Layered flow phase content measuring device and method based on sound intensity double-peak distribution

Abstract

The invention provides a stratified flow phase content measuring device and method based on sound intensity double-peak distribution. The stratified flow phase content measuring device comprises a sound intensity signal receiving probe (4), a probe distance measuring instrument (5), a sound wave signal transmitting probe (8) and a stratified flow phase volume fraction calculation integration module (17). The sound intensity signal receiving probe (4) and the probe distance measuring instrument (5) are arranged on the shell (3) and are connected with the stratified flow phase volume fraction calculation integration module (17) through a signal acquisition circuit (10); and the sound wave signal transmitting probe (8) is arranged on the shell (9), is used for generating ultrasonic waves, and is connected with the stratified flow phase volume fraction calculation integration module (17) through a signal transmission line (11). The device provided by the invention improves the anti-interference capability and adaptability of stratified flow phase content measurement.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of multiphase flow measurement, and particularly relates to a layered flow phase content measurement device and method based on sound intensity double-peak distribution. BACKGROUND

[0002] Layered flow is a common two-phase flow pattern, which refers to the natural stratification of two immiscible fluids (such as gas-liquid, liquid-liquid) in a pipeline or container due to density difference, forming a clear interface and no obvious mixing flow state. In power engineering, there is two-phase stratified flow of steam and cooling water, in petroleum engineering, there is two-phase stratified flow of formation water and crude oil, and in chemical engineering, there is two-phase stratified flow of light phase solution and heavy phase solution.

[0003] For two-phase flow phase fraction measurement, existing technical solutions use pressure drop characteristics, electrical conductivity and capacitance characteristics, density characteristics, optical characteristics, and sound wave propagation speed characteristics to measure the phase fraction. The differential pressure phase fraction measurement device can calculate the phase fraction by measuring the static pressure difference caused by the density difference of the two phases of the stratified flow and combining the height difference, but it is only suitable for stable stratified flow under fixed conditions. Once the interface fluctuates, this type of device has poor dynamic response and cannot track rapid interface fluctuations. The electrical conductivity and capacitance type two-phase flow measurement technology is based on the difference in dielectric constant / conductivity of different phases, and calculates the phase fraction by the change of capacitance or impedance between electrodes. This method has fast response speed (millisecond level) and is suitable for dynamic monitoring, but it has high dependence on medium and requires significant difference in electrical properties of two phases, so it is not suitable for flow measurement of similar conductivity media such as alcohol-water two-phase flow. At the same time, the influence of multiphase mixing interference on this method is huge, and if there is local emulsification in the stratified flow, the error will increase sharply. Therefore, the electrical conductivity and capacitance type technical solution is not suitable for flow measurement of alcohol-water two-phase flow. Gamma rays, X-rays and other methods use the difference in absorption of different density phases (such as lower absorption rate of gas than liquid) to calculate the phase fraction by detecting the attenuation signal of the detector, but this method has slow response speed and is not suitable for rapidly fluctuating flow patterns, and the measurement error increases for high-density liquids. In view of the public safety requirements of nuclear radiation, this method can only be applied in a small range and is difficult to popularize and promote on a large scale. Optical devices such as optical fibers and lasers use the refraction / reflection characteristics of light at the phase interface to determine the phase fraction by changes in light intensity or wavelength. However, this type of device has very high requirements for light transmission, and the medium needs to be transparent or translucent (not suitable for turbid fluids such as crude oil), which requires opening windows in the pipeline or embedding transparent mirrors, which damages the structural strength and can only be applied in a specific range. Traditional acoustic devices use the difference in sound wave propagation speed in different phases (such as different sound speeds of oil and water) to analyze the phase fraction by time of flight. Compared with other types of equipment, this type of device has the advantages of non-contact or optional invasiveness, strong adaptability, good real-time performance, and high safety, but it is easily disturbed by impurities in the phase, for example, if the light phase contains bubbles (such as dissolved gas in oil), the measurement accuracy will decrease, and it is limited by the pipe material and is not suitable for accurate measurement of two-phase flow phase fraction.

[0004] Therefore, the existing phase content measurement method of two-phase flow has certain limitations, especially when applied to two-phase stratified flow, the existing phase content measurement scheme often fails due to the fluctuation characteristics of two phases in stratified flow, and the anti-interference ability and adaptability of measurement are poor. SUMMARY

[0005] Therefore, the present application provides a stratified flow phase content measurement device and method based on sound intensity double peak value distribution to solve the above problems.

[0006] The present application provides a stratified flow phase content measurement device based on sound intensity double peak value distribution, comprising: a sound intensity signal receiving probe (4), a probe spacing range finder (5), a sound wave signal transmitting probe (8), a stratified flow phase content calculation integrated module (17); the sound intensity signal receiving probe (4) and the probe spacing range finder (5) are installed on the shell (3) and connected with the stratified flow phase content calculation integrated module (17) through a signal acquisition line (10); the sound wave signal transmitting probe (8) is installed on the shell (9) and used for generating ultrasonic waves, and is connected with the stratified flow phase content calculation integrated module (17) through a signal transmission line (11).

[0007] In another implementation mode of the present application, the stratified flow phase content calculation integrated module (17) comprises a sound intensity signal acquisition module (12), a probe spacing detection module (13), a sound wave transmitting module (14), a sound intensity double peak value distribution and probe spacing integrated analysis module (15), and a stratified flow phase content calculation module (16); the sound intensity signal receiving probe (4) and the probe spacing range finder (5) are respectively connected with the sound intensity signal acquisition module (12) and the probe spacing detection module (13) through the signal acquisition line (10); the sound wave signal transmitting probe (8) generates ultrasonic waves and is connected with the sound wave transmitting module (14) through the signal transmission line (11).

[0008] In another implementation mode of the present application, the sound intensity signal acquisition module (12) is used for acquiring a corresponding signal relative intensity value at each probe position, and the received signal relative intensity is the signal intensity received by the sound intensity receiving probe or the signal intensity transmitted by the sound wave transmitting probe; the probe spacing detection module (13) is used for detecting and recording the position information of the probe; and the sound intensity double peak value distribution and probe spacing integrated analysis module (15) is used for generating a complete intensity curve.

[0009] In another implementation mode of the present application, the sound wave signal transmitting probe (8) is fixedly installed in the guide rail clamp (1) through the shell (9); and the sound intensity signal receiving probe (4) is slidingly installed in the guide rail clamp (1) through the shell (3).

[0010] In another implementation manner of the present application, the sound wave signal emitting probe (8) is fixed at the right end of the guide rail, and the distance from the sound wave signal emitting probe (8) to the rightmost end of the guide rail is greater than 10 mm; the sound intensity signal receiving probe (4) is installed on the left slide table of the sound wave signal emitting probe (8) and can move horizontally on the guide rail, and the guide rail has fixed clamping grooves at both ends; before measurement, the two probe housings are opposite to each other with zero distance contact, and the probe spacing is obtained in real time by a probe spacing distance measuring instrument with an accuracy of 0.1 mm.

[0011] In another implementation manner of the present application, the guide rail clamp (1) is fixed at the lowermost part of the measurement pipeline through the rolling strip (2) and is parallel to the center line of the pipeline.

[0012] In another aspect of the present application, a layered flow phase content measurement method based on sound intensity double-peak value distribution is provided, and the method comprises the following steps: a sound wave signal emitting probe emits a beam of sound wave signals with a certain frequency and intensity, the sound wave signals enter the lower fluid in the pipeline after passing through the wall at the bottom of the pipeline; the sound wave signals in the reflection path on the phase interface return to the original medium, and are collected by an external sound intensity signal receiving probe through the pipeline wall; the sound wave signals in the reflection path on the pipeline wall pass through the boundary after being propagated in the upper fluid and reflected by the upper wall, and then enter the lower fluid after passing through the boundary again, and are collected by the sound intensity signal receiving probe; a layered flow phase content calculation integrated module calculates according to the collected sound wave signals to obtain the phase content of the lower fluid and the upper fluid, respectively.

[0013] In another implementation manner of the present application, the phase content of the lower fluid is α 1F :

[0014]

[0015] wherein a dimensionless height k=h 1F / D is defined, and 0≤k≤1; D is the inner diameter of the pipeline.

[0016] The phase content of the upper fluid is α 2F :

[0017] α 2F =1-α 1F .

[0018] In another aspect of the present application, an electronic device is provided, which comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the layered flow phase content measurement method based on sound intensity double-peak value distribution according to any one of the above aspects when executing the computer program.

[0019] Another aspect of the present application provides a computer storage medium, wherein the computer storage medium stores a computer program, and the computer program is executed by a processor to implement the steps of the method for measuring the content of stratified flow phase based on the bimodal distribution of acoustic intensity according to any one of the above aspects.

[0020] The device for measuring the content of stratified flow phase based on the bimodal distribution of acoustic intensity according to the present application can identify the intensity peaks of the reflection signals of the sound waves formed on the interface of the two-phase fluid and on the pipe wall, instead of relying on the propagation time difference in the conventional time-of-flight method, thereby significantly improving the measurement stability and signal identification stability under the conditions of impurity interference and unstable phase interface, and having stronger applicability. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. The advantages and benefits in the solutions will become clear and obvious to those skilled in the art by reading the following detailed description of the embodiments. The drawings are only for the purpose of illustrating the preferred embodiments, and are not considered as limiting the present application.

[0022] In the drawings:

[0023] Figure 1 The device for measuring the content of stratified flow phase based on the bimodal distribution of acoustic intensity according to an embodiment of the present application is shown in the structural schematic diagram.

[0024] Figure 2 The device for measuring the content of stratified flow phase based on the bimodal distribution of acoustic intensity according to an embodiment of the present application is shown in the structural schematic diagram.

[0025] Figure 3 The device for measuring the content of stratified flow phase based on the bimodal distribution of acoustic intensity according to an embodiment of the present application is shown in the structural schematic diagram. DETAILED DESCRIPTION

[0026] In order to make the technical solutions in the embodiments of the present application better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be described clearly and in detail below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the embodiments of the present application, all other embodiments obtained by those skilled in the art should belong to the scope of protection of the embodiments of the present application.

[0027] Figure 1 The device for measuring the content of stratified flow phase based on the bimodal distribution of acoustic intensity according to an embodiment of the present application is shown in the structural schematic diagram, as shown in Figure 1 The present embodiment mainly includes:

[0028] The sound intensity signal receiving probe (4), the probe spacing distance measuring instrument (5), the sound wave signal emitting probe (8), and the layered flow phase content calculation integrated module (17).

[0029] The sound intensity signal receiving probe (4) and the probe spacing distance measuring instrument (5) are installed on the shell (3) and connected with the layered flow phase content calculation integrated module (17) through a signal collection line (10).

[0030] The sound wave signal emitting probe (8) is installed on the shell (9) and used for generating ultrasonic waves and connected with the layered flow phase content calculation integrated module (17) through a signal transmission line (11).

[0031] The layered flow phase content measurement device based on sound intensity double-peak value distribution of the application can replace the dependence of the traditional time-of-flight method on the propagation time difference by identifying the intensity peak values of the reflection signals of sound waves formed on the two-phase fluid interface and on the pipe wall, thereby significantly improving the measurement stability and signal identification stability under the conditions of impurity interference and unstable phase interface and having stronger applicability.

[0032] In another implementation manner of the application, the layered flow phase content calculation integrated module (17) comprises a sound intensity signal collection module (12), a probe spacing detection module (13), a sound wave emitting module (14), a sound intensity double-peak value distribution and probe spacing integrated analysis module (15), and a layered flow phase content calculation module (16); the sound intensity signal receiving probe (4) and the probe spacing distance measuring instrument (5) are connected with the sound intensity signal collection module (12) and the probe spacing detection module (13) through a signal collection line (10) respectively; the sound wave signal emitting probe (8) generates ultrasonic waves and is connected with the sound wave emitting module (14) through a signal transmission line (11).

[0033] Exemplarily, the device of the application mainly comprises the following components: a guide rail clamp fixedly installed at the bottom of a pipeline, a sound wave emitting probe installed at one end of the guide rail clamp, a sound wave receiving probe capable of translating along the guide rail, a spacing detection module (which can be a laser distance measuring device or an image recognition system) for recording the position of the probe in real time, a sound intensity collection module, a sound intensity double-peak value distribution and probe spacing joint analysis module, and a layered flow phase content calculation module.

[0034] The aforementioned modules constitute a complete measurement system capable of acquiring the geometric parameters of the layered structure of two-phase fluids within a pipe online. Combined with image recognition and signal processing technologies, it enables dynamic, continuous, and non-invasive calculation of the phase content. The principle utilizes the double-peak distribution of sound intensity caused by reflections at the phase interface and through the pipe wall. By combining this with the geometric relationship between the sound wave propagation path and the probe spacing, the system accurately identifies the interface location, thereby measuring the phase content of the lower and upper layers of the layered flow. The sound waves described in this application are primarily ultrasonic waves, but infrasound or other types of pressure waves can also be used.

[0035] In another implementation of the present invention, the sound intensity signal acquisition module (12) is used to acquire a corresponding relative signal intensity value for each probe position, and the received relative signal intensity is the signal intensity received by the sound intensity receiving probe or the signal intensity emitted by the sound wave emitting probe; the probe spacing detection module (13) is used to detect and record the position information of the probe; the sound intensity double peak distribution and probe spacing integrated analysis module (15) is used to generate a complete intensity curve.

[0036] For example, in the sound intensity signal acquisition module (12), a corresponding relative signal intensity value is acquired for each probe position. The received relative signal intensity is the signal intensity received by the sound intensity receiving probe / the signal intensity emitted by the sound wave emitting probe. The position information is also recorded simultaneously by the probe spacing detection module (13), and a complete intensity curve is formed by the sound intensity double peak distribution and probe spacing integrated analysis module (15).

[0037] Theoretically, as the receiving probe slides closer to the receiver, the signal strength gradually increases, such as... Figure 2 As shown, when the sound wave is fully aligned with the reflection path ① at the interface, the received signal intensity reaches the first peak. After moving further, the signal intensity decreases again, and then strengthens again and forms a second peak when it reaches the position corresponding to the reflection path ② on the pipe wall. These two intensity peaks correspond to the shortest propagation distance of the reflection path at different interfaces, and the difference in probe spacing between the peaks provides the core geometric information required to reconstruct the interface height. The distance measured by the rangefinder is the distance between the probe housing head and the probe housing head. Therefore, it needs to be corrected in the sound intensity double peak distribution and probe spacing integrated analysis module (15). The probe spacing is obtained by adding twice the fixed distance from the probe housing head to the probe. The peak detection algorithm is used to identify the two signal intensity peaks corresponding to the two reflection paths and extract the positions of the two significant signal intensity peaks. The sound intensity double peak distribution and probe spacing analysis module adopts a curve processing method based on feature extraction algorithm. After filtering, denoising and normalizing the received signal, the positions of the two significant signal intensity peaks are extracted using the second derivative edge detection algorithm or polynomial fitting method.

[0038] In another implementation of the present application, the sound wave signal emitting probe (8) is fixedly installed in the guide rail clamp (1) through the shell (9); and the sound intensity signal receiving probe (4) is slidingly installed in the guide rail clamp (1) through the shell (3).

[0039] Exemplarily, the sound wave probe assembly comprises an internal sound wave probe, an internal probe distance range finder, and an external shell in which the probe is arranged. The cross section of the probe can be circular, elliptical, or other shapes; the cross section of the length direction vibration needle can be uniform or non-uniform. The external shell can be made of metal, plastic, composite material, or other materials.

[0040] In another implementation of the present application, the sound wave signal emitting probe (8) is fixed at the right end of the guide rail, and the distance from the right end of the guide rail is greater than 10 mm; the sound intensity signal receiving probe (4) is installed on the left slide table of the sound wave signal emitting probe (8) and can move horizontally on the guide rail, and the guide rail has fixed clamping grooves at both ends; before measurement, the two probe shell heads are opposite and in contact with each other, the probe distance is obtained in real time by the probe distance range finder, and the accuracy is 0.1 mm.

[0041] Exemplarily, as shown in Figure 2 The sound wave signal emitting probe (8) is installed on the sound wave signal emitting probe shell (9), the sound intensity signal receiving probe (4) and the probe distance range finder (5) are installed on the sound intensity signal receiving probe shell. Each shell is installed in the guide rail sliding groove (7), and the guide rail clamp (1) is fixed to the lowermost part of the horizontal pipeline (18) through the rolling belt (2).

[0042] The sound wave signal emitting probe (8) emits a beam of sound wave signals with certain frequency and intensity, and the signals enter the lower fluid 1 (20) in the pipeline after passing through the wall at the bottom of the pipeline. When the sound wave reaches the interface between the upper and lower fluids, due to the significant difference in density and sound speed between the two-phase fluids, part of the sound wave is reflected on the interface and part of the sound wave penetrates into the upper fluid. The signal in the reflection path ① of the sound wave on the interface returns to the original medium and is collected by the external receiving probe through the wall; the signal in the reflection path ② of the sound wave on the pipeline wall penetrates through the interface, propagates in the upper fluid 2 (19), is reflected by the upper wall, penetrates through the interface again, enters the lower fluid 1 (20), and is finally received by the sound intensity signal receiving probe (4). Since the probe moves on the guide rail, the signal intensity received at different probe positions (i.e. different probe distances) changes.

[0043] In another implementation of the present application, the guide rail clamp (1) is fixed to the lowermost part of the measurement pipeline through the rolling belt (2) and is parallel to the center line of the pipeline.

[0044] Exemplarily, the guide rail and the rolling belt can be made of metal, plastic, composite material or other materials.

[0045] In another implementation manner of the present application, the probe distance measuring instrument can be replaced by a high-speed camera for shooting dynamic images or videos of the visual markers of the double probes. Correspondingly, the probe distance detection module can be replaced by a visual signal extraction module, which is programmed by using a visual signal analysis method to track the displacement of the scale visual markers in each dynamic image and extract the distance visual signals therefrom. The stratified flow phase content calculation integrated module can be realized by programming in a computer or in a single-chip microcomputer.

[0046] The two-phase flow phase content measuring device of the present application is not affected by the interface fluctuation characteristics of the stratified flow, and is not affected by the conductivity, density characteristics and optical characteristics, and has engineering practical value for solving the dynamic phase content measurement of the two-phase stratified flow, especially the two-phase stratified flow of formation water and crude oil in petroleum engineering, and the two-phase stratified flow of light phase solution and heavy phase solution in chemical engineering.

[0047] In another aspect of the present application, a stratified flow phase content measurement method based on sound intensity double-peak distribution is provided, characterized by comprising:

[0048] The sound wave signal emitting probe emits a beam of sound wave signals with a certain frequency and intensity, and the sound wave signals enter the lower fluid inside the pipeline after passing through the wall surface at the bottom of the pipeline.

[0049] The sound wave signals in the reflection path in the phase interface return to the original medium, and are collected by the external sound intensity signal receiving probe via the pipeline wall surface.

[0050] The sound wave signals in the reflection path on the pipeline wall surface propagate in the upper fluid after passing through the interface, are reflected by the upper wall surface, and are collected by the sound intensity signal receiving probe after passing through the interface again.

[0051] The stratified flow phase content calculation integrated module calculates according to the collected sound wave signals to obtain the phase contents of the lower fluid and the upper fluid, respectively.

[0052] In another implementation manner of the present application, the lower fluid phase content α 1F :

[0053]

[0054] wherein, let the dimensionless height k = h 1F / D, then 0≤k≤1; D is the inner diameter of the pipeline.

[0055] The upper fluid phase content α 2F :

[0056] α 2F =1-α 1F .

[0057] Exemplarily, a complete acoustic-geometric modeling method is designed in the stratified flow phase fraction calculation module. First, the propagation angle of the sound wave in different media is determined. According to the above angle relationship, the theoretical length of the sound wave in the reflection path of different interfaces can be calculated respectively, and the interface height is deduced reversely combined with the peak position measured by the probe spacing. After obtaining the interface height, the pipeline cross section is further simplified as a circular cross section model. Using the circular arc area formula, the cross section is divided into upper and lower two regions, and the corresponding arc area of the lower fluid is calculated. This geometric model can adapt to different pipe diameters, different stratification positions and different medium combinations, and has good universality.

[0058] Specifically, the propagation angle of the sound wave in different media is determined.

[0059] The refraction relationship of the sound wave passing through the interface of different media is:

[0060]

[0061] Wherein, θ s , θ 1F , θ 2F are the incident angles of the sound wave in the pipe wall, the lower fluid 1 and the upper fluid 2 respectively, c s , c 1F , c 2F are the propagation speeds of the sound wave in the pipe wall, the lower fluid 1 and the upper fluid 2 respectively.

[0062] According to the above angle relationship, the theoretical length of the sound wave in the propagation path of the pipe wall, the lower fluid and the upper fluid is calculated respectively:

[0063]

[0064] In formula (2), L S is the total sound path of the sound wave in the pipe wall, and h s is the thickness of the pipe wall.

[0065] In formula (3), L 1F is the total sound path of the sound wave in the lower fluid 1, and h 1F is the interface height thereof.

[0066] In formula (4), L 2F is the total sound path of the sound wave in the upper fluid 2.

[0067] When the probe just receives the signal of the sound wave in the reflection ① path, the distance z 1P between the two probes is:

[0068]

[0069] z in formula (5) 1P is the distance between the two probes when the probe just receives the signal of the sound wave in the reflection ① path.

[0070] z in formula (5) 2P is the distance between the two probes when the probe just receives the signal of the sound wave in the reflection ① path.

[0071]

[0072] z in formula (6) 2P is the distance between the two probes when the probe just receives the signal of the sound wave in the reflection ① path.

[0073] Therefore, by geometric relationship, the relationship formula of z 1F , z 1P , z 2P is obtained, and h 1P can be inversely solved from the known z 2P , z 1F , so that the phase content rate is obtained.

[0074] In the layered flow phase content rate calculation module (16), the interface divides the cross section of the circular tube into two arc regions, and the area A 1F of the phase is calculated by the arc area formula.

[0075]

[0076] D in formula (7) is the inner diameter of the pipeline.

[0077] The phase content rate α 1F of the lower fluid is calculated.

[0078]

[0079] Let the dimensionless height k = h 1F / D, then 0 ≤ k ≤ 1, and the formula is:

[0080]

[0081] The phase content rate α 2F of the upper fluid is calculated.

[0082] α 2F = 1- α 1F (10)

[0083] Example 1

[0084] 1) The liquid-liquid two-phase flow of No. 46 white oil and deionized water is carried out in a horizontal pipe under normal temperature and pressure conditions; the pipe has an inner diameter of 0.05 meters, i.e., D = 0.05 meters in equations (7) and (8); the wall thickness is h. s =0.005 meters of transparent PVC round pipe, i.e., h in equations (2), (5) and (6) s =0.005 meters. With deionized water as the lower layer fluid and No. 46 white oil as the upper layer fluid, then in equation (1), c s =2540 m / s, c 1F =1480 m / s, c 2F =1340 m / s. Deionized water is first injected into the pipe to form the bottom liquid, and then white oil is slowly injected, allowing it to float on the top layer. Based on mass and volume control, the final white oil has a volume distribution of approximately 80%.

[0085] 2) The guide rail measurement system consists of a guide rail clamp (1), a guide rail slide (7), and a guide rail scale (6), installed below the pipe, with the guide rail strictly parallel to the center line of the pipe. The guide rail scale resolution is 0.0005 meters, and the slide travel range is 0-0.1 meters. The transmitting probe is fixed at the right end of the guide rail, with its center 0.01 meters from the rightmost end of the guide rail; the receiving probe is installed on the slide and can move horizontally on the guide rail. The incident angle of the ultrasonic wave in the pipe is known to be 53 degrees, then θ in equation (1) s =53 degrees, θ s c s c 1F and c 2F Substituting the numerical value into equation (1) yields θ. 1F =69.4 degrees, θ 2F =71.5 degrees, and then the probe spacing is obtained in real time by the probe spacing rangefinder (5), with an accuracy of 0.0001 meters.

[0086] 3) Slowly move the receiving probe from its initial position near the transmitting probe (starting distance 0 meters) to a maximum distance of 0.05 meters. For example... Figure 3 As shown, in the acoustic intensity signal acquisition module (12), the system acquires a corresponding relative intensity value of the ultrasonic signal for each probe position. The position information is also recorded simultaneously by the probe spacing detection module (13), and a complete intensity curve is formed by the acoustic intensity bipeak distribution and probe spacing integrated analysis module (15). The distance measured by the rangefinder is the distance between the probe housing heads, so it needs to be corrected in the acoustic intensity bipeak distribution and probe spacing integrated analysis module (15), plus the fixed distance z from the two probe housing heads to the probe. t= 0.008 meter. The corresponding received intensity and probe spacing of each group of data are bound to construct the intensity-position data curve; the two signal intensity peaks corresponding to the reflection path and the refraction path are identified by using the peak detection algorithm. The two probe spacings z 1P = 0.0354 meters and the two probe spacings z 2P = 0.0441 meters when the probe just receives the signal of the ultrasonic wave in the reflection path ②.

[0087] 4) In the stratified flow phase fraction calculation module (16), the relationship between h 1F and z 1P in the reflection path ① of the ultrasonic wave on the phase interface is:

[0088]

[0089] And the relationship between h 1F and z 2P in the reflection path ② of the ultrasonic wave on the pipe wall is:

[0090]

[0091] Knowing that θ s = 53 degrees, θ 1F = 69.4 degrees, θ 2F = 71.5 degrees, the pipe diameter D = 0.05 meters, the two probe spacings z 1P = 0.0354 meters when the probe just receives the signal of the ultrasonic wave in the reflection path ①, and the two probe spacings z 2P = 0.0441 meters when the probe just receives the signal of the ultrasonic wave in the reflection path ②, the h 1F = 0.0371 meters in the reflection path ① of the ultrasonic wave on the phase interface and the h 1F = 0.0378 meters in the reflection path ② of the ultrasonic wave on the pipe wall are calculated by the relationship between h p and z 1F , and the average value of the two h 1F is (0.0371+0.0378) / 2 meters = 0.03745 meters.

[0092] Then the dimensionless height k = h 1F / D = 0.03745 / 0.05 = 0.749, and the lower fluid phase fraction can be obtained by substituting the formula (9):

[0093]

[0094] The upper fluid phase fraction α 2F = 1-α 1F = 0.197.

[0095] The device and method provided by the application identify two peak values of acoustic intensity by recording the distribution curve of acoustic intensity changing with the distance between the sound wave signal emitting probe and the acoustic intensity detection probe, and the two peak values correspond to the reflection of the sound wave on the interface and the reflection on the pipe wall respectively. The phase hold rate of each phase in the two-phase stratified flow in the pipe is calculated by using the distance corresponding to the double peak values and combining the geometric relationship of the pipe (18) structure parameters and the sound wave propagation path. The technical bottlenecks of the traditional phase hold rate measurement method, such as low measurement accuracy, slow response and poor device applicability under the conditions of interface disturbance, unstable flow pattern and bubble interference, are overcome, and the device has obvious technical advantages and engineering practical value. The two-phase stratified flow measurement is easily affected by liquid bullets and bubbles, and the traditional measurement method depending on the flight time cannot avoid such interference.

[0096] Compared with the prior art, the beneficial effects of the application include:

[0097] By identifying the intensity peak values of the reflection of the sound wave on the two-phase fluid interface and the reflection on the pipe wall, the dependence on the propagation time difference of the traditional flight time method is replaced, and the measurement stability and signal identification stability under the conditions of impurity interference and unstable phase interface are significantly improved. Especially in the oil-water stratified flow, gas-liquid stratified flow, non-ideal flow field containing small bubbles or liquid droplets, accurate identification and stable measurement can still be realized, and the applicability is stronger.

[0098] The geometric modeling and stratified area inversion method proposed in the application does not need to fit the prior medium characteristics, and a unified mathematical model can be widely used in different pipe diameters, different fluid components and different arrangement modes (horizontal or inclined pipe) of the measurement scene. The phase hold rate calculation method is based on the arch area theory, has clear structure, high calculation precision, and is convenient for system integration and digital deployment.

[0099] The non-contact measurement principle is adopted, and the plug-in probe or internal sampling equipment is not needed, so that the device has the advantages of simple installation, strong system stability and safe and reliable operation; at the same time, the device does not involve parameters sensitive to the fluid properties such as conductivity, dielectric constant or radiation absorption, and can be adapted to most industrial two-phase stratified flow occasions.

[0100] In another aspect of the application, an electronic device includes a processor, a memory, and a communication bus, a communication interface.

[0101] Among them:

[0102] The processor, the memory and the communication interface complete the communication among each other through the communication bus.

[0103] The communication interface is used for communication with other electronic devices or servers.

[0104] The processor is configured to execute a program, and specifically, execute the steps of any one of the above-mentioned embodiments of the method for measuring stratified flow phase content based on bimodal distribution of acoustic intensity.

[0105] Specifically, the program can include program code comprising computer operation instructions.

[0106] The processor can be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application. The one or more processors included in the smart device can be processors of the same type, such as one or more CPUs; or can be processors of different types, such as one or more CPUs and one or more ASICs.

[0107] The memory is configured to store the program. The memory can include a high-speed RAM memory, and can further include a non-volatile memory, such as at least one disk memory.

[0108] The program can be specifically configured to cause the processor to execute the steps of any one of the embodiments of the method for measuring stratified flow phase content based on bimodal distribution of acoustic intensity. The specific implementation of each step in the program can refer to the corresponding description of the steps and units executed by any one of the above-mentioned embodiments of the method for measuring stratified flow phase content based on bimodal distribution of acoustic intensity, which will not be described herein. It can be clearly understood by those skilled in the art that, for the convenience and brevity of description, the specific working processes of the above-mentioned devices and modules can refer to the corresponding process descriptions in the foregoing method embodiments.

[0109] The exemplary embodiments of the present application further provide a non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to cause a computer to execute the method of the embodiments of the present application.

[0110] The above-described methods according to embodiments of the application can be implemented in hardware, firmware, or software, or any combination thereof, and can be implemented as software storable on a recording medium which is readable from a general use computer, a special processor or programmable or special hardware (such as ASIC, or FPGA) using a recording medium, and the method described herein can be processed by such software on the recording medium. It can be appreciated that the computer, processor, microprocessor controller or programmable hardware includes a storage component (for example, RAM, ROM, flash memory, etc.) which can store or receive software or computer code, when the software or computer code is accessed and executed by the computer, processor or hardware, the method described herein is implemented. Furthermore, when the general-purpose computer accesses the code for implementing the method shown herein, the execution of the code will convert the general-purpose computer into a special-purpose computer for executing the method shown herein.

[0111] So far, specific embodiments of the present application have been described. Other embodiments are within the scope of the following claims. In some cases, the acts recited in the claims can be performed in a different order and still achieve desirable results. Additionally, the processes depicted in the figures do not necessarily require the particular order shown, or sequential order, to achieve the desired results.

[0112] It should be noted that all directional directions (such as up, down, left, right, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship between components, etc. in a certain order (as shown in the drawings), if the certain order changes, the directional directions also change accordingly.

[0113] In the description of the present application, the terms "first", "second" are only used for the convenience of describing different components or names, and cannot be understood as indicating or implying the order relationship, relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can be explicitly or implicitly included at least one of the features.

[0114] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0115] It should be noted that, although the specific embodiments of the present application are described in detail with reference to the accompanying drawings, it should not be understood as limiting the scope of protection of the present application. Various modifications and variations made by those skilled in the art within the scope described in the claims are still within the scope of protection of the present application.

[0116] The examples of the embodiments of the present application are intended to simply illustrate the technical features of the embodiments of the present application, so that those skilled in the art can directly understand the technical features of the embodiments of the present application, and are not improper limitations on the embodiments of the present application.

[0117] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A device for measuring stratified flow phase content based on bimodal intensity distribution, characterized by, It comprises: sound intensity signal receiving probe (4), probe spacing range finder (5), sound wave signal transmitting probe (8), stratified flow phase content rate calculation integrated module (17); the sound intensity signal receiving probe (4) and the probe spacing range finder (5) are installed on the shell (3), and are connected with the stratified flow phase content rate calculation integrated module (17) through a signal acquisition line (10); the sound wave signal transmitting probe (8) is installed on the shell (9), and is used for generating ultrasonic waves, and is connected with the stratified flow phase content rate calculation integrated module (17) through a signal transmission line (11).

2. The apparatus of claim 1, wherein, the stratified flow phase content rate calculation integrated module (17) comprises a sound intensity signal acquisition module (12), a probe spacing detection module (13), a sound wave transmitting module (14), a sound intensity double-peak value distribution and probe spacing integrated analysis module (15), and a stratified flow phase content rate calculation module (16); the sound intensity signal receiving probe (4) and the probe spacing range finder (5) are respectively connected with the sound intensity signal acquisition module (12) and the probe spacing detection module (13) through the signal acquisition line (10); the sound wave signal transmitting probe (8) generates ultrasonic waves, and is connected with the sound wave transmitting module (14) through the signal transmission line (11).

3. The apparatus of claim 2, wherein, the sound intensity signal acquisition module (12) is used for collecting a corresponding signal relative intensity value at each probe position, and the received signal relative intensity is the signal intensity received by the sound intensity receiving probe or the signal intensity transmitted by the sound wave transmitting probe; the probe spacing detection module (13) is used for detecting and recording the position information of the probe; the sound intensity double-peak value distribution and probe spacing integrated analysis module (15) is used for generating a complete intensity curve.

4. The apparatus of claim 1, wherein, the sound wave signal transmitting probe (8) is fixedly installed in the guide rail clamp (1) through the shell (9); the sound intensity signal receiving probe (4) is slidingly installed in the guide rail clamp (1) through the shell (3).

5. The apparatus of claim 4, wherein, the sound wave signal transmitting probe (8) is fixed at the right end of the guide rail, and the distance from the right end of the guide rail is greater than 10 mm; the sound intensity signal receiving probe (4) is installed on the left slide table of the sound wave signal transmitting probe (8), and can move horizontally on the guide rail, and the guide rail has fixed clamping grooves at both ends; before measurement, the heads of the two probe shells are opposite, and the zero distance is contacted, the probe spacing is obtained in real time by the probe spacing range finder, and the precision is 0.1 mm.

6. The apparatus of claim 4, wherein, the guide rail clamp (1) is fixed at the lowermost of the measurement pipeline through the rolling strip (2), and is parallel to the center line of the pipeline.

7. A method for measuring the content of stratified flow based on bimodal intensity distribution, characterized in that, It comprises: the sound wave signal transmitting probe transmits a beam of sound wave signals with certain frequency and intensity, the sound wave signals enter the lower fluid inside the pipeline after being reflected by the wall surface at the bottom of the pipeline; the sound wave signals in the reflection path on the interface return to the original medium, and are collected by the external sound intensity signal receiving probe through the pipeline wall surface; the sound wave signals in the reflection path on the pipeline wall surface propagate in the upper fluid after crossing the interface, are reflected by the upper wall surface, enter the lower fluid again after crossing the interface, and are collected by the sound intensity signal receiving probe; The layered flow phase content calculation integrated module calculates according to the collected acoustic wave signals to obtain the phase contents of the lower fluid and the upper fluid respectively.

8. The method of claim 7, wherein, The lower fluid phase content a 1F : wherein the dimensionless height k = h 1F D, then 0 < k < 1; D is the pipe internal diameter; The upper fluid phase content a 2F : α 2F ＝1-α 1F 。 9. An electronic device, comprising: The application relates to a layered flow phase content measurement method based on sound intensity double-peak value distribution. The memory, the processor and the computer program stored on the memory and executable on the processor, wherein the processor implements the steps of the layered flow phase content measurement method based on sound intensity double-peak value distribution according to any one of claims 7-8 when executing the computer program.

10. A computer storage medium, characterized in that, The computer program is stored on the computer storage medium and executable on the processor, wherein the processor implements the steps of the layered flow phase content measurement method based on sound intensity double-peak value distribution according to any one of claims 7-8 when executing the computer program.

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