CN113219872A - Remote upgrading method of monitoring system of refrigerator car based on real-time perception - Google Patents
Remote upgrading method of monitoring system of refrigerator car based on real-time perception Download PDFInfo
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- CN113219872A CN113219872A CN202110503532.7A CN202110503532A CN113219872A CN 113219872 A CN113219872 A CN 113219872A CN 202110503532 A CN202110503532 A CN 202110503532A CN 113219872 A CN113219872 A CN 113219872A
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
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Abstract
The invention belongs to the field of automatic control systems, and particularly relates to a remote upgrading method for a monitoring system of a refrigerator car based on real-time sensing. The remote upgrading method mainly comprises the processes of system initialization, task function establishment, system upgrading instruction acquisition, system version number comparison, system upgrading file downloading, unpacking, verification and writing of the system upgrading file, system version number establishment and the like. This monitoring system of refrigerator car includes: the intelligent temperature and humidity monitoring system comprises a main control module, a multi-channel temperature and humidity sensor, a GPS positioning module, a door switch state sensor, an NB-IoT communication module, an external memory and a power supply module, wherein the multi-channel temperature and humidity sensor, the GPS positioning module, the door switch state sensor, the NB-IoT communication module, the external memory and the power supply module are electrically connected with the main control module. The monitoring system also comprises a temperature control system, a carriage door state control system, a refrigerator car humidity control system, functional modules in the lighting system and the like. The invention solves the problems that the existing refrigerator car does not have a remote upgrading function and is difficult to expand and maintain in the later period, so that the refrigerator car can adapt to the requirements of different goods on the transportation environment.
Description
Technical Field
The invention belongs to the field of automatic control systems, and particularly relates to a remote upgrading method of a monitoring system of a refrigerator car based on real-time sensing, the monitoring system and the monitoring system.
Background
Cold-chain transportation (Cold-chain transportation) refers to transportation in which the transported goods are kept at a constant temperature during transportation, regardless of the links of loading, unloading, transportation, changing transportation modes, changing packaging equipment, and the like. The transportation mode is mainly applied to the fields with special requirements on the environmental temperature in the transportation process, such as the transportation of biological medicines and fresh products. The cold chain transportation mode can be road transportation, waterway transportation, railway transportation and air transportation, and also can be a comprehensive transportation mode formed by a plurality of transportation modes. Wherein, the vehicle for road transportation is a refrigerator car.
In order to monitor and control the transportation environment in a refrigerator car, a monitoring system and a control system are required. The monitoring system realizes real-time monitoring of various states of the vehicle according to the requirements of the transported products on the transportation environment, and the regulating system regulates the transportation environment of the vehicle according to the vehicle transportation environment state monitored by the monitoring system and the requirements of actually transported goods on the vehicle transportation environment state; such as temperature and humidity control, etc.
Existing refrigerated vehicle monitoring systems are typically customized to the transportation needs of the customer and are therefore only suitable for transporting one or a few products that have similar requirements for the transportation environment. In the face of new shipments, no new monitoring or control strategies can be added. Moreover, the reliability of a part of products on a monitoring system of a cold chain transport vehicle is extremely high, the application scene of the monitoring system of the refrigerated transport vehicle is severe, and laboratory developers cannot completely simulate the use condition of the refrigerated transport vehicle when the refrigerated transport vehicle runs at low temperature and high speed when designing the products, so that once the monitoring system of the refrigerated transport vehicle has a leak of a software part which is not detected out due to incomplete consideration or experimental environment of the developers, serious potential safety hazards can be caused. When a problem occurs in the monitoring system of the customized refrigerator car, unless the controller of the control system is replaced, the leak cannot be repaired in time. However, the refrigerator car is usually in a transportation state for a long time, the positions of the vehicles are dispersed, the controller is difficult to replace in batches, the replacement cost is high, and the problems of cargo safety and transportation efficiency are also caused.
Disclosure of Invention
The invention provides a remote upgrading method of a monitoring system of a refrigerator car based on real-time perception, and aims to solve the problem that the monitoring system and the control system of the refrigerator car in the prior art are difficult to replace and cannot be updated, so that the monitoring system and the control system cannot meet the requirements of different goods on the difference of transportation conditions.
The invention is realized by adopting the following technical scheme:
a remote upgrading method for a monitoring system of a refrigerated vehicle based on real-time perception is applied to the monitoring system of the refrigerated vehicle based on real-time perception with a networking communication function, and realizes remote upgrading of the monitoring system; in the remote upgrading process, a system upgrading instruction and a system upgrading file are issued by a cloud server; the remote upgrading method of the monitoring system comprises the following steps:
step S1: the monitoring system conducts Bootloader starting guidance, reads and writes data or programs in the external memory into the internal memory, clears Flag bits in the external memory, and completes initialization of hardware; then jumping to the APP area, and executing the step S2;
step S2: the monitoring system establishes three task functions which are respectively: task 1: collecting data of various state indexes monitored by the refrigerator car in real time; task 2: networking and uploading the acquired data in the task 1 to the cloud; task 3: downloading a system upgrade file; wherein, the task 3 is in a suspended state in an initial state;
step S3: the monitoring system sequentially executes the tasks 1 and 2 and simultaneously acquires a system upgrading instruction issued by the cloud in the process of networking and uploading information in the task 2;
step S4: the monitoring system makes the following judgment and decision according to whether a system upgrading instruction issued by the cloud is acquired:
(1) when the cloud does not issue a system upgrading instruction, closing the networking state of the monitoring system, entering a low power consumption mode, waiting for a timer alarm clock to wake up the low power consumption mode, and executing the step S3;
(2) when the cloud end issues a system upgrading instruction and the monitored system acquires the system upgrading instruction, the monitoring system shakes hands with a server of the cloud end and requests the version number of an upgrading program;
step S5: the monitoring system obtains the version number of the current monitoring system, and according to the relationship between the version number of the upgrading program at the cloud and the version number of the current monitoring system, the following judgment and decision are made:
(1) when the version number of the upgrading program at the cloud end is consistent with the current version number of the monitoring system, the monitoring system ignores the current upgrading task and enters a low power consumption mode, and meanwhile, the monitoring system waits for the timer alarm clock to wake up the low power consumption mode and then executes the step S3 again;
(2) when the version number of the upgrading program at the cloud is higher than the current version number of the monitoring system, the monitoring system terminates the task 1 and the task 2; simultaneously executing a task 3, and downloading a system upgrade file in the cloud server;
step S6: in the downloading process of the system upgrading file, the monitoring system verifies the downloaded file, writes the system upgrading file into the external memory after the verification is passed, and updates the current monitoring system version number and Flag bit in the external memory after the system upgrading file is completely written;
step S7: and the monitoring system closes the APP area and jumps to a Bootloader starting guide area, and the Bootloader starting guide program reads data in the external memory and writes the data into the internal memory, so that the remote upgrading and updating of the monitoring system of the refrigerated vehicle are completed.
Further, in step S3, the state indexes of the refrigerator car, which are monitored in real time and collected in task 1, include GPS coordinates, environmental temperature and humidity data, and a door switch state, and the GPS coordinates are acquired by a GPS positioning module installed on the refrigerator car; temperature and humidity data are acquired by a plurality of temperature and humidity sensor modules arranged at different positions in a carriage of the refrigerator car; the door open/close state is acquired by a door open/close state sensor installed at the door of the refrigerator car.
Further, in step S5, the cloud server sequentially issues the system upgrade files in the form of continuous fragment packets, and the cloud encrypts each fragment packet; the monitoring system finishes the downloading, the verification and the writing of the system upgrading file into the external memory, and the detailed process of the downloading, the verification and the writing of the system upgrading file is as follows:
a. the monitoring system requests the fragment packets of the system upgrading file issued by the cloud, then carries out decryption and verification on the fragment packets, and makes the following decisions according to the judgment result of the decryption and verification:
(1) when the verification result is incorrect, the fragment packet is requested to the cloud again;
(2) when the verification result is correct, sequentially writing the data in the fragment packet into an external memory;
b. the monitoring system judges whether the fragment packet corresponding to the data currently written into the external memory is the last fragment packet or not, and makes the following decision:
(1) when the current fragment packet in which data writing is finished is not the last fragment packet, the monitoring system requests the next fragment packet from the cloud;
(2) and when the current fragment packet in which the data is written is the last fragment packet, the monitoring system does not send a download request of the fragment packet to the cloud any more, and the download process of the system upgrade file is completed.
Further, the monitoring system realizes networking communication with the cloud terminal through the NB-IoT communication module; and the fragmented packet of the downloaded system upgrade file is signed and transmitted after being unpacked by the NB-IoT communication module.
Further, in step S7, the Bootloader starts the boot program to write the system upgrade file in the external memory to the start position of the bare computer program in the internal memory; and the monitoring system jumps to the APP area after the successful upgrade, so that the monitoring of the vehicle state of the refrigerated vehicle is continuously executed.
The invention also includes a monitoring system of the refrigerator car based on real-time perception, the monitoring system can realize remote upgrade, the monitoring system includes: the system comprises a plurality of multi-path temperature and humidity sensors, a GPS positioning module, a door switch state sensor, a main control module, an NB-IoT communication module and an external memory.
The temperature and humidity monitoring system comprises a plurality of multi-path temperature and humidity sensors, a temperature and humidity sensor and a control module, wherein the plurality of multi-path temperature and humidity sensors are respectively used for acquiring real-time monitoring data of temperature and humidity at different positions in a compartment of the refrigerator car.
The GPS positioning module is used for acquiring a GPS coordinate reflecting the real-time position of the refrigerated vehicle.
The door opening and closing state sensor is used for acquiring the real-time opening and closing state of the refrigerator car carriage door.
The main control module is used for: 1. the method comprises the steps of periodically acquiring real-time monitoring data of a plurality of paths of temperature and humidity sensors, a GPS (global positioning system) positioning module and a door opening and closing state sensor, and uploading the monitoring data to a cloud end; 2. acquiring a system upgrading instruction issued by a cloud, and requesting and downloading a corresponding system upgrading file from the cloud when judging that the version number of an upgrading program of the cloud is higher than the current system version number, so as to complete upgrading of the monitoring system; the main control module also comprises an internal memory, and the internal memory is used for storing operation data generated in the running process of the monitoring system and data exchanged with an external memory.
The NB-IoT communication module is used for realizing networking communication between the main control module and the server at the cloud end and performing bidirectional transmission of instructions and data between the main control module and the server at the cloud end.
The external memory is used for storing a system upgrading file downloaded from the cloud end by the main control module, the version number of the current monitoring system and a Flag bit set in the running process of the monitoring system.
The remote upgrading method of the monitoring system comprises the following steps:
step S1: after the monitoring system is powered on and started to run, Bootloader starting guidance is firstly carried out, data or programs in an external memory are read and written into an internal memory, Flag bits in the external memory are cleared, and initialization of hardware is completed; then jumping to the APP area, and executing the step S2;
step S2: the monitoring system establishes three task functions which are respectively: task 1: collecting data of various state indexes monitored by the refrigerator car in real time; task 2: networking and uploading the acquired data in the task 1 to the cloud; task 3: downloading a system upgrade file; wherein, the task 3 is in a suspended state in an initial state;
step S3: the monitoring system sequentially executes the tasks 1 and 2, and simultaneously acquires a system upgrading instruction issued by the cloud in the networking information uploading process of the task 2:
step S4: the monitoring system makes the following judgment and decision according to whether a system upgrading instruction issued by the cloud is acquired:
(1) when the cloud does not issue a system upgrading instruction, closing the networking state of the monitoring system, entering a low power consumption mode, waiting for a timer alarm clock to wake up the low power consumption mode, and executing the step S3;
(2) when the cloud end issues a system upgrading instruction and the monitored system acquires the system upgrading instruction, the monitoring system shakes hands with a server of the cloud end and requests the version number of an upgrading program;
step S5: the monitoring system obtains the version number of the current monitoring system, and according to the relationship between the version number of the upgrading program at the cloud and the version number of the current monitoring system, the following judgment and decision are made:
(1) when the version number of the upgrading program at the cloud end is consistent with the current version number of the monitoring system, the monitoring system ignores the current upgrading task and enters a low power consumption mode, and meanwhile, the monitoring system waits for the timer alarm clock to wake up the low power consumption mode and then executes the step S3 again;
(2) when the version number of the upgrading program at the cloud is higher than the current version number of the monitoring system, the monitoring system terminates the task 1 and the task 2; simultaneously executing a task 3, and downloading a system upgrade file in the cloud server;
step S6: in the downloading process of the system upgrading file, the monitoring system verifies the downloaded file, writes the system upgrading file into the external memory after the verification is passed, and updates the current monitoring system version number and Flag bit in the external memory after the system upgrading file is completely written;
step S7: the monitoring system closes the APP area and jumps to the Bootloader starting guide area, and the Bootloader starting guide program reads data in the external memory and writes the data into the internal memory, so that remote upgrading and updating of the refrigerator car monitoring system are completed.
Further, in step S5, the cloud server sequentially issues the system upgrade files in the form of continuous fragment packets, and the cloud performs CRC encryption on each fragment packet; the main control module finishes the downloading, the verification and the writing of the system upgrading file into the external memory, and the detailed process of the downloading, the verification and the writing of the system upgrading file is as follows:
a. the main control module requests the cloud to issue the fragment packets of the system upgrade file, the NB-IOT communication module unpacks and signs the received fragment packets, and then transmits the received fragment packets to the main control module to perform CRC (cyclic redundancy check) decryption check, and the main control module makes the following decisions according to the judgment result of the decryption check:
(1) when the verification result is incorrect, the fragment packet is requested to the cloud again;
(2) when the verification result is correct, sequentially writing the data in the fragment packet into an external memory;
b. the main control module judges whether the fragment packet corresponding to the data currently written into the external memory is the last fragment packet or not, and makes the following decision:
(1) when the current fragment packet in which the data writing is finished is not the last fragment packet, requesting a next fragment packet from the cloud;
(2) and when the current fragment packet in which the data is written is the last fragment packet, the downloading request of the fragment packet is not sent to the cloud, and the downloading process of the system upgrading file is finished.
Further, when the monitoring system enters the low power consumption mode, the set period of the timer alarm clock for waking up the low power consumption mode is 2 min.
Furthermore, the monitoring system also comprises a power supply module, and the power supply module is used for supplying power to other functional modules in the running process of the monitoring system. The power supply module comprises a power supply, a charge and discharge management circuit and a voltage stabilizing module; the power supply is a rechargeable lithium battery; the charge and discharge management circuit is used for controlling the charge and discharge state of the lithium battery; the lithium battery supplies power for other functional modules in the monitoring system through the voltage stabilizing module, and the voltage stabilizing module is used for keeping the output voltage of the lithium battery stable.
The invention also comprises a monitoring system of the refrigerator car based on real-time perception, which comprises the monitoring system, wherein the monitoring system formulates a control strategy of the transportation environment state of the refrigerator car according to the transportation environment state of the refrigerator car acquired by the monitoring system in real time and the transportation environment state requirement of the current transported goods issued by the cloud, and issues management control instructions to each execution module for realizing the adjustment of the transportation state of the refrigerator car according to the control strategy; the execution modules for realizing the adjustment of the transportation state of the refrigerator car comprise function modules in a temperature control system of the refrigerator car, and/or function modules in a state control system of a carriage door, and/or function modules in a humidity control system of the refrigerator car, and/or function modules in a lighting system.
The technical scheme provided by the invention has the following beneficial effects:
1. the invention designs a method for automatically upgrading the system based on the existing monitoring system of the refrigerator car with the communication function, thereby laying a foundation for the later-stage function expansion and bug repair of the monitoring system. According to the invention, whether an upgrading instruction is issued by the cloud is sensed in real time by mainly utilizing an NB-IOT wireless communication module carried by a cold chain transport vehicle control module. The safe and stable updating of the controller kernel and the running program is completed through the remote upgrading mode. The system upgrading process is automatically controlled and completed by the main control module, manual intervention is not needed, and the module of the monitoring system is not needed to be replaced manually; this can save cost and reduce the influence on the normal use of the refrigerator car. Therefore, the problem that the existing product is difficult to expand and maintain in the later period due to the fact that the existing product does not have the remote upgrading function is solved.
2. The invention further provides a refrigerator car monitoring system with the system remote upgrading function, and the monitoring system can set different control strategies according to different requirements of goods transported by the refrigerator car on the transportation environment, so that the consistency and the stability of the environment in the carriage in the transportation process are effectively controlled. The product quality in the transportation process is guaranteed. Because this type refrigerator car monitored control system can realize automatic upgrading, consequently it can formulate the transportation environmental control strategy of differentiation to all kinds of different products, can follow the high in the clouds simultaneously and update control system and control strategy to the transportation demand that all kinds of differences traded the article, improved the commonality and the practical value of cold chain transport vechicle greatly.
Drawings
Fig. 1 is a flowchart of an automatic upgrade method for a monitoring system of a refrigerator car based on real-time sensing according to embodiment 1 of the present invention;
FIG. 2 is a schematic block diagram of a monitoring system for a refrigerator car based on real-time sensing according to embodiment 2 of the present invention;
fig. 3 is a circuit diagram of a main control module in embodiment 2 of the present invention;
fig. 4 is a circuit diagram of a GPS positioning module according to embodiment 2 of the present invention;
fig. 5 is a circuit diagram of a multi-channel temperature and humidity sensor in embodiment 2 of the present invention;
fig. 6 is a circuit diagram of a door opening and closing state sensor in embodiment 2 of the present invention;
fig. 7 is a circuit diagram of an NB-IoT communication module in embodiment 2 of the present invention;
FIG. 8 is a circuit diagram of an external memory according to embodiment 2 of the present invention
Fig. 9 is a diagram illustrating division of flash memory areas in the internal memory and the external memory in the main control module according to embodiment 2 of the present invention;
fig. 10 is a block diagram of a monitoring system of a refrigerator car according to embodiment 3 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in fig. 1, the remote upgrade method for the monitoring system of the refrigerator car based on real-time sensing provided in this embodiment is applied to the monitoring system of the refrigerator car based on real-time sensing having a networking communication function, so as to implement remote upgrade of the monitoring system; in the remote upgrading process, a system upgrading instruction and a system upgrading file are issued by a cloud server; the remote upgrading method of the monitoring system comprises the following steps:
step S1: the monitoring system conducts Bootloader starting guidance, reads and writes data or programs in the external memory into the internal memory, clears Flag bits in the external memory, and completes initialization of hardware; then jumping to the APP area, and executing the step S2;
step S2: the monitoring system establishes three task functions which are respectively: task 1: collecting data of various state indexes monitored by the refrigerator car in real time; task 2: networking and uploading the acquired data in the task 1 to the cloud; task 3: downloading a system upgrade file; wherein, the task 3 is in a suspended state in an initial state;
step S3: the monitoring system sequentially executes the task 1 and the task 2, and simultaneously acquires a system upgrading instruction issued by the cloud in the process of networking and uploading information in the task 2;
step S4: the monitoring system makes the following judgment and decision according to whether a system upgrading instruction issued by the cloud is acquired:
(1) when the cloud does not issue a system upgrading instruction, closing the networking state of the monitoring system, entering a low power consumption mode, waiting for a timer alarm clock to wake up the low power consumption mode, and executing the step S3;
(2) when the cloud end issues a system upgrading instruction and the monitored system acquires the system upgrading instruction, the monitoring system shakes hands with a server of the cloud end and requests the version number of an upgrading program;
step S5: the monitoring system obtains the version number of the current monitoring system, and according to the relationship between the version number of the upgrading program at the cloud and the version number of the current monitoring system, the following judgment and decision are made:
(1) when the version number of the upgrading program at the cloud end is consistent with the current version number of the monitoring system, the monitoring system ignores the current upgrading task and enters a low power consumption mode, and meanwhile, the monitoring system waits for the timer alarm clock to wake up the low power consumption mode and then executes the step S3 again;
(2) when the version number of the upgrading program at the cloud is higher than the current version number of the monitoring system, the monitoring system terminates the task 1 and the task 2; simultaneously executing a task 3, and downloading a system upgrade file in the cloud server;
step S6: in the downloading process of the system upgrading file, the monitoring system verifies the downloaded file, writes the system upgrading file into the external memory after the verification is passed, and updates the current monitoring system version number and Flag bit in the external memory after the system upgrading file is completely written;
step S7: the monitoring system closes the APP area and jumps to the Bootloader starting guide area, and the Bootloader starting guide program reads data in the external memory and writes the data into the internal memory, so that automatic updating of the monitoring system of the refrigerated vehicle is completed.
In step S3 of this embodiment, the state indexes of the refrigerator car monitored in real time collected in task 1 include GPS coordinates, environmental temperature and humidity data, and a door open-close state, where the GPS coordinates are obtained by a GPS positioning module installed on the refrigerator car; temperature and humidity data are acquired by a plurality of temperature and humidity sensor modules arranged at different positions in a carriage of the refrigerator car; the door open/close state is acquired by a door open/close state sensor installed at the door of the refrigerator car.
In step S5 of this embodiment, the cloud server sequentially issues the system upgrade files in the form of continuous fragment packets, and the cloud encrypts each fragment packet; the monitoring system finishes the downloading, the verification and the writing of the system upgrading file into the external memory, and the detailed process of the downloading, the verification and the writing of the system upgrading file is as follows:
a. the monitoring system requests the fragment packets of the system upgrading file issued by the cloud, then carries out decryption and verification on the fragment packets, and makes the following decisions according to the judgment result of the decryption and verification:
(1) when the verification result is incorrect, the fragment packet is requested to the cloud again;
(2) when the verification result is correct, sequentially writing the data in the fragment packet into an external memory;
b. the monitoring system judges whether the fragment packet corresponding to the data currently written into the external memory is the last fragment packet or not, and makes the following decision:
(1) when the current fragment packet in which data writing is finished is not the last fragment packet, the monitoring system requests the next fragment packet from the cloud;
(2) and when the current fragment packet in which the data is written is the last fragment packet, the monitoring system does not send a download request of the fragment packet to the cloud any more, and the download process of the system upgrade file is completed.
The monitoring system realizes networking communication with the cloud terminal through the NB-IoT communication module; and the fragmented packet of the downloaded system upgrade file is signed and transmitted after being unpacked by the NB-IoT communication module.
In step S7 of this embodiment, the Bootloader starts the boot program to write the system upgrade file in the external memory into the start position of the bare computer program in the internal memory; and the monitoring system jumps to the APP area after the successful upgrade, so that the monitoring of the vehicle state of the refrigerated vehicle is continuously executed.
Example 2
The present embodiment provides a monitoring system for a refrigerator car, where the monitoring system adopts the automatic upgrade method of embodiment 1 to complete an automatic upgrade process of a system version of the monitoring system. The monitoring system includes: the intelligent temperature and humidity sensor comprises a plurality of multi-path temperature and humidity sensors, a GPS positioning module, a door switch state sensor, a main control module, an NB-IoT communication module, an external memory and a power supply module. The power supply module can be configured in a built-in monitoring system or in an external connection mode, and in the former, the power supply module belongs to one part of the monitoring system; in the latter case, the monitoring system is not part of the monitoring system. In this embodiment, a power supply module is described as a part of a monitoring system, in which the module connection relationship of each functional module is shown in fig. 2.
The temperature and humidity monitoring system comprises a plurality of temperature and humidity sensors, a temperature and humidity sensor and a temperature and humidity sensor, wherein the temperature and humidity sensors are arranged inside a carriage and are used for acquiring real-time monitoring data of temperature and humidity at different positions in the carriage of the refrigerator car. The GPS positioning module is used for acquiring a GPS coordinate reflecting the real-time position of the refrigerated vehicle. The door opening and closing state sensor is installed at the door of the refrigerator car carriage and used for acquiring the real-time opening and closing state of the refrigerator car carriage door.
The main control module is electrically connected with the plurality of multi-path temperature and humidity sensors, the GPS positioning module and the door switch state sensor; the main control module is used for: 1. the method comprises the steps of periodically acquiring real-time monitoring data of a plurality of paths of temperature and humidity sensors, a GPS (global positioning system) positioning module and a door opening and closing state sensor, and uploading the monitoring data to a cloud end; 2. acquiring a system upgrading instruction issued by a cloud, and requesting and downloading a corresponding system upgrading file from the cloud when judging that the version number of an upgrading program of the cloud is higher than the current system version number, so as to complete upgrading of the monitoring system; the main control module also comprises an internal memory, and the internal memory is used for storing operation data generated in the running process of the monitoring system and data exchanged with an external memory.
The NB-IoT communication module is electrically connected with the main control module and is used for realizing networking communication between the main control module and the server at the cloud end and carrying out bidirectional transmission of instructions and data between the main control module and the server at the cloud end.
The external memory is electrically connected with the main control module and used for storing the system upgrading file downloaded by the main control module from the cloud, the version number of the current monitoring system and the Flag bit set in the running process of the monitoring system.
The power supply module is used for supplying power to other functional modules in the operation process of the monitoring system.
Specifically, the main control module in this embodiment adopts a chip of STM32F103C8T6, and a circuit diagram of the main control module is shown in fig. 3 and includes an RAM memory; and contains an internal memory, i.e., an internal flash. In this embodiment, the GPS positioning module uses an L76X GPS chip module supporting multiple satellite systems of GPS, compass (BDS) and QZSS, and a circuit diagram of the GPS positioning module is shown in fig. 4, and the GPS positioning module is connected to the main control module by an RS232 serial port line, so that the received positioning information is transmitted to the main control module. In the SHT30 temperature and humidity sensor used in the multiple paths of temperature and humidity sensors in the embodiment, a circuit diagram of the SHT30 temperature and humidity sensor is shown in fig. 5, the SHT30 temperature and humidity sensor is connected with the main control module through an I2C protocol, the SHT30 temperature and humidity sensor has an address pin, and two temperature and humidity sensors can be mounted on an I2C bus by connecting different high and low levels. In this embodiment, the reed switch is used as a sensing unit of the door switch state sensor, and the circuit diagram of the switch state sensor is shown in fig. 6, and is connected to the main control module through a data line by using an interrupt triggering mode. The NB-IOT communication module in this embodiment employs an NB73 chip, a circuit diagram of the NB73 chip is shown in fig. 7, the NB73 chip is connected to the main control module through an RS232 serial line communication line, and realizes data transmission with the cloud monitoring center through a network, so as to send GPS positioning information, temperature and humidity information, and door state information collected by different sensors. Meanwhile, the NB-IOT communication module is also used for receiving an instruction sent by a server of the cloud remote monitoring center and a file for remote upgrading. The external memory in this embodiment adopts a W25Q64 Flash chip, a circuit diagram of the external memory is shown in fig. 8, and the Flash chip is connected with the main control module through an SPI protocol. The file is not lost after the power failure of the storage chip, and the storage chip is mainly used for receiving and storing the upgrade codes transmitted to the monitoring system terminal in the software upgrade process. The power supply module comprises a power supply, a charge and discharge management circuit and a voltage stabilizing module; the power supply is a rechargeable lithium battery; the charge and discharge management circuit is used for controlling the charge and discharge state of the lithium battery; the lithium battery supplies power for other functional modules in the monitoring system through the voltage stabilizing module, and the voltage stabilizing module is used for keeping the output voltage of the lithium battery stable.
In this embodiment, a division diagram of the internal memory in the main control module and the flash memory area in the external memory is shown in fig. 9.
The remote upgrading method of the monitoring system comprises the following steps:
step S1: after a monitoring system is electrified and started to run, Bootloader starting boot is firstly carried out, data or programs in an external memory (internal flash) are read and written into the internal memory (external flash), Flag bits in the external memory are cleared, and initialization of hardware is completed; specifically, after the monitoring system is powered on, the monitoring system firstly enters Bootloader boot located at 0x08000000-0x8010000 as shown in fig. 3, reads a program stored at the position of 0x02000-0x3FFFFF in external Flash and writes the program into the position of 0x08010000-0x0803FFFF of internal Flash, clears a Flag bit (0x4F4B6F6B) of 0x02000 located at external false, closes a clock and a port opened by the Bootloader boot program after the completion of the clearing, resets an SP stack top pointer by using a __ set _ MSP () instruction in a chip library function of STM32F103C8T6 to realize jumping to an APP area, and executes step S2;
step S2: after entering the APP area, the monitoring system calls a FreeRTOS to establish three task functions, which are respectively: task 1: collecting data of various state indexes monitored by the refrigerator car in real time; task 2: networking and uploading the acquired data in the task 1 to the cloud; task 3: downloading a system upgrade file; wherein, the task 3 is in a suspended state in an initial state;
step S3: the monitoring system sequentially executes the tasks 1 and 2, and simultaneously acquires a system upgrading instruction issued by the cloud in the networking information uploading process in the task 2;
step S4: usually, the cloud server should issue within 10 seconds of the instruction reported by the main control module, otherwise, the monitoring system will close the NB-IOT networking function, and the monitoring system makes the following judgment and decision according to whether to obtain the system upgrade instruction issued by the cloud:
(1) when the cloud does not issue a system upgrading instruction, closing the networking state of the monitoring system, entering a low power consumption mode, waiting for a timer alarm clock to wake up the low power consumption mode, and executing the step S3;
(2) when the cloud end issues a system upgrading instruction and the monitored system acquires the system upgrading instruction, the monitoring system shakes hands with a server of the cloud end and requests the version number of an upgrading program; wherein, the system upgrade program of the new version needs to use an SCB- > VTOR ═ 0x08010000 instruction to reset the interrupt vector table of the STM32F103C8T 6;
step S5: the monitoring system obtains the version number of the current monitoring system, and according to the relationship between the version number of the upgrading program at the cloud and the version number of the current monitoring system, the following judgment and decision are made:
(1) when the version number of the upgrading program at the cloud end is consistent with the current version number of the monitoring system, the monitoring system ignores the current upgrading task and enters a low power consumption mode, and meanwhile, the monitoring system waits for the timer alarm clock to wake up the low power consumption mode and then executes the step S3 again;
(2) when the version number of the upgrading program at the cloud is higher than the current version number of the monitoring system, the monitoring system terminates the task 1 and the task 2; simultaneously executing a task 3, and downloading a system upgrade file in the cloud server;
step S6: in the downloading process of the system upgrade file, the monitoring system checks the downloaded file, writes the system upgrade file into an external memory after the verification is passed, and after the system upgrade file is completely written, a main control module of the monitoring system updates a Version number (such as Vx.xx) and a Flag bit (0x4F4B6F6B) in external Flash;
step S7: the monitoring system stops the jump of the APP area to the Bootloader starting guide, the Bootloader starting guide reads data in the external memory and writes the data into the internal memory, and the address is 0x08010000-0x0803 FFFF; and finishing the remote upgrading and updating of the monitoring system of the refrigerated vehicle.
In step S5, the cloud server sequentially issues the system upgrade files in the form of continuous fragment packets, and the cloud performs CRC encryption on each fragment packet; the main control module finishes the downloading, the verification and the writing of the system upgrading file into the external memory, and the detailed process of the downloading, the verification and the writing of the system upgrading file is as follows:
a. the main control module requests the cloud to issue the fragment packets of the system upgrade file, the NB-IOT communication module unpacks and signs the received fragment packets, and then transmits the received fragment packets to the main control module to perform CRC (cyclic redundancy check) decryption check, and the main control module makes the following decisions according to the judgment result of the decryption check:
(1) when the verification result is incorrect, the fragment packet is requested to the cloud again;
(2) when the verification result is correct, sequentially writing the data in the fragment packet into an external memory;
b. the main control module judges whether the fragment packet corresponding to the data currently written into the external memory is the last fragment packet or not, and makes the following decision:
(1) when the current fragment packet in which the data writing is finished is not the last fragment packet, requesting a next fragment packet from the cloud;
(2) and when the current fragment packet in which the data is written is the last fragment packet, the downloading request of the fragment packet is not sent to the cloud, and the downloading process of the system upgrading file is finished.
When the monitoring system enters the low power consumption mode, the set period of the timer alarm clock for waking up the low power consumption mode is 2 min.
Example 3
The invention also comprises a monitoring system of the refrigerator car, as shown in fig. 10, the monitoring system comprises the monitoring system of the refrigerator car as in embodiment 2, and the monitoring system belongs to a subsystem of the monitoring system; in the monitoring system, the monitoring system formulates a control strategy of the transportation environment state of the refrigerated vehicle according to the transportation environment state of the refrigerated vehicle acquired by the monitoring system in real time and the transportation environment state requirement of the current transported goods issued by a cloud terminal; and issuing management control instructions to each execution module for realizing the adjustment of the transportation state of the refrigerated vehicle according to the control strategy.
The execution modules for realizing the adjustment of the transportation state of the refrigerator car comprise functional modules in a temperature control system of the refrigerator car, functional modules in a humidity control system of the refrigerator car, functional modules in an illumination system and the like.
In this monitored control system, the high in the clouds can be uploaded to the details of the current goods of transporting of vehicle, the high in the clouds server is according to the acquisition of current transportation to the environmental requirement of the current goods of transporting to the cold chain transport vechicle of monitoring system issue, for example what humiture environment should keep, the illumination environment, the degree of ventilation etc. after monitoring system received these instructions, can monitor the real-time condition of vehicle, then formulate corresponding control strategy according to the target environment demand, make the transportation environment of current vehicle reach the target environment demand of the goods of transporting, and continuously monitor and regulate and control. Meanwhile, the monitoring system also adopts the method as embodiment 1 to remotely upgrade the system.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A remote upgrading method for a monitoring system of a refrigerator car based on real-time perception is applied to the monitoring system of the refrigerator car based on real-time perception with a networking communication function, and remote upgrading of the monitoring system is realized; in the remote upgrading process, a system upgrading instruction and a system upgrading file are issued by a cloud server; the remote upgrading method of the monitoring system is characterized by comprising the following steps:
step S1: the monitoring system conducts Bootloader starting guidance, reads and writes data or programs in the external memory into the internal memory, clears Flag bits in the external memory, and completes initialization of hardware; then jumping to the APP area, and executing the step S2;
step S2: the monitoring system establishes three task functions which are respectively: task 1: collecting data of various state indexes monitored by the refrigerator car in real time; task 2: networking and uploading the acquired data in the task 1 to the cloud; task 3: downloading a system upgrade file; wherein the task 3 is in a suspended state in an initial state;
step S3: the monitoring system sequentially executes the task 1 and the task 2, and simultaneously acquires a system upgrading instruction issued by the cloud end in the process of networking and uploading information in the task 2;
step S4: the monitoring system makes the following judgment and decision according to whether the system upgrading instruction issued by the cloud is acquired:
(1) when the cloud does not issue the system upgrading instruction, the networking state of the monitoring system is closed, the monitoring system enters a low power consumption mode, a timer alarm clock is waited to wake up the low power consumption mode, and the step S3 is executed;
(2) when the cloud end issues the system upgrading instruction and is acquired by the monitoring system, the monitoring system shakes hands with a server of the cloud end and requests the version number of an upgrading program;
step S5: the monitoring system obtains the version number of the current monitoring system, and according to the relationship between the version number of the upgrading program of the cloud and the version number of the current monitoring system, the following judgment and decision are made:
(1) when the version number of the upgrading program at the cloud end is consistent with the current version number of the monitoring system, the monitoring system ignores the current upgrading task and enters a low power consumption mode, and meanwhile, the monitoring system waits for the timer alarm clock to wake up the low power consumption mode and then executes the step S3 again;
(2) when the version number of the upgrading program of the cloud is higher than the current version number of the monitoring system, the monitoring system terminates the task 1 and the task 2; simultaneously executing a task 3, and downloading the system upgrade file in the cloud server;
step S6: in the downloading process of the system upgrading file, the monitoring system verifies the downloaded file and writes the system upgrading file into the external memory after the verification is passed, and after the system upgrading file is completely written, the monitoring system updates the current monitoring system version number and the Flag bit in the external memory;
step S7: the monitoring system closes the APP area, skips to the Bootloader starting guide area, the Bootloader starting guide program reads data in the external memory and writes the data into the internal memory, and remote upgrading and updating of the refrigerated vehicle monitoring system are completed.
2. A method for remote upgrade of a real time sensing based monitoring system for a refrigerated vehicle as claimed in claim 1 wherein: in the step S3, the state indexes of the refrigerator car, which are acquired in the task 1 and monitored in real time, include GPS coordinates, environment temperature and humidity data, and a door opening and closing state, and the GPS coordinates are acquired by a GPS positioning module installed on the refrigerator car; the temperature and humidity data are acquired by a plurality of temperature and humidity sensor modules arranged at different positions in a carriage of the refrigerator car; the door open-close state is acquired by a door open-close state sensor installed at a compartment door of the refrigerator car.
3. A method for remote upgrade of a real time sensing based refrigerator car monitoring system as claimed in claim 2, wherein: in step S5, the cloud server sequentially issues the system upgrade files in the form of continuous fragment packets, and the cloud terminal encrypts each fragment packet; the monitoring system finishes the downloading and the verification of the system upgrading file and writes the system upgrading file into an external memory, and the detailed process of the downloading, the verification and the writing of the system upgrading file is as follows:
a. the monitoring system requests the fragment packets of the system upgrading file issued by the cloud, then carries out decryption verification on the fragment packets, and makes the following decisions according to the judgment result of the decryption verification:
(1) when the verification result is incorrect, the fragment packet is requested to the cloud again;
(2) when the verification result is correct, sequentially writing the data in the fragment packet into an external memory;
b. the monitoring system judges whether the fragment packet corresponding to the data currently written into the external memory is the last fragment packet or not, and makes the following decision:
(1) when the current fragment packet in which data writing is finished is not the last fragment packet, the monitoring system requests the next fragment packet from the cloud;
(2) and when the current fragment packet in which data writing is finished is the last fragment packet, the monitoring system does not send a download request of the fragment packet to the cloud any more, and the download process of the system upgrade file is finished.
4. A method for remote upgrade of a real time sensing based refrigerator car monitoring system as claimed in claim 3 wherein: the monitoring system realizes networking communication with the cloud terminal through an NB-IoT communication module; and the downloaded fragment packets of the system upgrade file are signed and transmitted after being unpacked by the NB-IoT communication module.
5. A method for remote upgrade of a real time sensing based monitoring system for a refrigerated vehicle as claimed in claim 1 wherein: in the step S7, the Bootloader starts the boot program to write the system upgrade file in the external memory into the initial position of the bare computer program in the internal memory; and the monitoring system jumps to the APP area after the successful upgrade, so that the monitoring of the vehicle state of the refrigerated vehicle is continuously executed.
6. The utility model provides a monitoring system of refrigerator car based on real-time perception, monitoring system can realize long-range upgrading which characterized in that: the monitoring system includes:
the temperature and humidity monitoring system comprises a plurality of multi-path temperature and humidity sensors, a temperature and humidity sensor and a control module, wherein the multi-path temperature and humidity sensors are respectively used for acquiring real-time monitoring data of temperature and humidity at different positions in a compartment of the refrigerator car;
the system comprises a GPS positioning module, a data processing module and a control module, wherein the GPS positioning module is used for acquiring a GPS coordinate reflecting the real-time position of the refrigerator car;
the door opening and closing state sensor is used for acquiring the real-time opening and closing state of the refrigerator car carriage door;
a master control module for: 1. the method comprises the steps of periodically acquiring real-time monitoring data of a plurality of paths of temperature and humidity sensors, a GPS (global positioning system) positioning module and a door switch state sensor, and uploading the monitoring data to a cloud end; 2. acquiring a system upgrading instruction issued by a cloud, and requesting and downloading a corresponding system upgrading file from the cloud when judging that the version number of an upgrading program of the cloud is higher than the current system version number, so as to complete upgrading of the monitoring system; the main control module also comprises an internal memory, and the internal memory is used for storing operation data generated in the running process of the monitoring system and data exchanged with an external memory;
the NB-IoT communication module is used for realizing networking communication between the main control module and the server of the cloud end and performing bidirectional transmission of instructions and data between the main control module and the server of the cloud end; and
the external memory is used for storing a version number of the current monitoring system and a Flag bit set in the running process of the monitoring system, wherein the system upgrade file is downloaded from the cloud end by the main control module;
the remote upgrading method of the monitoring system comprises the following steps:
step S1: after the monitoring system is started to operate, Bootloader starting guidance is firstly carried out, data or programs in an external memory are read and written into an internal memory, Flag bits in the external memory are cleared, and initialization of hardware is completed; then jumping to the APP area, and executing the step S2;
step S2: the monitoring system establishes three task functions which are respectively: task 1: collecting data of various state indexes monitored by the refrigerator car in real time; task 2: networking and uploading the acquired data in the task 1 to a cloud; task 3: downloading a system upgrade file; wherein the task 3 is in a suspended state in an initial state;
step S3: the monitoring system sequentially executes the tasks 1 and 2, and simultaneously acquires a system upgrading instruction issued by the cloud in the process of networking and uploading information in the task 2:
step S4: the monitoring system makes the following judgment and decision according to whether a system upgrading instruction issued by the cloud is acquired:
(1) when the cloud does not issue a system upgrading instruction, the networking state of the monitoring system is closed, the monitoring system enters a low power consumption mode, meanwhile, a timer alarm clock is waited to wake up the low power consumption mode, and the step S3 is executed;
(2) when the cloud end issues a system upgrading instruction and is acquired by the monitoring system, the monitoring system shakes hands with a server of the cloud end and requests the version number of an upgrading program;
step S5: the monitoring system obtains the version number of the current monitoring system, and according to the relationship between the version number of the upgrading program of the cloud and the version number of the current monitoring system, the following judgment and decision are made:
(1) when the version number of the upgrading program at the cloud end is consistent with the current version number of the monitoring system, the monitoring system ignores the current upgrading task and enters a low power consumption mode, and meanwhile, the monitoring system waits for the timer alarm clock to wake up the low power consumption mode and then executes the step S3 again;
(2) when the version number of the upgrading program of the cloud is higher than the current version number of the monitoring system, the monitoring system terminates the task 1 and the task 2; simultaneously executing the task 3, and downloading a system upgrade file in the cloud server;
step S6: in the downloading process of the system upgrade file, the monitoring system verifies the downloaded file and writes the system upgrade file into the external memory after the verification is passed, and after the system upgrade file is completely written, the monitoring system updates the current monitoring system version number and the Flag bit in the external memory;
step S7: the monitoring system closes the APP area, skips to the Bootloader starting guide area, the Bootloader starting guide program reads data in the external memory and writes the data into the internal memory, and remote upgrading and updating of the refrigerated vehicle monitoring system are completed.
7. A refrigerator car monitoring system based on real-time sensing as claimed in claim 6 wherein: in step S5, the cloud server sequentially issues the system upgrade files in the form of continuous fragment packets, and the cloud performs CRC encryption on each fragment packet; the main control module finishes the downloading and the verification of the system upgrading file and writes the system upgrading file into the external memory, and the detailed process of the downloading, the verification and the writing of the system upgrading file is as follows:
a. the main control module requests the cloud to issue the fragment packets of the system upgrade file, the NB-IOT communication module unpacks and signs the received fragment packets, and then transmits the received fragment packets to the main control module to perform CRC (cyclic redundancy check) decryption check, and the main control module makes the following decisions according to the judgment result of the decryption check:
(1) when the verification result is incorrect, the fragment packet is requested to the cloud again;
(2) when the verification result is correct, sequentially writing the data in the fragment packet into an external memory;
b. the main control module judges whether the fragment packet corresponding to the data currently written into the external memory is the last fragment packet or not, and makes the following decision:
(1) when the current fragment packet in which the data writing is finished is not the last fragment packet, requesting a next fragment packet from the cloud;
(2) and when the current fragment packet in which the data is written is the last fragment packet, the downloading request of the fragment packet is not sent to the cloud, and the downloading process of the system upgrading file is finished.
8. A refrigerator car monitoring system based on real-time sensing as claimed in claim 6 wherein: when the monitoring system enters the low power consumption mode, the set period of the timer alarm clock for waking up the low power consumption mode is 2 min.
9. A refrigerator car monitoring system based on real-time sensing as claimed in claim 6 wherein: the monitoring system also comprises a power supply module, wherein the power supply module is used for supplying power to other functional modules in the running process of the monitoring system; the power supply module comprises a power supply, a charge and discharge management circuit and a voltage stabilizing module; the power supply is a rechargeable lithium battery; the charge and discharge management circuit is used for controlling the charge and discharge state of the lithium battery; the lithium battery supplies power for other functional modules in the monitoring system through the voltage stabilizing module, and the voltage stabilizing module is used for keeping the output voltage of the lithium battery stable.
10. The utility model provides a monitored control system of refrigerator car based on real-time perception which characterized in that: the monitoring system comprises the monitoring system as claimed in any one of claims 6 to 9, and is configured to formulate a control strategy of the transportation environment state of the refrigerator car according to the transportation environment state of the refrigerator car acquired by the monitoring system in real time and the transportation environment state requirement of the current transportation goods issued by the cloud, and issue a management control instruction to each execution module for realizing the adjustment of the transportation state of the refrigerator car according to the control strategy; the execution modules for realizing the adjustment of the transportation state of the refrigerator car comprise function modules in a temperature control system of the refrigerator car, and/or function modules in a state control system of a carriage door, and/or function modules in a humidity control system of the refrigerator car, and/or function modules in a lighting system.
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