Multifunctional regulation and control system based on LoRa networking

Abstract

The utility model provides a multifunctional regulation and control system based on LoRa networking. The multifunctional regulation and control system comprises an RS485 acquisition circuit, a current detection circuit, a voltage detection circuit, an 18B20 acquisition circuit, two on-off buttons, a pcb mainboard, a Lora communication module and a power supply device. The on-off button is connected with the pcb mainboard and controls restarting and program flashing of the pcb mainboard. The power supply device comprises an independent 5-35V DC power supply and a 3.3 V lithium battery power supply, and the current detection circuit and the voltage detection circuit are connected to the pcb mainboard; according to the utility model, long-distance data transmission is realized based on the Lora technology, dynamic power consumption management of each module is realized, the system efficiency is improved through multi-stage voltage regulation, and the modules can rapidly process the acquired data by using the high-efficiency microcontroller.

Description

TECHNICAL FIELD

[0001] The utility model relates to wireless communication remote data acquisition control technology field, concretely is a kind of multifunctional control system based on LoRa networking. BACKGROUND

[0002] The power consumption management problem in the existing Lora acquisition module is mainly due to the fact that the working states of the sensor and the communication module cannot be effectively coordinated, and there is a lack of real-time power consumption monitoring and control of each module. The low integration level is caused by the fact that the interface design is not flexible enough, and the modular expansion is insufficient, which increases the difficulty of development and deployment. In terms of data transmission, the complex wireless environment increases the risk of signal attenuation and interference, making it difficult to achieve stable and reliable transmission.

[0003] To achieve the above object, the utility model provides a kind of multifunctional control system based on LoRa networking, can solve the problem raised in the above background technology. UTILITY MODEL CONTENT

[0004] The utility model takes the following technical solutions to realize:

[0005] A kind of multifunctional control system based on LoRa networking, including RS485 acquisition circuit, current detection circuit, voltage detection circuit, 18B20 acquisition circuit, two open-close buttons, pcb mainboard, Lora communication module, power supply device;

[0006] The open-close button is connected with the pcb mainboard respectively and controls the restart and program flashing of the pcb mainboard;

[0007] The power supply device includes independent 5-35V DC power supply and 3.3V lithium battery power supply, and the current detection circuit and voltage detection circuit are connected to the pcb mainboard.

[0008] Preferably, the lora communication module includes UART interface and microcontroller connected with each other.

[0009] Preferably, the power supply device further includes conversion module and low-dropout regulator, the conversion module is used to step down the input voltage of 35v to 5V, and the low-dropout regulator is used to further stabilize the 5V power supply to 3.3V, using LM2596S-5.0 step-down chip.

[0010] Preferably, a pmos transistor is provided between the 5V voltage generated by the step-down chip and the output voltage of the lithium battery to realize automatic switching of the power supply and the path management of the lithium battery.

[0011] Preferably, the pcb circuit board is internally provided with an INA226 current / voltage sensor, the current detection circuit and the voltage detection circuit are connected with the INA226 current / voltage sensor, for monitoring the voltage and current in the circuit in real time, and transmitting data to the lora communication module.

[0012] Preferably, the RS485 acquisition circuit adopts a 485 communication protocol to realize wired communication between the module and other external devices.

[0013] Preferably, the RS485 acquisition circuit uses a COSMAX13487 chip, the pcb mainboard is provided with a UART1 serial port, a UART2 serial port and an AB conversion interface, and the RS485 acquisition circuit is connected with the UART1 serial port and the AB conversion interface at two ends; the Lora module uses an E220-400T22S chip and is connected to the UART2 serial port of the pcb mainboard.

[0014] Preferably, the data ports of the two 18B20 acquisition circuits are directly connected to the GPIO17 and GPIO18 interfaces in the pcb mainboard, and data can be directly read.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] The utility model realizes long-distance data transmission based on Lora technology, monitors current and voltage data in real time through INA226, realizes dynamic power consumption management of each module in combination with the control of MOS tube, and when some modules do not need to work, MOS tube will power off, reduces overall power consumption, and through power management and voltage conversion, each module adopts 35V to 5V module to reduce high voltage input to 5V, and through LDO, voltage is further stabilized to 3.3V for microcontroller and other low-voltage components. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is 0-10V signal sensor connection schematic diagram of the utility model;

[0018] Figure 2 It is 4-20mA signal sensor connection schematic diagram of the utility model;

[0019] Figure 3 It is RS485 signal sensor connection schematic diagram of the utility model;

[0020] Figure 4 It is temperature sensor connection schematic diagram of the utility model;

[0021] Figure 5 It is LM2596S-5.0 step-down chip working principle diagram of the utility model;

[0022] Figure 6 It is battery charge and discharge principle diagram of the utility model;

[0023] Figure 7 It is step-down chip and lithium battery connection principle diagram of the utility model;

[0024] Figure 8 It is ESP32S3 master control chip working principle diagram of the utility model;

[0025] Figure 9 It is Lora module communication pin schematic diagram of the utility model;

[0026] Figure 10 It is INA226 chip communication principle diagram of the utility model;

[0027] Figure 11 It is RS485 chip level conversion principle diagram of the utility model;

[0028] Figure 12 It is mos tube working principle diagram of the utility model;

[0029] Figure 13 It is button and lever connection principle diagram of the utility model. DETAILED DESCRIPTION

[0030] In order to facilitate understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant drawings, and several embodiments of the utility model are given in the drawings, but the utility model can be realized by different forms, and is not limited to the embodiments described in the text, on the contrary, these embodiments are provided to make the disclosed content of the utility model more thorough and comprehensive.

[0031] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be an intervening element, and when an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element, the terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. The use herein of the terms "and / or" includes a set of one or more associated listed items.

[0033] The application will be further described in conjunction with the drawings.

[0034] Please refer to the drawings Figures 1-3 , including RS485 acquisition circuit, current detection circuit, voltage detection circuit, 18B20 acquisition circuit, two on-off buttons, pcb mainboard, Lora communication module, power supply device;

[0035] The on-off button is connected with the pcb mainboard and controls the restart and program flashing of the pcb mainboard;

[0036] The power supply device includes independent 5-35V DC power supply and 3.3V lithium battery power supply, the current detection circuit and the voltage detection circuit are connected to the pcb mainboard; the lora communication module includes UART interface and microcontroller connected with each other; the conversion module is used for reducing the input voltage of 35v to 5v, the low dropout regulator is used for further stabilizing the 5v power supply to 3.3v, and LM2596S-5.0 step-down chip is used; there is a pmos tube between the 5v voltage generated by the step-down chip and the output voltage of the lithium battery, which realizes the automatic switching of the power supply and the path management of the lithium battery;

[0037] The pcb circuit board is provided with INA226 current / voltage sensor, the current detection circuit and the voltage detection circuit are connected with the INA226 current / voltage sensor, which is used for real-time monitoring of voltage and current in the circuit, and data transmission to lora communication module; the RS485 acquisition circuit adopts 485 communication protocol, realizes wired communication between the module and other external devices; the RS485 acquisition circuit uses COSMAX13487 chip, the pcb mainboard is provided with UART1 serial port, UART2 serial port and AB conversion interface, and the two ends of the RS485 acquisition circuit are connected with UART1 serial port and AB conversion interface respectively; Lora module uses E220-400T22S chip and is connected to UART2 serial port of the pcb mainboard; the data ports of two 18B20 acquisition circuits are directly connected to GPIO17 and GPIO18 interfaces in the pcb mainboard, and data can be directly read.

[0038] The principle of the device is as follows: Lora communication principle: based on Lora technology, the module can realize long-distance data transmission under the premise of low power consumption, and is suitable for wide-area coverage Internet of Things application. Through efficient transmission protocol and modulation mode, the Lora communication module can maintain stable signal transmission in different environments; power consumption optimization: the utility model discloses a real-time monitoring current and voltage data through INA226, combined with the control of MOS tube, realizes the dynamic power consumption management of each module. When some modules do not need to work, the MOS tube will power off, and the overall power consumption is reduced; power management and voltage conversion principle: the module adopts 35V to 5V module to reduce the high voltage input to 5V, and further stabilizes the voltage to 3.3V through LDO for microcontroller and other low-voltage components. Multi-stage voltage regulation improves system efficiency and avoids power consumption problems caused by voltage fluctuation;

[0039] Data processing and collection optimization principle: through the efficient microcontroller, the module can quickly process the collected data. The DMA technology supports low-delay data transmission and processing, combined with edge computing (Edge Computing), reduces unnecessary data transmission and power consumption;

[0040] Wired communication and anti-interference principle: the module adopts 485 communication protocol, has long-distance transmission and strong anti-interference ability, and is suitable for industrial environment with high noise. The differential transmission mode ensures the reliability and stability of the signal; through these technical characteristics, the low-power Lora multifunctional acquisition module of the utility model realizes efficient data acquisition, transmission and energy consumption management.

[0041] Among them, the power supply mode of the lora module is as follows: the sensor interface module is designed to be compatible with multiple sensor types, supporting 4-20mA / 0-10V analog signal sensor, DB18b20 digital temperature sensor, RS485 interface Modbus protocol sensor, etc. This flexible interface design adapts to different application scenarios, and users can access different types of sensors as needed to collect environmental, equipment, energy and other data. In addition, the interface structure is optimized to support plug and play, simplifying the connection steps of the sensor, improving the convenience of installation and debugging, and separating the internal and external power supply. The power supply system of the module adopts internal and external power supply separation design, and the LoRa wireless module can be powered by the internal rechargeable battery, while the sensor can be powered by the external power supply. This design ensures that even when the external power supply of the sensor is disconnected, the module itself can still run continuously and maintain wireless communication function. In addition, the power supply separation design of the sensor and the module battery can avoid the influence of the power consumption of the sensor on the power supply of the LoRa module, and improve the stability and reliability of the system;

[0042] Reference Figures 1-10The circuit connection relationship of the device is as follows: the on-off signal uses a MOS tube as a control circuit at the lower end of the circuit, and a GPIO46 is used to provide voltage for the MOS tube, and the MOS tube is turned on at a high level and is turned off at a low level.

[0043] RS485 uses a COSMAX13487 chip to realize conversion from a TTL level to an RS485 level, one end is connected to a UART1 serial port of a mainboard, and the other end is connected to an A B interface of the mainboard.

[0044] The current and voltage detection circuit uses an INA226 chip, the chip is connected with the mainboard through SDA and SCL, and functions of reading current and voltage are realized.

[0045] The data ports of the two 18B20s are directly connected to GPIO17 and GPIO18 of the mainboard, and data can be directly read.

[0046] The BOOT button is connected to GPIO0, and the RESTART button is connected to the CHIP_PU interface.

[0047] The Lora module uses an E220-400T22S, RX TX is connected to the UART2 interface of the mainboard, M0 and M1 are connected to GPIO3 and GPIO4 of the mainboard respectively, and the switching of receiving and transmitting is realized. AUX is connected to GPIO8 of the mainboard.

[0048] A PMOS tube is arranged between the 5V voltage generated by the step-down chip and the output voltage of the TP5400, and a path management function of automatically switching the power supply and the lithium battery is realized.

[0049] Reference Figures 5-13 The working modes of the modules are as follows:

[0050] Figure 5 In the figure, the LM2596S-5.0 step-down chip is connected with an external DC power supply interface, 5-35V direct current is converted into a stable 5V output, the Q3 PMOS tube on the right is a power path management chip. When there is an external power supply, the gate is supplied with voltage, and then the PMOS tube is turned off, and the path from the battery to the system is closed, and at this time, the external DC power supply is used for power supply. When the external power supply disappears, the gate loses voltage, and at this time, the path from the battery to the power supply is turned on, and the power supply in the system is provided by the lithium battery.

[0051] Figure 6 In the figure, the 5V voltage provided by the LM2596S-5.0 is connected with the TP5400, the BAT and GND ports of the TP5400 are connected with the lithium battery, the TP5400 can control the charging and discharging of the lithium battery, and a stable 5V voltage is output. The voltage will also be supplied to the LDO chip through the path management circuit, and converted into a 3.3V voltage.

[0052] Figure 7In the middle, ME6211C33M5G-N step-down chip, the LM2596S-5.0 chip or lithium battery management chip provides 5V voltage, converted into 3.3V voltage for ESP32S3 chip use.

[0053] Figure 8 In the middle, ESP32S3 chip is the main control chip of the circuit board, controls all the computing and data transceiver tasks of the circuit board. The VDDA, VDD3P3 pins of ESP32S3 are power supply pins, which receive 3.3V power supply. The XTAL_P and XTAL_N pins of ESP32S3 are crystal oscillator pins, which are connected to 40Mhz crystal oscillator to provide stable clock service for the chip.

[0054] Figure 9 In the middle, the GPIO3, GPIO4, GPIO5, GPIO6, GPIO7, GPIO8 pins of ESP32S3 are the communication pins of the Lora module, which provide communication function with the Lora module;

[0055] Figure 10 In the middle, the SDA and SCL pins of ESP32S3 are connected to the SDA and SCL of INA226, realizing the communication function with INA226 chip. The AIN and AG pins of the chip can measure the external current and voltage value;

[0056] Figure 11 In the middle, GPIO1 and GPIO2 of ESP32S3 are the communication pins of RS485 module, which are converted to 485 level through the level conversion of RS485 chip, and communicate with external RS485 equipment through A and B pins of RS485;

[0057] Figure 12 In the middle, MOS tube is a device for controlling power supply to external equipment. GPIO46 of ESP32S3 is connected to the gate of MOS tube. If GPIO46 is set to high level, the source and drain are turned on. At this time, the power supply of external equipment is turned on. If the level of GPIO46 is low, the external power supply function is turned off.

[0058] Figure 13 In the middle, the RST button is connected to the RESET pin of ESP32S3 to control the master control chip to restart. The BOOT button is connected to the G0 pin of ESP32S3 to control the master control chip to enter the firmware flashing mode. The WIFI dial lever is connected to GPIO19. If it is opened, WIFI is turned on. If it is closed, WIFI is turned off.

[0059] The utility model has carried out the exemplary description to the utility model in the above-mentioned combination drawing, obviously the utility model concrete realization is not limited by above-mentioned mode, only if the method conception and technical scheme of the utility model have been used to carry out this kind of non-essential improvement, or the conception and technical scheme of the utility model are directly applied to other occasions without improvement, all are within the protection scope of the utility model.

Claims

1. A multi-functional control system based on LoRa networking, characterized in that: The RS485 acquisition circuit, the current detection circuit, the voltage detection circuit, the 18B20 acquisition circuit, two on-off buttons, a pcb mainboard, a LoRa communication module and a power supply device are included. The on-off buttons are connected with the pcb mainboard and control the restart and program flashing of the pcb mainboard. The power supply device includes an independent 5-35V DC power supply and a 3.3V lithium battery power supply, and the current detection circuit and the voltage detection circuit are connected to the pcb mainboard. 2.The multi-functional regulation system based on LoRa networking according to claim 1, wherein: The LoRa communication module includes a UART interface and a microcontroller connected with each other. 3.The multi-functional regulation system based on LoRa networking according to claim 1, characterized in that: The power supply device further includes a conversion module and a low dropout regulator, the conversion module is used for reducing the input voltage of 35V to 5V, and the low dropout regulator is used for further stabilizing the 5V power supply to 3.3V, and a LM2596S-5.0 step-down chip is used. 4.The multi-functional regulation system based on LoRa networking according to claim 3, characterized in that: A pmos tube is arranged between the 5V voltage generated by the step-down chip and the output voltage of the lithium battery, so as to realize the automatic switching of the power supply and the path management of the lithium battery. 5.The multi-functional regulation system based on LoRa networking according to claim 1, characterized in that: The pcb mainboard is internally provided with an INA226 current / voltage sensor, the current detection circuit and the voltage detection circuit are connected with the INA226 current / voltage sensor, and are used for monitoring the voltage and current in the circuit in real time and transmitting data to the LoRa communication module. 6.The multi-functional regulation system based on LoRa networking according to claim 1, characterized in that: The RS485 acquisition circuit adopts a 485 communication protocol to realize the wired communication between the module and external equipment. 7.The multi-functional regulation system based on LoRa networking according to claim 6, characterized in that: The RS485 acquisition circuit uses a COSMAX13487 chip, the pcb mainboard is provided with a UART1 serial port, a UART2 serial port and an AB conversion interface, and two ends of the RS485 acquisition circuit are connected with the UART1 serial port and the AB conversion interface. The Lora module uses an E220-400T22S chip and is connected to the UART2 serial port of the pcb mainboard. 8.The multi-functional regulation system based on LoRa networking of claim 1, wherein: The data ports of the two 18B20 acquisition circuits are directly connected to the GPIO17 and GPIO18 interfaces in the pcb mainboard, and data can be directly read.

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