27results about How to "Improve measurement repeatability" patented technology

The invention discloses an intermediate double-gear axial correction value measuring device, a measuring method and a grouping matching method, and the measuring device comprises a bottom plate, and a first support device, a second support device, a helical gear positioning tooth, a straight gear positioning tooth, a gauge stand device and a contact indicating device which are disposed on the bottom plate. The first support device, the second support device, the bevel gear positioning tooth and the straight gear positioning tooth are respectively provided with a contact indicating device, and the first support device, the second support device, the bevel gear positioning tooth and the straight gear positioning tooth are completely attached to the matching face of the measured middle double gear to form a circuit loop. According to the invention, the measurement efficiency can be ensured, the measurement stability can be enhanced, the measurement difficulty is reduced, the measurement efficiency is improved, the measurement repeatability and consistency are improved, and the condition that the vibration value of the whole machine exceeds the standard or the meshing part is abnormally damaged or even scrapped due to poor meshing of gears caused by inaccurate measurement is effectively avoided.

The invention discloses a semiconductor measuring device and a semiconductor process system, and the semiconductor measuring device comprises a detection light path unit which is suitable for providing an incident light beam focused on the surface of a wafer to be measured; and the light splitting unit is suitable for splitting an emergent light beam excited by the incident light beam on the surface of the wafer to be detected into at least two measuring light paths, and the measuring light paths respectively enter different detection / measurement receiving ends so as to carry out defect detection, image focusing or / and film thickness measurement. The semiconductor measurement equipment provided by the invention can provide various detection / measurement functions, and is compact and simple in structure.

The invention discloses an optical machine assembly surface shape in-situ detection device and method, belongs to the technical field of optical precision detection, and aims to solve the problem that in the prior art, surface shape distortion detection cannot be carried out on an optical machine assembly in the in-situ monitoring and adjusting process. In the device, laser generated by a laser sequentially passes through a beam isolator, a beam splitter prism and a collimating mirror A, then enters a to-be-tested optical machine assembly and is reflected, reflected light of the to-be-tested optical machine assembly passes through the collimating mirror A, then enters the beam splitter prism and is reflected, and reflected light of the beam splitter prism passes through a perforated optical screen, a collimating mirror B and a phase plate and then enters a CCD camera; the CCD camera is connected with a computer system, and a light spot pattern recorded by the CCD camera is input into the computer system and used for surface shape in-situ detection. According to the method, reflected light of a to-be-measured sample is modulated through a phase plate, and sample surface shape reconstruction is achieved through a phase reconstruction algorithm based on light field diffraction iteration. The method has the advantages of high measurement precision, no need of a reference plane, high vibration resistance and the like.

The invention discloses a wafer-level test probe station environment temperature calibration method, system and device and a medium. The method comprises the steps that a heat conduction block is controlled to be placed at any test point position on the surface of a probe station tray; the detection part of the control temperature sensor is inserted into the hollow hole channel of the heat-conducting block; the probe station is controlled to be heated to a target temperature value, and temperature time sequence data are collected through a temperature sensor; when a temperature stable state is reached, calculating a temperature calibration difference value based on the temperature time sequence data; controlling each test point of the heat conduction block and the temperature sensor on the surface of the tray to obtain a temperature calibration difference value of each test point; and according to the temperature calibration difference value of each test point, determining an overall temperature calibration value and carrying out temperature calibration. According to the invention, the problems that errors are caused by small contact area in traditional contact measurement, and temperature stable nodes cannot be judged and the uniformity of a tray temperature field cannot be evaluated are solved, the temperature quantification precision and calibration accuracy of a wafer-level test environment are improved, and the reliability of a chip test result is guaranteed.

The invention provides a pollutant spatial distribution and blow-off and tempering limit measurement method based on a flat flame burner, and relates to the technical field of combustion experiment measurement. According to the method, on the basis of a flat-flame burner, a quartz cover is arranged above the flat-flame burner to form a locally-closed space, and a long-strip-shaped measuring window is formed in the side face; an X-Y plane movable precision probe structure is arranged on the outer side of the window, so that the tip of the sampling probe can extend into a region adjacent to the flame at any coordinate point in the window plane; a camera is arranged on the outer side of the quartz cover, and a camera pixel coordinate probe physical coordinate conversion relation is established through calibration; controlling the probe to move point by point according to a preset scanning path, synchronously collecting pollutant concentration and flame images, and obtaining a pollutant two-dimensional or three-dimensional distribution field under a given working condition; parameters such as gas flow and air-fuel ratio are adjusted, the blow-off / tempering limit is approached and crossed, scanning is repeated at key nodes, and pollutant distribution characteristics in different combustion stability states are obtained.

The invention relates to the technical field of gear detection, in particular to a bevel gear parameter measuring mechanism and a bevel gear parameter measuring method.The bevel gear parameter measuring mechanism comprises a first probe, a second probe, an auxiliary sphere and a positioning tool, the first probe is provided with a first sphere, and the diameter of the first sphere is the same as that of a first set sphere which is located at the large end of a tooth groove and makes contact with the two side faces of the tooth groove of a bevel gear; the second probe is provided with a second ball body, and the second ball body has the same diameter as a second setting ball contacted with the two side surfaces of the tooth groove of the bevel gear and the first setting ball; the auxiliary ball body and the first setting ball have the same diameter; the positioning tool is provided with a tool surface which is matched with the mounting surface of the bevel gear in shape and is tightly jointed with the mounting surface, an upper end surface which is used as a measurement reference surface, and an inner wall which is in contact with the first sphere or the auxiliary sphere. By adopting the measuring mechanism provided by the utility model, the M value and the M value of the bevel gear can be accurately measured.

The present application relates to the field of optical detection technology, and more particularly to a multi-probe centering detection method, which drives a standard spherical lens to rotate, and synchronously completes optical data acquisition by means of multiple independent detection light paths; respectively fitting the data collected by each channel to obtain the corresponding spherical center rotation track of each channel; relying on the spherical center track, solving the spherical center difference of each channel relative to the rotation reference axis, and repeatedly performing the calibration process to obtain the measurement standard deviation of each channel; replacing the measured lens and repeating the detection process to obtain the spherical center track and the spherical center difference; combining the measurement standard deviation of each channel, the consistency error of the measured spherical center difference and the track circle fitting residual error to calculate the fusion weight of each light path channel; based on the obtained weight, using the weighted least squares method to fuse the effective spherical center difference data and output the comprehensive spherical center difference of the measured lens. The present application adopts a multi-light path synchronous detection and data weighted fusion scheme, effectively suppresses the random error and system error of a single channel, and improves the overall measurement accuracy of the lens spherical center deviation.

The present application relates to the technical field of profile measurement, and particularly relates to a pipe blank inner profile measurement device and a measurement method. The pipe blank inner profile measurement device comprises a pipe blank supporting mechanism, a cantilever mechanism, a laser measurement module, a rotation angle measurement module and a data acquisition and control system. The pipe blank supporting mechanism is used for supporting and positioning the pipe blank. The cantilever mechanism comprises a cantilever. The laser measurement module is used for entering the pipe blank to obtain ranging data under the driving of the cantilever. The rotation angle measurement module is used for obtaining the rotation angle data of the laser measurement module. The data acquisition and control system is used for obtaining the inner profile data of the pipe blank to be measured based on the ranging data and the rotation angle data. The present application is a non-contact measurement method, which does not cause damage to the surface of the measured object, is suitable for the measurement of precise parts and fragile materials, and can automatically complete the data acquisition, processing and analysis of the measurement process through the integrated data acquisition and control system, and the measurement efficiency is high.

This invention relates to the field of transducer technology, specifically to an integrated coupled piezoelectric ultrasonic transducer, comprising an aluminum alloy cylindrical shell; silver-impregnated electrodes on both the upper and lower surfaces of the sensing unit, which simultaneously excite longitudinal and transverse waves under high-voltage pulse excitation; a backing damping block for absorbing reverse sound waves and improving signal clarity; a stainless steel bottom cover fixed to the open end of the shell and tightly coupled to a piezoelectric ceramic sheet, serving as protection and sound wave transition; an integrated coupling layer consisting of a flexible solid coupling sheet pre-attached to the outside of the stainless steel bottom cover; and a magnetic fixing ring, a ring-shaped neodymium iron boron permanent magnet embedded in the shell, for providing attraction force to the ferromagnetic bolts to stabilize the coupling pressure. Its advantages include: extremely simplified structure, compact size and light weight, low cost, elimination of measurement errors, improved measurement repeatability, and greatly simplified on-site operation procedures.

The application discloses a kind of based on light field diffraction iteration's spherical element surface shape reconstruction system and method, it is related to the detection of spherical element surface shape in optical detection technical field, its purpose is to solve the technical problem of high measurement cost, low measurement efficiency caused by the surface shape measurement method needing reference plane in prior art when spherical element surface shape reconstruction.Light is divided into two ways after spectroscope, one way of transmission light is absorbed by light trap to avoid forming stray light, another way of reflection light is finally recorded diffraction spot map by CCD camera after the spherical mirror to be measured, phase reconstruction algorithm based on light field diffraction iteration is used to realize spherical element surface shape reconstruction, obtain the surface shape distortion containing the error of spherical mirror to be measured, the surface shape distortion not containing the error of spherical mirror to be measured, finally obtain the surface shape error of spherical mirror to be measured, the whole process does not need the surface shape measurement method of reference plane, measurement cost is lower, measurement efficiency is higher, has great application prospect.

The utility model relates to the technical field of sensors, and discloses a measuring rod for a static magnetic grid linear displacement sensor, which comprises a measuring rod body and a support frame, the outside of the measuring rod body is connected with a protective assembly, the top of the support frame is connected with a guide assembly, and the top of the guide assembly is connected with a limiting assembly; compared with the prior art, the measuring rod for the static magnetic grid linear displacement sensor has the advantages that the measuring rod body can be guided to do linear motion and is prevented from shaking, shifting or swinging in the motion process, so that the measuring accuracy and repeatability of the measuring rod for the static magnetic grid linear displacement sensor are improved; the measuring rod body can be prevented from being corroded, abraded and collided by the external environment, and the reliability of the measuring rod for the static magnetic grid linear displacement sensor is improved. According to the measuring rod for the static magnetic grid linear displacement sensor, displacement of the measuring rod body under the action of external force can be effectively limited, unnecessary deviation or shaking of the measuring rod body is prevented, the fixed position of the measuring rod body after movement is kept, and the stability of the measuring rod for the static magnetic grid linear displacement sensor is improved.

The invention discloses a device and a method for testing crystal uniformity by using photoelectric characteristics. Comprising the following steps: presetting a plurality of different target detection wavebands, and scanning a target detection area of a to-be-detected crystal by using exciting light under each preset target detection waveband to obtain a fluorescence signal matrix; preprocessing the fluorescence signal matrix under each target detection waveband to obtain a fluorescence intensity distribution matrix, and extracting single-waveband uniformity parameters from the fluorescence intensity distribution matrix; and carrying out fusion processing on the single-band uniformity parameters under all the target detection bands to obtain a crystal uniformity parameter as a test result. According to the method disclosed by the invention, quantitative result output of global and local uniformity of the crystal uniformity is realized.

The invention discloses a vacuum glass heat transfer coefficient measuring method and device, and the method comprises the steps: placing to-be-detected vacuum glass in a vacuum chamber provided with a vacuumizing system and an air pressure detection device, enabling the air pressure detection device to display the air pressure value of the chamber in real time, and forming a uniform polarized light field perpendicular to the placement direction of the glass in the chamber; and during vacuumizing, the light spot is detected on the side, opposite to the light source, of the glass through a polarization analyzing polaroid, the air pressure value P is recorded when the light spot disappears, and then the heat transfer coefficient is calculated according to the air pressure value P. Based on the photoelastic principle, the air pressure in the vacuum glass is determined by observing stress light spot changes, then the heat transfer coefficient is accurately calculated, the method is not affected by the environment temperature, measurement repeatability is good, measurement can be rapidly completed, the measurement efficiency and accuracy are greatly improved, and the method is suitable for popularization and application. And the urgent requirement of the vacuum glass production detection field on accurate measurement of the heat transfer coefficient is effectively met.

The application discloses an oil saw guide plate flatness and groove wear image measurement method and system, relates to the technical field of machine vision image measurement, and the method obtains guide plate multi-source fusion image data through the cooperative collection of a line laser projection and coaxial light source illumination, calculates the flatness deviation by using three-dimensional point cloud reconstruction and reference plane fitting, adopts sub-pixel edge detection and multi-section statistical measurement to quantize groove wear parameters, fuses the flatness and groove wear indexes to calculate a comprehensive wear index and output a grading maintenance suggestion, and automatically generates a detection report, thereby providing an objective quantitative basis for oil saw guide plate quality detection.

The invention discloses a portable cigarette packet microwave moisture meter based on a compensation algorithm, which belongs to the technical field of material moisture nondestructive testing and comprises a planar microwave moisture sensor module, an array pressure sensor module, a data processing terminal and a multi-sensor cooperative compensation algorithm module deployed in the data processing terminal. The planar microwave moisture sensor module is used for detecting the dielectric property of internal tobacco leaves through the outer package of the tobacco bale in a non-contact mode and outputting initial measurement data of moisture of the tobacco bale. The consistency of measurement conditions each time is guaranteed through the pressure sensor, the influence of uneven density distribution in the tobacco bales is effectively compensated through combination of multi-directional measurement and a dynamic weighting algorithm, the overall measurement precision and repeatability are remarkably improved, non-contact and nondestructive detection is achieved through the planar microwave sensor, the tobacco bales and tobacco leaves are not damaged, and the measurement accuracy is improved. The detection speed is high, and the on-site real-time requirement is met.

The present invention is a micro wearable wristwatch-type non-invasive blood glucose monitoring system based on Raman spectroscopy, which relates to a wearable wristwatch-type system for non-invasive and rapid detection of human blood glucose concentration, and belongs to the field of non-invasive detection of blood glucose. The system integrates a near-infrared ultra-narrow bandwidth light source with a pigtail output, an avalanche photodiode (APD) for photoelectric conversion, and data processing and display into a wearable wristwatch, and is equipped with a test chamber of suitable size and ergonomics for finger fixation and Raman signal acquisition. Statistical algorithms are used to mine blood glucose Raman characteristic peaks and physical quantities related to blood glucose concentration, establish a linear relationship between spectral line peak intensity and concentration, optimize the data acquisition system and deconvolution algorithm, obtain high-precision blood glucose prediction results, and provide possibilities for clinical applications. The present invention will greatly simplify the steps of existing blood glucose detection, and has the advantages of high detection accuracy, simple operation, and wearability, and is of great significance in the field of wearable non-invasive blood glucose detection.

The invention discloses a low-temperature phase change material temperature field visualization test platform based on a schlieren method. The platform comprises a schlieren optical imaging system, a low-temperature Dewar and an image acquisition and processing system. In the schlieren optical imaging system, light emitted by a light source forms parallel test light beams through a beam expanding collimator, and the parallel test light beams penetrate through a low-temperature phase change material area in a sample cavity in a low-temperature Dewar system, then enter a convergent lens and form focusing light spots on a focal plane of the convergent lens; the blade is arranged at the focal plane and is used for partially cutting off a focusing light spot, so that light deflection caused by the refractive index gradient in the phase change material is converted into gray scale contrast change, and a schlieren image is recorded by the high-speed camera; and the image acquisition and processing system performs background correction, deflection angle calculation, refractive index gradient inversion, temperature gradient reconstruction and temperature field reconstruction on the schlieren image, and performs dynamic visual display. The invention provides a non-contact full-field visualization test means for researching low-temperature PCM phase change temperature field distribution and phase interface evolution.

The invention discloses a method and system for monitoring chloride ions in concrete, belonging to the technical field of concrete monitoring. The chloride ion monitoring system performs multi-point real-time monitoring on the chloride ion concentration inside the concrete through the linear relationship between the fluorescence wavelength change value and the chloride ion concentration. The chloride ion monitoring system comprises an excitation light source, a spectrometer, a filter, a fluorescent probe, and an optical splitter; the fluorescent probe is obtained by encapsulating cesium lead bromide with a porous polymer obtained by reacting octaallyl bromide-POSS with a diamine compound to obtain fluorescent nanoparticles, and click chemistry is performed under ultraviolet light reaction through double bonds in the outer layer of the fluorescent nanoparticles and double bonds on the surface after optical fiber cone modification and thiol, so as to obtain the fluorescent probe through photoplating.

This invention belongs to the field of flowmeter technology and discloses a method for optimizing the impeller of a turbine flowmeter. The method includes: S1: collecting data on the physical properties, operating range, and performance indicators of the medium through a system to establish clear design constraint data; S2: integrating streamlined and multi-lead design concepts, and determining the blade structural parameters through mathematical modeling and simulation analysis; S3: ensuring precise matching between the processing process and design objectives through parameter modeling, accuracy threshold setting, process coordination, and data linkage; S4: manufacturing an impeller prototype based on the processing technology, and calibrating the blade size and angle parameters using equipment; S5: verifying linearity and starting flow rate indicators through data acquisition and analysis, and iteratively optimizing design and processing parameters; S6: establishing a large-scale batch production process based on the optimized final parameters. This invention solves the problems of large starting flow rate, poor linearity, and insufficient consistency of metering accuracy in turbine flowmeters under low Reynolds number conditions.

The present invention discloses a non-contact flow measurement device and method for oilfield injection wells, the device includes an ultrasonic transducer control unit, a time difference measurement chip circuit, and a single-chip control circuit, the ultrasonic transducer control unit is provided with two and respectively on the upstream and downstream sides of the downhole pipe wall, an angle θ is formed between the two ultrasonic transducer control units, the receiving end and the transmitting end of the two ultrasonic transducer control units are respectively connected to the time difference measurement chip circuit, and the time difference measurement chip circuit is connected to the single-chip control circuit. The present invention adopts non-contact measurement and is not affected by medium pressure, so the parameters such as viscosity and density of the fluid have limited influence on it; it has strong high temperature resistance and is suitable for various fluids, especially some fluids mixed with corrosive substances and high pH; it has high accuracy and sensitivity, a wide measurement range, good measurement stability and repeatability, and a wide range of applications.

The present invention relates to an extinction ratio tester calibration device with an adjustable extinction ratio in a wide range, which comprises a first light source with adjustable power, a second light source with adjustable power, a first polarizer, a second polarizer and a beam combining device, wherein the first polarizer is arranged on the optical path of the light emitted by the first light source, the second polarizer is arranged on the optical path of the light emitted by the second light source, and the light emitted by the first light source passes through the first polarizer and is combined with the light emitted by the second light source passing through the second polarizer in the beam combining device into a beam of light containing a pair of orthogonal polarized lights. The present invention adopts different independent lasers to work separately, can be applicable to narrow spectrum lasers, can perform more accurate calibration for extinction ratio testers in special application fields, and can control the working states of the two light sources separately, has a two-stage polarizer, can realize continuous adjustment of polarization degree in the range of 0-60dB, can also arbitrarily open a component of a certain polarization state, can use a common optical power meter to perform accurate power measurement, thereby determining the polarization state of the output light.

The application discloses a kind of round runout detection devices of shaft, including shaft body support, shaft body support, height adjusting mechanism and dial gauge;The shaft body support has two, is connected installation rail respectively, shaft body support is installed on each, one of the shaft body support side is equipped with driving motor;The shaft body support is symmetrically provided with a pair of support rollers along center line, and the two ends are matched with the shaft body support;Positioning sliding block is connected on the installation rail, and the top is installed dial gauge;The height adjusting mechanism is arranged between two shaft body supports, and the top surface is respectively connected with two shaft body supports.The height-adjustable shaft body support of the present application cooperates with the height adjusting mechanism, solves the problem that the traditional device is difficult to adapt to different diameter shaft parts, improves the convenience of clamping and measurement repeatability;Dial gauge is flexibly moved on installation rail by positioning sliding block, realizes multi-point, arbitrary position detection along axis, overcomes the defects of single measurement point and limited coverage of traditional fixed dial gauge.

The invention discloses a method for correcting a code gear error in gear double-sided meshing measurement and application, and the method comprises the steps: firstly adjusting a code gear and a product gear on a double-sided meshing measurement instrument to enable the code gear and the product gear to be meshed, and marking tooth spaces and teeth of the two gears in sequence; two gears are rotated in a double-face meshing mode, and a center distance data set during meshing is collected; the code gear staggered teeth and the product gear returning to the initial position are subjected to double-face meshing rotation again, and the center distance data set is obtained again; and obtaining an error correction value curve of the code gear according to the two groups of center distance data sets, and carrying out linear superposition on the double-meshing comprehensive deviation curve and the error correction value curve at the same phase to obtain a radial comprehensive deviation value of the product gear after the code gear error is corrected. According to the invention, the measurement precision and repeatability of double-sided meshing measurement are improved, and the influence of the self error of the code gear on the measurement is eliminated.

This invention discloses an intelligent shoulder joint range of motion measurement system and method based on multi-sensor fusion, comprising a hardware measurement unit and a smart terminal communicatively connected thereto. The hardware measurement unit includes: a trunk sensor module for fixing to the user's trunk to acquire trunk posture data; an upper arm sensor module for fixing to the upper arm on the same side as the shoulder being measured to acquire upper arm posture data; and a data processing and communication module electrically connected to the trunk sensor module and the upper arm sensor module, respectively, for receiving and processing the trunk posture data and the upper arm posture data, calculating the spatial relative posture angle of the upper arm relative to the trunk, and wirelessly transmitting the spatial relative posture angle to the smart terminal. This invention addresses the long-standing pain points of traditional goniometers in clinical practice, such as strong subjectivity, cumbersome operation, and inability to record dynamic processes.

The invention discloses semiconductor measurement equipment and a semiconductor process system. The semiconductor measurement equipment comprises a detection light path unit, at least one detection / measurement receiving end and a wafer bearing table, the detection light path unit is suitable for providing an incident light beam focused on the surface of a wafer to be detected; the incident light beam enters the surface of the to-be-detected wafer and is excited on the surface of the to-be-detected wafer to form an emergent light beam, the emergent light beam enters the detection / measurement receiving ends, and one of the detection / measurement receiving ends comprises an image sensing unit and a line scanning camera; the wafer bearing table is suitable for bearing the to-be-detected wafer on an XY plane below the objective lens assembly for detection, the objective lens assembly moves in the Z direction to adjust the distance between the objective lens assembly and the to-be-detected wafer, and the Z direction is perpendicular to the XY plane. The semiconductor measurement equipment provided by the invention can provide various detection / measurement functions, and is compact and simple in structure.

This invention discloses a method and system for discriminating and compensating for rust particle scattering in a dual-path colorimetric assay within the same pool, belonging to the field of water quality optical detection and colorimetric analysis technology. The method includes: S1, before adding the colorimetric reagent, acquiring the transmission signal and scattering signal before the reaction under a long optical path, calculating scattering characteristic parameters, and determining the rust particle scattering interference level; S2, selecting a long or short optical path based on the scattering interference level and a preset transmission lower limit threshold, and using an electromagnetic shutter to select the chosen optical path; S3, after adding the colorimetric reagent, mixing and performing a colorimetric reaction for a preset time; S4, acquiring the transmission signal and scattering signal after the reaction under the same optical path, calculating the differential absorbance and scattering change; S5, obtaining the corrected absorbance through scattering compensation; S6, converting the corrected absorbance into the target analyte concentration based on the calibration relationship corresponding to the selected optical path and outputting the result. This invention can reduce measurement deviations caused by rust particle scattering and expand its applicability.

The utility model provides a kind of torque wrench calibration loading lever device, belong to torque wrench calibration loading lever technical field, this torque wrench calibration loading lever device includes lever arm body, loading arm, support seat and force joint;The lever arm body is in slender strip structure, the loading arm is hinged connection with one end of the lever arm body by pivot axle, adjustable included angle is formed between the loading arm and the lever arm body, the support seat is fixedly arranged in the middle position of the lever arm body, the bottom of the support seat has plane support surface for carrying the weight of the lever arm body, the force joint is arranged in the other end of the lever arm body;It can solve the problem that the existing torque wrench calibration device cannot produce accurate torque output at force end after applying standard load when calibrating and loading due to unreasonable force arm proportion design between loading mechanism and supporting mechanism.