Cold chain transportation temperature recorder

Abstract

According to the technical scheme, the cold chain transportation temperature recorder is characterized by comprising a Bluetooth communication unit; a temperature sensor; the control unit is electrically connected with the Bluetooth communication unit and the temperature sensor and is used for receiving and processing a temperature signal returned by the temperature sensor; a high-precision temperature sensor and a real-time data transmission system are adopted, it is ensured that in the cold chain transportation process, even under the extreme temperature condition, accurate temperature records can be provided, temperature fluctuation can be effectively monitored and controlled, the quality of transported goods is guaranteed, meanwhile, an irreversible recording module records data through an EEPROM or a Flash ROM, and the data recording efficiency is improved. Once the data is written in, the data cannot be modified, the risk of data tampering is avoided, the AES encryption algorithm is combined, all the recorded data are encrypted, the security and tampering-proof capability of the data are further improved, and the design ensures that the transportation failure event and the related data can be reliably stored, so that the security of the data is improved. And an accurate basis is provided for subsequent analysis and responsibility investigation.

Description

Technical Field

[0001] The present invention relates to the technical field of cold chain transportation temperature recording, and in particular to a cold chain transportation temperature recorder. Background Art

[0002] In the field of modern logistics and transportation, especially for cold chain transportation that requires strict temperature control, such as medicine, food and cosmetics, temperature monitoring and recording are key links to ensure the quality and safety of goods.

[0003] Traditional temperature recording methods often rely on mechanical or simple electronic recorders. These methods have some significant drawbacks, such as:

[0004] 1. Traditional temperature recording instruments often fail to monitor temperature comprehensively under extreme temperature conditions due to insufficient measurement accuracy or data transmission delays, and are unable to detect and respond to temperature anomalies during transportation in a timely manner.

[0005] 2. The data recording method of traditional recorders lacks effective data encryption and protection mechanisms, and the recorded data may be tampered with or forged during transportation;

[0006] 3. In addition, the temperature recording equipment in the prior art cannot generate alarm signals and notify relevant personnel in real time, resulting in slow response in the case of abnormal temperature. At the same time, the lack of effective self-checking and data verification mechanisms may result in equipment failures not being discovered in time, thereby affecting the integrity of the data and the reliability of the system;

[0007] To solve the above problems, we propose a cold chain transportation temperature recorder. Summary of the invention

[0008] In view of the deficiencies in the prior art, the present invention provides a cold chain transportation temperature recorder to solve the problems raised in the background technology.

[0009] The above technical objectives of the present invention are achieved through the following technical solutions:

[0010] A cold chain transportation temperature recorder, comprising:

[0011] Bluetooth communication unit, used for two-way data communication with external handheld devices, transmits temperature data and alarm information through low-power Bluetooth protocol, ensuring the stability of data communication during long-term transportation;

[0012] A temperature sensor is used to obtain ambient temperature information. The temperature sensor has a high-precision measurement function and can detect temperature changes in the range of -40°C to +85°C to ensure temperature monitoring accuracy in different cold chain environments;

[0013] A control unit is electrically connected to the Bluetooth communication unit and the temperature sensor, and is used to receive and process the temperature signal sent back by the temperature sensor. The control unit is configured to monitor the temperature signal in real time, and transmit the temperature information to an external handheld device in real time through the Bluetooth communication unit, while monitoring whether the temperature exceeds a first preset temperature threshold (set value I) or is lower than a second preset temperature threshold (set value II).

[0014] Preferably, the control unit has the following functions:

[0015] When the temperature signal exceeds the preset upper temperature limit value I or is lower than the preset lower temperature limit value II, the control unit generates and sends an alarm signal to the external handheld device. The alarm signal includes detailed information of the abnormal temperature and the time when the alarm occurs;

[0016] The control unit starts the timing module to record the duration of the abnormal state, and when the duration exceeds the preset time threshold T1, generates a transport failure event log, and sends a transport failure report to the external handheld device through the Bluetooth communication unit.

[0017] Preferably, the control unit further comprises:

[0018] An irreversible recording module is used to write the transport failure event and related data (including abnormal temperature, duration, event occurrence time, etc.) into a read-only memory (ROM). The memory is configured so that once the data is written, it cannot be deleted or modified by any software or hardware means to ensure the irreversibility of the record;

[0019] The irreversible recording module also includes a data encryption function, which encrypts and stores all recorded data to enhance data security and tamper-proof capabilities.

[0020] Preferably, the implementation scheme of the irreversible recording module includes:

[0021] Use non-volatile memory (such as EEPROM or Flash ROM) to generate a unique record ID each time a record is made and store the relevant data together with the ID to prevent the data from being overwritten or modified;

[0022] During the data writing process, write protection technology is adopted, that is, after the writing operation is completed, the memory automatically switches to read-only mode to ensure that the data cannot be changed once recorded.

[0023] Preferably, the data encryption function includes:

[0024] Encrypt recorded data using a symmetric encryption algorithm (such as AES) to ensure data confidentiality during storage and transmission;

[0025] Encryption keys are stored in a protected storage area and can only be accessed under authorized conditions to further prevent data from being illegally accessed or tampered with.

[0026] Preferably, the control unit further comprises:

[0027] The data verification module is used to generate a checksum when recording each piece of data and to perform verification during data reading or transmission to ensure the integrity and accuracy of the data.

[0028] Preferably, the control unit further comprises:

[0029] The fault self-check module regularly performs self-checks on the working status of the temperature sensor, Bluetooth communication unit and the control unit itself during the startup or operation of the equipment. When a fault is detected, it sends a fault warning message to an external handheld device through the Bluetooth communication unit and records the time and type of the fault so that timely maintenance and repair can be carried out.

[0030] Preferably, it also includes:

[0031] The reset processing module is used to restart the temperature monitoring function through physical operation after the abnormal situation is resolved. The reset operation also generates a reset event log and stores it in the read-only memory to ensure that the processing process of each abnormal situation is recorded and traceable.

[0032] Preferably, the Bluetooth communication unit is configured to be able to establish connections with multiple external handheld devices simultaneously, and to ensure the security of data transmission through encryption protocols, thereby ensuring the synchronous sharing of temperature data and the timely transmission of abnormal alarms between multiple monitoring points.

[0033] Preferably, the temperature sensor includes multiple independent temperature measurement points, which are distributed at different positions of the cold chain container. Each measurement point is connected to the control unit through an independent signal channel. The control unit can monitor and record the temperature data of each measurement point separately, so as to provide more comprehensive temperature distribution information during the cold chain transportation process.

[0034] Preferably, the control unit is further configured to automatically store relevant temperature data, alarm information and timing data after each abnormal temperature event occurs, and transmit these data in the form of a report to an external handheld device via a Bluetooth communication unit for subsequent analysis and optimization of cold chain transportation management.

[0035] Preferably, it also includes:

[0036] A data storage module is used to automatically store all temperature data and abnormal event records collected by the temperature sensor when the Bluetooth communication is interrupted or the device runs out of power to ensure the integrity and continuity of the data; the data storage module has a data encryption function to prevent the data from being tampered with during transportation.

[0037] In summary, the present invention mainly has the following beneficial effects:

[0038] 1. The use of high-precision temperature sensors and real-time data transmission systems can accurately measure and transmit the ambient temperature in the range of -40°C to +85°C in real time. This ensures that during the cold chain transportation process, accurate temperature records can be provided even under extreme temperature conditions, effectively monitoring and controlling temperature fluctuations and ensuring the quality of transported goods.

[0039] 2. The irreversible recording module uses EEPROM or Flash ROM to record data. Once the data is written, it cannot be modified, avoiding the risk of data tampering. Combined with the AES encryption algorithm, all recorded data is encrypted, further improving the security and anti-tampering capabilities of the data. This design ensures that transportation failure events and related data can be reliably stored, providing an accurate basis for subsequent analysis and accountability.

[0040] 3. The control unit monitors the temperature data in real time and generates an alarm signal when the temperature exceeds the set threshold, notifying the handheld device in time to quickly handle abnormal situations. The data verification module generates a checksum to ensure that the data has not been tampered with or damaged during transmission and storage, thereby improving the integrity and accuracy of the data. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a system block diagram of the present invention. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0043] The following examples are used to illustrate the present invention, but they cannot be used to limit the scope of protection of the present invention. The conditions in the examples can be further adjusted according to specific conditions. Simple improvements to the method of the present invention under the premise of the concept of the present invention belong to the scope of protection claimed in the present invention.

[0044] refer to Figure 1, a cold chain transportation temperature recorder, including: a Bluetooth communication unit, a temperature sensor, a control unit, an irreversible recording module, a data verification module, a fault self-detection module, a reset processing module and a data storage module.

[0045] Among them, the Bluetooth communication unit uses the Nordic Semiconductor nRF52 series BLE module to establish a stable connection with the handheld device to ensure the reliability of data transmission;

[0046] Among them, the temperature sensor (TMP117) is connected to the control unit through the I2C interface, which can measure the temperature in the range of -40℃ to +85℃ in real time and transmit the data to the control unit;

[0047] The control unit is responsible for processing temperature data, real-time monitoring and comparing with the set temperature threshold. When the temperature exceeds the preset upper or lower threshold, the control unit generates an alarm signal and sends the alarm information to the handheld device through the Bluetooth communication unit;

[0048] The irreversible recording module uses EEPROM or Flash ROM to record transportation failure events and related data. Once the data is written, it cannot be changed, and the AES encryption algorithm is used to ensure the security and tamper-proof of the data.

[0049] The data verification module generates checksums during recording and transmission to ensure the integrity and accuracy of the data;

[0050] The fault self-check module performs self-checks periodically when the device is started or running. If a fault is found, a warning message is generated and the fault type is recorded;

[0051] The reset processing module allows the user to restart the temperature monitoring function through physical operation after the abnormality is resolved, and generates a reset event log;

[0052] The data storage module automatically saves all data when Bluetooth communication is interrupted or the battery is exhausted, and encrypts it to prevent the data from being tampered with.

[0053] The present invention can accurately measure the ambient temperature in the range of -40℃ to +85℃. This high-precision measurement function ensures that temperature data can be accurately recorded even under extreme temperature conditions. The real-time data transmission function ensures that every temperature change during transportation can be accurately recorded, thereby improving the temperature monitoring accuracy during transportation.

[0054] The irreversible recording module equipped in this recorder uses EEPROM or Flash ROM to record transportation failure events and related data. Once the data is written, it cannot be modified or deleted, ensuring the data’s immutability. At the same time, the module uses the AES encryption algorithm to encrypt all recorded data, further improving data security. This design not only prevents data tampering, but also provides reliable data integrity protection. This mechanism is crucial for subsequent accountability and analysis optimization.

[0055] Although the embodiments of the present invention have been shown and described, it is understandable to those skilled in the art that, unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "including" or "comprising" and the like used in the present invention mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. The words "connect" or "connected" and the like are not limited to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. "Up", "down", "left", "right", etc. are only used to indicate relative position relationships. When the absolute position of the described object changes, the relative position relationship may also change accordingly.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cold chain transport temperature recorder, characterized in that: include: Bluetooth communication unit, used for two-way data communication with external handheld devices, transmits temperature data and alarm information through low-power Bluetooth protocol, ensuring the stability of data communication during long-term transportation; A temperature sensor is used to obtain ambient temperature information. The temperature sensor has a high-precision measurement function and can detect temperature changes in the range of -40°C to +85°C to ensure temperature monitoring accuracy in different cold chain environments; A control unit is electrically connected to the Bluetooth communication unit and the temperature sensor, and is used to receive and process the temperature signal sent back by the temperature sensor. The control unit is configured to monitor the temperature signal in real time, and transmit the temperature information to an external handheld device in real time through the Bluetooth communication unit, while monitoring whether the temperature exceeds a first preset temperature threshold (set value I) or is lower than a second preset temperature threshold (set value II).

2. A cold chain transport temperature recorder according to claim 1, characterized in that: The control unit has the following functions: When the temperature signal exceeds the preset upper temperature limit value I or is lower than the preset lower temperature limit value II, the control unit generates and sends an alarm signal to the external handheld device. The alarm signal includes detailed information of the abnormal temperature and the time when the alarm occurs; The control unit starts the timing module to record the duration of the abnormal state, and when the duration exceeds the preset time threshold T1, generates a transport failure event log, and sends a transport failure report to the external handheld device through the Bluetooth communication unit.

3. A cold chain transport temperature recorder according to claim 2, characterized in that: The control unit further comprises: An irreversible recording module is used to write the transport failure event and related data (including abnormal temperature, duration, event occurrence time, etc.) into a read-only memory (ROM). The memory is configured so that once the data is written, it cannot be deleted or modified by any software or hardware means to ensure the irreversibility of the record; The irreversible recording module also includes a data encryption function, which encrypts and stores all recorded data to enhance data security and tamper-proof capabilities.

4. A cold chain transport temperature recorder according to claim 3, characterized in that: The implementation scheme of the irreversible recording module includes: Use non-volatile memory (such as EEPROM or Flash ROM) to generate a unique record ID each time a record is made and store the relevant data together with the ID to prevent the data from being overwritten or modified; During the data writing process, write protection technology is adopted, that is, after the writing operation is completed, the memory automatically switches to read-only mode to ensure that the data cannot be changed once recorded.

5. A cold chain transport temperature recorder according to claim 4, characterized in that: The data encryption function includes: Encrypt recorded data using a symmetric encryption algorithm (such as AES) to ensure data confidentiality during storage and transmission; Encryption keys are stored in a protected storage area and can only be accessed under authorized conditions to further prevent data from being illegally accessed or tampered with.

6. A cold chain transport temperature recorder according to claim 5, characterized in that: The control unit also includes: The data verification module is used to generate a checksum when recording each piece of data and to perform verification during data reading or transmission to ensure the integrity and accuracy of the data.

7. A cold chain transport temperature recorder according to claim 6, characterized in that: The control unit also includes: The fault self-check module regularly performs self-checks on the working status of the temperature sensor, Bluetooth communication unit and the control unit itself during the startup or operation of the equipment. When a fault is detected, it sends a fault warning message to an external handheld device through the Bluetooth communication unit and records the time and type of the fault so that timely maintenance and repair can be carried out.

8. A cold chain transport temperature recorder according to claim 7, characterized in that: Also includes: The reset processing module is used to restart the temperature monitoring function through physical operation after the abnormal situation is resolved. The reset operation also generates a reset event log and stores it in the read-only memory to ensure that the processing process of each abnormal situation is recorded and traceable.

9. A cold chain transport temperature recorder according to claim 8, characterized in that: The Bluetooth communication unit is configured to establish connections with multiple external handheld devices at the same time, and ensure the security of data transmission through encryption protocols, thereby ensuring the synchronous sharing of temperature data and the timely transmission of abnormal alarms between multiple monitoring points.

10. A cold chain transportation temperature recorder according to claim 7, characterized in that: The temperature sensor includes multiple independent temperature measurement points, which are distributed at different positions of the cold chain container. Each measurement point is connected to the control unit through an independent signal channel. The control unit can monitor and record the temperature data of each measurement point separately, so as to provide more comprehensive temperature distribution information during the cold chain transportation process.

11. A cold chain transportation temperature recorder according to claim 7, characterized in that: The control unit is further configured to automatically store relevant temperature data, alarm information and timing data after each abnormal temperature event occurs, and transmit these data in the form of a report to an external handheld device via a Bluetooth communication unit for subsequent analysis and optimization of cold chain transportation management.

12. A cold chain transportation temperature recorder according to claim 7, characterized in that: Also includes: A data storage module is used to automatically store all temperature data and abnormal event records collected by the temperature sensor when the Bluetooth communication is interrupted or the device runs out of power to ensure the integrity and continuity of the data; the data storage module has a data encryption function to prevent the data from being tampered with during transportation.

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