CN104634996A - Wind detecting method and wind detecting system based on Beidou satellite communication - Google Patents

Abstract

The invention discloses a wind detecting method and a wind detecting system based on Beidou satellite communication, belongs to the field of the preliminary wind detection of a wind power industry, and mainly solves the problem of the unattended remote measurement for wind resource of a real-time collection system, a transmission system, a processing system, a display system, a storage system and the like of the high-quality continental and offshore wind detecting tower wind power resource information. The wind detecting method comprises the steps: acquiring various resource information of a position on which a wind detecting device is positioned by utilizing the wind detection device; integrating the resource information by utilizing a serial port server; satisfying the transmission requirement of the Beidou satellite communication by utilizing a data compression algorithm; further guaranteeing the safety of a signal source by utilizing a self-defined encryption algorithm; guaranteeing the safety and reliability of the information transmission by utilizing a Beidou information transmission handshaking mechanism; establishing a platform by utilizing a Beidou satellite communication system, completing the wind detection information remote transmission of the wind detecting tower so as to satisfy the requirements of different regions. The method and the system have the advantages of wind detection information transmission real-time property, safety, reliability and the like and are suitable for safe and reliable data transmission in the region covered by the Beidou system.

Description

A kind of wind detection method based on Beidou satellite communication and system

Technical field

The communication and time service, the wind-powered electricity generation industry that the present invention relates to Beidou satellite navigation system survey wind technical field, particularly a kind of wind detection method based on Beidou satellite communication and system early stage.

Background technology

The land wind-powered electricity generation exploitable deposit of China is 2.5 hundred million kilowatts, marine site wind-powered electricity generation exploitable deposit between seawater depth of water 2m to 15m is 7.5 hundred million kilowatts, at sea, particularly the depth of water is less than the coastal waters of 15m to the large-scale development potentiality of China's wind-powered electricity generation, especially from now on decades Wind Power Development direction.The current Construction of Wind Power by land of China have accumulated rich experience, but marine wind electric field construction aspect is just at the early-stage.First exploitation wind-powered electricity generation will be assessed wind-resources, the most direct method obtaining wind resource data sets up anemometer tower on land or sea exactly, carry out wind energy turbine set and survey wind early stage, this is comparatively large on impacts such as project Unit Selection, microcosmic structure, generated energy, is one of most important previous work of Wind Power Generation.

The land anemometer tower that current China builds is more, but offshore anemometer tower is less.The information transmission mode adopted includes the multiple means such as spider lines, wireless short wave, mobile communication, but all there is safe hidden danger, and investment is comparatively large, and survey wind for sea, above problem is particularly outstanding.China have developed the Beidou satellite navigation and positioning system with independent intellectual property right, has the space fundamental facilities of oneself, is the autonomous construction of China, independent operating, the GPS (Global Position System) shared with other satellite navigation systems compatibilities of the world.At present, this system is at original active location, two-way timing and know on message communication service infrastructure, and the most area started to Asia-Pacific formally provides the services such as continuous passive location, navigation, communication, time service.

Since the open civil area of big-dipper satellite, have in national economy every profession and trade and used widely, related to the numerous areas such as communications and transportation, water conservancy, meteorology, shipping, forest fire protection and deep-sea fishing.However, on State-level, use Beidou satellite communication to carry out survey wind data transmission aspect and still belong to blank.

The land that forms of method and system that the present invention proposes or each anemometer tower system at sea and land control center, client, have that scale of investment is little, networking convenient, construction period short, safe and reliable to operation degree advantages of higher.

Summary of the invention

The object of the present invention is to provide a kind of wind detection method based on Beidou satellite communication and system, to solve the collect and transmit problem of the resource information of remote districts or offshore anemometer tower.

For above-mentioned purpose, example of the present invention adopts following technical scheme:

Based on a wind detection method for Beidou satellite communication, described method comprises the steps:

The method surveying wind devices measuring wind is as follows:

Survey wind devices measurement ultrasound wave and carry out calculation of wind speed size in the sound movement velocity in three directions respectively, respectively with the U having symbol, V, and W represents, symbol represents polarity:

As shown in Figure 4, calculate the time that N sensor transmits to sensor ultrasonic pulse, and with sensor to N sensor transmissions time compared with, draw the mistiming.Equally, the time of time from W to E and E to W is also compared.(N=north, S=south, E=east, W=west):

The speed calculation method of wind was calculated by the sound aerial travel-time, and formula is:

TS1=C1/403 (temperature of TS1=sound wave, C1=wind speed);

Notice that formula does not consider the impact of humidity.

The definition of U, V, W axle

+ U be defined as to show at figure the north to.

The definition of+V is counterclockwise 90 degree of directions from the direction of N.

+ W is defined as perpendicular to UV plane direction upwards.

6 survey wind devices by the wind speed information that collects with specific data layout by 6 422 Serial Port Transmission to serial server, serial server is to data analysis, calculating, process, compression, encryption etc.

Surveying wind devices data layout is: " device numbering, U, V, W, M.T, A r n ".

We specify that all survey wind devices data all use character representation, adopt decimal system ASSIC code to encode in transmitting procedure.

Serial server calculates data, and computing method are:

According to the data be deposited with in each queue, we calculate wind speed mean value avg per minute, variances sigma, wind speed maximal value max and wind speed minimum value min respectively, and every output data precision requires to reach 2 significant digits.

Mean value calculation formula: $\mathrm{avg}=\frac{\underset{i=1}{\overset{n}{\mathrm{\Σ}}}\mathrm{vi}}{N}$

Variance computing formula: $\mathrm{\σ}=\sqrt{\frac{{{\mathrm{\Σ}}^n}_{i=1}{(v_i-\mathrm{avg})}^2}{n-1}}$

Wherein vi is the wind speed in all directions of i second in certain minute.

Method for processing abnormal data:

Can run into various abnormal data at the scene, cause the reason of these abnormal datas may be abnormal from physical equipment work, also may be because running software is abnormal.

According to the form of expression of the abnormal data in per minute abnormal data part abnormal data and whole abnormal data.

Part abnormal data, namely data only have part to occur junk data, and other data are normal, junk data need be rejected when giving computing unit data in this case, slow down in data counts variable and go the number of junk data, then give computing unit and calculate.

Whole abnormal data is divided into again whole misdata and whole assigning null data, and in whole misdata refers to minute, all data collected are all junk datas, causes the reason of this situation may be because anemoscope duty is abnormal etc.During this time these data all should be rejected.

Finally data are encrypted, are sent to the Big Dipper by 232 serial ports.

Data are before being sent to Beidou communication equipment, and serial server first stores a data in the data storage card of self, and when serial server first time works on power, data can be stored success confirmation message and transfer to Beidou communication equipment.

Beidou communication equipment have employed handshake mechanism when sending data, ensure that data communication success ratio reaches more than 98%.

Survey wind data by Beidou communication system, transfer to data receiver center, the survey wind data received is shown with 3D graphical method by we, specific as follows:

3D figure represents the state of wind speed, and the upper plan sectional view of figure is oval, and the coordinate of display point is M point place coordinate.Blower fan is in the sectional centre position of wind direction to select M point coordinate better to show, as shown in Figure 5.

The coordinate of this display point M asks calculation:

Oval length half axial ratio:

The plane included angle of M point and A axle:

M point x coordinate is asked in reasoning: $\frac{x^2}{a^2}+\frac{A^2{(x-b)}^2}{b^2}=1$ b ²x ²+a ²A ²(x-b) ²-a ²b ²＝0

$x=\frac{\left({2a}^2{A}^{2}b\right)\±\sqrt{{\left({2a}^2{A}^{2}b\right)}^2-4(a^2{A}^2+b^2)a^2{b}^2(A^2-1)}}{2(a^2{A}^2+b^2)}$

M point y coordinate is asked in reasoning: $\begin{array}{ccc}\frac{y}{x-b}=\mathrm{tgk}& \frac{y}{x-b}=\mathrm{tgk}=A& y=A(x-b)\end{array}$

Example of the present invention additionally provides a kind of wind measuring system based on Beidou satellite communication, comprises as follows:

Ultrasound wind system: be made up of multiple survey wind devices, survey the weather information such as wind speed, wind direction of differing heights position respectively, and with the speed of 1MHZ, proportionately the weather information such as wind speed, wind direction is sent to serial server by self-defining form.

Serial server: be the host computer surveying wind devices, the slave computer of big-dipper satellite terminal device.Survey wind devices by RS232/422 self-adapting serial port and each to be connected, be connected by TCP/IP mouth with big-dipper satellite terminal device, the survey wind data of compression is also stored in SD card, surveys wind devices power to each.

Beidou subscriber machine: be made up of parts such as communication, time service and location, mainly completes the reliable real-time transmission surveying wind data, simultaneously, utilizes satellite communication to ensure the safety and reliability of data transmission.

Land control center: comprise computing machine and the ingredient such as hardware affiliated facility, computer software and application software system, database, big-dipper satellite terminal device.To under the mode of operation of a bit, the detection data of multiple anemometer towers that Beidou subscriber machine transmits can be received by multiple spot again.

Client: be made up of Beidou subscriber machine, computing machine, completes the functions such as real-time remote monitoring, inquiry, playback, analysis, shows the weather information such as wind speed, wind direction.

Accompanying drawing explanation

Fig. 1 is a kind of marine wind measuring system Topological Solution composition based on Big Dipper information transmission

Fig. 2 is a kind of marine wind measuring system schematic diagram based on Big Dipper information transmission

Fig. 3 is anemometer tower system construction drawing

Fig. 4 is ultrasound wind devices principle schematic

Fig. 5 is wind direction sectional drawing

Fig. 6 is sectional drawing drawing principle figure

Embodiment

The invention provides a kind of wind detection method based on Big Dipper information transmission and system, anemometer tower unmanned ground can be realized and measure the weather information such as wind direction, wind speed in real time, pass information back control center by Beidou subscriber machine, simultaneously, client can real-time exhibition information.

In the present invention, first logical survey wind devices, obtains the wind speed of its each wind direction of position.

Ultrasound wind devices is arranged on the pylon of the differing heights of anemometer tower, strict Gui Bei, and pedal line is installed.Equipment output end mouth is connected with serial server input port RS 422 mode, and the correctness that checking connects, ultrasound wind devices is a kind of speed resolving to ask for wind utilizing ultrasonic velocity, and there will not be equipment attrition error, during work, continuously the weather informations such as the wind direction perceived, wind speed can be real-time transmitted to serial server.

Serial server, as the host computer surveying wind devices, after receiving the weather information such as wind direction, wind speed, carries out data analysis, process, compression, encryption immediately.Detailed process is: understand the data received, for off-limits data, misdata and survey wind devices malfunction data and carry out rejecting and stored in queue, then give computing unit to calculate: computing unit calculates wind speed mean value avg per minute, variances sigma, wind speed maximal value max and wind speed minimum value min respectively to the data in individual queue, every output data precision requires to reach 2 significant digits; After computing unit calculates, the weather information such as wind direction, wind speed after process to be stored in local SD card and transmission is stored as merit confirmation, to store the weather information such as wind direction, wind speed after successful backward Big Dipper equipment transmission processing.

The embedded house dog software of serial server, guarantees the operation that this equipment is reliable, stable.

Beidou subscriber machine, as the host computer of serial server, receives the weather information such as wind direction, wind speed, by Big Dipper air traffic channel, adopts handshake mechanism, and survey wind breath is beamed back control center.

Control center receives and surveys wind breath, carries out decoding and is programmed into database and carries out system health self monitor.Meanwhile, client synchronously can be monitored in real time, survey wind data displaying etc.

The foregoing is only example of the present invention, be not intended to limit protection scope of the present invention.All any amendments done within the spirit and principles in the present invention, equivalent replacement, improvement etc., be all included within protection scope of the present invention.

Claims (11)

1. survey a valid interface method for wind resource data, comprise the following steps:

Utilize the data-interface surveying wind devices, by Beidou satellite navigation system, time service is carried out to resource measurement, and obtain Big Dipper etalon time resource information in seconds.

2. data processing, compression, a cryptographic algorithm, is characterized in that, comprises the following steps:

By receive p.s. wind resource information by minute in units of be handled as follows.

(1) be averaged the statistical treatments such as number, maximal value, minimum value, variance;

(2) by different classes of data value characteristic of field, " decimal system byte data " is converted to " sexadecimal flow data ", encode by Bit position, thus wind resource information is compressed;

(3) algorithm that the step-by-step such as integrated use radix-minus-one complement, ring shift calculates, re-starts coding to " hexadecimal data stream " by Bit position, is encrypted information source, obtains the wind resource data of land or offshore anemometer tower.

3. a wind resource data Beidou satellite communication transmission method, is characterized in that, comprise the following steps:

Wind resource program data is become Big Dipper short message communication format, adopt transmission mechanism of shaking hands, text is sent to control center's server.

4., by the integrated use of aforesaid right 1, right 2, right 3, by unattended mode, the wind resource data of long-range land or offshore anemometer tower can be obtained in real time.

5. the sectional method for expressing of wind direction 3D, is characterized in that, comprise the following steps:

According to the survey wind devices wind resource data of differing heights distribution on anemometer tower, according to the computing method of solid geometry, adopt the mode of 3 D stereo and animation producing, each height wind direction 3D sectional drawing is shown visually.

6., by the conjunctive use of aforesaid right 4, right 5, wind resource data can be represented in real time in computer client.

7. as right 1 require as described in method, it is characterized in that:

The speed of wind adopts the sound movement velocity in measurement three directions to obtain, namely can from the aerial flight time computing velocity of sound.

(1) definition of northern U, southern V, vertical W tri-axle

+ U is defined as the coordinate north to line.

The definition of+V is counterclockwise 90 ° of directions of right+U.

+ W is defined as at right angle setting axle, and namely U, V form 90 ° of directions of plane.

(2) temperature of sound wave

T _S1＝C ₁ ²/403

Here: T _s1the temperature of=sound wave, C ₁=wind speed, notices that formula does not consider that the impact of humidity is interior.

(3) big-dipper satellite time service provides standard Big Dipper time t

t＝t _sv-Δt _sv

Δt _sv＝a ₀+a ₁(t _sv-t _oc)+a ₂(t _sv-t _oc)+Δt _r

Wherein e be eccentricity of satellite orbit, for evolution, the satellite orbit eccentric anomaly of satellite orbit major semi-axis.F＝-4.442807633×10 ^-10s/m ^1/2

8. as right 2 require as described in method, it is characterized in that:

(1) abnormality value removing

According to minute in the form of expression of abnormal data, abnormal data part abnormal data, all abnormal data, exceptional value does not participate in statistics.

(2) statistics of wind data is surveyed

According to storing minute data in each queue, calculate fol-lowing values respectively:

Wind speed mean value

Variance

Wind speed maximal value max

Wind speed minimum value min.

(3) floating data is converted into fixed-point data, then by decimal fixed-point value according to being converted to sexadecimal fixed-point number.Difference by the fixing sequence of codomain, then is surveyed wind devices data and to be continued sequence by the Various types of data of same survey wind devices, encodes, form data stream by Bit position, thus reaches the object that compression processes.

(4) principle of symmetric cryptography is used, for the data after compression process, adopt the method to step-by-step process such as difference ring shifts about data stream local negate code, all data stream, make data obtain Source Encryption, result adopted Modbus agreement to send to Beidou subscriber machine.

9. as right 3 require as described in method, it is characterized in that:

Big Dipper equipment on all anemometer towers is called transmitting terminal, and the Big Dipper equipment of control center is called receiving end.Then handshake mechanism is as follows:

First time shakes hands: transmitting terminal sends connection request bag to receiving end, containing filename, subpackage number, awaits a response;

Second handshake: after receiving end receives transmitting terminal connection request bag, that request bag is put into oneself does not connect queue, and request bag is sent back to transmitting terminal;

Third time shakes hands: transmitting terminal receives after receiving end returns bag, is aware of receiving end and agrees to connect, and continues to send point Bale No. and packetized data to receiving end;

4-Way Handshake: receiving end continuous reception subpackage, after last subpackage receives, returns point Bale No. of packet loss or receives mark;

Shake hands for 5th time: after transmitting terminal receives and receives mark, terminate to send.Otherwise carry out benefit bag by point Bale No. receiving packet loss to send, continue at most to mend Bao Sanci.

10. as right 5 require as described in method, it is characterized in that:

3D sectional drawing adopts the Elliptic Cylinder that can open up to represent, with one of them value of wind direction value of differing heights for benchmark, wind direction and the benchmark wind direction of each height form deviation angle, and the wind direction straight line connection of each differing heights, formation broken line, broken line and benchmark wind direction axle are formed rolls over shape opening.

11. 1 kinds based on the wind measuring system of Beidou satellite communication, is characterized in that, comprising:

Be made up of the anemometer tower system on the land or sea that are distributed in various places and land control center, each client etc.

(1) the anemometer tower system at land or sea

Be made up of survey wind devices, serial server, big-dipper satellite terminal device, electric power system etc.

1. wind devices is surveyed

Be arranged on the survey wind devices of each height on anemometer tower, namely survey wind devices, adopt the method described in right 1, the weather information such as wind direction, wind-force of perception point.

2. serial server

Gather the weather information such as wind direction, wind-force surveyed wind devices and perceive, adopt the data processing described in right 2, compression, cryptographic algorithm, obtain wind resource data, adopt Modbus agreement to Big Dipper satellite terminal equipment propelling movement wind resource data stored in local SD card data.

Adopt software watchdog, wake serial server up, ensure the continuous working of serial server.

3. big-dipper satellite terminal device

For carrying out with Beidou satellite navigation system the terminal device that communicates, receiving wind resource data by TCP/IP mouth, adopting the wind resource data Beidou satellite communication transmission method described in right 3 and control center to carry out the information interaction of wind resource data.

4. electric power system

The solar electric power supply system of photovoltaic generation pole plate, large-capacity glue accumulator body, controller composition, ensures the electric power supply of the armamentarium on anemometer tower.

(2) land control center, client

Be made up of land control center system, client.

1. land control center system

Basic function:

Receive each land or offshore anemometer tower wind resource data and stored in database;

Real-time remote monitoring;

Data query, playback, analysis;

To client push data;

Data base administration;

2. client

Use computing machine or workstation, the wind resource data of anemometer tower belonging to real-time remote monitoring.