Intelligent well lid state acquisition system based on LoRa communication

Abstract

The utility model relates to an intelligent well lid state acquisition system based on LoRa communication, which comprises a LoRa monitoring terminal installed on a well lid and a LoRa gateway communicated with the terminal, the monitoring terminal is integrated with a three-axis gyroscope, a water sensor and a water level sensor, well lid inclination displacement, water level and vibration data are acquired through a main control unit, and the well lid inclination displacement, water level and vibration data are transmitted to the LoRa monitoring terminal. The LoRa communication unit sends the information to the gateway; and after receiving the multi-terminal data through the LoRa network, the gateway switches to 4G communication and uploads the multi-terminal data to the cloud platform. A power supply unit in the terminal independently supplies power to each module, and a main control unit controls a sensor and a communication module to work in a time-sharing manner; the gateway power supply module supplies power to the LoRa module, the 4G module and the main control chip. According to the utility model, the multi-dimensional monitoring of the manhole cover state is realized through the cooperative detection of multiple sensors, the terminal power consumption is reduced and the coverage area is expanded by using LoRa communication, the data uploading reliability is guaranteed by combining 4G communication, and the system is suitable for the intelligent management of urban manhole covers.

Description

A smart manhole cover status acquisition system based on LoRa communication Technical Field

[0001] This utility model relates to the field of smart city terminal equipment and Internet of Things communication technology, specifically to a smart manhole cover status acquisition system based on LoRa communication. Background Technology

[0002] With the acceleration of urbanization, the number and distribution of manhole covers are gradually increasing. Traditional manual inspection methods are costly and time-consuming, and it is difficult to monitor the status of manhole covers in real time. Once a manhole cover is lost or displaced, it can easily lead to safety accidents. Intelligent manhole cover systems can monitor the opening and closing status, tilt angle, and other information of manhole covers. This enables remote intelligent management of manhole covers, effectively improving the efficiency of urban infrastructure management and reducing the probability of safety accidents. However, existing manhole cover displacement monitoring devices have the following problems:

[0003] (1) The monitoring status is relatively simple. Existing manhole cover monitors generally mainly monitor the tilt angle, which cannot comprehensively judge the complex risks such as water immersion and water accumulation.

[0004] (2) Poor communication methods. The monitoring terminals of existing smart manhole cover systems generally use 2G communication or short-range communication such as Bluetooth. Even if 4G communication is used, it is limited by the configuration and installation restrictions of manhole cover detection products, which makes data transmission easy to be interrupted.

[0005] (3) High power consumption. The sensors and communication modules in the monitoring terminal operate at full power continuously, resulting in extremely high power consumption and requiring frequent battery replacements. Summary of the Invention

[0006] The technical problem this invention aims to solve is to overcome the shortcomings of existing manhole cover monitors, such as limited monitoring items, unsatisfactory communication methods, and high power consumption. It provides an intelligent manhole cover status acquisition system based on LoRa communication, which integrates tilt displacement, water immersion, and water level data acquisition and processing to achieve multi-dimensional composite monitoring of manhole cover status. Simultaneously, it utilizes the low-power, interference-resistant LoRa network for centralized data relay processing before switching to 4G communication for uploading, ensuring signal quality and stability. Furthermore, the monitoring terminal employs independent module power supply and unit-based operating modes, combined with low-power LoRa communication transmission, reducing the power consumption of the manhole cover terminal equipment.

[0007] This smart manhole cover status acquisition system based on LoRa communication includes LoRa monitoring terminals installed one-to-one on each manhole cover, and a LoRa gateway that communicates with several data collectors via a LoRa network and uploads the collector signals to a cloud platform. Each LoRa monitoring terminal includes a signal acquisition unit for acquiring status signals from the manhole covers, a main control unit for processing the data, a LoRa communication unit for uploading the processed data, and a power supply unit. The signal acquisition unit and the LoRa communication unit are connected to the input and output terminals of the main control unit, respectively. The power supply unit provides power to the signal acquisition unit, the main control unit, and the LoRa communication unit. The LoRa gateway includes a main control chip, a LoRa module, a 4G module, and a power supply module. The LoRa module and the 4G module are connected to the input and output terminals of the main control chip, respectively. The power supply module provides power to the LoRa gateway, including the main control chip, the LoRa module, and the 4G module.

[0008] Specifically, the signal acquisition unit includes a LIS3DHTR three-axis gyroscope, a water immersion sensor, and a water level sensor; the main control unit uses an FM33LC025 processing chip; the SPI interface SCK / MOSI / MISO / NSS of the LIS3DHTR three-axis gyroscope is connected to the SPI2 bus pin group PC8 / PC10 / PC9 / PB7 of the main control unit; the interrupt pins INT1 / INT2 of the LIS3DHTR three-axis gyroscope are connected to the external interrupt input pins PB2 / PD11 of the main control chip's SPI2; the water immersion sensor is connected to the SPI2 bus pin group PC5 / PC6 of the main control unit; and the water level sensor is connected to the SPI2 bus pin PC13 of the main control unit.

[0009] Furthermore, the LoRa communication unit adopts an E32-433T30S module, with its UART_TX / RX pins connected to the PA3 / PA2 pins of the main control unit, its MD0 / MD1 pins connected to the PA5 / PA6 pins of the main control unit, and its AUX pin connected to the PB11 pin of the main control unit.

[0010] Furthermore, the power supply unit includes a 3.6V lithium battery pack, which outputs a 3.3V voltage through a TPS63020 step-down chip and is connected to the VCC terminal of the signal acquisition unit, the VDD terminal of the main control unit, and the VBAT terminal of the LoRa communication unit, respectively, and provides a DC3.3-5V operating voltage to each functional unit.

[0011] Specifically, the main control chip uses the GD32F103VET6 processing chip; the LoRa module uses the E32-433T30S module, with its UART_TX / RX pins connected to the PA2 / PA3 pins of the main control chip, and its MD0 / MD1 pins connected to the PA0 / PA1 pins. The RF interface is connected to the antenna via a 50Ω impedance matching circuit; the 4G module uses the EC800E-CN module, with its UART_TX / RX pins connected to the PB11 / PB10 pins of the main control chip, and its PWRKEY pin connected to the PE13 / PE14 pins. The VBAT power supply terminal is powered off by a MOSFET controlled by the PCO pin.

[0012] Furthermore, the input terminal of the power module outputs a DC 5V voltage after passing through a common-mode choke circuit, a step-down chip TPS54560, and a filter circuit.

[0013] This utility model discloses an intelligent manhole cover status acquisition system based on LoRa communication, which overcomes the shortcomings of existing manhole cover monitors, such as limited monitoring items, unsatisfactory communication methods, and high power consumption. By integrating tilt displacement, water immersion, and water level data acquisition and processing, it achieves multi-dimensional composite monitoring of manhole cover status. At the same time, it utilizes the low-power, interference-resistant LoRa network for centralized data relay processing before switching to 4G communication for uploading, ensuring signal quality and stability. By adopting independent power supply for modules and independent operation of units in different working conditions in the monitoring terminal, combined with low-power LoRa communication transmission, the power consumption of the manhole cover terminal equipment is reduced. Attached Figure Description

[0014] The following description, in conjunction with the accompanying drawings, further illustrates the intelligent manhole cover status acquisition system based on LoRa communication according to this utility model:

[0015] Figure 1 is a wireframe diagram of the logical architecture and connection principle of the intelligent manhole cover status acquisition system based on LoRa communication;

[0016] Figure 2 is a circuit diagram of the main control unit in the LoRa monitoring terminal;

[0017] Figure 3 is a circuit diagram of the LIS3DHTR three-axis gyroscope in the signal acquisition unit;

[0018] Figure 4 is a circuit diagram of the water immersion sensor in the signal acquisition unit;

[0019] Figure 5 is a circuit diagram of the water level sensor in the signal acquisition unit;

[0020] Figure 6 is a circuit diagram of the LoRa communication unit and LoRa module of this smart manhole cover status acquisition system based on LoRa communication;

[0021] Figure 7 is a circuit diagram of the main control chip in the LoRa gateway;

[0022] Figure 8 is a circuit diagram of the 4G module in the LoRa gateway;

[0023] Figure 9 is a circuit diagram of the power module in the LoRa gateway.

[0024] In the picture:

[0025] 1-LoRa monitoring terminal; 11-signal acquisition unit; 12-main control unit; 13-LoRa communication unit; 14-power supply unit;

[0026] 2-LoRa gateway; 21-Main control chip; 22-LoRa module; 23-4G module; 24-Power supply module. Detailed Implementation

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0028] In the description of this utility model, it should be understood that the terms "left", "right", "front", "rear", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] The present invention will be further described below with specific embodiments, but the scope of protection of the present invention is not limited to the following embodiments.

[0030] Implementation Method 1: As shown in Figure 1, this smart manhole cover status acquisition system based on LoRa communication includes a LoRa monitoring terminal 1 installed on each manhole cover, and a LoRa gateway 2 that communicates with several data collectors via a LoRa network and uploads the data collector signals to a cloud platform. The LoRa monitoring terminal 1 includes a signal acquisition unit 11 for acquiring the status signals of the manhole covers on which the monitoring devices are installed, a main control unit 12 for processing the data, a LoRa communication unit 13 for uploading the processed data, and a power supply unit 14 for powering the system. The signal acquisition unit 11 and the LoRa communication unit 13 are respectively connected to the input and output terminals of the main control unit 12. The power supply unit 14 provides power to the signal acquisition unit 11, the main control unit 12, and the LoRa communication unit 13. The LoRa gateway 2 includes a main control chip 21, a LoRa module 22, a 4G module 23, and a power supply module 24. The LoRa module 22 and the 4G module 23 are respectively connected to the input and output terminals of the main control chip 21. The power supply module 24 provides power to the LoRa gateway 2, including the main control chip 21, the LoRa module 22, and the 4G module 23.

[0031] Implementation Method 2: As shown in Figures 2 to 6, the signal acquisition unit 11 of this LoRa-based intelligent manhole cover status acquisition system includes a LIS3DHTR three-axis gyroscope, a water immersion sensor, and a water level sensor; the main control unit 12 uses an FM33LC025 processing chip; the SPI interface SCK / MOSI / MISO / NSS of the LIS3DHTR three-axis gyroscope is connected to the SPI2 bus pin group PC8 / PC10 / PC9 / PB7 of the main control unit 12, the interrupt pins INT1 / INT2 of the LIS3DHTR three-axis gyroscope are connected to the external interrupt input pins PB2 / PD11 of the main control chip SPI2, the water immersion sensor is connected to the SPI2 bus pin group PC5 / PC6 of the main control unit 12, and the water level sensor is connected to the SPI2 bus pin PC13 of the main control unit 12. The LoRa communication unit 13 uses an E32-433T30S module. Its UART_TX / RX pins are connected to the PA3 / PA2 pins of the main control unit 12, its MD0 / MD1 pins are connected to the PA5 / PA6 pins of the main control unit 12, and its AUX pin is connected to the PB11 pin of the main control unit 12. The power supply unit 14 includes a 3.6V lithium battery pack, which outputs a 3.3V voltage through a TPS63020 step-down chip and connects to the VCC terminal of the signal acquisition unit 11, the VDD terminal of the main control unit 12, and the VBAT terminal of the LoRa communication unit 13, respectively, and supplies a DC 3.3-5V operating voltage to each functional unit. The remaining structures and components are as described in Embodiment 1 and will not be repeated.

[0032] Implementation Method 3: As shown in Figures 6 to 9, the main control chip 21 of this LoRa-based smart manhole cover status acquisition system uses a GD32F103VET6 processing chip; the LoRa module 22 uses an E32-433T30S module, with its UART_TX / RX pins connected to the PA2 / PA3 pins of the main control chip 21, and its MD0 / MD1 pins connected to the PA0 / PA1 pins. The RF interface is connected to the antenna via a 50Ω impedance matching circuit; the 4G module 23 uses an EC800E-CN module, with its UART_TX / RX pins connected to the PB11 / PB10 pins of the main control chip, and its PWRKEY pin connected to the PE13 / PE14 pins. The VBAT power supply terminal is powered off via a MOS transistor controlled by the PCO pin. The input terminal of the power module 24 outputs a DC 5V voltage after passing through a common-mode choke circuit, a TPS54560 step-down chip, and a filter circuit. The remaining structures and components are as described in Implementation Method 1 and will not be repeated.

[0033] During operation: The sensors of the LoRa manhole cover terminal collect data on the status of the manhole cover and the environment inside the manhole, and upload it to the LoRa gateway through the LoRa network. During the process, the LoRa communication module modulates the data into a wireless signal using spread spectrum technology at a specific frequency and power. The LoRa gateway captures low-power long-distance signals with multiple frequency band receiving channels, demodulates and decodes them, extracts the raw data, and after verification, filtering and other processing, uploads the data through 4G according to the management platform's adaptation protocol, realizing the entire process of data collection and transmission.

[0034] This intelligent manhole cover status acquisition system based on LoRa communication overcomes the shortcomings of existing manhole cover monitors, such as limited monitoring items, unsatisfactory communication methods, and high power consumption. By integrating tilt displacement, water immersion, and water level data acquisition and processing, it achieves multi-dimensional composite monitoring of manhole cover status. At the same time, it utilizes the low-power, interference-resistant LoRa network for centralized data relay processing before switching to 4G communication for uploading, ensuring signal quality and stability. By adopting independent power supply for modules and independent operation of units in different working conditions at the monitoring terminal, combined with low-power LoRa communication transmission, the power consumption of the manhole cover terminal equipment is reduced.

[0035] The above description illustrates the main features, basic principles, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments or examples described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments or examples should be considered exemplary and not restrictive. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0036] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A smart manhole cover status acquisition system based on LoRa communication, characterized in that: The system includes LoRa monitoring terminals (1) installed one-to-one on each manhole cover, and a LoRa gateway (2) that communicates with several data collectors via a LoRa network and uploads the data collector signals to a cloud platform. The LoRa monitoring terminal (1) contains a signal acquisition unit (11) for collecting status signals from the manhole covers on which the monitoring device is installed, a main control unit (12) for processing the data, a LoRa communication unit (13) for uploading the processed data, and a power supply unit (14) for powering the system. The signal acquisition unit (11) and the LoRa communication unit (13) are respectively connected to... The main control unit (12) has input and output terminals, and the power supply unit (14) supplies power to the signal acquisition unit (11), the main control unit (12), and the LoRa communication unit (13), respectively. The LoRa gateway (2) includes a main control chip (21), a LoRa module (22), a 4G module (23), and a power supply module (24). The LoRa module (22) and the 4G module (23) are respectively connected to the input and output terminals of the main control chip (21), and the power supply module (24) supplies power to the LoRa gateway (2) including the main control chip (21), the LoRa module (22), and the 4G module (23).

2. The intelligent manhole cover status acquisition system based on LoRa communication according to claim 1, characterized in that: The signal acquisition unit (11) includes a LIS3DHTR three-axis gyroscope, a water immersion sensor, and a water level sensor; the main control unit (12) uses an FM33LC025 processing chip; the SPI interface SCK / MOSI / MISO / NSS of the LIS3DHTR three-axis gyroscope is connected to the SPI2 bus pin group PC8 / PC10 / PC9 / PB7 of the main control unit (12); the interrupt pins INT1 / INT2 of the LIS3DHTR three-axis gyroscope are connected to the external interrupt input pins PB2 / PD11 of the SPI2 of the main control chip; the water immersion sensor is connected to the SPI2 bus pin group PC5 / PC6 of the main control unit (12); and the water level sensor is connected to the SPI2 bus pin PC13 of the main control unit (12).

3. The intelligent manhole cover status acquisition system based on LoRa communication according to claim 2, characterized in that: The LoRa communication unit (13) adopts an E32-433T30S module. Its UART_TX / RX pin is connected to the PA3 / PA2 pin of the main control unit (12), its MD0 / MD1 pin is connected to the PA5 / PA6 pin of the main control unit (12), and its AUX pin is connected to the PB11 pin of the main control unit (12).

4. The intelligent manhole cover status acquisition system based on LoRa communication according to claim 3, characterized in that: The power supply unit (14) includes a 3.6V lithium battery pack, which outputs a 3.3V voltage through a TPS63020 step-down chip and is connected to the VCC terminal of the signal acquisition unit (11), the VDD terminal of the main control unit (12), and the VBAT terminal of the LoRa communication unit (13), respectively, and provides a DC3.3-5V working voltage to each functional unit.

5. The intelligent manhole cover status acquisition system based on LoRa communication according to claim 1, characterized in that: The main control chip (21) uses the GD32F103VET6 processing chip; the LoRa module (22) uses the E32-433T30S module, whose UART_TX / RX pin is connected to the PA2 / PA3 pin of the main control chip (21), and the MD0 / MD1 pin is connected to the PA0 / PA1 pin. The RF interface is connected to the antenna through a 50Ω impedance matching circuit; the 4G module (23) uses the EC800E-CN module, whose UART_TX / RX pin is connected to the PB11 / PB10 pin of the main control chip, and the PWRKEY pin is connected to the PE13 / PE14 pin. The VBAT power supply terminal is powered off through the MOS transistor controlled by the PCO pin.

6. The intelligent manhole cover status acquisition system based on LoRa communication according to claim 5, characterized in that: The input terminal of the power module (24) outputs a DC5V voltage after passing through a common-mode choke circuit, a step-down chip TPS54560, and a filter circuit.

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