CN111373882B - Long-range sonde based on beidou navigation system - Google Patents
Long-range sonde based on beidou navigation system Download PDFInfo
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- CN111373882B CN111373882B CN201218003682.3A CN201218003682A CN111373882B CN 111373882 B CN111373882 B CN 111373882B CN 201218003682 A CN201218003682 A CN 201218003682A CN 111373882 B CN111373882 B CN 111373882B
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Abstract
The utility model provides a long-range sonde based on beidou navigation system, includes: the sensor module is used for sensing the change of the atmospheric parameter; the data acquisition module is used for acquiring the electric signals output by the sensor module; the satellite receiving module is used for receiving the position information and the time information of the sonde positioned by the satellite through an antenna; the main control module is used for receiving the data output by the data acquisition module, carrying out A/D sampling control on the data, acquiring the position information and the time information output by the satellite receiving module, carrying out digital coding and outputting the position information and the time information; and the Beidou satellite communication module receives the data output by the main control module, transmits the data to the Beidou navigation satellite in a short message communication mode, and forwards the data packet to the ground station in a short message communication mode to obtain meteorological data. The novel satellite navigation frequency band is adopted, the system is suitable for long-distance data transmission, the short message communication can transmit 120 Chinese character information once, and the data measured by the sonde for many times can be combined into one frame for transmission, so that the communication efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of meteorological sondes, and particularly relates to a sonde based on a Beidou navigation system, which is used for acquiring typhoon meteorological data such as atmospheric temperature, humidity, pressure, wind speed and the like.
Background
The radio sounding system is still the most basic and most common means in the field of high-altitude weather detection so far, and provides basic atmospheric state information for weather forecast, weather analysis, weather research and business services. The wind measurement precision based on the navigation satellite system is high, the ground system is simple, and the operation is simple and convenient, so that the system becomes the mainstream of the radio high-altitude meteorological detection in the world nowadays.
A multichannel meteorological sounding system in the prior art comprises a sonde, a receiving antenna, a multichannel receiver and a data acquisition processing microcomputer, wherein the sonde is a multi-frequency point radiosonde, the multi-frequency point radiosonde comprises an air temperature sensor, an air humidity sensor, a GPS receiving module, a modulation module and a radio transmitter, and each sonde with different frequency points transmits a group of original data of temperature, humidity, GPS longitude, GPS latitude and altitude every second. The multi-channel receiver is a multi-frequency point combined receiver, and the receiving antenna transmits the received radio sounding signals of a plurality of frequency points to the channels of the corresponding frequency points of the multi-channel receiver respectively, and the radio sounding signals are transmitted to a data acquisition processing microcomputer after being demodulated. The multi-frequency-point radiosonde utilizes a GPS receiving module to provide longitude, latitude and altitude original data information of the radiosonde, and adopts a receiving antenna to respectively transmit received radio sounding signals of a plurality of frequency points to channels of corresponding frequency points of a multi-channel receiver. The emission frequency point of the multi-frequency point sonde is 400.15-406 MHz, the bandwidth occupied by each sonde in the special frequency band 400.15-406 MHz for meteorological sounding is 20kHz, and radio frequency bands are adopted for data transmission and are only suitable for near-distance transmission, so that remote data transmission cannot be realized.
Meanwhile, the development of the Beidou navigation satellite in China brings vitality to the application of the Beidou navigation satellite in the field of high-altitude meteorological sounding in China. Not only can our country get rid of the situation that the GPS high-altitude sonde is restricted by people and is difficult to develop fully, but also lays a solid foundation for further improving the high-altitude weather detection technology and the automation level of our country.
Disclosure of Invention
The invention aims to provide a remote sonde based on a Beidou navigation system, which utilizes a Beidou navigation satellite to transmit measured data back to a ground station in a short message mode, so that the remote data transmission of the sonde is realized.
The sonde used for realizing the invention comprises a sensor module, a data acquisition module, a satellite receiving module, a main control module, a Beidou satellite communication module and a power supply module.
A satellite receiving module: the satellite receiver is used for providing position information (longitude, latitude and altitude) and time information of the sonde, and the ground station calculates corresponding wind direction and wind speed according to the position information provided by the satellite;
a sensor module: the device is used for sensing the change of the atmospheric parameters and converting the change of the atmospheric parameters into electric signals and comprises a temperature sensor, a humidity sensor and a pressure sensor;
a data acquisition module: the device is used for acquiring the electric signal output by the sensor module, and sending the electric signal to the main control module after the electric signal is amplified by the operational amplifier and A/D sampled;
the main control module: the system is used for controlling A/D sampling, collecting sampling data and collecting sonde position time data output by a satellite receiving module, and sending the data to a Beidou satellite communication module after digital coding;
big dipper satellite communication module: the Beidou satellite communication module receives the data packet sent by the main control module and sends the data packet to the Beidou navigation satellite in a short message mode, and the Beidou navigation satellite forwards the data packet to the ground station.
According to the invention, the main control module of the sonde packages the measurement data and then sends the data to the Beidou satellite communication module through the RS232 interface, the Beidou satellite communication module sends the data packet to the Beidou navigation satellite by utilizing the special short message communication function of the Beidou system, and the Beidou navigation satellite forwards the data packet to the ground station. The invention has the following outstanding advantages:
1. the Beidou navigation satellite system adopts a new satellite navigation frequency band, and is suitable for long-distance data transmission;
2. according to the invention, a data packet is sent to the Beidou navigation satellite by utilizing a special short message communication function provided by the Beidou navigation system, and the Beidou navigation satellite forwards the data packet to the ground station. The short message communication can transmit 120 Chinese character information (240 bytes) once, and data measured by the sonde for many times can be formed into a frame for transmission, so that the communication efficiency is improved.
Drawings
FIG. 1 is a structural block diagram of a sonde based on a Beidou navigation satellite;
FIG. 2 is a schematic block diagram of the present invention for measuring atmospheric temperature, humidity and pressure;
FIG. 3 is a flow chart of the meteorological sounding system based on the Beidou navigation satellite.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific examples.
As shown in fig. 1, the sonde of this embodiment includes a sensor module, a data acquisition module, a satellite receiving module, a main control module, and a beidou satellite communication module.
The sensor module is used for sensing the change of the atmospheric parameters and converting the change of the atmospheric parameters into electric signals. Which includes a temperature sensor, a humidity sensor, and a pressure sensor.
The principle of sensor measurement is shown in fig. 2, and the resistance and capacitance variation measured by the temperature and humidity and air pressure sensor probe is converted into voltage or frequency variation. The variable quantities are analog quantities, are converted into digital quantities after small signal amplification and A/D conversion by an operational amplifier, and are sent to a main control module after being corrected.
In the embodiment, the temperature measuring sensor preferably adopts, but is not limited to, a GPW2 type cylindrical thermistor, the temperature measuring range is-90 to +55 degrees, and the resistance value range is 9 to 700K omega. The resistor body is 10mm long and 1mm in diameter, and the surface of the resistor body is coated with a high-reaction-rate coating. In order to improve the reliability of the system, two GPW2 paths can be adopted for temperature measurement, and the measurement result is interpreted and filtered by the main controller.
The humidity measuring sensor in the embodiment preferably adopts XGH-02 type high polymer elastic material and a moisture absorption material mixed according to a certain proportion for measurement, and consists of an organic glass substrate containing TX-100, sorbitol, carbon black and other components. In order to improve the reliability of the system, two XGH-02 channels are adopted for humidity measurement, and the measurement result is interpreted and filtered by the main controller.
In this embodiment, the air pressure measurement sensor is preferably a PC24 type silicon pressure-resistant pressure sensor, and the air pressure value is obtained by a humidity ratio method, and the pressure measurement data is compensated by a software and hardware temperature compensation method. The method has the advantages of large dynamic compensation range, high precision and capability of effectively improving the linearity. In order to improve the reliability of the system, two paths of PCs 24 can be used for air pressure measurement, and the measurement result is interpreted and filtered by a main controller.
The data acquisition module is used for acquiring the electric signals output by the sensor module, amplifying the electric signals by an operational amplifier of the data acquisition module and then sending the amplified electric signals to the main control module.
And the satellite receiving module is used for receiving the position information and the time information of the sonde positioned by the satellite through the antenna. The position information comprises longitude, latitude and height, and the ground station can calculate the wind direction and the wind speed corresponding to the sonde according to the position information and the time information. The satellite used for positioning can be a GPS or a beidou satellite, and the GPS is preferably adopted in the embodiment.
The wind direction and the wind speed are calculated by utilizing the position change of the sonde measured by the navigation satellite in the sounding system, and the method has the advantages of high measurement precision, simple structure of a ground system and the like. The coordinates of two adjacent points relative to the ground station during the descent process of the sonde are (x1, y1, z1), (x2, y2, z2), respectively, and the actual wind direction and wind speed are as follows:
θ＝arctg((y2-y1)/(x2-x1))
V＝sqrt((x2-x1)^2+(y2-y1)^2)/t
where t is the time for the sonde to move from this point to the adjacent point.
The main control module is used for controlling A/D sampling of the data amplified by the data acquisition module and acquiring position information and time information output by the satellite receiving module, and sending the data to the Beidou satellite communication module after digital coding.
The TMS320F2812 is preferably adopted by the processor of the main control module, the 14-bit AD conversion chip AD7656 is preferably adopted by the A/D sampling chip, and sampling and conversion of 6-path measurement signals can be completed by one AD 7656. And the 1-path asynchronous serial port is used for communicating with the Beidou satellite communication module.
The Beidou satellite communication module transmits the coded data to a Beidou navigation satellite in a short message communication mode, and the Beidou navigation satellite forwards the data packet to a ground station in a short message communication mode.
The Beidou satellite communication module is preferably based on a BDI-SC01 type Beidou data transmission terminal, and the module has the following main technical indexes: 1) reception sensitivity: less than or equal to-160 dBW; 2) peak power of transmitter: less than or equal to 10W; 3) communication interface: RS 232; 4) working temperature: -40 to 70.
The Beidou satellite navigation system mainly has three functions: the method has the advantages that the positioning is fast, and all-weather and real-time positioning service is provided for users in a service area; precise time service is carried out, and the precision reaches 20 ns; short message communication can convey 120 Chinese character information (240 bytes) at one time. The short message communication function is a special communication service function of the Beidou satellite navigation system, the function is only open to authorized users, and the short message communication rate of a Q channel is 500 bps.
The data refreshing frequency of the sonde is 1Hz, each frame of data comprises 22 bytes (176Bit) including time (4Byte), temperature (2Byte), humidity (2Byte), pressure (2Byte), longitude (4Byte), latitude (4Byte) and height (2Byte), and the data frame header, frame tail and data check code are added to obtain about 250Bit, so that the communication rate required by the sonde and a satellite is 250bps, and the communication rate of a Q channel is 500bps and meets the data transmission requirement.
In order to improve the communication efficiency, the data measured by the sonde for multiple times can be combined into one frame for transmission. Since each short message contains 240 bytes, and the updated set of measurement data per second is 18 bytes (excluding time 4 bytes), 12 sets of measurement data can be sent after being packed into one data packet (220 bytes in total).
And the ground station receives the sonde data transmitted by the Beidou navigation satellite and processes the data, so that the user can obtain meteorological data.
The remote sonde further comprises a power supply module for supplying power to other modules.
Claims (5)
1. The utility model provides a long-range sonde based on beidou navigation system, includes:
the sensor module is used for sensing the change of the atmospheric parameters and converting the change of the atmospheric parameters into electric signals;
the data acquisition module is used for acquiring the electric signals output by the sensor module and outputting the electric signals after amplification processing;
the satellite receiving module is used for receiving the position information and the time information of the sonde positioned by the satellite through an antenna and calculating the wind direction and the wind speed corresponding to the sonde according to the position information and the time information;
the main control module receives the data output by the data acquisition module, performs A/D sampling control on the data, simultaneously acquires the position information and the time information output by the satellite receiving module, and digitally encodes the sampled data and the received position information and time information and outputs the encoded data; and
the Beidou satellite communication module receives the data output by the main control module and transmits the data to a Beidou navigation satellite in a short message communication mode, and the Beidou navigation satellite forwards the data to a ground station in a short message communication mode so as to obtain meteorological data;
the main control module comprises a processor, an A/D sampling chip and an asynchronous serial port, wherein the processor is used for digitally encoding position information and time information, outputting the position information and the time information to the Beidou satellite communication module through the asynchronous serial port, and simultaneously controlling the A/D sampling chip to perform A/D sampling control on data output by the data acquisition module;
the short message communication mode carries out short message communication through a Q channel on the Beidou navigation satellite, and the communication speed of the Q channel is 500 bps.
2. The Beidou navigation system based remote sonde of claim 1, wherein the sensor module comprises a temperature sensor, a humidity sensor and a pressure sensor.
3. The Beidou navigation system based remote sonde of claim 1 or 2, wherein the position information comprises longitude information, latitude information and altitude information.
4. The Beidou navigation system based remote sonde of claim 1 or 2, wherein the positioning satellites are GPS or BD satellites.
5. The Beidou navigation system based remote sonde of claim 1 or 2, wherein the encoded data frame size is 250 bits, the encoded data frame size comprises a time of 32 bits, meteorological parameters of 48 bits, and position information of 80 bits, and the sonde data refresh frequency is 1 Hz.
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| CN201218003682.3A CN111373882B (en) | 2012-08-31 | 2012-08-31 | Long-range sonde based on beidou navigation system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188565A (en) * | 2018-10-15 | 2019-01-11 | 南京信息工程大学 | A kind of the digital meteorological sounding meter and its sounding system with camera |
| CN109870746A (en) * | 2019-03-19 | 2019-06-11 | 南京信息工程大学 | A kind of Design of meteorological data collection based on Beidou technology |
| CN116010750A (en) * | 2022-12-26 | 2023-04-25 | 中国人民解放军32021部队 | Sounding method, device and equipment based on precise single-point positioning technology |
-
2012
- 2012-08-31 CN CN201218003682.3A patent/CN111373882B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188565A (en) * | 2018-10-15 | 2019-01-11 | 南京信息工程大学 | A kind of the digital meteorological sounding meter and its sounding system with camera |
| CN109870746A (en) * | 2019-03-19 | 2019-06-11 | 南京信息工程大学 | A kind of Design of meteorological data collection based on Beidou technology |
| CN116010750A (en) * | 2022-12-26 | 2023-04-25 | 中国人民解放军32021部队 | Sounding method, device and equipment based on precise single-point positioning technology |
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