499 results about "Measurement problem" patented technology

Pre-defined descriptor or measurement questions or items are presented to a user or operator using a computer with a storage and a display for use in systematic observation and assessment. Measurement items that are used in the course of observation and assessment are automatically correlated with address data that is associated with a track of simultaneous digital recording so as to automatically generate meaningful indexes for the recorded material. Based upon the contents of the measurement questions or items, including any qualitative or quantitative descriptions or numerical rating results from use of the descriptors or measurement items, the indexes can readily be further processed, providing the capacity for improvements in efficiency, consistency, and accuracy in retrieving and utilizing the recorded material. The method is particularly useful for processes relating to systematic interview or assessment methods, including the training and monitoring of interviewers or assessors and the storage, retrieval, analysis, and other manipulation of recordings.

A management system for improving operation of a plant. A server is coupled to the management system for communicating with the plant via a communication network. A computer system has a web-based platform for receiving and sending plant data related to the operation of the plant over the network. A display device interactively displays the plant data. An optimization unit is configured for optimizing at least a portion of a refining or petrochemical process of the plant by acquiring the plant data from the plant on a recurring basis, analyzing the plant data for completeness, correcting the plant data for an error. The optimization unit corrects the plant data for a measurement issue and an overall mass balance closure, and generates a set of reconciled plant data based on the corrected plant data.

The invention discloses a monocular-camera-based method for measuring depth. In the method, the depth information of a static object is measured rotationally by utilizing a cloud deck. The method comprises the following steps of: collecting an image under the condition of the given azimuth of a camera and the given focal length of a lens; controlling the camera to rotate an angle horizontally or vertically by the cloud deck, and collecting an image again; finding matched image points in the two images by an image matching algorithm; and calculating the depth of object points corresponding to the image points. The invention also discloses a monocular-camera-based method for measuring a depth field, and a system device for measuring in a monocular-camera-based method for measuring the depth and sizes of motion targets. The method is suitable for a large number of ordinary video monitoring cameras with rotary cloud decks which are installed at present, so that the measurement of the depth and actual sizes of objects is realized, and the measurement problem of video monitoring is solved effectively.

In certain embodiments, the invention relates to optical probes and methods for conducting Raman spectroscopy of a material at multiple excitation wavelengths. The probes and methods utilize optical elements to focus outputs from a plurality of light sources or lasers onto a sample, collect backscattered light from the sample, separate Raman spectra from the backscattered light, and provide at least one output containing the spectra. By utilizing multiple excitation wavelengths, the probes and methods avoid Raman measurement issues that may occur due to, for example, fluorescence and/or luminescence.

A method and apparatus that solve the problem of accurate measurement of gas flow so that the delivery of gases in semiconductor processing may be performed with greater confidence and accuracy by performing real-time characterization of a lead-line for mass flow controller (MFC) flow verification are provided. In one embodiment a mass flow verifier (MFV) provides rate of rise information to a controller via a digital interface without correcting for lead-line influences. After receiving the rate of rise data from the tool host computer computes a gas mass correction factor in real-time based on at least one of the following: MFC temperature sensor data, lead-line temperature sensor data, lead-line pressure transducer data, and lead-line volume. The rate of rise data and gas mass correction factor are used to compute accurate mass flow. The accurate mass flow information may be used to calibrate the MFC.

The invention discloses a method for measuring the phase center of an antenna, which is based on moving reference points. The method provided by the invention mainly solves the measuring problems of manual operation and artificial judgment. The method includes the following steps: in the measuring system, a measured antenna is adjusted to face an original antenna and is taken as the zero point of a measuring angle; the horizontal direction and the vertical direction of a two-dimensional translation device are controlled to reset and taken as the datum reference point of the phase center test; related parameter information is input and all moving shafts are controlled automatically, thereby collecting the amplitude and phase data of the measured antenna; the horizontal deviation and the longitudinal deviation of the phase center can be worked out by using the least square method and then can be determined whether the deviation of the phase center meets the deviation requirements of the designed phase center of the antenna; if not, the reference point of the antenna can be changed by automatically adjusting the horizontal coordinate and the vertical coordinate of the two-dimensional translation device according to the deviation value; the test can be repeated again and again until the horizontal deviation and the longitudinal deviation meet the requirements; and the final changed reference point can be taken as the phase center of the measured antenna. The method provided by the invention can automatically and accurately measure the phase center of an antenna.

The invention relates to a system and a method for automatically measuring dimension and weight of a road vehicle, in particular to an integrated system and an integrated method for rapidly and dynamically measuring the length, width, height and weight of a vehicle, and aims at effectively solving the problems in overloading detection work at present. According to the system, the dimension information of the vehicle is measured in a front and back portal frames manner; the width and height information of the vehicle in a single lane is measured by combination of two two-dimensional laser radars on the front portal frame, so that the measurement problem caused by vehicle deformation can be effectively avoided; and the length information of the vehicle in the single lane is indirectly measured by virtue of a single laser radar on the rear portal frame; and starting and stopping information of the single vehicle is provided for a shaft-type weighing scale by virtue of a laser radar separation vehicle on the front portal frame. The system has the advantages of high measurement speed and high accuracy, and normal running of the vehicle is not affected.

The invention relates to the field of automatic abstracting, and discloses a graph model-based automatic abstracting method. According to the technical scheme, an LDA probability topic model is applied to measurement of semantic correlation between sentences and improvement of the measurement effect of sentence correlation; and an idea of topic correlation and position sensitivity of the sentences is provided, so that abstract generation is relatively reasonable and effective. The method comprises the following steps: firstly, obtaining topic probability distribution of a document and word probability distribution of the topic through training the LDA topic model, determining the topic probability distribution of the sentences and effectively converting a semantic similarity measurement between the sentences into a similarity measurement problem of the topic probability distribution of the sentences; with the sentences as nodes, building edges by referring tothe cosine similarity and according to the semantic similarity between the sentences and generating a text graph representing the document; calculating the topic correlation between the sentences according to the topic probability distribution of the sentences and the topic probability distribution of the document; and calculating the position sensitivity and the like of the sentences according to the positions of the sentences in the document.

The invention provides a high-efficiency and high-precision detection device for circular arc roundness of a cutter point of a diamond cutter and belongs to the technical field of cutter detection devices. A precision air flotation shafting is vertically arranged at the center of a vibration isolation platform; a fine-aligning device is fixedly arranged at the upper end part of the precision air flotation shafting; a cutter fixture is fixedly arranged at the upper part of the fine-aligning device; a stereoscopic microscope system is arranged above the cutter fixture; and an atomic force microscope (AFM) system is arranged above one side of the cutter fixture. According to the high-efficiency and high-precision detection device disclosed by the invention, the stereoscopic microscope system assists the fine-aligning device in aligning, so that the aligning precision is increased, the defect that the measurement range of the AFM is narrow is overcome, and three-dimensional measurement with high measurement precision is realized; the problem of precision measurement of the circular arc roundness of the cutter point of the diamond cutter with a circular arc edge can be solved; and measurement data of the circular arc roundness can be used for reflecting dynamic characteristic of a cutter grinding machine, evaluating the cutter grinding quality of the cutter and providing data support for cutter compensation in the numeric control single-point diamond turning.

The invention relates to a pulse electronic accelerator nano-pico ampere electron beam flow measuring system, relating to an electronic accelerator pulse electron beam flow measuring system, in particular to the nano-pico (10-10A/cm2) micro beam flow measurement of millisecond pulse, belonging to the electron radiation environment ground simulation and test field. The pulse electronic accelerator nano-pico ampere electron beam flow measuring system is composed of a novel inclined-bottom faraday cup, three coaxial cables and a nano-pico level current amplifier. The measurement result can be obtained by oscilloscope or data acquisition card. The inclined-bottom faraday cup electron collection system resolves the collection efficiency problem of high energy electrons (MeV), to improve collection efficiency. The adopted three coaxial cables can reduce the interference of electromagnetic field. The nano-pico ampere level current amplifier resolves the stable current linear amplification problem under electron radiation, and converts weak current signals to voltage signals, thus being convenient for data acquisition of oscilloscope or data acquisition card. The invention resolves the measurement problem of nano-pico ampere pulse electron beam flow, to confirm the accuracy, real-time property and easy use of measurement.

The invention discloses a capacitive equipment medium loss online monitoring method based on an IEC61850-9-2 sampling standard in an intelligent substation. According to the invention, medium loss measurement based on the IEC61850-9-2 sampling standard in the intelligent substation can be realized. Through fiber B code timing, synchronization acquisition of a reference voltage and a leakage current can be realized. Through a high-precision zero-flux mutual inductor and a 16 bit AD, the acquisition of the leakage current can be realized. Through a resampling algorithm and a software frequency tracking algorithm, rejection of an interference signal and full period sampling can be realized. And high-precision online monitoring of the capacitive equipment medium loss can be realized. By using the method of the invention, a medium loss measurement problem based on the digital sampling in the intelligent substation can be solved.

The invention provides a method and a device for measuring enhanced Reference Signal Received Power (eRSRP) of Channel State Information-Reference Signals (CSI-RSs) of transport points in Coordinated Multi-Point (CoMP), and a method and a device for maintaining a measurement set/cooperating set based on the measurement. A method for reporting eRSRP is provided, including: receiving CSI-RSs transmitted by multiple transport points; measuring and evaluating eRSRP of the CSI-RSs of the multiple transport points based on measurement configuration; and transmitting a measurement report about the eRSRP of the measured CSI-RS. The measurement problem of the enhanced reference signal power of the transport points in CoMP and the maintenance problem of the measurement set/cooperating set are solved, thereby greatly promoting the development and application of the CoMP technology.

The invention discloses a device for measuring gas phase and liquid phase flow velocity in miniature tube based on capacitor and cross correlation method and a method thereof. The device comprises an insulating mini-measuring tube, two capacitive sensors, a capacitance-voltage switching circuit, a data acquisition circuit and a computer. The method comprises obtaining two sets of capacitance signals reflecting gas-liquid two phase flow distribution information by the two capacitive sensors, performing capacitance-voltage switching, transmitting to the computer via the data acquisition circuit, calculating the cross correlation function of two sets of capacitance measurement signals with the principle of cross-correlation velocity measurement, determining the transition time of the signals according to the peak position of the cross correlation function, and further obtaining the flow velocity information of the gas phase and liquid phase in the miniature tube. The invention provides an effective way to solve the problem of flow velocity measurement of non-conducting gas phase and liquid phase in the miniature tube, and the device has the advantages of simple structure, low cost with no influence on the flowing of gas phase and liquid phase in the tube by non-invasion manner. The invention is suitable for continuous online flow velocity measurement of non-conducting gas phase and liquid phase in the millimeter-scale miniature tube.

The invention provides a device and method for measuring a friction coefficient under a high temperature environment. Before the experiment, a material to be measured is firstly manufactured into a test piece I and a test piece II, the test piece I is fixed at one end of a transmission shaft, the test piece II is fixed at the upper end of a knockout pin, the test piece I and the test piece II are mutually extruded and are both put in a high temperature box; during the experiment, a power supply of the high temperature box is switched on, the temperature in the box rises gradually, the test piece I rotates at a constant speed under the driving of the transmission shaft; the transmission shaft is connected with a torque sensor and a speed regulating electric motor via a shaft coupler; the torque which is applied to the test piece I by the transmission shaft is read by the torque sensor, and in accordance with torque balance, the frictional force applied to the test piece I by the test piece II can be measured; and a jack and a pressure sensor are sequentially arranged at the lower end of the knockout pin, the positive pressure of the test piece II to the test piece I can be calculated according to the reading of the pressure sensor, so the friction coefficient mu can be calculated in accordance with the formula of frictional force mu=f/N. Through the method provided by the invention, the problem of measuring the friction coefficient under a high temperature environment is solved.

A three-dimensional contour measuring method based on structured light field imaging is characterized by including the steps that an imaging system composed of a light field camera and a projector isestablished, the projector projects an original coding grating to a to-be-measured object, the light field camera shoots a coding grating image obtained after being subjected to contour modulation ofthe to-be-measured object, and the coding grating image which is shot by the light field camera and is subjected to contour modulation of the to-be-measured object is decoded, and three-dimensional reconstruction is carried out on the contour of the object according to the information obtained after decoding; a three-dimensional contour measurement problem is summarized into three equations for solving three unknown numbers containing object point three-dimensional coordinates, wherein after the imaging system is calibrated, two equations are determined by using the process that the to-be-measured object is imaged in a center sub-aperture image in the light field camera, the third equation is determined by using the decoded image information, and three-dimensional contour measurement is achieved by solving an equation set formed by the three equations.

The invention discloses a method of measuring end-to-end delay of mobile phone?video?communication application. Firstly, a section of visual coding timestamp sequence?video is generated and displayed on an LCD display; secondly, a sender mobile phone and a receiver mobile phone build video connection via video?communication application, the visual coding timestamp sequence?video shot by the sender is sent to the receiver, and the receivers displays the conversation content with the visual coding timestamp sequence?video included on a screen; thirdly, a high-definition camera is used for shooting the LCD display and the receiver screen at the same time; and finally, the acquired video data with the visual coding timestamps included is sent to a delay analysis system, the timestamp on each frame is recognized, time difference among the timestamps is calculated, and the end-to-end delay is obtained. According to the method disclosed by the invention, from?the?perspective?of?the?computer vision, the delay measurement problem is converted into the timestamp reorganization problem, the operation process is simple, the difficult problem of synchronization of different clocks is avoided, and accuracy of delay detection is improved.

The invention discloses a measurer of capacity coupling type contactless conductivity, based on serial resonance and a method. The measurer comprises a signal generator, an inductor module, an insulated measurement tube, an exciting electrode, a detection electrode, a rectifying filtering circuit, a data acquisition module and a computer, wherein the output of the signal generator excites the exciting electrode via the inductor module, the detection electrode obtains the solution conductivity measurement information in the insulated measurement tube, the rectifying filtering circuit and the data acquisition module convert the information into voltage signals to be transmitted to the computer, and the computer utilizes the one-to-one relationship between voltage and conductivity to obtain the conductivity measurement value of the object liquid. The invention utilizes serial resonance method to effectively eliminate the effect of coupling capacitance and parasitic capacitance on the conductivity measurement and expands the conductivity measurement range. The relative measurer has the advantages of wide measurement range, high sensitivity, simple structure, contactless property and low cost, which provides an effective path for measuring the liquid conductivity in tube.

The invention discloses a long-distance moving object height measurement apparatus and method based on machine vision. The apparatus is mainly composed of a binocular vision synchronous acquisition system, an image data processing system, a wireless data transmission unit and a remote monitoring terminal. The image acquisition system of the apparatus can realize synchronous image acquisition by a binocular camera and provides accurate data for subsequent processing; the image processing system employs an FPGA and DSP structure, performs preprocessing on the data through an FPGA and then performs subsequent processing on the data through a DSP chip so as to reduce the DSP computation data amount and improves the real-time performance of the apparatus; in an image feature matching phase, a Harris angular point detector is employed for realizing feature extraction at a sub-pixel level so that the computation precision is improved; and in a height measuring phase, a BP neural network is taken as an error correction link so that the measurement precision is improved. The long-distance moving object height measurement apparatus and method based on the machine vision effectively solve the problem of height measurement of a moving object at a long distance.

The invention discloses a capacitor coupling noncontact conductance measurement device and method. The device comprises an alternating-current excitation source, an insulated measurement pipeline, an excitation electrode, a detection electrode, a range resistor, a virtual inductor, a differential amplifier module and a signal processing module, wherein one end of the virtual inductor is connected with the range resistor, while the other end is grounded, meanwhile, two ends of the range resistor are connected with the differential amplifier module. The virtual inductor substitutes an actual inductor, thus effectively overcoming the adverse effect of a coupled capacitor on the measurement result according to the series resonance principle. The virtual inductor is a grounding inductor, and compared with a floating inductor, the virtual inductor is good in working stability and simple in circuit structure; compared with an actual inductor, the virtual inductor capable of adjusting the equivalent inductance value reduces the requirement for the frequency of the excitation source. In addition, different from a noncontact conductance measurement method adopting a current method, the capacitor coupling noncontact conductance measurement method adopts a voltage method to obtain the equivalent conductance value of measured conductive fluid, thus providing helpful reference for solving the conductance measurement problem of conductive fluid in a pipeline.

The invention discloses an optical measuring device with high reflectivity and high transmissivity, belonging to the field of optical measuring tests. The device comprises an optical source assembly, a laser power stabilizing unit, a monitoring system with a wedge-shaped beam splitter and a trap detector, a detection system with an integrating sphere detector, and a computer with a measuring software package. Laser output by the optical source assembly forms a stable beam with instability less than 0.01% after passing through the laser power stabilizing unit. The beam is divided into two beams by the wedge-shaped beam splitter, wherein one beam is received by the trap detector, and the other beam is received by the integrating sphere detector after passing through a tested sample. The outputs of the trap detector and the integrating sphere detector are sent to the computer. The computer correspondingly processes a received signal and finally gives the measurement results of the reflectivity and the transmissivity of the tested sample. The invention solves the accurate measurement problem of high reflectivity and high transmissivity of an optical element, and the measurement range is 99.5-99.99%. The invention has the characteristics of high measurement accuracy, good repeatability and broad application prospect.

The invention discloses a mechanical sealing end surface deformation measurement system based on binocular vision DIC and a measurement method thereof. The system comprises a mechanical sealing test device, high-speed digital cameras, lenses, acquisition cards, a light source, a calibration plate, a support system, and a server for digital image acquisition and correlation analysis and processing. The measurement method altogether comprises eight steps. A speckle image on the surface of a mechanical sealing static ring in an operation condition can be acquired, the image can be analyzed and processed by directly using the binocular vision digital image correlation method, and thus, a three-dimensional shape on the surface of the mechanical sealing static ring, and a three-dimensional deformation field under effects of force and thermal load can be acquired. According to the method, the use is convenient, the measurement precision is high, the full-filed measurement problem of surface deformation under effects of force and thermal load of mechanical sealing can be effectively solve4d, and foundation is laid for making a research on key factors influencing mechanical sealing deformation and exploring measures for reducing deformation.

The invention relates to a technique for measuring an initial attitude of a high-speed rotating projectile body at a muzzle, in particular to a method for measuring the initial attitude of the high-speed rotating projectile body at the muzzle based on a three-axis micro electro mechanical system (MEMS) accelerator and two nonorthogonal distributed MEMS gyroscopes to solve the problem of accurately measuring the high-speed rotating projectile body with high axial overload and high angular speed. The method for measuring the initial attitude of the high-speed rotating projectile body at the muzzle comprises the following steps: (I) establishing a cannon emission coordinate system as a reference coordinate system, setting an emission point of the projectile body in a barrel as an original point of the reference coordinate system, and arranging the barrel in an XnOYn plane of the reference coordinate system; establishing a projectile body coordinate system, setting a projectile body core as an original point of the projectile body coordinate system, and enabling an axis to be along the axial direction of the projectile body; and in the whole process of emitting the projectile body to the muzzle, ensuring that the yaw angle of the projectile body is zero and the pitch angle is not changed. The design is reasonable, and the measurement problem that the range and the accuracy are conflicted when the axis angular rate of the projectile body is measured is solved through the two high-precision small-range gyroscopes.

The invention relates to a positioning measurement method based on key point detection of a marker, which comprises the following four parts of: 1. design of a ruler and a marker: realizing the ruler and the marker with high environmental adaptation and convenient use and manufacture; 2. detection of the ruler for calibrating: performing multi-threshold segmentation on a compressed image according to a custom segmentation function and positioning the ruler by methods of contour detection, polygon fit, and the like; 3. detection of a key point of the marker: detecting a positioning key point mainly by adopting methods of histogram matching, gray scale projection, Hough transformation segment detection, least square method straight line fit, and the like; and 4. reestablishment of three-dimensional world coordinates: adopting a two-dimensional method of photography measurement. The methods of multi-threshold segmentation, Hough transformation and least square method combination for positioning a straight line, and the like improve the performance and the precision of an algorithm. The invention has wide application range and is suitable for solving various positioning measurement problems based on key point detection.

The invention discloses a method for measuring a gas and water production dynamic relative permeability curve in undersaturation coal reservoir development. The method comprises the steps that gas well accumulation production Q is obtained; a production phase of a production well is judged; reservoir pressure p and reservoir water saturation Sw are obtained; the reservoir pressure p is introduced into an improved absolute permeability model, and the absolute permeability K is obtained; irreducible water saturation Swr is predicted by measuring the porosity phi; the reservoir water saturation Sw and the irreducible water saturation Swr are introduced into a relative permeability model, and the relative permeability kr is obtained; the relative permeability and the absolute permeability are coupled on the condition of the identical the reservoir pressure p and the identical reservoir water saturation Sw, and the effective permeability ke at the moment is obtained. The method solves the problem of measuring the undersaturation coal reservoir gas and water relative permeability curve, the positive and negative effects and the slippage effect in the developing process are taken into consideration, the changes of a two-phase common flow area relative permeability curve can be represented, the changes of a single-phase water stage relative permeability curve can be better represented, the influence of water invasion is taken into consideration, and the actual production of undersaturation coal gas reservoirs are better met; a nuclear magnetic resonance method is used, convenience, fastness and non-destruction are achieved, precision is higher, and practicability is higher.

The invention discloses an electronic throttle valve adaptive backstepping control method based on a Romberg sliding-mode observer, and relates to the technical field of automobile electronic control. Firstly, in order to solve the problem that the change of the opening degree of an electronic throttle valve can not be measured, the change is estimated through the Romberg sliding-mode observer and based on the electronic throttle valve state equation; secondly, approaching is conducted on the nonlinear unknown quantity-gear clearance torque through the approaching characteristic of an RBF neural network; finally, a control law, an RBF network weight renewing law and an interference adaptive law are designed based on the Lyapunov stability theory and through combination with the nonlinear backstepping control method. By means of the method, the problem that nonlinear factors and some parameters easily change over time during electronic throttle valve control can be well solved, and the control effect and dynamic response performance are further improved.

The invention discloses an analysis method of crash sequence images of real vehicle components and an analysis system thereof are used in 3D motion analysis after real-time crash tests of the real vehicle components. The analysis method comprises the following steps: performing image motion reproduction on the crash sequence images to get dynamic deformation data and residual deformation data of a detection target in the images; tracking target identifications in the crash sequence images, getting and outputting the data of speed and acceleration of the target by analyzing the motion parameters of the target. The analysis method can help objectively and really get test data, get related kinematics parameters by a functional relation between coordinates and time of the target, and solve the measurement problems of parameters such as deformation, displacement, velocity, acceleration and the like in high-speed crash course.