36results about How to "Realize digital measurement" patented technology

The invention discloses an automatic measuring method for digitalized airplane assembly. The method includes the steps of determining the transforming relationship between all coordinate systems and an assembly coordinate system through measurement preparatory work, transforming theoretical coordinate values of all detection points under the airplane coordinate system to the assembly coordinate system to obtain theoretical coordinate values of all the detection points under the assembly coordinate system, and conducting automatic searching with the theoretical coordinate values of the detection points under the assembly coordinate system as initial light pointing points of a laser scanner to obtain actual coordinate values of all the detection points under the assembly coordinate system. Through the automatic measuring method, digitalized measurement of airplane components is achieved, the problems that the size of airplane space is large, the detection points to be measured are wide in distribution area, manual light guiding at a part of detection points is difficult, and the detection points need to be measured repeatedly in the assembly process are solved, one-off manual installation of a reflector is achieved, multiple automated measurement is achieved, manpower is saved, the measurement time is shortened, and the measurement efficiency and the assembly efficiency are greatly improved.

The invention discloses a temperature-controlled unsaturation high-pressure consolidometer, comprising a pressure chamber, a high-pressure loading device, a suction control device, a temperature control device, a digitization measuring device and a data acquisition device, wherein the pressure chamber is disposed in the high-pressure loading device; the high-pressure loading device is used for applying pressure to the pressure chamber; the temperature control device is covered outside the pressure chamber for controlling the temperature of the pressure chamber; the pressure chamber is also connected to the suction control device for controlling the suction of the pressure chamber; the digitization measuring device monitors the pressure, temperature and displacement of a sample, and transmits the data to the data acquisition device connected to the digitization measuring device for processing. In the invention, the high-pressure loading device, the suction control device and the temperature control device are combined to realize the experimental study of soil body change characteristics under a full suction range, and high temperature and high pressure conditions on the basis of the traditional unsaturation consolidometer. In addition, the digital measuring device and the data acquisition device are combined to realize the automatic acquisition of experimental data.

The invention relates to a method of digitalized measuring frequency in the restriction of sampling rate, and the technique is characterized in that AD conversion is carried out on the frequency signals to be measured; M concerted signals to be measured are in a group; data of two groups adjacent to two seconds are in cross-correlation to obtain a cross-correlation function value; the autocorrelation function values of the two groups are calculated; frequency deviation is calculated according to the cross-correlation amount, thus the actual frequency value of the signals to be measured is the sum of the nominal value and the frequency deviation amount. The invention solves the theory and the technical problem of frequency digitalized precision measurement and provides a full set of total solution for design and realization of frequency digitalized measuring instrument which has high precision and low cost and is based on the technique of a virtual instrument.

The invention provides a CIE1976L*a*b*color space determination method for chemical analysis of the color of liquid, and belongs to the technical field of measurement. The CIE1976L*a*b*color space determination method for chemical analysis of the color of liquid at least includes the step that two or more chemical reagents are added into a reaction vessel so that a chemical reaction can happen and the color can change after the reaction. The CIE1976L*a*b*color space determination method for chemical analysis of the color of liquid is characterized in that a color space method is used for measuring the changing process of the color of chemical reaction liquid. By means of the CIE1976L*a*b*color space determination method for chemical analysis of the color of liquid, digitized measurement of the color of chemical reaction liquid is achieved, measurement steps are simple, and automatic and batched large-scale detection can be achieved.

The invention provides a high-precision swinging friction coefficient measuring apparatus; a swinging rod is mounted on swinging axle of a bracket; a rotor is mounted on the end of the swinging rod; a friction film is provided at the bottom of the rotor; a friction test block is arranged at the vertical lower portion of the swinging axle; the apparatus is characterized in that: a, angle encoder coupled with the swinging axle is disposed at the position of the swinging axle; a force sensor is provided at the lower portion of the friction test block; the measuring data of the angle encoder and the force sensor are transmitted to the data collecting and processing device. The device of the invention utilizes the signals of the force sensor and the angle encoder to measure and calibrate the friction coefficient of the friction test block, which can solve the measurement tracing problem of the friction coefficient and has advantages of simple structure, high accuracy and good stability, etc.

The invention discloses a steering bearing shaft washer channel parameter measuring instrument and measuring method. The steering bearing shaft washer channel parameter measuring instrument is characterized in that a system support and a measuring platform are fixed on a system flat plate; a stepping motor, a ballscrew support, a first linear guideway, a second linear guideway and a grating scale are fixed on the system support; a sensor rack is fixed on the first linear guideway and the second linear guideway, and is connected with a slide block of a ballscrew and the grating scale; the motor is connected with the ballscrew through a shaft coupling and drives the ballscrew to rotate; a first sensor system, a second sensor system and a linear bearing are fixed on the sensor rack; a guide rod is connected with a positioning pressure head, and penetrates through the linear bearing to move up and down; and a pressure spring is arranged between the positioning pressure head and the linear bearing. For the steering bearing shaft washer channel parameter measuring instrument and measuring method, two radial sensors and one axial sensor are used to measure the size of a channel, so that digital measurement of the shaft washer channel parameter is realized; and the differential motion mode of a pair of sensors is used to measure, so that the measuring error caused by inaccurate left and right positioning of the shaft washer can be eliminated and measurement of the channel center distance can be realized at the same time.

This invention supplies a method of measuring mineral reflectivity and mine phase composition. First put mineral polished section on reflected light microscope for observation, by camera and image collecting card to obtain mineral picture to input computer;then utilize given reflectivity core sample to carry out k value standardization of image acquisition system at certain intensity of irradiance; finally by computer calculating reflectivity and mineral composition content, calculator execute as follows step;image preprocessing;abstract measuring point's R, G, B pixel value; Calculate reflectivity base on this invention supplied model, and count pixel point size in whole picture belong to mineral reflectivity interval; thereby calculate reflectivity and mineral composition content. This invention not only accuracy, quickly, large depress detecting personnel labor intensity and working hours;Furthermore has no need of external equipment, just need fixing corresponding software, to realize mineral image reflectivity's two-dimension visualization.

The invention provides a CIE1976L * a * b * color space method for sodium hydroxide solution preparation for chemical analysis and belongs to the technical field of measurement. The CIE1976L * a * b * color space method for sodium hydroxide solution preparation for chemical analysis at least comprises the steps that a sodium hydroxide reagent with the concentration to be detected is continuously added into a reaction container where a solution with phenolphthalein indicator is added, the color space method is utilized for measuring color changes of the chemical reaction solution with the phenolphthalein indicator, and digital end point titration is carried out. By means of the method, the color of the chemical reaction solution with the phenolphthalein indicator is digitally measured, the test steps are simple, and automatic and batch large-scale detection can be achieved.

The invention discloses equipment realizing quick measurement on a small assembling clearance. The equipment contains a base, a plurality of supports, a horizontal four-axis collaborative robot and anindustrial control computer, wherein the base is provided with grid lines and scale values, the supports are used for fixing and supporting a to-be-measured part and locating and placing the to-be-measured part according to the scale values, an industrial camera and a laser displacement sensor are mounted at the tail end of the horizontal four-axis collaborative robot by virtue of a connecting plate, and the industrial control computer executes the following operations: controlling the horizontal four-axis collaborative robot to move the industrial camera to a position above the to-be-measured part and controlling the industrial camera to obtain an image of the to-be-measured part, generating an interface used for confirming locating points on the image by a user and recording the locating points, controlling the horizontal four-axis collaborative robot to move the laser displacement sensor to the locating points and controlling the laser displacement sensor to measure data, and calculating height of the clearance according to the measured data. The equipment disclosed by the invention is high in precision and simple to operate, an operator can easily use after simple learning, and a production requirement of multi-variety and small-batch products can be met.

The invention discloses a non-contact soft soil large deformation displacement meter, which comprises a pipe body and a gauge head, wherein a rotary potentiometer is arranged in the gauge head. The displacement meter is characterized in that the two sides of a rotating shaft of the rotary potentiometer are provided with counterweights which rotatably and synchronously move with the shaft of the rotary potentiometer and a first synchronous mobile device; the counterweights and the first synchronous mobile device are located in the pipe body; a second synchronous mobile device are further arranged in the pipe body; the second synchronous mobile device is synchronized with the first synchronous mobile device; a push rod is connected with the lower end of the second synchronous mobile device;and the lower end of the push rod is connected with a mounting pawl. The displacement meter disclosed by the invention has the following advantages that the measuring process is free from construction interruption and artificial measuring error, the measuring range is wide (capable of reaching 1.6m), the precision is high, the measurement is convenient, the construction is safe, meanwhile, the cost is low, and the displacement meter is particularly suitable for the area of the soft soil foundation with large deformation of soil body.

The invention relates to a measuring apparatus for measuring main parameters of a high speed processing handle. High precision inductive displacement sensors are employed as measuring elements; the plurality of inductive displacement sensors are installed in a special-purpose measuring substrate; and error transformation and a dimension conversion mechanism are utilized, so that rapid and accurate measurement of multiple dimensions is realized. By utilizing the inductive displacement sensors, leads, a digital display instrument, a computer and professional software, measured data are connected to the digital display instrument by the leads and the digital display instrument displays measured dimensions and directly determines whether the dimensions meet the requirement or not; the measured data are transmitted to the computer for storage by the leads and are used as a basis for a quality analysis. According to the invention, the measuring apparatus has advantages of high precision, high speed, convenient usage and low manufacturing cost and the like.

The invention relates to an inductive probe for inducing an array structure of coils. The inductive probe consists of a metal core rod, a composite copper pipe, coil frameworks and space adjustment members, wherein the metal core rod is in a hollow structure; opposite rod body walls, vertical to the axis of the metal core rod, of the metal core rod are provided with thread holes penetrating from interior to exterior; the outer round wall of a metal core rod body is provided with coil framework thread passing grooves and oil flowing grooves; the composite copper pipe is sleeved outside the metal core rod, and the outer round wall of the composite copper pipe is provided with coil framework sliding grooves; the coil frameworks are provided with thread holes and coiling grooves, the coils are wound on the coiling grooves, the coil frameworks are arranged in an array mode and installed on the coil framework sliding grooves of the composite copper pipe, each coil framework consists of a transmitting coil and eight groups of receiving coils, and each group of receiving coils is composed of a main receiving coil and an auxiliary receiving coil; and the space adjustment members are installed between the adjacent coil frameworks. According to the invention, array and digital measurement can be realized, and detection curves with multiple longitudinal resolutions and multiple radial detection depths can be obtained.

The invention aims to provide a coordinate system data fusion and unification technology on the basis of the uncertainty, which is applicable to reduce the comprehensive transfer error of a laser radar in the large-size precision measurement and improve the accuracy of a measurement result. The coordinate system data fusion and unification technology is characterized in that the space optimal position of each transfer common point which is repeatedly transferred and the optimal station distribution position of the laser radar are optimized and calculated; the standard uncertainty of each point is calculated by the optimal space position of the transfer common point so as to establish an uncertainty range of a measured space, and thus, in the uncertainty range, the laser radar has the minimum comprehensive transfer error and the measurement result has the optimal quality.

The invention relates to a digital differential tension sensor based on a linear array CCD and a tension detection method using the sensor. The sensor includes a suspension beam made from elastic material. The inner end of the suspension beam is fixed. The middle of the right side and the middle of the back side of the suspension beam are each provided with a mirror reflection region. The outer end of the suspension beam is a free force bearing end. A first laser emitter and a second laser emitter are symmetrically arranged above and below the inner end of the suspension beam. Optical paths ofthe two laser emitters are inclined and face the mirror reflection regions. A first linear array CCD element and a second linear array CCD element that can sense laser reflected light are symmetrically arranged above and below the outer end of the suspension beam. Signal output ends of the two linear array CCD elements are electrically connected with a control circuit. Through differential calculation, the detection method obtains a relationship between tension and pixel offset of the linear array CCD elements to obtain the tension. The digital differential tension sensor is simple in structure and is high in detection precision, linearity and sensitivity, is convenient and reliable, and realizes digital measurement of micro-tension.

The invention discloses a laser long chord track smoothness detection device, and belongs to the technical field of track measuring instruments. The laser long chord track smoothness detection device comprises a cross beam, an auxiliary wheel and a walking wheel, wherein the auxiliary wheel and the walking wheel are located at the two ends of the cross beam; the auxiliary wheel is rotationally connected with an auxiliary longitudinal beam; the auxiliary longitudinal beam is movably inserted into one end of the cross beam; an adjusting wheel is in threaded connection with the auxiliary longitudinal beam; the bottom of the adjusting wheel is rotationally connected with the cross beam; a mounting longitudinal beam is fixed to the other end of the cross beam; the walking wheel is rotationally connected with the mounting longitudinal beam; a horizontal detection wheel is arranged at the bottom of the mounting longitudinal beam; a mobile platform driven by a stepping motor is arranged on the cross beam; and a digital receiving target and a detection target are arranged on the mobile platform. The laser long chord track smoothness detection device has the beneficial effects that the automatic collection of the laser center position and the analysis and optimization of the collected data are realized, the problems of human eye interpretation and insufficient measurement precision are solved; and the measurement of the elevation difference between the head point and the tail point in the track measurement is realized.

The invention provides a multi-joint measuring arm based digital measuring system and method for geometric characteristics of a guided missile. The measuring system comprises a guided missile supporting platform, a multi-joint measuring arm, measuring brackets and a data acquiring processing system, wherein the guided missile supporting platform is a platform capable of providing all missile support, so that the missile is guaranteed to meet requirements of a measuring state; the multi-joint measuring arm is a market mature product, has arm length greater than 3.5 meters, has measuring precision not smaller than 0.5 mm, and is used for acquiring coordinate values of each measuring point on the missile body; the measuring brackets are supporting structures of the multi-joint measuring arm,are fixedly arranged on the supporting platform, and are arranged front and rear separately; and the data acquiring system consists of a computer, a data line and data processing software, and is usedfor acquiring and processing the measured data of the measuring arm to form a measured report form. According to the multi-joint measuring arm based digital measuring system and the method provided by the invention, process flow is optimized, digital measuring is realized, and turnover, among stations, of the guided missile is reduced while efficiency is improved.

The invention relates to a digit direct-current electricity meter based on voltage-frequency converter (VFC) and single chip computer, wherein it is characterized in that: the tested current is converted into voltage signal to be sent to VFC; MCU tests the frequency and accumulates accounts the frequency f signal of VFC, via digit calculation, to obtain and display tested current and electricity value real time. The invention can be used in discharge and charge managements of large-capacity accumulator, to avoid over charging and discharging and evaluate the left electricity of accumulator. The invention has simple structure and low cost.

The invention relates to a method for measuring the jack height of a turbo generator set based on a TSI system. The method comprises the following steps of: adjusting the running mode of a turbo generator set jack height measuring process; stopping a jacking oil pump, measuring and computing the DC voltage changed quantity of a jack vibration sensor, and computing a displacement changed quantity according to the sensitivity coefficient of the jack vibration sensor; defining a vector X and a vector Y in a plane-coordinate system, and computing the component of the vertical coordinates of the X+Y, namely the jack height. The method is easy to operate, convenient, and practical, may reduce the safety risk of field operation, achieves digitalized measurement of the turbo generator set jack height, increases measurement precision, and enhances the operation reliability of the turbo generator set.

The invention provides a railway land monitoring method and device, and the method stores cadastral information based on a mobile device so as to realize digital consultation. A patrol track is acquired and recorded in real time through the mobile device, and the checking task is digitally managed. By setting the positioning points on the map displayed by the mobile device or acquiring the positioning information of the mobile device, the to-be-checked land parcel is positioned and surveyed, so that the boundary information of the to-be-checked land parcel can be quickly obtained and is compared and checked with the content recorded in the cadastre data, digital measurement and automatic checking are realized, and the working efficiency of auditing personnel is greatly improved.

This invention supplies a method of measuring mineral reflectivity and mine phase composition. First put mineral polished section on reflected light microscope for observation, by camera and image collecting card to obtain mineral picture to input computer;then utilize given reflectivity core sample to carry out k value standardization of image acquisition system at certain intensity of irradiance; finally by computer calculating reflectivity and mineral composition content, calculator execute as follows step;image preprocessing;abstract measuring point's R, G, B pixel value; Calculate reflectivity base on this invention supplied model, and count pixel point size in whole picture belong to mineral reflectivity interval; thereby calculate reflectivity and mineral composition content. This invention not only accuracy, quickly, large depress detecting personnel labor intensity and working hours;Furthermore has no need of external equipment, just need fixing corresponding software, to realize mineral image reflectivity's two-dimension visualization.

The invention discloses a gear rack unfolding wing experiment platform and an experiment method adopting the gear rack unfolding wing experiment platform, a piston cylinder capable of containing initiating explosive devices is installed on the experiment platform, the piston cylinder is connected with a piston rod, a rack is arranged at an end of the piston rod, and the rack is meshed with a gear on a wing panel. Therefore, thrust generated by the initiating explosive device can be converted into linear motion of a piston rod, a wing panel is driven to rotate through transmission between the gear and the rack, the motion form of the wing panel is similar to that of a folding wing on an aircraft, and a resistance device for hindering rotation of the wing panel is added to the wing panel; therefore, whether the types and the number of the initiating explosive devices meet the requirements or not is judged according to the resistance provided by the resistance device and a rotation angle of the wing panel, types and the number of the initiating explosive devices can be correspondingly adjusted according to requirements, and experiments are repeated for many times.

The invention relates to an installation and adjustment method of an imaging sensor, particularly relates to an imaging sensor image plane parallelism debugging system and method based on microscopic measurement, and aims to solve the problems that when the image plane parallelism of an existing imaging sensor is debugged, protective glass is scratched or damaged by a direct measurement method, the debugging precision is poor, the out-of-focus image quality of an imaging measurement method is fuzzy so that accurate calculation is not facilitated, and a workload is large. The debugging system comprises an eccentric instrument air floating platform, a four-dimensional adjusting table, an auxiliary tool, an eccentric instrument imaging microscope and a dial indicator. A to-be-debugged sensor assembly is installed on the four-dimensional adjusting table, and the eccentric instrument imaging microscope is arranged right above the to-be-debugged sensor assembly. The debugging method based on the debugging system comprises the following steps: leveling the eccentric instrument air floating platform; leveling a mounting flange of the to-be-debugged sensor assembly; testing numerical values of three points of the imaging sensor by using the eccentric instrument imaging microscope, and calculating a deviation value; and correcting the thickness of a cushion column according to the deviation.

The invention discloses an electronic measuring stick for cattle, and relates to the technical field of windows. The electronic measuring stick comprises a fixing sleeve, a display screen and a scalemechanism, wherein a storage battery is arranged in a lower part of interior of the fixing sleeve, a push switch and a charging interface are arranged in a lower part of exterior of the fixing sleeve,the display screen is installed on an outer side of an upper part of the fixing sleeve, the scale mechanism is installed on an upper part of the interior of the fixing sleeve, a first limiting rod isarranged on one side of a bottom of the fixing sleeve, a second limiting rod is arranged on one side of an upper portion of the fixing sleeve, and a third limiting rod is arranged on one side of an upper portion of the scale mechanism. The electronic measuring stick has beneficial effects that the electronic measuring stick can measure a telescoping length of a telescoping scale through arrangement of capacitive grating displacement sensors at top ends of the first, second and third limiting rods, and transmits the information to a data processing module, the data processing module can transmit the data to a data display module, and through arrangement of a display screen, measurement data can be displayed conveniently, and digital measurement is achieved.