28 results about "TRACER" patented technology

The invention discloses a solid propellant high-pressure combustion flow field testing device and method based on a particle image velocity measurement technology. The solid propellant high-pressure combustion flow field testing device comprises a visual high-pressure combustion chamber, a solid propellant placement platform, an ignition system, a smoke purging and filtering system, a double-frame high-frequency shooting system and a high-frequency laser system. AlO particles generated by combustion of a solid propellant are used as tracer particles, so that the problem that the tracer particles are difficult to accurately inject in a combustion flow field in a high-pressure environment is solved; strong background radiation caused by combustion of the solid propellant is filtered through a narrow-band filter, and a movement track image of the tracer particles is obtained; by using the smoke purging and filtering system, the removal of AlOparticles during combustion of the solid propellant is realized, and the influence on the observation view and the sheet light source is avoided. The device is convenient to adjust, good in repeatability, low in manufacturing cost and convenient to disassemble and maintain, has high engineering applicability and experiment reliability, and can be suitable for any aluminum-containing solid propellant high-pressure combustion flow field testing experiment.

The invention relates to a radioisotope tracer strain clamp cavity grease injection amount detection system and method, and provides a method for preparing electric grease containing a low-energy gamma-ray isotope tracer agent, injecting the electric grease into a strain clamp cavity, sealing, scanning in a lead shielding detection cabin by using a high-resolution sodium iodine detector, and detecting the grease injection amount of the strain clamp cavity. And the grease thickness of each area is calculated according to the Lambert-Beer law, and the total grease injection amount is obtained through accumulation. According to the method, non-contact measurement is adopted, the detection sensitivity reaches 0.01 ml, the method is suitable for detecting small-size cavities and is particularly suitable for complex shapes such as deep holes and narrow slits, and the problem of low resolution in the prior art is solved; in addition, the radiation dose in the detection process is lower than 0.1 mu Sv, safety is ensured, the quality control risk is reduced, and the maintenance reliability of the power system is improved.

Method for controlling the drift of a leak detector and associated equipment. The invention relates to a method for controlling the drift of measurements of a leak detector (1) of a tracer gas in a piece of equipment (100), capable of performing a leak test cycle on a part to be tested (A) placed in a measuring chamber (101). The method comprises the following steps: injection of the tracer gas with a predefined concentration value into a pipe communicating with the leak detector (1); the leak detector (1) measures an internal concentration of the tracer gas; comparison of the measured value with the predefined concentration value; in case of a difference, determination of a correction factor; and application of the correction factor to the measured value of the tracer gas concentration in the measuring chamber (101) during said test cycle. The invention also relates to the equipment (100) for implementing said method. Figure for the abstract: Fig.1 .

This invention provides a deep learning-based method for cavitation flow synchrotron radiation particle image velocimetry, comprising: capturing high spatiotemporal resolution cavitation X-ray images containing tracer particles using synchrotron radiation pulsed X-ray rapid imaging technology; improving the YOLOv5 target detection model by adding a small target detection module and a CBAM attention mechanism module; performing super-resolution preprocessing on the cavitation X-ray images using a diffusion model and segmenting the preprocessed images into four equal parts; training the improved YOLOv5 target detection model using a dataset; predicting tracer particles in the segmented images using the trained YOLOv5 target detection model to generate cavitation tracer particle images; and applying cross-correlation analysis to the cavitation tracer particle images to calculate the instantaneous velocity vector field of cavitation. This method solves the detection challenges of large numbers of small tracer particles, significant overlap between particles, and some particles being obscured by bubbles.

A method for evaluating induced fractures in a wellbore includes obtaining a first set of data in a wellbore using a downhole tool. The method also includes pumping a first proppant into the wellbore after the first set of data is obtained. The first proppant includes a first tracer that is not radioactive. The method also includes pumping a second proppant into the wellbore. The second proppant includes a second tracer that is not radioactive. The second tracer is different than the first tracer. The first proppant and the second proppant flow into fractures in the wellbore. The method also includes obtaining a second set of data in the wellbore using the downhole tool after the first and second proppants are pumped into the wellbore. The method also includes comparing the first and second sets of data.

The embodiment of the utility model relates to a tracer assembly. The tracer assembly comprises a tracer and a positioning plate. According to the tracer assembly provided by the invention, the tracer and the positioning plate are combined for use, and the light reflecting part is used for generating the image under the irradiation of the infrared light, so that the image receiving equipment obtains the position information of the tracer; the metal ball body is used for generating an image under X-ray irradiation so that an image receiving device can acquire position information of the positioning plate. Therefore, the position information of the tracer and the position information of the positioning plate can be obtained in different modes at the same time, the accurate position of the tracer assembly can be obtained by verifying the position information of the tracer and the position information of the positioning plate, the algorithm fault tolerance is greatly improved, and the possibility that the tracer assembly feeds back the wrong position in actual application is effectively reduced.

The application discloses a radioactive separation laboratory environment radiation field dynamic modeling method and system, and belongs to the field of chemical process modeling. Step 1, the concentration distribution of a non-radioactive process tracer physically associated with a target radionuclide in a process fluid is obtained; step 2, based on the concentration distribution and the macroscopic residence time distribution of the material, the pre-judgment source term of the radionuclide is obtained through time translation and decay scaling; step 3, the radiation field observation waveform collected by a heterogeneous radiation sensitive field sensor network and independent of the pre-judgment source term is obtained; step 4, the theoretical radiation field change waveform calculated based on the pre-judgment source term is obtained; the application can obtain the concentration distribution of the non-radioactive tracer physically associated with the target radionuclide, eliminate the inherent bias of the source term from the source, and accurately depict the time-varying characteristics of the source term caused by the continuous migration of the material without making steady-state or quasi-static simplification assumptions on fluid turbulence, two-phase interface dynamic change and other processes.

The invention relates to the technical field of dam monitoring, in particular to a dam concrete panel joint leakage multi-tracer monitoring device and method, and the device comprises a tracing assembly and a detection assembly. The tracing assembly comprises a soluble shell, and the shell is pre-embedded in the seam position; the inner cavity of the shell is filled with a tracer agent; when water seepage occurs at the joint position, the shell is dissolved by the seepage water; the detection assembly comprises a cabinet, an acquisition module and a detection module are arranged in the cabinet, and the acquisition module and the detection module are electrically connected with a data processing and transmission module arranged in the cabinet; the detection module processes the collected water source, so that the tracer in the water source emits light and detects light data, and the data processing and transmission module judges whether the joint has water seepage or not according to a detection result. According to different pre-embedding positions of the adopted various tracers and the received excitation wave band and spectral intensity, which joint leaks can be accurately judged, and leakage monitoring of the concrete panel joint is realized.

This invention discloses a method for preparing non-radioactive tracer ceramsite with a stable signal-to-noise ratio, and designs a gamma capture value ζ per unit volume of tracer ceramsite green body. o The acquisition method establishes a ζ o This method, based on real-time online control of tracer element content in tracer ceramsite, eliminates the phenomenon of excessively low or high tracer element content caused by uneven mixing or other factors during tracer ceramsite production, precisely controlling the tracer element content within a set threshold. Based on downhole measured data... 测 Feedback is provided to adjust the set threshold ζ of the tracer ceramsite in real time. 阈 The wellbore and downhole linkage can achieve a stable signal-to-noise ratio when monitoring fracturing information using tracer ceramsite neutron-activated transient gamma ray method in complex fracturing environments. It can avoid the fluctuations in the captured gamma signal during fracturing fracture logging due to different logging tool parameters, wellbore environment and oil and gas reservoir, thereby improving the logging success rate.

The invention discloses a radioactive separation laboratory environment radiation field dynamic modeling method and system, and belongs to the field of chemical process modeling, and the method comprises the steps: 1, obtaining the concentration distribution of a non-radioactive process tracer agent which is in a physical associated relationship with a target radionuclide in a process fluid; step 2, based on the concentration distribution and the macroscopic retention time distribution of the material, obtaining a prejudgment source item of the radionuclide through time translation and scaling according to decay; step 3, acquiring a radiation field observation waveform which is acquired by the heterogeneous radiation sensitive field sensor network and is independent of the pre-judgment source item; 4, changing the waveform of the theoretical radiation field calculated based on the pre-judgment source item; according to the method, the non-radioactive tracer physically associated with the target radionuclide can be adopted to obtain the concentration distribution, steady-state or quasi-static simplified assumption does not need to be made in the processes of fluid turbulence, two-phase interface dynamic change and the like, the inherent deviation of the source item is eliminated from the source, and the time-varying characteristic of the source item caused by continuous migration of the material is accurately described.

The invention discloses a multi-reactant catalytic intermediate tracing and kinetic decoupling method. The method comprises the following steps: building a multi-reactant phase sensitive detection in-situ infrared online test system; designing concentration change modes of different periods for each reactant; after detection is started, the concentrations of all reactants are periodically changed, infrared spectrum data at all sampling time points are collected, and the concentrations of the reactants are calculated; performing time-dependent to phase-dependent conversion on the detection result to obtain a concentration conversion result and an absorbance conversion result of each reactant; determining the characteristic wave numbers of a plurality of candidate intermediates and main reaction products, extracting phase-dependent absorbance from the absorbance conversion results of the reactants according to the characteristic wave numbers, and calculating the maximum intensity of the phase-dependent absorbance and the phase difference between the phase-dependent absorbance and the concentration conversion results of the corresponding reactants to obtain the calculation results of the candidate intermediates and the main reaction products; and analyzing an intermediate source, main and side reaction decoupling and an intermediate generation sequence. The method can make up the key defects in the research of a multi-reactant interface catalytic mechanism.

This invention discloses a chemical weather model forecasting method and system based on atmosphere-chemistry bidirectional coupling. The method includes full-process variable registration, writing grid pointer variables to obtain grid static ground data, extracting key physical parameters, calculating the dynamic transport of the tracer array in the main integration program and transmitting it to the CHEM driver, calling the CHEM driver in the main integration program, and simultaneously transmitting the CMAMeso meteorological field, the tracer array, the physical parameters, and the grid static ground data to CUACE for atmospheric chemical process calculation. The atmospheric chemical process calculation results are then transmitted back to the main integration program to achieve online atmosphere-chemistry coupling. The method establishes real-time calculation of key aerosol radiation parameters, performs real-time cloud droplet activation to obtain cloud droplet number and concentration, establishes an aerosol-cloud interaction mechanism to output cloud parameters, updates the radiation transport scheme, and performs numerical forecasts of environmental meteorological and weather elements. This method can improve the accuracy of chemical weather model forecasts and also has good physical interpretability.

The application provides a kind of method and system for dissimilar metal molten pool flow visualization based on synchrotron radiation.The method comprises preparing dissimilar metal sample;Clamping dissimilar metal sample in sample clamping table, adjusting the X-ray incident direction of synchrotron imaging device to penetrate dissimilar metal sample;Irradiate dissimilar metal sample with laser;Transmitting imaging of mixed molten pool is carried out using synchrotron radiation source, and a sequence of transmission imaging is obtained;The transmission imaging sequence is analyzed to obtain the dynamic migration and flow pattern image information and data of the metal in the mixed molten pool.The method does not need to introduce tracer particles or bubbles, and does not change the intrinsic flow of the molten pool;The imaging contrast is high, the space-time resolution is high, the real and repeatable molten pool internal flow field information can be obtained, and it is suitable for the molten pool dynamics research and mechanism analysis in the process of laser welding and additive manufacturing, to provide reliable data support for molten pool flow model verification and process optimization.

The present disclosure is directed to methods for evaluating a gravel pack, a frac-pack, or cement in a wellbore. In at least one embodiment, a method for evaluating a gravel pack, frac-pack or cement in a wellbore, includes pumping a first material into the wellbore, wherein the first material comprises a first tracer that is not radioactive. The method includes pumping a second material into the wellbore, wherein the second material comprises a second tracer that is not radioactive. The method includes obtaining a set of data using the downhole tool in the wellbore after the first and second materials are pumped into the wellbore. The method includes obtaining a baseline using the downhole tool in the wellbore in a depth interval without the first or second material. The method includes comparing the set of data with the baseline.

The application discloses a kind of high-temperature molten salt mass measurement methods, by continuously cumulatively in molten salt base salt join certain known mass of same molten salt as element tracer, and by ICP-MS to each molten salt base salt element tracer is monitored concentration.By calculating the ratio of the added element tracer mass and the concentration measured, the total mass of the initial molten salt base salt is calculated.The advantages of the present application are: first, the element tracking method is first proposed to measure the total mass of high-temperature molten salt;Second, the measurement method of the present application can measure the mass of high-temperature molten salt in extremely harsh environment, such as measuring the mass of molten salt in high radiation environment;Third, the measurement method can measure the mass of high-temperature molten salt with unknown density in irregular container.

The invention relates to a method for monitoring the drift of measurements of a leak detector (1) of a tracer gas of a piece of equipment (100), capable of implementing a cycle for testing the tightness of a part to be tested (A) placed in a measurement chamber (101). The method comprises the following steps: injecting tracer gas with a predefined concentration value into a pipe communicating with the detector, the detector reading an internal concentration of tracer gas, comparing the read value with the predefined concentration value and, if they are different, determining a correction coefficient, and applying the correction coefficient to the measured value of the tracer gas concentration in the chamber during the test cycle. The invention also relates to the equipment used to carry out the method.

The invention discloses a chemical weather mode forecasting method and system based on atmosphere-chemical bidirectional coupling, and the method comprises the steps: carrying out the whole-course variable registration, writing in a grid pointer variable to obtain grid static ground data, extracting key physical parameters, calculating the power of a tracker array in a main integral program, transmitting the power to a CHEM driver, calling the CHEM driver in the main integral program, and carrying out the calculation of the power of the tracker array in the main integral program. Meanwhile, a CMAMeso meteorological field, the tracker array, the physical parameters and the grid static ground data are transmitted to CUACE for atmospheric chemical process calculation, and an atmospheric chemical process calculation result is transmitted back to the main integral program to realize atmospheric-chemical online coupling; the method comprises the steps of establishing aerosol key radiation parameter real-time calculation, performing cloud droplet real-time activation to obtain cloud droplet number concentration, establishing an aerosol-cloud interaction mechanism to output cloud layer parameters, updating a radiation transmission scheme, and performing numerical forecasting of environmental meteorology and weather elements. And meanwhile, the method has good physical interpretability.

The application discloses a small celestial body excitation sampling and air-blow sampling vacuum experimental verification system, a PIV flow velocity measuring system is arranged outside a to-be-measured pipe section of a sampling pipeline, flow field characteristic experimental verification is carried out by measuring the flow velocity of tracer particles in the sampling pipeline, a high-speed photography system is arranged outside the to-be-measured pipe section of the sampling pipeline, particle characteristic experimental verification is carried out by measuring the flow velocity of simulated asteroid particles, a signal acquisition system is used for synchronously measuring the gas pressure of all measuring points of the to-be-measured pipe section of the sampling pipeline and real-time monitoring of the vacuum degree in a vacuum cabin, and a control system is used for controlling the working time sequence of each system. The application can carry out gas excitation sampling and air-blow sampling verification under the ground gravity vacuum environment, and the flow velocity and distribution of the flow field can be measured.

One variation of a method includes, during execution of a tracer test: triggering release of a tracer load into air in an aerosol zone by a dispenser transiently arranged in the aerosol zone, the tracer load including a concentration of aerosol tracers; and recording a timeseries of aerosol data via a sensor unit transiently arranged in the aerosol zone, the timeseries of aerosol data representing concentrations of aerosol particles present in air. The method further includes: based on the timeseries of aerosol data and the concentration, deriving a tracer concentration curve representing change in concentration of aerosol tracer particles; based on characteristics of the tracer concentration curve, deriving an airflow value representing removal of aerosol particles from the aerosol zone during the tracer test; and interpreting an outcome for the tracer test based on a difference between the airflow value and a target airflow value defined for the aerosol zone.

A method of using a tracer in a wellbore that includes disposing the tracer into the wellbore so that the tracer comes into contact with a target formation. Upon contacting the target formation for an amount of time, returning a remnant fluid that includes at least a portion of the tracer to a surface for testing. The tracer has a first composition, and in its original state is a solid non-magnetic powder.

This document describes the technology and system for a modified ray tracker used in an electromagnetic response simulator. Electromagnetic ray information, including the starting point and direction, is received. By transforming the electromagnetic ray information from the global coordinate system of the environment to the local coordinate system of the potential target, the potential target to be hit by the electromagnetic ray can be determined. If it is calculated that the surface of the potential target is hit by the ray, then the potential target has been hit by the electromagnetic ray. The calculations performed in the local coordinate system of the potential target include simplified large-element physical optics formulas for parallel rays. If it is determined that the surface of the potential target has been hit, the electromagnetic response associated with the potential target can be calculated. In this way, an efficient and accurate electromagnetic response model can be approximated.

The application provides a high-temperature gas-solid interface chemical reaction zone positioning and distinguishing method, which comprises the following steps: first, using a radiation spectrum acquisition system to measure the radiation spectrum of a gas-solid interface of a heatproof material, and obtaining the radiation spectrum information of the chemical reaction zone of the gas-solid interface of the heatproof material; then, according to the measured radiation spectrum information, analyzing the chemical composition and corresponding wavelength of the chemical reaction zone on the surface of the heatproof material, so as to determine the tracer component for chemical reaction zone positioning; then, selecting the tracer component filter of the corresponding wavelength according to the analysis result of the radiation spectrum information, and shooting the radiation image of the chemical reaction zone of the heatproof material by using a high-speed camera provided with the tracer component filter; finally, realizing the positioning and real-time distinguishing of the interface chemical reaction zone between the high-enthalpy flow and the material surface according to the shot radiation image. The application can realize the positioning and real-time distinguishing of the interface chemical reaction zone between the high-enthalpy flow and the material surface, and solves the problem that the positioning of the interface chemical reaction zone between the high-enthalpy flow and the material surface is not clear at present.

This document describes techniques and systems for a modified ray tracker for an electromagnetic response simulator. Electromagnetic ray information is received, including a starting point and a direction. By converting the electromagnetic radiation information from a global coordinate system of the environment to a local coordinate system of the potential target, the potential target to be hit by the electromagnetic radiation can be determined. If it is calculated that the surface of the potential target is hit by the ray, the potential target is hit by the electromagnetic ray. The calculations performed in the local coordinate system of the potential target include a simplified large element physical optical formula of parallel rays. If it is determined that the face of the potential target is hit, an electromagnetic response associated with the potential target may be calculated. In this way, an efficient and accurate electromagnetic response model can be approximated.

This application relates to the measurement of in-well fracturing parameters using radioactive tracers, specifically to a tracer detection device and method. The detection device includes a radiation detector and a gyroscope. The radiation detector comprises a housing and multiple detection crystals. The housing is configured to form a chamber, and the multiple detection crystals are disposed within the chamber. At least two detection crystals are positioned facing different circumferential directions of the housing to detect radiation emitted by the tracer in different circumferential directions within the well. The gyroscope is used to determine the orientation of each detection crystal within the well. The detection device provided in this application, by changing the arrangement of the detection crystals so that at least two detection crystals face different circumferential directions of the housing, enables the detection crystals to detect radiation emitted by the tracer in different circumferential directions, thereby determining the distribution of the tracer in different circumferential directions within the well.

The invention relates to a quantitative analysis method for isotope content in double tracers, belongs to the technical field of isotope content analysis and testing, solves the technical problem that the isotope content in the double tracers cannot be measured, and comprises the following steps: calibrating the abundance ratio of an isotope diluent and the addition amount of the isotope diluent; mixing the isotope diluent with a to-be-detected sample; measuring the abundance ratio of the diluted mixture; solving the number of atoms of an isotope B and an isotope E from the tracer agent 1; and obtaining the number of atoms of the isotope B and isotope E derived from the tracer 2. The method is used for measuring the content of isotope B and isotope E from different tracers in a mixture of an original sample and double tracers.

The invention relates to the technical field of salt lake leakage, and discloses a lithium isotope-based salt lake leakage tracing method, which comprises the following steps of S1, screening tracers according to a standard; s2, comparing an inductively coupled ion mass spectrometer, an isotope ratio mass spectrometer, an X-ray fluorescence spectrum analyzer and an atomic absorption spectrometer, and selecting instruments; s3, an injection well is formed in the salt lake detection area, and a plurality of detection wells are formed along the periphery of the injection well; s4, a tracer agent is put into the injection well, sampling detection and data analysis are conducted on the detection well, and a seepage path is determined. According to the method, optimal tracers are injected into injection wells, then sampling is carried out in related benefited wells, and the arrival time of the tracers is analyzed based on the difference of the permeability of the salt lake layer in all directions on the plane; the water flow direction of the injection well can be determined, so that the flow direction of the water flow injected into the salt lake in each direction of the plane can be mastered.

A method for evaluating induced fractures in a wellbore includes obtaining a first set of data in a wellbore using a downhole logging tool. A first proppant is pumped into the wellbore, after the first set of data is captured. The first proppant includes a first tracer that is not radioactive. A second proppant is also pumped into the wellbore, after the first proppant is pumped into the wellbore. The second proppant includes a second tracer that is not radioactive, and the second tracer is different than the first tracer. A second set of data is obtained in the wellbore using the downhole tool after the first and second proppants are pumped into the wellbore. The first and second sets of data are compared.