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97results about How to "Reduced measurement time" patented technology

Human body three-dimensional measurement method based on digital images

InactiveCN103535960AReduced measurement timeHigh measurement accuracyClothes making applicancesMeasurement costThree dimensional measurement
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.
Owner:WENZHOU POLYTECHNIC

Method and device for computing gains of multiple receiving links/transmitting links

The embodiment of the invention provides method and device for computing the gains of multiple receiving links/transmitting links, which belong to the technical field of wireless communication. The method comprises the following steps of: dividing one path of calibrating signal into multiple paths, and respectively coupling each path of calibrating signal to each receiving link; measuring the frequency compensation and temperature compensation data of the link in which one path of calibrating signal is before being divided into multiple paths; calibrating the receiving link to obtain the relevant peak amplitude value of each receiving link; and obtaining the gain of the calibrated link, and computing the gain of each receiving link. The device comprises a signal processing module, a divider, multiple directional couplers and a measuring module, wherein the signal processing module comprises a signal sending unit, a calibrating unit and a computing unit. The invention reduces the workload of measuring the gains of multiple receiving links and the gains of multiple transmitting links in a multi-antenna system, saves the measuring time and improves the accuracy and the consistency of the gains of the receiving/transmitting links.
Owner:SHENZHEN HUAWEI AGISSON ELECTRIC CO LTD

Method for detecting residual austenite in steel plate on line

The invention provides a method for detecting residual austenite in a steel plate on line. An X-ray diffraction method is adopted and the method comprises the following steps of: firstly, placing an X-ray tube, an X-ray probe and an angular instrument at a position close to a tension wheel in a production line where a steel band passes; arranging the X-ray tube and the X-ray probe on the same angular instrument, and keeping the focal point of the X-ray tube, the surface of the steel band and a receiving gap on the same diffraction focal circle so that the surface of the steel band and the central line of the angular instrument are coplanar, wherein the X-ray tube and the X-ray probe which are relative to the surface of the steel band rotate at the same angular speed, and the surface of the steel band is always tangent with the diffraction focal circle; and recording the diffraction intensity of an X-ray by using a computer and calculating the quantity of the residual austenite and the carbon content in the residual austenite. By the method, the quantity of the residual austenite and the carbon content in the residual austenite in high-intensity steel plates such as TRIP, Q&P and the line can be detected in real time on line; and guarantee can be provided for correctly regulating and controlling the quantity of the residual austenite and the carbon content in the residual austenite in the high-intensity steel plates.
Owner:BAOSHAN IRON & STEEL CO LTD

Measuring device and method of hydraulic characteristic parameters of unsaturated soil in moisture absorption/desorption path

The invention provides a measuring device of hydraulic characteristic parameters of unsaturated soil in a moisture absorption/desorption path, which comprises a pedestal, a sample container, a semi-permeable membrane, a silk screen, a weighing device, an accommodating bottle, a water inlet pipe, and a water outlet pipe; the sample container is provided with a chamber for accommodating a soil sample to be measured; a cover plate is disposed at the top of the sample container; the chamber of the sample container is tightly fastened with the pedestal; the silk screen is disposed on the pedestal; the semi-permeable membrane is layed on the silk screen; a soil water potential measuring instrument is disposed on the pedestal; a peristaltic pump is disposed at the water inlet pipe; the water inlet pipe and the water outlet pipe pass through the pedestal; one end of each of the water inlet pipe and the water outlet pipe is communicated with the chamber, and the other end of each of the water inlet pipe and the water outlet pipe is communicated with the accommodating bottle; the water inlet pipe is also provided with the peristaltic pump. The device of the invention controls the suction and the moisture absorption/desorption path of the soil sample by dialysis technology, prevents the influence of wetting front, shortens the measuring time, and can measure hydraulic characteristic parameters of unsaturated soil in the moisture absorption path. The invention also provides a measuring method of hydraulic characteristic parameters of unsaturated soil.
Owner:HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL

Display screen chromaticity measurement method and device and terminal equipment

ActiveCN111256826AReduced measurement timeImprove efficiencyTesting optical propertiesColor measuring using electric radiation detectorsImage detectorWave band
The invention discloses a display screen chromaticity measurement method and device and terminal equipment. The measurement method comprises the following steps of: obtaining multi-channel image data,shot by an image detector, of a to-be-detected display screen, and dividing the image plane of the image detector into a plurality of identical image capture arrays, wherein each image capture arrayis provided with a plurality of spectral response channels with different spectral transmittance, and each spectral response channel correspondingly receives an incident light signal of one waveband;extracting and calibrating response values of a plurality of spectral response channels in each image capture array from the multichannel image data, and obtaining tristimulus values of all pixel points in the display screen to be detected; and obtaining sample information of multiple spectral response channels of the display screen at the same time through one-time image capture by utilizing themulti-channel image detector, so that spectral deviation of the display screen caused by tiny difference of the manufacturing process can be eliminated, and the measurement precision and the robustness of the measurement result are improved.
Owner:WUHAN JINGLI ELECTRONICS TECH +1

Highly-stable rotating-mirror interferometer

ActiveCN104034422AGuaranteed self-stabilityReduced measurement timeInterferometric spectrometrySystem structureMichelson interferometer
The invention discloses a highly-stable rotating-mirror interferometer comprising a first beam splitter, a second beam splitter, a first plane reflecting mirror, a second plane reflecting mirror, a third plane reflecting mirror, a connecting mechanism and a tilt reflecting mirror. The beam splitting film of the first beam splitter is parallel to the first plane reflecting mirror; the second plane reflecting mirror and the third plane reflecting mirror are arranged parallelly to form a parallel reflecting mirror group fixedly connected to a rotary shaft; the parallel reflecting mirror group and the connecting mechanism are fixedly arranged, and the first beam splitter, the first plane reflecting mirror and the connecting mechanism are fixedly arranged; the tilt reflecting mirror is provided with a tilt angle, and the emergent light of the parallel reflecting mirror group vertically enters the tilt reflecting mirror. The incident light and the emergent light are parallel to each other by arrangement of the pair of parallel plane mirrors, system self-stability is improved and detection time is reduced by rotation of the first plane reflecting mirror and plan mirror group, system structure is simple, and processing, mounting and adjusting difficulties and production cost are lowered.
Owner:ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI

Device and method for realizing the function of spectrum analysis on vector network analyzer

The invention proposes a device for realizing the function of spectrum analysis on a vector network analyzer, comprising an intermediate frequency regulation unit, an analog-to-digital conversion unit, a digital signal processing unit, and a programmable time clock generating unit. The intermediate frequency regulation unit enlarges and filters the intermediate frequency signal that enters the device; the analog-to-digital conversion unit performs analog-to-digital conversion to the regulated intermediate frequency signal so as to obtain a high-speed serial sampling signal; the digital signal processing unit carries out serial-parallel conversion to the sampling signal and then performs digital lowering frequency conversion, digital filtering, and frequency spectrum analyzing. The programmable time clock generating unit is able to provide a programmable differential sampling clock to the analog-to-digital conversion unit. The device and the method of the invention requires only one time connection to a single vector network analyzer by the user to realize the high performance network parameter measurement and frequency spectrum measurement to a tested component, which simplifies the complexity of measurement operations by the user and shortens the measurement time.
Owner:THE 41ST INST OF CHINA ELECTRONICS TECH GRP

Method for determining content of total selenium, inorganic selenium and organic selenium of selenium yeast

ActiveCN104931468AAvoid volatile lossReduced measurement timeFluorescence/phosphorescenceRound-bottom flaskCyclohexanes
The invention discloses a method for determining content of total selenium, inorganic selenium and organic selenium of selenium yeast. The method comprises the steps: heating and digesting a sample in hydrochloric acid to uniformly reduce selenium in the sample to be quadrivalence selenium, generating a piaselenole complex by virtue of the quadrivalence selenium and 2,3-diaminonaphthalene (DAN) under the subacidity condition, and extracting by utilizing cyclohexane; determining fluorescent intensity by utilizing a fluorophotometer, and calculating the content of selenium in the sample. 3mL of mixed acid is used for determining the total selenium, so that the consumption of the mixed acid can be greatly reduced; the digestion and extraction are carried out in a water bath in a round-bottomed flask with a cover, so that the pollution of strong oxidation reductive acid on the environment of a laboratory can be avoided, the volatile loss of selenium can be prevented, and the recovery rate is relatively high; the consumption of a cresol red indicator agent is canceled, so that the interference of the sample on the judgment of the color variation of the indicator agent can be avoided, and the interference of the indicator agent on a to-be-detected solution can be reduced. The determination time of the total selenium and inorganic selenium is greatly shortened, and the digestion of total selenium and extraction of inorganic selenium can be completed in about one hour.
Owner:ZHEJIANG UNIV

Method for testing direct-current resistance of transformer

The invention discloses a method for testing direct-current resistance of a transformer. The method includes the steps: connecting a first series branch consisting of a first current source and a first standard resistor between an output end of a first winding and an output end of a second winding; connecting a second series branch consisting of a second current source and a second standard resistor between an output end of a second winding and an output end of a third winding; respectively measuring the voltage among the output end of the first winding, the output end of the second winding, the output end of the third winding and a neutral point and the voltage of the first standard resistor and the second standard resistor; calculating the current of the first standard resistor and the second standard resistor; and calculating the working resistance of the first winding, the second winding and the third winding. Besides, the current flowing through the second winding is equal to the sum of the current flowing through the first series branch and the current flowing through the second series branch. By the method, the working resistance of the three windings can be simultaneously measured once when the transformer is positioned at the same gear, operation is simple and easy, measuring time is greatly saved, and measuring efficiency is improved.
Owner:保定市金源科技有限公司
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