Search and rescue system based on ad hoc network technology

Abstract

The invention discloses a search and rescue system based on an ad hoc network technology. The search and rescue system comprises an ad hoc network module, a WIFI module and a satellite communication module. Program setting is carried out on the WIFI module through the microcontroller, different working modes are set, and one of the working modes is used as a wireless access point mode; the WIFI chip can carry software application, all WiFi network functions are unloaded through the other processor, and the WIFI chip supports three working modes of STA / AP / STA + AP; the key node comprises satellite terminal equipment, a ground station and a control center; the ground station is responsible for processing signal transmission and forwarding tasks; the control center coordinates all node operations; compared with the prior art, the system has the advantages that the efficiency and accuracy of rescue command are effectively improved, the maneuverability of rescue teams and the capability of dealing with emergencies are enhanced, rescue resources are quickly allocated, and the system is suitable for occasions where simultaneous measurement and control of multiple points are needed and wiring is inconvenient through establishment and interconnection of the WiFi network.

Description

Technical Field

[0001] The present invention relates to the technical field of self-organizing network search and rescue positioning, in particular to a search and rescue system based on self-organizing network technology. Background Art

[0002] A wireless ad hoc network is a multi-hop, mobile, peer-to-peer network consisting of several to dozens of nodes, using wireless communication and dynamic networking. Nodes typically have a continuous energy supply and do not require fixed equipment support, allowing each node to form its own network. During communication, data is forwarded by other user nodes. This network format overcomes the geographical limitations of traditional wireless networks and can be deployed more quickly, conveniently, and efficiently. It is suitable for scenarios where there is no network on site and rapid network construction and convenient installation are required.

[0003] In existing search and rescue work, the search and rescue method for trapped persons is often to conduct large-scale manpower search and rescue at the place where the trapped person last disappeared. This method has poor search and rescue effect and can easily lead to missing the golden search and rescue time, resulting in a reduced chance of survival for the trapped person; or through medium-orbit satellite positioning, but when calling satellite positioning, due to the high requirements for the use of satellite positioning and the limitations of the signal distance emitted by the trapped person's terminal, when calling satellite positioning, only a large-scale positioning of the trapped person's position can be performed, and it is difficult to accurately locate the position.

[0004] The information disclosed in this background technology section is only intended to enhance understanding of the overall background of the invention and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the above technical defects and provide a search and rescue system based on ad hoc network technology, which combines satellite communication with wireless ad hoc network technology and applies it to emergency rescue. It can not only effectively improve the efficiency and accuracy of rescue command, but also enhance the mobility of the rescue team and its ability to respond to emergencies. By real-time monitoring of the disaster area, rapid deployment of rescue resources, and establishment of an effective command and coordination mechanism, the success rate of rescue work can be greatly improved, and casualties and property losses can be reduced. Through the construction and interconnection of WiFi networks, the mobile phone host computer can monitor and wirelessly measure and control the data of each site, which is suitable for occasions where multi-point simultaneous measurement and control is required and wiring is inconvenient.

[0006] In order to solve the above problems, the technical solution of the present invention is a search and rescue system based on ad hoc network technology: comprising: an ad hoc network module, a WIFI module, a satellite communication module and a data reception, data transmission and data processing module, wherein the data reception, data transmission and data processing module serve as auxiliary function modules;

[0007] The WIFI module is programmed through the microcontroller to set different working modes. One of the working modes is used as a wireless access point mode and serves as the central node of the entire wireless network. Other modules are configured as station modes as terminal nodes of the system.

[0008] The WIFI chip can carry software applications and offload all WiFi network functions through another processor. The WIFI chip supports three working modes: STA / AP / STA+AP.

[0009] The WIFI chip is selected as AP mode. The AP module serves as the central node of the entire system, providing WiFi signals for the entire system. Each node connects to the WiFi signal in STA mode. The AP module establishes a hotspot with a fixed address and port number.

[0010] Satellite communication module, key nodes include satellite terminal equipment, ground stations and control centers. The satellite terminal equipment is used to receive and send data; the ground station is responsible for processing signal transmission and forwarding tasks; the control center coordinates all node operations;

[0011] Wireless ad hoc network module, key nodes include node devices, routing protocols and network management software.

[0012] Furthermore, the WiFi module in STA mode and other devices such as mobile phones and PCs are connected to the nodes in AP mode at the same time to form a wireless local area network, and the mobile phone is set as a server.

[0013] Furthermore, the microcontroller includes power management, 8MHz clock crystal oscillator, reset circuit, debug download JTAG interface, I / O port pin circuit, and is a 32-bit ARM core-based microcontroller with 512K bytes of flash memory, an operating frequency of 72MHz, and a built-in high-speed memory.

[0014] Furthermore, the STA mode is that the WIFI chip connects to the Internet through a router, and the mobile phone or computer realizes remote control of the device through the Internet; the AP mode is the default mode ATK_WIFI chip as a hotspot, which enables the mobile phone or computer to communicate directly with the module and realize wireless control of the LAN; the STA+AP mode is a coexistence mode of the two modes. In the STA mode, you can connect to the Internet through a router and control the device through the Internet; the AP mode can also be used as a WiFi hotspot, and other WiFi devices can be connected to the module.

[0015] Furthermore, in the STA mode programming, the ESP8266 on other nodes is used as STA mode, joining the WiFi signal with a fixed IP address, providing a feasible basis for subsequent communication between local area networks; data transmission and control programming: the numbers between the second and third points in the fixed address of the STA module must correspond to the address assigned by the server (mobile phone or PC) after connecting to the AP signal, and after the server is turned on, the STA module will automatically connect to the server.

[0016] Furthermore, the node device is the basic unit for realizing information transmission, which is responsible for collecting and sending data; the routing protocol optimizes the data path selection to ensure that the information can reach the destination quickly and accurately; the network management software is responsible for maintaining the network status and troubleshooting.

[0017] The advantages of the present invention compared with the existing technology are:

[0018] The present invention combines satellite communication with wireless ad hoc network technology for emergency rescue, which can not only effectively improve the efficiency and accuracy of rescue command, but also enhance the mobility of the rescue team and its ability to respond to emergencies. By real-time monitoring of the disaster area, rapid deployment of rescue resources, and the establishment of an effective command and coordination mechanism, the success rate of rescue work can be greatly improved, and casualties and property losses can be reduced. Through the establishment and interconnection of WiFi networks, the mobile phone host computer can monitor and wirelessly measure and control the data of each site, which is suitable for situations where multi-point simultaneous measurement and control is required and wiring is inconvenient. DETAILED DESCRIPTION

[0019] In order to make the contents of the present invention more clearly understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention.

[0020] A search and rescue system based on ad hoc network technology, comprising: an ad hoc network module, a WIFI module, a satellite communication module and a data receiving, data transmission and data processing module, wherein the data receiving, data transmission and data processing module serve as auxiliary function modules;

[0021] The WIFI module is programmed through a microcontroller to set different working modes. One of the working modes is set as a wireless access point mode, which can transform the device into a wireless access point, allowing wireless devices to connect and access the network. In AP mode, the device will no longer simply receive wireless signals and forward them to the wired network, but will open an independent wireless network and also grant other wireless devices access to this network. After other devices connect to this network wirelessly, they can communicate on the network and access resources on the Internet. It also serves as the central node of the entire wireless network, and other modules are configured in station mode as terminal nodes of the system.

[0022] The microcontroller includes power management, 8MHz clock crystal oscillator, reset circuit, debugging and downloading JTAG interface, I / O port pin circuit. The microcontroller is a 32-bit ARM core-based microcontroller with 512K bytes of flash memory, an operating frequency of 72MHz, and a built-in high-speed memory.

[0023] The WiFi module in STA mode connects to other devices such as mobile phones and PCs at the same time as nodes in AP mode to form a wireless local area network. The mobile phone is set as a server (tcpserver). After the server is turned on, no matter whether the ESP8266 is in STA mode or AP mode, as long as they share the same network, they can connect to the server and transmit and communicate data with each other. At the same time, it controls the client to implement different functions, such as temperature and humidity collection, lighting control, pressure flow, liquid level and other industrial process control parameters detection and unlimited adjustment, thereby realizing the design of multi-node device wireless Internet of Things self-organizing network.

[0024] The WIFI chip can carry software applications and offload all WiFi network functions through another processor. The WIFI chip supports three working modes: STA / AP / STA+AP.

[0025] In STA mode, the Wi-Fi chip connects to the internet via a router, allowing remote control of the device from a mobile phone or computer. AP mode, the default mode, uses the ATK_WIFI chip as a hotspot, allowing a mobile phone or computer to communicate directly with the module, enabling wireless control over the LAN. STA+AP mode is a coexistence of the two modes. In STA mode, you can connect to the internet via a router and control the device over the internet; in AP mode, you can also use it as a Wi-Fi hotspot, allowing other Wi-Fi devices to connect to the module. This allows seamless switching between the LAN and the Guangcheng network, making operation more convenient.

[0026] The module working in STA mode joins the network as an independent individual. At this time, the WiFi module acts as a client and is also set as a server. After all the parameters of all WiFi chips are set, the LAN can be established. Through the access point information of the already set AP mode, the module in STA working mode is connected to the access point. The module can be set to single connection and multiple connections. It should be noted that when set to single connection, it is necessary to connect to the server in advance before the connection can be made, otherwise the connection will fail. The module set to multiple connections will continue to send signals to connect until the connection is successful and then stop the action;

[0027] The WIFI chip is selected as AP mode. The AP module serves as the central node of the entire system, providing WiFi signals for the entire system. Each node connects to the WiFi signal in STA mode. The AP module establishes a hotspot with a fixed address and port number.

[0028] In the STA mode programming, the ESP8266 on other nodes is used as STA mode, joining the WiFi signal with a fixed IP address, providing a feasible basis for subsequent communication between local area networks; data transmission and control programming: the numbers between the second and third points in the fixed address of the STA module must correspond to the address assigned by the server (mobile phone or PC) after connecting to the AP signal, and after the server is turned on, the STA module will automatically connect to the server.

[0029] Satellite communication module, key nodes include satellite terminal equipment, ground stations and control centers. The satellite terminal equipment is used to receive and send data; the ground station is responsible for processing signal transmission and forwarding tasks; the control center coordinates all node operations;

[0030] Wireless ad hoc network module, key nodes include node devices, routing protocols and network management software.

[0031] The node device is the basic unit for realizing information transmission, responsible for collecting and sending data. The routing protocol optimizes the data path selection to ensure that the information can reach the destination quickly and accurately; the network management software is responsible for maintaining the network status and troubleshooting.

[0032] The present invention and its embodiments are described above. In short, if a person skilled in the art is inspired by the above, and does not deviate from the purpose of the present invention, he or she may design a similar structure and embodiment to the technical solution without creativeness, and all of them shall fall within the scope of protection of the present invention.

Claims

1. A search and rescue system based on ad hoc network technology, characterized in that: include: Ad hoc network module, WIFI module, satellite communication module and data reception, data transmission and data processing module, wherein the data reception, data transmission and data processing module serve as auxiliary function modules; The WIFI module is programmed through the microcontroller to set different working modes. One of the working modes is used as a wireless access point mode and serves as the central node of the entire wireless network. Other modules are configured as station modes as terminal nodes of the system. The WIFI chip can carry software applications and offload all WiFi network functions through another processor. The WIFI chip supports three working modes: STA / AP / STA+AP. The WIFI chip is selected as AP mode. The AP module serves as the central node of the entire system, providing WiFi signals for the entire system. Each node connects to the WiFi signal in STA mode. The AP module establishes a hotspot with a fixed address and port number. Satellite communication module, key nodes include satellite terminal equipment, ground stations and control centers. The satellite terminal equipment is used to receive and send data; the ground station is responsible for processing signal transmission and forwarding tasks; the control center coordinates all node operations; Wireless ad hoc network module, key nodes include node devices, routing protocols and network management software.

2. The search and rescue system based on ad hoc network technology according to claim 1, characterized in that: The WiFi module in STA mode and other devices such as mobile phones and PCs are connected to nodes in AP mode at the same time to form a wireless local area network, and the mobile phone is set as a server.

3. The search and rescue system based on ad hoc network technology according to claim 1, characterized in that: The microcontroller includes power management, 8MHz clock crystal oscillator, reset circuit, debugging and downloading JTAG interface, I / O port pin circuit. The microcontroller is a 32-bit ARM core-based microcontroller with 512K bytes of flash memory, an operating frequency of 72MHz, and a built-in high-speed memory.

4. The search and rescue system based on ad hoc network technology according to claim 1, characterized in that: The STA mode is when the WIFI chip connects to the Internet through a router, and a mobile phone or computer can remotely control the device through the Internet; the AP mode is the default mode, and the ATK_WIFI chip acts as a hotspot, enabling a mobile phone or computer to communicate directly with the module and realize wireless control of the LAN; the STA+AP mode is a coexistence mode of the two modes. In the STA mode, you can connect to the Internet through a router and control the device through the Internet; the AP mode can also be used as a WiFi hotspot, and other WiFi devices can be connected to the module.

5. The search and rescue system based on ad hoc network technology according to claim 1, characterized in that: In the STA mode programming, the ESP8266 on other nodes is used as STA mode, joining the WiFi signal with a fixed IP address, providing a feasible basis for subsequent communication between local area networks; data transmission and control programming: the numbers between the second and third points in the fixed address of the STA module must correspond to the address assigned by the server (mobile phone or PC) after connecting to the AP signal, and after the server is turned on, the STA module will automatically connect to the server.

6. The search and rescue system based on ad hoc network technology according to claim 1, characterized in that: The node device is the basic unit for realizing information transmission, responsible for collecting and sending data. The routing protocol optimizes the data path selection to ensure that the information can reach the destination quickly and accurately; the network management software is responsible for maintaining the network status and troubleshooting.