A tank container temperature control method and system based on the Internet of Things

Abstract

The present invention discloses a tank container temperature control method and system based on the Internet of Things, comprising the following steps: a temperature control system monitors the temperature environment in the tank container; adjusts the temperature control mode in the tank container; and prompts a control terminal when a single temperature control sequence is detected to be finished. The present invention analyzes the temperature change process in the tank container based on the temperature detection results of the temperature control system at different positions of the tank container, controls the tank container to switch the temperature control mode at an appropriate time point, and enables the tank temperature control system to change in advance the upcoming sudden change in external temperature, so that the temperature of the cargo in the container can meet the temperature requirements of the internal cargo under various circumstances. The present invention has the characteristics of high temperature control detection accuracy and strong cargo temperature control capability.

Description

Technical Field

[0001] The present invention relates to the technical field of container temperature measurement, and in particular to a tank container temperature control method and system based on the Internet of Things. Background Art

[0002] As an ideal packaging and transportation tool for liquids, gases and various dangerous goods, tank containers have been recognized by more and more users for their unique comprehensive advantages of safety, speed, efficiency and low cost, and their utilization rate is constantly rising. In order to heat or adjust the temperature of the medium transported inside the tank container, it is necessary to set a temperature control system at the bottom or top of the tank container, so the temperature control system has become an important part of the tank container.

[0003] In the prior art, the control terminal on the transport vehicle detects the temperature inside the tank container and adjusts the temperature of the cargo in the tank container through the temperature control system. However, in the process of adjusting the temperature of the cargo in the container in the temperature control mode, it often takes a period of time to control the temperature in the tank container within the preset range. Especially when the ambient temperature changes, the temperature in the container will be affected by the external temperature. Even if the speed of temperature change in the container is adjusted by mode switching, there will still be a transition period during the mode switching process. The speed of temperature change of the cargo in the tank container may be higher than the temperature control speed of the temperature control system, resulting in the lack of a reasonable temperature in the tank container for a considerable period of time, resulting in problems in the safe storage of cargo. Therefore, it is very necessary to design a tank container temperature control method and system based on the Internet of Things with high temperature control detection accuracy and strong cargo temperature control capability. Summary of the invention

[0004] The purpose of the present invention is to provide a tank container temperature control method and system based on the Internet of Things to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a tank container temperature control method based on the Internet of Things, comprising the following steps:

[0006] Step S1: The control terminal on the tank container transporting vehicle is connected to the tank container temperature control system, and the temperature control system monitors the temperature environment in the tank container;

[0007] Step S2: The operation modes of the temperature control system include a full temperature control mode, an intermittent temperature control mode, a self-balancing circulation mode and a temperature control balance mode. The temperature control system in a single tank container undergoes a full temperature control mode, an intermittent temperature control mode, a self-balancing circulation mode and a temperature control balance mode, which is a temperature control sequence. The temperature control system adjusts the temperature control mode in the tank container according to the analysis results of the temperature change process in the tank container after detecting that the temperature change in the container reaches a preset standard;

[0008] Step S3: During the process of the temperature control system adjusting the temperature in the container, a prompt is given to the control terminal when the end of a single temperature control sequence is detected.

[0009] According to the above technical solution, step S2 includes:

[0010] Step S21: The control terminal is arranged on the side of the tank container, and is composed of a control cabinet, a refrigeration and heating unit, a measuring device, a circulation channel installed outside the tank body, and a refrigerant. The measuring device monitors the temperature of the cargo in real time and feeds back the temperature to the control cabinet. The control cabinet performs logical judgment based on the fed-back temperature monitoring data, and issues instructions to the refrigeration unit and the heating unit. The refrigeration unit and the heating unit start to execute the corresponding refrigeration and heating instructions.

[0011] Step S22: The measuring device detects the temperature environment in the tank container in real time. If the measuring device detects that the temperature requirement of the goods stored in the tank container is high and the temperature range of the environment outside the current tank container is changed, the ambient temperature outside the tank container is specifically detected to obtain whether the temperature regulation ability of the tank container itself for the goods in the container can maintain the temperature requirement of the goods in the container within the normal standard. If not, the temperature control system in the tank container is started, and the temperature control mode of the current temperature control system is detected through the control terminal in the container. The temperature control system controls the tank container to switch the temperature control mode at an appropriate time point according to the prediction result, and transmits the information of the temperature control mode switching back to the control terminal.

[0012] According to the above technical solution, step S22 includes:

[0013] Step S221: After receiving the temperature adjustment information, the control terminal detects the temperature value of the surface of the cargo in the tank container through the first temperature sensor, the second temperature sensor, the third temperature sensor and the fourth temperature sensor arranged in the tank container, and obtains the monitoring temperature values ​​corresponding to the current different positions, wherein the first temperature sensor is arranged on the outer contact surface of the random cargo in the tank container, and the temperature detected by the first temperature sensor is t1, the second temperature sensor is arranged on the inner wall of the tank container, and the temperature detected by the second temperature sensor is t2, the third temperature sensor is arranged on the roof of the tank container transport vehicle, and the temperature detected by the third temperature sensor is t3, the fourth temperature sensor is arranged on the outer wall of the refrigerant device, and the temperature detected by the fourth temperature sensor is t4;

[0014] Step S222: If the temperature difference between the ambient temperature t3 outside the tank container detected by the third temperature sensor and the temperature t2 inside the container detected by the second temperature sensor is higher than the initial temperature difference setting value △T0, the control cabinet issues a command to the refrigeration and heating units to stop working;

[0015] Step S223: When the measuring device detects that the temperature t1 detected by the first temperature sensor is higher than the cargo temperature setting value T, the system starts the full temperature control mode; when the refrigerant detection temperature t4 is lower than the difference between the cargo setting temperature T and the temperature difference setting value △T1, the system enters the intermittent temperature control mode; when the first temperature sensor detects the temperature t1 lower than the sum of the cargo setting temperature T and the temperature difference setting value △T2, the system enters the self-balancing circulation mode; when the first temperature sensor detects the temperature t1 lower than the sum of the cargo setting temperature T and 1 / 2 of the temperature difference setting value △T3, the system enters the temperature control balance mode.

[0016] According to the above technical solution, in step S223, when the temperature adjustment mode is the full temperature adjustment mode, the adjustment method performed by the temperature adjustment system is specifically:

[0017] The time required for the detected temperature of the first temperature sensor to reach the next intermittent temperature adjustment mode normally , where t11 is the temperature value detected by the first temperature sensor when the full temperature adjustment mode is started, p1 is the temperature change power of the temperature change detected by the first temperature sensor in the full temperature adjustment mode, and the temperature adjustment influence coefficient caused by the temperature detected by the second temperature sensor being affected by the external temperature under the current cargo temperature difference , where t31 is the temperature value detected by the third temperature sensor in the full temperature control mode, t21 is the temperature value released by the temperature control system in the full temperature control mode, η is the temperature transfer coefficient of the outer wall of the current tank container, η>0, then under the influence of the current external environment, the time required for the temperature detected by the first temperature sensor to actually reach the next intermittent temperature control mode , after the system detection time is reached, the information of switching the temperature control mode to the intermittent temperature control mode is transmitted to the control terminal.

[0018] According to the above technical solution, in step S223, when the temperature adjustment mode is the intermittent temperature adjustment mode, the adjustment method performed by the temperature adjustment system is specifically:

[0019] The time required for the first temperature sensor's detected temperature to reach the next self-balancing cycle mode normally , where p2 is the temperature change power of the first temperature sensor in the intermittent temperature control mode, and the temperature control influence coefficient of the second temperature sensor caused by the external temperature under the current cargo temperature difference. , where t32 is the temperature value detected by the third temperature sensor in the intermittent temperature control mode, and t22 is the temperature value released by the temperature control system in the full temperature control mode. Under the influence of the current external environment, the time required for the temperature detected by the first temperature sensor to actually reach the next intermittent temperature control mode , where γ is the heat transfer time index inside and outside the tank container. After reaching the time detected by the system, the information of switching the temperature control mode to the self-balancing circulation mode is transmitted to the control terminal.

[0020] According to the above technical solution, in step S223, when the temperature adjustment mode is the self-balancing circulation mode, the adjustment method performed by the temperature adjustment system is specifically:

[0021] The time required for the detected temperature of the first temperature sensor to reach the next temperature adjustment sequence normally , where t13 is the temperature value detected by the first temperature sensor when the temperature control system switches to the self-balancing circulation mode, p3 is the temperature change power of the temperature change detected by the first temperature sensor in the self-balancing circulation mode, and the temperature control influence coefficient of the temperature detected by the second temperature sensor at this time caused by the influence of the external temperature under the temperature difference between the current cargo and the external temperature , where t33 is the temperature value detected by the third temperature sensor in the self-balancing circulation mode, and t23 is the temperature value released by the temperature control system in the full-rate temperature control mode. Under the influence of the current external environment, the time required for the monitored temperature of the first temperature sensor to actually reach the next temperature control balance mode , after the system detection time is reached, the information of switching the temperature control mode to the temperature control balance mode is transmitted to the control terminal.

[0022] According to the above technical solution, the tank container temperature control system is used to execute the tank container temperature control method based on the Internet of Things. The tank container temperature control system includes a container data acquisition module, a temperature control module and a temperature control sequence end prompt module. The container data acquisition module is used to collect data information inside the container loaded with goods; the temperature control module is used to detect the temperature environment inside the container according to the collected information, and adjust the temperature inside the tank container according to the temperature requirements of the loaded goods; the temperature control sequence end prompt module is used to prompt the temperature control system at the end of a single temperature control sequence during the process of the temperature control system adjusting the temperature.

[0023] According to the above technical solution, the container data collection module includes a loading information collection module and a material information collection module. The loading information collection module is used to collect the temperature requirement information of the goods loaded in the container; the material information collection module is used to collect the material information of the container body and obtain the coefficient information of the heat transfer of the container body.

[0024] According to the above technical solution, the temperature control module includes a temperature sensor unit, a heat transfer analysis module and a temperature control mode switching module. The temperature sensor unit is used to detect the temperature value of the corresponding position through temperature sensors arranged at different positions of the tank container; the heat transfer analysis module is used to analyze the specific conditions of the temperature control of the temperature control system in the tank container and the heat transfer of the loaded cargo by the external environment; the temperature control mode switching module is used to switch the temperature control mode in the tank container through the temperature control system.

[0025] According to the above technical solution, the heat transfer analysis module includes a temperature control influence coefficient detection submodule and a stage temperature control time prediction submodule. The temperature control influence coefficient detection submodule is used to detect the influence coefficient value of the heat transfer process between media on the temperature control system; the stage temperature control time prediction submodule is used to predict the most suitable temperature control time of the temperature control system under different temperature control modes.

[0026] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention analyzes the temperature change process in the tank container through the temperature detection results of the temperature control system at different positions of the tank container, controls the tank container to switch the temperature control mode at an appropriate time point based on the analysis results, and transmits the information of the temperature control mode switching back to the control terminal, so as to cover as large a range of temperature requirements of the internal cargo in the tank container under different operating modes under different environments as possible, comprehensively improve the temperature control ability of the tank container temperature control system under different conditions, enable the tank temperature control system to make advance changes to the upcoming sudden change in external temperature, and enable the temperature of the cargo in the container to meet the temperature requirements of the internal cargo under various conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0028] Figure 1 is a flow chart of the tank container temperature adjustment method provided by the present invention;

[0029] Figure 2 It is a schematic diagram of the module composition of the tank container temperature control system provided by the present invention. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1 The present invention provides a technical solution: a tank container temperature control method based on the Internet of Things, comprising the following steps:

[0032] Step S1: The control terminal on the tank container transporting vehicle is connected to the tank container temperature control system, and the temperature control system monitors the temperature environment in the tank container;

[0033] Step S2: The operation modes of the temperature control system include a full temperature control mode, an intermittent temperature control mode, a self-balancing circulation mode and a temperature control balance mode. The temperature control system in a single tank container undergoes a full temperature control mode, an intermittent temperature control mode, a self-balancing circulation mode and a temperature control balance mode, which is a temperature control sequence. The temperature control system adjusts the temperature control mode in the tank container according to the analysis results of the temperature change process in the tank container after detecting that the temperature change in the container reaches a preset standard;

[0034] Step S3: During the process of the temperature control system adjusting the temperature in the container, a prompt is given to the control terminal when the end of a single temperature control sequence is detected.

[0035] The present invention analyzes the temperature change process in the tank container through the temperature detection results of the temperature control system at different positions of the tank container, controls the tank container to switch the temperature control mode at an appropriate time point based on the analysis results, and transmits the information of the temperature control mode switching back to the control terminal, so as to cover as large a range of temperature requirements of the internal goods in the tank container under different operating modes under different environments as possible, comprehensively improve the temperature control ability of the tank container temperature control system under different conditions, and enable the tank temperature control system to make advance changes to the upcoming sudden change in external temperature, so that the temperature of the goods in the container can meet the temperature requirements of the internal goods under various conditions.

[0036] In a preferred embodiment, step S2 comprises:

[0037] Step S21: The control terminal is set on the side of the tank container, and is composed of a control cabinet, a refrigeration and heating unit, a measuring device, a circulation channel installed outside the tank body, and a refrigerant. The measuring device monitors the temperature of the cargo in real time and feeds back the temperature to the control cabinet. The control cabinet makes logical judgments based on the feedback temperature monitoring data, and issues instructions to the refrigeration unit and the heating unit. The refrigeration unit and the heating unit start to execute the corresponding refrigeration and heating instructions. The temperature control logic of the temperature control system has the dual insurance function of temperature control and the ability of high control accuracy;

[0038] Step S22: The measuring device detects the temperature environment in the tank container in real time. If the measuring device detects that the temperature requirement of the goods stored in the tank container is high and the temperature range of the environment outside the current tank container is changed, the ambient temperature outside the tank container is specifically detected to obtain whether the temperature regulation ability of the tank container itself for the goods in the container can maintain the temperature requirement of the goods in the container within the normal standard. If not, the temperature control system in the tank container is started, and the temperature control mode of the current temperature control system is detected through the control terminal in the container. The temperature control system controls the tank container to switch the temperature control mode at an appropriate time point according to the prediction result, and transmits the information of the temperature control mode switching back to the control terminal.

[0039] In this embodiment, step S22 includes:

[0040] Step S221: After receiving the temperature adjustment information, the control terminal detects the temperature value of the surface of the cargo in the tank container through the first temperature sensor, the second temperature sensor, the third temperature sensor and the fourth temperature sensor arranged in the tank container, and obtains the monitoring temperature values ​​corresponding to the current different positions, wherein the first temperature sensor is arranged on the outer contact surface of the random cargo in the tank container, and the temperature detected by the first temperature sensor is t1, the second temperature sensor is arranged on the inner wall of the tank container, and the temperature detected by the second temperature sensor is t2, the third temperature sensor is arranged on the roof of the tank container transport vehicle, and the temperature detected by the third temperature sensor is t3, and the fourth temperature sensor is arranged on the outer wall of the refrigerant device, and the temperature detected by the fourth temperature sensor is t4;

[0041] Step S222: If the temperature difference between the ambient temperature t3 outside the tank container detected by the third temperature sensor and the temperature t2 inside the container detected by the second temperature sensor is higher than the initial temperature difference setting value △T0, the control cabinet issues a command to the refrigeration and heating units to stop working;

[0042] Step S223: When the measuring device detects that the temperature t1 detected by the first temperature sensor is higher than the cargo temperature setting value T, the system starts the full temperature adjustment mode to accelerate the temperature drop; when the refrigerant detection temperature t4 is lower than the difference between the cargo setting temperature T and the temperature difference setting value △T1, the system enters the intermittent temperature adjustment mode to prevent the local temperature of the cargo from being lower than the cargo temperature setting value T; when the first temperature sensor detects the temperature t1 lower than the sum of the cargo setting temperature T and the temperature difference setting value △T2, the system enters the self-balancing circulation mode; when the first temperature sensor detects the temperature t1 lower than the sum of the cargo setting temperature T and 1 / 2 of the temperature difference setting value △T3, the system enters the temperature control balance mode.

[0043] The temperature control system of the tank container is mainly based on the change of the influence coefficient of the external temperature difference on the tank container by the current temperature control system. Since the external medium of the tank container can be affected by the external temperature, it takes a certain amount of time for the temperature to be transmitted to the inside of the tank container. By monitoring the material of the tank container itself, it can be obtained that when there is a temperature difference between the inside and outside of the tank container, the greater the temperature difference, the faster the heat propagates; conversely, the smaller the temperature difference, the slower the heat propagates. In the case of a large temperature difference, the temperature control mode needs to control the corresponding temperature control mode to move closer to the high heat mode in advance to meet the temperature requirements of the goods in the tank container.

[0044] In step S223 of this embodiment, when the temperature adjustment mode is the full temperature adjustment mode, the adjustment method performed by the temperature adjustment system is specifically:

[0045] The time required for the detected temperature of the first temperature sensor to reach the next intermittent temperature adjustment mode normally , where t11 is the temperature value detected by the first temperature sensor when the full temperature adjustment mode is started, p1 is the temperature change power of the temperature change detected by the first temperature sensor in the full temperature adjustment mode, and the temperature adjustment influence coefficient caused by the temperature detected by the second temperature sensor being affected by the external temperature under the current cargo temperature difference , where t31 is the temperature value detected by the third temperature sensor in the full temperature control mode, t21 is the temperature value released by the temperature control system in the full temperature control mode, η is the temperature transfer coefficient of the outer wall of the current tank container, η>0, then under the influence of the current external environment, the time required for the temperature detected by the first temperature sensor to actually reach the next intermittent temperature control mode , after the system detection time is reached, the information of switching the temperature control mode to the intermittent temperature control mode is transmitted to the control terminal.

[0046] In the full temperature control mode, the temperature of the second temperature sensor can approach the temperature of the first temperature sensor more quickly. This technical solution detects the temperature control influence coefficient generated by the sensor receiving the external temperature influence, and based on the temperature transfer coefficient of the tank container, during the switching process of the temperature control mode of the original temperature control system, it accurately switches the temperature control mode, thereby reducing the resource waste of the temperature control system.

[0047] In step S223 of this embodiment, when the temperature adjustment mode is the intermittent temperature adjustment mode, the adjustment method performed by the temperature adjustment system is specifically:

[0048] The time required for the first temperature sensor's detected temperature to reach the next self-balancing cycle mode normally , where p2 is the temperature change power of the first temperature sensor in the intermittent temperature control mode, and the temperature control influence coefficient of the second temperature sensor caused by the external temperature under the current cargo temperature difference. , where t32 is the temperature value detected by the third temperature sensor in the intermittent temperature control mode, and t22 is the temperature value released by the temperature control system in the full temperature control mode. Under the influence of the current external environment, the time required for the temperature detected by the first temperature sensor to actually reach the next intermittent temperature control mode , where γ is the heat transfer time index inside and outside the tank container. After reaching the time detected by the system, the information of switching the temperature control mode to the self-balancing circulation mode is transmitted to the control terminal.

[0049] In the intermittent temperature control mode, since there will be a certain temperature change delay in the refrigerant system in the tank container, the second temperature sensor will detect that the temperature has partially exceeded the detection temperature of the intermittent temperature control mode when the temperature sensor detects that the temperature has reached the preset value. By adding the heat transfer time index inside and outside the tank container on the basis of full temperature control, the possibility of excess time in the current intermittent temperature control mode can be avoided to the greatest extent, greatly improving the mode switching accuracy of the temperature control system.

[0050] In step S223 of this embodiment, when the temperature adjustment mode is the self-balancing circulation mode, the adjustment method performed by the temperature adjustment system is specifically:

[0051] The time required for the detected temperature of the first temperature sensor to reach the next temperature adjustment sequence normally , where t13 is the temperature value detected by the first temperature sensor when the temperature control system switches to the self-balancing circulation mode, p3 is the temperature change power of the temperature change detected by the first temperature sensor in the self-balancing circulation mode, and the temperature control influence coefficient of the temperature detected by the second temperature sensor at this time caused by the influence of the external temperature under the temperature difference between the current cargo and the external temperature , where t33 is the temperature value detected by the third temperature sensor in the self-balancing circulation mode, and t23 is the temperature value released by the temperature control system in the full-rate temperature control mode. Under the influence of the current external environment, the time required for the monitored temperature of the first temperature sensor to actually reach the next temperature control balance mode , after the system detection time is reached, the information of switching the temperature control mode to the temperature control balance mode is transmitted to the control terminal.

[0052] The temperature control system in the self-balancing circulation mode needs to maintain the external intrusion temperature and the cargo temperature within the normal range. After the cargo temperature detected by the first temperature sensor has reached the temperature adjusted by the temperature control system, it is necessary to continue to shield the impact of the external temperature on the cargo. In other words, the temperature control system needs to perform appropriate heating and temperature adjustment based on the temperature difference between the inside and the outside.

[0053] In the self-balancing circulation mode, there is a certain delay in the increase and decrease of the temperature in the tank container. When the temperature sensor detects that the temperature has reached the preset value, it will exceed the predicted time and enter the self-balancing circulation mode later, resulting in unnecessary waste of resources.

[0054] The temperature control system will perform temperature control of different temperature control curves under the preset operating mode of the system. However, under certain circumstances, the ambient temperature will change to a certain extent in a short period of time. Based on this situation, the temperature control system of the tank container itself is difficult to maintain the current operating mode of the temperature control system itself. Therefore, under certain circumstances, the tank container cannot work in the preset working mode, otherwise the temperature control requirements of the goods stored in the tank container will not be met. The operating mode in the tank container needs to be adjusted based on the original operating mode for the external ambient temperature to a preset temperature far away from the external ambient temperature of the tank container, so that the temperature requirement for storing goods in the tank container meets the preset situation, thereby ensuring the storage safety of the goods in the tank container, providing more comprehensive protection for the goods in the tank container, and improving the intelligence level of the temperature control system.

[0055] In a preferred embodiment, the control terminal also includes a monitoring and reverse control system, which is installed on the tank container and can realize real-time monitoring and feedback of the tank container's running trajectory, position, speed, cargo level, pressure, temperature and other data, and can realize terminal push, platform query, and abnormal alarm functions, and can realize reverse parameter setting and control of the tank container's temperature control system through the platform.

[0056] See also Figure 2 The tank container temperature control system is used to execute the tank container temperature control method based on the Internet of Things. The tank container temperature control system includes a container data acquisition module, a temperature control module and a temperature control sequence end prompt module. The container data acquisition module is used to collect data information inside the container loaded with goods; the temperature control module is used to detect the temperature environment inside the container according to the collected information, and adjust the temperature inside the tank container according to the temperature requirements of the loaded goods; the temperature control sequence end prompt module is used to prompt the temperature control system at the end of a single temperature control sequence during the process of the temperature control system adjusting the temperature.

[0057] The container data collection module includes a loading information collection module and a material information collection module. The loading information collection module is used to collect the temperature requirement information of the goods loaded in the container; the material information collection module is used to collect the material information of the container body and obtain the coefficient information of the heat transfer of the container body.

[0058] The temperature control module includes a temperature sensor unit, a heat transfer analysis module and a temperature control mode switching module. The temperature sensor unit is used to detect the temperature value of the corresponding position through temperature sensors arranged at different positions of the tank container; the heat transfer analysis module is used to analyze the specific conditions of the temperature control system in the tank container and the heat transfer of the loaded cargo due to the external environment; the temperature control mode switching module is used to switch the temperature control mode in the tank container through the temperature control system.

[0059] The heat transfer analysis module includes a temperature control influence coefficient detection submodule and a stage temperature control time prediction submodule. The temperature control influence coefficient detection submodule is used to detect the influence coefficient value of the heat transfer process between media on the temperature control system; the stage temperature control time prediction submodule is used to predict the most suitable temperature control time of the temperature control system under different temperature control modes.

[0060] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0061] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tank container temperature control method based on the Internet of Things, characterized in that: The following steps are involved: Step S1: The control terminal on the tank container transporting vehicle is connected to the tank container temperature control system, and the temperature control system monitors the temperature environment in the tank container; Step S2: The operation modes of the temperature control system include a full temperature control mode, an intermittent temperature control mode, a self-balancing circulation mode and a temperature control balance mode. The temperature control system in a single tank container undergoes a full temperature control mode, an intermittent temperature control mode, a self-balancing circulation mode and a temperature control balance mode, which is a temperature control sequence. The temperature control system adjusts the temperature control mode in the tank container according to the analysis results of the temperature change process in the tank container after detecting that the temperature change in the container reaches a preset standard; Step S3: During the process of the temperature control system adjusting the temperature in the container, prompting the control terminal when detecting that a single temperature control sequence has ended; The step S2 comprises: Step S21: The control terminal is arranged on the side of the tank container, and is composed of a control cabinet, a refrigeration and heating unit, a measuring device, a circulation channel installed outside the tank body, and a refrigerant device. The measuring device monitors the temperature of the cargo in real time and feeds back the temperature to the control cabinet. The control cabinet performs logical judgment based on the fed-back temperature monitoring data, and issues instructions to the refrigeration unit and the heating unit. The refrigeration unit and the heating unit start to execute the corresponding refrigeration and heating instructions. Step S22: the measuring device detects the temperature environment in the tank container in real time. If the measuring device detects that the temperature requirement of the goods stored in the tank container is higher than the current temperature range of the environment outside the tank container, the ambient temperature outside the tank container is specifically detected to obtain whether the temperature regulation ability of the tank container itself for the goods in the container can maintain the temperature requirement of the goods in the container within the normal standard. If not, the temperature regulation system in the tank container is started, and the temperature regulation mode of the current temperature regulation system is detected through the control terminal in the container. The temperature regulation system controls the tank container to switch the temperature regulation mode at an appropriate time point according to the prediction result, and transmits the information of the temperature regulation mode switching back to the control terminal; The step S22 comprises: Step S221: After receiving the temperature adjustment information, the control terminal obtains the monitoring temperature values ​​corresponding to different positions through the first temperature sensor, the second temperature sensor, the third temperature sensor and the fourth temperature sensor arranged in the tank container, wherein the first temperature sensor is arranged on the outer contact surface of the random cargo in the tank container, and the temperature detected by the first temperature sensor is t1, the second temperature sensor is arranged on the inner wall of the tank container, and the temperature detected by the second temperature sensor is t2, the third temperature sensor is arranged on the roof of the tank container transport vehicle, and the temperature detected by the third temperature sensor is t3, the fourth temperature sensor is arranged on the outer wall of the refrigerant device, and the temperature detected by the fourth temperature sensor is t4; Step S222: If the temperature difference between the ambient temperature t3 outside the tank container detected by the third temperature sensor and the temperature t2 inside the container detected by the second temperature sensor is higher than the initial temperature difference setting value △T0, the control cabinet issues a command to the refrigeration and heating units to stop working; Step S223: When the measuring device detects that the temperature t1 detected by the first temperature sensor is higher than the cargo temperature setting value T, the system starts the full temperature adjustment mode; when the refrigerant detection temperature t4 is lower than the difference between the cargo setting temperature T and the temperature difference setting value △T1, the system enters the intermittent temperature adjustment mode; when the temperature t1 detected by the first temperature sensor is lower than the sum of the cargo setting temperature T and the temperature difference setting value △T2, the system enters the self-balancing circulation mode; when the temperature t1 detected by the first temperature sensor is lower than the sum of the cargo setting temperature T and 1 / 2 of the temperature difference setting value △T3, the system enters the temperature control balance mode; In step S223, when the temperature adjustment mode is the full temperature adjustment mode, the adjustment method performed by the temperature adjustment system is specifically: The time required for the detected temperature of the first temperature sensor to reach the next intermittent temperature adjustment mode normally , where t11 is the temperature value detected by the first temperature sensor when the full temperature adjustment mode is started, p1 is the temperature change rate of the temperature detected by the first temperature sensor in the full temperature adjustment mode, and the temperature adjustment influence coefficient caused by the temperature detected by the second temperature sensor being affected by the external temperature under the current temperature difference between the goods and the external temperature , where t31 is the temperature value detected by the third temperature sensor in the full temperature control mode, t21 is the temperature value detected by the second temperature sensor in the full temperature control mode, η is the temperature transfer coefficient of the outer wall of the current tank container, η>0, then under the influence of the current external environment, the time required for the temperature detected by the first temperature sensor to actually reach the next intermittent temperature control mode , after the time for system detection is reached, the information of switching the temperature control mode to the intermittent temperature control mode is transmitted to the control terminal; In step S223, when the temperature adjustment mode is the intermittent temperature adjustment mode, the adjustment method performed by the temperature adjustment system is specifically: The time required for the first temperature sensor's detected temperature to reach the next self-balancing cycle mode normally , where p2 is the temperature change rate of the temperature detected by the first temperature sensor in the intermittent temperature control mode, and the temperature control influence coefficient of the temperature detected by the second temperature sensor affected by the external temperature under the current temperature difference between the cargo and the external temperature , where t32 is the temperature value detected by the third temperature sensor in the intermittent temperature adjustment mode, and t22 is the temperature value detected by the second temperature sensor in the intermittent temperature adjustment mode. Under the influence of the current external environment, the time required for the temperature detected by the first temperature sensor to actually reach the next self-balancing cycle mode , where γ is the heat transfer time index inside and outside the tank container. After reaching the time detected by the system, the information of switching the temperature control mode to the self-balancing circulation mode is transmitted to the control terminal; In step S223, when the temperature adjustment mode is the self-balancing circulation mode, the adjustment method performed by the temperature adjustment system is specifically: The time required for the detected temperature of the first temperature sensor to reach the next temperature control balance mode normally , where t13 is the temperature value detected by the first temperature sensor when the temperature control system switches to the self-balancing circulation mode, p3 is the temperature change rate of the temperature detected by the first temperature sensor in the self-balancing circulation mode, and the temperature control influence coefficient of the temperature detected by the second temperature sensor at this time affected by the external temperature under the current temperature difference between the cargo and the external temperature. , where t33 is the temperature value detected by the third temperature sensor in the self-balancing circulation mode, and t23 is the temperature value detected by the second temperature sensor in the self-balancing circulation mode. Under the influence of the current external environment, the time required for the monitored temperature of the first temperature sensor to actually reach the next temperature control balance mode , after the system detection time is reached, the information of switching the temperature control mode to the temperature control balance mode is transmitted to the control terminal.

2. A tank container temperature control system based on the Internet of Things, the tank container temperature control system is used to execute the tank container temperature control method based on the Internet of Things according to claim 1, characterized in that: The tank container temperature control system includes a container data acquisition module, a temperature control module and a temperature control sequence end prompt module. The container data acquisition module is used to collect data information inside the container loaded with goods; the temperature control module is used to detect the temperature environment inside the container according to the collected information, and adjust the temperature inside the tank container according to the temperature requirement of the loaded goods; the temperature control sequence end prompt module is used to prompt the control terminal when a single temperature control sequence ends during the process of the temperature control system adjusting the temperature.

3. The tank container temperature control system based on the Internet of Things according to claim 2 is characterized in that: The container data collection module includes a loading information collection module and a material information collection module. The loading information collection module is used to collect temperature demand information of goods loaded in the container; the material information collection module is used to collect material information of the container body and obtain coefficient information of heat transfer of the container body.

4. The tank container temperature control system based on the Internet of Things according to claim 3 is characterized in that: The temperature control module includes a temperature sensor unit, a heat transfer analysis module and a temperature control mode switching module. The temperature sensor unit is used to detect the temperature value of the corresponding position through temperature sensors arranged at different positions of the tank container; the heat transfer analysis module is used to analyze the specific situation of the external environment affecting the temperature control system in the tank container and the heat transfer of the loaded cargo; the temperature control mode switching module is used to switch the temperature control mode in the tank container through the temperature control system.

5. The tank container temperature control system based on the Internet of Things according to claim 4 is characterized in that: The heat transfer analysis module includes a temperature control influence coefficient detection submodule and a stage temperature control time prediction submodule. The temperature control influence coefficient detection submodule is used to detect the influence coefficient value of the heat transfer process between media on the temperature control system; the stage temperature control time prediction submodule is used to predict the most suitable temperature control time of the temperature control system under different temperature control modes.

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