A fire situation playback on-track implementation method

Abstract

The present invention relates to an on-board method for fire situation playback, and belongs to the field of satellite testing technology. The method comprises: designing on-board telemetry for real-time fire point data telemetry and playback of non-real-time fire point data; designing instructions for starting and stopping storage of fire point data, storing the fire point data in the S4 area of ​​the onboard computer when the start instruction is received, and stopping storage when the stop instruction is received; designing two playback modes for the stored fire point data; and automatically stopping all playbacks on the satellite when real-time fire point information is detected. The present invention can playback fire situations in invisible arc segments to on-board telemetry and Beidou short message systems, so that users can monitor fire situations abroad, thereby improving the intelligence and autonomy of satellites.

Description

Technical Field

[0001] The invention relates to an on-orbit fire situation playback implementation method, belonging to the technical field of satellite testing. Background Art

[0002] The main task of the Terrestrial Ecosystem Carbon Monitoring (CM-1) satellite is to complete the three-dimensional measurement of forests, invert biomass, forest stock and forest carbon sink data, etc. The CM-1 satellite is equipped with a fire detection sensor to detect surface fires and crown fires in forest fires, output characteristic information such as fire location and area, and send it to the ground in a timely manner through the Beidou short message system, access the ground emergency information processing system, and guide the ground forest fire and other emergency management departments to deal with it in a timely manner.

[0003] At present, the acquisition of data on invisible arc segments is achieved by unloading from memory or transmitting data stored on the satellite. This method not only has a long cycle, but also requires the data to be decoded on the ground, which is very inconvenient. Summary of the invention

[0004] The technical problem solved by the present invention is: in view of the above technical defects, a method for realizing on-board fire situation playback is proposed, which can realize on-board telemetry playback of satellite overseas fire situation data and RDSS system playback.

[0005] The solution of the present invention is:

[0006] A method for realizing on-orbit fire situation playback, comprising:

[0007] Design fire detection data packets in satellite telemetry for real-time fire point data telemetry and non-real-time fire point data playback;

[0008] A fixed area is divided in the RAM area of ​​the onboard computer, which is recorded as the S4 area. The design injects the instructions "start storing the fire detection sensor data of the S4 area" and "stop storing the fire detection sensor data of the S4 area". The onboard computer determines whether the "start storing the fire detection sensor data of the S4 area" instruction is received. If it is received, the latitude and longitude information of the fire point is stored in the S4 area, otherwise the fire point data is not stored; when the onboard computer receives the "stop storing the fire detection sensor data of the S4 area" instruction, the onboard computer stops storing the fire point data;

[0009] When the sub-satellite point is in a non-Asia-Pacific region, the first playback mode is activated to play back the fire point data stored on the satellite to the on-board telemetry, so that users can observe the fire situation in the invisible arc when passing through;

[0010] When the sub-satellite point is in the Asia-Pacific region, the second playback mode is activated to play back the fire point data stored on the satellite to the fire detection sensor on the satellite, which then sends the data to the RDSS system to facilitate ground emergency management departments to observe fire conditions in invisible arcs during transit.

[0011] Furthermore, the specific implementation method of the first playback mode is:

[0012] The design injects the commands "start playback of S4 area fire detection sensor data" and "stop playback of S4 area fire detection sensor data". The onboard computer determines whether it has received the command "start playback of S4 area fire detection sensor data". If it has received the command to start playback, it will play back the fire point data stored in the specified format to the onboard telemetry, otherwise it will not play back. When the onboard computer receives the command "stop playback of S4 area fire detection sensor data", the onboard computer will stop playing back the fire point data to the telemetry.

[0013] When playing back the fire point data, the onboard computer determines whether the fire detection sensor has found real-time fire information. If there is a real-time fire situation, it will automatically stop playing back the data and switch to real-time telemetry, otherwise it will continue to play back.

[0014] Furthermore, the specific implementation method of the second playback mode is:

[0015] The design injects the commands "enable RDSS to play back fire scene detection sensor data" and "disable RDSS to play back fire scene detection sensor data". The onboard computer determines whether it has received the command "enable RDSS to play back fire scene detection sensor data". If it has received the enable command, it will play back the fire point data stored in the specified format to the RDSS system, otherwise the RDSS will not play back. When the onboard computer receives the command "disable RDSS to play back fire scene detection sensor data", the onboard computer stops playing back the fire point data to the RDSS system.

[0016] When playing back the fire point data, the onboard computer determines whether the fire detection sensor has detected real-time fire information. If there is a real-time fire situation, it will automatically stop playing back the data to the RDSS system, otherwise the RDSS will continue to play back.

[0017] Furthermore, the onboard computer transmits the fire point information to the RDSS system, which then transmits it to the ground terminal via the BeiDou satellite.

[0018] Furthermore, the fire scene detection data packet includes a packet identifier, parameter information and reserved bit information, and the length of the fire scene detection data packet is 62 bytes.

[0019] Furthermore, a 1-byte packet identifier is designed in the fire scene detection data packet to distinguish whether the fire scene detection data packet is real-time fire point data or replayed fire point data.

[0020] Furthermore, a packet identifier of 0x00 represents real-time data, and a packet identifier of 0xFF represents playback data.

[0021] Furthermore, the RDSS system includes a short message processing module and an antenna to complete RD RF signal preprocessing and short message signal processing, and send time and location information to the ground through the short message data sending function.

[0022] Furthermore, the fire scene detection data packet content includes the star time of the fire point sensor and the latitude and longitude information of the fire point.

[0023] Furthermore, when the detector finds a fire point, the fire scene detection data packet stores real-time fire point information, and when the onboard computer starts to play back the fire point data, the fire scene detection data packet can telemeter the stored fire point data.

[0024] The beneficial effects of the present invention compared with the prior art are:

[0025] (1) The present invention does not require the traditional method of obtaining overseas fire data by downloading data from memory or transmitting data stored on the satellite, and then obtaining the fire data by ground decoding, which is convenient and fast;

[0026] (2) The on-board telemetry playback of overseas fire point data and the RDSS system playback method implemented by the present invention greatly improve the intelligence level of the system and enhance the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Implementation flow chart of the present invention;

[0028] Figure 2 This is the information flow diagram for the fire information playback of the present invention. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the embodiments.

[0030] A method for realizing on-track fire situation playback, comprising the following steps:

[0031] 1. Design a "fire detection data packet" in the onboard telemetry for real-time fire point data telemetry and non-real-time fire point data playback. The data packet format is shown in Table 1. When the packet identifier is 0x00, the packet content is real-time fire point data, and when the packet identifier is 0xFF, the packet content is the playback fire point data.

[0032] Table 1 Fire scene detection data packet content

[0033]

[0034]

[0035] 2. The onboard computer's injection instructions include the instructions "start storing the fire scene detection sensor data in area S4" and "stop storing the fire scene detection sensor data in area S4". Upon receiving the instruction "start storing the fire scene detection sensor data in area S4", the onboard computer's fire scene information processing module packages the fire scene information and stores it according to Table 2.

[0036] Table 2S4 area storage fire detection sensor data format

[0037]

[0038]

[0039] 3. In order to replay the fire point data stored on the satellite to the on-board telemetry, the instructions "start replaying the S4 area fire detection sensor data" and "stop replaying the S4 area fire detection sensor data" are designed in the on-board computer injection instructions;

[0040] like Figure 1 As shown, the onboard computer fire scene information processing module determines whether the "start playback of S4 area fire scene detection sensor data" command is received. If the start playback command is received, the stored fire point data is played back to the onboard telemetry (Table 1);

[0041] When the onboard computer fire scene information processing module receives the "stop playback of S4 area fire scene detection sensor data" command, it stops playing back the fire point data to telemetry;

[0042] During the data playback process, when the detector finds real-time fire scene information, the fire scene information processing module automatically stops playing back the data and packages the real-time fire point information into Table 1.

[0043] 4. In order to replay the fire point data stored on the satellite to the RDSS system, the instructions "enable RDSS to replay fire scene detection sensor data" and "disable RDSS to replay fire scene detection sensor data" are designed in the onboard computer injection instructions;

[0044] The fire scene information processing module of the onboard computer determines whether the "enable RDSS to play back fire scene detection sensor data" command is received. If the command is received, the stored fire point data is played back to the RDSS system and then transmitted to the ground terminal via the Beidou satellite. Figure 2 As shown;

[0045] When the fire scene information processing module of the onboard computer receives the command "prohibit RDSS from playing back fire scene detection sensor data", it stops sending data to the RDSS system;

[0046] During the data playback process, when the detector detects real-time fire scene information, the fire scene information processing module automatically stops sending it to the RDSS system.

[0047] The present invention does not require the traditional method of obtaining overseas fire data by downloading from memory or transmitting the satellite-stored data, and then obtaining the fire data by ground decoding, which is convenient and fast.

[0048] The on-board telemetry playback of overseas fire point data and the RDSS system playback method implemented by the present invention greatly improve the intelligence level of the system and enhance the user experience.

[0049] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A method for realizing on-track fire situation playback, characterized in that: include: Design fire detection data packets in satellite telemetry for real-time fire point data telemetry and non-real-time fire point data playback; A fixed area is divided in the RAM area of ​​the onboard computer, which is recorded as the S4 area. The design injects the instructions "start storing the fire detection sensor data of the S4 area" and "stop storing the fire detection sensor data of the S4 area". The onboard computer determines whether the "start storing the fire detection sensor data of the S4 area" instruction is received. If it is received, the latitude and longitude information of the fire point is stored in the S4 area, otherwise the fire point data is not stored; when the onboard computer receives the "stop storing the fire detection sensor data of the S4 area" instruction, the onboard computer stops storing the fire point data; When the sub-satellite point is in a non-Asia-Pacific region, the first playback mode is activated to play back the fire point data stored on the satellite to the on-board telemetry, so that users can observe the fire situation in the invisible arc when passing through; When the sub-satellite point is in the Asia-Pacific region, the second playback mode is activated to play back the fire point data stored on the satellite to the fire detection sensor on the satellite, and then the fire detection sensor sends the data to the RDSS system to facilitate the ground emergency management department to observe the fire situation in the invisible arc during the transit; The specific implementation method of the first playback mode is: The design injects the commands "start playback of S4 area fire scene detection sensor data" and "stop playback of S4 area fire scene detection sensor data". The onboard computer determines whether it has received the command "start playback of S4 area fire scene detection sensor data". If it has received the command to start playback, it will playback the fire point data stored in the specified format to the onboard telemetry. Otherwise, it will not playback. When the onboard computer receives the command "stop playback of S4 area fire scene detection sensor data", the onboard computer will stop playback of the fire point data to the telemetry. When playing back the fire point data, the onboard computer determines whether the fire detection sensor has found real-time fire information. If there is a real-time fire situation, it will automatically stop playing back the data and switch to real-time telemetry, otherwise it will continue playing back; The specific implementation method of the second playback mode is: The design injects the commands "enable RDSS to play back fire scene detection sensor data" and "disable RDSS to play back fire scene detection sensor data". The onboard computer determines whether it has received the command "enable RDSS to play back fire scene detection sensor data". If it has received the enable command, it will play back the fire point data stored in the specified format to the RDSS system, otherwise the RDSS will not play back. When the onboard computer receives the command "disable RDSS to play back fire scene detection sensor data", the onboard computer stops playing back the fire point data to the RDSS system. When playing back the fire point data, the onboard computer determines whether the fire detection sensor has detected real-time fire information. If there is a real-time fire situation, it will automatically stop playing back the data to the RDSS system, otherwise the RDSS will continue to play back.

2. The method for realizing on-track fire situation playback according to claim 1, characterized in that: The onboard computer transmits the fire point information to the RDSS system, which then transmits it to the ground terminal via the Beidou satellite.

3. The on-track method for fire situation playback according to claim 1, characterized in that: The fire scene detection data packet includes a packet identifier, parameter information and reserved bit information. The length of the fire scene detection data packet is 62 bytes.

4. The on-track method for fire situation playback according to claim 1, characterized in that: A 1-byte packet identifier is designed in the fire scene detection data packet to distinguish whether the fire scene detection data packet is real-time fire point data or replayed fire point data.

5. The on-track method for fire situation playback according to claim 4, characterized in that: The packet identifier 0x00 represents real-time data, and the packet identifier 0xFF represents playback data.

6. The on-track method for fire situation playback according to claim 1, characterized in that: The RDSS system includes a short message processing module and an antenna to complete RD radio frequency signal preprocessing and short message signal processing, and send time and location information to the ground through the short message data sending function.

7. The on-track method for fire situation playback according to claim 1, characterized in that: The fire scene detection data packet includes the star time of the fire point sensor and the latitude and longitude information of the fire point.

8. The on-track method for fire situation playback according to claim 7, characterized in that: When the detector finds a fire point, the fire scene detection data packet stores the real-time fire point information. When the onboard computer starts to play back the fire point data, the fire scene detection data packet can telemeter the stored fire point data.

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