A safety monitoring method and system for a liquefied gas tank container

Abstract

The application discloses a kind of liquefied gas tank box safety monitoring method and system, the method comprises: obtaining the real-time data of liquefied gas tank box, the real-time data includes: the pressure inside liquefied gas tank box, the temperature inside liquefied gas tank box and liquid phase change rate;Safety evaluation model is set, according to the real-time data, the safety evaluation value is calculated, and compared with preset threshold value, if the safety evaluation value is greater than or equal to the preset threshold value, warning is prompted, and the data of the temperature inside liquefied gas tank box, the pressure inside liquefied gas tank box and the liquid phase change rate appear safety problem are displayed;When the safety evaluation value is greater than or equal to the preset threshold value, corresponding real-time data is uploaded to cloud, and corresponding time is recorded, so as to continuously monitor the liquefied gas tank box.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of safety monitoring of liquefied gas tank containers, and more particularly relates to a safety monitoring method and system for liquefied gas tank containers. BACKGROUND

[0002] LNG tank container multimodal transport (waterway, railway, highway) is the third new LNG logistics mode parallel to pipeline transportation and LNG bulk carrier transportation, and gradually changes from previous pilot to normal operation under the background of carbon emission reduction and carbon peak. The remaining maintenance time of the LNG tank container is a key parameter related to the safe transportation of the LNG tank container. The liquid phase change, internal temperature and pressure of the LNG tank container will gradually increase. When the gas phase pressure increases to the take-off pressure, the safety valve will open to release the accumulated pressure in the LNG tank container, that is, to release part of the LNG vapor, so as to avoid damage to the LNG tank body due to overpressure and cause serious consequences.

[0003] The existing laws and regulations and related technical rules require that the LNG tank container not be allowed to leak flammable gas due to the take-off of the safety valve during the transportation of the ship and when the vehicle carrying the LNG tank container passes through the tunnel and culvert. Therefore, only by accurately predicting the remaining maintenance time of the LNG tank container can the above-mentioned accidents be avoided. The existing industry methods for predicting the remaining maintenance time of the LNG tank container are basically calculated by the ratio between the heat loss required for the LNG tank container to reach the take-off state and the static daily evaporation rate measured by the LNG tank container manufacturer in the LNG tank container type test. The prediction result can only be used for the evaluation of the thermal insulation performance of the LNG tank container, and the prediction accuracy is not sufficient to be applied to the safety control of the actual LNG tank container transportation process, especially the multimodal transport. In addition, only a single parameter can be monitored, resulting in insufficient safety monitoring dimension and low safety. SUMMARY

[0004] To solve the above technical problems, the present application provides a safety monitoring method for a liquefied gas tank container, comprising:

[0005] Obtaining real-time data of the liquefied gas tank container, the real-time data comprising: pressure inside the liquefied gas tank container, temperature inside the liquefied gas tank container and liquid phase change rate;

[0006] Setting a safety evaluation model, calculating a safety evaluation value according to the real-time data, and comparing the safety evaluation value with a preset threshold value, if the safety evaluation value is greater than or equal to the preset threshold value, an alarm is given and the data that appears to have a safety problem among the pressure inside the liquefied gas tank container, the temperature inside the liquefied gas tank container and the liquid phase change rate is displayed;

[0007] When the security evaluation value is greater than or equal to the preset threshold value, the corresponding real-time data is uploaded to the cloud, and the corresponding time is recorded, so as to continuously monitor the liquefied gas tank.

[0008] Further, the security evaluation model is:

[0009] g = a * (1 - e -b*(P-c) ) * (1 - e -d*(T-m) ) * (1 - e -f*N )

[0010] a is the basic value of the security index, b is the influence coefficient of the pressure inside the liquefied gas tank on security, c is the offset of the pressure inside the liquefied gas tank, d is the influence coefficient of the temperature inside the liquefied gas tank on security, m is the offset of the temperature inside the liquefied gas tank, f is the influence coefficient of the liquid phase change on security, P is the pressure inside the liquefied gas tank, T is the temperature inside the liquefied gas tank, N is the liquid phase change rate, and g is the security evaluation value.

[0011] Further, the formula for calculating the liquid phase change rate N is:

[0012]

[0013] Where, V 当前 is the current liquid volume, V 上一时刻 is the liquid volume at the last time, and T 时间间隔 is the time interval.

[0014] Further, it also includes:

[0015] The basic value a of the security index indicates the security level of the liquefied gas tank when the pressure inside the liquefied gas tank, the temperature inside the liquefied gas tank, and the liquid phase change rate are all zero;

[0016] The influence coefficient b of the pressure inside the liquefied gas tank on security indicates the speed at which the security index decreases when the pressure inside the liquefied gas tank increases by one unit;

[0017] The offset c of the pressure inside the liquefied gas tank indicates where the influence of the pressure inside the liquefied gas tank on security begins to change;

[0018] The influence coefficient d of the temperature inside the liquefied gas tank on security indicates the speed at which the security index decreases when the temperature inside the liquefied gas tank increases by one unit;

[0019] The offset m of the temperature inside the liquefied gas tank indicates where the influence of the temperature inside the liquefied gas tank on security begins to change;

[0020] The influence coefficient f of liquid phase change on safety represents the speed of safety index decrease when the unit liquid phase change rate increases.

[0021] Further, the formulas of the basic value a of safety index, the influence coefficient b of pressure in liquefied gas tank box on safety, the offset amount c of pressure in liquefied gas tank box, the influence coefficient d of temperature in liquefied gas tank box on safety, the offset amount m of temperature in liquefied gas tank box and the influence coefficient f of liquid phase change on safety are as follows:

[0022]

[0023]

[0024]

[0025]

[0026]

[0027]

[0028] Wherein, P 临界 is the critical pressure in liquefied gas tank box, V is the liquid volume of gas, V 临界 is the critical volume of gas, P max is the maximum pressure in liquefied gas tank box during transportation, P min is the minimum pressure in liquefied gas tank box during transportation, P avg is the average pressure in liquefied gas tank box during transportation, T 临界 is the critical temperature in liquefied gas tank box during transportation, T max is the maximum temperature in liquefied gas tank box during transportation, T min is the minimum temperature in liquefied gas tank box during transportation, T avg is the average temperature in liquefied gas tank box during transportation, dp is the change amount of pressure in liquefied gas tank box, dt is the change amount of time, dv is the change amount of liquid volume of gas.

[0029] The application further provides a safety monitoring system of liquefied gas tank box, comprising:

[0030] The data acquisition module is used for acquiring real-time data of the liquefied gas tank box, wherein the real-time data comprises the pressure in the liquefied gas tank box, the temperature in the liquefied gas tank box and the liquid phase change rate.

[0031] The computing module is configured to set a safety evaluation model, calculate a safety evaluation value according to the real-time data, and compare the safety evaluation value with a preset threshold value, if the safety evaluation value is greater than or equal to the preset threshold value, an alarm is given, and the data of the safety problem in the pressure inside the liquefied gas tank, the temperature inside the liquefied gas tank and the liquid phase change rate are displayed;

[0032] The monitoring module is configured to upload the corresponding real-time data to the cloud when the safety evaluation value is greater than or equal to the preset threshold value, and record the corresponding time, so as to continuously monitor the liquefied gas tank.

[0033] Further, the safety evaluation model is:

[0034] g=a*(1-e -b*(P-c) )*(1-e -d*(T-m) )*(1-e -f*N )

[0035] a is a basic value of a safety index, b is an influence coefficient of the pressure inside the liquefied gas tank on safety, c is a pressure offset of the liquefied gas tank, d is an influence coefficient of the temperature inside the liquefied gas tank on safety, m is a temperature offset of the liquefied gas tank, f is an influence coefficient of the liquid phase change on safety, P is the pressure inside the liquefied gas tank, T is the temperature inside the liquefied gas tank, N is the liquid phase change rate, and g is the safety evaluation value.

[0036] Further, the formula for calculating the liquid phase change rate N is:

[0037]

[0038] Wherein, V 当前 is the current liquid volume, V 上一时刻 is the liquid volume at the last time, and T 时间间隔 is the time interval.

[0039] Further, it further comprises:

[0040] The basic value a of the safety index represents the safety level of the liquefied gas tank when the pressure inside the liquefied gas tank, the temperature inside the liquefied gas tank and the liquid phase change rate are all zero;

[0041] The influence coefficient b of the pressure inside the liquefied gas tank on safety represents the speed of the safety index decreasing when the unit pressure inside the liquefied gas tank increases;

[0042] The pressure offset c of the liquefied gas tank represents the change of the influence of the pressure inside the liquefied gas tank on safety.

[0043] a coefficient d of influence of the temperature inside the liquefied gas tank on safety, indicating a rate of decrease in the safety index per unit increase in the temperature inside the liquefied gas tank;

[0044] a shift m of the temperature inside the liquefied gas tank, indicating a point at which the influence of the temperature inside the liquefied gas tank on safety starts to change;

[0045] a coefficient f of influence of the liquid phase change on safety, indicating a rate of decrease in the safety index per unit increase in the liquid phase change rate.

[0046] Further, the formula for calculating the base value a of the safety index, the coefficient b of influence of the pressure inside the liquefied gas tank on safety, the shift c of the pressure inside the liquefied gas tank, the coefficient d of influence of the temperature inside the liquefied gas tank on safety, the shift m of the temperature inside the liquefied gas tank, and the coefficient f of influence of the liquid phase change on safety is:

[0047]

[0048]

[0049]

[0050]

[0051]

[0052]

[0053] where P 临界 is the critical pressure inside the liquefied gas tank, V is the liquid volume of the gas, V 临界 is the critical volume of the gas, P max is the maximum pressure inside the liquefied gas tank during transportation, P min is the minimum pressure inside the liquefied gas tank during transportation, P avg is the average pressure inside the liquefied gas tank during transportation, T 临界 is the critical temperature inside the liquefied gas tank during transportation, T max is the maximum temperature inside the liquefied gas tank during transportation, T min is the minimum temperature inside the liquefied gas tank during transportation, T avg is the average temperature inside the liquefied gas tank during transportation, dp is the change in the pressure inside the liquefied gas tank, dt is the change in time, and dv is the change in the liquid volume of the gas.

[0054] Overall, compared with the prior art, the above technical solutions conceived by the present application have the following beneficial effects:

[0055] The safety evaluation model is provided, the safety evaluation value is calculated according to the real-time data, and the safety evaluation value is compared with the preset threshold value, if the safety evaluation value is greater than or equal to the preset threshold value, an alarm is given, and the data of the liquefied gas tank box inside the pressure, the liquefied gas tank box inside the temperature and the liquid phase change rate appear safety problems, can be evaluated according to a plurality of parameters Comprehensive evaluation of liquefied gas tank box, and timely alarm and display of over-standard parameters, greatly improve the accuracy of safety monitoring. BRIEF DESCRIPTION OF DRAWINGS

[0056] Figure 1 is a flow chart of the method of embodiment 1 of the present application;

[0057] Figure 2 is a structure diagram of the system of embodiment 2 of the present application. DETAILED DESCRIPTION

[0058] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the drawings and specific embodiments of the specification.

[0059] The method provided by the present application can be implemented in a terminal environment, which can include one or more of the following components: a processor, a storage medium and a display screen. Among them, the storage medium stores at least one instruction, the instruction is loaded and executed by the processor to realize the method described in the following embodiment.

[0060] The processor can include one or more processing cores. The processor connects various parts in the entire terminal through various interfaces and lines, executes various functions of the terminal and processes data by running or executing instructions, programs, code sets or instruction sets stored in the storage medium, and calling data stored in the storage medium.

[0061] The storage medium can include random access memory (RAM) and read-only memory (ROM). The storage medium can be used to store instructions, programs, codes, code sets or instructions.

[0062] The display screen is used to display the user interface of each application program.

[0063] In addition, those skilled in the art can understand that the structure of the terminal described above does not constitute a limitation on the terminal, and the terminal can include more or fewer components, or combine certain components, or different component arrangements. For example, the terminal also includes radio frequency circuitry, an input unit, a sensor, audio circuitry, a power supply, and the like, which are not described here.

[0064] Embodiment 1

[0065] As shown in the figure, the embodiment of the application provides a safety monitoring method of a liquefied gas tank, comprising: Figure 1

[0066] Step 101, acquiring real-time data of the liquefied gas tank, the real-time data including: pressure inside the liquefied gas tank, temperature inside the liquefied gas tank, and liquid phase change rate;

[0067] Step 102, setting a safety evaluation model, calculating a safety evaluation value according to the real-time data, and comparing it with a preset threshold value, if the safety evaluation value is greater than or equal to the preset threshold value, an alarm is given and the data that has a safety problem among the pressure inside the liquefied gas tank, the temperature inside the liquefied gas tank, and the liquid phase change rate is displayed;

[0068] Specifically, the safety evaluation model is:

[0069] g=a*(1-c -b*(P-c) )*(1-e -d*(T-m) )*(1-e -f*N )

[0070] a is the basic value of the safety index, b is the influence coefficient of the pressure inside the liquefied gas tank on safety, c is the offset of the pressure inside the liquefied gas tank, d is the influence coefficient of the temperature inside the liquefied gas tank on safety, m is the offset of the temperature inside the liquefied gas tank, f is the influence coefficient of the liquid phase change on safety, P is the pressure inside the liquefied gas tank, T is the temperature inside the liquefied gas tank, N is the liquid phase change rate, and g is the safety evaluation value.

[0071] Specifically, the formula for calculating the liquid phase change rate N is:

[0072]

[0073] Where, V 当前 is the current liquid volume, V 上一时刻 is the liquid volume at the last time, and T 时间间隔 is the time interval.

[0074] Specifically, it also includes:

[0075] ​The base value a of the safety index represents the safety level of the liquefied gas tank when the pressure inside the liquefied gas tank, the temperature inside the liquefied gas tank and the liquid phase change rate are all zero;

[0076] The influence coefficient b of the pressure inside the liquefied gas tank on safety represents the speed of the safety index decreasing when the pressure inside the liquefied gas tank increases by unit;

[0077] The offset c of the pressure inside the liquefied gas tank represents the point at which the influence of the pressure inside the liquefied gas tank on safety starts to change;

[0078] The influence coefficient d of the temperature inside the liquefied gas tank on safety represents the speed of the safety index decreasing when the temperature inside the liquefied gas tank increases by unit;

[0079] The offset m of the temperature inside the liquefied gas tank represents the point at which the influence of the temperature inside the liquefied gas tank on safety starts to change;

[0080] The influence coefficient f of the liquid phase change on safety represents the speed of the safety index decreasing when the liquid phase change rate increases by unit.

[0081] Specifically, the formula for calculating the base value a of the safety index, the influence coefficient b of the pressure inside the liquefied gas tank on safety, the offset c of the pressure inside the liquefied gas tank, the influence coefficient d of the temperature inside the liquefied gas tank on safety, the offset m of the temperature inside the liquefied gas tank and the influence coefficient f of the liquid phase change on safety is:

[0082]

[0083]

[0084]

[0085]

[0086]

[0087]

[0088] wherein P 临界 is the critical pressure inside the liquefied gas tank, V is the liquid volume of the gas, V 临界 is the critical volume of the gas, P max is the maximum pressure inside the liquefied gas tank during transportation, P min is the minimum pressure inside the liquefied gas tank during transportation, P avg is the average pressure inside the liquefied gas tank during transportation, and T临界 Tc is a critical temperature inside the liquefied gas tank during transportation, T max Tmax is a maximum temperature inside the liquefied gas tank during transportation, T min Tmin is a minimum temperature inside the liquefied gas tank during transportation, T avg Tavg is an average temperature inside the liquefied gas tank during transportation, dp is a change amount of pressure inside the liquefied gas tank, dt is a change amount of time, and dv is a change amount of liquid volume of the gas.

[0089] In step 103, when the safety evaluation value is greater than or equal to the preset threshold value, the corresponding real-time data is uploaded to the cloud, and the corresponding time is recorded, so as to continuously monitor the liquefied gas tank.

[0090] Embodiment 2

[0091] As shown in Figure 2 The embodiment of the present application also provides a safety monitoring method of a liquefied gas tank, which comprises the following steps:

[0092] A data acquisition module is configured to acquire real-time data of the liquefied gas tank, wherein the real-time data comprises pressure inside the liquefied gas tank, temperature inside the liquefied gas tank, and liquid phase change rate.

[0093] A calculation module is configured to set a safety evaluation model, calculate a safety evaluation value according to the real-time data, and compare the safety evaluation value with a preset threshold value, wherein if the safety evaluation value is greater than or equal to the preset threshold value, an alarm is given, and data that has a safety problem in the pressure inside the liquefied gas tank, the temperature inside the liquefied gas tank, and the liquid phase change rate is displayed.

[0094] Specifically, the safety evaluation model is as follows:

[0095] g=a*(1-e -b*(P-c) )*(1-e -d*(T-m) )*(1-e -f*N )

[0096] a is a basic value of a safety index, b is an influence coefficient of the pressure inside the liquefied gas tank on safety, c is a pressure offset of the liquefied gas tank, d is an influence coefficient of the temperature inside the liquefied gas tank on safety, m is a temperature offset of the liquefied gas tank, f is an influence coefficient of liquid phase change on safety, P is the pressure inside the liquefied gas tank, T is the temperature inside the liquefied gas tank, N is the liquid phase change rate, and g is the safety evaluation value.

[0097] Specifically, the formula for calculating the liquid phase change rate N is as follows:

[0098]

[0099] wherein V 当前 is the current liquid volume, V 上一时刻 is the liquid volume at the previous time, T 时间间隔 is the time interval.

[0100] In particular, the method further comprises:

[0101] a base value a of the safety index, representing a safety level of the liquefied gas tank when the pressure inside the liquefied gas tank, the temperature inside the liquefied gas tank and the liquid phase change rate are all zero;

[0102] a pressure inside the liquefied gas tank impact coefficient b on safety, representing a speed of decline of the safety index when the unit pressure inside the liquefied gas tank is increased;

[0103] a pressure inside the liquefied gas tank offset c, representing where the impact of the pressure inside the liquefied gas tank on safety starts to change;

[0104] a temperature inside the liquefied gas tank impact coefficient d on safety, representing a speed of decline of the safety index when the unit temperature inside the liquefied gas tank is increased;

[0105] a temperature inside the liquefied gas tank offset m, representing where the impact of the temperature inside the liquefied gas tank on safety starts to change;

[0106] a liquid phase change impact coefficient f on safety, representing a speed of decline of the safety index when the unit liquid phase change rate is increased.

[0107] In particular, the formula for calculating the base value a of the safety index, the pressure inside the liquefied gas tank impact coefficient b on safety, the pressure inside the liquefied gas tank offset c, the temperature inside the liquefied gas tank impact coefficient d on safety, the temperature inside the liquefied gas tank offset m and the liquid phase change impact coefficient f on safety is:

[0108]

[0109]

[0110]

[0111]

[0112]

[0113]

[0114] wherein, P 临界 is the critical pressure inside the liquefied gas tank, V is the liquid volume of the gas, V 临界 is the critical volume of the gas, P max is the maximum pressure inside the liquefied gas tank during transportation, P min is the minimum pressure inside the liquefied gas tank during transportation, P avg is the average pressure inside the liquefied gas tank during transportation, T 临界 is the critical temperature inside the liquefied gas tank during transportation, T max is the maximum temperature inside the liquefied gas tank during transportation, T min is the minimum temperature inside the liquefied gas tank during transportation, T avg is the average temperature inside the liquefied gas tank during transportation, dp is the change of the pressure inside the liquefied gas tank, dt is the change of time, and dv is the change of the liquid volume of the gas.

[0115] The monitoring module is configured to upload the real-time data corresponding to the safety evaluation value greater than or equal to the preset threshold to the cloud and record the corresponding time, so as to continuously monitor the liquefied gas tank.

[0116] Embodiment 3

[0117] The embodiment of the present application also provides a storage medium storing a plurality of instructions for implementing the safety monitoring method of the liquefied gas tank.

[0118] Optionally, in the embodiment, the storage medium can be located in any one of computer terminals in a computer terminal group in a computer network or in any one of mobile terminals in a mobile terminal group.

[0119] Optionally, in the embodiment, the storage medium is configured to store program codes for performing the following steps: step 101, acquiring real-time data of the liquefied gas tank, wherein the real-time data comprises the pressure inside the liquefied gas tank, the temperature inside the liquefied gas tank and the liquid phase change rate;

[0120] Step 102, setting a safety evaluation model, calculating a safety evaluation value according to the real-time data, and comparing the safety evaluation value with a preset threshold, if the safety evaluation value is greater than or equal to the preset threshold, alarming and reminding, and displaying the data of the safety problem in the pressure inside the liquefied gas tank, the temperature inside the liquefied gas tank and the liquid phase change rate;

[0121] Specifically, the safety evaluation model is:

[0122] g = a * (1 - e -b*(P-c) ) * (1 - e -d*(T-m) ) * (1 - e -f*N )

[0123] a is a basic value of a safety index, b is a pressure inside a liquefied gas tank box affecting a safety coefficient, c is a pressure inside the liquefied gas tank box offset, d is a temperature inside the liquefied gas tank box affecting a safety coefficient, m is a temperature inside the liquefied gas tank box offset, f is a liquid phase change affecting a safety coefficient, P is a pressure inside the liquefied gas tank box, T is a temperature inside the liquefied gas tank box, N is a liquid phase change rate, and g is a safety evaluation value.

[0124] Specifically, the formula for calculating the liquid phase change rate N is:

[0125]

[0126] where V 当前 is a current liquid volume, V 上一时刻 is a previous liquid volume, T 时间间隔 is a time interval.

[0127] Specifically, it also includes:

[0128] The basic value a of the safety index indicates the safety level of the liquefied gas tank box when the pressure inside the liquefied gas tank box, the temperature inside the liquefied gas tank box, and the liquid phase change rate are all zero.

[0129] The pressure inside the liquefied gas tank box affecting the safety coefficient b indicates the speed at which the safety index decreases when the pressure inside the liquefied gas tank box increases by one unit.

[0130] The pressure inside the liquefied gas tank box offset c indicates where the influence of the pressure inside the liquefied gas tank box on safety begins to change.

[0131] The temperature inside the liquefied gas tank box affecting the safety coefficient d indicates the speed at which the safety index decreases when the temperature inside the liquefied gas tank box increases by one unit.

[0132] The temperature inside the liquefied gas tank box offset m indicates where the influence of the temperature inside the liquefied gas tank box on safety begins to change.

[0133] The liquid phase change affecting the safety coefficient f indicates the speed at which the safety index decreases when the liquid phase change rate increases by one unit.

[0134] Specifically, the formulas of the base value a of the safety index, the influence coefficient b of the pressure inside the liquefied gas tank container on safety, the offset value c of the pressure inside the liquefied gas tank container, the influence coefficient d of the temperature inside the liquefied gas tank container on safety, the offset value m of the temperature inside the liquefied gas tank container, and the influence coefficient f of the liquid phase change on safety are as follows:

[0135]

[0136]

[0137]

[0138]

[0139]

[0140]

[0141] wherein, P 临界 is the critical pressure inside the liquefied gas tank container, V is the liquid volume of the gas, V 临界 is the critical volume of the gas, P max is the maximum pressure inside the liquefied gas tank container during transportation, P min is the minimum pressure inside the liquefied gas tank container during transportation, P avg is the average pressure inside the liquefied gas tank container during transportation, T 临界 is the critical temperature inside the liquefied gas tank container during transportation, T max is the maximum temperature inside the liquefied gas tank container during transportation, T min is the minimum temperature inside the liquefied gas tank container during transportation, T avg is the average temperature inside the liquefied gas tank container during transportation, dp is the change amount of the pressure inside the liquefied gas tank container, dt is the change amount of time, and dv is the change amount of the liquid volume of the gas.

[0142] In step 103, when the safety evaluation value is greater than or equal to the preset threshold value, the corresponding real-time data is uploaded to the cloud, and the corresponding time is recorded, so as to continuously monitor the liquefied gas tank container.

[0143] Embodiment 4

[0144] The embodiment of the present application also provides an electronic device, which comprises a processor and a storage medium connected with the processor, and the storage medium stores a plurality of instructions which can be loaded and executed by the processor so that the processor can execute the safety monitoring method of the liquefied gas tank container.

[0145] Specifically, the electronic device of the embodiment can be a computer terminal, which can include one or more processors and a storage medium.

[0146] The storage medium can be used to store software programs and modules, such as a safety monitoring method for a liquefied gas tank container according to the embodiment of the present application, corresponding program instructions / modules, and the processor executes various functional applications and data processing by running the software programs and modules stored in the storage medium, that is, implements the safety monitoring method for the liquefied gas tank container. The storage medium can include a high-speed random storage medium, and can also include a non-volatile storage medium, such as one or more magnetic storage systems, flash memories, or other non-volatile solid-state storage media. In some examples, the storage medium can further include storage media remotely arranged with respect to the processor, which can be connected to the terminal through a network. Examples of the above network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof.

[0147] The processor can call the information and application programs stored in the storage medium through the transmission system to perform the following steps: step 101, acquiring real-time data of the liquefied gas tank container, the real-time data including pressure inside the liquefied gas tank container, temperature inside the liquefied gas tank container, and liquid phase change rate;

[0148] Step 102, setting a safety evaluation model, calculating a safety evaluation value according to the real-time data, and comparing the safety evaluation value with a preset threshold value, if the safety evaluation value is greater than or equal to the preset threshold value, an alarm is prompted, and data with safety problems in the pressure inside the liquefied gas tank container, the temperature inside the liquefied gas tank container, and the liquid phase change rate are displayed;

[0149] Specifically, the safety evaluation model is:

[0150] g = a * (1 - e -b*(P-c) ) * (1 - e -d*(T-m) ) * (1 - e -f*N )

[0151] a is a basic value of a safety index, b is an influence coefficient of the pressure inside the liquefied gas tank container on safety, c is a deviation of the pressure inside the liquefied gas tank container, d is an influence coefficient of the temperature inside the liquefied gas tank container on safety, m is a deviation of the temperature inside the liquefied gas tank container, f is an influence coefficient of the liquid phase change on safety, P is the pressure inside the liquefied gas tank container, T is the temperature inside the liquefied gas tank container, N is the liquid phase change rate, and g is the safety evaluation value.

[0152] Specifically, the formula for calculating the liquid phase change rate N is:

[0153]

[0154] wherein V 当前 is the current liquid volume, V 上一时刻 is the liquid volume at the previous time, T 时间间隔 is the time interval.

[0155] In particular, the method further comprises:

[0156] a base value a of the safety index, representing a safety level of the liquefied gas tank when the pressure inside the liquefied gas tank, the temperature inside the liquefied gas tank and the liquid phase change rate are all zero;

[0157] a pressure inside the liquefied gas tank impact coefficient b on safety, representing a speed of decline of the safety index when the unit pressure inside the liquefied gas tank is increased;

[0158] a pressure inside the liquefied gas tank offset c, representing where the impact of the pressure inside the liquefied gas tank on safety starts to change;

[0159] a temperature inside the liquefied gas tank impact coefficient d on safety, representing a speed of decline of the safety index when the unit temperature inside the liquefied gas tank is increased;

[0160] a temperature inside the liquefied gas tank offset m, representing where the impact of the temperature inside the liquefied gas tank on safety starts to change;

[0161] a liquid phase change impact coefficient f on safety, representing a speed of decline of the safety index when the unit liquid phase change rate is increased.

[0162] In particular, the formula for calculating the base value a of the safety index, the pressure inside the liquefied gas tank impact coefficient b on safety, the pressure inside the liquefied gas tank offset c, the temperature inside the liquefied gas tank impact coefficient d on safety, the temperature inside the liquefied gas tank offset m and the liquid phase change impact coefficient f on safety is:

[0163]

[0164]

[0165]

[0166]

[0167]

[0168]

[0169] wherein, P 临界 is the critical pressure inside the liquefied gas tank, V is the liquid volume of the gas, V 临界 is the critical volume of the gas, P max is the maximum pressure inside the liquefied gas tank during transportation, P min is the minimum pressure inside the liquefied gas tank during transportation, P avg is the average pressure inside the liquefied gas tank during transportation, T 临界 is the critical temperature inside the liquefied gas tank during transportation, T max is the maximum temperature inside the liquefied gas tank during transportation, T min is the minimum temperature inside the liquefied gas tank during transportation, T avg is the average temperature inside the liquefied gas tank during transportation, dp is the change of the pressure inside the liquefied gas tank, dt is the change of time, and dv is the change of the liquid volume of the gas.

[0170] Step 103, when the security evaluation value is greater than or equal to the preset threshold value, the corresponding real-time data is uploaded to the cloud, and the corresponding time is recorded, so as to continuously monitor the liquefied gas tank.

[0171] The above-mentioned embodiment numbers of the present application are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0172] In the above-mentioned embodiments of the present application, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0173] In the several embodiments of the present application, it should be understood that the disclosed technology can be implemented in other ways. Of course, the above-mentioned system embodiments are only schematic, for example, the division of units is only a logical function division, and there can be another division way in actual implementation, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, unit or module, and can be electrical or other forms.

[0174] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. According to actual needs, part or all of the units can be selected to achieve the purpose of the embodiment scheme.

[0175] In addition, each function unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software function unit.

[0176] When the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application, essentially or in the form of a contribution to the prior art, or all or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present application. The foregoing storage medium includes various media that can store program codes, such as a U disk, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk, etc.

[0177] Obviously, the above embodiments are merely examples for clear illustration, and are not intended to limit the embodiments. Based on the above description, other different forms of changes or modifications can be made by those skilled in the art. Here, it is not necessary or possible to enumerate all the embodiments. The obvious changes or modifications derived therefrom are still within the protection scope of the present application.

Claims

1. A safety monitoring method for liquefied gas tank containers, characterized in that, include: Acquire real-time data of the liquefied gas tank, including: the pressure inside the liquefied gas tank, the temperature inside the liquefied gas tank, and the rate of liquid phase change; A safety evaluation model is set up to calculate a safety evaluation value based on the real-time data and compare it with a preset threshold. If the safety evaluation value is greater than or equal to the preset threshold, an alarm is triggered, and data on the pressure inside the liquefied gas tank, the temperature inside the liquefied gas tank, and the liquid phase change rate are displayed to indicate safety issues. The security evaluation model is as follows: ， a is the base value of the safety index, b is the influence coefficient of the pressure inside the liquefied gas tank on safety, c is the deviation of the pressure inside the liquefied gas tank, d is the influence coefficient of the temperature inside the liquefied gas tank on safety, m is the deviation of the temperature inside the liquefied gas tank, f is the influence coefficient of liquid phase change on safety, P is the pressure inside the liquefied gas tank, T is the temperature inside the liquefied gas tank, N is the liquid phase change rate, and g is the safety evaluation value. The base value 'a' of the safety index represents the safety level of the liquefied gas tank when the pressure, temperature, and liquid phase change rate inside the liquefied gas tank are all zero. The safety factor b, which represents the rate at which the safety index decreases when the internal pressure of a liquefied gas tank increases by a unit of pressure, indicates the impact of the internal pressure of the liquefied gas tank on safety. The pressure offset 'c' inside the liquefied gas tank indicates where the impact of the pressure inside the liquefied gas tank on safety begins to change. The safety impact coefficient d of the temperature inside the liquefied gas tank container represents the rate at which the safety index decreases when the temperature inside the liquefied gas tank container increases by a unit. The temperature offset m inside the liquefied gas tank indicates where the impact of the temperature inside the liquefied gas tank on safety begins to change; The coefficient f, which measures the impact of liquid phase change on safety, represents the rate at which the safety index decreases as the unit liquid phase change rate increases. The formulas for calculating the basic values ​​of the safety index, including: a) the influence coefficient of the pressure inside the liquefied gas tank on safety; b) the pressure deviation inside the liquefied gas tank; c) the influence coefficient of the temperature inside the liquefied gas tank on safety; d) the temperature deviation m inside the liquefied gas tank and the influence coefficient f of the liquid phase change on safety, are as follows: ， ， ， ， ， ， in, This refers to the critical pressure inside the liquefied gas tank. Let be the liquid volume of the gas. Let be the critical volume of the gas. This represents the maximum pressure inside the liquefied gas tank during transportation. This refers to the minimum pressure inside the liquefied gas tank during transportation. This refers to the average pressure inside the liquefied gas tank during transportation. This refers to the critical temperature inside the liquefied gas tank during transportation. This refers to the maximum temperature inside the liquefied gas tank container during transportation. This refers to the minimum temperature inside the liquefied gas tank container during transportation. This refers to the average temperature inside the liquefied gas tank during transportation. This represents the change in pressure inside the liquefied gas tank. The change over time This represents the change in the liquid volume of a gas. When the safety evaluation value is greater than or equal to the preset threshold, the corresponding real-time data is uploaded to the cloud and the corresponding time is recorded so as to continuously monitor the liquefied gas tank.

2. The safety monitoring method for a liquefied gas tank as described in claim 1, characterized in that, The formula for calculating the liquid phase change rate N is: ， in, The current liquid volume, The volume of the liquid at the previous moment. For time intervals.

3. A safety monitoring system for liquefied gas tank containers, characterized in that, include: The data acquisition module is used to acquire real-time data of the liquefied gas tank, including: the pressure inside the liquefied gas tank, the temperature inside the liquefied gas tank, and the liquid phase change rate. The calculation module is used to set up a safety evaluation model, calculate a safety evaluation value based on the real-time data, and compare it with a preset threshold. If the safety evaluation value is greater than or equal to the preset threshold, an alarm is triggered, and data on the pressure inside the liquefied gas tank, the temperature inside the liquefied gas tank, and the liquid phase change rate are displayed to indicate safety issues. The security evaluation model is as follows: ， a is the base value of the safety index, b is the influence coefficient of the pressure inside the liquefied gas tank on safety, c is the deviation of the pressure inside the liquefied gas tank, d is the influence coefficient of the temperature inside the liquefied gas tank on safety, m is the deviation of the temperature inside the liquefied gas tank, f is the influence coefficient of liquid phase change on safety, P is the pressure inside the liquefied gas tank, T is the temperature inside the liquefied gas tank, N is the liquid phase change rate, and g is the safety evaluation value. The base value 'a' of the safety index represents the safety level of the liquefied gas tank when the pressure, temperature, and liquid phase change rate inside the liquefied gas tank are all zero. The safety factor b, which represents the rate at which the safety index decreases when the internal pressure of a liquefied gas tank increases by a unit of pressure, indicates the impact of the internal pressure of the liquefied gas tank on safety. The pressure offset 'c' inside the liquefied gas tank indicates where the impact of the pressure inside the liquefied gas tank on safety begins to change. The safety impact coefficient d of the temperature inside the liquefied gas tank container represents the rate at which the safety index decreases when the temperature inside the liquefied gas tank container increases by a unit. The temperature offset m inside the liquefied gas tank indicates where the impact of the temperature inside the liquefied gas tank on safety begins to change; The coefficient f, which measures the impact of liquid phase change on safety, represents the rate at which the safety index decreases as the unit liquid phase change rate increases. The formulas for calculating the basic values ​​of the safety index, including: a) the influence coefficient of the pressure inside the liquefied gas tank on safety; b) the pressure deviation inside the liquefied gas tank; c) the influence coefficient of the temperature inside the liquefied gas tank on safety; d) the temperature deviation m inside the liquefied gas tank and the influence coefficient f of the liquid phase change on safety, are as follows: ， ， ， ， ， ， in, This refers to the critical pressure inside the liquefied gas tank. Let be the liquid volume of the gas. Let be the critical volume of the gas. This represents the maximum pressure inside the liquefied gas tank during transportation. This refers to the minimum pressure inside the liquefied gas tank during transportation. This refers to the average pressure inside the liquefied gas tank during transportation. This refers to the critical temperature inside the liquefied gas tank during transportation. This refers to the maximum temperature inside the liquefied gas tank container during transportation. This refers to the minimum temperature inside the liquefied gas tank container during transportation. This refers to the average temperature inside the liquefied gas tank during transportation. This represents the change in pressure inside the liquefied gas tank. The change over time This represents the change in the liquid volume of a gas. The monitoring module is used to upload the corresponding real-time data to the cloud and record the corresponding time when the safety evaluation value is greater than or equal to the preset threshold, so as to continuously monitor the liquefied gas tank.

4. The safety monitoring system for a liquefied gas tank container as described in claim 3, characterized in that, The formula for calculating the liquid phase change rate N is: ， in, The current liquid volume, The volume of the liquid at the previous moment. For time intervals.

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