CN112305257A - Natural gas speed measuring device - Google Patents
Natural gas speed measuring device Download PDFInfo
- Publication number
- CN112305257A CN112305257A CN201910691193.2A CN201910691193A CN112305257A CN 112305257 A CN112305257 A CN 112305257A CN 201910691193 A CN201910691193 A CN 201910691193A CN 112305257 A CN112305257 A CN 112305257A
- Authority
- CN
- China
- Prior art keywords
- natural gas
- pipe wall
- arc
- measuring device
- velocimetry
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/18—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the time taken to traverse a fixed distance
- G01P5/20—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the time taken to traverse a fixed distance using particles entrained by a fluid stream
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/18—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the time taken to traverse a fixed distance
- G01P5/22—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the time taken to traverse a fixed distance using auto-correlation or cross-correlation detection means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/26—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting optical wave
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Optical Radar Systems And Details Thereof (AREA)
- Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
Abstract
The application discloses natural gas speed sensor belongs to natural gas measurement technical field. When using the natural gas speed sensor that this application provided, the laser that laser doppler velocimeter transmitted gets into from first arc pipe wall. Because the reflectivity of the second arc-shaped pipe wall is smaller than the reflectivity threshold value, the reflection of the second arc-shaped pipe wall to the laser entering the device is reduced, and therefore the accuracy of the measured flow speed of the natural gas is improved. In addition, when adopting the PIV device to test the speed, because scribble the dull polish layer on the second arc pipe wall, the second arc pipe wall is equivalent to the background of first arc pipe wall this moment, and the second arc pipe wall is compared in first arc pipe wall darker, the spike particle has certain luminance, for the spike particle, second arc pipe wall can show the spike particle is prominent, the shooting effect of the image of shooing has been improved, consequently, can improve the rate of accuracy of confirming the velocity of flow in the natural gas speed measuring device according to the shooting image.
Description
Technical Field
The application relates to the technical field of natural gas measurement, in particular to a natural gas speed measuring device.
Background
Natural gas has been increasingly used as a clean energy source. At the same time, the detection requirements for natural gas are also increasing. For example, it is often necessary to detect the flow rate of natural gas by a natural gas velocity measurement device.
In the related art, the natural gas velocity measuring device 01 is a transparent pipe, and when natural gas flows through the natural gas velocity measuring device, the natural gas velocity measuring device measures the velocity through a laser doppler velocimeter outside the natural gas velocity measuring device 01, or measures the velocity through a Particle Image Velocimetry (PIV) device.
As shown in fig. 1, if the laser doppler velocimeter is used to measure the natural gas flow rate in the natural gas velocity measurement device 01, two laser beams emitted by the laser doppler velocimeter enter from one side of the natural gas velocity measurement device, but the other side of the natural gas pipeline reflects the two laser beams, thereby affecting the accuracy of the natural gas flow rate. As shown in fig. 2, if the PIV apparatus is used to detect the flow rate of the natural gas in the natural gas velocity measuring apparatus 01, the camera in the PIV apparatus takes a picture from the side of the natural gas velocity measuring apparatus 01. The other side of the natural gas speed measuring device 01 can influence the shooting effect of the shooting device when shooting images, so that the accuracy of determining the flow speed in the natural gas speed measuring device according to the shot images is low.
Content of application
The embodiment of the application provides a natural gas speed sensor, can improve the rate of accuracy of measuring natural gas flow speed. The technical scheme is as follows:
on one hand, the natural gas speed measuring device is provided and comprises a first arc-shaped pipe wall and a second arc-shaped pipe wall;
the first arc-shaped pipe wall and the second arc-shaped pipe wall form a pipe-type channel in a surrounding mode, and the pipe-type channel is used for allowing natural gas to pass through to be tested for speed;
the light transmittance of the first arc-shaped pipe wall is larger than the light transmittance threshold value, and the inner wall and/or the outer wall of the second arc-shaped pipe wall are/is coated with a frosted layer, so that the reflectivity of the second arc-shaped pipe wall is smaller than the reflectivity threshold value.
Optionally, the central angle of the first arced tube wall is less than or equal to 30 degrees;
when the natural gas speed measuring device is used, a laser Doppler velocimeter is adopted to detect the flow speed of the natural gas in the natural gas speed measuring device.
Optionally, the central angle of the first arc-shaped pipe wall is greater than 180 degrees;
when the natural gas velocity measuring device is used, a particle image velocity measuring PIV device is adopted to detect the flow velocity of the natural gas in the natural gas velocity measuring device.
Optionally, the natural gas speed measuring device further comprises a first flange and a second flange;
the first flange is fixed at the first end of the tubular passage, and the second flange is fixed at the second end of the tubular passage.
Optionally, the sanding layer has a thickness of less than 1 millimeter.
Optionally, the compressive strength of the tubular channel is greater than 0.3 megapascals.
Optionally, the transmittance threshold is 80%.
Optionally, the reflectance threshold is 40%.
On the other hand, a natural gas velocity measurement system is provided, and the natural gas velocity measurement system comprises any one of the natural gas velocity measurement device and the laser Doppler velocimeter;
the laser Doppler velocimeter is used for detecting the flow velocity of the natural gas in the natural gas velocity measuring device.
On the other hand, a natural gas velocity measurement system is provided, and the natural gas velocity measurement system comprises any one of the natural gas velocity measurement device and the PIV device;
the PIV device is used for detecting the flow velocity of the natural gas in the natural gas velocity measuring device.
The beneficial effects that technical scheme that this application provided brought can include at least:
when using the natural gas speed sensor that this application provided, the laser that laser doppler velocimeter transmitted gets into from first arc pipe wall. Because the reflectivity of the second arc-shaped pipe wall is smaller than the reflectivity threshold value, the reflection of the second arc-shaped pipe wall to the laser entering the device is reduced, and therefore the accuracy of the measured flow speed of the natural gas is improved. In addition, when adopting the PIV device to test the speed, because scribble the dull polish layer on the second arc pipe wall, the second arc pipe wall is equivalent to the background of first arc pipe wall this moment, and the second arc pipe wall is compared in first arc pipe wall darker, the spike particle has certain luminance, for the spike particle, second arc pipe wall can show the spike particle is prominent, the shooting effect of the image of shooing has been improved, consequently, can improve the rate of accuracy of confirming the velocity of flow in the natural gas speed measuring device according to the shooting image.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of a natural gas velocity measuring device with a doppler velocimeter provided in the related art;
FIG. 2 is a schematic diagram of a PIV apparatus for measuring natural gas velocity;
fig. 3 is a schematic diagram of a cross section of a natural gas velocity measuring device provided in an embodiment of the present application;
FIG. 4 is a schematic diagram of a cross section of another natural gas velocity measuring device provided by an embodiment of the application;
fig. 5 is a schematic structural diagram of another natural gas velocity measuring device provided in the embodiment of the present application.
Reference numerals:
01: a natural gas speed measuring device;
1: a first arcuate tube wall; 2: a second arcuate tube wall; 3: a first flange plate; 4: a second flange.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
Before explaining the natural gas speed measuring device provided by the embodiment of the present application, an application scenario of the natural gas speed measuring device provided by the embodiment of the present application is specifically explained: when the speed of the natural gas is measured, a natural gas speed measuring device, a laser Doppler velocimeter or a PIV device is used. The natural gas flows in the natural gas speed measuring device, and the laser Doppler velocimeter or the PIV device detects the flow velocity of the natural gas in the natural gas speed measuring device.
The natural gas speed measuring device is a transparent pipeline, and when natural gas flows in the natural gas speed measuring device, tracer particles are carried in the natural gas, and the flow velocity of the tracer particles is the same as that of the natural gas. When natural gas carrying tracer particles flows through the natural gas speed measuring device, the laser Doppler speed measuring instrument emits two beams of laser, and the two beams of laser cross in the natural gas speed measuring device after passing through one side of the natural gas speed measuring device to form a light spot. When the trace particles pass through the light spot, the trace particles can reflect the laser, and the reflected light is received by a receiver in the laser Doppler velocimeter. According to the frequency of the laser received by the receiver and the frequency of the emitted laser, the velocity of the trace particles can be determined by using the Doppler effect, namely the velocity of the natural gas in the natural gas velocity measuring device is determined. When adopting laser doppler velocimeter to measure the natural gas velocity of flow in the natural gas speedometer, because the natural gas speedometer is transparent pipeline, the opposite side of natural gas speedometer can reflect this two bundles of laser, make the laser after the reflection probably reach receiver department and be received by the receiver, lead to the receiver to receive laser not only including the laser of tracer particle reflection, still include the laser of the opposite side reflection of natural gas speedometer, thereby influence the accuracy of the natural gas velocity of flow in the natural gas speedometer that the doppler velocimeter measured.
Alternatively, a PIV device is used to detect the natural gas flow rate in a natural gas velocity measurement device. At this moment, the natural gas carrying the tracer particles flows through the natural gas speed measuring device, and the shooting device in the PIV device continuously shoots the natural gas speed measuring device. And (3) processing the shot pictures point by adopting an optical Young's stripe method, an autocorrelation method or a cross-correlation analysis method and other speed extraction algorithms according to the shot pictures, so that the flow speed of the natural gas in the natural gas speed measuring device can be determined. When the PIV device is used for detecting the natural gas flow velocity in the natural gas velocity measuring device, the shooting device shoots from one side of the natural gas velocity measuring device, and the other side of the natural gas velocity measuring device can become the background of one side of the natural gas pipeline. Because the natural gas speed measuring device is a transparent pipeline, the other side of the natural gas speed measuring device can influence the shooting effect of the shooting device when shooting images, and further the accuracy of the flow velocity in the natural gas speed measuring device can be determined according to the images. The natural gas speed measuring device provided by the embodiment of the application is used in the application scene.
Fig. 3 is a schematic diagram of a cross section of a natural gas velocity measuring device provided in an embodiment of the present application. As shown in fig. 3, the natural gas velocity measuring device includes a first arc-shaped pipe wall 1 and a second arc-shaped pipe wall 2. The first arc-shaped pipe wall 1 and the second arc-shaped pipe wall 2 enclose a pipe-type channel, and the pipe-type channel is used for allowing natural gas to pass through to be tested for speed. The light transmittance of the first arc-shaped pipe wall 1 is larger than the light transmittance threshold, and the inner wall and/or the outer wall of the second arc-shaped pipe wall 2 are/is coated with a frosted layer, so that the reflectivity of the second arc-shaped pipe wall 2 is smaller than the reflectivity threshold.
When using the natural gas speed sensor that this application provided, the laser that laser doppler velocimeter transmitted gets into from first arc pipe wall. Because the reflectivity of the second arc-shaped pipe wall is smaller than the reflectivity threshold value, the reflection of the second arc-shaped pipe wall to the laser entering the device is reduced, and therefore the accuracy of the measured flow speed of the natural gas is improved. In addition, when adopting the PIV device to test the speed, because scribble the dull polish layer on the second arc pipe wall, the second arc pipe wall is equivalent to the background of first arc pipe wall this moment, and the second arc pipe wall is compared in first arc pipe wall darker, the spike particle has certain luminance, for the spike particle, second arc pipe wall can show the spike particle is prominent, the shooting effect of the image of shooing has been improved, consequently, can improve the rate of accuracy of confirming the velocity of flow in the natural gas speed measuring device according to the shooting image.
In addition, when the laser doppler velocimeter and the PIV device are used for detecting the flow velocity of natural gas in the natural gas velocity measuring device, the detection principles of the laser doppler velocimeter and the PIV device are different, so that the natural gas velocity measuring device can have the following two different structures aiming at the detection principle that the laser doppler velocimeter and the PIV device need to detect the flow velocity of natural gas in the natural gas velocity measuring device:
(1) if when using the natural gas speedometer that this application embodiment provided, use the velocity of flow of the natural gas among the laser Doppler velocimeter detection natural gas speedometer. At this time, as shown in fig. 3, the central angle α of the first arc-shaped pipe wall 1 is α, and the central angle α of the first arc-shaped pipe wall 1 is less than or equal to 30 degrees.
Because laser Doppler velocimeter can launch two bundles of laser, when using laser Doppler velocimeter, this two bundles of laser can pass the first arc pipe wall of natural gas speedometer, enter into the natural gas speedometer, and then this two bundles of laser are crossing forms a light spot, and the tracer particle that the natural gas in the natural gas speedometer carried can pass this light spot. However, since the second arc-shaped pipe wall is coated with the frosting layer, the frosting layer can enable the two beams of laser to form diffuse reflection, and the reflectivity of the second arc-shaped pipe wall is smaller than the reflectivity threshold value. Thus, the reflected light of the two laser beams after reflection on the second arc-shaped tube wall is reduced. And the reflected light after reflection is not easy to transmit to a receiver, so that the accuracy of the flow velocity of the natural gas in the natural gas velocity measuring device measured according to the Doppler effect measurement principle is improved.
In addition, because the laser doppler velocimeter is after emitting two bundles of laser light, the contained angle between two propagation directions of two bundles of laser light is fixed, consequently, for making two bundles of laser light that laser doppler velocimeter emitted can enter into the natural gas velocimeter, and the two bundles of laser light reflect laser light in the natural gas velocimeter after the diffuse reflection that forms after entering the natural gas velocimeter, can not pass to the receiver department of laser doppler velocimeter, consequently, the central angle alpha of first arc pipe wall 1 is less than or equal to 30 degrees.
It should be noted that 30 degrees is determined according to a large number of experiments, when the central angle of the first arc-shaped tube wall is 30 degrees, it can be ensured that two laser beams emitted by the laser doppler velocimeter can enter the natural gas velocity measuring device from the first arc-shaped tube wall, and in addition, when the central angle of the first arc-shaped tube wall is 30 degrees at most, the central angle of the second arc-shaped tube wall is 330 degrees, and the second arc-shaped tube wall has a sufficient reflection area so that the reflected laser beams of diffuse reflection formed by the two laser beams entering the natural gas velocity measuring device are reflected on the second arc-shaped tube wall as much as possible and will not be reflected on the first arc-shaped tube wall.
In addition, if the angles are expressed by hour and minute hands on a clock, the first arc-shaped pipe wall can be between 8 o 'clock and 30 min to 9 o' clock and 30 min.
(2) If when the natural gas velocity measuring device provided by the embodiment of the application is used, the PIV device is used for detecting the flow velocity of the natural gas in the natural gas velocity measuring device. At this time, as shown in fig. 4, the central angle β of the first arc-shaped pipe wall 1 is β, and the central angle β of the first arc-shaped pipe wall 1 is greater than 180 degrees.
Because the ware of shooing among the PIV device carries the natural gas of tracer particle in the device to the natural gas speed measuring and when shooing, the first arc pipe wall of natural gas speed measuring device is towards the ware of shooing to make the ware of shooing shoot from first arc pipe wall department. At this time, the second arc-shaped pipe wall is equivalent to the background of the first arc-shaped pipe wall. Because scribble the dull polish layer on the second arc pipe wall, consequently, be equivalent to the in-process that the shooting device was shooing, can comparatively obviously distinguish between the background of first arc pipe wall and the first arc pipe wall, promptly, the second arc pipe wall is darker for first arc pipe wall for the effect that the shooting device was shot is better, therefore makes the rate of accuracy of confirming natural gas flow rate according to the image that the shooting device was shot higher.
In addition, in the shooting process of the shooting device, the shooting device shoots from the first arc-shaped pipe wall, if the central angle of the first arc-shaped pipe wall is smaller than 180 degrees, namely the central angle of the second arc-shaped pipe wall is larger than 180 degrees, at the moment, one part of the second arc-shaped pipe wall can be directly shot by the shooting device, namely, one part of the second arc-shaped pipe wall can shield tracing particles in the natural gas speed measuring device, the image shot by the shooting device is influenced, and further the flow speed accuracy of the natural gas determined according to the image shot by the shooting device is influenced. Thus, the first arcuate tube wall may have a central angle greater than 180 degrees.
It should be noted that, in order to ensure that the second arc-shaped pipe wall can form as much as possible of the background of the first arc-shaped pipe wall, the central angle of the first arc-shaped pipe wall can be less than 187.5 degrees. That is, the central angle of the first arcuate tube wall may range between 180 degrees and 187.5 degrees.
In addition, if the angles are expressed in terms of hour and minute hands on a timepiece, the first arcuate wall may be between 6 o 'clock and 12 o' clock and 6 o 'clock to 12 o' clock and 15 minutes.
In addition, when the laser doppler velocity measurement device is used to detect the flow velocity of natural gas in the natural gas velocity measurement device, laser emitted by the laser doppler velocity measurement device needs to enter from the first arc-shaped tube wall, and multiple reflections are formed on the second arc-shaped tube wall, so that the transmission of the laser is not affected by the first arc-shaped tube wall, and in some embodiments, the minimum light transmittance threshold may be 80%. The second curved wall can reduce reflection of the laser, and in some embodiments, the reflectivity threshold can be a maximum of 40%. For example, the transmittance threshold is 90 and the reflectance threshold is 10%.
In addition, because the frosted layer is coated on the second arc-shaped pipe wall, the light transmittance of the second arc-shaped pipe wall is also correspondingly reduced, the light transmittance of the second arc-shaped pipe wall can be 40%, and can also be other values.
In addition, after the second arc-shaped pipe wall is coated with the frosting layer, the laser can form diffuse reflection on the frosting layer. When the thickness of the sanding layer is large, processing costs may be increased, and in order to reduce the processing costs, the thickness of the sanding layer may be less than 1 mm in some embodiments. Of course, the thickness of the frosted layer may also be less than other values, for example, the thickness of the frosted layer is less than 0.5 mm. The thickness of the frosted layer is not limited herein.
In addition, when using the natural gas speed sensor that this application embodiment provided, because natural gas self has certain pressure, consequently, when the natural gas flows in natural gas speed sensor, still can keep intact under the pressure of natural gas in order to prevent the natural gas speed sensor, not crushed by the pressure of natural gas, consequently, the natural gas speed sensor can have certain compressive strength. In some embodiments, the compressive strength of the tubular passage in the natural gas velocimetry device may be greater than 0.3 megapascals.
When the pressure of natural gas is usually larger and can reach more than 6 MPa sometimes, the compressive strength of the tubular channel in the natural gas speed measuring device can be determined according to the test requirement. For example, the compressive strength of the tubular passage can be determined to be between 0.3 and 9 MPa.
In addition, when using the natural gas speed measuring device that this application embodiment provided, because the natural gas can reach in the natural gas speed measuring device after need transporting from the natural gas pipeline, consequently, need be connected the natural gas speed measuring device with the natural gas pipeline after, just can make the natural gas in the natural gas pipeline enter into in the natural gas speed measuring device. To facilitate the connection of the natural gas velocity measuring device to the natural gas pipeline, in some embodiments, as shown in fig. 5, the natural gas velocity measuring device may further include a first flange 3 and a second flange 4. A first flange 3 is fixed to a first end of the tubular passage and a second flange 4 is fixed to a second end of the tubular passage.
After the natural gas speed sensor includes first ring flange 3 and second ring flange 4, when using this application to be the natural gas speed sensor that the embodiment provided, can be directly be connected natural gas speed sensor and natural gas line through first ring flange 3 and second ring flange 4.
In addition, the natural gas speed sensor that this application embodiment provided can be formed by organic glass processing. After organic glass is processed into a tubular channel, a frosting layer is coated on the second arc-shaped pipe wall according to the relation between the first arc-shaped pipe wall and the second arc-shaped pipe wall, and the natural gas speed measuring device is processed.
In addition, when utilizing organic glass to process the natural gas speed sensor that this application embodiment provided, can process according to actual need. For example, the length of the tubular passage in the natural gas velocity measuring device may be processed to 0.5 m, or may be processed to 1 m or 1.5 m. The embodiments of the present application are not limited herein.
In addition, when the laser doppler velocimeter detects the natural gas flow velocity in the natural gas velocity measurement device provided by the embodiment of the application, through a plurality of tests, the uncertainty of the laser doppler velocimeter detecting the natural gas flow velocity in the natural gas velocity measurement device is better than 2%.
When using the natural gas speed sensor that this application provided, the laser that laser doppler velocimeter transmitted gets into from first arc pipe wall. Because the reflectivity of the second arc-shaped pipe wall is smaller than the reflectivity threshold value, the reflection of the second arc-shaped pipe wall to the laser entering the device is reduced, and therefore the accuracy of the measured flow speed of the natural gas is improved. In addition, when adopting the PIV device to test the speed, because scribble the dull polish layer on the second arc pipe wall, the second arc pipe wall is equivalent to the background of first arc pipe wall this moment, and the second arc pipe wall is compared in first arc pipe wall darker, the spike particle has certain luminance, for the spike particle, second arc pipe wall can show the spike particle is prominent, the shooting effect of the image of shooing has been improved, consequently, can improve the rate of accuracy of confirming the velocity of flow in the natural gas speed measuring device according to the shooting image.
The embodiment of the application provides a natural gas speed measuring system, and the natural gas speed measuring system comprises the natural gas speed measuring device and a laser Doppler velocimeter. The laser Doppler velocimeter is used for detecting the flow velocity of natural gas in the natural gas velocity measuring device.
When using laser doppler velocimeter to detect the velocity of flow of natural gas in the natural gas speed measuring device, laser doppler velocimeter launches two bundles of laser, this two bundles of laser enter into the natural gas speed measuring device from the first arc pipe wall of natural gas speed measuring device to intersect and form the light spot in the natural gas speed measuring device, natural gas in the natural gas speed measuring device carries the tracer particle, the tracer particle can reflect laser when passing through the light spot, receiver in the laser doppler speed measuring device receives after the laser of reflection, confirm the velocity of flow of natural gas in the natural gas speed measuring device according to the doppler effect.
The embodiment of the application provides another kind of natural gas speed measuring system, and this natural gas speed measuring system includes natural gas speed measuring device and PIV device. The PIV device is used for detecting the flow rate of the natural gas in the natural gas speed measuring device.
When the PIV device is used for detecting the flow velocity of the natural gas in the natural gas speed measuring device, the natural gas in the natural gas speed measuring device carries tracer particles, a shooting device in the PIV device shoots the natural gas in the natural gas speed measuring device from the first arc-shaped pipe wall, and then the flow velocity of the natural gas in the natural gas speed measuring device is determined according to a velocity extraction algorithm such as a Young's fringe method, an autocorrelation method or a cross correlation method.
In summary, the present application is only a preferred embodiment and is not intended to be limited by the scope of the present application, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A natural gas speed measuring device is characterized by comprising a first arc-shaped pipe wall (1) and a second arc-shaped pipe wall (2);
the first arc-shaped pipe wall (1) and the second arc-shaped pipe wall (2) enclose a pipe-type channel, and the pipe-type channel is used for allowing natural gas to pass through to be tested for speed measurement;
the light transmittance of the first arc-shaped pipe wall (1) is larger than the light transmittance threshold value, and the inner wall and/or the outer wall of the second arc-shaped pipe wall (2) are/is coated with a frosted layer, so that the reflectivity of the second arc-shaped pipe wall (2) is smaller than the reflectivity threshold value.
2. The natural gas velocimetry device of claim 1, characterized in that the central angle of the first curved tube wall (1) is less than or equal to 30 degrees;
when the natural gas speed measuring device is used, a laser Doppler velocimeter is adopted to detect the flow speed of the natural gas in the natural gas speed measuring device.
3. The natural gas velocimetry device of claim 1, characterized in that the central angle of the first curved tube wall (1) is greater than 180 degrees;
when the natural gas velocity measuring device is used, a particle image velocity measuring PIV device is adopted to detect the flow velocity of the natural gas in the natural gas velocity measuring device.
4. The natural gas velocimetry device of claim 1, wherein the natural gas velocimetry device further comprises a first flange (3) and a second flange (4);
the first flange plate (3) is fixed at the first end of the tubular passage, and the second flange plate (4) is fixed at the second end of the tubular passage.
5. A natural gas velocimetry device as claimed in claim 1 in which the frosted layer is less than 1 mm thick.
6. A natural gas velocimetry device as claimed in claim 1 in which the compressive strength of the tubular passage is greater than 0.3 mpa.
7. A natural gas velocimetry as claimed in claim 1 in which the threshold light transmittance is 80%.
8. A natural gas velocimetry as claimed in claim 1 in which the reflectivity threshold is 40%.
9. A natural gas velocimetry system, wherein the natural gas velocimetry system comprises a natural gas velocimetry device as claimed in any one of claims 1 to 8 and a laser doppler velocimetry;
the laser Doppler velocimeter is used for detecting the flow velocity of the natural gas in the natural gas velocity measuring device.
10. A natural gas velocimetry system, wherein the natural gas velocimetry system comprises a natural gas velocimetry device as claimed in any one of claims 1 to 8 and a PIV device;
the PIV device is used for detecting the flow velocity of the natural gas in the natural gas velocity measuring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910691193.2A CN112305257B (en) | 2019-07-29 | 2019-07-29 | Natural gas speed measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910691193.2A CN112305257B (en) | 2019-07-29 | 2019-07-29 | Natural gas speed measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112305257A true CN112305257A (en) | 2021-02-02 |
| CN112305257B CN112305257B (en) | 2022-11-04 |
Family
ID=74330013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910691193.2A Active CN112305257B (en) | 2019-07-29 | 2019-07-29 | Natural gas speed measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112305257B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100807372B1 (en) * | 2006-09-07 | 2008-02-28 | 주식회사 세기정밀 | Flow measurement method by 2d - particle image velocimetry flowmeter |
| JP2008185487A (en) * | 2007-01-30 | 2008-08-14 | Tms:Kk | Device for measuring fibrous floating particle |
| CN101430221A (en) * | 2008-12-17 | 2009-05-13 | 中国石油天然气股份有限公司 | Particle imaging device in gas pipeline |
| CN101509931A (en) * | 2009-03-16 | 2009-08-19 | 浙江大学 | Method and apparatus for on-line measuring two-dimension speed and particle size distribution of granules in pipe |
| CN202546115U (en) * | 2012-04-11 | 2012-11-21 | 中国石油集团工程设计有限责任公司 | Visible pipe for LDV (Laser Doppler Velometer) system and PIV (Particle Image Velocimetry) system |
| CN104391135A (en) * | 2014-11-21 | 2015-03-04 | 上海市计量测试技术研究院 | Calibration device and calibration method for micro wind speed based on laser doppler |
| CN105865550A (en) * | 2016-06-12 | 2016-08-17 | 中国计量科学研究院 | Gas spray pipe flow measuring device capable of online calibration |
| CN109655634A (en) * | 2018-12-18 | 2019-04-19 | 西华大学 | A kind of detection method of pump turbine tail water velocity in pipes |
-
2019
- 2019-07-29 CN CN201910691193.2A patent/CN112305257B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100807372B1 (en) * | 2006-09-07 | 2008-02-28 | 주식회사 세기정밀 | Flow measurement method by 2d - particle image velocimetry flowmeter |
| JP2008185487A (en) * | 2007-01-30 | 2008-08-14 | Tms:Kk | Device for measuring fibrous floating particle |
| CN101430221A (en) * | 2008-12-17 | 2009-05-13 | 中国石油天然气股份有限公司 | Particle imaging device in gas pipeline |
| CN101509931A (en) * | 2009-03-16 | 2009-08-19 | 浙江大学 | Method and apparatus for on-line measuring two-dimension speed and particle size distribution of granules in pipe |
| CN202546115U (en) * | 2012-04-11 | 2012-11-21 | 中国石油集团工程设计有限责任公司 | Visible pipe for LDV (Laser Doppler Velometer) system and PIV (Particle Image Velocimetry) system |
| CN104391135A (en) * | 2014-11-21 | 2015-03-04 | 上海市计量测试技术研究院 | Calibration device and calibration method for micro wind speed based on laser doppler |
| CN105865550A (en) * | 2016-06-12 | 2016-08-17 | 中国计量科学研究院 | Gas spray pipe flow measuring device capable of online calibration |
| CN109655634A (en) * | 2018-12-18 | 2019-04-19 | 西华大学 | A kind of detection method of pump turbine tail water velocity in pipes |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112305257B (en) | 2022-11-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2783192C (en) | Conical-faced ultrasonic transducer, flow meter and method | |
| US20090050809A1 (en) | Fluid Flow Monitoring Device | |
| CN110471076B (en) | Light quantum ranging telescope and ranging method | |
| US6717684B1 (en) | Target scoring system | |
| CN104198003A (en) | Ultrasonic flowmeter | |
| CN102221450A (en) | Tracking-pointing deviation measurement device for laser system | |
| WO2020162994A3 (en) | Methods and systems for detecting sensor occlusions | |
| CN112305257B (en) | Natural gas speed measuring device | |
| US8019559B1 (en) | Sonic flow meter and method | |
| CN202631065U (en) | Transmission time calibration system for time difference method ultrasonic flowmeter | |
| CN201000432Y (en) | Smog detecting chamber | |
| CN106225861A (en) | The determinator of a kind of fluid flow and airborne vehicle fuel quantity assay method | |
| CN108061812B (en) | Laser speed measuring system and method for speed of projectile | |
| CN108469531A (en) | Dual amendment type tachogenerator and calibration based on Doppler effect and measurement method | |
| CN108871211A (en) | The measurement of gas-liquid two-phase annular flow thickness of liquid film and modification method in a kind of round tube | |
| JPH0328698A (en) | Laser alarm method and laser alarm equipment | |
| US10107606B2 (en) | Device for determining the velocity of a bullet | |
| CN209513647U (en) | Detection device | |
| KR20130029997A (en) | Method for repressing reflective light from surface in flow measurement with particle image velocimetry by fluorescent material particle | |
| US11054399B2 (en) | Inspection method | |
| CN206132146U (en) | Liquid flow's survey device | |
| CN207231459U (en) | A kind of single-cylinder type range-finding telescope | |
| CN110487363A (en) | A kind of ultrasonic flowmeter detection device and detection method | |
| KR200320686Y1 (en) | Fluid Sensing Device | |
| US11268891B2 (en) | Fire extinguishing agent concentration measuring system and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |