CN204832239U - Portable gas velocity measuring device - Google Patents
Portable gas velocity measuring device Download PDFInfo
- Publication number
- CN204832239U CN204832239U CN201520334888.2U CN201520334888U CN204832239U CN 204832239 U CN204832239 U CN 204832239U CN 201520334888 U CN201520334888 U CN 201520334888U CN 204832239 U CN204832239 U CN 204832239U
- Authority
- CN
- China
- Prior art keywords
- tube
- stagnation pressure
- static
- pipe
- velocity measurement
- 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.)
- Active
Links
- 230000003068 static effect Effects 0.000 claims abstract description 107
- 238000005259 measurement Methods 0.000 claims description 65
- 230000007246 mechanism Effects 0.000 claims description 27
- 230000006698 induction Effects 0.000 claims description 24
- 239000002184 metal Substances 0.000 claims description 20
- 238000005452 bending Methods 0.000 claims description 14
- 229910001220 stainless steel Inorganic materials 0.000 claims description 12
- 239000010935 stainless steel Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 8
- 239000007789 gas Substances 0.000 description 32
- 230000008676 import Effects 0.000 description 8
- 239000012530 fluid Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000917 particle-image velocimetry Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Measuring Volume Flow (AREA)
Abstract
The utility model relates to an air speed measuring equipment field discloses a portable gas velocity measuring device, and this portable gas velocity measuring device presses including always and manages (3) and static tube (4) total press pipe (3) and be provided with connecting pipe (5) that to bend on the body between the both ends of static tube (4) respectively, the setting is gone up to total pipe (3) of pressing connecting pipe (5) and it is relative at least in part that connecting pipe (5) that set up are gone up in static tube (4). Because the utility model provides a be provided with the connecting pipe that to bend on portable gas velocity measuring device's the body to can fold gas velocity measuring device, shorten gas velocity measuring device's length, therefore can hand -carry or be convenient for more and transport, can reduce cost of transportation and human cost.
Description
Technical field
The utility model relates to gas velocity measurement apparatus field, particularly, relates to a kind of portable air velocity measurement mechanism.
Background technology
Gas velocity is one of important parameter of working medium motion state in thermal machine, to the course of work of the moving situation and inside of specifically understanding thermal machine, then needs the gas velocity measured wherein.The method measuring gas velocity has a variety of, such as mechanical means, rate of heat dissipation method, power manometry, laser Doppler vibration (LDV), particle image velocimetry technology (PIV) etc.Wherein, power manometry is a kind of tradition and history gas flow measurement method at most, and has pitot tube (also known as pitot, Pi Shi pipe) and backing tube etc. based on the gas velocity measurement device of power manometry.Due to the gas velocity measurement such as pitot tube and backing tube device have structure simple, use and the advantage such as easily manufactured, low price; therefore, the every field such as scientific research, production, teaching, environmental protection and decontamination chamber, mine ventilation, energy management department are widely used in.
The principle that pitot tube and backing tube measure fluid velocity is identical, that is, by being connected to manometry stagnation pressure on pitot tube or backing tube and static pressure and obtaining its difference, then can obtain speed by some physics companies such as Bernoulli equations.In actual applications, such as, when pitot tube or backing tube are used for the speed of the fluids such as flue gas in measuring channel, need to carry out velocity survey to the different parts of the sectional area of tested pipeline, because the sectional area of tested pipeline is very large, the length of usual pitot tube or backing tube also will design longer, be generally more than 2 meters, the longest can reach more than 3.7 meters.But, when fluid velocity on the sectional area removing field survey tested pipeline, due to pitot tube or backing tube longer, be not easy to carry, when particularly taking long distance transportation instrument, can not carry with, thus produce transportation cost and personal expenditures.
Therefore, the art needs a kind of portable gas velocity measurement device.
Utility model content
The purpose of this utility model is to provide a kind of portable fluid velocity measuring device, and this portable fluid velocity measuring device can be easy to carry when not carrying out surveying work or transport.
To achieve these goals, the utility model provides a kind of portable air velocity measurement mechanism, this portable air velocity measurement mechanism comprises stagnation pressure tube and static tube, body between described stagnation pressure tube and the two ends of described static tube is respectively arranged with can the connecting pipe of bending, and the described connecting pipe that described stagnation pressure tube is arranged is relative at least in part with the connecting pipe that described static tube is arranged.
Preferably, described connecting pipe is metal hose.
Preferably, the material of described metal hose is flange-connection stainless steel metal flexible pipe.
Preferably, described stagnation pressure tube and described static tube comprise bent portion respectively, and this bent portion is made up of rigid material.
Preferably, the body between the two ends of described stagnation pressure tube and described static tube is provided with multiple spaced connecting pipe.
Preferably, the spacing between adjacent two described connecting pipes is equal.
Preferably, described stagnation pressure tube is set in the outside of described static tube.
Preferably, one end of described stagnation pressure tube and described static tube is connected to stagnation pressure induction pipe and is set in the static pressure induction pipe of outside of described stagnation pressure induction pipe, and described stagnation pressure tube and the other end of described static tube are respectively arranged with the Static pressure outlet pipe that stagnation pressure outlet is communicated with perpendicular to described stagnation pressure outlet and with described static tube.
Preferably, described stagnation pressure tube and described static tube are arranged abreast along the direction of the body of described stagnation pressure tube and described static tube.
Preferably, the first end of described stagnation pressure tube and described static tube is connected to stagnation pressure induction pipe and is set in the static pressure induction pipe of outside of described stagnation pressure induction pipe, second end of described stagnation pressure tube is provided with stagnation pressure outlet, the port of the second end of described static tube is connected with the port sealing of described stagnation pressure outlet, and the Static pressure outlet pipe be provided with on the body of the described static tube adjacent with the port of described static tube perpendicular to described stagnation pressure outlet, this Static pressure outlet pipe is communicated with described static tube.
Preferably, described stagnation pressure tube and described static tube are arranged abreast along the direction of the body of described stagnation pressure tube and described static tube.
Preferably, the first end of described stagnation pressure tube and described static tube is connected to stagnation pressure induction pipe and static pressure induction pipe, second end of described stagnation pressure tube and described static tube is connected to stagnation pressure outlet and Static pressure outlet pipe in addition, and described stagnation pressure outlet and described Static pressure outlet pipe are bend pipe.
Pass through technique scheme, the portable air velocity measurement mechanism that the utility model provides is when needs carry or transport, because connecting pipe can bending, thus the portable air velocity measurement mechanism that the utility model provides can fold and shorten its length, therefore be easy to carry or transport, reduce transportation cost and human cost, and portable air velocity measurement mechanism that the utility model provides is when needing to carry out measurement operation, can again launch again, and its rigidity can ensure the reliability of measurement result.
Other features and advantages of the utility model are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide further understanding of the present utility model, and forms a part for instructions, is used from explanation the utility model, but does not form restriction of the present utility model with embodiment one below.In the accompanying drawings:
Fig. 1 is the structural representation of the pitot tube provided according to the utility model.
Fig. 2 is the structural representation of the backing tube provided according to the utility model.
Description of reference numerals
1 pitot tube 2 backing tube
3 stagnation pressure tube 31 stagnation pressure induction pipes
32 stagnation pressure outlet 4 static tubes
41 static pressure induction pipe 42 Static pressure outlet pipes
5 connecting pipe 6 bent portions
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the utility model, is not limited to the utility model.
See figures.1.and.2, the utility model provides a kind of portable air velocity measurement mechanism, this portable air velocity measurement mechanism comprises the static tube 4 of the stagnation pressure tube 3 for the stagnation pressure pressure reduction of measurement gas and the static pressure pressure reduction for measurement gas, and body between stagnation pressure tube 3 and the two ends of static tube 4 is respectively arranged with can the connecting pipe 5 of bending, the caliber being arranged on the connecting pipe 5 on stagnation pressure tube 3 is identical with the caliber of stagnation pressure tube 3, and the caliber being arranged on the connecting pipe 5 on static tube 4 is identical with the caliber of static tube 4.In addition, the connecting pipe 5 that stagnation pressure tube 3 is arranged is relative at least in part with the connecting pipe 5 arranged on static tube 4, and relative length can make the bending of gas velocity measurement device.Certainly, be arranged on connecting pipe on stagnation pressure tube 35 and the connecting pipe 5 be arranged on static tube 4 completely relatively can be arranged along on the length direction of connecting pipe 5, to make stagnation pressure tube 3 and static tube 4 can Complete Synchronization ground bending.In addition, connecting pipe 5 and carry out seamless link respectively between stagnation pressure tube 3 and static tube 4, thus the measuring accuracy ensureing gas velocity measurement device, wherein, preferred connected mode is welding.
In addition, the bending ability of portable air velocity measurement mechanism is determined by many factors such as the length of connecting pipe 5, radius and flexibilities, therefore, the gas velocity measurement device of different size, adopt different length connecting pipe 5, as long as the length of connecting pipe 5 can ensure that gas velocity measurement device can the certain angle of bending, wherein, the most preferred angle of connecting pipe 5 bending is 180 degree.
The portable air velocity measurement mechanism that the utility model provides is when needs carry or transport, because connecting pipe 5 can bending, thus the portable air velocity measurement mechanism that the utility model provides can fold and shorten its length, therefore be easy to carry or transport, reduce transportation cost and human cost, and portable air velocity measurement mechanism that the utility model provides is when needing to carry out measurement operation, can again launch again, and its rigidity can ensure the reliability of measurement result.
Can the connecting pipe 5 of bending can be have metal hose, rubber hose, plastic flexible pipe etc., these flexible pipes all have higher flexibility, repeated flex and flexibility etc., thus are applied to multiple field.But because gas velocity measurement device needs certain rigidity, and a lot of operating mode is the environment of burn into high temperature, thus in the gas velocity measurement device that provides of the utility model connecting pipe 5 using metal hose as preferred material.But the utility model does not limit the material of connecting pipe 5.
In metal hose, most preferred material as connecting pipe 5 is flange-connection stainless steel metal flexible pipe, this is because flange-connection stainless steel metal flexible pipe has plurality of advantages, namely, very flexibly there is good retractility between pitch, the performance of resistance to bending, tension, lateral pressure resistant is strong, can be corrosion-resistant, high temperature resistant, and due to lightweight and relatively can reduce the weight of gas velocity measurement device.Below, the utility model provides a specific embodiment so that the advantage of flange-connection stainless steel metal flexible pipe to be described.
In the embodiment that the utility model provides, gas velocity measurement device selects pitot tube 1, and this pitot tube 1 length is 2100mm, and the diameter of stagnation pressure tube 3 is 10mm, and the diameter of static tube is 6mm, and the aperture of baroport is 1mm.Wherein, from stagnation pressure tube 3 and static tube 4 body middle part on length be set respectively be 300mm and caliber equals the flange-connection stainless steel metal flexible pipe of the caliber of stagnation pressure tube 3 and static tube 4.Now, just pitot tube 1 can be bent into the length of 1000-1100mm, thus make the contraction in length of pitot tube 1 be about half.Meanwhile, the pitot tube 1 of the utility model to the different size model being provided with flange-connection stainless steel metal flexible pipe has carried out performance test respectively, and to verify that the setting of flange-connection stainless steel metal flexible pipe does not affect the measurement performance of pitot tube 1, its test result sees the following form 1:
Table 1
Test result in table 1 is known, be provided with the pitot tube 1 of flange-connection stainless steel metal flexible pipe when measuring, because air-flow is turbulent flow, Reynolds number Re is constant, and the inwall of flange-connection stainless steel metal flexible pipe is smooth metal surface, thus the roughness ε of the tube wall of flange-connection stainless steel metal flexible pipe is identical with the caliber of pitot tube 1 with caliber etc., therefore the on-way resistance of pitot tube and negotiability do not change the impact capacity of opposing blast and transmissibility factor does not also change, thus meet the performance requirement measuring gas velocity completely, the setting at this point demonstrating flange-connection stainless steel metal flexible pipe does not affect the measurement performance of gas velocity measurement device yet, under the portable air velocity measurement mechanism simultaneously making the utility model provide has the prerequisite of good measurement performance, also having can the function of bending.
In addition, as depicted in figs. 1 and 2, described stagnation pressure tube 3 and described static tube 4 comprise bent portion 6 respectively, and bent portion 6 is made up of rigid material, this is in order under the operating mode of complexity, makes bent portion 6 have rigidity and indeformable, to ensure the reliability of the measurement result of gas velocity measurement device.
In addition, in order to enable gas velocity measurement device be folded into shorter length, with reference to Fig. 2, the body between stagnation pressure tube 3 and the two ends of static tube 4 can be provided with multiple spaced connecting pipe 5.The degree that gas velocity measurement device shortens is determined by the quantity of connecting pipe 5 and setting position.And the utility model does not limit quantity and the setting position of connecting pipe 5.
And as preferred embodiment, can arrange with equal spacing between adjacent two connecting pipes 5, when carrying gas velocity measurement device, each folding length can be made equal or similar, can gas velocity measurement device be packed better and be easy to carry like this.Such as, when the quantity of connecting pipe 5 is 2, the length of gas velocity measurement device can shorten to about 1/2, and when the quantity of connecting pipe 5 is 3, the length of gas velocity measurement device can shorten to about 1/3 at most.That is, according to the quantity n of connecting pipe 5, the length of gas velocity measurement device can be folded at most about the 1/n of original length.But it should be noted that at this, the quantity of connecting pipe 5 is unsuitable too many, in order to avoid affect the rigidity of gas velocity measurement device and the accuracy of measurement result can not be ensured.
In addition, with reference to Fig. 1, in the gas velocity measurement device that the utility model provides, stagnation pressure tube 3 can be set in the outside of static tube 4.Particularly, one end of stagnation pressure tube 3 and static tube 4 is connected to stagnation pressure induction pipe 31 and is set in the static pressure induction pipe 41 of outside of stagnation pressure induction pipe 31, the port of stagnation pressure induction pipe 31 is provided with stagnation pressure import, and the tube wall of static pressure induction pipe 41 offers multiple static pressure import equably.In addition, the second end of stagnation pressure tube 3 is provided with stagnation pressure outlet 32, the port of stagnation pressure outlet 32 is provided with stagnation pressure outlet.In addition, the second end and the stagnation pressure outlet 32 of static tube 4 are tightly connected, and particularly, the second end of static tube 4 and the second end of stagnation pressure outlet 32 are tightly connected.Meanwhile, the body of the adjacent static tube 4 of the second end with static tube 4 is provided with the Static pressure outlet pipe 42 perpendicular to stagnation pressure outlet 32, and this Static pressure outlet pipe 42 is communicated with static tube 4, and the port of Static pressure outlet pipe 42 is provided with Static pressure outlet.Wherein, stagnation pressure import, static pressure import, stagnation pressure outlet and Static pressure outlet are all connected to pressure gauge.More specifically, the gas velocity measurement device of this structure can be pitot tube 1.The words of the measuring principle of simple declaration pitot tube 1, stagnation pressure tube 3 is connected with pressure gauge respectively with static tube 4, by stagnation pressure and the static pressure of manometry, and can gasflow mach number be obtained according to Bernoulli equation and energy equation, and then the speed of air-flow can be obtained.
But with reference to Fig. 2, stagnation pressure tube 3 and static tube 4 also can be arranged along the direction of the body of stagnation pressure tube 3 and static tube 4 abreast, and stagnation pressure tube 3 is arranged to be connected centered by axis symmetrically with static tube 4.Particularly, the first end of stagnation pressure tube 3 and static tube 4 is connected to stagnation pressure induction pipe 31 and static pressure induction pipe 41, second end of stagnation pressure tube 3 and static tube 4 is connected to stagnation pressure outlet 32 and Static pressure outlet pipe 42, and wherein stagnation pressure outlet 32 and Static pressure outlet pipe 42 are bend pipe.In addition, be respectively arranged with stagnation pressure import, static pressure import, stagnation pressure outlet and Static pressure outlet at the port of stagnation pressure induction pipe 31, static pressure induction pipe 41, stagnation pressure outlet 32 and Static pressure outlet pipe 42, and be all connected to pressure gauge.The gas velocity measurement device of this structure can be backing tube 2.Backing tube 2 is structurally had any different with pitot tube 1, but measuring principle is similar, is measured stagnation pressure and the static pressure of air-flow exactly, obtain speed according to energy equation by stagnation pressure tube 3 and static tube 4 Bonding pressure meter.
In sum, owing to can the connecting pipe 5 of bending only be arranged on the body of stagnation pressure tube 3 and static tube 4, and to measuring the stagnation pressure import of stagnation pressure and static pressure, static pressure import, stagnation pressure outlet and Static pressure outlet do not produce any impact, substantial impact is not had on the integral rigidity of stagnation pressure tube 3 and static tube 4, therefore, the portable air velocity measurement mechanism that the utility model provides is when needs carry or transport, it can fold and shortens its length and be easy to carry or transport, reduce transportation cost and human cost, when the portable air velocity measurement mechanism that the utility model provides simultaneously needs to carry out measurement operation, can again launch again, and its rigidity can ensure the reliability of measurement result.
Below preferred implementation of the present utility model is described by reference to the accompanying drawings in detail; but; the utility model is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present utility model; can carry out multiple simple variant to the technical solution of the utility model, these simple variant all belong to protection domain of the present utility model.
It should be noted that in addition, each the concrete technical characteristic described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode.In order to avoid unnecessary repetition, the utility model illustrates no longer separately to various possible array mode.
In addition, also can carry out combination in any between various different embodiment of the present utility model, as long as it is without prejudice to thought of the present utility model, it should be considered as content disclosed in the utility model equally.
Claims (10)
1. a portable air velocity measurement mechanism, this portable air velocity measurement mechanism comprises stagnation pressure tube (3) and static tube (4), it is characterized in that, body between described stagnation pressure tube (3) and the two ends of described static tube (4) is respectively arranged with can the connecting pipe (5) of bending, and the described connecting pipe (5) that described stagnation pressure tube (3) is upper to be arranged is relative at least in part with the connecting pipe (5) of the upper setting of described static tube (4).
2. portable air velocity measurement mechanism according to claim 1, is characterized in that, described connecting pipe (5) is metal hose.
3. portable air velocity measurement mechanism according to claim 2, is characterized in that, the material of described metal hose is flange-connection stainless steel metal flexible pipe.
4. portable air velocity measurement mechanism according to claim 1, it is characterized in that, described stagnation pressure tube (3) and described static tube (4) comprise bent portion (6) respectively, and this bent portion (6) is made up of rigid material.
5. portable air velocity measurement mechanism as claimed in any of claims 1 to 4, it is characterized in that, the body between the two ends of described stagnation pressure tube (3) and described static tube (4) is provided with multiple spaced connecting pipe (5).
6. portable air velocity measurement mechanism according to claim 5, is characterized in that, the spacing between adjacent two described connecting pipes (5) is equal.
7. portable air velocity measurement mechanism according to claim 1, is characterized in that, described stagnation pressure tube (3) is set in the outside of described static tube (4).
8. portable air velocity measurement mechanism according to claim 7, it is characterized in that, the first end of described stagnation pressure tube (3) and the first end of described static tube (4) are connected to stagnation pressure induction pipe (31) and are set in the static pressure induction pipe (41) of outside of described stagnation pressure induction pipe (31), second end of described stagnation pressure tube (3) is provided with stagnation pressure outlet (32), second end and the described stagnation pressure outlet (32) of described static tube (4) are tightly connected, and the Static pressure outlet pipe (42) be provided with on the body of the described static tube (4) adjacent with the port of described static tube (4) perpendicular to described stagnation pressure outlet (32), this Static pressure outlet pipe (42) is communicated with described static tube (4).
9. portable air velocity measurement mechanism according to claim 1, it is characterized in that, described stagnation pressure tube (3) and described static tube (4) are arranged abreast along the direction of the body of described stagnation pressure tube (3) and described static tube (4).
10. portable air velocity measurement mechanism according to claim 9, it is characterized in that, the first end of described stagnation pressure tube (3) and described static tube (4) is connected to stagnation pressure induction pipe (31) and static pressure induction pipe (41), second end of described stagnation pressure tube (3) and described static tube (4) is connected to stagnation pressure outlet (32) and Static pressure outlet pipe (42) in addition, and described stagnation pressure outlet (32) and described Static pressure outlet pipe (42) are bend pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520334888.2U CN204832239U (en) | 2015-05-22 | 2015-05-22 | Portable gas velocity measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520334888.2U CN204832239U (en) | 2015-05-22 | 2015-05-22 | Portable gas velocity measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204832239U true CN204832239U (en) | 2015-12-02 |
Family
ID=54689825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520334888.2U Active CN204832239U (en) | 2015-05-22 | 2015-05-22 | Portable gas velocity measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204832239U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106404083A (en) * | 2016-12-08 | 2017-02-15 | 贵州大学 | Pitot tube device suitable for ventilation experiment |
| CN109404163A (en) * | 2018-12-13 | 2019-03-01 | 西安航天动力研究所 | Measure the device and method that scramjet combustor gaseous film control covers interior flow velocity |
| CN110185497A (en) * | 2019-06-29 | 2019-08-30 | 贵州大学 | A kind of seam mining gas flow test warning device |
| CN110470859A (en) * | 2019-09-24 | 2019-11-19 | 西北工业大学 | A method of for the direction tachometric survey of air system interior air-flow |
| CN114812518A (en) * | 2022-05-05 | 2022-07-29 | 武汉大学 | Channel water depth and near-water surface flow velocity measuring device |
-
2015
- 2015-05-22 CN CN201520334888.2U patent/CN204832239U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106404083A (en) * | 2016-12-08 | 2017-02-15 | 贵州大学 | Pitot tube device suitable for ventilation experiment |
| CN109404163A (en) * | 2018-12-13 | 2019-03-01 | 西安航天动力研究所 | Measure the device and method that scramjet combustor gaseous film control covers interior flow velocity |
| CN109404163B (en) * | 2018-12-13 | 2020-08-18 | 西安航天动力研究所 | Device and method for measuring flow velocity in gas film cooling jacket of combustion chamber of ramjet engine |
| CN110185497A (en) * | 2019-06-29 | 2019-08-30 | 贵州大学 | A kind of seam mining gas flow test warning device |
| CN110185497B (en) * | 2019-06-29 | 2021-05-14 | 贵州大学 | Gas flow testing and alarming device for coal seam mining |
| CN110470859A (en) * | 2019-09-24 | 2019-11-19 | 西北工业大学 | A method of for the direction tachometric survey of air system interior air-flow |
| CN110470859B (en) * | 2019-09-24 | 2021-04-20 | 西北工业大学 | Method for measuring direction and speed of airflow in air system |
| CN114812518A (en) * | 2022-05-05 | 2022-07-29 | 武汉大学 | Channel water depth and near-water surface flow velocity measuring device |
| CN114812518B (en) * | 2022-05-05 | 2023-01-03 | 武汉大学 | Channel water depth and near-water surface flow velocity measuring device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204832239U (en) | Portable gas velocity measuring device | |
| CN105590538B (en) | A kind of gas flow measurement experimental provision | |
| Özahi et al. | Simple methods for low speed calibration of hot-wire anemometers | |
| CN103868623B (en) | The measurement apparatus of temperature of liquid and method in a kind of pipeline | |
| CN107607158A (en) | The system of velocity measurement inner axial tube velocity flow profile and flow | |
| CN102749154A (en) | Method, device and energy meter for measuring temperature of fluid medium by ultrasonic wave | |
| Georgiou et al. | Fabrication and calibration of a sub-miniature 5-hole probe with embedded pressure sensors for use in extremely confined and complex flow areas in turbomachinery research facilities | |
| Dobrowolski et al. | A mathematical model of the self-averaging Pitot tube: A mathematical model of a flow sensor | |
| CN107179105A (en) | Flow measurement device | |
| CN102252722B (en) | Three-differential-pressure gas liquid two-phase fluid flow metering device | |
| CN202281781U (en) | Pitot tube flow meter and pitot tube thereof | |
| Hofmann et al. | Experimental and numerical investigation of the gas side heat transfer and pressure drop of finned tubes—part I: experimental analysis | |
| CN101393043A (en) | High frequency response flowmeter and measurement method thereof | |
| CN210834953U (en) | Pitot tube sensor for variable air volume valve | |
| CN209879921U (en) | Pipeline comprehensive experiment system device | |
| CN202171480U (en) | Three-differential-pressure gas and liquid two-phase flow metering device | |
| CN113125800B (en) | Wind speed and direction measuring method based on pitot tube | |
| CN212082473U (en) | Matrix flowmeter | |
| CN207540584U (en) | A kind of integral-type backing tube | |
| Ladjedel et al. | Experimental study of pressure drop reduction on in-line tube bundle using passive control | |
| CN113238074B (en) | Pitot tube wind speed and direction measuring method based on sextant method | |
| Fei et al. | Numerical simulation of multi-path ultrasonic flowmeter: Ultrasonic path error analysis | |
| CN211346933U (en) | Ultrasonic runner rectifier grid honeycomb unit | |
| Gangopadhyay et al. | Flow Investigation inside A Curved Square Duct | |
| CN108225469A (en) | A kind of parallel flow sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |