CN101545918B - Synchronization double imaging cloud base wind measurement method - Google Patents

Synchronization double imaging cloud base wind measurement method Download PDF

Info

Publication number
CN101545918B
CN101545918B CN2009103019738A CN200910301973A CN101545918B CN 101545918 B CN101545918 B CN 101545918B CN 2009103019738 A CN2009103019738 A CN 2009103019738A CN 200910301973 A CN200910301973 A CN 200910301973A CN 101545918 B CN101545918 B CN 101545918B
Authority
CN
China
Prior art keywords
image acquisition
point
acquisition device
cloud
dbc
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.)
Expired - Fee Related
Application number
CN2009103019738A
Other languages
Chinese (zh)
Other versions
CN101545918A (en
Inventor
马舒庆
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CMA Meteorological Observation Centre
Original Assignee
CMA Meteorological Observation Centre
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by CMA Meteorological Observation Centre filed Critical CMA Meteorological Observation Centre
Priority to CN2009103019738A priority Critical patent/CN101545918B/en
Publication of CN101545918A publication Critical patent/CN101545918A/en
Application granted granted Critical
Publication of CN101545918B publication Critical patent/CN101545918B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Abstract

A synchronization double imaging cloud base wind measurement method comprises following steps: setting two image collectors in a distance; shooting the same area of the cloud simultaneously; supposing a point A at the cloud base, finding the vertical projection point D of the point A at the focal plane where an image collector 1 and an image collector 2 are, respectively measuring the included angle DBC between connecting line of points D and B and the baseline BC, and the included angle DCB between the connecting line of points D and C and the baseline BC; computing BD and CD according to the geometry formula and computing the transversal and longitudinal coordinates of the point A at the X axis and Y axis; after interval time t, obtaining the horizontal and vertical coordinates X1 and Y1 of the point D in cloud; computing the wind speed and wind direction values according to the formula. The method has simple measuring steps, accurate measurement result and is widely applied in the fields such as aviation, aerospace and weather.

Description

Synchronization double imaging cloud base wind measurement method
Technical field
The present invention relates to the measuring method of a kind of measuring method of wind speed, particularly a kind of cloud base wind.
Background technology
The measurement of cloud base wind is significant for aerospace field, and cloud base wind has direct influence for the safe flight of aircraft.Traditional measuring wind speed equipment has mechanical anemometer, heat-sensitive type anemoscope, ultrasonic wind speed instrument etc.The wind direction in high-altitude and wind speed often adopt meteorological balloon to measure, and hang the radio signals responder below balloon, calculate wind direction and wind speed on the height of balloon place soon with ground radar again.But all be difficult to be used for the measurement of cloud base wind with upper ground surface and high-altitude wind speed measuring equipment.
Summary of the invention
The invention provides a kind of synchronization double imaging cloud base wind measurement method, solve cloud base wind and be difficult to problems of measurement.
The technical solution adopted for the present invention to solve the technical problems is:
This synchronization double imaging cloud base wind measurement method is characterized in that measuring process is as follows:
Step 1: two image acquisition devices are separated by one apart from being provided with, make two image acquisition devices can photograph the same area of cloud, and the line that obtains the focus C of the focus B of image acquisition device 1 and image acquisition device 2 is baseline BC, two image acquisition device camera lenses are vertically to the sky, and the imaging plane major axis or the minor axis of image acquisition device are parallel with baseline;
Step 2: image acquisition device 1 and image acquisition device 2 are taken the same zone of cloud simultaneously, obtain photo P1 and photo P2 respectively;
Step 3: supposing has A point at image acquisition device 1 and the image acquisition device 2 common cloud bases of taking the district, in photo P1 and photo P2, find the vertical projection point D of A point respectively in image acquisition device 1 and focal plane, image acquisition device 2 place, measure the angle ∠ DBC of D point and B point line and baseline BC respectively, and the angle ∠ DCB of D point and C point line and baseline BC;
Step 4:A and image acquisition device 1 focus B and image acquisition device 2 focus C have constituted triangle ABC, constituted triangle DBC between the vertical projection point D of A and B point and the C point, record between two image acquisition devices apart from BC, and measure ∠ DBC and ∠ DCB from the photo of image acquisition device 1 and image acquisition device 2, calculate BD and CD by geometric formula;
Step 5: with the B point is true origin, calculate the A point respectively X-axis, Y-axis laterally and along slope coordinate,
X＝BD×sin(DBC)，
Y＝BD×COS(DBC)；
Step 6: behind interval time t, obtain level and the vertical coordinate X1 that D is ordered in the cloud, Y1 by the method in the above-mentioned steps 1～5 again;
Step 7: be calculated as follows out wind speed and wind direction value:
Wind speed: V=((X-X1) 2+ (Y-Y1) 2) 0.5/ t
Wind direction: D=arctg ((X-X1)/(Y-Y1)).
Above-mentioned cloud atlas can be visible images collector or infreared imaging device as collector.
Above-mentioned visible images collector can be camera or video camera.
Can calculate BD and CD by following geometric formula in the above-mentioned steps 4,
BD×COS(DBC)+DC×COS(DCB)＝BC；
BD×sin(DBC)＝DC×sin(DCB)。
Beneficial effect of the present invention is as follows:
Synchronization double imaging cloud base wind measurement method of the present invention is to adopt two cameras (baseline) separated by a distance, can be separated by greater than 200 meters.Take same cloud simultaneously, obtain two photo P1 of synchronization and P2, finding picture point A1 and the A2 of a unique point A on two photos of cloud on two photos, on P1, P2, measure respectively photo center (camera optical axis) to the distance of A1 and A2 and with the angle of baseline, calculate X, the Y coordinate of A ground vertical projection D by the principle of three-dimensional triangle.Behind interval time t, obtain X1, the Y1 coordinate of A point ground vertical projection D in the cloud more as stated above.Can get cloud base wind and wind direction by computing formula.The measuring process of this method is comparatively simple, and measurement result is accurate.Solve the problems of measurement of cloud base wind with lower cost, can be widely used in fields such as Aeronautics and Astronautics, meteorology.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the synoptic diagram of embodiment one step 1 and step 2.
Fig. 2 is the synoptic diagram of embodiment one step 3～5.
Reference numeral: 1-image acquisition device 1,2-image acquisition device 2,3-cloud base, 4-imaging plane,
A: the cloud base a bit, B: image acquisition device 1 focus, C: image acquisition device 2 focuses, D:A point are at vertical projection point, E:D point and the X-axis perpendicular line intersection point of image acquisition device 1 and focal plane, image acquisition device 2 place.
Among Fig. 1: W is: image acquisition device 1 and image acquisition device 2 common imaging scopes.
Among Fig. 2: X, Y, Z are coordinate axis.
Embodiment
Embodiment one:
Step 1 is referring to shown in Figure 1: with the setting separated by a distance of two image acquisition devices, make image acquisition device 1 and image acquisition device 2 can photograph the distance of cloud the same area, and obtain baseline BC, BC can be more than 200 meters, B is image acquisition device 1 focus, C is image acquisition device 2 focuses, and two image acquisition device camera lenses are vertically to the sky, and image acquisition device imaging plane major axis or minor axis are parallel with baseline;
Step 2: image acquisition device 1 and image acquisition device 2 are taken the same zone of cloud simultaneously, obtain photo P1 and photo P2 respectively;
Step 3 is referring to shown in Figure 2: supposing has A point at image acquisition device 1 and the image acquisition device 2 common cloud bases of taking the district, in photo P1 and photo P2, find the vertical projection point D of A point respectively in image acquisition device 1 and focal plane, image acquisition device 2 place, measure the angle ∠ DBC of D point and B point line and baseline BC respectively, and the angle ∠ DCB of D point and C point line and baseline BC;
Step 4:A and image acquisition device 1 focus B and image acquisition device 2 focus C have constituted triangle ABC, constituted triangle DBC between the vertical projection point D of A and B point and the C point, record between two image acquisition devices apart from BC, and measure ∠ DBC and ∠ DCB from the photo of image acquisition device 1 and image acquisition device 2, calculate BD and CD by the sine and the cosine law;
BD×COS(DBC)+DC×COS(DCB)＝BC；
BD×sin(DBC)＝DC×sin(DCB)；
Step 5: calculate level and vertical coordinate X, Y that D is ordered,
X＝DE＝BD×sin(DBC)，
Y＝BE＝BD×COS(DBC)；
Step 6: behind interval time t, obtain level and the vertical coordinate X1 that D is ordered in the cloud, Y1 by the method in the above-mentioned steps 1～5 again;
Step 7: be calculated as follows out wind speed and wind direction value:
Wind speed: V=((X-X1) 2+ (Y-Y1) 2) 0.5/ t
Wind direction: D=arctg ((X-X1)/(Y-Y1)).
Above-mentioned cloud atlas is visible images collector or infreared imaging device as collector.The visible images collector is camera or video camera.
Embodiment two: different with embodiment one is, but above-mentioned two also horizontal parallel settings of image acquisition device camera lens optical axis, and image acquisition device imaging plane major axis or minor axis are parallel with baseline.
Embodiment three: different with embodiment one is, above-mentioned two image acquisition device imaging planes are a vertical plane simultaneously also, and two camera lens optical axis become certain angle of cut.

Claims (3)

1. synchronization double imaging cloud base wind measurement method is characterized in that measuring process is as follows:
Step 1: two image acquisition devices are separated by one apart from being provided with, make two image acquisition devices can photograph the same area of cloud, and the line that obtains the focus C of the focus B of image acquisition device 1 and image acquisition device 2 is baseline BC, two image acquisition device camera lenses are vertically to the sky, and the imaging plane major axis or the minor axis of image acquisition device are parallel with baseline;
Step 2: image acquisition device 1 and image acquisition device 2 are taken the same zone of cloud simultaneously, obtain photo P1 and photo P2 respectively;
Step 3: supposing has A point at image acquisition device 1 and the image acquisition device 2 common cloud bases of taking the district, in photo P1 and photo P2, find the vertical projection point D of A point respectively in image acquisition device 1 and focal plane, image acquisition device 2 place, measure the angle ∠ DBC of D point and B point line and baseline BC respectively, and the angle ∠ DCB of D point and C point line and baseline BC;
Step 4:A and image acquisition device 1 focus B and image acquisition device 2 focus C have constituted triangle ABC, constituted triangle DBC between vertical projection point D that A is ordered and B point and the C point, record between two image acquisition devices apart from BC, and measure ∠ DBC and ∠ DCB from the photo of image acquisition device 1 and image acquisition device 2, calculate BD and CD by geometric formula;
Calculate BD and CD by following geometric formula in the above-mentioned steps 4,
BD×COS(∠DBC)+DC×COS(∠DCB)=BC；
BD×sin(∠DBC)=DC×sin(∠DCB)；
Step 5: with the B point is true origin, calculate the A point respectively X-axis, Y-axis laterally and along slope coordinate,
X=BD×sin(∠DBC)，
Y=BD×COS(∠DBC)；
Step 6: behind interval time t, obtain level and the vertical coordinate X1 that D is ordered in the cloud, Y1 by the method in the above-mentioned steps 1～5 again;
Step 7: be calculated as follows out wind speed and wind direction value:
Wind speed: V=((X-X1) 2+ (Y-Y1) 2) 0.5/ t
Wind direction: D=arctg ((X-X1)/(Y-Y1)).
2. according to the described synchronization double imaging cloud base wind measurement method of claim 1, it is characterized in that: above-mentioned two image acquisition devices are visible images collector or infreared imaging device.
3. according to the described synchronization double imaging cloud base wind measurement method of claim 2, it is characterized in that: above-mentioned visible images collector is camera or video camera.
CN2009103019738A 2009-04-29 2009-04-29 Synchronization double imaging cloud base wind measurement method Expired - Fee Related CN101545918B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009103019738A CN101545918B (en) 2009-04-29 2009-04-29 Synchronization double imaging cloud base wind measurement method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009103019738A CN101545918B (en) 2009-04-29 2009-04-29 Synchronization double imaging cloud base wind measurement method

Publications (2)

Publication Number Publication Date
CN101545918A CN101545918A (en) 2009-09-30
CN101545918B true CN101545918B (en) 2011-12-07

Family

ID=41193168

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2009103019738A Expired - Fee Related CN101545918B (en) 2009-04-29 2009-04-29 Synchronization double imaging cloud base wind measurement method

Country Status (1)

Country Link
CN (1) CN101545918B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111289770A (en) * 2020-03-16 2020-06-16 中国水利水电科学研究院 Automatic measurement and control system and method for flow and flow speed of reservoir dam

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101852813B (en) * 2010-05-18 2013-04-10 河海大学 Device and method for measuring silt-settling velocity
CN102507977B (en) * 2011-11-23 2013-06-12 中环天仪（天津）气象仪器有限公司 Wind direction sensor using asymmetrical Gray code disc
CN102565451A (en) * 2011-12-28 2012-07-11 中国航空工业集团公司第六三一研究所 Method for measuring and calculating navigation wind direction and wind speed of general-purpose airplane
CN112730884A (en) * 2020-12-28 2021-04-30 同济大学建筑设计研究院(集团)有限公司 Method and system for determining high-altitude wind speed by adopting imaging means

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4953402A (en) * 1988-08-16 1990-09-04 Tk "Orgtechnika" Wind measuring system (anemorhumbometer)
EP1162447A1 (en) * 2000-01-07 2001-12-12 Keio University Method and apparatus for measuring diameter and distribution of micro bubble and micro liquid drop and optical system for measuring diameter and distribution of micro bubble and micro liquid drop
CN101017178A (en) * 2006-11-15 2007-08-15 中国科学院安徽光学精密机械研究所 Image drifting velocity method for measuring average wind speed and direction of atmosphere
CN101126766A (en) * 2007-09-14 2008-02-20 浙江工业大学 Tri-dimensional wind speed wind direction measuring apparatus based on omnidirectional vision
CN101135697A (en) * 2007-08-31 2008-03-05 浙江工业大学 Intelligent wind speed and wind direction measurement mechanism based on computer visual sense

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4953402A (en) * 1988-08-16 1990-09-04 Tk "Orgtechnika" Wind measuring system (anemorhumbometer)
EP1162447A1 (en) * 2000-01-07 2001-12-12 Keio University Method and apparatus for measuring diameter and distribution of micro bubble and micro liquid drop and optical system for measuring diameter and distribution of micro bubble and micro liquid drop
CN101017178A (en) * 2006-11-15 2007-08-15 中国科学院安徽光学精密机械研究所 Image drifting velocity method for measuring average wind speed and direction of atmosphere
CN101135697A (en) * 2007-08-31 2008-03-05 浙江工业大学 Intelligent wind speed and wind direction measurement mechanism based on computer visual sense
CN101126766A (en) * 2007-09-14 2008-02-20 浙江工业大学 Tri-dimensional wind speed wind direction measuring apparatus based on omnidirectional vision

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JP特开2004-156968A 2004.06.03

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111289770A (en) * 2020-03-16 2020-06-16 中国水利水电科学研究院 Automatic measurement and control system and method for flow and flow speed of reservoir dam

Also Published As

Publication number Publication date
CN101545918A (en) 2009-09-30

Similar Documents

Publication Publication Date Title
CN101545918B (en) Synchronization double imaging cloud base wind measurement method
CN102873523B (en) Device for detecting micro-devices on line during assembly based on micro-vision
CN101545777B (en) Synchronization double imaging lightning positioning method
CN103822631B (en) Localization method and the device of a kind of satellite towards rotor and the combination of optical flow field vision
US20150016690A1 (en) Methods and apparatus for refractive flow measurement
US8649917B1 (en) Apparatus for measurement of vertical obstructions
US20100097460A1 (en) Apparatus for measurement of vertical obstructions
CN105115560B (en) A kind of non-contact measurement method of cabin volume of compartment
CN108156819A (en) For calculating the method for the distance from aircraft to ground target
CN104079916A (en) Panoramic three-dimensional visual sensor and using method
CN204137328U (en) A kind of Micro Aerial Vehicle takes the cradle head mechanism of compare rule orthogonal projection figure fast
JP2011203057A (en) Distance measuring instrument for flying object and flying object position measuring instrument
CN110426178B (en) Wind field measurement method and system based on wake flow tracing
CN104330075B (en) Rasterizing polar coordinate system object localization method
CN111811462A (en) Large-component portable visual ranging system and method in extreme environment
CN110823899A (en) Fault positioning method, device and system
CN103234463A (en) System and method for measuring clearance height of sailing ship
CN203567947U (en) Self stabilizing holder for unmanned plane
CN101545772B (en) Cloud height automatic observation process and set
CN101545934A (en) Optical acoustic thunder and lightning detecting process and detector
CN209728170U (en) A kind of laser irradiation formula GPS coordinate acquisition system
CN112950671A (en) Real-time high-precision parameter measurement method for moving target by unmanned aerial vehicle
CN107037414B (en) Positioning metal ball radar calibration method is imaged
CN204785358U (en) Two dimension angle displacement adapter
CN204341408U (en) A kind of can the aerial device of synchro measure height

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20111207

Termination date: 20210429

CF01 Termination of patent right due to non-payment of annual fee