WO2023155466A1 - Terminal system for integrally monitoring information of refrigerated truck - Google Patents

Abstract

Provided is a terminal system for integrally monitoring information of a refrigerated truck. The terminal system comprises a touch display screen; an ARM core board and a driving recording module, a GPS module, a 4G communication module and a reserved communication interface which are controlled by the ARM core board; an STM32 chip and a refrigerating unit temperature control, working fault display and alarm module, a carriage interior and exterior temperature and humidity monitoring and data storage and alarm module, an in-carriage loaded-cargo weight data monitoring module, a carriage door opening/closing state display and warning module, a whole truck oil level monitoring module, an in-carriage personnel trapping alarm module, and an in-carriage electrical system control module which are controlled by the STM32 chip. The touch screen is connected to the ARM core board and the STM32 chip; the in-carriage loaded-cargo weight data monitoring module is used for performing weight monitoring by means of a carbon fiber net-type tray (1), and the center position and four corners of the carbon fiber net-type tray (1) are provided with displacement deformation sensors (2). Images are uploaded to a terminal of the touch screen by means of the ARM core board, the STM32 chip and a driving recorder, thereby helping staffs to know the inside and outside of the refrigerated truck on one touch screen, and monitor various operation state information of the refrigerated truck in real time.

Description

A terminal system for integrated monitoring of refrigerated truck information technical field

The invention relates to the technical field of cold chain vehicle-mounted terminals, in particular to a terminal system for integrated monitoring of refrigerated vehicle information.

Background technique

As an indispensable part of the logistics and transportation industry, cold chain transportation is very important to ensure that fruits and vegetables, seafood, medicines, etc. during transportation do not deteriorate. The process of transportation always exists in various stages. It is very meaningful for food safety and drug safety to know the state of the vehicle and the environment of the goods during the transportation process. To establish a complete monitoring system, one is to ensure that the transport personnel can timely grasp the changes in the environment of the goods during the refrigerated transportation as much as possible, and the other is that the remote monitoring terminal can observe the location of the refrigerated truck in real time. The environment in which the goods are located. The application of container state detection technology and monitoring technology can also ensure that in the event of loss of goods, the real-time situation of the loss of goods can be directly known. Transport personnel can also adjust the temperature and humidity in the transport container in time according to the real-time monitoring screen in the cab. The existing various terminal systems of cold chain vehicles are various and cannot be integrated, resulting in the deployment of various devices on the driving platform of cold chain vehicles, which affects driving safety.

In addition, there is a problem of detecting the weight data of the goods inside the car in the field of refrigerated car technology. The most brutal way is to add a weight sensor to the chassis of the vehicle, because there are relevant regulations on vehicle safety, and it is not allowed to make any changes that affect the overall safety structure. The current way is to measure the weight of the vehicle through the weighbridge. But the accuracy of the weighbridge, as well as the car pressing up and jumping over, are not so accurate in themselves. There are also refrigerated vehicles that contain fresh and frozen food. If there is a temperature fluctuation (the driver often secretly turns off the refrigeration and air conditioner to save fuel), the fresh food itself will change after thawing. Therefore, it is still necessary to deploy a more accurate and special weight measurement system on the refrigerated truck with modern means.

Contents of the invention

The present invention provides a terminal system for integrated monitoring of refrigerated vehicle information with simple structure, convenient use, time saving, comprehensive and accurate data collection.

The object of the present invention is achieved in this way: a terminal system for integrated monitoring of refrigerated vehicle information, characterized in that the terminal system includes:

touch screen;

ARM core board and its control: driving record module, GPS module, 4G communication module and reserved communication interface;

STM32 chip and its control: temperature control of refrigerating unit, working failure display and alarm module; temperature and humidity monitoring and data storage inside and outside the car, alarm and warning module; cargo weight data monitoring module inside the car; car door switch status display and warning module; Vehicle oil level monitoring module; cabin personnel trapped alarm warning module; cabin electrical system control module;

The touch screen is connected with the ARM core board and STM32 chip.

The terminal system integrates signal acquisition and data communication on one PCB board; the data acquisition module is composed of STM32 core circuit, 2 CAN bus interfaces, 2 RS485 interfaces, GPIO ports, analog input ports and power circuits.

Preferably, the terminal system adopts a TD321SCAN series SMD single-channel universal CAN isolated transceiver module, and a port surge protection circuit is added outside the module.

Preferably, the TD321S485H-A series SMD single-channel high-speed RS485 isolated transceiver module is used in the RS485 circuit, and the SP00S12 module is used to ensure the reliability of the RS485 bus communication.

Preferably, the STM32 chip is a 64-pin STM32F401RCT6 chip.

Preferably, the driving record module uses a driving recorder with 4 channels of display, wherein the composite image of 1 channel is output to the ARM core board.

Preferably, in the temperature and humidity monitoring and data storage inside and outside the car, and the alarm and warning module, temperature and humidity transmitters are respectively installed inside and outside the car, and then connected to the main board through the RS485 bus to realize temperature and humidity data collection.

Preferably, in the compartment door switch status display and warning module, an inductive proximity switch is installed on the door frame to detect the door opening status, and the detection pin is connected to the PCB board to realize door switch signal collection.

Preferably, in the weight data monitoring module of the cargo loaded inside the compartment, a carbon fiber mesh pallet is used for weight monitoring.

The carbon fiber grid tray is installed inside the compartment, and the center and four corners of the carbon fiber grid tray are provided with displacement and deformation sensors.

Beneficial effects of the present invention: 1. By uploading the image display of the ARM core board, STM32 chip and driving recorder to the terminal of the touch screen, it helps the staff understand the situation inside and outside the refrigerated vehicle on a touch screen, and monitors the condition of the refrigerated vehicle in real time Various operating status information can also be accurately queried for historical work conditions.

2. Improve the reliability of bus communication through the core circuit in the STM32 chip, CAN bus interface, RS485 interface, GPIO port, analog input port and power circuit, and combine signal acquisition and signal output, which is conducive to saving the space of the driving platform and reducing Driving safety hazards, convenient for staff to use.

3. By using the tray made of carbon fiber, the carbon fiber can improve the characteristics of tensile strength and corrosion resistance, and reduce unnecessary waste. The tray of mesh format can help fresh water drain, and the displacement deformation sensor can help convert the weight change of the goods. , to achieve precise monitoring.

Description of drawings

Fig. 1 is a system frame diagram of the present invention.

Fig. 2 is a structural schematic diagram of a grid tray.

Among them, 1 is a grid tray, and 2 is a displacement deformation sensor.

Detailed ways

The present invention is further outlined below in conjunction with accompanying drawing.

As shown in Figure 1, a terminal system for integrated monitoring of refrigerated vehicle information, the terminal system includes a touch screen, an ARM core board and a driving record module controlled by it, a GPS module, a 4G communication module and a reserved communication interface; and STM32 chip and its control: temperature control of refrigerating unit, working failure display and alarm module; temperature and humidity monitoring and data storage inside and outside the car, alarm and warning module; cargo weight data monitoring module inside the car; car door switch status display and warning module; Vehicle oil level monitoring module; cabin personnel trapped alarm warning module; cabin electrical system control module; touch screen is connected with ARM core board and STM32 chip. The 4G communication module is responsible for the communication between the main control and the cloud server.

Further, for temperature and humidity monitoring and data storage inside and outside the car, temperature and humidity transmitters are installed inside and outside the car respectively, and connected to the main board through the RS485 bus to realize temperature and humidity data collection; Type proximity switch detection needs to be installed on the door frame; the detection pin is connected to the main board to realize the signal acquisition of door opening and closing.

Furthermore, the terminal system integrates signal acquisition and data communication on one PCB; the data acquisition module consists of STM32 core circuit, 2 CAN bus interfaces, 2 RS485 interfaces, GPIO ports, analog input ports and power circuits.

Furthermore, the STM32 chip is a 64-pin STM32F401RCT6 chip. The TD321S485H-A series SMD single-channel high-speed RS485 isolated transceiver module is used in the RS485 circuit, and the SP00S12 module is used to ensure the reliability of the RS485 bus communication.

Further, the driving recording module uses a driving recorder with 4 channels of display, of which the composite image of 1 channel is output to the ARM core board.

Further, in the weight data monitoring module of the cargo loaded inside the carriage, a carbon fiber grid tray 1 is used for weight monitoring. The carbon fiber grid tray 1 is installed inside the carriage, and the center position and four corners of the carbon fiber grid tray 1 are provided with displacement deformation sensor 2.

Working principle: a terminal system for integrated monitoring of refrigerated truck information, which is mainly divided into data acquisition and data communication, and the data acquisition and data communication are integrated on a 7-inch touch screen, and the data acquisition is mainly through the input/output port of the STM32 chip Control, CAN bus communication, RS485 bus communication, GPIO port, analog input port and power supply circuit are collected, CAN bus communication can choose TD321SCAN series SMD single-channel universal CAN isolated transceiver module to improve the reliability of bus communication, and The CAN bus communication circuit can be added with a port surge protection circuit, which can protect the module from being damaged when it is in a harsh field environment, such as a large-energy lightning strike. In RS485 bus communication, D321S485H-A series SMD single-channel high-speed RS485 isolated transceiver module can be selected to improve the reliability of bus communication, and the analog quantity will be defined by the physical quantity that changes continuously in time and value.

Furthermore, the ARM core board is mainly used for touch screen control, video display of the driving recorder, and map functions. Data interaction is realized by connecting with the STM32 chip. The 4G module is responsible for the communication between the main control and the cloud server. The 4G module is small in size and low in power consumption. . The image display of the driving recorder is connected to the touch screen interface, and the touch screen can display the situation of the driving recorder; the video information can be encrypted and protected, and it has a video storage function.

Furthermore, the monitoring of the weight data of the goods loaded inside the compartment in the implementation of the STM32 chip shows that by installing a grid-shaped tray 1 made of carbon fiber in the compartment, the center position and four corners of the grid-shaped tray 1 are provided with displacement deformation sensors. 2. The grid tray 1 made of carbon fiber has the characteristics of tensile strength, corrosion resistance, and small change with temperature; when the frozen goods are placed on it, it can be converted by the displacement and deformation of two sensors, and the specific position can be calculated by using the azimuth. cargo weight. No matter how the goods are placed, the specific weight of the goods can be calculated more accurately. At the same time, the grid design is adopted. If the fresh food is thawed, the water or ice slag will penetrate the grid to the lower layer. As the temperature of the temperature sensor in the car changes, the higher the temperature, the faster the water loss of fresh food will occur. By grasping the change of time value and temperature value, as well as the numerical analysis of the original weight, the weight of fresh food after loss can be grasped; Effectively, the weight calculation error is within plus or minus 0.5 kg. For the calculation of the weight of the goods in the compartment, it can be completed at the cold chain terminal.

Among them, Tables 1-6 are the interface descriptions of the STM32 core chip.

Table 1 is the description of the analog input interface

interface name	describe
Analog 4-20mA input 1	Site oil level
Analog 4-20mA input 2	Refrigerator oil level
Analog 4-20mA input 3	load cell
Analog 4-20mA input 4	spare
Analog 4-20mA input 5	spare
Analog 4-20mA input 6	spare
Analog 4-20mA input 7	spare
Analog 4-20mA input 8	spare
Analog 4-20mA input 9	spare
Analog 4-20mA input 10	spare

Table 2 is the RS485 interface description

interface name	describe
RS485 1	Temperature and Humidity Transmitter
RS485 2	spare

Table 3 is CAN interface description; Table 4 is other interface description

interface name	describe
CAN1	spare
CAN2	spare

Table 4 is the description of other interfaces

Table 5 is the description of the transistor input interface

Table 6 is the relay output description

The above descriptions are only embodiments of the present invention, and are not intended to limit the present invention. Various modifications and variations of the present invention will occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims (10)

1. A terminal system for integrated monitoring of refrigerated vehicle information, characterized in that the terminal system includes:

   touch screen;

   ARM core board and its control: driving record module, GPS module, 4G communication module and reserved communication interface;

   STM32 chip and its control: temperature control of refrigerating unit, working failure display and alarm module; temperature and humidity monitoring and data storage inside and outside the car, alarm and warning module; cargo weight data monitoring module inside the car; car door switch status display and warning module; Vehicle oil level monitoring module; cabin personnel trapped alarm warning module; cabin electrical system control module;

   The touch screen is connected with the ARM core board and STM32 chip.
2. A terminal system for integrated monitoring of refrigerated vehicle information according to claim 1, wherein the terminal system integrates signal acquisition and data communication on one PCB board; the data acquisition module consists of STM32 core circuit, 2 One CAN bus interface, two RS485 interfaces, GPIO port, analog input port and power supply circuit.
3. A terminal system for integrated monitoring of refrigerated vehicle information according to claim 2, wherein the terminal system adopts a TD321SCAN series SMD single-channel universal CAN isolated transceiver module, and port surge protection is added outside the module circuit.
4. A terminal system for integrated monitoring of refrigerated vehicle information according to claim 2, characterized in that, the SMD single-channel high-speed RS485 isolated transceiver module of TD321S485H-A series is used in the RS485 circuit, and the SP00S12 module is used to ensure RS485 bus communication reliability.
5. The terminal system for integrated monitoring of refrigerated vehicle information according to any one of claims 1-4, characterized in that the STM32 chip is a 64-pin STM32F401RCT6 chip.
6. The terminal system for integrated monitoring of refrigerated vehicle information according to claim 5 is characterized in that, the driving recording module uses a driving recorder with 4 channels of display, and the composite image of 1 channel is output to the ARM core board.
7. According to claim 5, a terminal system for integrated monitoring of refrigerated vehicle information is characterized in that, in the temperature and humidity monitoring, data storage, and alarm warning modules inside and outside the vehicle compartment, temperature and humidity transmitters are respectively installed inside and outside the vehicle The device is connected to the main board through the RS485 bus to realize temperature and humidity data collection.
8. According to claim 5, a terminal system for integrated monitoring of refrigerated vehicle information is characterized in that, in the compartment door switch state display and warning module, an inductive proximity switch is installed on the door frame to detect the door opening state, and the detected The pin is connected to the PCB board to realize the signal acquisition of the switch door.
9. The terminal system for integrated monitoring of refrigerated vehicle information according to claim 5, characterized in that, in the weight data monitoring module of goods loaded inside the vehicle compartment, a carbon fiber grid tray (1) is used for weight monitoring.
10. According to claim 9, a terminal system for integrated monitoring of refrigerated vehicle information, characterized in that, the carbon fiber mesh tray (1) is installed inside the compartment, and the center position of the carbon fiber mesh tray (1) is the same as Displacement deformation sensors (2) are arranged on the four corners.

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