Wireless Internet of Things communication circuit board and system for acquiring data of liquid level instrument

Abstract

The utility model discloses a wireless internet of things communication circuit board and system for acquiring data of a liquid level meter, and the circuit board comprises a main control module, a wireless module, an interface communication module, a storage module, and a power supply module, and the interface communication module comprises a plurality of interface modules, an interface conversion module, and an interface power supply module. By arranging a plurality of interface modules and interface conversion modules, the wireless internet-of-things communication circuit board can support connection of various types of liquid level instruments, the compatibility of equipment is further enhanced due to the existence of the interface conversion modules, the wireless internet-of-things communication circuit board can automatically identify and convert communication protocols of different types of liquid level instruments, accurate transmission of data is ensured, and the wireless internet-of-things communication circuit board is suitable for popularization and application. The problem of communication failure caused by interface incompatibility is reduced; data of the liquid level instrument can be uploaded to a remote monitoring center in real time through a wireless network through integration of a wireless module, remote acquisition and management of the data are achieved, the cost and risk of manual inspection are reduced, a user can master the working state and data change of the liquid level instrument anytime and anywhere through the remote monitoring function, and the user experience is improved. And powerful support is provided for process monitoring, inventory management and safety early warning.

Description

Technical Field

[0001] The utility model relates to the technical field of Internet of Things communications, and more specifically, to a wireless Internet of Things communications circuit board and system for acquiring liquid level meter data. Background Art

[0002] Traditional liquid level meters play a vital role in industrial automation and process control. By accurately measuring the height of liquids in containers like storage tanks and reactors, these devices provide critical data support for process monitoring, inventory management, and safety warnings. However, with the rapid development of technologies such as Industry 4.0 and the Internet of Things (IoT), the demand for remote monitoring and real-time data transmission is becoming increasingly urgent, and the limitations of traditional liquid level meters are becoming increasingly apparent.

[0003] Traditional level meters rely on data cables for data transmission. This not only limits the scope of data acquisition, increases wiring costs and complexity, but can also lead to maintenance difficulties, especially in harsh or remote working environments. Furthermore, cable aging and breakage are common, impacting the stability and reliability of data transmission.

[0004] Given the wide variety of liquid level meters on the market, each potentially featuring unique electrical interfaces and communication protocols, developing a separate wireless communication module for each model would undoubtedly significantly increase R&D costs and production cycles, hindering the rapid adoption and application of the technology. The lack of a standardized wireless communication interface makes it difficult to seamlessly integrate liquid level meters of different brands and models, limiting interoperability and overall performance improvements within industrial automation systems. Traditional liquid level meters are often limited by their hardware design when it comes to upgrades and expansions, making it difficult to quickly adapt to market changes and technological advancements, such as adding advanced features like remote monitoring and fault diagnosis.

[0005] The wireless transformation of liquid level meters is not only an inevitable trend in technological advancement but also a key measure to meet the needs of industrial automation and intelligent development. By developing versatile and cost-effective transformation solutions, we can effectively address the shortcomings of traditional liquid level meters in data transmission, compatibility, and flexibility, and promote the in-depth development of digital transformation in the industrial sector. Utility Model Content

[0006] The purpose of the present invention is to solve the deficiencies of the above-mentioned technology and provide a wireless Internet of Things communication circuit board and system with high flexibility, strong compatibility and wireless communication capability for obtaining liquid level meter data.

[0007] The utility model provides a wireless Internet of Things communication circuit board for obtaining liquid level meter data, including the following modules arranged on a substrate:

[0008] The main control module is used to obtain and process the liquid level meter data and upload it via the wireless network;

[0009] Wireless module, connected to the main control module, used to upload liquid level meter data;

[0010] The interface communication module is connected to the main control module and is used to connect to the liquid level meter and obtain liquid level meter data;

[0011] The storage module is connected to the main control module and is used to store the running control program and data;

[0012] The power module is connected to the main control module and is used to supply power to the above modules;

[0013] Characterized in that, the interface communication module includes:

[0014] Multiple interface modules for connecting with different types of liquid level meters;

[0015] Interface conversion module, used to identify different types of liquid level meters and realize conversion between multiple interface modules;

[0016] Interface power module, used to provide power to the interface conversion module;

[0017] The substrate is provided with contact disks corresponding to the main control module and the wireless module, and other modules are connected to the main control module via the contact disks.

[0018] The wireless Internet of Things communication circuit board for acquiring the liquid level meter is powered on through the power module, providing stable power to the main control module, wireless module, interface communication module and storage module on the circuit board. The main control module performs initialization operations, loads and runs the control program stored in the storage module, and is ready to receive and process data. The liquid level meter is connected to the circuit board through an interface module among the multiple interface modules. The interface conversion module automatically identifies the type of liquid level meter, determines its model and communication protocol, and performs corresponding configuration to ensure that data communication between the interface and the liquid level meter can proceed smoothly. After the interface communication module establishes a stable communication connection with the liquid level meter, the main control module begins to receive and process real-time data from the liquid level meter, and stores the processed data in the storage module for subsequent query or analysis.

[0019] There are many types of liquid level meters on the market. Each device may have a unique electrical interface and communication protocol. Setting up an interface for each device separately will make the circuit board bulky and difficult to upgrade and update, and have poor versatility. In order to make the wireless Internet of Things communication circuit board that obtains liquid level meter data compatible with liquid level meters with different electrical interfaces and communication protocols, multiple interface modules are set to provide a variety of interface options. The interface conversion module automatically identifies the type of liquid level meter currently connected, quickly adjusts the corresponding interface parameters, and ensures that data communication between liquid level meters is stable and smooth. The setting of the multiple interface modules and the interface conversion module significantly enhances the compatibility and flexibility of the circuit board, greatly improving the efficiency and accuracy of liquid level meter data transmission.

[0020] The wireless Internet of Things communication circuit board for obtaining liquid level meter data also includes a programming interface module and a programming control module, which are connected to the main control module. The programming interface is used to download the control program of the main control module and the wireless module, and the programming control module is used to control whether the main control module and the wireless module can download the control program.

[0021] By setting up the programming interface module, technicians and users can download and update the control programs of the main control module and wireless module through this interface. When they need to fix program vulnerabilities, add new functions, or optimize performance, they only need to download through the programming interface module, without having to adjust the entire circuit board or its hardware. This simplifies the program update process, improves the maintenance efficiency of the control program, and enhances scalability. The addition of the programming control module also provides additional security for the control program download process.

[0022] In order to meet the voltage requirements of internal circuit components and achieve energy consumption management, the main control module has different voltage requirements. The forward low-dropout voltage regulator can convert the input voltage into a stable DC voltage suitable for the operation of the main control module and other circuit modules. Therefore, the power supply module includes a forward low-dropout voltage regulator and peripheral circuits to provide different voltages to the main control module, thereby ensuring the normal operation of the circuit board.

[0023] To simplify circuit board design, reduce the number of components and wiring complexity on the circuit board, and reduce the need for interface conversion and signal matching, the main control module, storage module, and wireless module are integrated into a single chip. This facilitates miniaturization of the device, improves system integration, accelerates data transmission between modules, and enhances overall system performance. The chip also includes a protocol parsing software module, which is used to align the data exchange protocol between the wireless module and the main control module. By configuring this protocol parsing software module, the system can support multiple wireless communication standards and protocols, further improving device compatibility and ensuring correct data transmission between different modules.

[0024] The main control module may encounter anomalies or errors during operation. In order to prevent data loss or equipment malfunction caused by errors, it is necessary to regularly check the operating status of the main control module, promptly detect and respond to anomalies, and promptly reset the main control module to prevent the error state from persisting and causing the system to crash. Therefore, the wireless Internet of Things communication circuit board that obtains liquid level meter data also includes a watchdog module, and the power module also includes a reset module. The watchdog module and the reset module are connected to the main control module to monitor the operation of the main control module and reset the main control module in the event of an error. This can monitor and quickly respond to abnormal conditions of the main control module in real time, improve the reliability, stability and security of the system, and prevent data leakage and security incidents.

[0025] In order to further improve the real-time performance of the wireless Internet of Things communication circuit board, a sound alarm module is also provided on the wireless Internet of Things communication circuit board, which is connected to the main control module and is used to prompt the working status of the wireless Internet of Things communication circuit board through different sounds. The voice prompt of the sound alarm module can provide real-time feedback on the working status of the circuit board. There is no need to stare at the display screen or check the indicator light continuously, and the working status of the circuit board can be quickly understood. When a fault occurs, the module can provide preliminary fault information, providing clues and basis for subsequent fault diagnosis and repair work, and the sound alarm module can also be used in combination with remote monitoring to realize remote real-time alarm function, helping remote monitoring personnel to detect problems in time and take measures.

[0026] In order to simplify the structure of the wireless Internet of Things communication circuit board and realize the standardization of the interface, the wireless Internet of Things communication circuit board for obtaining liquid level meter data is provided with two interface modules. The interface conversion module is integrated with one interface module into a first interface terminal, and the interface power supply module is integrated with another interface module into a second interface terminal. The first interface terminal is connected to the main control module through the second interface terminal. Through the setting of the first interface terminal and the second interface terminal, the connection interface between the wireless Internet of Things communication circuit board and the liquid level meter is standardized, which is more compatible with different liquid level meter models.

[0027] The power module provides power to the interface power module, realizing effective management and optimization of the circuit board power supply. Through reasonable power distribution and power supply strategies, it ensures that the wireless Internet of Things communication circuit board can obtain stable and reliable power supply under various working conditions.

[0028] The wireless module includes a wireless chip and an antenna terminal. The wireless chip is arranged at the edge of the substrate, and an installation position for accommodating the antenna terminal is opened at the corresponding edge of the substrate. The wireless chip is responsible for data modulation and demodulation, and the antenna terminal ensures that the signal is accurately and quickly transmitted to the antenna for long-distance transmission. Through the cooperation of the wireless chip and the antenna terminal, efficient and stable data transmission is achieved.

[0029] The present utility model also provides a wireless Internet of Things communication system for a liquid level meter, comprising a plurality of distributed liquid level meters, wireless hotspots and a background management system, and also comprising the above-mentioned wireless Internet of Things communication circuit board for acquiring liquid level meter data. Each wireless Internet of Things communication circuit board for acquiring liquid level meter data corresponds to a liquid level meter, and the liquid level meter is connected to the interface communication module via a cable. All wireless Internet of Things communication circuit boards for acquiring liquid level meter data are wirelessly connected to the wireless hotspot via a wireless module, and the acquired liquid level meter data is uploaded to the background management system via a wireless network.

[0030] The background management system includes a data display module for displaying the distribution of liquid level meters, data upload status, data statistics and analysis status.

[0031] The beneficial effect of this utility model is that, by providing multiple interface modules, the wireless IoT communication circuit board can support connections to a variety of liquid level meters, greatly improving the versatility of the device. This design allows the same circuit board to be compatible with most liquid level meters on the market, eliminating the need to develop separate wireless devices for each type of liquid level meter, significantly reducing the cost and complexity of the modification. The presence of the interface conversion module further enhances the compatibility of the device. It can automatically identify and convert the communication protocols of different types of liquid level meters, ensuring accurate data transmission and reducing communication failures caused by interface incompatibility.

[0032] The circuit board utilizes a modular design, with each functional module (such as the main control module, wireless module, and interface communication module) relatively independent and connected via a contact plate. This design facilitates module replacement, upgrade, or repair when needed, improving the maintainability and scalability of the equipment. When the level meter model is updated or the communication protocol changes, only the corresponding interface module needs to be replaced or upgraded, without replacing the entire circuit board, reducing subsequent modification costs.

[0033] The integration of wireless modules enables real-time upload of level meter data to a remote monitoring center via wireless networks, enabling remote data acquisition and management. This not only improves work efficiency but also reduces the costs and risks of manual inspections. Remote monitoring allows users to monitor the level meter's operating status and data changes anytime, anywhere, providing strong support for process monitoring, inventory management, and safety warnings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the present invention. To better illustrate the present invention, some components in the accompanying drawings may be omitted, enlarged, or reduced in size, and do not represent the dimensions of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the accompanying drawings.

[0035] Figure 1 This is a module schematic diagram of the wireless Internet of Things communication circuit board for obtaining liquid level meter data.

[0036] Figure 2 This is a circuit diagram of the WIFI main control module.

[0037] Figure 3 This is a circuit diagram of the RS485 communication module.

[0038] Figure 4 1 is a circuit diagram of the watchdog module.

[0039] Figure 5 2 is a schematic diagram of a control signal circuit of the reset module.

[0040] Figure 6 Schematic diagram of the reset control circuit of the reset module.

[0041] Figure 7 Schematic diagram of the LED user indicator module.

[0042] Figure 8 This is a hardware diagram of the wireless IoT communication circuit board.

[0043] The symbols in the drawings of the specification include: WIFI main control module 1, RS485 communication module 2, watchdog module 3, reset module 4, LED user indicator module 5, and power supply 6. DETAILED DESCRIPTION

[0044] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings:

[0045] Example: Refer to Figure 1

[0046] The utility model provides a wireless Internet of Things communication circuit board for obtaining liquid level meter data, including the following modules arranged on a substrate:

[0047] The main control module is used to obtain and process the liquid level meter data and upload it via the wireless network;

[0048] Wireless module, connected to the main control module, used to upload liquid level meter data;

[0049] The interface communication module is connected to the main control module and is used to connect to the liquid level meter and obtain liquid level meter data;

[0050] The storage module is connected to the main control module and is used to store the running control program and data;

[0051] The power module is connected to the main control module and is used to supply power to the above modules;

[0052] Characterized in that, the interface communication module includes:

[0053] Multiple interface modules for connecting with different types of liquid level meters;

[0054] Interface conversion module, used to identify different types of liquid level meters and realize conversion between multiple interface modules;

[0055] Interface power module, used to provide power to the interface conversion module;

[0056] The substrate is provided with contact disks corresponding to the main control module and the wireless module, and other modules are connected to the main control module via the contact disks.

[0057] The main control module, storage module and wireless module are integrated in the same chip. The chip also includes a protocol analysis soft module, which is used to align the data exchange protocol between the wireless module and the main control module.

[0058] The wireless Internet of Things communication circuit board for obtaining liquid level meter data also includes a watchdog module, and the power supply module also includes a reset module. The watchdog module and the reset module are connected to the main control module for monitoring the operation of the main control module and resetting the main control module in the event of an error.

[0059] The wireless Internet of Things communication circuit board for obtaining liquid level meter data also includes a sound alarm module, which is connected to the main control module and is used to prompt the working status of the wireless Internet of Things communication circuit board through different sounds.

[0060] The wireless Internet of Things communication circuit board for acquiring liquid level meter data includes two interface modules, the interface conversion module is integrated with one interface module into a first interface terminal, the interface power module is integrated with another interface module into a second interface terminal, the first interface terminal is connected to the main control module through the second interface terminal, and the power module provides power for the interface power module.

[0061] like Figure 1 As shown, the ESP32 controller (i.e., main control module), storage module, and WIFI module (i.e., wireless module) are integrated into the same chip. The wireless Internet of Things communication circuit board for obtaining the liquid level meter is powered on by the power module, providing stable power for the ESP controller, WIFI module, RS485 communication module (i.e., interface communication module), and storage module on the circuit board. The host computer program is configured, and the ESP controller starts initialization operation, loads and runs the control program stored in the storage module, and is ready to receive and process data. When the liquid level meter device is connected, if the liquid level meter device adopts the RS485 communication protocol, it can be directly transmitted to the UART2 interface through the RS485 communication module. When the liquid level meter adopts the RS232 communication protocol, the RS232 to RS485 communication module (i.e., interface conversion module) automatically identifies the type of liquid level meter, determines that the communication protocol of the liquid level meter is RS232, then converts it to the RS485 communication protocol through the module, and performs corresponding configuration, and then transmits it to the interface UART2 to ensure that the data communication between the interface and the liquid level meter can proceed smoothly. After the UART2 establishes a stable communication connection with the liquid level meter, the ESP32 controller starts to receive real-time data from the liquid level meter and temporarily stores it in the storage module, and uploads the data to the remote server / cloud through the WIFI module for data processing. The processed data is stored in the storage module for subsequent query or analysis.

[0062] During the operation of the ESP32 controller, the watchdog module and the LED user indicator (i.e., the sound alarm module) are in operation. The main control module may experience anomalies or errors during operation. To prevent data loss or device malfunction caused by errors, the watchdog module regularly checks the main control module's operating status, promptly detects and responds to anomalies, and resets the main control module through the reset module in the power module to prevent persistent error states from causing system crashes. This improves system reliability, stability, and security, and prevents data leaks and security incidents.

[0063] The LED user indicator light is connected to the main control module and can prompt the working status of the wireless Internet of Things communication circuit board through different sounds and indicator lights. It can provide real-time feedback on the working status of the circuit board. When a fault occurs, the module can provide preliminary fault information, providing clues and basis for subsequent fault diagnosis and repair work. In addition, the sound alarm module can also be used in combination with remote monitoring to realize remote real-time alarm function, helping remote monitoring personnel to detect problems in time and take measures.

[0064] The present utility model also provides a wireless Internet of Things communication system for a liquid level meter, comprising a plurality of distributed liquid level meters, wireless hotspots and a background management system, characterized in that the wireless Internet of Things communication circuit board for acquiring liquid level meter data, each wireless Internet of Things communication circuit board for acquiring liquid level meter data corresponds to a liquid level meter, the liquid level meter is connected to the interface communication module via a cable, all wireless Internet of Things communication circuit boards for acquiring liquid level meter data are wirelessly connected to the wireless hotspot via a wireless module, and the acquired liquid level meter data is uploaded to the background management system via a wireless network.

[0065] The background management system includes a data display module for displaying the distribution of liquid level meters, data upload status, data statistics and analysis status.

[0066] Example 2: Reference Figures 2 to 8

[0067] Figure 2 This is the circuit diagram of the wireless Internet of Things communication circuit board, which mainly includes a WIFI main control module 1, an RS485 communication module 2, a watchdog module 3, a reset module 4, an LED user indicator module 5 and a power supply 6.

[0068] Among them, such as Figure 2 As shown, pins 27 and 28 of the WIFI main control module 1 are connected to ESP32_RXD and ESP32_TXD respectively, realizing serial communication between the two devices and allowing data to be transmitted bidirectionally between the WIFI main control module 1 and ESP32. Pin EN is connected to ESP_3.3V to power the WIFI main control module 1.

[0069] like Figure 3 As shown, the RS485 communication module 2 is connected to ESP32_RXD and ESP32_TXD, and the RS485 communication module 2 is connected to the WIFI main control module 1 through ESP32_RXD and ESP32_TXD, realizing serial communication between ESP32 and RS485 bus, providing possibility for high reliability and long-distance data transmission.

[0070] like Figure 4As shown, pin PA4 of the watchdog module 3 is used to output a reset signal nRESET, and pin 13 is connected to CHECK IO. The watchdog module 3 is connected to the WIFI main control module 1 through CHECK IO, and is used to regularly detect the working status of the WIFI main control module 1. When an abnormality is detected in the WIFI main control module 1, the watchdog module 3 outputs an nRESET reset signal and transmits it to the reset module 4 and the LED user indicator module 5, so as to promptly display the abnormality and take measures to reset the WIFI main control module 1 to prevent the abnormality from spreading, resulting in data loss and system crash.

[0071] The reset module 4 includes a control signal and a reset control. The control signal is as follows: Figure 5 As shown, pin 1 receives the nRESET reset signal, the reset module 4 is connected to the watchdog module 3 through nRESET, and is connected to the WIFI main control module 1 through GPIO0. The current state of the WIFI main control module 1 can be obtained through GPIO0. When the nRESET reset signal is received from the watchdog module 3, the reset signal is transmitted to the control signal. The reset control is as shown in FIG. Figure 6 As shown, the reset operation is performed by controlling the power supply of ESP. When nIN is low, it is valid to reset the WIFI main control module.

[0072] like Figure 7 As shown, the LED user indicator light module 5 controls two signal lights, wherein pin 2 receives the nRESET reset signal and lights up. The LED user indicator light module 5 is connected to the reset module 4 through nRESET and is connected to the WIFI main control module through GPIO12. Pin 4 receives the GPIO12 signal from the WIFI main control module. When the data upload is completed, the indicator light turns on, and timely feedback is given to the user on the current working status of the infinite Internet of Things communication circuit board.

[0073] Figure 8 The hardware diagram of the wireless Internet of Things communication circuit board is provided on the substrate with a contact plate corresponding to the WIFI main control module 1, the RS485 communication module 2, the watchdog module 3, the reset module 4, the LED user indicator module 5, the power supply 6 according to Figures 2 to 7 The circuit diagram of the wireless Internet of Things communication circuit board is the same as the above description, and is connected to the WIFI main control module 1 through the contact plate on the circuit board.

Claims

1. A wireless Internet of Things communication circuit board for acquiring liquid level meter data, comprising the following modules arranged on a substrate: The main control module is used to obtain and process the liquid level meter data and upload it via the wireless network; Wireless module, connected to the main control module, used to upload liquid level meter data; The interface communication module is connected to the main control module and is used to connect to the liquid level meter and obtain liquid level meter data; The storage module is connected to the main control module and is used to store the running control program and data; The power module is connected to the main control module and is used to supply power to the above modules; Characterized in that, the interface communication module includes: Multiple interface modules for connecting with different types of liquid level meters; Interface conversion module, used to identify different types of liquid level meters and realize conversion between multiple interface modules; Interface power module, used to provide power to the interface conversion module; The substrate is provided with contact disks corresponding to the main control module and the wireless module, and other modules are connected to the main control module via the contact disks.

2. The wireless Internet of Things communication circuit board for acquiring liquid level meter data according to claim 1, characterized in that: It also includes a programming interface module and a programming control module, which are connected to the main control module. The programming interface is used to download control programs for the main control module and the wireless module, and the programming control module is used to control whether the main control module and the wireless module can download control programs.

3. The wireless Internet of Things communication circuit board for acquiring liquid level meter data according to claim 1, characterized in that: The power supply module includes a forward low-dropout voltage regulator and peripheral circuits, and is used to provide different voltages to the main control module.

4. The wireless Internet of Things communication circuit board for acquiring liquid level meter data according to claim 1, characterized in that: The main control module, storage module and wireless module are integrated in the same chip. The chip also includes a protocol analysis soft module, which is used to align the data exchange protocol between the wireless module and the main control module.

5. The wireless Internet of Things communication circuit board for acquiring liquid level meter data according to any one of claims 1 to 4, characterized in that: It also includes a watchdog module, and the power supply module also includes a reset module. The watchdog module and the reset module are connected to the main control module and are used to monitor the operation of the main control module and reset the main control module in the event of an error.

6. The wireless Internet of Things communication circuit board for acquiring liquid level meter data according to any one of claims 1 to 4, characterized in that: It also includes a sound alarm module, which is connected to the main control module and is used to prompt the working status of the wireless Internet of Things communication circuit board through different sounds.

7. The wireless Internet of Things communication circuit board for acquiring liquid level meter data according to any one of claims 1 to 4, characterized in that: It includes two interface modules, the interface conversion module is integrated with one interface module to form a first interface terminal, the interface power module is integrated with the other interface module to form a second interface terminal, the first interface terminal is connected to the main control module through the second interface terminal, and the power module provides power for the interface power module.

8. The wireless Internet of Things communication circuit board for acquiring liquid level meter data according to any one of claims 1 to 4, characterized in that: The wireless module includes a wireless chip and an antenna terminal. The wireless chip is arranged at an edge of a substrate, and a mounting position for accommodating the antenna terminal is provided at a corresponding edge of the substrate.

9. A wireless Internet of Things communication system for liquid level meters, comprising multiple distributed liquid level meters, wireless hotspots, and a background management system, characterized in that: It also includes a wireless Internet of Things communication circuit board for obtaining liquid level meter data as described in any one of claims 1 to 8, each wireless Internet of Things communication circuit board for obtaining liquid level meter data corresponds to a liquid level meter, the liquid level meter is connected to the interface communication module through a cable, and all wireless Internet of Things communication circuit boards for obtaining liquid level meter data are wirelessly connected to the wireless hotspot through a wireless module, and the obtained liquid level meter data is uploaded to the background management system through the wireless network.

10. The wireless Internet of Things communication system for a liquid level meter according to claim 9, characterized in that: The background management system includes a data display module for displaying the distribution of liquid level meters, data upload status, data statistics and analysis status.

Images