Data acquisition equipment for LoRa communication

Abstract

The utility model is suitable for the technical field of information science and technology, and relates to a data acquisition device for LoRa communication, which comprises a main control module, a LoRa communication module, an HPLC module and a power supply module, the MCU of the main control module is connected with the chip U5 of the LoRa communication module through a serial port MCURXD or a serial port MCU-TXD, and is used for uploading the data of the LoRa water meter or the LoRa gas meter acquired by the LoRa module to the MCU of the main control module for processing; the MCU of the main control module is connected with a chip U6 of the HPLC module through a serial port HPLCTXD or a serial port HPLCRXD, and is used for interacting LoRa water meter or LoRa gas meter data acquired by the MCU of the main control module with the HPLC module; and the power supply module is electrically connected with the main control module and the HPLC module and is used for supplying power to the whole data acquisition equipment. The LoRa gas meter data acquisition device is simple in structure and convenient to work, data interaction is carried out between a downlink and a LoRa water meter or a LoRa gas meter through the LoRa communication module, communication is carried out between an uplink and a concentrator through a low-voltage power line by adopting the HPLC module, acquisition is convenient, cost is low, and the difficulty of data acquisition is greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of information technology, and in particular relates to a data acquisition device for LoRa communication. Background Art

[0002] LoRa wireless communication technology is widely used in remote water meter reading systems and remote gas meter reading systems in smart cities due to its long transmission distance, low power consumption, wide coverage, and strong anti-interference ability. The scheme for water meter or gas meter data collection using LoRa communication technology is usually: the LoRa water meter or gas meter collects data and then reports the data at a fixed time; or the LoRa data collection device receives the water meter or gas meter data, and the LoRa data collection device communicates remotely with the main station system through 4G mobile communication, or communicates with the PC through wired methods such as RS485, RS233, USB, and then the concentrator communicates remotely with the main line system. Although the use of 4G communication has the advantages of simple design and strong operability, each LoRa data collection device needs to communicate through mobile communication, which increases the cost of traffic billing. At the same time, it is not suitable for installation in remote areas, basements with poor network signals and other harsh environments. In addition, the use of RS-485, RS485 or USB communication methods will also be limited by the communication distance and the cost of laying cables. Therefore, the existing data collection scheme has the problems of high collection cost and difficulty.

[0003] The patent application with announcement number CN209486883U provides a low-power data acquisition system, including a data collector and a monitoring center data receiving system; the central processor in the data collector is simultaneously connected to a multi-channel analog input and output interface, a multi-channel switch input and output interface, an RS485 communication interface, a LoRa communication unit, a 4G communication unit, and a data storage unit; the multi-channel analog input and output interface is wired to a field sensor, the multi-channel digital input and output interface is wired to a field valve, the RS485 communication interface is wired to a field meter, the LoRa communication unit is wirelessly connected to a LoRa communication to 4G communication gateway module, and the 4G communication unit is wirelessly connected to a 4G operator network. This patent is the same as the prior art, and also uses 4G communication for communication, and multiple data collectors are connected at the same time. The acquisition cost is still high, and the acquisition difficulty is also relatively large in application scenarios where there is no network coverage and the network signal is poor.

[0004] Therefore, how to provide a data acquisition device with low acquisition cost, convenient acquisition and low difficulty is an urgent problem to be solved by personnel in this technical field. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a data acquisition device for LoRa communication, and to solve the problems of high acquisition cost and difficulty of data acquisition solutions in the prior art.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] The utility model provides a data acquisition device for LoRa communication, comprising: a main control module, a LoRa communication module, an HPLC module and a power module; the MCU of the main control module is connected to a chip U5 of the LoRa communication module through a serial port MCU_RXD or a serial port MCU-TXD, and is used for uploading the data of a LoRa water meter or a LoRa gas meter acquired by the LoRa module to the MCU of the main control module for processing; the MCU of the main control module is connected to a chip U6 of the HPLC module through a serial port HPLC_TXD or a serial port HPLC_RXD, and is used for interacting the LoRa water meter or LoRa gas meter data acquired by the MCU of the main control module with the HPLC module; the power module is electrically connected to the main control module and the HPLC module respectively, and is used for powering the entire data acquisition device.

[0008] Furthermore, it also includes an RS485 conversion module, and the MCU of the main control module is connected to the RS485 conversion module via the serial port RS485_TX or the serial port RS485_RX, so that the data acquisition device directly exchanges data with the PC end through the RS485 port, and the RS485 conversion module is also electrically connected to the power module.

[0009] Furthermore, it also includes a WIFI module, and the MCU of the main control module is connected to the chip U2 of the WIFI module through the serial port WI-FI_TX or the serial port WI-FI_RX, so as to perform function upgrades through remote WIFI.

[0010] Furthermore, it also includes a memory module, which includes a FLASH memory and an EPROM memory. The MCU of the main control module is connected to the chip U12 of the FLASH memory through an SPI interface, and the MCU of the main control module is connected to the chips U7 and U8 of the EPROM memory respectively through an I2C interface.

[0011] Furthermore, it also includes a main power supply power-off detection module and an RTC battery detection module. The MCU of the main control module is connected to the main power supply power-off detection module through an ADC sampling interface PowerDownDetect, and is connected to the RTC battery detection module through another ADC sampling interface VBAT_CHECK.

[0012] Furthermore, it also includes an indicator light module, and the MCU of the main control module is connected to the indicator light module through the GPIO interface LED_NET.

[0013] Furthermore, the indicator light module includes a power supply and main control status indicator light circuit, a LoRa communication module indicator light circuit, a 485 communication indicator light circuit and an HPLC module indicator light circuit. The power supply and main control status indicator light circuit, the LoRa communication module indicator light circuit and the 485 communication indicator light circuit are respectively connected to the chip U4 of the MCU of the main control module, and the HPLC module indicator light circuit is connected to the HPLC module.

[0014] Furthermore, it also includes a 12V to 3.6V main power module, and the main control module and the power module are connected through the 12V to 3.6V main power module.

[0015] Furthermore, it also includes a farad capacitor charging and discharging module, one side of the farad capacitor charging and discharging module is connected to the 12V to 3.6V main power supply module, and the other side is connected to the main control module.

[0016] Furthermore, the GPIO interface RS_DE or GPIO interface RS_RE of the MCU of the main control module is connected to the RS485 conversion module, the GPIO interface ShutDown and the GPIO interface RST_M are connected to the LoRa communication module, the GPIO interface LED_LoRaRX or the GPIO interface LED_LoRaTX, the GPIO interface LED_RS485RX or LED_RS485TX are connected to the indicator light module shown, and the GPIO interfaces WI-FI_RESET and WI-FI_PWR_SW are connected to the WIFI module.

[0017] Compared with the prior art, the data acquisition device for LoRa communication provided by the utility model has at least the following beneficial effects:

[0018] Most existing data collection solutions use 4G communication methods for communication, and multiple data collectors are connected at the same time, which has a high collection cost. It is also difficult to collect data in application scenarios without network coverage or with poor network signals. The utility model uses the LoRa communication module to interact with the LoRa water meter or LoRa gas meter for data in the downlink. LoRa is designed in a modular way, supports plugging and replacement, and has universality. It can be used with LoRa meters with different working frequency bands. It only needs to replace the LoRa modules corresponding to different frequency bands, and the other parts of the circuit can be used universally. The data collection equipment of the utility model interacts with the concentrator through the low-voltage power line in the uplink. The concentrator communicates with the main station system remotely through 4G. One concentrator can correspond to multiple data collection devices, reducing the data flow billing of existing data collection devices through independent 4G remote communication, and the cost is relatively low. The utility model adopts an HPLC module to communicate with the concentrator via a low-voltage power line on the uplink, which increases the communication distance compared to existing data acquisition devices using RS485 communication, USB communication and the like, so that the product can be used in remote places with poor network signals or no network coverage, reducing the difficulty of collecting data. At the same time, the data acquisition device of the utility model is also provided with an RS485 communication module, which can be compatible with existing data acquisition communication methods and has high compatibility. The data acquisition device of the utility model is also provided with a WIFI module, which can be remotely upgraded via WIFI in some places that are not suitable for opening the cover for upgrading, thereby enhancing the maintainability and flexibility of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the scheme of the utility model, a brief introduction is given below to the figures required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A structural block diagram of a data acquisition device for LoRa communication provided by an embodiment of the utility model;

[0021] Figure 2 A circuit diagram of a main control module of a data acquisition device for LoRa communication provided by an embodiment of the utility model;

[0022] Figure 3 A LoRa communication power supply control circuit diagram of a data acquisition device for LoRa communication provided by an embodiment of the utility model;

[0023] Figure 4 A LoRa communication module circuit diagram of a data acquisition device for LoRa communication provided by an embodiment of the utility model;

[0024] Figure 5 A circuit diagram of an HPLC module of a data acquisition device for LoRa communication provided by an embodiment of the utility model;

[0025] Figure 6 A power module circuit diagram of a data acquisition device for LoRa communication provided by an embodiment of the utility model;

[0026] Figure 7 A circuit diagram of an RS485 communication module for a data acquisition device for LoRa communication provided by an embodiment of the utility model;

[0027] Figure 8 A WIFI module circuit diagram of a data acquisition device for LoRa communication provided by an embodiment of the utility model;

[0028] Fig. 9 A FLASH memory circuit diagram of a memory module of a data acquisition device for LoRa communication provided by an embodiment of the utility model;

[0029] Fig.10 An EPROM memory circuit diagram of a memory module of a data acquisition device for LoRa communication provided by an embodiment of the utility model;

[0030] Fig.11 A circuit diagram of a main power failure detection module for a data acquisition device for LoRa communication provided by an embodiment of the utility model;

[0031] Fig.12 An RTC circuit diagram of an RTC battery detection module of a data acquisition device for LoRa communication provided by an embodiment of the utility model;

[0032] Fig.13 An RTC battery and detection circuit diagram of an RTC battery detection module of a data acquisition device for LoRa communication provided by an embodiment of the utility model;

[0033] Fig.14 A power supply and main control status indicator light circuit diagram of an indicator light module of a data acquisition device for LoRa communication provided by an embodiment of the utility model;

[0034] Fig.15 A LoRa communication module indicator light circuit diagram of an indicator light module of a data acquisition device for LoRa communication provided by an embodiment of the utility model;

[0035] Fig.16 A 485 communication indicator light circuit diagram of an indicator light module of a data acquisition device for LoRa communication provided by an embodiment of the utility model;

[0036] Fig.17 The utility model embodiment provides a data acquisition device for LoRa communication, which is an HPLC module indicator light circuit diagram of an indicator light module;

[0037] Fig.18 A circuit diagram of a 12V to 3.6V main power module for a data acquisition device for LoRa communication provided by an embodiment of the utility model;

[0038] Fig.19 A circuit diagram of a farad capacitor charging and discharging module of a data acquisition device for LoRa communication provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0039] Unless otherwise defined, all technical and scientific terms used in this document have the same meaning as commonly understood by technicians in the technical field of the present invention; the terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. For example, the directions or positions indicated by terms such as "length", "width", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", and "outside" are based on the directions or positions shown in the drawings, which are only for the convenience of description and cannot be understood as limitations on the present technical solution.

[0040] The terms "including" and "having" and any variations thereof in the specification and claims of the utility model and the above-mentioned drawings are intended to cover non-exclusive inclusions; the terms "first", "second", etc. in the specification and claims of the utility model or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In the specification and claims of the utility model and the above-mentioned drawings, when an element is referred to as "fixed to" or "mounted on" or "disposed on" or "connected to" another element, it may be directly or indirectly located on the other element. For example, when an element is referred to as "connected to" another element, it may be directly or indirectly connected to the other element.

[0041] In addition, the reference to "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0042] The utility model provides a data acquisition device for LoRa communication, which is applied to the data acquisition process of LoRa water meter or LoRa gas meter, and in some cases can also be applied to the data acquisition of other devices. The data acquisition device for LoRa communication includes:

[0043] Main control module, LoRa communication module, HPLC module and power module; the MCU of the main control module is connected to the chip U5 of the LoRa communication module through the serial port MCU_RXD or the serial port MCU-TXD, and is used to upload the data of the LoRa water meter or LoRa gas meter collected by the LoRa module to the MCU of the main control module for processing; the MCU of the main control module is connected to the chip U6 of the HPLC module through the serial port HPLC_TXD or the serial port HPLC_RXD, and is used to interact the LoRa water meter or LoRa gas meter data obtained by the MCU of the main control module with the HPLC module; the power module is electrically connected to the main control module and the HPLC module respectively, and is used to power the entire data acquisition equipment.

[0044] The utility model has a simple structure and is easy to operate. The downlink data is exchanged with the LoRa water meter or gas meter through the LoRa communication module, and the uplink data is communicated with the concentrator through the low-voltage power line using the HPLC module. The data collection is convenient and the cost is low, which also greatly reduces the difficulty of collecting data.

[0045] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0046] The utility model provides a data acquisition device for LoRa communication, which is applied to the data acquisition process of LoRa water meter or LoRa gas meter, and in some cases can also be applied to the data acquisition of other devices. Figures 1 to 7 In this embodiment, the data acquisition device for LoRa communication includes:

[0047] Main control module, LoRa communication module, HPLC module, RS485 communication module and power module;

[0048] The MCU of the main control module adopts the HC32F460JETA microcontroller of Huada Semiconductor. The 3.3V power supply provides working power to the chip U4 of the MCU of the main control module through the filter capacitor. The MCU of the main control module is connected to the crystal oscillator to form a clock circuit, the MCU serial port DBG_TXD or serial port DBG_RXD of the main control module is led to the J1 pin to form a serial port debugging circuit, and the MCU of the main control module leads the SWD interface MCU_RESET or SWD interface SWDIO or SWD interface SWDCLK to the pin J2 to form a download circuit for program download and debugging; the end of the LoRa communication module circuit labeled ShutDown and RST_M is connected to the GPIO port of the chip U4 of the MCU of the main control module. ShutDown is the MCU of the main control module through controlling the transistor Q1 and the MOS tube U 1 Manage the power supply of the LoRa communication module. RST_M is the MCU of the main control module, which controls the transistor Q2 to pull down the reset pin of the LoRa communication module, so that the LoRa communication module can be reset by the MCU of the main control module in abnormal conditions such as freezing. The chip U4 of the MCU of the main control module is connected to the chip U5 of the LoRa communication module through the serial port MCU_RXD or the serial port MCU-TXD, which is used to upload the data of the LoRa water meter or LoRa gas meter collected by the LoRa module to the chip U4 of the MCU of the main control module for processing. The LoRa communication module adopts a modular design and can be directly plugged in and out, so it can meet the communication occasions of LoRa meters in various frequency bands. It only needs to replace the LoRa modules of different frequency bands, making the product more versatile; the HPLC module adopts the model H2.888.The mature HPLC module of 523 can be directly plugged into the main control module. The interface it leads out is supplied to the HPLC communication module through +12V. The HPLC communication module and the uplink communication are connected to the 220V AC input pin of the power module through the power line (UL / UN). The chip U6 of the HPLC communication module is connected to the chip U4 of the MCU of the main control module through the lead-out serial port HPLC_RXD or serial port HPLC_TXD, which is used to interact the LoRa water meter or LoRa gas meter data obtained by the MCU of the main control module with the HPLC module; the RS485 communication module circuit is connected to the MCU serial port RS485 / 232_TX or serial port RS485 / 232_RX of the main control module through one side of the isolation chip U10, and the other side One side is connected to the conversion chip U11 of the RS485 communication module. The isolation chip U10 and the conversion chip U11 are powered by the isolated V5P0_RS485 output by the power board. The power module is powered by 220V AC power. The switch power conversion circuit in the power module outputs two isolated DC power supplies, one of which is +12V and is responsible for providing input power to the entire data acquisition device. The other output voltage is 5V V5P0_RS485, which is supplied to the RS485 communication module in the data acquisition device. The RS485 communication module with a separate 5V power supply can further reduce the interference of the overall system of the data acquisition device to the RS485 differential signal, enhance the RS485 communication distance and communication quality, and ensure the safety and stability of RS485 communication. .

[0049] In some other embodiments, the MCU of the main control module can be other models that can meet the serial port, GPIO port, SPI interface, ADC interface, and I2C interface requirements of this design. The power supply module can also be powered by 220V AC and output a group of 12V and a group of 5V.

[0050] Furthermore, in this embodiment, combined with Figure 1 , Figure 2 and Figure 8 It also includes a WIFI module. The chip U2 of the WIFI module is connected to the corresponding serial port of the chip U4 of the main control module MCU through the serial port WI-FI_RX or the serial port WI-FI_TX, which is used for the WIFI module to exchange data with the MCU of the main control module. The WIFI module adopts a universal WIFI module, model HF-LPT170, which can be directly plugged and installed on the WIFI modular interface of the data acquisition equipment. It can be remotely upgraded through WIFI in some places that are not suitable for opening the cover to upgrade, thereby enhancing the maintainability and flexibility of the product.

[0051] Furthermore, in this embodiment, combined with Figure 1 , Figure 2 , Fig. 9 and Fig.10 , also includes a memory module, the memory module includes two parts: EPROM memory and FLASH memory, wherein the chip U7 and the real-time clock core U8 in the EPROM memory circuit are connected to the I2C interface (EPROM_SCL / EPROM_SDA / EPROM_WP) of the MCU of the main control module, and are used to store system parameters, configurations and other data that need to be updated frequently, so that the remote master station system can call data at any time, and at the same time, the real-time clock (RTC) chip and the RTC battery can be used to ensure that the real-time clock is not lost after the system power is off; the chip U12 in the FLASH memory is connected to the SPI interface (FLASH_MOSI / FLASH_SCK / FLASH_SSN / FLASH_MISO) of the MCU of the main control module, and is used to store programs, tables and other data that do not need to be updated frequently.

[0052] Furthermore, in this embodiment, combined with Figure 1 , Figure 2 , Fig.11 , Fig.12 and Fig.13 , also includes a main power supply power-off detection module and an RTC battery detection module. The MCU of the main control module is connected to the main power supply power-off detection module through an ADC sampling interface PowerDownDetect, which is used to determine whether the main power supply is powered off, so that the system switches to the farad capacitor for power supply and performs the final data storage and power-off reporting work. It is connected to the RTC battery detection module through another ADC sampling interface VBAT_CHECK. The RTC battery detection module includes an RTC circuit and an RTC battery and detection circuit, wherein the RTC circuit provides a real-time clock through the I2C interface of the RTC chip U8 and the chip U4 of the MCU of the main control module. The RTC chip is powered by a 3.3V power supply during normal operation. When the +12V input is powered off, it automatically switches to the backup battery for power supply of the RTC battery and the detection circuit. The RTC battery and detection circuit are connected to the RTC backup battery, and at the same time, the battery voltage signal is transmitted to the ADC interface (VBAT_CHECK) of the MCU of the main control module for sampling after passing through the voltage divider circuit, so as to facilitate the notification of timely replacement of the RTC battery.

[0053] Furthermore, in this embodiment, combined with Figure 1 , Figure 2 , Fig.14 , Fig.15 , Fig.16 and Fig.17, also includes an indicator light module, the MCU of the main control module is connected to the indicator light module through the GPIO interface LED_NET, the indicator light module includes a power supply and main control status indicator light circuit, a LoRa communication module indicator light circuit, a 485 communication indicator light circuit and an HPLC module indicator light circuit, wherein the power supply and main control status indicator light circuit is connected to the MCU chip U4 of the main control module, for indicating the MCU working state of the main control module; the LoRa communication module indicator light circuit is connected to the MCU chip U4 of the main control module, for indicating the interactive working state of the LoRa communication module and the MCU of the main control module; the 485 communication indicator light circuit is connected to the MCU chip U4 of the main control module, for indicating the interactive working state of RS485 and the MCU of the main control module; the carrier module indicator light circuit is connected to the carrier module, for indicating the working state of the carrier module.

[0054] Furthermore, in this embodiment, combined with Figure 1 , Figure 2 and Fig.18 , and also includes a 12V to 3.6V main power module. The main control module is connected to the power module through the 12V to 3.6V main power module. The +12V output of the power module generates a 3.6V output through a DC-DC conversion circuit. The 3.6V is output as 3.3V after a diode voltage drop to supply the main control module circuit, the WIFI module circuit, the LoRa communication module circuit, the memory module circuit, and the real-time clock circuit. On the other hand, it is responsible for charging the farad capacitor.

[0055] Furthermore, in this embodiment, combined with Figure 1 , Figure 2 and Fig.19 , also includes a farad capacitor charging and discharging module, one side of the farad capacitor charging and discharging module is connected to the 12V to 3.6V main power module, and the other side is connected to the main control module. The other 3.6V passes through the farad capacitor charging and discharging module to charge the farad capacitor E2. Since the farad capacitor has a withstand voltage of 2.7V, in order to ensure its service life, the charging threshold is set to 2.5V. Therefore, when the farad capacitor is output, the voltage of the farad capacitor needs to be boosted to 3.3V through the boost chip U14. When the 14-pin enable pin EN of the boost U4 detects a power-off signal of the 12V main power supply, it automatically switches to the farad capacitor to supply power to the main control module circuit, the WIFI communication module circuit, the LoRa communication module circuit, the memory module circuit, and the real-time clock circuit, so that the data acquisition device can save or upload the data for the last time when the power is off, and report it to the master station system at the same time.

[0056] Furthermore, in this embodiment, combined with Figures 1 to 19, the other GPIO interface LED_NET of the main control module is connected to the indicator light module to indicate the working status of the MCU; RS_DE / RE is connected to the RS485 communication module to select the RS485 chip to send and receive data; ShutDown is connected to the power control circuit of the LoRa communication module to control the power supply of the LoRa communication module through the MCU of the main control module; RST_M is connected to the reset pin of the LoRa communication module to power on the LoRa communication module again by pulling down the reset signal after the LoRa communication module freezes or other abnormal conditions; LED_LoRaRX / L ED_LoRaTX is connected to the indicator light module, which is used to indicate the data receiving and sending status of the LoRa communication module respectively; LED_RS485RX / LED_RS485TX is connected to the indicator light module, which is used to indicate the receiving and sending status of the RS485 communication module respectively; WI-FI_RESET is connected to the reset pin of the WIFI module, which is used to power on the WIFI module by pulling down the reset pin after the WIFI module freezes or other abnormal states; WI-FI_PWR_SW is connected to the power pin of the WIFI module, which is used by the MCU of the main control module to control the power on and off of the WIFI module.

[0057] Compared with the prior art, the data acquisition equipment for LoRa communication described in the above embodiments mostly uses 4G communication to communicate, and multiple data acquisition devices are connected at the same time, which has a high acquisition cost. It is also difficult to collect data in application scenarios without network coverage and poor network signals. The utility model exchanges data with the LoRa water meter or LoRa gas meter through the LoRa communication module in the downlink. LoRa adopts a modular design, supports plugging and replacement, and has versatility. It can be used with LoRa meters with different working frequency bands. It only needs to replace the LoRa modules corresponding to different frequency bands, and the other parts of the circuit can be used universally. The data acquisition equipment of the utility model interacts with the concentrator in the uplink through the low-voltage power line. The concentrator communicates with the main station system remotely through 4G. One concentrator can correspond to multiple data acquisition devices, reducing the data flow billing of the existing data acquisition equipment through independent 4G remote communication, and the cost is relatively low. The utility model adopts an HPLC module to communicate with the concentrator via a low-voltage power line on the uplink, which increases the communication distance compared to existing data acquisition devices using RS485 communication, USB communication and the like, so that the product can be used in remote places with poor network signals or no network coverage, reducing the difficulty of collecting data. At the same time, the data acquisition device of the utility model is also provided with an RS485 communication module, which can be compatible with existing data acquisition communication methods and has high compatibility. The data acquisition device of the utility model is also provided with a WIFI module, which can be remotely upgraded via WIFI in some places that are not suitable for opening the cover for upgrading, thereby enhancing the maintainability and flexibility of the product.

[0058] Obviously, the embodiments described above are only preferred embodiments of the utility model, rather than all embodiments. The preferred embodiments of the utility model are given in the accompanying drawings, but they do not limit the patent scope of the utility model. The utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. Although the utility model is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the utility model specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the utility model.

Claims

1. A data acquisition device for LoRa communication, characterized in that: include: Main control module, LoRa communication module, HPLC module and power module; The MCU of the main control module is connected to the chip U5 of the LoRa communication module through the serial port MCU_RXD or the serial port MCU-TXD, and is used to upload the data of the LoRa water meter or LoRa gas meter collected by the LoRa module to the MCU of the main control module for processing; the MCU of the main control module is connected to the chip U6 of the HPLC module through the serial port HPLC_TXD or the serial port HPLC_RXD, and is used to interact the LoRa water meter or LoRa gas meter data acquired by the MCU of the main control module with the HPLC module; the power supply module is electrically connected to the main control module and the HPLC module respectively, and is used to power the entire data acquisition device.

2. A data acquisition device for LoRa communication according to claim 1, characterized in that, It also includes an RS485 conversion module. The MCU of the main control module is connected to the RS485 conversion module through the serial port RS485_TX or the serial port RS485_RX, so that the data acquisition device can directly exchange data with the PC through the RS485 port. The RS485 conversion module is also electrically connected to the power module.

3. A data acquisition device for LoRa communication according to claim 2, characterized in that, It also includes a WIFI module. The MCU of the main control module is connected to the chip U2 of the WIFI module through the serial port WI-FI_TX or the serial port WI-FI_RX, so as to perform function upgrades through remote WIFI.

4. A data acquisition device for LoRa communication according to claim 1, characterized in that, It also includes a memory module, which includes a FLASH memory and an EPROM memory. The MCU of the main control module is connected to the chip U12 of the FLASH memory through an SPI interface, and the MCU of the main control module is connected to the chips U7 and U8 of the EPROM memory respectively through an I2C interface.

5. A data acquisition device for LoRa communication according to claim 1, characterized in that: It also includes a main power supply power-off detection module and an RTC battery detection module. The MCU of the main control module is connected to the main power supply power-off detection module through one ADC sampling interface PowerDownDetect, and is connected to the RTC battery detection module through another ADC sampling interface VBAT_CHECK.

6. A data acquisition device for LoRa communication according to claim 3, characterized in that: It also includes an indicator light module, and the MCU of the main control module is connected to the indicator light module through the GPIO interface LED_NET.

7. A data acquisition device for LoRa communication according to claim 6, characterized in that: The indicator light module includes a power supply and main control status indicator light circuit, a LoRa communication module indicator light circuit, a 485 communication indicator light circuit and an HPLC module indicator light circuit. The power supply and main control status indicator light circuit, the LoRa communication module indicator light circuit and the 485 communication indicator light circuit are respectively connected to the chip U4 of the MCU of the main control module, and the HPLC module indicator light circuit is connected to the HPLC module.

8. A data acquisition device for LoRa communication according to claim 1, characterized in that: It also includes a 12V to 3.6V main power module, and the main control module is connected to the power module through the 12V to 3.6V main power module.

9. A data acquisition device for LoRa communication according to claim 8, characterized in that: It also includes a farad capacitor charging and discharging module, one side of the farad capacitor charging and discharging module is connected to the 12V to 3.6V main power supply module, and the other side is connected to the main control module.

10. A data acquisition device for LoRa communication according to claim 7, characterized in that: The GPIO interface RS_DE or GPIO interface RS_RE of the MCU of the main control module is connected to the RS485 conversion module, the GPIO interface ShutDown and the GPIO interface RST_M are connected to the LoRa communication module, the GPIO interface LED_LoRaRX or the GPIO interface LED_LoRaTX, the GPIO interface LED_RS485RX or LED_RS485TX are connected to the indicator light module shown, and the GPIO interfaces WI-FI_RESET and WI-FI_PWR_SW are connected to the WIFI module.

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