CN104656165A - Measurement method for wind in air on basis of cellular communication network - Google Patents

Abstract

The invention discloses a measurement method for wind in the air on the basis of a cellular communication network. A cellular communication terminal rising in the sky, more than three ground cellular base stations covering terminals, and a ground data processing terminal are adopted; the cellular communication terminal is carried by a balloon so as to be used as a tracer for the measurement of wind in the air, and during the rising of the cellular communication terminal, the wind in the air is measured in real time by utilizing the positioning function and the data communication function of the base stations of the cellular communication terminal. The method can be realized just by utilizing the balloon carrying a common mobile-phone terminal, so that the hardware cost is low; the coverage of the infrastructure of the cellular communication network is wide, so that the popularization and the application are convenient, and the method can be used as a supplement for the measurement means for wind in the air in the prior art.

Description

A kind of aerial wind measuring method based on cellular communications network

Technical field

The present invention relates to a kind of aerial wind measuring method based on cellular communications network (CCN, Cell Communication Network), it is mainly used in the robotization detection of air weather key element.

Background technology

Aerial wind detection is one of main contents of aerological sounding.Aerial wind be affect Flight Safety, rocket-powered missile is launched and the key factor of cannon attack precision, therefore all have great significance in society and military aspect.At present, the measurement of aerial wind mainly contain based on balloon be tracer rawin, wind surveyed by radio theodolite, GPS surveys wind or the Big Dipper surveys the methods such as wind, wherein, windfinding radar emitting electromagnetic wave, is unfavorable for that wartime is hidden; The survey wind precision of radio theodolite under the condition of the low elevation angle is low; GPS surveys the gps system that wind relies on the U.S., is difficult to wartime ensure reliably working; The Big Dipper is surveyed wind and is greatly developed in recent years, and its precision is higher, coverage rate is also enough wide, but the Big Dipper surveys the normal operation that wind technology depends on dipper system, if once core, base station is impaired, so wind measuring system also will be completely malfunctioning.Therefore need to develop multiple upper air wind measuring means, to ensure the reliability service of aerological sounding and service safeguard work under various conditions.

At present, cellular communications networks is general land covering the whole world and greater coasting area, and the signal of communication between mobile phone and base station is propagated at surface layer, constitutes the network of intensive intertexture.And along with the development of mobile communication technology, based on the satellite-ground link communication of telstar and the vacant lot broadband communications based on ground transmitting base station vertically upward, make to use mobile phone and online to become possibility aboard.Domestic honeycomb signal of communication has extensively covered surface layer with aerial, and this is that technical foundation has been established in the measurement relying on cellular communications networks to carry out upper-level winds.Along with popularizing of smart mobile phone, the functions such as architecture, GPS location, data transmission and network service have become the basic function of mobile phone.Intelligent mobile phone terminal can be located by GPS or location, mobile base station obtains present position information, is transmitted and network communicating function can carry out real-time Transmission by data; And software platform is open, cell-phone function is easy to expansion.On the basis of existing mobile phone terminal, can carry out very easily transforming and expanding, these be provide good infrastructure based on the aerial wind measurement of cellular communications network.

By means of the communication between cellular network base station and mobile phone terminal and positioning function, we propose one and utilize domestic honeycomb communication network (Cell Communication Network) to carry out the method for high-altitude wind measurement.The tracer that the method utilizes cellular communication terminal to measure as aerial wind, in balloon carried terminal uphill process, the architecture function of utilization itself and data communication function carry out real-time measurement to aerial wind.The method can be supplemented as the organic of existing aerial wind measurement means, when the inconvenience such as radio theodolite, GPS/ Big Dipper sounding work maybe cannot work, the cellular communications networks that utilization extensively covers and easily mobile phone terminal carry out the measurement of aerial wind, be suitable at ordinary times and wartime, overseas all can implementing within the border.

Summary of the invention

The object of the invention is: propose a kind of upper wind observation metering method based on domestic honeycomb communication network, utilize the tracer that cellular communication terminal is measured as aerial wind, in balloon carried terminal uphill process, the architecture function of utilization itself and data communication function are measured in real time to aerial wind.

Technical scheme of the present invention is: the upper wind observation metering method that the present invention is based on cellular communications networks, adopts the cellular communication terminal of lift-off, the terrestrial cellular base station (more than 3) covering terminal and ground data processing terminal;

The tracer utilizing balloon to carry cellular communication terminal to measure as aerial wind, in cellular communication terminal uphill process, utilizes the architecture function of cellular communication terminal itself and data communication function to measure in real time aerial wind; Its step is as follows:

(1) balloon carries cellular communication terminal lift-off, can receive the signal of more than 3 terrestrial cellular base stations simultaneously, in balloon moving process, if cellular communication terminal shifts out the scope of some cellular basestations, then be taken over by another cellular basestation;

(2) in cellular communication signal coverage, cellular communication terminal is at t _imoment (1 second, interval) triggered location request, cellular basestation sends positioning request signal earthward, comprises signal sending time t _i, transmitted power P _i, transmission frequency f _i, ground data processing terminal address;

(3) after base station j receives request positioning signal, immediately by the incoming level RSSIj of this signal _i, transmitting time t _i, transmitted power P _i, transmission frequency f _icellular communication terminal or ground data processing terminal is sent to Deng in the lump;

(4) cellular communication terminal or ground data processing terminal utilize incoming level RSSIj _iand signal sending time, transmission frequency and transmitted power P _i, calculate t _ithe positioning request signal that moment sends arrives the spatial loss Δ L during cellular basestation of ground _ji;

(5) according to space free propagation model Δ L (dB) and the transmission frequency f of electric wave _i, calculate t _imoment terminal is relative to the distance d of each base station _ji;

(6) by the positional information of terrestrial cellular base station j: longitude, latitude, sea level elevation be converted to geocentric coordinate (x _j, y _j, z _j);

(7) utilize the coordinate information of each ground cellular basestation (more than 3) and cellular communication terminal to set up system of equations relative to the distance of each base station, solve and obtain t _ithe terminal location P in moment _i(X _i, Y _i, Z _i); Solve the position obtaining communication terminal;

(8) according to terminal location and the situation of movement thereof in each moment, wind direction at that time and air speed value is calculated.

The invention has the beneficial effects as follows: compared with prior art, upper wind observation metering method based on domestic honeycomb communication network proposed by the invention, the cellular communications networks of existing extensive covering is utilized to carry out the measurement of aerial wind, balloon carries common mobile phone terminal and can realize, hardware cost is low, without the need to hardware device in fact except terminal, extremely easy to use, easy to utilize, can supplement as the one of existing aerial wind measurement means.

Accompanying drawing explanation

Fig. 1 is the operating diagram of cellular communications networks high-altitude wind measurement of the present invention;

Embodiment

The tracer that the present invention utilizes cellular communication terminal to measure as aerial wind, in balloon carried terminal uphill process, the architecture function of utilization itself and data communication function are measured in real time to aerial wind.

Embodiment is as follows:

(1) balloon carries cellular communication terminal lift-off, ensures the ground base station quantity more than 3 of energy Received signal strength simultaneously, in the moving process of balloon, if terminal shifts out the scope of some base stations, is then taken over by another base station; Current GPRS or CDMA, the cell layout of ground base station easily realizes this point;

(2) in signal cover, cellular communication terminal was at interval of 1 second t _i(i=0,1,2, Λ) triggered location request, sends request positioning signal, comprises signal sending time t _i, transmitted power P _i, transmission frequency f _i, ground data processing terminal address;

(3) base station j (j>=4) is after receiving request positioning signal, immediately by the incoming level RSSI of this signal _j,i, transmitting time t _i, transmitted power P _i, transmission frequency f _isend to cellular communication terminal or ground data processing terminal together;

(4) cellular communication terminal or ground data processing terminal utilize the incoming level RSSI of each base station _j,i, signal transmitting power P _i, calculate t _ithe positioning request signal that moment sends arrives spatial loss Δ L during each base station _j,i=P _i-RSSI _j,i;

(5) according to space free propagation model Δ L (dB)=32.44+20lgd (the km)+20lgf (MHz) and transmission frequency f of electric wave _i, calculate t _imoment terminal is relative to the distance of each base station

(6) base station position information is converted into geocentric coordinate.

Be example with WGS-84 coordinate, namely initial point overlaps with earth centroid, and X-axis points to the intersection point in 0 ° of geodetic meridian and equator, and the Z axis sensing agreement earth arctic, Y-axis sensing east longitude 90 ° of geodetic meridians and the intersection point in equator, form right-handed system rectangular coordinate.

The then positional information (longitude, latitude, sea level elevation) of base station j be converted to geocentric coordinate (x _j, y _j, z _j):

In formula, N is the radius-of-curvature (m) of the earth, and e is the excentricity of the earth, and a, b are major semi-axis and the minor semi-axis of the earth.

(7) position of cellular communication terminal is calculated.

If end coordinates is P _i(X _i, Y _i, Z _i), separate following system of equations, obtain request location moment t _iterminal location P _i(X _i, Y _i, Z _i).

$\left\{\begin{array}{c}{d}_{1i}=\sqrt{{(X_i-x_1)}^2+{(Y_i-y_1)}^2+{(Z_i-z_1)}^2}\\ d_{2i}=\sqrt{{(X_i-x_2)}^2+{(Y_i-y_2)}^2+{(Z_i-z_2)}^2}\\ d_{3i}=\sqrt{{(X_i-x_3)}^2+{(Y_i-y_3)}^2+{(Z_i-z_3)}^2}\\ d_{4i}=\sqrt{{(X_i-x_4)}^2+{(Y_i-y_4)}^2+{(Z_i-z_4)}^2}\end{array}\right.---\left(2\right)$

(8) calculating of aerial wind is carried out.

Step 1: calculation of wind speed V _k:

In formula, Δ t is the time interval (generally getting 1 second), for balloon is by P _k-1position moves to P _kduring position, the average displacement being parallel to earth arc-shaped surface of generation.

Wherein, θ _kfor balloon is by P _k-1position moves to P _kduring position, the angle of balloon and the earth's core line.

${\mathrm{\θ}}_k=\arccos \frac{X_{(k-1)}{X}_k+Y_{(k-1)}{Y}_k+Z_{(k-1)}{Z}_k}{\sqrt{X_{(k-1)}^2+Y_{(k-1)}^2+Y_{(k-1)}^2}\sqrt{X_k^2+Y_k^2+Y_k^2}}---\left(5\right)$

Step 2: because wind direction is for topocentric coordinate system, therefore needs the geocentric coordinate (X by base station and terminal _k, Y _k, Z _k) be converted to topocentric coordinates (X _k', Y _k', Z _k'), concrete method for transformation is as follows:

Wherein, λ, be respectively longitude, angle of latitude.

Step 3: calculate wind direction G _k:

As Δ X ' > 0:

As Δ X ' < 0, during Δ Y ' >=0:

As Δ X ' < 0, during Δ Y ' < 0:

$G_k=\mathrm{arctg}\frac{{\mathrm{\&Delta;Y}}^{\&prime;}}{{\mathrm{\&Delta;X}}^{\&prime;}}---\left(9\right)$

When Δ X '=0, during Δ Y ' > 0:

G _k＝270 (10)

When Δ X '=0, during Δ Y ' < 0:

G _k＝90 (11)

When Δ X '=0, during Δ Y ' < 0:

G _k=C (quiet wind) (12)

In formula

$\left\{\begin{array}{c}{\mathrm{\&Delta;X}}^{\&prime;}={X_k^{-}}^{\&prime;}-{X_{k-1}^{+}}^{\&prime;}\\ {\mathrm{\&Delta;Y}}^{\&prime;}={Y_k^{-}}^{\&prime;}-{Y_{k-1}^{+}}^{\&prime;}\end{array}\right.---\left(13\right)$

Wherein, be respectively average camber line two-end-point geocentric coordinate corresponding topocentric coordinates.

$\left\{\begin{array}{c}{X}_k^{-}=(\sqrt{X_k^2+Y_k^2+Z_k^2}-\frac{h_k-h_{k-1}}{2})\cos {\mathrm{\&alpha;}}_k\\ Y_k^{-}=(\sqrt{X_k^2+Y_k^2+Z_k^2}-\frac{h_k-h_{k-1}}{2})\cos {\mathrm{\&beta;}}_k\\ Z_k^{-}=(\sqrt{X_k^2+Y_k^2+Z_k^2}-\frac{h_k-h_{k-1}}{2})\cos {\mathrm{\&gamma;}}_k\\ X_{k-1}^{+}=(\sqrt{X_{k-1}^2+Y_{k-1}^2+Z_{k-1}^2}+\frac{h_k-h_{k-1}}{2})\cos {\mathrm{\&alpha;}}_{k-1}\\ Y_{k-1}^{+}=(\sqrt{X_{k-1}^2+Y_{k-1}^2+Z_{k-1}^2}+\frac{h_k-h_{k-1}}{2})\cos {\mathrm{\&beta;}}_{k-1}\\ Z_{k-1}^{+}=(\sqrt{X_{k-1}^2+Y_{k-1}^2+Z_{k-1}^2}+\frac{h_k-h_{k-1}}{2})\cos {\mathrm{\&gamma;}}_{k-1}\end{array}\right.---\left(14\right)$

Direction cosine:

$\left\{\begin{array}{c}\cos {\mathrm{\&alpha;}}_0=\frac{X_0}{\sqrt{X_0^2+Y_0^2+Z_0^2}}\mathrm{\&Lambda;}\cos {\mathrm{\&alpha;}}_k=\frac{X_k}{\sqrt{X_k^2+Y_k^2+Z_k^2}}\\ \cos {\mathrm{\&beta;}}_0=\frac{Y_0}{\sqrt{X_0^2+Y_0^2+Z_0^2}}\mathrm{\&Lambda;}\cos {\mathrm{\&beta;}}_k=\frac{Y_k}{\sqrt{X_k^2+Y_k^2+Z_k^2}}\\ \cos {\mathrm{\&gamma;}}_0=\frac{Z_0}{\sqrt{X_0^2+Y_0^2+Z_0^2}}\mathrm{\&Lambda;}\cos {\mathrm{\&gamma;}}_k=\frac{Z_k}{\sqrt{X_k^2+Y_k^2+Z_k^2}}\end{array}\right.---\left(15\right)$

The foregoing describe ultimate principle of the present invention, principal character and embodiment.For those skilled in the art, under the premise without departing from the principles of the invention, some improvements and modifications are made all in protection scope of the present invention.The protection domain of application claims by claim and equivalently to determine.

Claims (5)

1., based on the upper wind observation metering method of cellular communications networks, it is characterized in that adopting the cellular communication terminal of lift-off, the terrestrial cellular base station (more than 3) covering terminal and ground data processing terminal;

The tracer utilizing balloon to carry cellular communication terminal to measure as aerial wind, in cellular communication terminal uphill process, utilizes the architecture function of cellular communication terminal itself and data communication function to measure in real time aerial wind; Its step is as follows:

(1) balloon carries cellular communication terminal lift-off, can receive the signal of more than 3 terrestrial cellular base stations simultaneously, in balloon moving process, if cellular communication terminal shifts out the scope of some cellular basestations, then be taken over by another cellular basestation;

(2) in cellular communication signal coverage, cellular communication terminal is at t _imoment (1 second, interval) triggered location request, cellular basestation sends positioning request signal earthward, comprises signal sending time t _i, transmitted power P _i, transmission frequency f _i, or comprise the address of ground data processing terminal again;

(3) after base station j receives request positioning signal, immediately by the incoming level RSSIj of this signal _i, transmitting time t _i, transmitted power P _i, transmission frequency f _icellular communication terminal or ground data processing terminal is sent to Deng in the lump;

(4) cellular communication terminal or ground data processing terminal utilize incoming level RSSIj _iand signal sending time, transmission frequency and transmitted power P _i, calculate t _ithe positioning request signal that moment sends arrives the spatial loss Δ L during cellular basestation of ground _ji;

(5) according to space free propagation model Δ L (dB) and the transmission frequency f of electric wave _i, calculate t _imoment terminal is relative to the distance d of each base station _ji;

(6) by the positional information of each ground cellular basestation: longitude, latitude, sea level elevation be converted to geocentric coordinate (x _j, y _j, z _j);

(7) utilize the coordinate information of each ground cellular basestation (more than 3) and cellular communication terminal to set up system of equations relative to the distance of each base station, solve and obtain t _ithe terminal location P in moment _i(X _i, Y _i, Z _i); Solve the position obtaining communication terminal;

(8) according to terminal location and the situation of movement thereof in each moment, wind direction at that time and air speed value is calculated.

2., based on the upper wind observation metering method of cellular communications networks, it is characterized in that described space free propagation model Δ L (dB)=32.44+20lgd (the km)+20lgf (MHz) and transmission frequency f utilizing electric wave _i, calculate t _imoment terminal is relative to the distance of each base station

3., based on the upper wind observation metering method of cellular communications networks, it is characterized in that step base station position information being converted into geocentric coordinate:

Be example with WGS-84 coordinate, namely initial point overlaps with earth centroid, and X-axis points to the intersection point in 0 ° of geodetic meridian and equator, and the Z axis sensing agreement earth arctic, Y-axis sensing east longitude 90 ° of geodetic meridians and the intersection point in equator, form right-handed system rectangular coordinate.

The then positional information (longitude, latitude, sea level elevation) of base station j be converted to geocentric coordinate (x _j, y _j, z _j):

In formula, N is the radius-of-curvature (m) of the earth, and e is the excentricity of the earth, and a, b are major semi-axis and the minor semi-axis of the earth.

4., based on the upper wind observation metering method of cellular communications networks, it is characterized in that the step of the position calculating cellular communication terminal:

If end coordinates is P _i(X _i, Y _i, Z _i), separate following system of equations, obtain request location moment t _iterminal location P _i(X _i, Y _i, Z _i).

。

5., based on the upper wind observation metering method of cellular communications networks, it is characterized in that the calculating carrying out aerial wind:

Step 1: calculation of wind speed V _k:

In formula, Δ t is the time interval (generally getting 1 second), for balloon is by P _k-1position moves to P _kduring position, the average displacement being parallel to earth arc-shaped surface of generation;

Wherein, θ _kfor balloon ball is by P _k-1position moves to P _kduring position, the angle of balloon and the earth's core line;

Step 2: because wind direction is for topocentric coordinate system, therefore needs geocentric coordinate (X _k, Y _k, Z _k) be converted to topocentric coordinates (X _k', Y _k', Z _k'), concrete method for transformation is as follows:

Step 3: calculate wind direction G _k:

As Δ X ' > 0:

As Δ X ' < 0, during Δ Y ' >=0:

As Δ X ' < 0, during Δ Y ' < 0:

When Δ X '=0, during Δ Y ' > 0:

G _k＝270 (10)

When Δ X '=0, during Δ Y ' < 0:

G _k＝90 (11)

When Δ X '=0, during Δ Y ' < 0:

G _k=C (quiet wind) (12)

In formula

Wherein, be respectively average camber line two-end-point geocentric coordinate corresponding topocentric coordinates;

Direction cosine: