CN107360539A - A kind of low-power consumption emergency communication network hardware system based on LoRa technologies - Google Patents

Abstract

The present invention relates to a low-power emergency communication network hardware system based on LoRa technology, comprising several mobile terminals, several LoRa terminal components and at least one LoRa concentrator component; each mobile terminal is connected with a LoRa terminal component Bluetooth, and the one The LoRa terminal component sends the data received from a mobile terminal to the LoRa concentrator component, and the LoRa concentrator component forwards the data to another LoRa terminal component according to the object requested by the LoRa terminal component, and the other LoRa concentrator component The terminal component transmits data to another mobile terminal, and the system also includes several LoRa relay components for extending the transmission distance between the LoRa terminal component and the LoRa concentrator component. The present invention independently forms a network through the lora remote communication technology, builds an instant communication network, and can perform long-distance low-power consumption communication without resorting to a cellular network base station in an emergency situation.

Description

A low-power emergency communication network hardware system based on LoRa technology

technical field

The invention relates to the field of the Internet of Things, in particular to a low-power emergency communication network hardware system based on LoRa technology.

Background technique

Lora is a long-distance and low-power wireless communication technology, and it is one of the LPWAN communication technologies. Compared with other communication methods, its modulation method greatly increases the communication distance, and can be widely used in the field of long-distance low-speed Internet of Things wireless communication in various occasions. Lora technology is a communication technology that uses unlicensed frequency bands, that is, it is not applicable to the operator's cellular network and is used for independent network construction. Higher, strong network reliability, extremely low power consumption, one AA lithium battery can power a lora terminal device for more than 5 years. The Lora network architecture is a star topology network, that is, each terminal node and gateway can directly communicate with each other, which not only reduces the complexity of network operation, but also effectively reduces power consumption. The Lora network architecture consists of terminals, repeaters, concentrators and other servers.

At present, the commonly used communication technologies need to rely on existing communication base stations for communication, while the coverage of cellular network communication base stations is limited, and the construction cost of communication base stations is relatively high, requiring stable power supply and a large amount of investment for operation. In some emergency situations, the power supply is cut off and the base station cannot work normally, which will cause communication to be blocked and information cannot be transmitted in time. The low-power long-distance transmission characteristics of Lora technology provide a better solution for emergency communication in emergency situations.

After searching the existing literature, it is found that the Chinese patent authorization announcement number CN206237396U "Smart Bracelet Based on Lora Short-distance Wireless Communication" describes the application of lora technology in communication, and has achieved certain results in the field of lora communication, but There are still some deficiencies: the use of lora technology solves the problem of short-distance communication, but does not provide a longer-distance communication solution, and lacks the use of repeater spread spectrum systems, which will be limited in longer-distance communication ; In the case of limited power supply conditions, its high power consumption will cause the device to fail to work continuously for a long time, lacking a good solution to the power consumption problem.

Contents of the invention

The purpose of the present invention is to solve the problem of emergency communication in the state of no power supply. The present invention expands the transmission distance between the LoRa terminal component and the LoRa concentrator component through the LoRa relay component, and realizes long-distance low Power Consumption Communications.

To achieve the above object, the technical solution of the present invention is: a low-power emergency communication network hardware system based on LoRa technology, comprising: some mobile terminals, some LoRa terminal components and at least one LoRa concentrator component; each mobile terminal and A LoRa terminal assembly Bluetooth connection, the LoRa terminal assembly sends data received from a mobile terminal to the LoRa concentrator assembly, and the LoRa concentrator assembly forwards data to another object according to the object requested by the LoRa terminal assembly A LoRa terminal component, the other LoRa terminal component transmits data to another mobile terminal.

Further, the LoRa terminal assembly includes a Bluetooth module, a first single-chip microcomputer module, a LoRa terminal module, a first power supply module, and a first power detection module; the Bluetooth module is used to transmit data with the mobile terminal, and the Bluetooth module is connected to the second The data transmission interface of a single-chip microcomputer module is connected; The LoRa terminal module is connected with the soft serial port of the first single-chip microcomputer module, and is used to send the data converted by the first single-chip microcomputer to the LoRa concentrator assembly; The first power supply module is connected to the first The power interface of the single-chip microcomputer module is connected; the first power detection module is connected with the soft serial port of the first single-chip microcomputer module.

Further, the LoRa concentrator assembly includes a LoRa concentrator module, a second single-chip microcomputer module and a second power supply module, and the second power supply module is connected to the power interface of the second single-chip microcomputer module; the LoRa concentrator module is connected to the The data transmission interface of the second single-chip microcomputer module is connected; the LoRa concentrator module receives the data sent by a LoRa terminal assembly, and forwards data to another LoRa terminal assembly according to the object requested by the LoRa terminal assembly.

Further, the system also includes several LoRa relay components, and the LoRa relay components are respectively connected with the LoRa terminal component and the LoRa concentrator component.

Further, the LoRa relay component includes a LoRa repeater module, a third single-chip microcomputer module, a third power supply module and a second power detection module, and the third power supply module is connected to the power interface of the third single-chip microcomputer module, The second power detection module is connected to the soft serial port of the third single-chip microcomputer module; the LoRa repeater module is used to receive the data transmitted by the LoRa terminal assembly and send the data to the LoRa concentrator assembly, and is also used to receive The data transmitted by the LoRa concentrator component and send the data to another LoRa terminal component; the LoRa relay component is used to extend the transmission distance between the LoRa terminal component and the LoRa concentrator component.

Further, the model of the Bluetooth module is HC-05.

Compared with the prior art, the present invention has the following beneficial effects: In emergency situations, long-distance low-power communication can be carried out without the help of a base station, multi-hop cascading can be carried out through LoRa relay components, and the original communication range can be expanded to realize Long-distance communication; organize the feedback information of the mobile terminal through the LoRa concentrator component to ensure that one mobile terminal can communicate with multiple mobile terminals at the same time; build an instant communication network through lora remote communication technology in the state of no power supply to solve the problem of no Emergency communication problems in the state of power supply.

Description of drawings

Fig. 1 is a schematic diagram of the system composition and structure of an embodiment of the present invention;

Fig. 2 is the internal connection circuit diagram of the LoRa terminal assembly;

Fig. 3 is the internal connection circuit diagram of the LoRa relay component;

Fig. 4 is the internal connection circuit diagram of the LoRa concentrator component;

Fig. 5 is a flow chart of data transmission in the present invention.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1, a kind of low power consumption emergency communication network hardware system based on LoRa technology of the present invention comprises some mobile terminals, some LoRa terminal assemblies and at least one LoRa concentrator assembly; Each mobile terminal and a LoRa terminal assembly Bluetooth connection, the LoRa terminal component sends the data received from a mobile terminal to the LoRa concentrator component, and the LoRa concentrator component forwards the data to another or more according to the object requested by the LoRa terminal component. The LoRa terminal component, the other or more LoRa terminal components transmit data to the corresponding mobile terminal.

In this embodiment, mobile phone 1, mobile phone 2 and mobile phone 3 are respectively connected to LoRa terminal assembly 1, LoRa terminal assembly 2 and LoRa terminal assembly 3 through bluetooth; Communication can be divided into two kinds: A. Transmission; B. Directly connected by the terminal and the concentrator. The communication between the mobile phone 1 and the mobile phone 2 is realized through data transmission through the repeater, and the communication between the mobile phone 1 and the mobile phone 3 is realized directly through the terminal component and the concentrator component for data transmission.

A: The mobile phone 1 transmits the data to be transmitted to the LoRa terminal component 1 through the programmed mobile app. The ArduinoUNO MCU in the LoRa terminal component 1 converts the information received from the mobile phone into hexadecimal, and passes through the terminal in the terminal component 1. The module transmits the information to the repeater module in the LoRa relay component 1, and the repeater module transmits the received data to the concentrator module in the lora concentrator component, and the concentrator module sends the data according to the source and request The received object sends the received data to the lora relay component 2, and the relay component 2 sends the data to the terminal module in the lora terminal component 2 through the repeater module according to the data source and the object received by the request, and the lora terminal component 2 The ArduinoUNO MCU converts the received data from hexadecimal to string, and sends the data to the mobile phone 2 through the Bluetooth module, and the mobile phone 2 receives the data, and realizes the data visualization through the app on the mobile phone. The communication process between the mobile phone 1 and the mobile phone 2 is reversible, so the two-way communication between the mobile phone 1 and the mobile phone 2 can be realized.

B: The mobile phone 1 transmits the data to be transmitted to the lora terminal component 1 through the programmed mobile app. The ArduinoUNO microcontroller in the lora terminal component 1 converts the information received from the mobile phone into hexadecimal. The terminal in the lora terminal component 1 The module directly transmits the data to the concentrator module in the lora concentrator component, and the concentrator module directly transmits the received data to the lora terminal component 3 according to the source of the data transmission and the object to be received; the ArduinoUNO MCU in the lora terminal component 3 will The received data is converted from hexadecimal to string, and the data is sent to the mobile phone 3 through the Bluetooth module, and the mobile phone 3 receives the data, and realizes data visualization through the app on the mobile phone. The communication process between the mobile phone 1 and the mobile phone 3 is reversible, so the two-way communication between the mobile phone 1 and the mobile phone 3 can be realized.

In this way, a low-power emergency communication network hardware system based on LoRa technology can be composed of more than one terminal component, more than one repeater component and a concentrator component.

As shown in Figure 2, in this embodiment, the LoRa terminal assembly includes an HC-05 Bluetooth module for transmitting data with the mobile phone, a LoRa terminal module for receiving and transmitting data, and a LoRa terminal module for A power supply module for power supply, an Arduino UNO MCU for hard serial port and soft serial port data conversion, and a power detection module for detecting power.

The Bluetooth module is connected to the data transmission interface of the Arduino UNO single-chip microcomputer, that is, the TXD and RXD interfaces, the power module is connected to the power interface of the single-chip microcomputer, the terminal module and the power detection module are respectively connected to the soft serial port of the single-chip microcomputer, and the soft serial port is the data port on the single-chip microcomputer , can be set by programming the microcontroller.

As shown in Figure 3, in this embodiment, the LoRa relay component includes a LoRa repeater module for data transfer, a power supply module for supplying power to the repeater module, and a block for hard serial port and software An Arduino UNO microcontroller for serial port data conversion and a power detection module for detecting power.

The LoRa repeater module is connected to the data transmission interface of the Arduino UNO microcontroller, that is, the TXD and RXD interfaces, and the power module is connected to the power interface of the microcontroller.

As shown in Figure 4, in this embodiment, the LoRa concentrator component includes a LoRa concentrator module for data collection, an Arduino UNO microcontroller for hard serial port and soft serial port data conversion, and an Arduino UNO microcontroller for sending data to the concentrator. Power module for powering the module.

As shown in Figure 5, a low-power emergency communication network hardware system based on LoRa technology of the present invention, the data transmission mode is divided into two types according to the distance: more than 20km and less than 20km. When the transmission distance is less than 20km, the LoRa terminal component and the LoRa Data transmission can be performed directly between concentrator components, and LoRa relay components need to be used as data transfer stations for data transmission if the distance is higher than 20km.

The above-listed preferred embodiments have further described the purpose, technical solutions and advantages of the present invention in detail. It should be understood that the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Within the spirit and principles of the present invention, any modifications, equivalent replacements, improvements, etc., shall be included within the protection scope of the present invention.

Claims (7)

1. A kind of 1. low-power consumption emergency communication network hardware system based on LoRa technologies, it is characterised in that including：Some movements End, some LoRa terminal assemblies and an at least LoRa concentrate device assembly；Each mobile terminal and a LoRa terminal assembly bluetooth connections, The data received from a mobile terminal are sent to LoRa and concentrate device assembly, the LoRa concentrators group by the one LoRa terminal assemblies The object that part is asked according to the LoRa terminal assemblies, another or multiple LoRa terminal assemblies are forwarded the data to, it is described Another or multiple LoRa terminal assemblies transfer data to corresponding mobile terminal.
2. 2. a kind of low-power consumption emergency communication network hardware system based on LoRa technologies according to claim 1, its feature Be, the LoRa terminal assemblies include bluetooth module, the first one-chip computer module, LoRa terminal modules, the first power module and First electric power detection module；The bluetooth module is used to transmit data, the bluetooth module and the first single-chip microcomputer mould with mobile terminal The data transmission interface connection of block；The LoRa terminal modules are connected with the soft serial ports of the first one-chip computer module, for that will pass through The data of first single-chip microcomputer conversion are sent to LoRa and concentrate device assembly；The electricity of first power module and the first one-chip computer module Source interface connects；First electric power detection module is connected with the soft serial ports of the first one-chip computer module.
3. 3. a kind of low-power consumption emergency communication network hardware system based on LoRa technologies according to claim 1, its feature It is, the LoRa concentrates device assembly to include LoRa concentrator modules, second singlechip module and second source module, and described the Two power modules are connected with the power interface of the second singlechip module；The LoRa concentrator modules and second singlechip mould The data transmission interface connection of block；The LoRa concentrator modules receive the data that a LoRa terminal assemblies are sent, according to described The object of one LoRa terminal assemblies request, forwards the data to other LoRa terminal assemblies.
4. 4. a kind of low-power consumption emergency communication network hardware system based on LoRa technologies according to claim 1, its feature Be, the system also includes some LoRa relay components, the LoRa relay components respectively with the LoRa terminal assemblies, LoRa concentrates device assembly connection.
5. 5. a kind of low-power consumption emergency communication network hardware system based on LoRa technologies according to claim 4, its feature It is, the LoRa relay components include LoRa repeater modules, the 3rd one-chip computer module, the 3rd power module and the second electricity Detection module, the 3rd power module are connected with the power interface of the 3rd one-chip computer module, second electric power detection Module is connected with the soft serial ports of the 3rd one-chip computer module；The LoRa repeater modules are used to receive the LoRa terminal assemblies The data of transmission simultaneously send the data to LoRa concentration device assemblies, are also used for receiving the data that the LoRa concentrates device assembly transmission And send the data to other LoRa terminal assemblies；The LoRa relay components be used for extend the LoRa terminal assemblies with it is described LoRa concentrates the transmission range between device assembly.
6. 6. a kind of low-power consumption emergency communication network hardware system based on LoRa technologies according to claim 2, its feature It is, the model HC-05 of the bluetooth module.
7. 7. a kind of low-power consumption emergency communication network hardware system based on LoRa technologies according to claim 1, its feature It is, the mobile terminal is mobile phone.