908results about How to "Short measurement time" patented technology

An apparatus includes a plurality of sensor modules that are disposed at spacings with respect to one another, each sensor module having a local oscillator device. The oscillator device generates an oscillator signal that is passed on to a transmit / receive device, and the oscillator signal is radiated. The transmit / receive device is set up such that it can receive signals reflected from the object. A phase detection device is coupled at one input to the oscillator device and at a second input to the transmit / receive device. Based on the oscillator signal and the received reflected signals, the phase detection device determines a phase signal. A control and signal-processing device determines, based on the spacings of the sensor modules with respect to one another and the phase signals, a direction of the object with respect to the sensor module.

A hand-held measurement device for appearance analyses includes a measurement array which comprises a number of illumination means for applying illumination light to a measurement field in at least three illumination directions and a number of pick-up means for capturing the measurement light in at least one observation direction. The illumination directions and the observation directions lie in a common system plane. At least one pick-up means is embodied to spectrally gauge the measurement light in a locally integral way, and at least one imaging pick-up means is embodied to gauge the measurement light in terms of colour in a locally resolved way. The spectral pick-up means and the locally resolving pick-up means are arranged such that they receive the measurement light reflected by the measurement field under the same observation conditions and in particular from the same observation direction.

The invention relates to a method for the taking of a large number of distance images comprising distance picture elements, wherein electromagnetic radiation is transmitted in each case in the form of transmission pulses using a plurality of transmitters arranged in an array for each distance image to be taken and reflected echo pulses are detected using a plurality of receivers arranged in an array, with the respective distances of objects at which the transmission pulses are reflected and forming a distance picture element being measured by determining the pulse time of flight, wherein a plurality of individual measurements are carried out using a time measuring device connected after the receiver array for each distance image to be taken, in which individual measurements a respective pulse chain is processed which includes a logical start pulse derived from the respective transmission pulse and at least one logical receiver pulse formed from an echo pulse or a noise pulse, wherein the logical receiver pulses are each generated by means of at least one reference of the receiver, the reference being broken through by the underlying echo pulses or noise pulses, with an exceeding of the reference forming the positive flank of the receiver pulse defining an up event and a falling below of the reference forming the negative flank of the receiver pulse defining a down event, wherein, for each distance image to be taken, the associated pulse chains are formed in that the start pulses and the associated receiver pulses are each combined at the right time, the pulse chains formed in this manner are distributed over an array of time measuring channels formed by the time measuring device in accordance with a pre-settable measurement procedure, and, for each time measuring channel, the time durations are determined which, in each case with reference to a point in time before the start pulse, pass until a receiver pulse in that, for each up event and / or for each down event, at least the respective clock pulses are counted which are made available by a central clock at a known frequency, and the counter results are stored as an event list in an arrangement taking account of their respective time information, and wherein the stored event lists of all time measuring channels are read out and evaluated in order to convert the respective time information contained in the event lists into distance values corresponding to the distance picture elements.

The invention discloses a bracelet capable of collecting multi-parameter health indexes. The bracelet comprises a body and a wrist strap. The body comprises a shell body, a displaying screen, a power supply, a clock part and a main control system. The displaying screen, the power supply, the clock part and the main control system are arranged in the shell body. The main control system comprises a main printed board, a microprocessor, a storage, an analogue signal processing chip and a Bluetooth transmission device. The microprocessor, the storage, the analogue signal processing chip and the Bluetooth transmission device are arranged on the main printed board. An infrared temperature sensor, an alarming device, a gravitational acceleration sensor for step counting and a charging connector are arranged on the main printed board. A flexible connecting wire cable, a measuring printed board, a body surface temperature sensor, a photosensitive sensor and a light source are arranged on the wrist strap. The body surface temperature sensor, the photosensitive sensor and the light source are integrated on the measuring printed board. A tensioning device is arranged on the wrist strap. The bracelet is small and light, wearing and using are convenient, various health parameters can be monitored accurately, human body parameters are collected near the Neiguan point under a wrist of a palm side, the number of blood vessels under the wrist is large, pulsation is obvious, and accordingly the accuracy of data testing and obtaining through the bracelet is greatly improved.

An endoscope-like image taking method includes providing at least one peculiar index, which can be discriminated from other portions on an MR image, at the tip of a catheter, previously inserting a metal guide wire for guiding the catheter into a body cavity of a patient inserting the catheter into the body cavity along the guide wire, executing an MR imaging sequence of a plurality of sliced images intersecting the guide wire, reconstructing three-dimensional image data based upon the nuclear magnetic resonance signals, which are received by the guide wire, and determining the tip position and the inserting direction of the catheter by detecting the peculiar index provided at the tip of the catheter based upon the three-dimensional image data, and reconstructing the center projected image using the three-dimensional image data and setting the tip position and the inserting direction of the catheter as a view point and a line-of-sight direction and displaying the center projected image on a display means.

A method of qualifying a diffraction grating comprises performing plural measurements by illuminating a region of the grating with a beam of measuring light and detecting an intensity of measuring light diffracted by the grating into a 0th diffraction order. A wavelength of the measuring light or a polarization of the measuring light or an angle of incidence of the measuring light onto the diffraction grating is varied between subsequent measurements. A shape parameter of diffracting elements forming the grating comprises a pitch, height or width of structural features of the diffracting elements. The shape parameter is advantageously used in analyzing interferometric measurements performed on optical surfaces during manufacture of optical elements of a high accuracy.

The invention belongs to the technical field of test and measurement, provides a system and method for measuring vehicle outline dimensions based on machine vision and a laser light curtain, and high-precision, real-time and rapid measurement for feature sizes such as the length, width and height of a vehicle can be achieved on the premise of not influencing the normal running state of the vehicle. According to the technical scheme, the system for measuring the vehicle outline dimensions comprises a vehicle outline length dimension measuring module, a vehicle outline width dimension measuring module and a vehicle outline height dimension measuring module. Furthermore, a group of one-dimensional laser detector arrays are installed on a position, relative to the same height of the transverse laser light curtain, of the other side of a running measuring area of a vehicle to be measured, and the one-dimensional laser detector arrays are used for detecting laser beams output by the transverse laser light curtain sheltered by a vehicle which is not tested. The system and method for measuring vehicle outline dimensions based on machine vision and the laser light curtain are mainly applied to vehicle detection.

The invention discloses a high-speed and high-precision tank volume measurement method and device based on three-dimensional laser scanning. The method comprises the steps of making an experimental scheme and controlling the data collection quality; collecting and acquiring three-dimensional point cloud data of the outer surface of a tank through a three-dimensional laser scanning platform; carrying out spatial three-dimensional modeling and establishing a three-dimensional model of the tank through the acquired three-dimensional point cloud data of the outer surface of the tank; analyzing the three-dimensional model of the tank and calculating the volume of the tank through the section method. According to the method, the volume of tanks such as tank trucks, storage tanks and tank containers can be quickly and accurately measured, operation is simple, the safety is high, the labor intensity is low, the data processing time is greatly shortened, influence of materials of the tanks and the like is reduced, and data calculation is convenient. The method can adapt to different work environments and is particularly suitable for the quality supervision department to calibrate and retest the volume of the tanks quickly.

The invention discloses a water level-flow speed-flow rate monitoring integrated device, a water level-flow speed-flow rate monitoring system and a water level-flow speed-flow rate monitoring method. The device comprises a radar water level measuring module, a radar flow speed measuring module, a wind speed measuring module and a flow rate calculating module, wherein the radar water level measuring module, the radar flow speed measuring module and the wind speed measuring module are connected with the flow rate calculating module respectively; the radar water level measuring module is used for measuring the real-time water level data of a river course / channel in a non-contact form; the radar flow speed measuring module is used for measuring the real-time surface flow speed data of the river course / channel in the non-contact form; the wind speed measuring module is used for measuring real-time wind speed data to correct a flow speed of a water surface; the flow rate calculating module is used for calculating to obtain the size of the flow rate of a controlled section of the river course / channel at a current moment by combining with an input relevant parameter of the controlled section of the river course / channel according to the water level data, the flow speed data and the wind speed data. The device can be used for monitoring the water level and the flow speed of the river course / channel in real time, and moreover, can be used for realizing monitoring the flow rate in real time.

The invention relates to a method and a device for measuring a ring-opening radon exhalation rate in an open loop way. The method comprises a measurement process and a calculation method. When the measurement is performed, after a radon collecting cover is covered on the surface of a medium to be measured, ends A and B of an electromagnetic tee valve are connected; a constant flow pump is opened to continuously suck in clean air from outside; when exhaust is performed for a given reference balance time, ends A and C of the electromagnetic tee valve are connected; when exhaust is performed to allow radon concentration in a measuring room to be consistent with that in the radon collecting cover, the constant flow pump and the electromagnetic tee valve are closed and measurement is performed to obtain a balanced radon concentration C; and the radon exhalation rate J is calculated through the balanced radon concentration C. The measuring device provided by the invention consists of the radon collecting cover, the sampling constant flow pump, high-efficiency 222RN and 220Rn sub-filters, a drier, the electromagnetic tee valve and a measuring module, wherein the measuring module comprises a measuring chamber, a semiconductor probe, a secondary instrument, a preamplifier and a high-voltage module.

A lithium ion battery internal health feature extraction method based on an impedance spectrum, and relates to the new energy research field; an existing method uses an EIS to analyze and estimate a SOH, wherein the EIS is long in measuring time, and cannot realize online measurements; the lithium ion battery internal health feature extraction method comprises the following steps: building a lithium ion battery electrochemistry impedance spectrum mathematics model; fast measuring a lithium ion battery electrochemistry impedance spectrum, and obtaining the lithium ion battery electrochemistry impedance spectrum; using the lithium ion battery electrochemistry impedance spectrum mathematics model to identify the lithium ion battery electrochemistry impedance spectrum parameters respectively under high, medium and low frequency stages, thus obtaining the lithium ion battery model parameters; periodically measuring the electrochemistry impedance spectrum of the aged lithium ion battery, using the lithium ion battery electrochemistry impedance spectrum mathematics model to identify the lithium ion battery electrochemistry impedance spectrum parameters of the aged lithium ion battery, thus obtaining the model parameter changing rules in the lithium ion battery aging process, and serving as the features that evaluate the battery health states. The lithium ion battery internal health feature extraction method is used for evaluating the battery health states.

The invention discloses an ultrasound bone density measuring and analyzing system. The system comprises an ultrasound parameter measuring apparatus, a communication interface and a human machine interaction device, wherein the ultrasound parameter measuring apparatus comprises transmitting unit consisting of a pulse generator, a high-voltage pulse excitation module and a transmitting probe, an ultrasound receiving unit consisting of a receiving probe, a simulation pretreatment module, a gain adjustable amplifier, a phrase comparator, a high-speed ADC and an asynchronous FIFO, and a central processor, a power supply control module and a structural body. the human machine interaction device controls the ultrasound parameter measuring apparatus through the communication interface to measure the width of a calcaneus of a detected person, the transmission speed of an ultrasound wave in the calcaneus, broadband ultrasonic attenuation to calculate the bone intensity indexes and the bone density, so a medical report can be made according to diagnostic standards of osteoporosis and a special data base can be built for long term use. The system adopts wet or dry coupling and other technologies to improve the precision and accuracy of measure and has the advantages of easy carrying, low cost, no damage caused by radiation and can be use in long term monitoring of bone condition of the detected person.

The invention relates to a welding structure residual stress ultrasonic lossless measurement device and a method, in particular to a device and a method using ultrasonic for measuring the residual stress of a welding structure, belonging to the residual stress measurement field. The method aims at overcoming the problems of a traditional stress measurement method that work pieces are destroyed, time is consumed and the residual stress measurement can not be satisfied under the service condition of the welding structure. The two ends of a probe group of the invention are respectively connected with an impulse signal source and a signal receiving processing device which is connected with a display. And a microcontroller is embedded in the signal receiving processing device. In said method, the coordinate of a measured point is determined; the probe group emits impulse signals sent out from the impulse signal source into a work piece through a first critical refraction angle to generate critically refracted longitudinal waves, wherein, enveloping data are read by the signal receiving processing device and are discretized into digital signals and FIR filtering waves; total enveloping weight eigenvalue Mn is worked out; abnormal data are removed according to Brubbs criterion after one measured point is measured for a plurality of times, measuring position is changed for measuring again, and Mn and Mn+1 are worked out according to two measuring points to calculate the residual stress Delta of the work piece.

The invention relates to an online water quality monitoring device and method based on full spectra. The device comprises a pulse xenon lamp, a cleaning module, a spectrum measuring module and a control unit. One end of the cleaning module is connected with the pulse xenon lamp, the other end of the cleaning module is connected with the spectrum measuring module, the control unit controls the pulse xenon lamp to emit pulse light, controls the cleaning module to clean a measuring surface as needed and carry out light path switching, and controls the spectrum measuring module to read the light signal intensity of each waveband. According to the online water quality monitoring device and method based on full spectra, ultraviolet visible full waveband absorbing spectra are adopted for measuring the water pollution condition, factors such as COD, BOD, TOC, nitrate, nitrite, the turbidity and chromaticity can be measured, and the online water quality monitoring device and method based on full spectra have the advantages of being high in measuring precision, short in measuring time, large in number of monitoring factors, free of a reagent and secondary pollution and the like; the changing condition of water pollution is reflected in real time, and corresponding chemical models can be established according to ingredients of field water samples to meet the demands for measuring different water bodies.

An endoscope-like image taking method of the present invention includes a preparation step of providing at least one peculiar index, which can be discriminated from other portions on an MR image, at the tip of a catheter, a first step (S1) of previously inserting a metal guide wire for guiding the catheter into a body cavity of a patient into which the catheter is inserted, a second step (S2) of inserting the catheter into the body cavity along the guide wire, a third step (S3) of executing an MR imaging sequence of a plurality of sliced images intersecting the guide wire, a fourth step (S4) of reconstructing three-dimensional image data based upon the nuclear magnetic resonance signals, which are generated from the patient when the sequence is executed and are received by the guide wire, and determining the tip position and the inserting direction of the catheter by detecting the peculiar index provided at the tip of the catheter based upon the three-dimensional image data, and a fifth step (S5) of reconstructing the center projected image using the three-dimensional image data and setting the tip position and the inserting direction of the catheter as a view point and a line-of-sight direction and displaying the center projected image on a display means, thereby an endoscope-like image, which is observed from the catheter in the body cavity of the patient, is taken and displayed in real time or semi-real time so that the insertion of the catheter is supported.

An imaging device for biochemical or medical samples, the pulse mode light source of which incorporates flash lamps and a rotating mirror in an inclined position, the said mirror reflecting the light emitted by each flash lamp in turn along the same optical path to the sample. The flash lamps are switched on alternately in phases and synchronised with the rotating mirror and the emission light chopper, which comprises two rotating discs. The turning mirror directs the light at the sample from above and / or below, in which case a double-acting transparent scattering plate can be used.

The invention discloses a method for measuring coal sample methane adsorbing capacity through low-field nuclear magnetic resonance. According to the method, selected measuring parameters are used for carrying out low-field nuclear magnetic resonance measurement on powder coal samples after methane adsorption balance under set pressure, the nuclear magnetism T2 spectrum of methane in the coal samples is obtained, then signal amplitude integrals of the first spectrum peak (in the range of 0.1-4ms spectrum) on the left of the T2 spectrum are substituted to a hydrogen content index reticle equation of methane under the standard condition built through an experiment, the standard condition size of methane adsorbed by the coal samples is obtained, and therefore the methane adsorbing capacity of unit mass of coal under the set pressure is obtained. According to the method, the scale relation of methane mass and nuclear magnetic resonance 1H nuclear signals is built, the quantitative assay of methane adsorbing capacity under the same temperature and different pressures is achieved, and the novel method can be used for measuring coal methane absorbing capacity in a real-time, home-position and dynamic mode.

The invention discloses a device and a method for detecting sulfur trioxide (SO3) in flue gas on line. The device comprises a flue gas collecting unit, a gas liquid separator, a gas phase detection unit, a first solution tank, a liquid phase detection unit and a digital control unit, wherein the gas liquid separator is used for condensing SO3 in the flue gas from a flue gas sampling unit into sulfuric acid liquid drops and separating the sulfuric acid liquid dropsfrom gas phase; the gas phase detection unit is used for measuring the flow of the gas phase from the gas liquid separator; the first solution tank is used for providing an absorption liquid to the gas liquid separator and mixing the absorption liquid with the sulfuric acid liquid drops to form mixed liquid; the liquid phase detection unit is used for measuring the mass of the transformed SO3 in the mixed liquid from the gas liquid separator; and the digital control unit is used for calculating the SO3 concentration of the flue gas according to the detection results of the gas phase detection unit and the liquid phase detection unit. According to the device and the method, on-line measurement of the SO3 of the flue gas is realized, the SO3 of the flue gas is sampled and the SO3 content is analyzed, so that a coal-fired power plant can take corresponding measures conveniently, the SO3 content of the flue gas is controlled, the corrosion to a flue and equipment is reduced, and the heat loss due to exhaust smoke of a boiler is reduced to the maximum degree.

A nucleic acid molecule is provided which is initially catalytically inactive but which can complex with a specific co-factor, e.g., a nucleic acid molecule or a non-nucleic acid molecule, to form a catalytically active nucleic acid molecule. The catalytically active nucleic acid molecule can be used to detect the presence of a non-nucleic acid co-factor or of a nucleic acid co-factor using the nucleic acid sequence of the present invention.

The invention discloses a method and device for measuring thickness and refractive index of a thin film and an application thereof. The method comprises the following steps of: projecting at least three light beams onto the same point or position on the surface of a thin film sample in different incident angles, receiving intensity of a reflected light beam by an array photoelectric detector, comparing the intensity with the light intensity of an incident light beam, calculating the refractive index of each light beam, and finally fitting with a theoretical formula to obtain the thickness and the refractive index of the thin film to be measured. The device comprises a power supply, a transmission grating, a diaphragm, a condenser lens, a polarizer and a sample rotating platform are sequentially arranged along optical axis; axis of the sample rotating platform is coincided with the axis of a photoelectric detector rotating platform, wherein the diameter of the photoelectric detector rotating platform is more than the diameter of the sample rotating platform; and a photoelectric detector, a signal sampling, amplifying and AD conversion circuit and a computer which are arranged on the photoelectric detector rotating platform are sequentially connected. The method and device disclosed by the invention have the characteristics of fast measuring speed and high spatial resolution, and integrated circuits (IC) and / or functional thin-film devices can be detected in a large scale.

Methods are presented for analysing semiconductor materials (8), and silicon photovoltaic cells and cell precursors in particular, using imaging of photoluminescence (12) generated with high intensity illumination (16). The high photoluminescence signal levels (16) obtained with such illumination (30) enable the acquisition of images from moving samples with minimal blurring. Certain material defects of interest to semiconductor device manufacturers, especially cracks, appear sharper under high intensity illumination. In certain embodiments images of photoluminescence generated with high and low intensity illumination are compared to highlight selected material properties or defects.

The invention relates to a method for measuring a liquid phase diffusion coefficient, and an apparatus thereof, and belongs to a method for measuring a diffusion coefficient of a liquid by adopting yellow light LED as a light source based on a capillary imaging method. According to the present invention, a transparent capillary is adopted to construct a liquid phase diffusion cell; the specific refractive index spatial resolution measurement capability of the capillary imaging method is adopted to directly observe and record the diffusion regularity of the thin layers of the diffusion medium in the capability, wherein the thin layers of the diffusion medium have the same refractive index; the liquid phase diffusion coefficient is calculated based on the Fick second law. With the present invention, the diffusion coefficient between glycerol and purified water is measured at a room temperature of 25 DEG C, with comparing the diffusion coefficient 0.720*10<-5> cm<2> / s reported by the literature of the traditional holographic interferometry method with the diffusion coefficient 0.715*10<-5> cm<2> / s measured by the method of the present invention, the relative error is 0.69%; the capillary is adopted to construct the liquid phase diffusion cell, such that the amount of the required sample is less, the measurement speed is rapid, the anti-interference capability is strong and the system stability is good.

The invention discloses a temperature measurement equipment, method and device. The equipment comprises an infrared temperature measurement module, an environment temperature measurement module and amicro processor, wherein the infrared temperature measurement module is used for measuring human body temperature according to an infrared signal radiated by a human body and sending acquired infraredtemperature measurement data to the micro processor, the environment temperature measurement module is used for measuring temperature of the surrounding environment of the human body and sending acquired environment temperature measurement data to the micro processor, the micro processor is used for constructing a temperature field compensation model and acquiring the human body temperature measurement result according to the temperature field model when receiving the infrared temperature measurement data and the acquired environment temperature measurement data. The equipment is advantaged in that the body temperature data of a measurement object can be acquired through the temperature field compensation model, measurement accuracy is high, the measurement time is short, efficiency is high, the measurement process is simple and convenient, and user experience is effectively improved.

An ellipsometer measures any point of a sample by a first spectrometer and a second spectrometer. The ellipsometer performs analysis based on the measurement results obtained by the first spectrometer, performs analysis based on the measurement results obtained by the second spectrometer, and calculates an approximation formula for approximating the analysis results obtained by the second spectrometer to the analysis results obtained by the first spectrometer. The remaining points of the sample are measured with the second spectrometer, and the results of analysis using the measurement results are corrected based on the approximation formula.

The invention discloses a dynamic detecting device and an adjusting method for misalignment of a rotating machine. The dynamic detecting device comprises a control cabinet, a testing platform, a stepping motor and a base board, wherein the top surface of the testing platform is provided with a guiderail. The lower part of the base board is embedded on the guiderail through a chute. The base board can slide on the guiderail. The lower part of the base board is connected with a lead screw through a nut in a threaded connection manner. One end of the lead screw is connected with output shaft of the stepping motor. The adjusting method comprises the steps of (1) testing whether the rotating machine is complete; (2) adjusting an eddy current sensor to an appropriate position; (3) resetting the position of the base board; (4) acquiring a signal; (5) drawing an axis orbit; (6) determining the misalignment degree; (7) determining the misalignment type; (8) computing an adjusting amount in XZ; (9) computing the adjusting amount in XY; and (10) acquiring another point in an acquired signal and computing the adjusting amount. The dynamic detecting device has a beneficial effect of detecting the misalignment fault of rotating shafts with different shaft diameters.

A method for detecting the precision of a five-spindle machining center of a double-rotary table structure comprises the following steps: a movement curve of a five-spindle linked machine tool is designed, and a machine tool theoretical movement curve equation is obtained through the movement curve of the machine tool; a detection instrument is installed, the machine tool theoretical movement curve equation is converted into codes for driving the machine tool to move, the machine tool is controlled to operate, and the length change data of a ball bar is acquired during the movement process of the machine tool; an error model between the length change data of the ball bar and the error of the machine tool is obtained; according to the sampling data and the error model, twenty errors of the five-spindle machining center of the double-rotary table structure are calculated; and the assembly of the parts of the machine tool is adjusted through the twenty errors. After the method is adopted, the instrument is simple to install, debug and operate, the measurement time is shorter, devices are simple to use, and the detection cost is lowered.

A distributed fiber optic sensor simultaneously interrogates the sensing fiber with two counter propagating light beams. One beam is set to a constant frequency. The second beam is modified to contain a “comb” of frequencies, with each frequency component in the comb offset by a predetermined amount. Each of the frequency components in the comb, herein referred to as teeth, is able to interact with the counter-propagating beam through the Brillouin scattering process. With proper selection of the comb characteristics such as the number of teeth, the frequency spacing of teeth, the spectral width of teeth, and the relative amplitude of the teeth, a representation of the Brillouin spectrum at each point in the fiber can be obtained simultaneously with a single pass through the fiber.

The present invention belongs to the field of measurement technology, and relates to an improvement on calibration method for laser autocollimating angle-measuring system. It is characterized by that on the basis of laser autocollimating three-freedom dynamic angle measuring system said invention adopts the following steps: creating simplified calibration model of laser autocollimating angle measuring system, obtaining rating data pair, calibrating parameter of model and obtaining measurement model of system.