317results about How to "Short measuring cycle" patented technology

The invention discloses a three-dimensional speckle strain measurement method, comprising: (1) speckle preparation; (2) camera calibration; (3) state information acquisition; (4) computational domaindesignation; (5) initial point setting; (6) speckle matching; (7) three-dimensional reconstruction; and (8) strain computation. By the above operation steps, the invention provides a three-dimensionalspeckle strain measurement method, which can effectively obtain high preciseness measurement results in measurements of material characteristic parameters such as full-field vibration measurement, dynamic strain measurement, high speed deformation measurement, fracture mechanics, impact excitation and dynamic material experiments. The invention has the characteristics of convenient measurement operation, high automation degree, exact and reliable results, high efficiency and non-contact measurement.

The invention relates to movable quick water automatic monitoring system. Particularly of the movable water quality inspection technique. It comprises the sampling section carried inside the boat with water pump and water tank, water intake tube connected with output end of the water jet aspirator on one of the side wall of the water tank, water outlet on the other side wall, water running out of the outlet for water quality inspection, exhaust pipe at the bottom of the water tank, inspection part with water quality inspector and GPS receiver, terminal settlement part with data collecting card for receiving water quality information of the water quality inspector, and working condition machine that transmits the water quality information and geological information to the telemanagement center through GPRS. It has quick, accurate feature for acquiring time and space location water quality data, quickly finding out the abnormal change of the water quality, with far reaching significance for big area water surface water quality monitoring.

The invention discloses an indoor full-automatic BRDF (bidirectional reflectance distribution function) measurement device. The device comprises a support panel, a support platform is provided with a horizontal turntable, a sample table is mounted in a central through hole of the horizontal turntable, the horizontal turntable is equipped with a lens bracket on which a lens rotary arm is arranged,a lens rotary arm end is equipped with a spectrograph lens, an optical axis of the spectrograph lens always points to the centre of the sample table, the support platform is further equipped with an optical source guide rail on which an artificial optical source is arranged, the artificial optical source always points to the centre of the sample table. The BRDF measurement device can effectively improve the positioning precision, reduces the measurement period, and improves the optical source collimation and uniformity so as to effectively guarantee the measurement precision.

The invention relates to the precision shaft angle measuring instrument precision detection filed, more particularly to an angle measurement precision detection apparatus of an encoder and a detection method thereof. The apparatus comprises a coupling assembly, a precision main shaft, a motor, a precision encoder, a connection base, a rotary table, a workbench, and a computer system. The precision encoder is employed as a reference and is connected with the precision main shaft coaxially. The precision main shaft is driven by the motor; and an output shaft of the precision main shaft is connected with a detected encoder. The computer controls the rotating speed and the position of the motor as well as simultaneously collects angle measurement data of the precision encoder and the detected encoder; and an error value representing deviation of the position output of the detected encoder from the position output of a reference precision encoder is obtained in rotation angles from 0 degree to 360 degrees of the precision main shaft. And processing is carried out by the computer to provide various measurement errors of the detected encoder and error frequency spectrums. According to the invention, beneficial effects are as follows: there are lots of measurement points and measurement can be carried out continuously, so that various errors of a detected encoder can be reflected; a frequency spectrum analysis on an error source can be carried out; automatic measurement is carried out, the measuring period is short and efficiency is high; and electronization of data processing is realized as well as detection data are filed.

The invention provides a rock core measuring system and method. The system comprises a core holder, an injection pump, a suction pump, a pressure difference sensor and a resistivity measuring unit, wherein the injection pump is connected with a fluid injection port of the core holder and used for displacing a non-wetting phase entering into a to-be-measured rock core fixed in the core holder at a constant speed; the suction pump is connected with a fluid output port of the core holder and used for collecting the original fluid which is in the to-be-measured rock core and is displaced out from the to-be-measured rock core; two ends of the pressure difference transducer are connected with the fluid injection port and the fluid output port respectively, and the pressure difference transducer is used for measuring the pressure difference of fluid at the two ends of the to-be-measured rock core in the displacement process of the to-be-measured rock core; the resistivity measuring unit is connected with the to-be-measured rock core and used for measuring the resistivity of the to-be-measured rock core in the displacement process of the to-be-measured rock core. The system and the method provided by the invention solve the technical problems that when a constant-pressure difference method is adopted for measuring a rock core, the resistivity of the rock core and the information of a pore connected with a throat can not be determined at the same time, and the number of obtained data points is small; meanwhile, the measurement period is shortened compared with that of the constant-pressure difference method.

The invention discloses a wireless sensor network multiple target real-time tracking system based on event drive. The system is designed by using a hierarchy logical structure, wherein a perception layer, a network communication layer and an application layer are respectively comprised. In order to avoid network conflict in a multiple target tracking process, a self-adaption clustering node scheduling strategy based on a task is used. A Calman filter positioning tracking algorithm based on event drive is disclosed. A least square method with fast convergence speed is used to modify a current Calman filter state value, and positioning tracking is carried out on a number of mobile robots in a sensor network. The system uses a double token working mode and is combined with a dynamic time slot allocation method based on a task to effectively complete a network task in real time. The system uses the self-adaption clustering node scheduling method, can automatically carry out clustering on measurement data according to a moving target, breaks a previous working mode which is limited by single target tracking, and realizes a real-time multiple target tracking function and remote feedback control based on a wireless network.

The invention discloses a method for measuring the deformation of a large-sized work-piece, which comprises the following steps of: firstly, placing a fixed point; secondly, sticking a deformation point; thirdly, sampling and shooting a picture; fourthly, rebuilding the information of the deformation point; fifthly, combining the coordinates; sixthly, resetting the ID of the deformation point; and seventhly, calculating the deformation quantity. By the operation steps, the invention can measure the direction and size of the three dimensional deformation of the large-size workpiece, which is caused by the applied force load, thermal load, etc. The method has the characteristics of easy operation, no restriction of the size of the workpiece, abundant measurement information, precise and reliable results, high efficiency and non-contact measurement.

The invention discloses a biochemical oxygen demand BOD soft measurement method based on elastic radical basis function neural network, belonging to the technical field of detection. The sewage processing process has severe production condition and serious random disturbance, has the characteristics of strong nonlinearity, large time varying and serious lag and is hard to build a precise mathematical model by mechanism analysis. The invention utilizes the liveness function of an RBF neuron to judge the activeness of the neuron, and divides the neuron with strong activeness; then, joint strength between the hidden layer neuron and the output layer neuron of an RBF neuron network is analyzed by calculating a mutual information dependency function so as to revise the neural network structureaccording to the mutual information intensity; and finally, the parameter of the neural network is adjusted until the network structure satisfies the requirement on processing information. The invention improves the quality and the efficiency of sewage processing, lowers sewage processing cost and provides in-time water quality and relevant parameter monitoring for realizing closed loop control for the sewage processing process so as to accelerate sewage treatment plants to efficiently and stably operate.

The invention relates to a two dimensional calibrating device of a digital aerial survey camera and a calibrating method thereof; the two dimensional calibrating device consists of an internal azimuth instrument, a computer, the aerial survey camera to be detected and a collimated light tube; the internal azimuth instrument is a two dimensional fine internal azimuth instrument and mainly includes a fixing frame of a detected system, a pitch axis, an azimuth axis and two axle tables; the aerial survey camera to be detected is arranged in the fixing frame of the detected system of the internal azimuth instrument; the collimated light tube is arranged in front of the aerial survey camera to be detected; in the calibrating process, the computer controls the rotation of the pitch axis and the azimuth axis of the internal azimuth instrument by driving a controlling device; collects the data outputted by the coders arranged in the pitch axis and the azimuth axis; carries out image point location collection on the aerial survey camera to be detected through an image collecting card; the computer calibrates the internal orientation elements and aberrances in the aerial survey camera to be detected by utilizing the collected angle values of the pitch and the azimuth coders and the pixel coordinate of the corresponding image point and through a mathematical model. The two dimensional calibrating device of the digital aerial survey camera and the calibrating method thereof of the invention realizes the accurate calibrating of the digital aerial survey camera with large field coverage and large area array; moreover, the calibrating device is simple and has high calibrating precision.

The invention provides a corona-cage-test-based method and system for obtaining audible noises below a high-voltage direct-current power transmission split lead. A split lead erected in a corona cage is used for measuring audible noises; a function relation between audible noise generation power and a lead surface field intensity is obtained; and on the basis of the function relation, audible noises at an observation point below the lead in the practical line are calculated. On the basis of the technology in the prior art, data of a corona cage are converted to the practical line and thus the reference is provided for the ultra-high-voltage direct-current line design. The method comprises: a high-voltage direct-current power transmission split lead is erected in a corona cage; a series of voltages are loaded at the lead; audible noises are measured at the wall or outside of the corona cage; the measured data are calculated to obtain the function relation A0=f(E) between the audible noise generation power and the lead surface field intensity of the testing lead; and the audible noises below the practical line is calculated based on the function relation, obtained by the corona cage, between the audible noise generation power and the lead surface field intensity.

The invention provides a measurement method for acquiring displacement changes of an earthquake simulator. The method comprises steps of building a measurement system, identifying non-coded points and carrying out image acquisition, carrying out spatial coordinate transformation on the non-coded points on the image, carrying out three-dimensional and dynamical matching on the non-coded points on the image, carrying out sequence matching on the non-coded points on the image, tracking the image sequence, carrying out three-dimensional rebuilding, and displaying and outputting data. The invention also provides a measurement system which is used in match with the measurement method. An optical principle is used for acquiring a video image for the non-coded points identified artificially in the structure, the video image is processed based on a digital image processing technology and a related algorithm, automatic recognition and matched tracking on a measurement point position can be realized, three-dimensional rebuilding of the measurement point is thus obtained, the displacement change amount of each measurement point is acquired, and the overall measurement process is contact-free, no damages are caused, the measurement precision is high, the automatic degree is high, the measurement period is short, and the industrial advantages are huge, and the popularization and application prospect is good.

The invention relates to a method for measuring earth and rock by an unmanned aerial vehicle, comprising the following steps: S1 flight task planning and equipment selection; S2 performing flight task to obtain data; S3 establishing a three-dimensional model according to image data and geographic coordinate information; S4 combining engineering drawings and generating The three-dimensional model to calculate the earthwork volume of the survey area; S5 repeats the measurement at a certain time interval to calculate the engineering volume. The present invention can reduce the field workload and shorten the measurement period through the flight control system, satellite positioning system, flight data storage system and airborne camera set on the drone; avoid human intervention in the measurement process and affect the final measurement result, and The comparison and measurement of multiple sets of 3D models obtained by repeated measurement at a certain time interval can calculate the engineering quantity of earth and stone, which is beneficial to control the progress of the project.

The invention belongs to the intelligent vehicle environment perception technology field and especially relates to a calibration device and a method of a multi-line laser radar. The device comprises acalibration plate, a calibration rod, a rotating disk, a spring lock mechanism, an end cap, a bearing, a ball and a pedestal. The calibration plate is clamped on an upper end of the calibration rod.A lower end of the calibration rod is connected to the rotating disk in a threaded connection mode. The rotating disk is clamped in a ring groove of the pedestal and is fixedly arranged with the pedestal through the spring lock mechanism. The bearing is arranged between the pedestal and a bearing hole of the rotating disk and forms interference fit with the rotating disk. The end cap is arranged on the rotating disk and is fixedly arranged at a center shaft of the pedestal through a bolt. A pad is arranged between the bolt and the end cap. The invention discloses the convenient and high-efficient calibration device and the method aiming at a rotation-type 64-line laser radar. Three-dimensional coordinates of scanning points can be simultaneously and accurately calibrated. By using an existing laser radar, an actual position coordinate of each laser scanning point is difficult to be determined, a scanning track shape is discrete and complex and a calibration process is tedious. In the invention, the above problems are solved.

A method for determining the content quantities, solubilities and/or saturation pressures of gases dissolved in a liquid, which is characterized in that in order selectively to determine the individual content quantities of at least two gases dissolved in a liquid sample, more particularly carbon dioxide, nitrogen and/or oxygen, and/or the solubilities or saturation pressures thereof, the volume of at least one measuring chamber filled with the liquid for testing is increased the volume of at least two steps by volume increase factors differing one from another, each having numerical values greater than 1, in that, after each of the volume increase steps, the equilibrium pressure established in the measuring chamber is ascertained, and in that, on the basis of the at least two measured pressure values obtained in this way, the content quantities of the individual gases dissolved in the liquid, and/or the solubility or saturation pressure thereof, are calculated individually. Also disclosed are several variants of a device for implementing the analysis method.

The invention discloses a method for simultaneously measuring measured pieces in different types in a quartz crystal oscillator testing system. According to the method, the problem that general and high-stability crystal oscillator measured pieces cannot be measured simultaneously in the conventional system is mainly solved. The method comprises the following realization steps: firstly, before measurement of the quartz crystal oscillator testing system, inputting information of the measured pieces in different types according to the promotion; secondly, after measurement of the quartz crystal oscillator testing system, measuring the relative average frequency deviation of the measured pieces in different types according to the time interval for one hour; thirdly, measuring the performance of a general crystal oscillator measured piece according to the JJG180-2002 verification regulation, wherein measurement data is effective data; and fourthly, measuring the performance of a high-stability crystal oscillator measured piece according to the JJG181-2005 verification regulation and extracting effective measurement data of measurement data of the high-stability crystal oscillator measured piece to obtain the required useful measurement data. The method disclosed by the invention has the advantages of high measuring efficiency and measuring equipment conservation and can be used for simultaneously measuring the general and high-stability crystal oscillator measured pieces.

The invention discloses a measurement system and a measurement method for a secondary electron emission coefficient of a medium film. The system comprises an electronic gun, a barrel-shaped collection electrode, a sample holder and a general power. A round hole is arranged at the top of the barrel-shaped collection electrode. The sample holder is arranged in the barrel-shaped collection electrode. The electronic gun is arranged outside the barrel-shaped collection electrode. The sample holder, the round hole and the emission end of the electronic gun are in the same straight line. The sample holder is connected with the grounding terminal of the general power through a first resistor. The electronic gun is connected with the negative electrode of the general power. The barrel-shaped collection electrode is connected with a first power supply and a second power supply which have opposite positive and negative electrodes. Change-over switches are connected with the other ends of the first power supply and the second power supply. The change-over switches are connected with the grounding terminal of the general power through a second resistor. In the method, only one electronic gun and one collection electrode are needed, a secondary electron emission coefficient of a sample can be tested, the measuring cycle is shortened, and the efficiency is raised. The measurement system has a simple structure and low cost.

The invention discloses a device for measuring magnetic field gradient tensor. The device comprises a support device for placing the measured object, and a magnetometer array unit used for measuring the magnetic field gradient tensor of the measured object, wherein the magnetometer array unit is arranged parallel to the support device and aligned with a certain plane of the measured object; the support device comprises a three-axis displacement table used for moving the measured object along the three directions of space coordinates to adjust a space position, and a rotary table horizontally arranged on the three-axis displacement table through a suspension arm; the rotary table is used for rotating the measured object support thereon to adjust the opposite surface and the opposite position thereof opposite to a magnetometer array; the magnetometer array comprise a plurality of magnetometers, a magnetometer support, and a support base for supporting the magnetometer support; the magnetometer support is a frame with a plurality of vertical support bars.

The invention belongs to the antenna pattern measurement technology, and relates to the improvement of the antenna amplitude and phase pattern measurement method. Based on a shielded chamber [2], target array [3], three-axis turntable [4], target array calibration system [5], control unit [6], standard signal source [7] and distributor [8] RF simulation laboratory; the steps of measuring antenna amplitude and phase pattern are as follows; determine the electric axis zero position of the measured antenna [1]; calibrate the polarization plane of the measured antenna [1]; measure the measured antenna [1] in the same Amplitude and phase pattern on the polarization plane corresponding to the azimuth plane and the elevation plane of the three-axis turntable [4]. The invention has short measuring cycle, high measuring efficiency and high measuring precision. It can efficiently and accurately measure the amplitude and phase characteristics of the antenna, and guide the development and improvement of the antenna in a timely and rapid manner.

The invention relates to a method for quickly measuring magnetic characteristics of magnetic materials. The method includes providing a to-be-measured magnetic core with closed magnetic circuits, respectively winding excitation windings and detection windings on the to-be-measured magnetic core and serially connecting the excitation windings, capacitors and resistors with one another to form a closed circuit; electrifying the excitation windings with direct currents, applying direct-current voltages on the capacitors, enabling the to-be-measured magnetic core with the closed magnetic circuits, the capacitors and the resistors to meet damped oscillation circuit conditions and measuring current change procedures of the excitation windings and voltage change procedures of the detection windings to obtain direct-current magnetic flux density corresponding to direct-current magnetic field intensity of the magnetic core under direct-current conditions, a cluster of alternating-current magnetic hysteresis loops under different magnetic flux density conditions and magnetic core loss under the different magnetic flux density conditions. The method for quickly measuring the magnetic characteristics of the magnetic materials has the advantages of short measurement periods and easiness in acquiring magnetic characteristic curves during deep saturation.

The invention relates to a wide-range magnetic field viscometer for a high-temperature melt, and a method for measuring viscosity by using the same. The viscometer comprises a measuring barrel and a stepping motor disposed above the measuring barrel, wherein the stepping motor is connected with a ceramic hanging thread through a rotating shaft; the lower end of the ceramic hanging thread is connected with a sample-holding apparatus in the measuring barrel; the rotating shaft is provided with an optical measuring system for measuring a rotational attenuation rate of the rotating shaft; a heater for increasing the temperature of the sample is disposed in the measuring barrel; the outer of the measuring barrel is sleeved with a horizontal ring-shaped magnetic field apparatus to make the position of the heater disposed in the magnetic field; the lower portion of the horizontal ring-shaped magnetic field apparatus is fixed on a lifting system to regulate the position of the magnetic field; and the measuring barrel is provided with a cooling system and an evacuating device. The viscometer can accurately measure viscosity values of various liquid materials in a temperature range of -30 DEG C-1700 DEG C under different magnetic fields, greatly increases the measured viscosity range to 0.1 cp-100 cp (mPa.s), is short in measuring period, and has high precision.

The invention provides a method for measuring a uranium isotope ratio in single particles. The method comprises the following steps: S1, preparing a uranium-containing particle sample; S2, searching and identifying uranium-containing particles in the uranium-containing particle sample by utilizing a scanning electron microscope and an X-ray energy dispersive spectrometer; S3, after finding out the uranium-containing particles, transferring the uranium-containing particles onto a sample belt by utilizing a microoperation system; S4, carrying out isotope analysis on the sample belt by utilizing a thermal ionisation mass spectrometer and obtaining the uranium isotope ratio in the uranium-containing particles. Compared with the prior art, the method for measuring the uranium isotope ratio in the single particles, provided by the invention, does not need to carry out irradiation, cooling and etching, can greatly shorten the measurement period of particle analysis and improves analysis efficiency.

The invention discloses a spatial geometric error measurement and identification method for multi-line machine tools based on a laser interferometer. The method includes steps of (1), planning a measurement space and a measurement path in a machine travel space; (2), measuring a positioning error of the X-axis, two non-rolling angle errors, and two straightness errors; (3), measuring a positioningerror of the Y-axis, the two non-rolling angle errors, and a Z-direction straightness error; (4), measuring a positioning error of the Z-axis and the two non-rolling angle errors; and (5), identifying the straightness error when the measurement conditions are met, measuring the positioning error on the face diagonal and the body diagonal, and identifying by combing a spatial comprehensive error model to obtain the error of the roll angle and three straightness errors including verticality errors; and if no straightness errors are identified before, identifying by combining with a straightnesserror formula to obtain three errors of the roll angle and six straightness errors. According to the method, identification requirements of the spatial geometric errors are met, and the measurement efficiency and measurement accuracy are high.

The invention discloses a dynamic data measurement method and device based on a vibrating wire sensor, and belongs to the technical field of the health monitoring of a large-scale structural body. Themethod comprises the following steps: enabling the vibrating wire sensor to be fixed on a measurement point of a to-be-measured structural body; carrying out the excitation through a phase compensation adaptive frequency excitation method, and enabling a string wire to be stably resonant at an inherent frequency; collecting an electromotive force signal generated during the vibration of the steelwire and the temperature; carrying out the processing of a resonant signal through employing a windowing FFT algorithm based on amplitude ratio interpolation, and estimating the frequency of the signal component with the maximum amplitude in the collected signal as the real-time resonant frequency of the steel wire; carrying out the temperature compensation according to the real-time resonant frequency of the steel wire and the obtained current temperature of the steel wire, obtaining a real-time strain Epsilon of the steel wire, and obtaining the real-time strain Epsilon(s) of the to-be-measured structural body. The invention also discloses a dynamic data measurement device based on the vibrating wire sensor, and the device can implement the above method. The method and device are shortin measurement period, and are high in precision.

The invention provides a method and a system for measuring high-temperature corrosion characteristics of a boiler. The method comprises the following steps: establishing a calculation model for simulating combustion conditions of the boiler; selecting a calculation domain according to structural characteristics of the boiler, performing mesh generation on the calculation domain to obtain a mesh model of the boiler, and setting initial boundary conditions of the mesh model; simulating the combustion process of the boiler under each working condition according to the calculation module and the mesh model of which the initial boundary conditions are set; measuring the speed and temperature distribution information of each combustor in the boiler and distribution information of O2 and CO which correspond to each combustor under various working conditions in the simulated combustion process, and thus obtaining parameters which reflect the corrosion characteristics of the boiler under various loads. According to the scheme, the measurement difficulty can be reduced, the measurement cost is reduced, the measurement period is shortened, and guidance is provided for boiler transformation.

The present invention discloses a method for testing noises of a hybrid power automobile. The method includes the steps as follows: a) selecting an automobile of a series-parallel type hybrid power automobile system as an object to be tested; b) measuring vibration accelerations: measuring vibration accelerations of an engine, a transmission, and a primary driver seat and a secondary driver seat through a 24-channel magnetic head recorder; c) measuring noise signals: measuring noise signals of a front left wheel, the outside of an automobile top of the primary driver seat, the outside of an exhausting port, the transmission and the engine; d) measuring revolving speeds of a generator and a motor by employing a Prius fault diagnosis apparatus; e) recording noise signals of positions corresponding to double ears of a primary driver, a position corresponding to a right ear of the secondary driver, and a position corresponding to a right ear of a passenger behind the primary driver; f) and performing a noise spectral analysis inside the automobile according to measurement data acquired from steps b) - e). The method can accurately confirm a noise excitation source and shorten a measurement period.

The present invention relates to a radiation-absorbing heat exchange sheet material on the absolute bolometer for measuring the solar radiation, especially to a diamond composite film used on the absolute bolometer and the preparing method thereof. The diamond composite film used on the absolute bolometer in the invention is prepared by compounding the pure diamond piece layer which is taken as the heat sink material and the black boron-doping diamond film that is taken as the light radiation absorbing material. The preparing method is firstly preparing the heat sink diamond piece with a one-time chemical vapor deposition, and then depositing the carbon nano-tube film layer on the diamond piece with a floating catalytic method. The diamond composite film of the invention has the advantages of strong heat and impact resistance, higher absorbing rate to the radiation and the rate is up to 99%, and stability for a long period; and the surface adhesions of the heat sink material and radiation-absorbing material are excellent. Thereby the measuring precision and sensitiveness of the bolometer can be increased and the measuring period can be shortened, and the adaptability of the absolute bolometer in the working condition of satellite is increased.

The invention relates to a device for testing kinetic energy of a spraying water drop. The device comprises a sensor water receiving module, a signal conditioning module, a data collection module, a computer and a data analysis module, wherein the data analysis module is arranged inside the computer, the sensor water receiving module comprises a substrate, an array sensor which is composed of a plurality of piezoelectric membranes is arranged on the substrate, the sensor water receiving module us arranged below spraying water, a sensor outputs a sensed electric charge quantity Q through a forward electrode output end of the sensor after the sensor senses the water drop, a reverse electrode output end of the sensor is grounded, the signal conditioning module comprises an impedance conversion unit and an amplification unit, the impedance conversion unit is used for converting the electric charge quantity Q sensed by the sensor into a voltage quantity U<0> for output, the amplification unit is used for amplifying the voltage quantity U<0> output by the impedance conversion unit and outputting a voltage quantity U<out>, and the data collection module obtains the voltage signal U<out> output by the amplification unit in real time and inputs the voltage signal U<out> into the computer after analog-to-digital (A/D) conversion. The device is widely applicable to kinetic energy tests of spraying water drops in little sprinkling irrigation projects.