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

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 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 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 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 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 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.