CN215300667U - Two-way communication system of loRa ad hoc network - Google Patents

Abstract

The utility model discloses a double-circuit communication system of loRa ad hoc network, including consecutive acquisition terminal, communication module, MCU, control management cloud platform and access terminal, acquisition terminal links to each other with GPS orientation module. According to the technical scheme, the LoRa communication and carrier communication dual-communication mode is adopted, the completeness of data acquisition of the Internet of things information is ensured, an additional line does not need to be added, and the completeness of data information collection and transmission is improved on the premise of avoiding the increase of cost and line complexity.

Description

Two-way communication system of loRa ad hoc network

Technical Field

The utility model relates to the field of communication technology, especially, relate to a dual-path communication system of loRa ad hoc network.

Background

The current social internet of things industry develops rapidly, and the internet of things technology is widely applied to various industries. The currently common communication technology of the internet of things mainly comprises LoRa, NB-IOT, Zigbee, Bluetooth, WIFI and the like, wherein the LoRa has the characteristics of low power consumption, long distance and low speed. Therefore, the LoRa is commonly used in small-scale ad hoc networks with the characteristics of flexible deployment, low operation cost and the like. And the method is widely applied to scenes such as wireless meter reading, wireless sensor networks and the like.

The data shows that when the existing LoRa ad hoc network copies the non-direct-connected node group, a large amount of node data is mainly uplinked by adopting a direct competition reporting mode, namely, the relay does not cache any node data. Each time the relay receives a packet of data, the relay immediately passes the data to the previous relay. There are the following disadvantages:

1. the channel occupancy rate is high. Most of the LoRa ad hoc networks are low-power networks, and when data communication is performed, a long-lead-code awakening device needs to be used for communication. When a plurality of devices communicate in the network, the channel occupancy rate is high, and the device interference is serious.

2. High energy consumption and low transmission efficiency. Each time a packet of data is transmitted, a long preamble wakeup is required, resulting in a large amount of power consumption for waking up other devices. The transmission energy consumption is high, and the efficiency is low.

3. Single channel communication, the inter-device interference is severe. Under a single channel, collision can be reduced only by means of random time delay in a competitive reporting mode among devices, and when the communication duty ratio is large, packet loss rate is high due to collision of data packets. The resulting data retransmission may result in an increased communication power consumption overhead.

Chinese patent document CN109067892A discloses a "big data transmission method, terminal and server in Lora communication system". In the uplink direction, the Lora terminal divides the big data into short messages with fixed length, which can be transmitted by the Lora communication system, and continuously transmits the short messages to the server, and the server reassembles the messages after the fragments are completely received. In the downlink direction, the server side fragments the big data into short messages with fixed length which can be transmitted by the Lora communication system, the short messages are transmitted to the Lora terminal through the SX1301 in a continuous mode, and the terminals completely receive the sub-packets from the server side and then reassemble the messages. According to the technical scheme, under a single channel, collision can be reduced only by means of contention reporting among devices through random time delay, and when the communication duty ratio is large, packet loss rate is high due to collision of data packets.

Disclosure of Invention

The utility model discloses mainly solve original technical scheme and only have single loRa data collection mode, easily receive the technical problem that the environmental impact leads to the data to be lacked, provide a loRa from the double-circuit communication system of network deployment, adopt loRa communication and carrier communication dual communication mode, ensure thing allies oneself with information data acquisition's completeness, need not to increase extra circuit, improve the completeness of data information collection and transmission under the prerequisite of avoiding cost and circuit complexity to increase.

The above technical problem of the present invention can be solved by the following technical solutions: the utility model discloses a consecutive collection terminal, communication module, MCU, control management cloud platform and access terminal, collection terminal links to each other with GPS orientation module. The acquisition terminal is installed and is used for realizing data acquisition on treating the acquisition equipment, and communication module carries out data transmission through radio communication and wired communication two kinds of modes and ensures the integrality of transmission information, and MCU carries out data summary sum and handles, and control management cloud platform is used for having remote access and the optimization of gathering with transmission information storage to the high in the clouds, and access terminal is used for the staff to realize looking over the long-range of data of gathering.

Preferably, the communication module comprises a wireless communication module and a wired communication module, the wireless communication module is wirelessly connected with the acquisition terminal, and the wired communication module is connected with the acquisition terminal through a power line.

Preferably, the wireless communication module comprises an loRa acquisition module and an loRa antenna, the loRa antenna is wirelessly connected with the acquisition terminal, and the loRa acquisition module is connected with the MCU.

Preferably, the wired communication module comprises a zero-crossing detection circuit, a signal sending circuit, a signal coupling circuit, a signal receiving and filtering circuit and a zero-crossing synchronization circuit which are connected in sequence, wherein an input control end of the signal coupling circuit is connected with an electric wire, and an input end of the zero-crossing detection circuit and an output end of the zero-crossing synchronization circuit are connected with the carrier signal. The carrier wave judges sampling time through a zero-crossing detection circuit, and signals to be transmitted are sent through a signal sending circuit and are coupled to an electric wire through a signal coupling circuit for transmission; the information transmitted on the wire is also transmitted to the signal receiving filter circuit and the zero-crossing synchronization circuit through the signal coupling circuit, so that the information is transmitted in two directions, and the carrier sampling has the characteristic of stability.

Preferably, the acquisition terminal comprises a power acquisition unit, an analog-to-digital conversion unit, an operational amplification unit and an output unit which are sequentially connected, and the output unit is connected with the communication module. The power acquisition unit samples current and voltage signals from external connection, performs filtering protection and isolation processing and outputs analog quantity signals to the operational amplification unit, the operational amplification unit amplifies the signals and outputs the amplified signals to the analog-to-digital conversion unit for analog-to-digital conversion, and then the amplified signals are transmitted to the communication module through the output unit.

Preferably, the access terminal comprises a PC terminal and a handheld device.

The utility model has the advantages that: adopt loRa communication and carrier communication dual communication mode, ensure the integrality of thing allies oneself with information data acquisition, need not to increase extra circuit, improve the integrality of data information collection and transmission under the prerequisite of avoiding cost and circuit complexity to increase.

Drawings

Fig. 1 is a schematic circuit connection structure diagram of the present invention.

Fig. 2 is the utility model discloses an interactive piping diagram of loRa equipment.

In the figure, 1 acquisition terminal, 2 communication module, 2.1 wireless communication module, 2.2 wired communication module, 3MCU, 4 monitoring management cloud platform, 5 access terminal and 6GPS positioning module.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

Example (b): the dual-channel communication system of the LoRa ad hoc network of the embodiment is shown in fig. 1, and includes an acquisition terminal 1, a communication module 2, an MCU3, a monitoring management cloud platform 4 and an access terminal 5, which are connected in sequence, where the access terminal 5 includes a PC terminal and a handheld device. The acquisition terminal 1 is connected with a GPS positioning module 6. The acquisition terminal is installed and is used for realizing data acquisition on treating the acquisition equipment, and communication module carries out data transmission through radio communication and wired communication two kinds of modes and ensures the integrality of transmission information, and MCU carries out data summary sum and handles, and control management cloud platform is used for having remote access and the optimization of gathering with transmission information storage to the high in the clouds, and access terminal is used for the staff to realize looking over the long-range of data of gathering.

The acquisition terminal 1 comprises a power acquisition unit, an analog-to-digital conversion unit, an operational amplification unit and an output unit which are sequentially connected, wherein the output unit is connected with the communication module 2. The power acquisition unit samples current and voltage signals from external connection, performs filtering protection and isolation processing and outputs analog quantity signals to the operational amplification unit, the operational amplification unit amplifies the signals and outputs the amplified signals to the analog-to-digital conversion unit for analog-to-digital conversion, and then the amplified signals are transmitted to the communication module through the output unit.

The communication module 2 comprises a wireless communication module 2.1 and a wired communication module 2.2, the wireless communication module 2.1 is in wireless connection with the acquisition terminal 1, and the wired communication module 2.2 is connected with the acquisition terminal 1 through a power transmission line. The wired communication module comprises a zero-crossing detection circuit, a signal sending circuit, a signal coupling circuit, a signal receiving and filtering circuit and a zero-crossing synchronization circuit which are sequentially connected, wherein the input control end of the signal coupling circuit is connected with an electric wire, and the input end of the zero-crossing detection circuit and the output end of the zero-crossing synchronization circuit are connected with a carrier signal. The carrier wave judges sampling time through a zero-crossing detection circuit, and signals to be transmitted are sent through a signal sending circuit and are coupled to an electric wire through a signal coupling circuit for transmission; the information transmitted on the wire is also transmitted to the signal receiving filter circuit and the zero-crossing synchronization circuit through the signal coupling circuit, so that the information is transmitted in two directions, and the carrier sampling has the characteristic of stability.

Wireless communication module 2.1 includes loRa collection module and loRa antenna, loRa antenna and collection terminal wireless connection, loRa collection module links to each other with MCU 3. In order to avoid network congestion caused by occupying a wake-up channel for a long time during big data interaction. The large data packet interaction adopts a frequency hopping communication mechanism. In addition, the scheme greatly reduces the sending times of the wake-up frame and reduces the power consumption overhead of the whole network. The specific flow of frequency hopping communication is as follows: the requesting device completes the wake-up of the high level idle relay on the wake-up channel CH 0. And the wake-up frame contains the working channel CHA that will subsequently send the application frame. And after being analyzed by the awakened device, monitoring the CHA channel at a specified moment. And after the wake-up frame is sent, the application device sends an application frame in a channel CHA. And receiving the relay of the application frame, and selecting a slot to send the permission frame in the CHA channel if the comprehensive evaluation meets the receiving condition, wherein the permission frame comprises a large data interaction channel CHx information application device to screen a plurality of received permission frames, and selecting the optimal relay, and the relay is supposed to work in the CHB channel. And the application equipment skips the CHB channel to carry out frame transmission of the big data until all the data are sent to the selected equipment.

During operation, install the acquisition terminal who treats on the collection equipment and carry out data acquisition, communication module carries out data transmission respectively through wireless loRa communication and wired carrier communication two kinds of modes, MCU carries out data collection and handles, ensures the integrality of transmission information, then transmits to control management cloud platform and be used for having remote access and the optimization of gathering with transmission information storage to the high in the clouds, and the staff visits control management cloud platform through access terminal and is used for realizing looking over the long-range of data collection.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms acquisition terminal, communication module, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims (6)

1. The utility model provides a two-way communication system of loRa ad hoc network, its characterized in that, including acquisition terminal (1), communication module (2), MCU (3), control management cloud platform (4) and access terminal (5) that link to each other in proper order, acquisition terminal (1) links to each other (6) with GPS orientation module.

2. A two-way communication system of an LoRa ad hoc network according to claim 1, wherein the communication module (2) comprises a wireless communication module (2.1) and a wired communication module (2.2), the wireless communication module (2.1) is wirelessly connected with the acquisition terminal (1), and the wired communication module (2.2) is connected with the acquisition terminal (1) through a power line.

3. A two-way communication system of an LoRa ad hoc network according to claim 2, wherein the wireless communication module (2.1) comprises an LoRa acquisition module and an LoRa antenna, the LoRa antenna is wirelessly connected with an acquisition terminal, and the LoRa acquisition module is connected with the MCU (3).

4. The dual-channel communication system of the LoRa ad hoc network of claim 2, wherein the wired communication module comprises a zero-crossing detection circuit, a signal transmission circuit, a signal coupling circuit, a signal receiving filter circuit and a zero-crossing synchronization circuit, which are connected in sequence, wherein an input control end of the signal coupling circuit is connected with a wire, and an input end of the zero-crossing detection circuit and an output end of the zero-crossing synchronization circuit are connected with a carrier signal.

5. The two-way communication system of the LoRa ad hoc network according to claim 1, wherein the collection terminal (1) comprises a power collection unit, an analog-to-digital conversion unit, an operational amplification unit and an output unit which are connected in sequence, and the output unit is connected with the communication module (2).

6. A two-way communication system of an LoRa ad hoc network according to claim 1, wherein the access terminal (5) includes a PC terminal and a handheld device.

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