855 results about "Measurement cost" patented technology

The invention relates to a human body measurement method, in particular to the non-contact human body measurement method for clothing design which belongs to the technical field of clothing design. The digital images of the front surface and the side surface of the human body are firstly obtained; the extraction of the image edges are carried out by adopting the color segmentation, the best threshold segmentation, the hole filling, the opening operation and the pixel communication image processing method, thereby obtaining the image edges of the front surface and the side surface of the human body; the human body measurement feature points and the lines are determined, the corresponding height and width measurement data of the human body for the clothing design are obtained by calculation; a mathematical model is established by applying the width and the thickness data of the human body to obtain the related circumference data, and the human body circumference measurement data for the clothing design is obtained by BP neural network simulation and regression prediction treatment. The method has simple device, convenient operation and low measurement cost, thereby being capable of meeting the requirements on the design and the production of the clothing industry and having broad popularization and application prospects.

The invention discloses a method and a device for measuring surface topographies of mirror and mirror-like objects. Phase measurement deflectometry is adopted to measure mirror and mirror-like surface shapes, a combination between a liquid crystal display and a planar mirror serves as a calibration plate, the liquid crystal display is fixed and can not move, the planar mirror moves freely for four times, an image reflected by the planar mirror is photographed by a CCD detector, linear solution and beam method adjustment are then used for completing calibration on inner parameters of the camera, global pose estimation is used for completing calibration on the relative relation between the liquid crystal display and the camera, and finally, a three-dimensional topography of a to-be-detected mirror surface is calculated and obtained through a gradient integral of the phase measurement deflectometry. According to the device and the method of the invention, defects that the calibration plate is needed and a precise positioning control point is attached to the planer mirror during the calibration process in the traditional method are overcome, the measurement cost is low, and he measurement speed is quick; and constraint conditions such as rotation matrix orthogonality during a perspective imaging process and a fourier transform method are introduced for corresponding point matching, and influences by high noise and multiframe processing on three-dimensional topography recovery can be overcome.

The invention discloses a jump detector for a grinding wheel circle. A rotary fixture is rotatably arranged on a workbench. The rotary fixture comprises a spindle, wherein the spindle is provided with a central spindle part used for being coaxially spliced and matched with a central hole of a grinding wheel to be detected. A gland and a tray, which are used for clamping and fixing a grinding wheel to be detected, are correspondingly fixed above and below the central spindle part on the spindle. On the workbench, the outer side of the circumference of the grinding wheel to be detected is provided with a detector for detecting the jump of the end face circle and the jump of the radial circle of the grinding wheel to be detected. The detector comprises a sensor installing rack fixedly arranged on the workbench, wherein the sensor installing rack is provided with a first displacement sensor used for detecting the jump of the end face circle of the grinding wheel to be detected and a second displacement sensor used for detecting the jump of the radial circle of the grinding wheel to be detected. By adopting the jump detector, personal errors brought by manual measurement are avoided, the measurement efficiency is efficiently increased, and the measurement cost is reduced.

The invention relates to a measurement method of smoke concentration, temperature and particle concentration distributions and a device thereof, in particular to a measurement method by using multi-source tomography technology while reconstructing smoke concentration, particle concentration and temperature distributions and a device. The method comprises the following steps of: transmitting a laser signal to an optical fiber collimator; making reciprocating swing movement as soon as the optical fiber collimator emits a light beam; reflecting the light beam by a film-plated columnar reflector to a photodetector after passing through a flue outlet; transmitting the measurement signal to a computer by the photodetector to obtain the projection data of a fault plane at different angles; reconstructing gas concentration and temperature by using the projection data; and reconstructing particle concentration by using the projection data. In the invention, a tunable laser respectively scans a particle and a smoke influencing regions, so that the measurements of the smoke and the particle are independent from each other; the fault plane distributions of smoke, particle concentration and temperature can be reconstructed at the same time to achieve 3-dimensional reconstruction; the measurement of fault plane parameters has short time and dynamic change; and the measurement cost is very low.

The invention relates to a method for measuring high frequency micro vibration of triaxial angular displacement of satellite payload. The method comprises the steps of measuring linear acceleration and utilizing the amplification effect generated by twice integration of a high frequency signal, thus realizing high accuracy measurement at low cost. Analysis shows that an acceleration meter with the accuracy of 10-4g can be adopted for 50Hz angular displacement with the amplitude of 10-6 degrees under the condition of a 1m reference line, thus greatly reducing the accuracy of an instrument and reducing the measurement cost. The invention provides a method for measuring the vibration quantity under two conditions of full time and time window.

The present invention relates to safety monitoring system, and is flexibility monitoring method for large span bridge structure. Whole bridge pressure field is first established with water tanks set in the unchanged location, water pipes set horizontally and city water supply system to lead water pressure to deformation location of the bridge; and the pressure transducer is fixed to the measured part. The pressure change is converted into flexibility change and monitored with the computerized monitoring system, which consists of water tank, water pipes, pressure transducer, A/D converter, computer, etc. The present invention has high measurement stability, great measurement range, low measurement cost and high practical value.

The invention relates to a system for measuring half-wave voltage of a phase modulator and a measurement method. The measurement system comprises a laser generator, a polarization controller, a microwave signal generator, an optical interferometer, a power meter and a processor. The method comprises the following steps of: connecting a phase modulator to be measured into a detection system; determining working parameters of the system, and adjusting working conditions of the system; measuring optical power values under the condition of modulating microwave signals with different amplitudes, and comprehensively processing data; and measuring the half-wave voltage at different frequencies. By the system and the method, all the parameters measured at the same detection frequency are comprehensively processed by the characteristic of high resolution of modulation signals generated by the microwave signal generator to obtain a half-wave voltage value at the frequency, and the half-wave voltage value is circularly processed to obtain half-wave voltage values at various detection frequencies; and therefore, the system and the method have the characteristics that the system and the method are high in resolution of measurement frequency, the phase modulator has a plurality of measurement frequency points and a plurality of half-wave voltage measurement values and is high in accuracy, the using performance of a high-speed phase modulator can be exerted, the system and the method are systematical in measurement and low in measurement cost, and the like.

The invention discloses equipment and a method for detecting the burst tendency of glass of a curtain wall. A strain material is used for detecting the distortion degree of the glass, a strain gauge pressure sensor is closely contacted with the surface of the glass to be measured by a negative pressure absorption device, the deformation of a strain gauge is completely consistent with that of the glass in an ideal state, the deformation degree of the glass of the curtain wall can be determined by processing a deformation signal by using a measurement detection circuit, and the magnitude of stress inside the glass is indirectly obtained through calculation, so that the safety of the glass of the curtain wall can be conveniently and quickly detected in real time on the spot. The invention has the advantages that: 1, by the measurement method, the function of real-time, on-site, quantitative and quick measurement is realized, and the method is low in measurement cost and is safe, convenient, efficient and accurate; and 2, measured data can be accurately and timely sent into a computer, and an intact detection database is established so as to store the measured data, so that a good reference basis is provided for the regular measurement and evaluation in the future.

The invention relates to a battery monomer voltage measuring circuit and a compensation method for measuring error thereof, and belongs to the technical field of power of electromobiles. The circuit comprises a high voltage gating circuit, a high common-mode measuring circuit, an isolation amplifying circuit, an absolute value circuit, a singlechip digital core circuit, a communication circuit and a power circuit. The compensation method for measuring error comprises the following steps: analyzing the measuring error, and obtaining a modifier formula for the monomer voltage measurement. Aiming at the characteristics of a great number of voltage monomers, gradual accumulated potential and high absolute potential in the battery, the high-voltage part and the lower-voltage part are separately arranged, thereby solving the problems of electromagnetic compatibility and high-voltage insulation in the high-density multichannel monomer voltage measurement. The monomer voltage measuring circuit has the advantages of high precision, high reliability, small size and low measurement cost per monomer. The error correction method can be used for acquiring high-precision battery voltage measurement results (the error is less than 10 mV), and is applicable to monomer voltage on-line precision measurement of power batteries for electromobiles.

The invention relates to a calculation method for detecting the flow of the section of a river in a non-contact manner. The method includes the following steps that: step 1, a radar is adopted to detect river surface flow data; step 2, open channel flow cross section flow rate distribution is calculated; step 3, a relationship between a surface flow rate and a water depth is determined; step 4, a relationship between the surface flow rate and the average flow rate of the section is determined; and step 5, the total flow of the section is calculated. According to the calculation method of the invention, a radar remote sensing non-contact measurement method is adopted, so that good maneuverability, flexibility and real-time performance can be realized, and highest detection efficiency can be achieved with smallest measurement cost, a widest detection range can be realized, and measurement can be performed in a non-water-contact manner; and therefore, the calculation method is competent for hydrological surface information measurement under complex geological conditions and external adverse weather conditions.

A high frequency linear modulation radar direction measurement method, characterized by: in the radar far-field, emitting single-frequency continuous sinusoidal signal as a measurement beacon, and the beacon carrying platform uses radar for the center to move for directional scanning; processing time-frequency analysis to the echo received by each radar antenna, to obtain the transient response value of each antenna, and corresponding with the beacons of instantaneous position, which is the antenna direction map. The invention uses a simple single-frequency signal transmission to achieve the measurement and calibration of the direction map, and compared with the traditional transponders measurement method, it greatly reduces system complexity and measurement cost, with inexpensive way to improve the effectiveness of the direction map measurement.

The invention provides a method and a system for measuring parameters of round holes in a plate. The method comprises the following steps: obtaining inner and outer parameters of a multi-view camera; performing image acquisition on the plate by utilizing the multi-view camera to obtain a local plane grey image of the plate; obtaining pixel values of characteristic parameters of linear segment end points and the round holes in the plate according to the local plane grey image; determining local space parameters of the round holes in each pair of binocular camera coordinate systems according to the pixel values of the characteristic parameters of the round holes in the local plane grey image and the inner and outer parameters of the multi-view camera; switching and concatenating the local space parameters of the round holes in each pair of binocular camera coordinate systems through the inner and outer parameters of the multi-view camera, and determining overall space information of the round holes in the plate. According to the scheme, the measurement precision and the completeness of the holes in the plate are improved, the measurement speed of the holes in the plate is increased, and the measurement cost of the holes in the plate is reduced.

The invention relates to a continuous measuring method for an instrumented wheelset, and provides a novel continuous measuring method for an instrumented wheelset and a decoupling algorithm. The continuous measuring method aims to solve problems of low measurement precision, miscellaneous bridge distribution scheme, complicated decoupling algorithm and the like of an existing measuring method of an instrumented wheelset. The method includes measuring the rotation angle of the instrumented wheelset by a first group of bridges; measuring wheel-rail transverse force, perpendicular force and positions of action spots by three other groups of measuring bridges; and carrying out decoupling computation by a kalman filtering method. The first group of bridges consists of two measuring bridges, the first measuring bridge is symmetric relative to a shaft, is arranged on the shaft and outputs sine waves, the other measuring bridge is symmetric relative to a shaft, is arranged on the shaft and outputs cosine waves, and the other three groups of measuring bridges are arranged on the inner side of a wheel plate and only output odd harmonic waves. The continuous measuring method has the advantages of simplicity in bridge distribution scheme and the decoupling algorithm, low measurement cost and more accuracy.

The invention discloses a photographic measurement system for pavement evenness, which comprises a main car with a photographic measurement device and a target car with targets; a mileage coder and a wireless data transceiver module are mounted on the target car; the photographic measurement device on the main car comprises an adjustable camera-mounting platform, a camera, an industrial personal computer and a wireless data transceiver module, the camera, the industrial personal computer and the wireless data transceiver module are mounted on the adjustable camera-mounting platform, and both the signal output end of the camera and the mileage coder on the target car are connected with the signal input end of the industrial personal computer through the wireless data transceiver module. Correspondingly, the invention also puts forward a measurement method based on the photographic measurement system. Under the premise of ensuring the precision and efficiency of measurement, the photographic measurement system and the method can effectively control the measurement cost.

The invention provides a wind power plant field-level yaw control method based on a laser radar wind measuring instrument. The method comprises the following steps that wind speed data and wind direction data of the corresponding positions are measured through laser radars which are arranged in the preset positions of a wind power plant and the laser radars are arranged in preset number; the windspeed data is processed to obtain a wind power plant local single-machine wake flow model; a wake flow model of the whole wind power plant is obtained through the local wake flow model; the current yaw angle correction factors of wind turbine generator sets are calculated according to the wake flow model of the whole wind power plant; the advance wind direction information is measured through thefront-row laser radars and serves as a compensation signal for yaw of the first-row wind turbine generator set; and the wind turbine generator set yaw control is carried out on the basis of a wind direction signal of a wind speed wind indicator and a current yaw correction signal and the compensation signal. According to the control method, the measurement cost can be saved, the accuracy of the wind power plant wake flow model can be improved, and the macroscopic yaw control precision and power capture of the wind power plant are improved, the generating capacity of the wind power plant is improved, and the service life of a yaw system is prolonged.

The invention discloses a fast Fourier transform (FFT) broadband frequency spectrometer based on an AD9864 medium frequency digitization system. After passing an attenuator and a radio frequency switch, a radio frequency input signal is processed through four different channels set according to different measure frequencies. When frequency is smaller than 10MHZz, the radio frequency input signal is directly sampled by AD, frequency measurement is achieved through the FFT, and when the frequency is larger than or equal to 10MHz and smaller than or equal to 4400MHz, the radio frequency input signal is processed through once frequency conversion and the AD9864 and follow-up processing is conducted through a personal computer (PC). The design scheme simultaneously considers user requirements for measurement with large scanning width and high speed, detection is directly conducted and an amplitude value of the input signal is obtained without processing of the AD9864, and therefore the measurement with the large scanning width and the high speed can be rapidly completed. According to the FFT broadband frequency spectrometer based on the AD9864 medium frequency digitization system, the once frequency conversion manner is used for replacing an traditional three-time frequency conversion manner, the PC resources are sufficiently used for replacing requirements of traditional frequency spectrometer for a central processing unit (CPU) with high properties in a medium processing process. Compared with a traditional frequency spectrometer with high properties, the FFT broadband frequency spectrometer based on the AD9864 medium frequency digitization system is simple in design, small in achieving difficulty, low in power consumption and great in reducing user measurement cost.

The invention provides a human body three-dimensional measurement method based on digital images. The method includes the steps that a high-precision scale data form is manufactured through the digital images, human body plane two-dimensional data are measured through the digital image of the front face of a human body, the digital images of the side faces of the human body and the scale form, the vital statistic cross section of the human body is obtained through a three-dimensional scanner, the outline of human body routine measurement is obtained by fitting the human body plane two-dimensional data and the vital static cross section of the human body, and therefore vital statistic data of the human body are obtained. The human body three-dimensional measurement method based on the digital images is achieved on the basis of a human body vital statistic cross section database and two-dimensional digital images and can be used for customization of haute couture, measurement time can be greatly shortened, measurement accuracy and efficiency can be improved, the body size tendency of the human body can be evaluated, and the method is higher in measurement speed, more convenient to operate and lower in measurement cost in comparison with a three-dimensional non-contact measurement method.

The present invention discloses a method for measuring the gain and noise coefficients of the erbium-doped optical amplifier; the measurement comprises the following steps that a DFB light source can be input into a filter through a variable optical attenuator; the output end of the filter is connected with an optical power meter to obtain the input power Pin of EDFA; the input end of the EDFA is suspended and the flat region of the ASE spectrum in the EDFA is utilized for obtaining the ASE power PASE which is in the filter band width from the optical power meter; the DFB light resource signal can be emitted into the EDFA through the variable optical attenuator and the signal amplified by the EDFA and the ASE mixing power Pout are obtained from the optical power meter through the filter; by alternating the variable optical attenuator value, the EDFA gain and noise coefficient curves can be calculated and described. The beneficial effect is that the present invention utilizes the flat region of the ASE spectrum in the EDFA to match with a band-pass filter which can fast and accurately calculate EDFA gain and noise coefficients. The test method of the present invention is simple which greatly reduces measurement cost.

The invention discloses a non-contact type high-precision three-dimensional measurement method and a measurement device for complex optical surface shapes and relates to the technical field of optical surface shape detection, which solves the problems in the prior art that existing measurement methods for the surface shapes of optical elements are high in measurement cost and low in precision and cannot realize the three-dimensional measurement on the surface shapes of optical elements. According to the technical scheme of the invention, the two-dimensional distribution of the height information of an optical surface is acquired through the non-contact three-dimensional coordinate position scanning process, and then the surface shape or the profile information of the optical surface can be measured. A three-dimensional translation platform conducts the translational motion in the x-y direction to realize the point-by-point scanning process of the optical surface, so that the height h variation of the optical surface over all scanning points can be measured. During the scanning process, along with the height h variation of the optical surface, the three-dimensional translation platform is moved in the z direction, so that a spectrum confocal sensor is enabled to always focus the surface of a to-be-measured optical element. A micro three-beam interferometer is aligned with a standard planar mirror. The distance between the surface of the to-be-measured optical element and the standard planar mirror is measured in real time, so that the surface shape information of the to-be-measured optical element can be obtained. The measurement device is low in cost and easy in operation.

The invention discloses a smooth large-curvature sample measurement device and method based on the fluorescent confocal microscopy and relates to the technical field of optical precision measurement, in particular to a device and method for measuring the surface topography of a smooth large-curvature sample through the confocal microscopy. The device comprises an illumination module, a detection module and a coated sample. According to the method, a sample to be measured is made into a coated sample, a fluorescent film on the surface of the sample is excited through the illumination module to emit fluorescence, the surface position of the coated sample is determined by the detection module through the position of the vertex of an axial response curve, finally a three-dimensional scanning image is formed, the film is cleaned, and the state of the sample to be measured before being coated is recovered. With the device and method, the measurement precision and the measurement efficiency can be improved, and the measurement cost can be reduced.

The invention relates to a separating method for indirect subentry measurement of building energy consumption. The method mainly comprises the steps that: (1) the values of the active power, the inactive power, the voltage and the harmonic ratio of the current on a main line aremonitored through an intelligent electric meter in real time, and the monitored data are stored; (2)the startup and stopping signals of consumer devices are detected; (3) the identification of the consumer devices is carried out; (4) the electric energy consumed by the consumer devices is calculated; and (5) the electric energy consumed by the consumer devices is separately counted to achieve the subentry measurement of electric energy. According to the separating method, just one intelligent electric meter is used on the energy consumption monitoring main line, and therefore the trouble of directly measuring the terminal of each consumer device separately by using an electric meter is avoided, so that the measurement cost is low, the structure is simple, the identification precision of the consumer devices is high, and the accurate separate energy consumption counting for a building is achieved.