62results about How to "Fast measuring method" patented technology

The invention discloses a water area measurement method and system based on laser SLAM positioning, and belongs to the technical field of surveying and mapping. The method comprises the steps that: anunmanned ship carrying a laser radar, an inertial measurement unit IMU and a GPS receiver is used for measuring a water area and collecting data; stationary base initial alignment is carried out by utilizing acquired IMU and GPS data, and initial absolute position and attitude information is provided for subsequent laser SLAM calculation during advancing; point cloud preprocessing operation is carried out on data acquired by the laser radar according to a water area measurement environment; attitude transformation between two adjacent frames of point cloud is estimated by using the IMU, and an initial value is provide for point cloud registration; registration is performed on the point cloud by using a PPICP algorithm; integrated navigation pose information is added as an additional constraint to back-end graph optimization so as to improve solving precision; and according to the result of the back-end optimization, the three-dimensional coordinates of the point cloud are calculated,and a three-dimensional point cloud map is drawn, and the absolute position information of the boundary of the water area is marked. Accurate reference can be provided for overall protection and comprehensive treatment of the water area.

The invention discloses a method for quickly and sensitively detecting pesticide residues on surfaces of fruits and vegetables. With an ion mobility spectrometry technology as a basic detection technology, a quick qualitative and semi-quantitative analysis method for detecting pesticide residues based on an ion mobility spectrometry is established by a positive ion and negative ion mode. The method comprises the following steps: baking sampled sheets containing different pesticide samples for drying solvents, and then, conveying the sampled sheets into an ion mobility spectrometry thermal analysis sample injector to detect and analyze the sampled sheets to obtain detection signals, and performing qualitative and semi-quantitative analysis according to sample peak migration time and signal strength. Limit of detection of pesticide standard measurement can be less than 1ng. The measurement method is simple, convenient, quick, efficient and highly reliable, and can be widely used for analyzing pesticide residues on surfaces of fruits and vegetables in the food safety field.

The invention discloses a device for quickly measuring lamp space spectral distribution. The device comprises a frame body, a placing base of a lamp to be measured, an optical fiber bundle, an optical switch, a spectrometer and a data acquirer, wherein one end of each optical fiber of the optical fiber bundle is arranged on the frame body in a dot matrix mode and the other end of each optical fiber of the optical fiber bundle is connected with the input end of the optical switch; and the output end of the optical switch is connected with the spectrometer. The invention also provides a quickly measuring method. The device is implemented by an optical fiber light guide mode. Compared with the conventional and common mechanical rotation type optical parameter distribution measurement method, the method accords with the actual on-line measuring requirement, is quick in measurement, makes the system design flexible, can realize multi-angle quick measurement conveniently, and is particularly suitable for realizing on-line quick measurement of the production line. Space spectral distribution can be quickly acquired by shunt detection of the optical switch, so the functionality is high.

The invention discloses a method for measuring available bandwidth of a link and a path. The method for measuring the available bandwidth of the link comprises the steps of sending a detection flow at the rate Rs' and the rate Rs'' respectively through a sending end of a link, receiving the detection flow through a receiving end of the link and calculating the delay increase rate K' and the delay increase rate K'' of the detection flow on the link to obtain the available bandwidth A of the link. The method for measuring the available bandwidth of the path comprises the steps of sending a detection flow through a sending end of the path, receiving the detection flow through a receiving end of the path, measuring the nonzero delay increase rate K' and the nonzero delay increase rate K'' of the detection flow on the path when only one jam link exists in the path and obtaining the available bandwidth A of the path through calculation. A measurement error of the method is superior to a method for measuring the available bandwidth of a classic path, and the method for measuring the available bandwidth is quick and accurate, has good robustness and fills the blank in the prior art.

The invention discloses a rapid sensitive method for detection of the freshness of meat. The method uses an ion mobility spectrometry detection technology as the basic technology, and employs positive and / or negative ion mode for the establishment of an ion mobility spectrometry method for the rapid detection of the freshness of meat. Under the experimental conditions, the changes of released components and content variation of the same component in the spoilage process of meat can be monitored continuously. A detection device provided by the invention has the advanategs of high sensitivity, easy assembly, low cost, easy popularization, and suitability for on-site rapid detection and mass screening. The method can rapidly and sensitively detect freshness of meat and increase the efficiency and accuracy of food inspection and quarantine.

The present invention provides a polarization performance measurement method of a multifunctional lithium niobate integrated device. The extinction ratio of a waveguide chip, the coupling crosstalk of optical fibers and the distributed extinction ratios of a waveguide input end optical fiber and a waveguide output optical fiber are measured; a polarizer and an analyzer which have different polarization angles are adopted to measure a waveguide many times, so that the internal crosstalk data of the waveguide input and output end optical fiber are obtained; the energy distribution curve of the crosstalk data is calculated, so that the distributed extinction ratios of the optical fibers are obtained; an interference pattern carrying the extinction ratio of the chip and coupling crosstalk information is obtained through measurement; the extinction ratio and the crosstalk are measured through using interference peaks in the interference pattern which are in bilateral symmetry; whether the difference values of measurement results at a left end and a right end satisfy requirements is judged; and if the difference values are large, re-measurement is required until the results meet the requirements. According to the method, detected polarization crosstalk data are measured on the basis of the characteristics of high precision and wide dynamic range of white light interferometry, and therefore, the measurement results are accurate and reliable.

The present invention discloses a method for detecting NO and / or propofol in expiratory gas. According to the method, an ion mobility spectrometry technology is adopted as the basis, air is adopted as an air supply source of carrier gas and drift gas, and the NO content and the propofol content in expiratory gas can be simultaneously, sequentially or separately measured; and with application of the method to detect NO and / or propofol in expiratory gas, advantages of rapid detection, high sensitivity, direct measurement without pre-treatment, real-time online monitoring and the like are provided, wherein the detection limitations of the propofol and the NO respectively can achieve 0.5 ppb and 4 ppb.

The invention discloses a method for measuring freezing parameters of frozen meat; with utilization of difference of near infrared absorption and reflection spectra of different-particle-size and different-distribution ice crystals formed from moisture in a product in different temperatures and at different freezing rates, and through establishment of a chemometrics relationship model of the freezing parameters and the near infrared spectra, the method for rapidly measuring the freezing temperature and the freezing rate of the frozen product is realized. The method can rapidly, accurately and nondestructively measure the freezing temperature and rate, at the same time, breaks through conventional technical limitations that the freezing parameters of the product are required to be in the freezing process to be measured, and is applicable to monitoring and quality analysis of the freezing process of the frozen product.

The invention discloses a novel method which is capable of detecting citric acid fentanyl anaesthetic quickly and sensitively. The method takes ionic migration spectrometry technology as basic detection technology, a positive ion mode is adopted, and a qualitative and semi-quantitative analytical method for the citric acid fentanyl anaesthetic detected by the ionic migration spectrometry is created. Coupons containing different citric acid fentanyl anaesthetic samples are sent to be detected in a thermal desorption sample injector of an ionic migration spectrometry detector after solvent of the coupons is dried, detection signals are obtained, and a qualitative and semi-quantitative analysis is carried out. A sample measurement detection limit of the citric acid fentanyl anaesthetic can reach 50 parts per billion (ppb), a quantitative analysis range is between 1ng and 60 ng, a created standard curvilinear equation is that y is equal to 1.3451 plus 0.4044 x, and a correlation coefficient r is larger than 0.99. The detection method is simple, convenient to achieve, quick, high-efficient and good in reliability, and can be used for quick detection of the citric acid fentanyl anaesthetic in clinical diagnosis of a patient or on a crime scene.

The invention discloses a method for rapidly detecting inorganic oxidants in an inorganic explosive. The method is based on thermal desorption ion mobility spectrometry, and is characterized in that a sampling cloth is acidified by using an acidic substance, or acidifying pretreatment of an inorganic explosive solution is directly carried out by the acidic substance, or the inorganic explosive is carried into a migration tube by a carrying gas with a volatile acid as a doping agent, and nitrate, chlorate, perchlorate, nitrite and other inorganic oxidants can be directly measured. The method for measuring the inorganic oxidants in the inorganic explosive has the advantages of fast detection speed, high sensitivity and the like.

The invention discloses a qualitative and semi-quantitative analysis method for sample detection by an ion mobility spectrometry. An ion mobility spectrometry technology is used as the basic detection technology, and the ion mobility spectrometry in a positive ion mold and a negative ion mold is adopted to establish the qualitative and semi-quantitative analysis method to detect different samples. Self-configuration ion mobility spectrometry analysis software can automatically generate a standard curve, automatically input a standard curve equation and automatically alarm to display the quantity of the samples. According to the qualitative and semi-quantitative analysis method for sample detection by the ion mobility spectrometry, a citric acid fentanyl narcotic sample (FK) is used as an example, a standard curve equation y=1.3451+0.4044x is created in the range of 1-60 ng, and a correlation coefficient r is larger than 0.99. The qualitative and semi-quantitative analysis method is simple, quick and efficient and can be widely used in qualitative and semi-quantitative analysis for the sample detection by the ion mobility spectrometry.

The invention discloses a method for ultrasonically and synchronously measuring axial force and shearing force of a bolt. The method comprises the steps of 1, adhering piezoelectric wafers to two endsurfaces of a bolt to be measured; 2, calibrating an axial stress coefficient Kx and a radial stress coefficient Ky of the bolt; 3, obtaining the difference [delta]t1 which is equal to t1-t0x betweenthe time t1 in the service state and the time t0x in the axial zero stress; 4, calculating an axial force F1 which is equal to Kx*[delta] t1 according to the axial stress coefficient Kx; 5, obtainingthe difference [delta]t' which is equal to t'-t0 between the time t' under the service state and the time t0 under the zero stress; 6, obtaining the sound time difference [delta]t2 which is equal to [delta]t'-[delta]t1=(t'-t0)-(t1-t0x) caused by the shearing force of the bolt in the service state; and 7, according to the radial stress coefficient Ky, calculating the shearing force F2 which is equal to Ky*[delta]t2. By setting excitation and receiving directions and positions of different piezoelectric wafers, the axial force and the shearing force of the bolt to be measured in the service state are measured respectively, and the measurement precision of the bolt stress is improved; and the axial force and the shearing force can be measured simultaneously.

The invention discloses a rapid detection device and a detection method for track plate deformation. The device comprises a beam, a support sleeve, a telescopic leg, a tension spring, a fixing bolt, abracket, and a PSD laser system, wherein the telescopic leg is located in the support sleeve, and the lower end of the telescopic leg is exposed outside the support sleeve; the upper end of the support sleeve is fixedly connected with the lower end surface of the beam through the fixing bolt; the tension spring is arranged between the beam and the upper end of the telescopic leg; the upper end ofthe beam is provided with the bracket; the bracket is provided with the PSD laser system; the PSD laser system is wirelessly connected with a detection system. Compared with the prior art, the rapiddetection device and the detection method for the track plate deformation have the advantages that deformation detection is performed on a CRTS III type track plate, the accuracy is improved and the requirements on the field environment, personnel and equipment are reduced compared with the conventional on-site detection; the measurement method is rapider, more accurate and more cost effective than the existing measurement method.

The invention relates to designing of a circuit for microwave measurement of wood moisture content and discloses a fast, non-contact, nondestructive and high-precision circuit for microwave measurement of wood moisture content, belonging to the technical field of electronic science. The circuit is designed based on xx principles and comprises a microwave signal generation circuit part, a sensor measurement circuit part, a modulation microwave signal circuit part and a narrow-band filtering and amplification circuit part. The invention has the following advantages: microwaves can penetrate wood, and microwave measurement results reflect moisture content in the wood and are free of influence by factors like the color and the structure of the wood; and a final measured value of the circuit is calculated according to a standing-wave ratio and phase shift obtained through narrow-band filtering and amplification of a deamplification signal of electromagnetic waves and a measurement signal of a sensor, so the process of measurement is fast and precision and a measurement scope can be adjusted according to actual conditions. With such advantages, the circuit is applicable to real-time rapid on-line measurement of wood moisture content.

The invention discloses a hydrogen isotope crystallization height and surface roughness interference measurement device and method, and the device comprises an interference measurement system, a displacement system, and a computer processing module. The method comprises the following steps: in a microscopic observation mode, controlling a displacement system to scan and shoot a whole crystal growth surface, performing image splicing to obtain images of all regions, and determining an accurate position needing to be monitored; and aligning the observation field of view of the measurement systemwith a monitoring area, switching to an interference measurement mode, and realizing measurement of the growth height and the final growth state surface roughness of the area to be measured by usingan interferogram fringe phase measurement technology. By utilizing the device and the method provided by the invention, the non-contact measurement of the growth height and the surface roughness of the hydrogen isotope low-temperature crystal can be realized, the influence of vacuum chamber glass, strong reflection light of a growth substrate, boundary fracture in the growth process and the like on a common interference microscopic system is eliminated, and high-precision measurement is realized.

The invention discloses a method for improving blood sodium valproate detection sensitivity. The method utilizes ion mobility spectrometry as a basic detection technology, utilizes an ion mobility spectrometer as detection means and utilizes a negative ion high pressure mode, a thermo-desorption sample introduction method and a complex sample-free pre-treatment method. A device used in the method is stable and reliable. The method is simple, fast and efficient. Detection and analysis time of a single sample is less than 1min. The method has high detection sensitivity, a detection limit of 1mg / L and a quantitative analysis concentration scope of 10-200mg / L. The built qualitative and quantitative analysis method satisfies a human body clinical administration concentration analysis scope of 50-100mg / L of epilepsy patients. The detection method can be widely used for clinical administration deep analysis and provides guidance for clinical accurate administration by doctors.

The invention relates to the field of railways, and discloses a steel-rail detection device. The steel-rail detection device comprises a first observation pile, a distance measuring device and a control device, wherein the first observation pile is mounted a preset distance away from one side of a steel rail; the distance measuring device is used for measuring a present longitudinal distance between the first observation pile and one side of the steel rail; the control device is used for confirming the crawling amount according to the difference between an initial longitudinal distance between the first observation pile and one side of the steel rail and a present longitudinal distance between the first observation pile and one side of the steel rail.

The invention relates to a non-contact type fabric surface roughness test method and a non-contact type fabric surface roughness test device. The non-contact type fabric surface roughness test device comprises two rotating wheels fixed at both ends of a first wheel shaft, two rotating wheels fixed at both ends of a second wheel shaft, and frame plates which are fixed on the first wheel shaft and the second wheel shaft and form a rectangular frame with the first and second wheel shafts, wherein fabric encircles the first wheel shaft and the second wheel; a camera is arranged above the top end of the first wheel shaft; and a frame of image is photographed every time the first wheel shaft rotates by a certain degree. The non-contact type fabric surface roughness test device is simple in structure, and the implemented test method can achieve the requirement of measuring surface roughness accurately, stably and quickly.

The invention relates to a site testing method for a transformer winding deformation low-voltage impedance. The site testing method has the main technical key points of comprising a method of adopting a low-voltage impedance tester to test the low-voltage impedance of a high voltage to a middle voltage of a transformer at a high-voltage testing point, a method for testing the low-voltage impedance of the high voltage to a low voltage of the transformer at the high-voltage testing point and a method for testing the short-circuit impedance of the middle voltage to the low voltage of the transformer at a middle-voltage testing point. The site testing method for the transformer winding deformation low-voltage impedance is reasonable in design, and adopts a traditional low-voltage impedance to respectively test the low-voltage impedances of the high voltage to the middle voltage, the high voltage to the low voltage and the middle voltage to the low voltage, thus enabling the winding deformation test to be more close to the actual site operation; and a convenient, fast and reliable method is provided for the measuring of the low-voltage impedance of high and middle voltages of an oil sleeve cable transformer.

The invention discloses a method for measuring upward camber of the girder of a crane by utilizing laser. In the method, a laser self-leveling plumb aligner and a digital display light target are included. The method is as below: the plumb aligner is placed on the girder except the position of a measured point, and a level bubble is adjusted to be in the middle of a circular ring so as to achieve self-leveling; a laser power supply is switched on, and the plumb aligner is rotated to be aligned with the light target so that level reading can begin; firstly, zero setting of the light target is a first point reading, then, a second point is aligned with the light target for purpose of reading, and by parity of reasoning, the level reading of a digital display caliper is obtained and then recorded; and the upward camber value of the girder of the crane is calculated, and by recording a group of data, a special data processing system for the plumb aligner is used for drawing an upward camber curve of the girder. The measurement method is convenient, fast and highly accurate.

The invention provides a forklift gantry channel steel specific height inner width measuring tool and a measuring method thereof. The measuring tool comprises a first measuring block and a second measuring block. A first measuring plane is arranged on the first measuring block which is used for measuring the upper limit value of the forklift gantry channel steel specific height inner width. A second measuring plane is arranged on the second measuring block which is used for measuring the lower limit value of the forklift gantry channel steel specific height inner width. The first measuring plane and the second measuring plane are respectively aligned with a measured channel steel web. A measuring plate moves vertically to measured channel steel. By measuring the contact of a height positioning block on a measuring plane and the measured channel steel web or the contact of two side walls and the inner side of the measured channel steel flange, whether the forklift gantry channel steel specific height inner width is qualified is quickly determined. The measurement time is reduced. Measurement errors are reduced. The measurement accuracy and the production efficiency are improved.

The invention provides a thermal characteristic measuring method and system of an air conditioning system, a terminal and a storage medium. The air conditioning system comprises a water chilling unit, a coil pipe and a pipeline. The thermal characteristic measuring method comprises the following steps: acquiring each thermal characteristic initial parameter of the air conditioning system in real time, and acquiring the outlet water temperature of the water chilling unit according to the thermal characteristic initial parameters of the air conditioning system; acquiring the outlet water temperature of the pipeline according to the water outlet temperature of the water chilling unit; acquiring the air supply temperature of the coil pipe according to the outlet water temperature of the pipeline; and acquiring a thermal characteristic measuring result of the air conditioning system according to the outlet water temperature of the water chilling unit, the outlet water temperature of the pipeline and the air supply temperature of the coil pipe, wherein the thermal characteristic measuring result is a dynamic change process of conveying cold energy into a room by the air conditioning system after a refrigerator side control strategy is implemented. According to combination of measuring results of the water chilling unit, the coil pipe and the pipeline, compared with the prior art, the method has higher scene applicability and universality, and the measuring method is more effective and faster.

The invention discloses a three-point identifying arc measuring instrument and measuring method. The measuring method includes a main scale and two auxiliary scales, wherein one end of the main scale and one end of each auxiliary scale are connected through a central shaft respectively; and the other ends of the main scale and the two auxiliary scales are measuring heads; a main scale vernier is arranged on the main scale, and auxiliary scale verniers are arranged on the two auxiliary scales; and synchronous locking devices mutually matched are arranged on the main scale and the two auxiliary scales. The invention has the positive effects as follows: according to the theorem of three-point identifying center, an arc is measured by three measuring feet extending from an identical circle center and having the same length, and the three measuring feet having the same length are contacted with three arbitrary and un-coincident points on the same arc; and when the conditions are met, the length value of the measuring feet is the radius of the arc. The measuring instrument disclosed by the invention has a simple structure and is convenient to use; and the measuring method disclosed by the invention is simple, convenient and fast, and can read out the radius of the measured arc directly without calculations.

The invention discloses a measuring device for elasticity modulus of granular sludge, which is used for measuring the vertical deformation amount of the granular sludge under certain acting force. The invention further discloses a measuring method for the elasticity modulus of the granular sludge. The measuring method comprises the following steps: establishing a solid model of the granular sludge in ANSYS software, combining with the data measured by the measuring device, and utilizing the software to automatically analyze and solve so as to obtain the elasticity modulus of the granular sludge. The measuring device comprises a base and a fixed bracket, wherein the base is provided with an electronic scale for measuring the downward acting force of load of the granular sludge to be measured; a dial gauge for measuring the vertical deformation amount generated by the granular sludge to be measured is fixedly arranged right above the base by the fixed bracket; a measuring rod of the dial gauge is vertical to an object-carrying platform of the electronic scale, and a measuring head is upward; and a force-applying mechanism for applying the downward acting force on the measuring head is fixedly arranged above the measuring head by the fixed bracket. The measuring device and the measuring method have the advantages that the structure is simple, the cost is low, and the use is convenient, so that the application in sewage treatment can be wide.

The invention discloses a method for detecting element enrichment on the surface of a plate steel base material, which comprises the following steps of detecting the content of alloy elements in the plate steel base material by using a glow spectrometer, and dissolving and removing a plating on the surface of a plate sample by using a chemical reagent before detection. The obtained enrichment rule of elements such as silicon and manganese on the surface of the steel base material of the galvanized / aluminized / galvanized aluminum-magnesium plate can reflect the enrichment state of elements such as silicon and manganese on the surface of the base material before the galvanized / aluminized / galvanized aluminum-magnesium plate is galvanized, the measurement method is simple, convenient and rapid, and the measured numerical value is accurate.