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

The invention provides a gamma value measuring method of a display apparatus. The method comprises displaying multiple test images in the same image of the display apparatus in a partition mode, the testing image being corresponding to different gray scales, and simultaneously measuring the brightness values of the multiple test images displayed in the same image in the partition mode, such that under the condition that the measuring precision is not changed, the gamma value measuring time can be substantially shortened and the development time of a new product and the production efficiency are improved; and at the same time, in the gamma value measuring method of the display apparatus, a finally measured gamma value result is output through a driving IC output port, whether programming succeeds or not can be identified, and the gamma value measuring efficiency is improved.

Electronic balance with a load carrier, further with a transfer device cooperating with the load carrier, with a draft shield enclosing a weighing compartment that is adapted to the dimension of an object to be weighed and comprises at least one closure element serving to open and close at least one loading access opening, and also with a drive mechanism serving to actuate the closure element, characterized in that the drive mechanism further comprises a position-setting member, wherein the drive mechanism together with the position-setting member and a displacement-transmitting element causes a lifting- and lowering movement of the transfer device relative to the load carrier, and wherein the position-setting member is configured for setting the transfer device and/or the load carrier into several defined positions.

An analyzing method and system includes projecting light onto a specimen, detecting an optical spectrum from the specimen, dividing the detected optical spectrum by a predetermined time interval, applying a weighting vector and a gain and offset vector to the divided spectra to generate a resolution vector, quantizing an analog signal of the resolution vector to a digital signal, and applying a synthesis vector to the quantized spectra to restore the quantized spectra to a size of the optical spectrum. A spectrum having a large amplitude difference is temporally divided and is analyzed by applying different resolutions to individual time intervals. Spectral portions of the spectrum having relatively small peak amplitudes are selected as a region of interest (ROI) to be modified.

A system for measuring bridge bottom deformation by aid of a laser ranging method is formed by a bridge bottom settlement change measuring device and a ground settlement change measuring device, wherein the bridge bottom settlement change measuring device comprises a plurality of laser ranging instruments, a plurality of prisms, a data processing terminal and a computer, and the ground settlement change measuring device comprises a horizontal laser emitter and a plurality of scales. According to the system, the bridge bottom settlement change measuring device on the system is used for measuring deformation data of the bridge bottom relative to the ground, simultaneously the ground settlement change measuring device is used for measuring ground settlement change data, then the data are processed comprehensively to be used for determining deformation conditions of different stages of the bridge bottom in the construction process. Therefore, measuring time can be reduced, accuracy is high, error is small, and improvement of construction quality of a bridge is benefited.

A manual measuring system (an articulated three-dimensional coordinate measuring machine or a gantry three-dimensional coordinate measuring machine) allows a measuring probe to be manually moved while enabling a user to focus on making measurements and allows the user to manually move the measuring probe in order to facilitate and accelerate measurements. The manual measuring system includes a sub-monitor (portable terminal) that is mounted near the tip of the measuring probe. It is possible to display on the sub-monitor a guided route for the measuring probe to a measurement point or to indicate on the sub-monitor that the measuring probe has entered a measurement allowable range or to allow the user to direct by means of the sub-monitor to obtain a measurement value by the measuring probe.

The invention discloses a method for detecting and regulating surface types of a solar heat-collection condenser, belonging to the field of detection and regulation of the surface types of condensers. The detection method comprises the following steps of: setting test points on the solar heat-collection condenser to be detected; acquiring image data of the test points through camera acquisition equipment; transmitting the image data to a data processing terminal; and processing the image data by using the data processing terminal, and thus acquiring position error data of the test points and the corresponding points on standard surface types. According to the method, the surface types of the solar heat-collection condenser are detected by a digital photogrammetry method, standard arc plates are not required to be manufactured and used, manual measurement and detection are not required, a great number of manpower resources are saved, and the measuring time is shortened. Meanwhile, error data acquired by the digital photogrammetry are accurate and reliable, the measurement accuracy is high, condenser reflectors can be quantitatively regulated in a targeted manner, and the efficiency of detection and regulation is improved.

The concentration(s) of element(s) contained in an unknown sample is measured without necessity of judging the sample relying on a human's eye and obtaining information from a supplier of the sample previously. The concentration(s) of trace element(s) such as Cd, Pb and Hg contained in parts for electronic or electric equipment is determined by (1) irradiating the sample with an X-ray so as to identify whether the type of the sample is a nonmetal-based material or a metal-based material; (2) selecting measuring conditions for a fluorescent X-ray analysis depending on the identified type of the sample; and (3) measuring the concentration(s) of one or more element(s) contained in the sample by the fluorescent X-ray analysis according to the selected measuring conditions.

The invention belongs to a near-field measurement method for an antenna array of a virtual feed network. The method includes the steps of firstly, setting a near-field measurement area which accords with antenna array beam scanning ranges and meets sampling theorems, secondly, obtaining near area electromagnetic field vector data of each antenna radiating element sequentially on the same sampling position, and connecting other units not to be measured with matched load, thirdly, after measurement on all units is completed, carrying out vector superposition on measured data of all antenna radiating elements sequentially on the same sampling position according to arbitrary weighting laws, virtualizing a feed network so as to obtain near area electromagnetic field data of the antenna array under the virtual feed network, and lastly, computing electrical characteristics of a far-field area through strict near-field and far-field mathematical manipulation to analyze and estimate performance indexes of the antenna array.

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 invention discloses a body temperature measuring method. The method comprises the steps that an actual body temperature time sequence is obtained through the human body temperature obtained through real-time measurement; according to the actual body temperature time sequence, an auto-regressive-moving-average model built in advance is adopted for obtaining a body temperature observation value time sequence; according to the actual body temperature time sequence and the body temperature observation value time sequence, a neural network model built in advance is adopted for predicting the human body temperature after a preset period of time. Correspondingly, the invention further discloses a body temperature measuring device. By the adoption of the body temperature measuring method and device, body temperature measuring efficiency can be improved.

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.

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.

The invention relates to an integrated device for quantitatively measuring human health, comprising a body composition measurement unit, a pulse pressure wave on-line measurement device, a force quality test unit, a reaction time tester, a three-dimensional force measuring platform, a seat front bend tester and a height measurement unit. Each modular unit is connected by adopting a distributed bus and is controlled by software to perform time-sharing work. The device is an apparatus for testing human performance and health, which features multi-parameters, integration, fastness and low cost, and completes non-invasive collection of physiological information of human body. The test result can be transmitted to the central database of a master control computer by a data transmission line; human performance and health knowledge are combined to analyze human body health condition and variation trend; and reasonable health intervention suggestion is given.

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.

A displacement gauge comprises an objective lens 15 that projects light onto a measurement subject 16, an exciting portion that vibrates the objective lens 15 at a preset amplitude along an optical axis direction of light passing through the objective lens 15, a position detector for detecting the position of the objective lens 15, an objective lens scan portion 52 for scanning the objective lens 15 along a plane orthogonal to the optical axis direction, an objective lens movement detecting portion 53 for detecting the moved position of the objective lens 15, an operation processing portion 58 for calculating a distribution of displacement amount within a measuring area, based on the positional information of the objective lens 15 within the measuring area detected by the objective lens movement detecting portion 53, and the displacement amounts measured at plural measuring points, and an output portion 66 for outputting the result of calculation by the operation processing portion 58.

The invention relates to a method for measuring the large-stress range stress strain in a uniaxial tensile test of a metal round bar sample. The method comprises the following steps: building a step model for gradual expansion of unstable necking of uniaxial tension of the metal round bar sample; measuring the instant gauge length and the minimum sectional radius at a necking position of the roundbar sample after extension instability; building an interpolation curve expression of the necking profile on the basis of necking step coordinates of the necking step model at each moment; calculating the curvature radius at the minimum section of the necking position at the moment by a curvature formula; finally calculating the actual stress and actual strain at the moment through a Bridgman method. By adopting the method, the test measuring link for the necking outer profile curvature radius in the existing method is omitted, and the measuring accuracy of a large-stress range stress straincurve is improved, so that the method has important significance to the mechanical performance test of metal materials.

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.

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.

The invention provides a near-field broadband RCS (Radar Cross Section) data acquisition and compression method based on basis pursuit denoising. Through random down sampling in azimuth and elevation, the actual total measurement amount of the RCS data is reduced, in a condition in which the integrity of electromagnetic scattering characteristic information of a radar target is ensured not to be much lost, the measurement time for the RCS data of an observed target by the radar system is shortened, and thus, the working efficiency of the overall measurement system is improved. According to the basis pursuit denoising model, a sparse reconstruction algorithm combining a near-field broadband RCS data processing operator is used for realizing data compression on echo domain RCS data, loss of the electromagnetic scattering characteristic information of the radar target during the data compression process can be reduced, the calculation complexity and the memory loss of the compression algorithm can be further reduced, and the above data compression process becomes more accurate, quick and efficient.

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.

Low concentrations of silicon in an etchant solution comprising phosphoric acid, an organo-silicon compound and water are analyzed by adding predetermined concentrations of a carboxylic acid and fluoride ions to a test solution comprising a predetermined volume of the etchant solution, and measuring the potential of a fluoride ion specific electrode (FISE) in the test solution. Reaction with silicon ions in the test solution reduces the concentration of fluoride ions, which are present in stoichiometric excess, so that the silicon concentration of the etchant solution can be determined from the difference between the predetermined and measured concentrations of fluoride ions in the test solution.

The invention discloses a method and apparatus for measuring the thermal characteristic of an LED. The method comprises a dynamic scaling phase and a static measuring phase. In the dynamic scaling phase, the LED is respectively placed in different environment temperatures for introduction of current pulses for many times to measure the voltage current characteristic curve of the LED at the different temperatures; and in the static measuring phase, working currents are introduced to the LED, the voltages and current values of the LED are measured, and the temperature rise curve of the LED is solved through combination with the voltage current characteristic of the LED at the different temperatures. The apparatus for measuring the thermal characteristic of the LED comprises a pulse constant current control circuit, a data collector and a temperature control unit. By using the method for measuring the thermal characteristic of the LED, through combination adoption of dynamic scaling and static measuring, improves the accuracy of the temperature rise curve and shortens the measuring time at the same time.

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.

The invention discloses a lateral force detector for four wheels of an automobile, and the lateral force detector includes at least four measuring platforms and a lateral force detection device, wherein the measuring platforms are connected with the lateral force detection device respectively; several measuring rollers are arranged on each of the measuring platforms; the measuring rollers are parallel to wheel axles of the automobile, and are respectively connected with pressure sensors and angular speed sensors; and the pressure sensors and the angular speed sensors are respectively connected with the lateral force detection device to send the pressure and angular speed data of the wheels to the lateral force detection device. The lateral force detector for the four wheels of the automobile can measure the lateral forces of all wheels at a time, is convenient and fast, simplifies the measuring steps, and saves the measuring time.

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.

The invention discloses an industrial Internet of Things (IoT) parameter measurement method based on an improved BP neural network. The method includes training of a BP neural network, improvement ofthe BP neural network, and parameter online measurement method work flow of the BP neural network. The method of the invention has a good effect in real-time online measurement of parameters in an intelligent manufacturing IoT system, and can shorten the measurement time of the parameters of the industrial IoT system and improve the feedback regulation speed of the system.

In a method as well as a magnetic resonance tomography apparatus for implementation of such a method for improved sensitivity-encoded magnetic resonance imaging using a two-dimensional or three-dimensional acquisition coil array, two-dimensional or three-dimensional undersampling of k-space is undertaken by measurement of a number N of basic partial trajectories τ_n in k-space that in their entirety form a geometric arrangement of source points, a number M of different operators C_m(Δk_m) are determined, with each operator representing an algebraic transformation with which unmeasured target points at an interval Δk_m from one of the measured source points are synthesized from a number of measured source points, the operators C_m(Δk_m) are applied to at least one subset of the measured source points for at least partial completion of the magnetic resonance data set, and a largely artifact-free image is reconstructed in three-dimensional space on the basis of the measured source points and the synthesized data points.

The invention relates to an automatic detection focimeter and a detection method. The automatic detection focimeter includes a drive mechanism, a lens frame fixing mechanism and a rack. The drive mechanism is fixed on the rack. The lens frame fixing mechanism is fixed on the front end of the drive mechanism. An optical source device with an optical source plate, a micropore plate device and a lens barrel is mounted on the drive mechanism. The optical source device is located right above a CCD board fixing seat. The CCD plate fixing seat with a CCD image sensor is mounted on the rack. A Hartmann grating lens mount with a Hartmann grating is connected right above the CCD board fixing seat. A lens holder is connected right above the Hartmann grating lens mount. The centers of the optical source device, the lens holder, the Hartmann grating lens mount and the CCD image sensor are on the same center line in the detection process. The automatic detection focimeter and the detection method in the invention has the advantages of saving time and effort and accurately and normatively performing the lens optical center detection.

The invention provides an efficient measurement element, device and method for integrated gear errors, and belongs to the field of the precision testing technology and instrument and the mechanical transmission technology. The combined standard element is composed of two measurement half-gears in a combined mode, wherein the two measurement half-gears are installed coaxially, can rotate independently and are respectively provided with a circular grating, and the independent angle position of each measurement half-gear can be measured; meanwhile, the device and method using the element for conducting specific gear measurement are provided. According to the efficient measurement element, device and method, the defect that one-side tooth surface measurement can be completed only after a measured gear rotates by two or more circles during integrated gear error measurement at present is overcome, one-side tooth surface measurement can be completed only after the measured gear rotates by one circle, and in the measurement process, under the condition that the measured gear rotates at the same speed, measurement time can be shortened by more than one time after the measurement method is adopted.

Disclosed are an apparatus for detecting pipe wall thinning, which measures a natural frequency of a pipe and determines a level of the pipe wall thinning, and a method thereof.

The apparatus for detecting the pipe wall thinning includes a hitting member 10 for hitting the pipe T, a vibration measurement sensor 20 which measures a vibration signal generated when the pipe T is hit with the hitting member 10, and a control part 30 which compares the natural frequency calculated from the vibration signal measured from the vibration measurement sensor 20 with a natural frequency generated from a normal pipe in which wall thinning does not occur, and determines the level of the wall thinning of the pipe T.