Low-power-consumption communication system

Abstract

The invention provides a low power consumption communication system, which comprises a digital interface, a digital isolator, a data processing module, a classifier and a plurality of different hardware communication circuits, and is characterized in that the digital interface is connected with the data processing module through the digital isolator, and the data processing module is connected with the plurality of different hardware communication circuits through the classifier; the data processing module controls the classifier to select different hardware communication circuits according to the communication mode, so that the hardware communication circuits are automatically switched; the communication system is equipped with a power supply, the power supply management module comprises a plurality of power supply switch circuits, the power supply is respectively connected with a plurality of different hardware communication circuits through the plurality of power supply switch circuits, the power supply switch circuits are all connected with the data processing module, and the data processing module controls output of high and low levels according to a communication mode. Therefore, the on-off of the corresponding power supply switch circuit is controlled, the power supply of the corresponding hardware communication circuit is realized, and the power consumption of the communication system is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a low-power consumption communication system. Background Art

[0002] With the development of Internet of Things technology, in the design and use of electronic products, network communication functions are often required to ensure that electronic devices are connected to the network. At present, there are two main solutions for electronic equipment to access the network. One is to expand the communication module externally for finished equipment, but the adaptability of the communication environment of this solution will be lower. Different communication methods often require the replacement of different modules. Manual switching of each module is cumbersome and may also bring multiple failure risk points, which reduces the development efficiency in terms of software initialization configuration and hardware design. The other is to integrate the required communication circuits into the same system according to user needs during the research and development stage. For example, patent CN105528316A discloses a multifunctional communication module with RS485 communication interface, RS232 communication interface and RJ45 communication interface, which meets the communication equipment using different communication interfaces such as RS485, RS232 or RJ45. However, in this patent, RS485, RS232 or RJ45 are all connected to the PLC controller, and the selection of its communication method requires manual selective connection to the PLC controller, which is cumbersome. Moreover, there are often many ways to access the network, such as serial port, Bluetooth, Wifi, 4G or 5G, etc. If all are integrated into the system, although the design requirements can be met, the power consumption of the entire system will also increase. For some outdoor equipment, especially those powered by solar cells, such equipment usually needs to be online for a long time, and the power consumption requirements are particularly high. The cost of solar power supply is closely related to the power consumption of the equipment. Increased power consumption means a sharp increase in costs. Summary of the invention

[0003] The present invention provides a low-power communication system, which integrates network communication circuits such as RJ45, WIFI and 4G and serial communication circuits such as RS232 and RS485. The data processing module realizes automatic switching of hardware communication circuits by controlling a selector, and can automatically control the corresponding communication circuits to supply power according to different communication modes, thereby effectively reducing the power consumption of the communication system.

[0004] In order to solve the above technical problems, the technical solution of the present invention is:

[0005] A low-power communication system is installed in a main device and is used for communication between the main device and an external device. The communication system includes a digital interface, a digital isolator, a data processing module, a sorter and a plurality of different hardware communication circuits. The external device is connected to the digital interface, the digital interface is connected to the data processing module through the digital isolator, the data processing module is connected to the plurality of different hardware communication circuits through the sorter, the sorter adopts a single-ended 8-channel multi-way switch, and the sorter uses two sets of multi-way switches independently designed for data reception and transmission; the data flow of the external device is transmitted to the data processing module through the digital interface, and the data processing module controls the sorter to select different hardware communication circuits according to the communication mode, so as to realize automatic switching of the hardware communication circuit; the communication system is equipped with a power supply, and is powered by the power supply; the communication system also includes a power management module, the power management module includes a plurality of power supply switch circuits, the power supply is respectively connected to the plurality of different hardware communication circuits through the plurality of power supply switch circuits, the power supply switch circuits are all connected to the data processing module, the data processing module controls the output of high and low levels according to the communication mode, thereby controlling the on and off of the corresponding power supply switch circuit, so as to realize the power supply of the corresponding hardware communication circuit.

[0006] The data processing module uses a Cotex-M4 processor with RTOS.

[0007] The data processing module is connected to a memory, and the data processing module automatically loads an algorithm from the memory to process data frames according to the type of protocol.

[0008] The hardware communication circuit at least includes RJ45, WIFI and 4G network communication circuits and RS232 and RS485 serial port communication circuits.

[0009] The power supply switch circuit adopts two MOS tubes connected back to back.

[0010] The power supply is provided with an overcurrent and reverse connection protection circuit and an isolation DC-DC circuit.

[0011] The digital interface adopts a UART interface.

[0012] Compared with the prior art, the beneficial effects of the present invention are: (1) The communication module provided by the present invention integrates network communication circuits such as RJ45, WIFI and 4G and serial communication circuits such as RS232 and RS485, integrating commonly used network and serial port functions. The data processing module realizes automatic switching of hardware communication circuits by controlling the selector without manual switching.

[0013] (2) The power management module in the present invention supplies power to each hardware communication circuit separately through a power switch circuit, and automatically controls the corresponding communication circuit to supply power according to different communication modes, which can effectively reduce the power consumption of the communication system. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A functional block diagram of a low-power communication system provided by the present invention;

[0015] Figure 2 is a circuit diagram of a data processing module in the present invention;

[0016] Figure 3 is a circuit diagram of the sorter in the present invention;

[0017] Figure 4 A block diagram showing the connection between the communication system and the power supply in the present invention;

[0018] Figure 5 It is a power supply switch circuit diagram corresponding to the RJ45 network communication circuit in the present invention; DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] The low-power communication system provided in this embodiment is installed in the main device and is used to communicate with the external device. The communication system includes a digital interface, a digital isolator, a data processing module, a sorter and a variety of different hardware communication circuits. Specifically, the communication system is installed in the main device, and the main device is connected to the digital interface of the communication system.

[0021] The digital interface is connected to the external device. Specifically, the digital interface adopts a UART interface for receiving and sending data streams. The digital interface is connected to the data processing module through a digital isolator. The communication system is isolated from the main device through the digital isolator to protect the circuits in the communication system. The digital isolator adopts a magnetically coupled dual-channel digital isolator. The data processing module is connected to a variety of different hardware communication circuits through a sorter. The data stream of the external device is transmitted to the data processing module through the digital interface. The data processing module controls the sorter to select different hardware communication circuits according to the communication mode to realize automatic switching of the hardware communication circuit.

[0022] In this embodiment, the data processing module uses a Cotex-M4 processor with an RTOS, such as Figure 2 As shown, the circuit of the data processing module mainly includes the STM32 minimum system. The data stream will enter the data processing module through the UART2 pin. The data processing module outputs control signals from the A0, A1 and A2 pins to control the sorter according to the communication mode. At the same time, the data processing module is connected to a memory. The data processing module automatically loads the algorithm from the memory to process the data frame according to the protocol type, processes the data frame and packages it into a corresponding application layer protocol. The code and temporary data generated during the packaging process will be placed in the memory.

[0023] In this embodiment, the sorter adopts a single-ended 8-channel multi-way switch CD4051. Figure 3 As shown, the sorter is designed using a CMOS single-channel 8-channel analog multiplexer and a multiplexer with a logic level conversion function. The sorter uses two sets of multiplexer switches to be independently designed for data transmission and reception.

[0024] In this embodiment, the hardware communication circuit includes network communication circuits such as RJ45, WIFI and 4G, and serial communication circuits such as RS232 and RS485. Specifically, the RJ45 network communication circuit uses the network serial port transparent transmission chip CH9121; the WIFI network communication circuit uses the USR-WIFI232-B2 module; and the 4G network communication circuit uses the WH-LTE-7S1 module.

[0025] The communication system is equipped with a power supply, which is used to supply power to the communication system. Specifically, the power supply is connected to the digital interface, the digital isolator, the data processing module, the memory, the sorter, and each hardware communication circuit to supply power to each module. Figure 4 As shown. Since the system integrates many hardware communication circuits, resulting in increased power consumption, the communication system in this embodiment also includes a power management module, through which each hardware communication circuit adopts a separate power control. Specifically, the power management module includes multiple power supply switch circuits, and the power supply is respectively connected to a variety of different hardware communication circuits through multiple power supply switch circuits. The power supply switch circuits are all connected to the data processing module. The data processing module controls the output high and low levels of the IO port according to the user's communication method, thereby controlling the on and off of the corresponding power supply switch circuit, and automatically controlling the corresponding hardware communication circuit to supply power. Specifically, the power supply switch circuit uses two MOS tubes to connect the circuit back to back. Taking the RJ45 network communication circuit as an example, its corresponding power supply switch circuit is as follows Figure 5 Furthermore, the power supply is provided with an overcurrent and reverse connection protection circuit and an isolation DC-DC circuit.

[0026] The working process of the low-power communication system provided in this embodiment is as follows: both the external device and the main device are connected to the communication system through a digital interface, the communication system selects the communication mode and protocol type through the AT command, configures the corresponding communication parameter information, and then exits the configuration mode to enter the data transparent transmission mode. The data stream of the external device enters the communication system through the digital interface, and the communication system is isolated from the main device and the external device through the digital isolator to improve the quality of the communication signal; after the data stream enters the data processing module, the corresponding algorithm will be loaded according to the user's communication mode and protocol type to encapsulate and process the data frame. At the same time, the data processing module will control the sorter to select different hardware communication circuits according to the communication mode, thereby realizing automatic switching of the hardware communication circuit. After being processed by the data processing module, the data will be sent through the corresponding hardware communication circuit. After the communication system receives the data from the external device, it will enter the data processing module, process the data according to different protocol types to retain useful information, and finally transmit the received data to the main device through the serial port line. In addition, the power supply management circuit is responsible for supplying power to each functional module. In terms of low power consumption, a unique back-to-back connection method of two MOS tubes is adopted, and the unused circuit will be powered off, which greatly reduces power consumption.

Claims

1. A low-power communication system installed in a main device and used for communication between the main device and an external device, characterized in that: The communication system includes a digital interface, a digital isolator, a data processing module, a sorter and a variety of different hardware communication circuits. The external device is connected to the digital interface, the digital interface is connected to the data processing module through the digital isolator, the data processing module is connected to the various different hardware communication circuits through the sorter, the sorter adopts a single-ended 8-channel multi-way switch, and the sorter uses two sets of multi-way switches independently designed for data transmission and reception; the data flow of the external device is transmitted to the data processing module through the digital interface, and the data processing module controls the sorter to select different hardware communication circuits according to the communication mode, so as to realize automatic switching of the hardware communication circuit; the communication system is equipped with a power supply, and the power supply is supplied to it by the power supply; The communication system also includes a power management module, which includes multiple power supply switch circuits. The power supply is connected to a variety of different hardware communication circuits through multiple power supply switch circuits. The power supply switch circuits are all connected to the data processing module. The data processing module controls the output high and low levels according to the communication method, thereby controlling the on and off of the corresponding power supply switch circuit to realize the power supply of the corresponding hardware communication circuit.

2. The low power consumption communication system according to claim 1, characterized in that: The data processing module uses a Cotex-M4 processor with RTOS.

3. The low power consumption communication system according to claim 1, characterized in that: The data processing module is connected to a memory, and the data processing module automatically loads an algorithm from the memory to process data frames according to the type of protocol.

4. The low power consumption communication system according to claim 1, characterized in that: The hardware communication circuit at least includes RJ45, WIFI and 4G network communication circuits and RS232 and RS485 serial port communication circuits.

5. The low power consumption communication system according to claim 1, characterized in that: The power supply switch circuit adopts two MOS tubes connected back to back.

6. The low power consumption communication system according to claim 1, characterized in that: The power supply is provided with an overcurrent and reverse connection protection circuit and an isolation DC-DC circuit.

7. The low power consumption communication system according to claim 1, characterized in that: The digital interface adopts a UART interface.

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