41results about How to "Measurement method science" patented technology

The invention discloses a simple instant operating condition tail gas detecting device for gasoline motor car and its detecting method. The device includes a primary computer, driver assistant device, printer, bottom plate power measuring device and tail gas quality analyzing system, it uses ASM series of bottom plate power measuring device of German MAHA corporation and VMAS car tail gas quality analyzing system of American Sensors corporation, the system includes gas analyzing device, flux gauge and motor tachometer. The primary computer stores the operation series of the tail gas detection, which orders the driver assistant device to execute the tail gas detecting step in instant operating condition, and outputs the detected result to the printer. The method is more scientific, and it is very effective.

The invention relates to an experimental device and method for measuring the surface coefficient of heat transfer of supercritical carbon dioxide. The experimental device comprises a supercritical carbon dioxide circulating system and an injected water circulating system, wherein the supercritical carbon dioxide circulating system is provided with a measuring pipeline segment inner pipe, the injected water circulating system is provided with a measuring pipeline segment outer pipe, and the measuring pipeline segment inner pipe is embedded in the measuring pipeline segment outer pipe; water flows in an annulus between the measuring pipeline segment outer pipe and the measuring pipeline segment inner pipe; the supercritical carbon dioxide circulating system provides a circulating loop closed at high temperature and high pressure for carbon dioxide; the heat exchange of supercritical carbon dioxide in the measuring pipeline segment inner pipe can be realized through the injected water circulating system. The measurement on the surface coefficient of heat transfer of supercritical carbon dioxide within larger pressure and temperature range can be realized so as to obtain the surface coefficient of heat transfer of supercritical carbon dioxide under the conditions of different temperatures and pressures; the experimental device and method are simple in equipment, convenient to operate, and high in feasibility; the measurement method is scientific, and high-precision parameter measurement can be realized.

The invention belongs to the technical field of unconventional oil and gas production, and particularly relates to a device and a method for measuring the rheological property of a supercritical carbon dioxide fracturing fluid. The measurement device comprises a supercritical carbon dioxide pressurization system, a thickening agent injecting and mixing system and a supercritical carbon dioxide fracturing fluid circulating system, wherein the supercritical carbon dioxide fracturing fluid circulating system provides power required by closed circulation of the supercritical carbon dioxide fracturing fluid, and adopts a circulation loop which is closed at the high temperature and high pressure; the supercritical carbon dioxide pressurization system provides testing pressure required by carbon dioxide; and the thickening agent injecting and mixing system pumps a thickening agent into a high-temperature and high-pressure supercritical carbon dioxide pipeline. According to the device and the method for measuring the rheological property of the supercritical carbon dioxide fracturing fluid, the rheological parameter of the supercritical carbon dioxide fracturing fluid in larger pressure and temperature ranges can be measured, and the constitutive relation of the rheological property of the supercritical carbon dioxide fracturing fluid at different temperature and pressure can be obtained; the device is simple to operate, the method is easy to implement, and the feasibility is high; and measurement device is scientific, and higher-precision parameter measurement can be realized.

The invention belongs to the petroleum engineering field, and particularly relates to a device and a method for simulating abyssal region underwater oil spillage. The device for simulating the abyssal region underwater oil spillage comprises a pressure control system, a mixing injection system, an experimental model system and a water supply and drainage system, wherein the pressure control system supplies pressure for the experimental model system and the mixing injection system, the mixing injection system injects a mixture formed by mixing methane gas and crude oil according to a certain proportion into the experimental model system, the experimental model system supplies a high pressure and low temperature abyssal environment for an experiment, and the water supply and drainage system supplies a low temperature water source for the experiment and discharges sewage after the experiment is finished. The device and the method for simulating the abyssal region underwater oil spillage can simulate the abyssal oil spillage experiments under different pressure, different temperature and different jet velocity conditions and the like, provide accurate model parameters and effective data for an abyssal oil spillage model, and can confirm accuracy of the abyssal oil spillage model and simulate oil gas behavior fate under the abyssal environment. The device for simulating the abyssal region underwater oil spillage is simple to operate, and the method for simulating the abyssal region underwater oil spillage is easy to implement and high in feasibility. A measurement method used in the method for simulating the abyssal region underwater oil spillage is scientific, and can achieve high accuracy parameter measurement.

The invention relates to an experimental apparatus and a method for constant-pressure specific heat measurement of supercritical carbon dioxide. The experiment apparatus for the constant-pressure specific heat measurement of supercritical carbon dioxide comprises a supercritical carbon dioxide circulating system and an injection water cycling system, wherein the supercritical carbon dioxide circulating system comprises a measurement pipeline section inner tube; the injection water cycling system comprises a measurement pipeline section outer tube; water flows between the measurement pipeline section outer tube and the measurement pipeline section inner tube; the supercritical carbon dioxide circulating system provides a closed circulation loop at a high temperature and a high pressure for carbon dioxide; and the injection water cycling system realizes heat exchange of supercritical carbon dioxide in the measurement pipeline section inner tube. The experimental apparatus and method can realize the constant-pressure specific heat measurement of supercritical carbon dioxide in relatively large pressure and temperature ranges; and the constant-pressure specific heat of supercritical carbon dioxide at different temperatures and pressures can be obtained. The apparatus is simple; operations are convenient and feasibility is high. A measurement method is scientific and can realize relatively high precision parameter measurement.

The invention discloses a gas-liquid two-phase flux measurement method and a gas-liquid two-phase flux measurement device of natural gas and condensate gas or water. The gas-liquid two-phase flux measurement device of the natural gas and the condensate gas or water comprises a U-shaped pipe, a needle valve, a temperature transducer and a pressure transducer, wherein a conversed U-shaped pipe is arranged behind the U-shaped pipe, a first flowing rectifier and a first Venturi tube are installed on the conversed U-shaped pipe, a first differential pressure transducer is installed on the first Venturi tube, a second flow rectifier and a second Venturi tube are installed behind the conversed U-shaped pipe, the temperature transducer, the pressure transducer, the first differential pressure transducer and the second differential pressure transducer are respectively connected with a single chip computer which collects information sent by all parts, then calculates flux of the natural gas and condensate oil or condensate water, and is finally communicated with a remote data platform through a wireless data transmission module. The gas-liquid two-phase flux measurement method and the gas-liquid two-phase flux measurement device of the natural gas and the condensate gas or water has the advantages of being capable of effectively solving the problem of measuring the flux of the natural gas mixed by the condensate oil, reasonable and scientific in measurement method, reliable in measurement device and high in measurement accuracy.

The invention discloses a seven-hole probe airflow field wind speed and direction measuring method and device, and belongs to the field of airflow field testing, and the method comprises the steps: obtaining the instantaneous pressure values of seven holes outputted by a seven-hole probe; determining the subarea of the seven-hole probe corresponding to the incoming flow of the airflow field, and obtaining a pitch angle, an azimuth angle, and a total pressure coefficient and a static pressure coefficient related to the wind speed according to the instantaneous pressure value of each hole and the calibration coefficient corresponding to the subarea; obtaining a wind direction angle according to the pitch angle and the azimuth angle, and obtaining the wind speed of the airflow field accordingto the total pressure coefficient and static pressure coefficient related to wind speed. The seven-hole probe airflow field wind speed and direction measuring method and device can be used for efficiently, quickly and accurately measuring the wind speed and direction of the airflow field, standardizing the measurement process, improving the working efficiency and reducing uncertainty influence factors.

The invention discloses a method for measuring the content of heavy metals in edible mushrooms by ICP-AES (inductively coupled plasma-atomic emission spectrometry), and mainly solves the technical problems that the specific contents of pesticide residues and overproof heavy metals in the edible mushrooms cannot be measured. The method is implemented by the following steps: 1, preparing an experimental material; and 2, pre-treating a sample, preparing a standard solution, measuring working parameters of an instrument, constructing a standard curve and measuring the sample, wherein under the conditions, by adoption of the ICP-AES method, the content of the heavy metals in a mushroom solution is measured; each sample is measured for three times in parallel, and then an average value is calculated; and the contents of all elements in the edible mushrooms can be obtained by carrying out unit conversion on measured data. The measurement method is scientific, accurate, high in measurement precision, quick in measurement and wide in linear range and has the advantages of measuring various elements simultaneously and the like. By the method for measuring harmful substances, poisonous and harmful edible mushrooms can be prevented from entering the market, and the development of an edible mushroom cultivation technology is promoted; and therefore, the method disclosed by the invention has a good popularization prospect.

The invention relates to a device for evaluating natural gas hydrate phase state stability by a drilling fluid additive and an experimental method, and belongs to the technical field of natural gas hydrate development. The device comprises a gas injection system, a liquid injection system, a vacuumizing system, a natural gas hydrate simulation reservoir system, a reservoir permeability measurementsystem, a drilling fluid circulation system, a natural gas hydrate simulation reservoir temperature and pressure monitoring system and a reaction kettle temperature control system. Real horizontal well drilling working conditions can be simulated, real-time measurement of the influence range of the drilling fluid additive in a natural gas hydrate reservoir is achieved, and dynamic distribution ofa natural gas hydrate decomposition interface and the hydrate decomposition rate in the reservoir can be obtained.

The invention discloses an automatic blood pressure measurement method based on deep learning. The automatic blood pressure measurement method includes the steps: firstly, acquiring and segmenting audio data, and framing the audio data by segmentation; secondly, classifying voice data by a deep learning method, and recombining classification results according to a segmenting sequence; finally, mapping blood pressure values and transforming the classification results into the blood pressure values. Blood pressure value measurement is simplified into a classification problem, and the acquired audio data of a stethoscope are classified by the most widely applied deep learning method to judge whether signals in the data of the stethoscope are offset voice signals or not. The automatic blood pressure measurement method is scientific, and measurement results are accurate and reliable.

The invention relates to the field of measurement of plant transpiration water consumption, and discloses a portable tree transpiration measuring device and a tree transpiration measuring method. The portable tree transpiration measuring device comprises a transparent horizontal cylindrical leaf chamber box, wherein an air-tight door is arranged on one side of the leaf chamber box, a horizontal isolation net is arranged in the leaf chamber box, a humidity sensor and a temperature sensor which extend into the box are arranged above the leaf chamber box, the humidity sensor and the temperature sensor are respectively connected with a data processor through data wires, and the data processor is used for acquiring humidity and temperature data in the box in real time and calculating and outputting tree transpiration measuring data. The measuring principle is scientific, the measuring method is simple and the equipment investment is low.

The invention discloses a system and a method for measuring thermophysical properties of a phase change material. The system comprises a phase-change material container filled with the phase-change material to be measured, a water circulation system, a heating control system and a data acquisition control device, wherein the heating control system is used for heating or cooling the phase-change material container through using the water circulation system so as to change the state of the phase-change material, and the data acquisition control device is used for calculating the thermophysical properties of the phase-change material. The system and the method solve the problems that a system or a method capable of completely measuring the thermophysical properties does not exist in the priorart, accurate data cannot be provided for engineering application since the measurement result error is large due to the fact that phase-change materials are mixed unevenly and the measurement cost is high.

The invention discloses a lithium ion battery DCR test result correction method, which comprises the following steps of: adjusting the temperature of a constant temperature box, and placing batteries in it for the same time; acquiring a temperature value of each adjustment, a last voltage value before the corresponding DCR test, a test tail end voltage value and a charge and discharge current value data of each tested battery, and calculating to obtain the 'temperature and DCR' data of all groups, wherein a linear relation of fitting the DCR and the temperature is DCR correction=DCR actual*(a+bT-cT2); and collecting the temperature of the cell bodies before the DCR test and uploading the temperature to an upper computer program of the DCR by means of a sensor to obtain the corrected DCR. According to the lithium ion battery DCR test result correction method, the linear relation of fitting the DCR and the temperature is obtained through a design experiment, the temperature of the cell bodies is detected through the high-precision infrared temperature sensor, and the detected temperature data and the obtained fitting relation are combined with a data processing system of DCR test equipment, so that the DCR is corrected, and the accuracy is improved.

The invention discloses an online measurement method and device for the flow of three phases including crude oil, natural gas and water. According to the method, firstly, a three-phase mixture fluid of the crude oil, natural gas and water is heated to demanded temperature, the heat quantity is calculated, and the average specific heat and phase ratio of the three-phase mixture fluid are obtained.A Venturi tube in an inversely U-shaped pipe is used for measuring the average density of the three-phase mixture; a horizontal Venturi tube is used for measuring the total volume flow of the three-phase mixture fluid. Through combined calculation of the density, phase ratio and total volume flow of the mixture, the flow of the crude oil, natural gas and water can be figured out separately. By means of the online measurement method and device for the flow of the three phases including the crude oil, the natural gas and the water, the difficulty in measurement of the flow of the crude oil is solved, and the efficiency of heating a crude oil wellhead is improved. The measurement method is novel, unique and scientific, and the measurement device is reliable, free of components which are likely to be damaged, high in measurement precision and reliable in data.

The invention provides a power transmission line wind speed measurement method, system and device and a storage medium. The method comprises the following steps: measuring a strong-wind-load-free actually-measured tension value of a suspension tower insulator string through a tension sensor in advance; according to the actually measured tensile force value without the strong wind load, obtaining the vertical span of the overhanging tower; measuring a strong wind load actual measurement tension value of the suspension tower insulator string through the tension sensor; obtaining the wind load per unit length of the power transmission line according to the vertical span of the overhanging tower and the actually measured tensile force value of the strong wind load; and obtaining a wind speed value according to the wind load per unit length of the power transmission line. The real wind load borne by the power transmission line can be effectively measured only by installing the tension sensor at the hanging point of the ground wire of the suspension tower to measure the tension of the insulator chain, and then the real and accurate wind speed is obtained, so that the measurement method is simple, scientific, reliable and wide in application range; and the troubleshooting efficiency of the power transmission line safety is improved, and the monitoring, operation and maintenance cost of the power transmission line safety is saved.

The invention relates to the technical field of spatial migration analysis of carbon dioxide in a geological reservoir, and discloses a system and a method for monitoring carbon dioxide migration and geological sequestration on line by using a nuclear magnetic resonance technology. The system for monitoring carbon dioxide migration and geological sequestration on line by using the nuclear magnetic resonance technology comprises a rock core bidirectional displacement unit, a temperature and pressure integrated control unit and a nuclear magnetic resonance on-line monitoring data processing unit, the method comprises the following steps: saturating formation water in a rock core, calculating the permeability of the rock core, injecting compressed carbon dioxide in the forward direction, soaking, injecting formation water in the reverse direction, and monitoring and collecting nuclear magnetic resonance signals of fluid in the rock core. By adopting the system and the method provided by the invention, the water content of pores with different pore diameters of a rock core in different fluid injection stages can be intuitively observed, and the migration and distribution data of carbon dioxide and formation water in a reservoir can be calculated in real time, and quantitative and accurate measurement and description of microscopic pore channels and positions related to specific migration and distribution of carbon dioxide and formation water in a reservoir are realized.

The invention belongs to the technical field of irregular oil gas development and production increase, and particularly relates to an evaluating method of oil and gas reservoir seepage by supercritical carbon dioxide fracturing fluid and a method thereof; a carbon dioxide pressurizing and filling system provides carbon dioxide air source and pressure, and is connected with a supercritical carbon dioxide fracturing fluid phase balance reaction system; the supercritical carbon dioxide fracturing fluid phase balance reaction system is linked with a temperature control system in parallel; a core displacement and permeability measuring system is respectively connected with the supercritical carbon dioxide fracturing fluid phase balance reaction system and a return pressure system, so that the fracturing fluid is effected on the core; the return pressure system provides necessary return pressure for experiment, so as to simulate the real formation condition. The device can adjust the experiment temperature and pressure according to different experiments, and exactly determine the damage rate of the supercritical carbon dioxide fracturing fluid core, and study influences of supercritical carbon dioxide fracturing fluid on the core damage rate under different experimental conditions.

The invention provides a multi-core cable noninvasive current measurement method and measurement device. According to the method, the tangential components and the radial components of a multi-core lead surrounding magnetic field are measured by using a magnetic resistance sensor, the obtained tangential components and the radial components of the magnetic field are analyzed through the Biot-Savart law and the position coordinates of the lead in the multi-core cable and the current value borne by the corresponding lead of the corresponding coordinates are obtained, and the measurement precision and accuracy can be further enhanced through error estimation and magnetic field intensity compensation. According to the multi-core cable noninvasive current measurement method and measurement device, detection of the multi-core cable surrounding magnetic field and noninvasive measurement of the current can be realized so that the current detection efficiency of the multi-core cable can be enhanced.

The present invention relates to the field of petroleum fracturing, and provides an apparatus for measuring the rheological property of a supercritical carbon dioxide fracturing fluid. The apparatus comprises a supercritical carbon dioxide pressurization system, a tackifier injection mixing system and a supercritical carbon dioxide fracturing fluid circulation circuit, wherein the supercritical carbon dioxide pressurization system can input carbon dioxide into the supercritical carbon dioxide fracturing fluid circulation circuit, and the tackifier injection mixing system can input a tackifier into the supercritical carbon dioxide fracturing fluid circulation circuit. The present invention further provides a method for measuring the rheological property of a supercritical carbon dioxide fracturing fluid. With the apparatus and the method of the present invention, the constitutive relations of the rheological property of the supercritical carbon dioxide under different temperatures and different pressures can be obtained.

The invention belongs to the field of oil and gas transportation engineering and relates to an experimental device and method for simulating a plugging mechanism of gas hydrate under bubble flow, and aims to realize study for a gathering formation mechanism of the gas hydrate under bubble flow in a metal pipeline indoors, provide precise model parameters and effective data for simulating plugging formation of the gas hydrate under bubble flow in the metal pipeline, determine plugging formation speed of the gas hydrate at different bubble flow rates and simulate gathering formation mechanisms of various metal pipeline hydrates in deep water environment. The experimental device comprises a pressure control system, a gas injection system, an experimental simulation system, a cooling system, a circulating system, a water inlet and outlet system and a monitoring and storing system, wherein the pressure control system, the gas injection system, the cooling system, the circulating system and the water inlet and outlet system are all connected with the experimental simulation system and serve for the experimental simulation system, and the adhering and gathering formation mechanism of the formed hydrate in the metal pipeline is simulated and studied by controlling gas injection speed and flow rate of a liquid in a vertical pipe.

The invention discloses a large-sized spherical structure element heat treatment deformation measuring device, which comprises a spherical structure element, a measuring base plate, a laser tracking instrument and four target seats, wherein the spherical structure element is formed by an upper semicircular spherical block and a lower semicircular spherical block through welding; an annular weldingseam is formed between the two semicircular spherical blocks; the measuring base plate is placed under the semicircular spherical block positioned at the lower layer; a first station and a second station are symmetrically arranged at two sides of the measuring base plate; the first station and the second station are connected through an annular rail; the laser tracking instrument moves through the annular rail; the four target seats are used as global control sites in the transfer station process. The device has the advantages that when the measuring conditions are insufficient, a measuring method with easy operation and high efficiency is provided; all practical measuring points are fitted into a sphere by SA software; a deformation region is analyzed trough the deviation value of the practical measuring points and the fitted sphere; the deviation value of points on the deformation region is compared with the respective fitting maximum deviation value for analyzing the deformation quantity of the corresponding deformation region.

The invention belongs to the technical field of unconventional oil and gas exploitation, and in particular relates to a device and method for measuring the rheological properties of supercritical carbon dioxide fracturing fluid. The measuring devices include: supercritical carbon dioxide pressurization system, viscosifier injection mixing system and supercritical carbon dioxide fracturing fluid circulation system; the critical carbon dioxide fracturing fluid circulation system provides supercritical carbon dioxide fracturing fluid with a closed circulation loop under high temperature and high pressure, The supercritical carbon dioxide pressurization system provides the required experimental pressure for carbon dioxide, and the viscosifier is injected into the mixing system to pump the viscosifier into the high-temperature and high-pressure supercritical carbon dioxide pipeline. The invention can realize the measurement of the rheological parameters of the supercritical carbon dioxide fracturing fluid in a relatively large pressure and temperature range, and can obtain the constitutive relationship of the rheological properties of the supercritical carbon dioxide fracturing fluid under different temperature and pressure conditions; the device is simple to operate and the method It is easy to implement and has high feasibility; the measurement method is scientific and can achieve high-precision parameter measurement.

The invention belongs to the technical field of hot rolling technologies, and discloses a method for fast obtaining the strip steel sickle bend size. The method comprises the steps that the distance L1 between two measuring points of strip steel, the distance L2 between the two measuring points in the length direction of the strip steel, and the offset value h from the center line of the strip steel are obtained; a calculation model of the strip steel sickle bend size H, the distance L1 between the two measuring points, the distance L2 between the two measuring points in the length direction of the strip steel, the offset value h from the center line of the strip steel and the curvature radius R of a strip steel sickle bend is established; and a computational formula for the H is obtained according to the calculation model. The method for measuring the sickle bend size is efficient and reliable.

The invention provides a device for measuring the width of a soft package battery, and belongs to the technical field of battery measurement. The device comprises a base, a stop block, a first positioning block, a second positioning block, a toggle clamp, an air cylinder and a width measuring instrument, wherein the base is placed on the horizontal plane, the stop block is fixed to the upper surface of the base, the first positioning block is placed on the upper surface of the base, the first positioning block comprises a transverse block and a first vertical block, the transverse block is vertically arranged at the right end of the first vertical block, a soft package battery is placed on the upper surface of the transverse block, the second positioning block is arranged on the side, awayfrom the stop block, of the first positioning block, the second positioning block comprises a second vertical block and a sliding block, the toggle clamp is fixed to the upper surface of the transverse block, the air cylinder is installed on the upper surface of the base and located at the end, away from the soft package battery, of the second positioning block, and the width measuring instrumentis fixed to the upper surface of the base. The device is simple in structure and convenient to operate, replaces a manual operation mode, and is good in measurement stability and accuracy.

The invention provides a comprehensive calibration device for a concrete impermeability instrument. The comprehensive calibration device for the concrete impermeability instrument is connected with a pressure producing device in the concrete impermeability instrument; the comprehensive calibration device for the concrete impermeability instrument comprises a pressure sensor, a signal processing unit, a display and a working power supply, wherein the signal processing unit is connected with the pressure sensor; the display is connected with the signal processing unit; and the working power supply is connected with the pressure sensor, the signal processing unit and the display. The comprehensive calibration device disclosed by the invention has the beneficial effects that the system design of the comprehensive calibration device for the concrete impermeability instrument meets the value traceability requirement, and the value of the device can be accurate and reliable.

The invention discloses a simple turning tool protractor. The simple turning tool protractor comprises a basic ruler, a rotary ruler and a sliding ruler. The basic ruler is of an L shape and is divided into a horizontal end and a vertical end, and a fan-shaped dial is arranged at the corner of the basis ruler. The rotary ruler is of an L shape, wherein the corner of the rotary ruler faces downwards, and the rotary ruler is rotatably connected with the circle center of the fan-shaped dial. An arc-shaped sliding groove is formed in the fan-shaped dial. A pointer is mounted on the dial. A boss of the pointer is mounted in the arc-shaped sliding groove in an embedded mode and connected with one end of the rotary ruler. The pointer can slide along the arc-shaped sliding groove. The sliding ruler is of an L shape, wherein one end of the sliding ruler is parallel to the horizontal end of the basic ruler, and the other end of the sliding ruler is connected with the vertical end of the basic ruler in a sliding mode. The basic ruler and the sliding ruler constitute an F-shaped whole. The simple turning tool protractor has the advantages that in the same two-dimensional plane, five basic turning tool angles can be measured, and the turning tool angles are obtained directly; the measuring efficiency is improved, the structure is simple, a scientific measuring method is adopted, cost is low, and a good teaching effect is achieved.

The invention discloses a method for measuring the bubble breaking point of a sieve, which is characterized in that the sieve to be tested is wetted with a liquid, and a liquid film is formed on the surface to form a closed space together with a cavity; the closed space is pressurized, and the The gas in the confined space is in a quasi-equilibrium state. Collect and draw the pressure-time curve of the gas in the confined space. When the pressurization rate drops and there is an inflection point, the pressure at the inflection point is the bubble breaking point of the screen to be tested. The invention determines the breakage of the liquid film on the surface of the screen through the change of the pressurization rate, thereby measuring the breaking point of the screen bubble. The problem of large data errors.

The invention discloses an online measurement method and device for the flow of three phases including crude oil, natural gas and water. According to the method, firstly, a three-phase mixture fluid of the crude oil, natural gas and water is heated to demanded temperature, the heat quantity is calculated, and the average specific heat and phase ratio of the three-phase mixture fluid are obtained.A Venturi tube in an inversely U-shaped pipe is used for measuring the average density of the three-phase mixture; a horizontal Venturi tube is used for measuring the total volume flow of the three-phase mixture fluid. Through combined calculation of the density, phase ratio and total volume flow of the mixture, the flow of the crude oil, natural gas and water can be figured out separately. By means of the online measurement method and device for the flow of the three phases including the crude oil, the natural gas and the water, the difficulty in measurement of the flow of the crude oil is solved, and the efficiency of heating a crude oil wellhead is improved. The measurement method is novel, unique and scientific, and the measurement device is reliable, free of components which are likely to be damaged, high in measurement precision and reliable in data.

The invention relates to the technical field of smart bracelets, and discloses a smart bracelet capable of measuring height and weight and a measuring method thereof. The smart bracelet comprises a smart bracelet body, and an embedded computing unit is arranged in the smart bracelet body; a micro distance measuring sensor, a laser radar sensor, a single-axis gyroscope sensor and an interaction unit are fixedly mounted on the smart bracelet body, and a battery unit is further arranged in the smart bracelet body. According to the smart bracelet capable of measuring the height and the weight and the measuring method thereof, a user can measure the height and the weight of the user in real time anytime and anywhere by wearing the smart bracelet, the user can conveniently know the change of the height and the weight of the user in real time, and the measuring method is scientific and high in accuracy.

The invention belongs to the technical field of hot rolling technologies, and discloses a method for fast obtaining the strip steel sickle bend size. The method comprises the steps that the distance L1 between two measuring points of strip steel, the distance L2 between the two measuring points in the length direction of the strip steel, and the offset value h from the center line of the strip steel are obtained; a calculation model of the strip steel sickle bend size H, the distance L1 between the two measuring points, the distance L2 between the two measuring points in the length direction of the strip steel, the offset value h from the center line of the strip steel and the curvature radius R of a strip steel sickle bend is established; and a computational formula for the H is obtained according to the calculation model. The method for measuring the sickle bend size is efficient and reliable.