CN216901400U

CN216901400U - LoRa changes 485 data transmission terminal equipment

Info

Publication number: CN216901400U
Application number: CN202220324026.1U
Authority: CN
Inventors: 王彬杰; 王彦凯; 陈永威; 徐海; 佟亚波; 华高坚; 蒋磊; 白娓娓
Original assignee: Hangzhou Hailian Iot Technology Co ltd
Current assignee: Hangzhou Hailian Iot Technology Co ltd
Priority date: 2022-02-17
Filing date: 2022-02-17
Publication date: 2022-07-05
Anticipated expiration: 2032-02-17

Abstract

The utility model provides data transmission terminal equipment for converting LoRa into 485. LoRa changes 485 data transmission terminal equipment and includes power supply unit, main control unit, LoRa communication unit, GNSS unit, 485 communication unit and debugging interface, the main control unit LoRa communication unit the GNSS unit with 485 communication unit all with power supply unit is connected, LoRa communication unit the GNSS unit with 485 communication unit all with the main control unit is connected. The LoRa to 485 data transmission terminal equipment provided by the utility model has the advantages that the double-MCU controller design is adopted, the master controller and the radio frequency controller are respectively made, the expansibility and the flexibility of the equipment are enhanced, the GPS module is added and used for acquiring accurate positioning information, the structural design is optimized, the waterproof effect is realized, and the outdoor use is supported.

Description

LoRa changes 485 data transmission terminal equipment

Technical Field

The utility model relates to the technical field of intelligent control, in particular to LoRa to 485 data transmission terminal equipment.

Background

The existing 485 data transmission terminal equipment (or called as 485RTU) mostly adopts transmission modes such as 4G, 2G, Ethernet, Wi-Fi and the like. And mostly to indoor scene, do not carry out waterproof design.

The common defects of the schemes are high power consumption, inapplicable to low-power-consumption scenes powered by batteries, lack of waterproof design, incapability of being used outdoors and no geographic position information acquisition capability. In addition, cellular network schemes such as 4G or 2G require operator network coverage support. The Ethernet needs to be provided with network cables, and the installation is inconvenient. The Wi-Fi scheme is limited in transmission distance.

Therefore, it is necessary to provide a new LoRa to 485 data transmission terminal device to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to provide a LoRa to 485 data transmission terminal device which adopts the design of double MCU controllers, respectively serves as a main control and a radio frequency controller, enhances the expansibility and flexibility of the device, adds a GPS module for acquiring accurate positioning information, optimizes the structural design, realizes the waterproof effect and supports the outdoor use.

In order to solve the technical problem, the LoRa to 485 data transmission terminal device provided by the utility model comprises a power supply unit, a main control unit, a LoRa communication unit, a GNSS unit, a 485 communication unit and a debugging interface, wherein the main control unit, the LoRa communication unit, the GNSS unit and the 485 communication unit are all connected with the power supply unit, and the LoRa communication unit, the GNSS unit and the 485 communication unit are all connected with the main control unit.

Preferably, the power supply supplies power to the 485 communication unit by buck-boost DCDC, the TTL-to-RS 485 communication unit supplies power by an isolation power supply, and the power supply supplies power to other units by LDOs with high power supply ripple rejection ratio.

Preferably, the main control unit adopts an STM32L051 MCU.

Preferably, the loRa communication unit adopts an independent MCU as a controller, adopts an MCU in the same series with the main control unit, and integrates an SX1268 LoRa radio frequency transceiver.

Preferably, the GNSS unit supports a GPS and beidou dual positioning system, and is configured to implement time synchronization between devices and location management of a user on the devices.

Preferably, the 485 communication unit adopts an isolation design and a lightning protection design and supports a 485-modbus protocol.

Preferably, the system further comprises a debugging interface unit, wherein the debugging interface unit is used for development and maintenance of developers.

Advantageous effects

The LoRa to 485 data transmission terminal equipment has wide market application prospect in the field of Internet of things, is in modular design, conveniently supports various communication protocols to realize multimode communication, accelerates development speed, reduces development cost of products, and is convenient to maintain. The application range of the gateway is expanded by the waterproof design and the 485 isolation lightning protection design, and the application scene is wide. The GNSS information acquisition capability realizes time synchronization between the devices, and simultaneously facilitates the management of the devices by users.

Drawings

Fig. 1 is an overall framework of a LoRa to 485 data transmission terminal device provided by the present invention;

fig. 2 is a circuit block diagram of the LoRa to 485 data transmission terminal device provided by the present invention;

FIG. 3 is a circuit diagram of DCDC-12V of the power supply unit shown in FIG. 2;

fig. 4 is a circuit diagram of 485VCC of the power supply unit shown in fig. 2;

FIG. 5 is a circuit diagram of LDO-3.3V of the power supply unit shown in FIG. 2;

FIG. 6 is a circuit diagram of the master control unit shown in FIG. 2;

fig. 7 is a circuit diagram of the LoRa communication unit shown in fig. 2;

FIG. 8 is a circuit diagram of the GNSS unit shown in FIG. 2;

fig. 9 is a circuit diagram of the 485 communication unit shown in fig. 2;

fig. 10 is a circuit diagram of the debug interface shown in fig. 1.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the utility model will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the utility model and that it is not intended to limit the utility model to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that in the description of the present invention, the terms "in", "upper", "lower", "lateral", "inner", etc. indicate directions or positional relationships based on those shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1-10, in the present embodiment, the LoRa to 485 data transmission terminal device includes: the device comprises a power supply unit, a main control unit, a LoRa communication unit, a GNSS unit, a 485 communication unit and a debugging interface unit. The wireless communication unit is controlled by the independent MCU, decoupled and independent from the main control unit, and is used as a data interface with the main control unit through uart.

A power supply unit: in order to meet the wide-range and wide-input range of 9-18 volts, 485 equipment is powered by buck-boost DCDC with a wide input range (as shown in fig. 3), TTL-to-RS 485 equipment is powered by an isolated power supply (as shown in fig. 4), and other units are powered by LDOs (low dropout regulators) (as shown in fig. 5) with high power supply ripple rejection ratio, so that the influence of noise on a radio frequency unit is reduced.

The main control unit: an STM32L051 MCU (shown in figure 6) of ultra-low power consumption series is adopted. When the device is powered by a battery, excellent low power consumption performance can be achieved.

LoRa communication unit: the LoRa communication unit adopts an independent MCU as a controller and adopts an MCU which is in the same series with the main control. And integrates an SX1268 LoRa radio frequency transceiver (shown in fig. 7).

A GNSS unit: the GPS and Beidou dual-positioning system is supported, so that time synchronization between the devices can be realized, and meanwhile, the devices are convenient for a user to manage (as shown in figure 8).

A 485 communication unit: and an isolation design and a lightning protection design are adopted, a 485-modbus protocol is supported, and the sensor equipment with various 485 interfaces is conveniently accessed (as shown in figure 9).

Debugging an interface: mainly used for development and maintenance by developers (as shown in fig. 10).

1. The system adopts an SX1268 sub-GHz radio transceiver at radio frequency. The physical layer adopts the LoRa modulation technology, and has the characteristics of long transmission distance, low power consumption and no need of operator support.

2. The design of double MCUs, the system adopts STM32L0 series low-power consumption MCU of double ARM Cortex M0+ kernel as the controller. One of the two devices is used as a master control for scheduling a radio frequency unit, 485 equipment, a GPS and the like and controlling the dormancy of the whole machine so as to realize low power consumption. The other MCU (radio frequency controller) is specially used for running networking protocols, radio frequency chip control and the like. By operating different networking protocols, the radio frequency controller can form networks with different topologies such as star type, tree type, MESH type and the like, the deployment is flexible, and the coverage range and the use scene are expanded.

3.485 the circuit adopts isolation and lightning protection design, improves equipment reliability.

4. Adopt GPS + big dipper two star satellite positioning modules, therefore equipment can acquire accurate position and time information, and convenience of customers manages equipment based on position information, can realize the time synchronization between equipment simultaneously.

5. Waterproof construction design, this design shell adopt the aluminium system waterproof shell that has waterproof rubber ring, and all external interfaces all adopt waterproof antenna N head, glan head and aviation plug to use silicon rubber to strengthen joint department is waterproof, realize I P67 water-proof effects, support outdoor use, the extension uses the scene

Compared with the related art, the LoRa to 485 data transmission terminal equipment provided by the utility model has the following beneficial effects:

the LoRa to 485 data transmission terminal equipment has wide market application prospect in the field of Internet of things, and has already been used in projects at present. The modular design is convenient to support various communication protocols to realize multimode communication, the development speed is accelerated, the development cost of products is reduced, and the maintenance is convenient. The application range of the gateway is expanded by the waterproof design and the 485 isolation lightning protection design, and the application scene is wide. The GNSS information acquisition capability realizes time synchronization between the devices, and simultaneously facilitates the management of the devices by users.

So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the utility model, and the technical scheme after the changes or substitutions can fall into the protection scope of the utility model.

Claims

1. The utility model provides a loRa changes 485 data transmission terminal equipment, its characterized in that, includes power supply unit, main control unit, loRa communication unit, GNSS unit, 485 communication unit and debugging interface, the main control unit loRa communication unit the GNSS unit with 485 communication unit all with power supply unit is connected, loRa communication unit the GNSS unit with 485 communication unit all with the main control unit is connected.

2. The LoRa-to-485 data transmission terminal device according to claim 1, wherein the power supply supplies power to the 485 communication unit by buck-boost DCDC, the TTL-to-RS 485 communication unit by isolated power supply, and the power supply supplies power to other units by LDO with high power supply ripple rejection ratio.

3. The LoRa to 485 data transmission terminal device of claim 2, wherein the main control unit employs an STM32L051 MCU.

4. The LoRa-to-485 data transmission terminal device according to claim 3, wherein the LoRa communication unit uses an independent MCU as a controller, uses an MCU in the same series with the main control unit, and integrates an SX1268 LoRa radio frequency transceiver.

5. The LoRa-to-485 data transfer terminal device according to claim 4, wherein the GNSS unit supports GPS and Beidou dual positioning systems, and is used for time synchronization between devices and location management of the devices by users.

6. The LoRa-to-485 data transmission terminal device according to claim 5, wherein the 485 communication unit is isolated and lightning protected, and supports 485-modbus protocol.

7. The LoRa-to-485 data transmission terminal device according to claim 6, further comprising a debugging interface unit, wherein the debugging interface unit is used for development and maintenance by developers.