CN101304462B - Telescope remote control method based on iridium star point-to-point communication mode - Google Patents
Telescope remote control method based on iridium star point-to-point communication mode Download PDFInfo
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- CN101304462B CN101304462B CN2008101238702A CN200810123870A CN101304462B CN 101304462 B CN101304462 B CN 101304462B CN 2008101238702 A CN2008101238702 A CN 2008101238702A CN 200810123870 A CN200810123870 A CN 200810123870A CN 101304462 B CN101304462 B CN 101304462B
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Abstract
The invention relates to a telescope remote control method based on an iridium satellite point-to-point communication mode, which is characterized in that the method comprises the following steps: an iridium MODEM is connected with a local control host of the telescope by a standard RS232 interface; a remote control host can be provided with a common MODEM or the iridium MODEM; the remote control host can establish a communication link with the local control host by the way of dialing a special number of the iridium MODEM at the local control host; after the communication link is established, the two parties mutually send control orders and state information to carry out the telescope remote control. The telescope remote control method overcomes the control difficulties of control systems of unattended astronomical telescopes in sparse and remote areas, and solves the following technical problems: the local control host carries out the remote awakening, over-weak and signal discontinuity of the iridium satellite signal, reliability of observation pictures and low cost return. The control system can form a technical proposal with practical useful values by using the iridium communication system.
Description
Technical field
The present invention relates to a kind of control method, be specifically related to a kind of telescope remote control method based on iridium satellite point-to-point communication mode.
Background technology
Along with the influence of the mankind to physical environment, increasing telescopical addressing now trends towards meagrely-populated backcountry.These regional atmospheric environments are good, pollute and lack, and no light pollution is had inconvenient traffic problems such as communication difficulties but also exist.For example, on January 12nd, 2008 by the South Pole telescope CSTAR of Chinese Academy of Sciences Nanjing astronomical optics technical institute development with the 24th scientific investigation in the Antarctic shipping of China toward the South Pole, arrive at the South Pole landlocked peak ice dome A smoothly, now finish installation smoothly.Such kind of area, the similar South Pole is not suitable for human living, must adopt the Long-distance Control means to telescope, but adopts for example short wave communication of general telecommunication means in the Antarctic region, and means such as CDMA/GPRS all are inappropriate.The short wave communication poor anti jamming capability, bit error rate height, the Data Receiving rate is low.CDMA/GPRS and needs are built the corresponding mobile base station.Unique feasible mode is to adopt IRIDIUM to carry out communication at present.
IRIDIUM is introduced: IRIDIUM is based on satellite network, so that the global personal communication system of speech, data to be provided.Mainly form: satellite network, ground network, mobile subscriber by 3 parts.Voice, data communication are carried out in the system business permission Anywhere in the whole world.The characteristics of communication are to exchange between star, the satellite up to the sky, dialing user location.The business of IRIDIUM comprises: two way voice communication, note, data function.System provides two kinds of data service: 2.4kbps and 9.6kbps.2.4kbps business is used for Point-to-Point Data Transmission, can with another iridium satellite terminal or land pstn telephone network-in-dialing, with the 2.4kbps bandwidth for transmission.Data; 9.6kbps business is used to login Internet, browses Internet with the 9.6kbps bandwidth, receiving and dispatching mail, or login a certain given server.The iridium satellite data communication adopts 66 low orbit satellites, is unique in the world real voice-and-data communication system of realizing that the whole world covers.IRIDIUM was once stopped using early, but these several years have recently restarted to enable.The company of the Australia and the U.S. can both provide this service.
But above-mentioned iridium satellite communication system can't simply directly be applied to the control of astronomical telescope, because wherein have the problem of some technology:
1, because at Antarctic region weather and abominable, and half a year be that be daytime half a year at night.So had no talent night half a year in research station, the South Pole.Cost in South Pole generating is very high, and telescope to observe must be at night.Therefore need carry out Remote Wake Up to local main control system.This also needs some other technological means except needs utilize the communication function of iridium satellite communication system.
2, because telescope is located in the South Pole, even iridium satellite satellite the signal here also is very weak, signal easily off and on.If adopt common point-to-point communication mode can not satisfy the communication need of astronomical telescope control in this case.
3, because the communication bandwidth constraints, signal interrupts easily, and the communication fee of iridium satellite is very high, if it is may cost very high and efficient is not high to adopt common mode to pass back to passing back of observation pictures.
Utilize the iridium satellite communication system to solve unmanned astronomical telescope control problem and need solve above-mentioned technical difficulty, and solution still not yet in effect in the prior art.
Summary of the invention
At the problems referred to above, the purpose of this invention is to provide a kind of telescope remote control method based on iridium satellite point-to-point communication mode, this method can utilize the iridium satellite communication system to be formed in the control system of meagrely-populated backwoodsman unmanned astronomical telescope, and solves following technical matters: local main control system carries out Remote Wake Up, iridium satellite satellite-signal and crosses weak and signal is interrupted, reliability of observation pictures and low cost are passed back.Make this control system can become a technical scheme that actual use value is arranged.
The scheme of finishing the foregoing invention task is: a kind of telescope remote control method based on iridium satellite point-to-point communication mode is characterized in that step is as follows:
RS232 interface by standard is connected iridium satellite MODEM on the telescopical local main control system; Common MODEM can be installed on the long-range control host machine also iridium satellite MODEM can be installed.
Long-range control host machine is set up communication link by mode and the local main control system of dialling iridium satellite MODEM special number on the local main control system;
After communication link was set up, both sides sent out control command and status information mutually, carried out the telescope Long-distance Control.
In the above scheme, the workflow of setting up the iridium satellite point-to-point communication is:
(iridium satellite MODEM supports the AT order, uses identically with plain old telephone MODEM, and having high bit rate is the standard RS232 interface of 19200bps).When utilizing iridium satellite MODEM to set up point-to-point communication, local main control system must connect iridium satellite MODEM, and long-range control host machine can connect iridium satellite MODEM also can connect common MODEM (generally adopting common MODEM).
When the MODEM of long-range control host machine connects the iridium satellite MODEM of local main control system, its data transmission flow process is as follows: the data that long-range control host machine sends are sent to the iridium satellite gateway through public telephone network and are sent to the iridium satellite communication system again and send to iridium satellite MODEM, set up communication link;
Communication link establishment stage (baud rate 2400bps, take over party's number xxx); Data receiver is set to listening state with iridium satellite MODEM by AT order " ATS0=1 ", and the serial communication baud rate is 2400bps;
Data receiver sends order " ATDT xxx " to iridium satellite MODEM, returns ascii string " CONNECT 2400 " during success, then returns " NO CARRIER " during failure, expression " link stops "; " BUSY " expression " line be busy ", " NO ANSWER " expression " is not replied ".
Data side's receiving end at first receives " RING ", after delay a period of time, if " CONNECT 2400 " are then received in the link establishment success, if " NO CARRIER " then received in the link establishment failure.
Data send the reception stage: after communication link is set up successfully, can carry out two-way any data transmission.Communication link discharges: data receiver sends " +++" to iridium satellite MODEM, withdraws from data transmission; Send " ATH ", then on-hook.
Say that more specifically and more optimally in each step, the concrete job step of local main control system and long-range control host machine is as follows in the above scheme of the present invention,
The job step of local main control system:
After local main control system is waken up by long-range control host machine, open communication program automatically
Communication program is to the serial ports initialization
It is 2400 that the serial ports baud rate is set, and no parity, position of rest are 1, and data bit is 8
Open serial ports
It is listening state that transmission ATSO=1 is provided with MODEM
Wait for and receive data
Read the data in the buffer zone
If message is not equal to " ATH ", continue to wait for the reception data
The cleaning serial ports;
The job step of long-range control host machine:
Long-range control host machine is opened communication program
Communication program is to the serial ports initialization
It is 2400 that the serial ports baud rate is set, and no parity, position of rest are 1, and data bit is 8
Open serial ports
Put through local main control system iridium satellite MODEM, wake local main control system up
Disconnect connection, wait for that local main control system starts
Send " ATDT+ iridium satellite MODEM number " and connect local main control system
As " returning CONNECT 2004 " expression successful connection
Send command messages to local main control system
" " to local main control system, the expression order sends and finishes ATH in transmission
Close serial ports.
Because the Antarctic region is located in the polar region, though iridium satellite can cover here, a little less than the signal, bandwidth is little, so is utilizing iridium satellite also to need in to the process of telescope Long-distance Control to take some other technological means (constituting prioritization scheme of the present invention).Described " other technological means " step is as follows:
1, because at Antarctic region weather and abominable, and half a year be that be daytime half a year at night.So had no talent night half a year in research station, the South Pole.Cost in South Pole generating is very high, and telescope to observe must be at night.Therefore need carry out Remote Wake Up to local main control system.
Solution: at first will satisfy two condition precedents:
Local main control system must be connected on the power supply;
The mainboard of local main control system must be supported the Remote Wake Up function
Implementation method: be provided with at the CMOS of local main control system and look for modem ring resume or POWER ON BY RING item in the option POWER MANAGEMENT SETUP, be set and be ON or ENABLED.As long as iridium satellite Modem is in opening, takes the Modem of long-range control host machine to dial the telephone number that iridium satellite Modem connected and just can realize the Remote Wake Up of local main control system.
2, since telescope be located in the South Pole, even iridium satellite satellite the signal here also is very weak, signal easily off and on, the easy packet loss of the message of transmission is if adopt common point-to-point communication mode can not satisfy communication need in this case.
Solution is to adopt following 2 steps simultaneously:
In the 1st step, the command file that transmits is compressed transmission;
In the 2nd step, the data that long-range control host machine sends are carried out the frame packing, per 32 bytes are a frame, and add CRC16 (cyclic redundancy check (CRC)) verification.In the data transmit-receive process, local main control system is with after long-range control host machine is connected, and local main control system carries out verification to each frame data that receives, and according to check results long-range control host machine is replied.
3, because the communication bandwidth constraints, signal interrupts easily, and the communication fee of iridium satellite is very high, if it is may cost very high and efficient is not high to adopt common mode to pass back to passing back of observation pictures.
Solution: adopt following two steps simultaneously
In the 1st step, at first the picture of passing back is carried out necessary compression.
Iridium satellite MODEM by local main control system initiatively initiates to be connected with the MODEM of long-range control host machine.
The ftp server that can support breakpoint transmission is installed in long-range control host machine, is utilized the function of FTP that picture is sent to long-range control host machine.
The present invention has overcome the control difficulty in the control system of meagrely-populated backwoodsman unmanned astronomical telescope, and has solved following technical matters: local main control system carries out Remote Wake Up, iridium satellite satellite-signal and crosses weak and signal is interrupted, reliability of observation pictures and low cost are passed back.Make this control system utilize the iridium satellite communication system to constitute the technical scheme that actual use value is arranged.
Description of drawings
Fig. 1 is local main control system snoop procedure process flow diagram;
Fig. 2 sets up the communication link process flow diagram flow chart for long-range control host machine;
Fig. 3 is the point-to-point order communication flow of iridium satellite figure.
Embodiment
RS232 interface by standard is connected iridium satellite MODEM on the telescopical local main control system; Common MODEM can be installed on the long-range control host machine also iridium satellite MODEM can be installed.
Long-range control host machine is set up communication link by mode and the local main control system of dialling iridium satellite MODEM special number on the local main control system;
After communication link was set up, both sides sent out control command and status information mutually, carried out the telescope Long-distance Control.
In the above scheme, the workflow of setting up the iridium satellite point-to-point communication is:
(iridium satellite MODEM supports the AT order, uses identically with plain old telephone MODEM, and having high bit rate is the standard RS232 interface of 19200bps).When utilizing iridium satellite MODEM to set up point-to-point communication, local main control system must connect iridium satellite MODEM, and long-range control host machine can connect iridium satellite MODEM also can connect common MODEM (generally adopting common MODEM).
When the MODEM of long-range control host machine connects the iridium satellite MODEM of local main control system, its data transmission flow process is as follows: the data that long-range control host machine sends are sent to the iridium satellite gateway through public telephone network and are sent to the iridium satellite communication system again and send to iridium satellite MODEM, set up communication link;
Communication link establishment stage (baud rate 2400bps, take over party's number xxx); Data receiver is set to listening state with iridium satellite MODEM by AT order " ATSO=1 ", and the serial communication baud rate is 2400bps;
Data receiver sends order " ATDT xxx " to iridium satellite MODEM, returns ascii string " CONNECT 2400 " during success, then returns " NO CARRIER " during failure, expression " link stops "; " BUSY " expression " line be busy ", " NO ANSWER " expression " is not replied ".
Data side's receiving end at first receives " RING ", after delay a period of time, if " CONNECT 2400 " are then received in the link establishment success, if " NO CARRIER " then received in the link establishment failure.
Data send the reception stage: after communication link is set up successfully, can carry out two-way any data transmission.Communication link discharges: data receiver sends " +++" to iridium satellite MODEM, withdraws from data transmission; Send " ATH ", then on-hook.
More than in each step, the concrete job step of local main control system and long-range control host machine is as follows,
The job step of local main control system:
After local main control system is waken up by long-range control host machine, open communication program automatically
Communication program is to the serial ports initialization
It is 2400 that the serial ports baud rate is set, and no parity, position of rest are 1, and data bit is 8
Open serial ports
It is listening state that transmission ATSO=1 is provided with MODEM
Wait for and receive data
Read the data in the buffer zone
If message is not equal to " ATH ", continue to wait for the reception data
The cleaning serial ports;
The job step of long-range control host machine:
Long-range control host machine is opened communication program
Communication program is to the serial ports initialization
It is 2400 that the serial ports baud rate is set, and no parity, position of rest are 1, and data bit is 8
Open serial ports
Put through local main control system iridium satellite MODEM, wake local main control system up
Disconnect connection, wait for that local main control system starts
Send " ATDT+ iridium satellite MODEM number " and connect local main control system
As " returning CONNECT 2004 " expression successful connection
Send command messages to local main control system
" " to local main control system, the expression order sends and finishes ATH in transmission
Close serial ports.
In the above step, local main control system must be connected on the power supply; Simultaneously, in the 1st step, the mainboard of local main control system must be supported the Remote Wake Up function.Be provided with at the CMOS of local main control system and look for modem ring resume or POWER ON BY RING item in the option POWER MANAGEMENT SETUP, be set and be ON or ENABLED.As long as iridium satellite Modem is in opening, takes the Modem of long-range control host machine to dial the telephone number that iridium satellite Modem connected and just can realize the Remote Wake Up of local main control system.
In the 1st step, the command file that transmits is compressed transmission;
In the 2nd step, the data that long-range control host machine sends are carried out the frame packing, per 32 bytes are a frame, and add CRC16 (cyclic redundancy check (CRC)) verification.In the data transmit-receive process, local main control system is with after long-range control host machine is connected, and local main control system carries out verification to each frame data that receives, and according to check results long-range control host machine is replied.
In the 1st step, at first the picture of passing back is carried out necessary compression.
In the 2nd step, initiate to be connected by the iridium satellite MODEM active of local main control system and the MODEM of long-range control host machine.
In the 3rd step, the ftp server that can support breakpoint transmission is installed in long-range control host machine, utilize the function of FTP that picture is sent to long-range control host machine.
Claims (4)
1. telescope remote control method based on iridium satellite point-to-point communication mode is characterized in that step is as follows:
RS232 interface by standard is connected iridium satellite MODEM on the telescopical local main control system; Common MODEM is installed on the long-range control host machine or iridium satellite MODEM is installed;
Long-range control host machine is set up communication link by group mode and the local main control system of the iridium satellite MODEM special number that local main control system connects;
After communication link was set up, both sides sent out control command and status information mutually, carried out the telescope Long-distance Control;
The workflow of setting up the iridium satellite point-to-point communication is:
When utilizing iridium satellite MODEM to set up point-to-point communication, local main control system must connect iridium satellite MODEM;
When the MODEM of long-range control host machine connects the iridium satellite MODEM of local main control system, its data transmission flow process is as follows: the data that long-range control host machine sends are sent to the iridium satellite gateway through public telephone network, send to the iridium satellite MODEM of local main control system again by the iridium satellite communication system, set up communication link;
Communication link establishment stage: baud rate 2400bps, take over party's number xxx; Data receiver is set to listening state with iridium satellite MODEM by AT order " ATS0=1 ", and the serial communication baud rate is 2400bps;
Data receiver sends order " ATDT xxx " to iridium satellite MODEM, returns ascii string " CONNECT 2400 " during success, then returns " NO CARRIER " during failure, expression " link stops "; " BUSY " expression " line be busy ", " NO ANSWER " expression " is not replied ";
Data side's receiving end at first receives " RING ", after delay a period of time, if " CONNECT 2400 " are then received in the link establishment success, if " NO CARRIER " then received in the link establishment failure;
Data send the reception stage: after communication link is set up successfully, can carry out two-way any data transmission; Communication link discharges: data receiver sends " +++" to iridium satellite MODEM, withdraws from data transmission; Send " ATH ", then on-hook;
In each step, the concrete job step of local main control system and long-range control host machine is as follows,
The job step of local main control system:
After local main control system is waken up by long-range control host machine, open communication program automatically;
Communication program is to the serial ports initialization;
It is 2400 that the serial ports baud rate is set, and no parity, position of rest are 1, and data bit is 8;
Open serial ports;
It is listening state that transmission ATSO=1 is provided with MODEM;
Wait for and receive data;
Read the data in the buffer zone;
If message is not equal to " ATH ", continue to wait for the reception data;
The cleaning serial ports;
The job step of long-range control host machine:
Long-range control host machine is opened communication program;
Communication program is to the serial ports initialization;
It is 2400 that the serial ports baud rate is set, and no parity, position of rest are 1, and data bit is 8;
Open serial ports;
Put through local main control system iridium satellite MODEM, wake local main control system up;
Disconnect connection, wait for that local main control system starts;
Send " ATDT+ iridium satellite MODEM number " and connect local main control system;
As " returning CONNECT 2004 " expression successful connection;
Send command messages to local main control system;
Send " ATH " to local main control system, the expression order sends and finishes;
Close serial ports.
2. the telescope remote control method based on iridium satellite point-to-point communication mode according to claim 1 is characterized in that,
Local main control system must be connected on the power supply;
In the job step of local main control system, the mainboard of local main control system must be supported the Remote Wake Up function; Be provided with at the CMOS of local main control system and look for modem ring resume or POWER ON BY RING item in the option POWER MANAGEMENT SETUP, be set and be ON or ENABLED.
3. the telescope remote control method based on iridium satellite point-to-point communication mode according to claim 1 is characterized in that, in the job step of local main control system, the command file that transmits is compressed transmission;
In the job step of long-range control host machine, the data that long-range control host machine sends are carried out the frame packing, per 32 bytes are a frame, and add CRC16;
In the data transmit-receive process, local main control system is with after long-range control host machine is connected, and local main control system carries out verification to each frame data that receives, and according to check results long-range control host machine is replied.
4. according to claim 1 or 2 or 3 described telescope remote control methods, it is characterized in that, in the job step of local main control system, at first the picture of passing back is carried out necessary compression based on iridium satellite point-to-point communication mode;
The ftp server that can support breakpoint transmission is installed in long-range control host machine, is utilized the function of FTP that picture is sent to long-range control host machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101238702A CN101304462B (en) | 2008-05-27 | 2008-05-27 | Telescope remote control method based on iridium star point-to-point communication mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2008101238702A CN101304462B (en) | 2008-05-27 | 2008-05-27 | Telescope remote control method based on iridium star point-to-point communication mode |
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| CN101304462A CN101304462A (en) | 2008-11-12 |
| CN101304462B true CN101304462B (en) | 2010-12-15 |
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Families Citing this family (3)
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| CN102571824A (en) * | 2012-03-08 | 2012-07-11 | 中国科学院计算机网络信息中心 | Astronomical telescope network collaborative observation method based on four-layer structure |
| CN102880131B (en) * | 2012-09-14 | 2015-01-14 | 中国科学院国家天文台南京天文光学技术研究所 | Software control method applied to Antarctic astronomical telescope |
| CN112558988A (en) * | 2020-11-16 | 2021-03-26 | 中国航发西安动力控制科技有限公司 | Remote filling method and filling equipment for engine control software |
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