CN117589834A - Airborne relative humidity measurement method - Google Patents
Airborne relative humidity measurement method Download PDFInfo
- Publication number
- CN117589834A CN117589834A CN202311431678.0A CN202311431678A CN117589834A CN 117589834 A CN117589834 A CN 117589834A CN 202311431678 A CN202311431678 A CN 202311431678A CN 117589834 A CN117589834 A CN 117589834A
- Authority
- CN
- China
- Prior art keywords
- temperature
- relative humidity
- static
- humidity
- water vapor
- 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.)
- Pending
Links
- 238000000691 measurement method Methods 0.000 title claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical class O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 230000003068 static effect Effects 0.000 claims abstract description 36
- 238000011084 recovery Methods 0.000 claims abstract description 27
- 238000001514 detection method Methods 0.000 claims abstract description 18
- 238000013461 design Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 16
- 230000000903 blocking effect Effects 0.000 claims description 15
- 230000000979 retarding effect Effects 0.000 claims description 11
- 238000012937 correction Methods 0.000 claims description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 239000003990 capacitor Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 229910052697 platinum Inorganic materials 0.000 claims description 3
- 239000002344 surface layer Substances 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 14
- 239000003570 air Substances 0.000 description 70
- 238000000926 separation method Methods 0.000 description 6
- 239000010410 layer Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
- G01N27/223—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance for determining moisture content, e.g. humidity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/18—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
Landscapes
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biochemistry (AREA)
- Immunology (AREA)
- Electrochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The application provides an airborne relative humidity measurement method, which belongs to the technical field of airborne weather detection, and specifically comprises the steps of installing a measurement device on an aircraft design position, collecting airflow at the current position by the measurement device, measuring the temperature and humidity of the collected airflow, wherein the temperature measured by the measurement device is the total atmospheric temperature, and the humidity measured by the measurement device is dynamic relative humidity; acquiring the total flight temperature, the static temperature and the Mach number from an aircraft atmospheric data system; calculating a recovery temperature according to the total temperature of the atmosphere and the recovery coefficient; calculating saturated water vapor pressure corresponding to the recovery temperature and saturated water vapor pressure corresponding to the static temperature; and comprehensively calculating according to the static temperature, the recovery temperature, the specific heat of the dry air under constant pressure, the specific heat of the dry air under constant volume, the saturated water vapor pressure corresponding to the recovery temperature, the saturated water vapor pressure corresponding to the static temperature and the dynamic relative humidity to obtain the static relative humidity. Through the processing scheme of this application, improve the measurement accuracy of the relative humidity of flight environment.
Description
Technical Field
The application relates to the field of airborne weather detection, in particular to an airborne relative humidity measurement method.
Background
The relative humidity refers to the ratio of the actual water vapor pressure to the saturated water vapor pressure in the air at a certain temperature, represents the saturation degree of the actual air distance, and has urgent requirements for accurate measurement of the relative humidity in the fields of aircraft weather detection, aircraft artificial influence weather, commercial aircraft route weather forecast and the like, but at present, a relatively mature solution is lacking. At present, an AIMMS series airborne comprehensive meteorological parameter measurement system of Aventech company in Canada is adopted in the field of artificial influence weather in China, the system is hung below a wing, a humidity sensor is installed in a tail cavity, air flow enters from an air inlet at the tail of the cavity in the flying process, flows out of an air outlet on the surface of the cavity after flowing through the surface of the humidity sensor in the cavity, the output value of the humidity sensor is directly the relative humidity of the flying environment, the influence of air adiabatic compression on the relative humidity measurement in the flying process is not considered, the relative humidity value obtained by direct measurement is not corrected, the measured value in the flying process is greatly different from a true value, and the appearance of the system is in the form of a pod and is not suitable for being installed on a commercial aircraft for large-scale popularization and application.
Disclosure of Invention
In view of this, the application provides an airborne relative humidity measurement method, which solves the problems in the prior art and improves the measurement accuracy of the relative humidity of the flying environment.
The method for measuring the airborne relative humidity adopts the following technical scheme:
an on-board relative humidity measurement method comprising the steps of:
the measuring device is arranged at the design position of the aircraft and comprises a shell, a temperature sensor and a humidity sensor, wherein an air inlet, a pneumatic blocking cavity, a first air outlet channel, a detection channel and a second air outlet channel are arranged in the shell;
the measuring device collects the air flow at the current position, measures the temperature and humidity of the collected air flow, the temperature measured by the measuring device is the total atmospheric temperature TAT, and the humidity measured by the measuring device is the dynamic relative humidity RH D ；
Acquiring an air total temperature TAT, a static temperature SAT and a Mach number Ma from an air data system of the aircraft;
calculating a recovery temperature DRT according to the total atmospheric temperature TAT and the recovery coefficient;
calculating saturated water vapor pressure Ew (DRT) corresponding to the recovery temperature and saturated water vapor pressure Ew (SAT) corresponding to the static temperature;
according to the static temperature SAT, the recovery temperature DRT, the specific heat of the dry air under constant pressure, the specific heat of the dry air under constant volume, the saturated water vapor pressure Ew (DRT) corresponding to the recovery temperature, the saturated water vapor pressure Ew (SAT) corresponding to the static temperature and the dynamic relative humidity RH D Comprehensively calculating to obtain the static relative humidity RH S 。
Optionally, the distance between the air inlet of the measuring device and the aircraft skin is in the range of 3-10 cm.
Optionally, a plurality of groups of air holes communicated with the outside are formed in the side wall of the pneumatic blocking cavity, and the air holes are used for discharging air of the surface layer of the pneumatic blocking cavity.
Optionally, the length direction of the detection channel is perpendicular to the air inlet direction of the air inlet.
Optionally, the temperature sensor is a platinum resistor.
Optionally, the humidity sensitive body of the humidity sensor is a high molecular humidity sensitive capacitor.
Optionally, according to the static temperature SAT, the recovery temperature DRT, the drying air under constant pressureSpecific heat of air, specific heat of dry air under constant volume, saturated water vapor pressure Ew (DRT) corresponding to recovery temperature, saturated water vapor pressure Ew (SAT) corresponding to static temperature, dynamic relative humidity RH D Comprehensively calculating to obtain the static relative humidity RH S The method comprises the following steps:
an adiabatic compression correction amount a is calculated,wherein n is a specific heat value;
calculate the saturated water vapor pressure Ew (DRT) correction component B,
calculation of static relative humidity RH S ，RH s ＝A·B·RH D 。
In summary, the present application includes the following beneficial technical effects:
the water-vapor separation measuring device is adopted, the relative characteristics of the water-vapor separation shell are quantitatively obtained through wind tunnel tests and the like, and more accurate basis is provided for introducing total temperature and static temperature to correct airborne relative humidity measurement, so that the measured flying environment relative humidity is more accurate and reliable.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a measuring device according to the present application;
fig. 2 is a flow chart of the measurement method of the present application.
Reference numerals illustrate: 1. an air inlet; 2. a pneumatic blocking chamber; 3. a first outlet channel; 4. a detection channel; 5. a second outlet channel; 6. and a temperature and humidity sensor.
Detailed Description
Embodiments of the present application are described in detail below with reference to the accompanying drawings.
Other advantages and effects of the present application will become apparent to those skilled in the art from the present disclosure, when the following description of the embodiments is taken in conjunction with the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. The present application may be embodied or carried out in other specific embodiments, and the details of the present application may be modified or changed from various points of view and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
It is noted that various aspects of the embodiments are described below within the scope of the following claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the present application, one skilled in the art will appreciate that one aspect described herein may be implemented independently of any other aspect, and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. In addition, such apparatus may be implemented and/or such methods practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.
It should also be noted that the illustrations provided in the following embodiments merely illustrate the basic concepts of the application by way of illustration, and only the components related to the application are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.
In addition, in the following description, specific details are provided in order to provide a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects may be practiced without these specific details.
The embodiment of the application provides an airborne relative humidity measurement method.
As shown in fig. 1 and 2, an on-board relative humidity measurement method includes:
the measuring device is arranged at the aircraft design position and comprises a shell, a temperature sensor and a humidity sensor, wherein an air inlet 1, a pneumatic blocking cavity 2, a first air outlet channel 3, a detection channel 4 and a second air outlet channel 5 are arranged in the shell, one end of the pneumatic blocking cavity 2 is communicated with the air inlet 1, the other end of the pneumatic blocking cavity 2 is communicated with the first air outlet channel 3, the air inlet 1, the pneumatic blocking cavity 2 and the first air outlet channel 3 are sequentially arranged along the air inlet direction, one end of the detection channel 4 is communicated with the middle part of the pneumatic blocking cavity 2, the other end of the detection channel 4 is communicated with the second air outlet channel 5, the temperature sensor and the humidity sensor are positioned in the detection channel 4, air flow enters the pneumatic blocking cavity 2 from the air inlet 1, liquid, solid and partial air flow entering the pneumatic blocking cavity 2 enter the first air outlet channel 3 under the inertia effect and are discharged, partial air in the pneumatic blocking cavity 2 enters the detection channel 4 after being deflected, and the air entering the detection channel 4 enters the second air outlet channel 5 after passing through the temperature sensor and the humidity sensor;
the measuring device collects the air flow at the current position, and measures the temperature and the humidity of the collected air flow, the temperature measured by the measuring device is the total atmospheric temperature TAT, and the humidity measured by the measuring device is the dynamic relative humidity RHD;
acquiring an air total temperature TAT, a static temperature SAT and a Mach number Ma from an air data system of the aircraft;
calculating a recovery temperature DRT according to the total atmospheric temperature TAT and the recovery coefficient;
calculating saturated water vapor pressure Ew (DRT) corresponding to the recovery temperature and saturated water vapor pressure Ew (SAT) corresponding to the static temperature;
according to the dry air ratio under constant pressure, the static temperature SAT, the recovery temperature DRT and the recovery temperature DRTSpecific heat of hot and constant-volume dry air, saturated water vapor pressure Ew (DRT) corresponding to recovery temperature, saturated water vapor pressure Ew (SAT) corresponding to static temperature and dynamic relative humidity RH D Comprehensively calculating to obtain the static relative humidity RH S 。
The distance between the air inlet 1 of the measuring device and the aircraft skin is 3-10 cm. In a specific embodiment, the air inlet 1 is mounted 7 cm from the aircraft skin, and the air sampling takes place outside the local boundary of the aircraft (thickness of about 3 cm), so that contamination disturbances which may come from the aircraft skin are avoided. The measuring device of this application when gathering the air current, the air current gets into pneumatic retardation chamber 2 from air inlet 1, and air current speed reduces gradually, and the air current that gets into in the pneumatic retardation chamber 2 includes air, liquid water droplet, ice crystal, steam and impurity, and liquid water droplet, ice crystal and most steam and impurity can get into behind the first passageway 3 of giving vent to anger under inertial action in the pneumatic retardation chamber 2 and discharge, and clean air in the pneumatic retardation chamber 2 gets into detection passageway 4 through deflecting, gets into and discharges after detection passageway 4's air gets into second passageway 5 of giving vent to anger through temperature sensor and humidity transducer, and temperature sensor and humidity transducer acquire parameters. Wherein, the length direction of the detection channel 4 is perpendicular to the air inlet direction of the air inlet 1. The clean air in the pneumatic block chamber 2 is deflected by 90 deg. and enters the detection channel 4.
In the measuring device, the temperature sensor is a platinum resistor, the humidity sensor is a high molecular polymer based on a thin film technology, and consists of a water active polymer film, and is used as a dielectric medium applied between two electrodes on a glass substrate, the sensor responds to the change of relative humidity instead of the absolute humidity in ambient air, and a humidity sensitive body of the humidity sensor is a high molecular humidity sensitive capacitor, so that the precision is high, the sensitivity is high, and the extremely small humidity change can be measured; the response speed is high, the change of humidity in the environment can be timely detected, and the timeliness of the system is ensured; the stability is strong, the anti-interference performance and the temperature stability are good, and the interference of interference signals can be effectively avoided; the device has the advantages of small volume, economic price and good product interchangeability, and is very suitable for measuring the relative humidity of the flying environment by being integrated in the water-vapor separation device. A small part of the air flow contacts the temperature sensor and the humidity sensor after turning right angles, so that sensitive bodies of the temperature sensor and the humidity sensor are protected from dust, water and particles. The temperature sensor and the humidity sensor are integrated together to form a temperature and humidity sensor 6 in the present application.
The side wall of the pneumatic blocking cavity 2 is provided with a plurality of groups of air holes communicated with the outside, and the air holes are used for discharging air of the surface layer of the pneumatic blocking cavity 2. The structure of the pneumatic retarding cavity 2 adopts a boundary layer control technology, a plurality of groups of small holes communicated with the outside atmosphere are formed in the side wall of the retarding chamber, in the flying process, the flow velocity in the pneumatic retarding cavity 2 is reduced, the pressure is increased, the air of the boundary layer in the pneumatic retarding cavity 2 can be discharged out of the pneumatic retarding cavity 2 by utilizing the pressure difference between the inside and the outside of the pneumatic retarding cavity 2, the thickness of the boundary layer in the pneumatic retarding cavity 2 is ensured to be minimum, and the air flow in the center of the pneumatic retarding cavity 2 can flow to the positions of a temperature sensor and a humidity sensor along the pneumatic retarding cavity 2 without air flow separation. Meanwhile, the influence of temperature boundary layer heat transfer on temperature and humidity measurement is reduced.
According to the static temperature SAT, the recovery temperature DRT, the specific heat of the dry air under constant pressure, the specific heat of the dry air under constant volume, the saturated water vapor pressure Ew (DRT) corresponding to the recovery temperature, the saturated water vapor pressure Ew (SAT) corresponding to the static temperature and the dynamic relative humidity RH D Comprehensively calculating to obtain the static relative humidity RH S The method comprises the following steps:
an adiabatic compression correction amount a is calculated,wherein n is a specific heat value;
calculate the saturated water vapor pressure Ew (DRT) correction component B,
calculation of static relative humidity RH S ，RH s ＝A·B·RH D 。
The application relates to the dynamic relative humidity RH obtained by direct measurement D The static relative humidity RH can be obtained only by correcting the total temperature and the static temperature S 。
The water-vapor separation measuring device is adopted, the relative characteristics of the water-vapor separation shell are quantitatively obtained through wind tunnel tests and the like, and more accurate basis is provided for introducing total temperature and static temperature to correct airborne relative humidity measurement, so that the measured flying environment relative humidity is more accurate and reliable.
The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present application should be covered in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (7)
1. An on-board relative humidity measurement method, comprising the steps of:
the measuring device is arranged at the design position of the aircraft and comprises a shell, a temperature sensor and a humidity sensor, wherein an air inlet, a pneumatic blocking cavity, a first air outlet channel, a detection channel and a second air outlet channel are arranged in the shell;
the measuring device collects the air flow at the current position, measures the temperature and humidity of the collected air flow, the temperature measured by the measuring device is the total atmospheric temperature TAT, and the humidity measured by the measuring device is the dynamic relative humidity RH D ；
Acquiring an air total temperature TAT, a static temperature SAT and a Mach number Ma from an air data system of the aircraft;
calculating a recovery temperature DRT according to the total atmospheric temperature TAT and the recovery coefficient;
calculating saturated water vapor pressure Ew (DRT) corresponding to the recovery temperature and saturated water vapor pressure Ew (SAT) corresponding to the static temperature;
according to the static temperature SAT, the recovery temperature DRT, the specific heat of the dry air under constant pressure, the specific heat of the dry air under constant volume, the saturated water vapor pressure Ew (DRT) corresponding to the recovery temperature, the saturated water vapor pressure Ew (SAT) corresponding to the static temperature and the dynamic relative humidity RH D Comprehensively calculating to obtain the static relative humidity RH S 。
2. The method of claim 1, wherein the measuring device has an air inlet and an aircraft skin distance in the range of 3-10 cm.
3. The method for measuring the airborne relative humidity according to claim 1, wherein a plurality of groups of air holes communicated with the outside are formed in the side wall of the pneumatic retarding chamber, and the air holes are used for discharging air of the surface layer of the pneumatic retarding chamber.
4. The method of claim 1, wherein the length direction of the detection channel is perpendicular to the intake direction of the intake port.
5. The method of claim 1, wherein the temperature sensor is a platinum resistor.
6. The method of claim 1, wherein the humidity sensitive body of the humidity sensor is a polymer humidity sensitive capacitor.
7. The method for measuring the relative humidity on board of claim 1, whereinAccording to the static temperature SAT, the recovery temperature DRT, the specific heat of the dry air under constant pressure, the specific heat of the dry air under constant volume, the saturated water vapor pressure Ew (DRT) corresponding to the recovery temperature, the saturated water vapor pressure Ew (SAT) corresponding to the static temperature and the dynamic relative humidity RH D Comprehensively calculating to obtain the static relative humidity RH S The method comprises the following steps:
an adiabatic compression correction amount a is calculated,wherein n is a specific heat value;
calculate the saturated water vapor pressure Ew (DRT) correction component B,
calculation of static relative humidity RH S ，RH s ＝A·B·RH D 。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311431678.0A CN117589834A (en) | 2023-10-31 | 2023-10-31 | Airborne relative humidity measurement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311431678.0A CN117589834A (en) | 2023-10-31 | 2023-10-31 | Airborne relative humidity measurement method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117589834A true CN117589834A (en) | 2024-02-23 |
Family
ID=89917317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311431678.0A Pending CN117589834A (en) | 2023-10-31 | 2023-10-31 | Airborne relative humidity measurement method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117589834A (en) |
-
2023
- 2023-10-31 CN CN202311431678.0A patent/CN117589834A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4804393B2 (en) | Ducted fan air data system | |
| CN101750514B (en) | Wind speed and direction real-time measuring method and device of high-altitude sky-parking aircraft | |
| US10180077B2 (en) | Moving-vane angle of attack probe | |
| US7628359B2 (en) | Method and apparatus for detecting conditions conducive to ice formation | |
| US7150560B2 (en) | Device and method for determining total temperature for aircraft | |
| US20080159354A1 (en) | Mobile temperature sensor | |
| CN114676560B (en) | Cloud and mist parameter calculation and ice shape prediction method and medium based on optical fiber icing detection | |
| CN113899663B (en) | MVD (mechanical vapor recompression) measuring method for complex icing cloud mist in large icing wind tunnel | |
| CN105890804B (en) | A method of it improving temperature sensor and measures total airflow temperature precision | |
| CN108195510A (en) | A kind of hot air wind tunnel calibration method of hot diaphragm type shear stress sensor | |
| Sun et al. | A cylindrical vehicle-mounted anemometer based on 12 pressure sensors—Principle, prototype design, and validation | |
| US7185538B2 (en) | Methods and systems for sensing air vehicle airspeed | |
| Liu et al. | A directional cylindrical anemometer with four sets of differential pressure sensors | |
| CN109507068B (en) | A kind of charged amount detecting device of particulate matter and detection method | |
| Beeler et al. | Flight techniques for determining airplane drag at high Mach numbers | |
| CN117589834A (en) | Airborne relative humidity measurement method | |
| Zhu et al. | A low-cost flexible hot-film sensor system for flow sensing and its application to aircraft | |
| Zhu et al. | Flexible micro flow sensor for micro aerial vehicles | |
| CN114757109B (en) | Method and system for testing relation between internal and external icing parameters of air inlet channel | |
| CN116499692A (en) | Wind tunnel flow velocity real-time measurement method and device | |
| CN114778887A (en) | Unmanned aerial vehicle wind measurement method and device based on improved triangular vector model | |
| Strunin et al. | Response properties of atmospheric turbulence measurement instruments using Russian research aircraft | |
| RU2287140C2 (en) | Aerodynamic model of aircraft with air-reactive engine for measuring external resistance | |
| Simmons et al. | Wind Tunnel Tests of a Pitot-Static Tube Array to Estimate Wind Velocity | |
| CN111003175A (en) | Air inlet processing method of atmospheric environment monitoring unmanned aerial vehicle |
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 |