monitoring system and a measuring method thereof, and relates to the technical field of petrochemical engineering. The measuring device for the ion monitoring system comprises a bracket, an outer shell, an inner shell, a driving piece, a detection electrode and a control end, a first cavity and a plurality of sampling channels which are communicated with each other are arranged in the outer shell; the inner shell is rotatably arranged in the first cavity, a plurality of sampling grooves are formed in the inner shell, and the plurality of sampling grooves are in one-to-one correspondence with the plurality of sampling channels; the driving piece is used for driving the inner shell to rotate, so that the sampling channel is communicated with the corresponding sampling groove; the plurality of detection electrodes are in one-to-one correspondence with the plurality of sampling grooves, and the detection electrodes can sense the target ion concentration of the to-be-detected medium in the sampling grooves and generate corresponding sensing electric signals; the control end receives the sensing electric signal and transmits the sensing electric signal to the server. According to the technical scheme disclosed by the invention, the measurement efficiency and the measurement accuracy can be improved.

This invention provides a dynamic weighted fusion system and method based on real-time error covariance closed-loop feedback. Addressing the contradiction between underlying physical coupling interference and the need for high-bandwidth dynamic response in non-stationary random environments for large-scale arrays, this invention utilizes a first-order Markov model to quantify the statistical coherence strength of individual observation units. Secondly, it implements physical-layer regularization constraints, eliminating bus capacitance interference and geometric phase deviation through a slope-constrained driving strategy and spatial consistency mapping. In high-frequency sampling environments of 208Hz and above, combined with transient discrimination logic based on full-axis spatial correlation, an analytical solution from a Lagrange optimized functional is used to establish a negative correlation mapping function between weight allocation and the real-time posterior error covariance trace, achieving dynamic gain suppression for non-stationary observation units. This invention achieves optimal fusion of large-scale redundant information while ensuring high-bandwidth real-time response, significantly improving the system's measurement accuracy and robustness.

The present application relates to the technical field of fluid measurement, and more particularly to a measurement method of an ultrasonic flowmeter, comprising the steps of: using a criterion function to perform calculation, and selecting a corresponding measurement mode according to a corresponding interval to which a calculation result belongs; selecting a time difference method measurement mode: selecting a bubble processing model according to a state interval to which a current bubble state belongs to process collected data; selecting a Doppler method measurement mode: constructing an anti-interference measurement model, and then using the anti-interference measurement model to process collected data; selecting a parallel mode of the two methods: pre-processing data collected based on the time difference method and the Doppler method; then re-processing the above steps based on the pre-processed data of the two methods, and then performing dynamic weighted summation calculation. The present application can realize accurate self-adaptation between different measurement modes when facing complex fluid environments, can reduce systematic measurement errors, and improve measurement accuracy.

The present application relates to steel wire rope state detection technical field, especially in kind based on event compensation correction steel wire rope diameter measurement method and system, its technical scheme includes imaging module, boundary initial extraction module, dynamic motion estimation module, dynamic correction compensation module and diameter calculation module, the imaging module includes traditional camera, event camera, optical component, synchronous trigger device and beam splitter, the traditional camera is used for collecting the frame image of steel wire rope, the present application relies on the complementary advantages of event camera and traditional camera, through event driven dynamic geometric compensation model, the systematic measurement deviation under dynamic working condition is solved from the mechanism, the breakthrough of quasi-static imaging dependence is broken through, without additional constraint or frame rate promotion, control cost and hardware complexity, avoid signal-to-noise ratio decline and other problems, realize high-precision stable measurement under high speed, vibration working condition, adapt to multi-industrial scene online monitoring, practicality and application value are remarkable.

This application provides a method for measuring the surface area of ​​a lithography machine and an optical system for the lithography machine, relating to the field of semiconductor manufacturing technology. The method includes: acquiring multiple stage heights measured by a z-axis interferometer at a preset frequency, and the initial surface height of the silicon wafer measured by a leveling and focusing system at a preset frequency, wherein the preset frequency is less than or equal to a preset threshold; performing error compensation on the measured height of each spot in each measurement cycle based on the stage height of each measurement cycle, obtaining the compensated height of each spot in each measurement cycle; obtaining the target height of each spot based on the compensated height of each spot in each measurement cycle; and performing fitting processing on all target heights to determine the actual surface shape information of the silicon wafer. This application, through multiple measurements combined with error compensation, effectively removes systematic and random errors caused by stage instability, improving the measurement accuracy of the leveling and focusing system and the authenticity of the silicon wafer surface shape information.

The application discloses a jitter auxiliary measurement precision enhancement method for space-based calibration, belongs to the technical field of electronic communication and signal processing, and comprises the following steps: receiving a continuous-time analog input signal from a space-based calibration system; injecting an artificial jitter signal with zero mean and subject to uniform distribution into the continuous-time analog input signal to generate a composite analog signal; performing multiple independent quantization observations on the composite analog signal by using a low-bit analog-to-digital converter, obtaining multiple quantization output values corresponding to discrete levels, calculating the arithmetic mean of the multiple quantization output values, and taking the arithmetic mean as a high-precision estimation value of the amplitude of the continuous-time analog input signal; and the jitter auxiliary measurement precision enhancement method for space-based calibration can greatly improve the measurement precision of the space-based calibration system without increasing the hardware power consumption and volume.

This application specifically relates to a method, apparatus, vehicle, and medium for testing the NVH performance of a drive half-shaft assembly. The method includes: testing the NVH performance of the drive half-shaft assembly based on target measurement points under target operating conditions, using a first target operating condition and / or a second target operating condition, and extracting NVH performance indicators based on the test results. Finally, if preset test targets are met, a test report on the NVH performance of the drive half-shaft assembly is generated. This solves the problems in related technologies where bench testing deviates from the vehicle's boundary conditions, failing to accurately reflect the NVH performance of the drive half-shaft assembly, and where road testing of the vehicle is difficult to accurately separate and locate the noise source of the half-shaft. Based on the constraints of the actual assembly state of the vehicle, the environment, and the vehicle's condition, a systematic measurement point layout is constructed, and standardized test conditions are executed, thereby achieving accurate testing of the NVH performance of the drive half-shaft assembly.

The invention discloses a product evaluation method, device and equipment and a medium, and the method comprises the steps: obtaining a product statistical parameter, a parameter limit value, and a measurement statistical parameter of a measurement system, and the measurement system is used for carrying out the product qualification measurement; determining the production risk probability of the product and the measurement risk probability of the product measured by the measurement system based on the product statistical parameter, the parameter limit value and the measurement statistical parameter of the measurement system; and obtaining an index value corresponding to the product evaluation index based on the production risk probability and the measurement risk probability.

The application discloses a forward drilling harmful gas emission drilling measurement integrated platform and relates to the technical field of tunnel construction. The platform comprises a detection device, a drilling machine and a drill rod arranged on the drilling machine. The detection device comprises a sleeve and a laser monitoring module, a shielding module and a gas flow rate monitoring module arranged on the sleeve. The platform further comprises a walking system, a lifting and angle adjusting system arranged on the walking system, a drilling platform arranged on the lifting and angle adjusting system and a drilling machine arranged on the drilling platform. The drilling machine and the sleeve are coaxially arranged and fixed on the drilling platform. The drill rod passes through the inner cavity of the sleeve. The application can save the steps of secondary installation, leveling, centering and fastening, reduce the preparation time before drilling, ensure high centering accuracy of the detection device and the drilling machine, avoid the angle between the laser light path and the drilling axis caused by manual centering error, prevent systematic measurement error and improve the accuracy of the final detection result.

This invention relates to the field of measurement platform technology, specifically a measurement platform with a leveling system, comprising: a base, a support frame fixed to the surface of the base, an adjustment seat provided on the surface of the support frame, a flip plate provided on the surface of the adjustment seat, a fixing ring provided on the surface of the flip plate, a first crossbar inserted into the end of the flip plate, a second crossbar fixed to the other end of the first crossbar, a nut provided on the surface of the second crossbar, a horizontal plate provided on the surface of the second crossbar, a connecting rod fixed to the end of the horizontal plate, and a pressing block provided at the other end of the connecting rod; the beneficial effect is that after the horizontal plate is pushed by the nut, it moves against the direction of the adjustment seat, and the horizontal plate drives the pressing block to move through the connecting rod, and the pressing block presses down on the surface of the force-bearing rod, so that the two sets of force-bearing rods drive the flip plate to stabilize on the surface of the adjustment seat, and the position of the fixing ring can also be stabilized when the measuring instrument is fixed on the surface of the fixing ring.

The present invention belongs to the technical field of power plant gross error identification and discloses a method, system, device, and medium for identifying gross errors in power plant system measurements. The method comprises the following steps: obtaining power plant system measurement data for which gross errors are to be identified; and performing predictions based on the obtained power plant system measurement data using a trained prediction model for the gross errors of the power plant system to obtain a gross error identification result. This invention specifically provides a method for intelligently identifying gross errors in power plant system measurements based on a multi-classification support vector machine (SVM). The method is capable of quickly and accurately identifying gross errors in the system and directly determining the location of fault points.

The invention discloses a subsynchronous oscillation detection and traceability method and system for a wind power grid-connected system, and belongs to the technical field of oscillation traceability of the wind power grid-connected system.The subsynchronous oscillation detection and traceability method for the wind power grid-connected system comprises the steps that measurement data of the wind power grid-connected system is collected, and a subsynchronous oscillation data set of the wind power grid-connected system is constructed; an identification model is constructed based on the subsynchronous oscillation data set, the neural network estimation weight is adjusted, and a dynamic mode library of subsynchronous oscillation is established based on the converged constant neural network approximation model; and establishing a dynamic estimation model based on the dynamic mode library, calculating the residual error of the dynamic estimation model, identifying the operation mode of the wind power grid-connected system based on the residual error, and carrying out oscillation source positioning. According to the method, a dynamic model for describing a subsynchronous oscillation evolution law is established from data such as power grid voltage and current by utilizing deterministic learning, so that rapid detection and traceability of a subsynchronous oscillation mode are realized.

1. The name of the design product: OCT measurement instrument. 2. The use of the design product: OCT measurement instrument for laser welding head penetration detection system. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: Design 1 perspective view 1. 5. Design 1 is designated as the basic design.

The invention relates to the technical field of robot vision three-dimensional measurement, and discloses a three-dimensional measurement path planning method and system based on AGV and mechanical arm collaboration, and the method comprises the following steps: firstly, dividing a measurement viewpoint of a three-dimensional scanning measurement system into a horizontal viewpoint and a vertical viewpoint; secondly, according to the physical parameters of the AGV, the mechanical arm, the three-dimensional scanning measurement system and the to-be-measured part, a double-loop AGV motion path is constructed; then, generating an initial AGV measurement site set on the path according to a fixed step length; then, optimizing the measurement sites by using a local optimal measurement viewpoint clustering algorithm to obtain a final measurement site set; and finally, aiming at each measurement site, generating a motion path of the mechanical arm by adopting a shortest distance priority loop-free planning algorithm. By reasonably dividing the measurement viewpoints and optimizing the measurement path, the efficiency and accuracy of robot vision three-dimensional measurement are improved, and the risk that a mechanical arm collides parts in the measurement process is also avoided.

The present application relates to the technical field of density sensor, particularly relates to an overflow type density sensor, which comprises a measuring tube, the upper end of the measuring tube is fixedly installed with an overflow weir for liquid overflow, the side of the measuring tube is provided with a fixed density detector near the lower position, and the outer side of the measuring tube is provided with a mounting cap wrapping the overflow weir near the upper position. The second locking screw column is screwed, so that the measuring tube and the rotating ball are rigidly locked, the posture is fixed, the leveling process ensures that the constant measuring liquid level surface physically locked by the overflow weir is in a horizontal state, and then the vertical height difference between the two pressure taking points of the density detector is kept at a design value. The design converts the complex field installation reference calibration problem into a simple mechanical leveling and locking operation, so that the instrument can obtain the measuring reference accuracy on various complex pipeline layouts, and effectively solves the systematic measurement error caused by the installation inclination of the traditional sensor.

A kind of optical computing chip energy efficiency ratio measurement method and device, the main steps of the method include: determining the kind of active device in optical computing chip;Respectively calculate the power consumption value of high-speed optoelectronic modulator, phase shifter, photodetector;The total power consumption of optical computing chip is obtained by adding these power consumption values;The energy consumption ratio of optical computing chip is calculated by the ratio of the computing power value of optical computing chip and total power consumption value.The method and device form a systematic measurement method for the energy consumption ratio of optical computing chip, solve the problem of current photonic computing chip energy efficiency ratio index measurement method ambiguity, realize the reliable measurement of optical computing chip energy efficiency ratio index, provide an important basis for the design optimization of optical computing chip.

The invention belongs to the technical field of inertial navigation, and discloses a measurement method and system of an inertial navigation system.The method comprises the steps that the endpoint positions of two inertial navigation robots at the two ends of a measured pipeline are obtained, and posture information and advancing speed information of the two inertial navigation robots are collected; determining advancing tracks when the two inertial navigation robots meet, and extracting final positions of the two advancing tracks; according to the final positions of the two advancing tracks, determining position deviation, and determining initial correction of the two advancing tracks; preliminarily correcting the two advancing tracks according to the preliminary correction values of the two advancing tracks to obtain two preliminarily corrected advancing tracks, and splicing the two preliminarily corrected advancing tracks to obtain a spliced track; according to the end point positions at the two ends of the measured pipeline and the spliced track, determining the mileage correction amount; and carrying out secondary correction on the spliced track according to the mileage correction to obtain a final track. The method has the advantage of high track measurement precision.

Method for providing measurement points (u) for measuring a physical system (2), comprising the following steps: - Providing (S1) several initial measurement points (ustart), each determined by an input value of an input quantity (E) or input values ​​of several input quantities (E) and each exhibiting a gradient with respect to one or more input quantities (E), wherein the measurement points are applied cyclically with a cycle time Δt, such that gradients of one or more input quantities result from the sequence of input values ​​of the input quantities at the successively applied measurement points, wherein differences between the input values ​​of an input quantity from one measurement point to the next determine the gradient of the input quantity E in question; - Successively selecting (S2) one of the initial measurement points (ustart) from a subset or all of the initial measurement points (ustart);- Generating (S3) a set of measurement points (u) depending on the selected initial measurement point (ustart), wherein the generated measurement points (u) are generated with increasing dynamic component, the dynamic component of the measurement point being determined by its gradient(t) = u(t) − u(t − 1) − t; - Applying the generated measurement points (u) to the physical system (2) and acquiring (S4) a resulting output quantity (y), wherein the generation and application of the measurement points (u) based on a selected initial measurement point (ustart) is carried out until the resulting output quantity (y) violates a predefined limit condition.

A method for measuring and calibrating installation errors of a star sensor and an inertial navigation system relates to the technical field of integrated navigation, and specifically comprises the following steps: establishing a star sensor body coordinate system, an inertial navigation system body coordinate system and a space reference coordinate system; the method comprises the following steps: constructing an attitude transfer model containing an installation error angle based on a coordinate conversion relation of a star sensor and an inertial navigation system in space; an observation equation is constructed on the basis of an attitude matrix output by a star sensor and navigation parameters output by an inertial navigation system, and online identification and calibration of installation errors are achieved in combination with a linear Kalman filtering algorithm. The method does not need to depend on external reference equipment, accurate solving of the installation error can be completed through measurement data of the star sensor and the inertial navigation system carried by a carrier, the method is suitable for an inertia / starlight integrated navigation system of an aircraft, and the three-axis installation error generated when the star sensor and the inertial navigation system are fixedly connected and installed can be accurately identified and calibrated.

Systems and methods for static and dynamic calibration may also be used to provide alignment of a measurement beam from an interference imaging (CI) measurement system with respect to a processing beam from a material processing system. In these systems and methods, the calibration measurement output may be obtained from the CI measurement system and / or an auxiliary sensor. Future measurements performed by the CI measurement system may be modified at least partially based on the calibration measurement output.

The application discloses a temperature field control method suitable for an inertial measurement system, adopts a multi-stage partition temperature field control strategy, and divides the system into two-stage temperature fields between an inner dome and an outer dome and a table body from outside to inside for partition temperature control; first-stage temperature field control is performed, a fuzzy control method is used to calculate corresponding heating piece heating duty cycles and fan rotating speed control instructions, and influence caused by external environment temperature fluctuation is effectively inhibited; second-stage temperature field control is performed, an extended observer is used to estimate disturbances of each temperature control point, and compensation is made to heating resistance heating duty cycle control instructions calculated based on a PID control method, and influence caused by complex coupling heat sources in the system is effectively inhibited; compared with other temperature field control methods of the inertial measurement system, the application realizes real-time control of the temperature field of the system, reduces measurement errors of inertial instruments caused by temperature field fluctuation, and further improves the measurement precision and long-term stability of the inertial measurement system, and has important significance for improving long-term navigation precision.

The utility model provides a measuring precision detection device for a binocular distance measuring system. The device comprises a stepping motor, a coupling, a target point fixing plate, a screw rod sliding table, a driving plate and a motor driver, wherein the driving plate, the motor driver and the stepping motor are in communication connection in sequence, the stepping motor is connected with a lead screw of the lead screw sliding table through the coupler, and the target spot fixing plate is fixed to a sliding table body of the lead screw sliding table. The binocular distance measuring system measurement precision detection device driven by the stepping motor and the screw rod sliding table is designed, the target spot can move according to a given displacement curve, the target spot displacement curve measured by the binocular distance measuring system is compared with the given target spot displacement curve, the measurement precision of the binocular distance measuring system is obtained, and the measurement precision of the binocular distance measuring system is improved. Therefore, the measurement precision of the binocular ranging system is detected. Compared with a general precision detection scheme, due to the fact that the stepping motor and the lead screw sliding table are adopted, motion precision is extremely high, detection reliability is high, and cost is low.