Road high-precision temperature monitoring terminal and system

Abstract

The utility model provides a road high-precision temperature monitoring terminal and system, which relates to the technical field of smart cities and comprises a lithium-thionyl chloride battery pack serving as a power supply, an input type water level probe with an RS485 interface, a temperature probe with an RS485 interface, a flexible NB-IoT antenna and a monitor mainboard. According to the utility model, the water level probe and the temperature probe are connected with the interior of the terminal through the RS485 interface and are installed on the detected ground, and the microcontroller is matched and communicates with the low-power-consumption NB-IoT module BC260Y-CN through the UART interface via the level conversion circuit. The microcontroller performs data access on the two probes through an RS485 communication interface provided by the MAX485 so as to obtain sampling data, and uploads the data to an Internet of Things platform in a message form, so that data transmission is more accurate.

Description

Technical Field

[0001] This utility model relates to the field of smart city technology, and in particular to a high-precision temperature monitoring terminal and system for roads. Background Technology

[0002] With my country's rapid economic growth and accelerated urbanization, urban transportation has undergone significant changes. Although many public transportation options, such as shared bicycles and rail transit, have been developed in recent years to alleviate traffic congestion, the number of private vehicles continues to rise. Traditional road transportation remains an essential and primary mode of transport for urban residents.

[0003] Therefore, when roads become unusable due to weather conditions or unforeseen accidents, it causes numerous unnecessary troubles for urban residents who rely on roads for transportation. Sudden, torrential rains can cause flooding on certain sections of the city, affecting traffic efficiency; a sudden drop in temperature can cause roads to freeze and become slippery, potentially leading to vehicles drifting or brake failure; intense sunlight can cause road surface temperatures to rise excessively, potentially causing tire pressure spikes and blowouts for vehicles traveling at high speeds. Real-time monitoring of road conditions and timely handling of emergencies are increasingly becoming essential tasks for urban management.

[0004] In recent years, smart cities, supported by information and communication technologies, have improved urban operational efficiency and public service levels through scientific information processing. With the rapid development of science and technology and the arrival of the information society, smart cities have become a new direction for urban planning. Monitoring road water accumulation and road temperature can be effectively integrated with smart city construction, providing solutions. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a high-precision temperature monitoring terminal and system for roads.

[0006] This utility model is achieved through the following technical solution: a high-precision temperature monitoring terminal for roads, characterized in that it includes a lithium-ion battery pack as a power source, an RS485 interface-equipped submersible water level probe, an RS485 interface-equipped temperature probe, a flexible NB-IoT antenna, and a monitoring motherboard. The monitoring motherboard includes two RS485 interfaces for communicating with the probe, a low-power NB-IoT communication module, an onboard temperature sensor, a boost power supply circuit, and a low-power microcontroller (MCU) with STOP mode.

[0007] The lithium-ion battery pack, the monitor motherboard, and the NB-IoT antenna are installed inside the terminal housing. The water level probe and the temperature probe are connected to the inside of the terminal via an RS485 interface and installed at the ground location to be monitored.

[0008] The RS485 interface submersible water level probe uses a silicon piezoresistive sensor with a stainless steel isolation diaphragm as the signal measurement unit. The sensor signal is converted into a standard output signal through the amplification circuit inside the stainless steel housing, and the hydraulic data is converted into a liquid level depth value and stored in the internal register.

[0009] The flexible NB-IoT antenna can be installed inside the terminal housing;

[0010] The monitor motherboard uses the low-power microcontroller STM32L151RCT6 as the core of its logic operations. When idle, the microcontroller enters STOP mode to reduce power consumption, with a static current of only uA. This motherboard is used to control various electrical components and transmit signals. The NB-IoT module of the monitor motherboard communicates with the base station via an antenna, transmitting collected data and other information to the IoT service platform and application server. In cases where the base station signal is poor, an external rod antenna can be introduced to the outside of the terminal casing via an adapter cable to improve the wireless communication environment.

[0011] The lithium-ion battery pack is a parallel combination of a high-capacity lithium battery and a high-performance power capacitor. This battery pack can output a stable 3.6V standard voltage and maintains significant stability throughout its entire lifespan. The battery pack is connected to the power input terminal of the device's mainboard via wires. The battery pack uses clean and environmentally friendly materials, facilitating the disposal of used batteries.

[0012] The battery pack is connected to the power input terminal of the device's mainboard via wires.

[0013] The RS485 interface submersible water level probe is suitable for measuring room temperature liquid media, can operate stably for a long time, and provides an RS485 communication interface for information transmission. The monitoring motherboard can read the measured liquid level value through it. For communication, the microcontroller accesses the data from the two probes through the RS485 communication interface provided by MAX485 to obtain sampled data. The microcontroller communicates with the low-power NB-IoT module BC260Y-CN through a UART interface and a level conversion circuit. The BC260Y-CN module has a wide voltage input of 2.2V to 4.5V. The static current of the module after entering PSM sleep mode is 0.8uA, which meets the requirements of lithium battery power supply as a power input. The boost circuit adopts the TPS613222A chip solution to convert the 3.7V output of the lithium battery to 5V to supply the water level probe and temperature probe, and can provide a maximum current of 1.1A. The microcontroller accesses the data from the two probes through the RS485 communication interface provided by MAX485 to obtain sampled data, and uploads the data to the IoT platform in the form of messages.

[0014] The microcontroller can access the onboard temperature sensor TMP102 via the IIC interface to obtain the ambient temperature of the motherboard, which is used to compare the road surface temperature collected by the temperature probe.

[0015] A high-precision road temperature monitoring system includes the aforementioned high-precision road temperature monitoring terminal, as well as a base station and an Internet of Things (IoT) platform. The high-precision road temperature monitoring terminal transmits information on road water accumulation and ground temperature to the IoT platform via the base station.

[0016] The beneficial effects of this utility model are:

[0017] 1. The RS485 interface submersible water level probe uses a silicon piezoresistive sensor with a stainless steel diaphragm as the signal measurement unit. The sensor signal is converted into a standard output signal by the amplification circuit inside the stainless steel housing, and the hydraulic data is converted into a liquid level depth value and stored in the internal register. This probe is suitable for measuring liquid media at room temperature, can work stably for a long time, and provides an RS485 communication interface. The monitoring motherboard can read the measured liquid level value through it.

[0018] 2. The water level probe and temperature probe are connected to the terminal via an RS485 interface and installed on the ground to be monitored. Together with the microcontroller, the microcontroller communicates with the low-power NB-IoT module BC260Y-CN via a UART interface and a level conversion circuit. The microcontroller accesses the data from the two probes through the RS485 communication interface provided by the MAX485 to obtain the sampled data, and then uploads the data to the IoT platform in the form of messages, making the data transmission more accurate. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the modules of this utility model.

[0020] Figure 2 This is a circuit diagram of the present invention.

[0021] In the diagram: 1. Lithium-ion battery pack; 2. Submersible water level probe with RS485 interface; 3. Temperature probe with RS485 interface; 4. Flexible NB-IoT antenna; 5. Monitor motherboard; Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and preferred embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0023] Example 1

[0024] As attached Figure 1-2 As shown, this embodiment provides a high-precision road temperature monitoring terminal, including a lithium-ion battery pack 1 as a power source, an RS485 interface-equipped submersible water level probe 2, an RS485 interface-equipped temperature probe 3, a flexible NB-IoT antenna 4, and a monitoring motherboard 5. The monitoring motherboard 5 includes two RS485 interfaces for communicating with the probes, a low-power NB-IoT communication module, an onboard temperature sensor, a boost power supply circuit, and a low-power microcontroller (MCU) with STOP mode.

[0025] The lithium-ion battery pack 1, the monitor motherboard 5, and the NB-IoT antenna 4 are installed inside the terminal housing. The water level probe and temperature probe are connected to the inside of the terminal via an RS485 interface and installed at the ground location to be monitored.

[0026] The RS485 interface submersible water level probe uses a silicon piezoresistive sensor with a stainless steel isolation diaphragm as the signal measurement unit. The sensor signal is converted into a standard output signal through the amplification circuit inside the stainless steel housing, and the hydraulic data is converted into a liquid level depth value and stored in the internal register.

[0027] The flexible NB-IoT antenna 4 can be installed inside the terminal housing;

[0028] The monitor motherboard 5 uses the low-power microcontroller STM32L151RCT6 as the core of logic operation. When idle, the microcontroller enters STOP mode to reduce power consumption. At this time, the static current is only at the uA level. This monitor motherboard is used to control various electrical components and transmit signals.

[0029] Furthermore, such as Figure 1 As shown, the lithium-ion battery pack 1 is a parallel combination of a high-capacity lithium battery and a high-performance power capacitor. This battery pack can output a stable standard voltage of 3.6V and maintain significant stability throughout its entire lifespan. The battery pack is connected to the power input terminal of the device's mainboard via wires. This battery pack uses clean and environmentally friendly materials, facilitating the disposal of used batteries.

[0030] Furthermore, such as Figure 1 As shown, the battery pack is connected to the power input terminal of the device's mainboard via wires for power supply.

[0031] Furthermore, such as Figure 1 As shown, the RS485 interface submersible water level probe is suitable for measuring liquid media at room temperature. It can work stably for a long time and provides an RS485 communication interface for information transmission. The monitoring motherboard can read the measured liquid level value through it.

[0032] Furthermore, such as Figure 1 As shown, the NB-IoT module of the monitor motherboard 5 communicates with the base station through the antenna, transmitting collected data and other information to the IoT service platform and application server; in cases where the base station signal is poor, an external rod antenna can be introduced to the outside of the terminal casing through an adapter cable to transmit signals and improve the wireless communication environment.

[0033] Furthermore, such as Figure 2 As shown, the microcontroller can access the onboard temperature sensor TMP102 via the IIC interface to obtain the ambient temperature of the motherboard, which is used to compare the road surface temperature collected by the temperature probe.

[0034] Furthermore, such as Figure 2 As shown, in terms of communication, the microcontroller accesses data from the two probes through the RS485 communication interface provided by the MAX485 to obtain sampled data. The microcontroller communicates with the low-power NB-IoT module BC260Y-CN through the UART interface and a level conversion circuit. The BC260Y-CN module has a wide voltage input of 2.2V to 4.5V, and the static current after the module enters PSM sleep mode is 0.8uA, which meets the requirements of lithium battery power supply as the power input. The boost circuit adopts the TPS613222A chip solution to convert the 3.7V output from the lithium battery to 5V to supply the water level probe and temperature probe, and can provide a maximum current of 1.1A. The microcontroller accesses data from the two probes through the RS485 communication interface provided by the MAX485 to obtain sampled data, and uploads the data to the IoT platform in the form of messages.

[0035] Example 2

[0036] This embodiment discloses a high-precision road temperature monitoring system, including the aforementioned high-precision road temperature monitoring terminal, as well as a base station and an Internet of Things (IoT) platform. The high-precision road temperature monitoring terminal transmits information on road water accumulation and ground temperature to the IoT platform via the base station.

[0037] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A high-precision temperature monitoring terminal for roads, characterized in that, It includes a lithium-ion battery pack as a power source, an RS485 interface submersible water level probe, an RS485 interface temperature probe, a flexible NB-IoT antenna, and a monitoring motherboard. The monitoring motherboard includes two RS485 interfaces for communicating with the probe, a low-power NB-IoT communication module, an onboard temperature sensor, a boost power supply circuit, and a low-power microcontroller (MCU) with STOP mode. The lithium-ion battery pack, the monitor motherboard, and the NB-IoT antenna are installed inside the terminal housing. The water level probe and the temperature probe are connected to the inside of the terminal via an RS485 interface and installed at the ground location to be monitored. The RS485 interface submersible water level probe uses a silicon piezoresistive sensor with a stainless steel isolation diaphragm as the signal measurement unit. The sensor signal is converted into a standard output signal through the amplification circuit inside the stainless steel housing, and the hydraulic data is converted into a liquid level depth value and stored in the internal register. The flexible NB-IoT antenna can be installed inside the terminal housing; The monitor motherboard uses the low-power microcontroller STM32L151RCT6 as the core of logic operation. When idle, the microcontroller enters STOP mode to reduce power consumption. At this time, the static current is only in the uA level. This monitor motherboard is used to control various electrical components and transmit signals.

2. The high-precision road temperature monitoring terminal according to claim 1, characterized in that, The lithium-ion battery pack is a parallel combination of a high-capacity lithium battery and a high-performance power supply capacitor, and the battery pack can output a stable standard voltage of 3.6V.

3. The high-precision road temperature monitoring terminal according to claim 1, characterized in that, The battery pack is connected to the power input terminal of the device's mainboard via wires.

4. The high-precision road temperature monitoring terminal according to claim 1, characterized in that, The RS485 interface submersible water level probe is suitable for measuring liquid media at room temperature and provides an RS485 communication interface for information transmission. The monitoring motherboard can read the measured liquid level value through it.

5. The high-precision road temperature monitoring terminal according to claim 1, characterized in that, The NB-IoT module of the monitor motherboard communicates with the base station through an antenna to transmit collected data and other information to the Internet of Things service platform and application server; The signal transmission can be achieved by using an adapter cable to connect an external rod antenna to the outside of the terminal housing.

6. The high-precision road temperature monitoring terminal according to claim 1, characterized in that, The microcontroller can access the onboard temperature sensor TMP102 via the IIC interface to obtain the ambient temperature of the motherboard, which is used as a reference to compare the road surface temperature collected by the temperature probe. In terms of communication, the microcontroller accesses the two probes through the RS485 communication interface provided by the MAX485 to obtain the sampled data.

7. A high-precision road temperature monitoring system, characterized in that, The high-precision road temperature monitoring terminal, as described in any one of claims 1-6, further includes a base station and an Internet of Things (IoT) platform. The high-precision road temperature monitoring terminal transmits information on road water accumulation and ground temperature to the IoT platform via the base station.

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