CN114021379A - Method for estimating storage life of water storage film-forming fire extinguishing agent of tank and providing extreme temperature early warning by multiple temperature sources - Google Patents
Method for estimating storage life of water storage film-forming fire extinguishing agent of tank and providing extreme temperature early warning by multiple temperature sources Download PDFInfo
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Abstract
The invention discloses a method for estimating the storage life of a water storage film-forming fire extinguishing agent of a tank and providing extreme temperature early warning by multiple temperature sources, which is realized by a system with a three-layer structure, wherein a microcontroller unit (MCU) at the bottom layer is responsible for collecting temperature data, a computer at the middle layer is responsible for processing and forwarding the data, and a server at the top layer is responsible for carrying out communication butt joint, prediction and training model with the outside; comprehensively utilizes the temperature sensor in the storage tank, the temperature sensor outside the storage tank, local historical temperature data and weather forecast data to evaluate the service life consumption condition of the water storage film-forming fire extinguishing agent in the tank at present and in a future period of time, and provides service life exhaustion and extreme temperature early warning.
Description
Technical Field
The invention relates to the field of solution thermal aging estimation, in particular to a method for estimating the storage life of a water storage film-forming fire extinguishing agent in a tank and providing extreme temperature early warning by multiple temperature sources, and a method for estimating the life of a solution product by monitoring temperature change.
Background
Aqueous film-forming fire extinguishing agent stock solution is a dispersion used to extinguish oil fires and is typically stored in stainless steel storage tanks for later use. The effective storage life is mainly related to the temperature under the condition of ensuring that the material is not leaked, polluted and unstably layered. Yuan bin (Yuan bin, Xiejian, Han Yong, etc.. novel method for determining the storage life of a water-forming fire extinguishing agent [ J ]. fire science and technology, 2008, 27(5): 3) and the like confirm that, under general storage conditions, the relationship between the life and the temperature of the water-forming fire extinguishing agent conforms to the rule of general chemical reactions, i.e., the life consumption rate increases exponentially with the storage temperature, and if the total life of the water-forming fire extinguishing agent is L, then L = A exp (-BT) exists, wherein A, B is a coefficient determined experimentally, and T is the storage temperature.
For an online monitoring system for monitoring the storage state of the water film-forming fire extinguishing agent in real time and predicting the service life of the water film-forming fire extinguishing agent, the accurate estimation of the temperature of the water film-forming fire extinguishing agent in a tank is of great significance, the consumed storage life of the fire extinguishing agent can be calculated by a sectional integration method, and the residual life of the fire extinguishing agent can be estimated, but the stock solution of the water film-forming fire extinguishing agent is liquid with strong corrosivity to electronic equipment, the service life of a temperature sensing probe placed below the liquid level of the water film-forming fire extinguishing agent is often less than 1 year and far lower than the design life of the online monitoring system by 10 years, and frequent opening of the tank body to replace the temperature probe can cause accidental pollution and reduction of the air tightness of the tank body, and has bad influence on the storage life of the stock solution of the fire extinguishing agent, and consumes time and labor. In addition, the change trend of the temperature of the liquid in the tank body can not be predicted only by monitoring the temperature of the liquid in the tank body, and the capability of early warning the extreme temperature exceeding the storage allowable temperature range is not provided.
Disclosure of Invention
Aiming at the problems that a common temperature sensor is easy to corrode and lose efficacy and has limited functions in a water film-forming fire extinguishing agent, the invention provides a method for estimating the storage life of the water film-forming fire extinguishing agent stored in a tank by multiple temperature sources and providing extreme temperature early warning, and a method for estimating the temperature of the water film-forming fire extinguishing agent at present and in a future period of time by integrating the multiple temperature sources.
Yet another object of the present invention is to: an apparatus for providing the above method is provided.
The purpose of the invention is realized by the following scheme: a method for estimating the storage life of a water storage film-forming fire extinguishing agent of a tank and providing extreme temperature early warning by multiple temperature sources is realized by a system with a three-layer structure, a microcontroller unit MCU at the bottom layer is responsible for collecting temperature data, a computer at the middle layer is responsible for processing and forwarding the data, and a server at the top layer is responsible for carrying out communication butt joint, forecasting and training models with the outside; the method comprises the following steps:
(1) the microcontroller unit MCU of bottom connects each temperature sensing probe and collects, transmits and includes three kinds of temperature degree: according to the temperature sensor extending into the water film-forming fire extinguishing agent, the obtained internal temperature data is recorded as TInner part(ii) a The temperature sensor is pasted outside the tank body, and the obtained external temperature data is recorded as TOuter cover(ii) a And, an outside air temperature sensor for obtaining air temperature data recorded as TAir conditioner；
(2) The computer in the middle layer obtains the temperature data, predicts the residual service life of the stock solution of the water film-forming fire extinguishing agent at the standard room temperature (298.2 Kelvin) through a standard chemical reaction model, and transmits the residual service life back to the server in the top layer, the standard chemical reaction model estimates the proportion of the service life loss of the water film-forming fire extinguishing agent in a period of time through the following formula I, and the formula I is as follows:
L = Aexp（-BTinner part) Formula I
In the formula I, L is the total expected life of the water film-forming fire extinguishing agent at a specific temperature, and A and B are constants given by earlier experiments;
(3) the server at the top layer calculates the remaining storage life of the fire extinguishing agent under the local air temperature condition by using the local calendar year air temperature data; the server also predicts the temperature trend of the water film forming fire extinguishing agent stock solution in a future period of time by using weather forecast, and simulates the relation between the local air temperature historical data and the tank temperature historical data by establishing a machine learning model; when the server predicts that the temperature of the liquid in the tank possibly exceeds the storage required temperature in a future period of time through local weather forecast, an intervention signal is sent out to allow staff to take corresponding measures in time.
In the step (1), the temperature sensor and the gas temperature sensor outside the tank body are both elements which are easy to replace and do not contact with the fire extinguishing agent stock solution, and when the elements fail, the elements are allowed to be replaced under the state that the system does not stop.
In the step (2), the middle layer computer utilizes the data of the external temperature sensor and the external air sensor of the tank body to deduce the temperature of the liquid in the tank through a heat transfer model, so that when the temperature sensor in the tank fails due to corrosion, the temperature sensor does not need to be replaced, and the middle layer computer replaces the measured value with the calculated value.
The invention discloses a method for estimating the storage life of a water storage film-forming fire extinguishing agent of a tank and providing extreme temperature early warning by multiple temperature sources, which comprises the following steps:
(1) the MCU is responsible for connecting various temperature sensing probes and collecting 3 temperature data, namely the temperature sensor extending into the water film-forming fire extinguishing agent to obtain the internal temperature data and recording the internal temperature data as TInner part(ii) a The temperature sensor is pasted outside the tank body, and the obtained external temperature data is recorded as TOuter cover(ii) a An external air temperature sensor for obtaining air temperature data and recording the data as TAir conditioner。
(2) The interlayer computer obtains the temperature data and passes the formula L = Aexp (-BT)Inner part) Estimating the proportion of the life loss of the water film-forming fire extinguishing agent in a period of time, wherein L in the formula represents the total expected life of the water film-forming fire extinguishing agent at a specific temperature, and A and B are constants given by earlier experiments. For a particular time dt, then there is L1 = L0 – dt*( Aexp(-BTInner, 0))/ ( Aexp(-BTInner 1) Wherein L) is0For the expected residual life of the extinguishing agent at standard room temperature, L1For the expected life of the extinguishing agent at standard room temperature after the end of this period, TInner 1Represents the average temperature of the liquid during the period of time, TInner, 0Representing standard room temperature, 298.2 degrees kelvin may be taken. It is easy to understand if TInner 1Also at standard room temperature (i.e., 298.2 degrees Kelvin), then L1 = L0Dt, which represents the storage life dt of the extinguishing agent lost after the current period of time; if TInner 1Above standard room temperature, then L1 <L0Dt, representing accelerated life consumption at that time; if TInner 1Less than the standard room temperature, then L1 >L0Dt, representing the life-time-slowing consumption at that time. Therefore, after the total life value L is given by the system starting time, the value is continuously reduced and stored by the middle layer computer along with the operation of the system, and the physical meaning of the value is the residual life of the current water film-forming fire extinguishing agent stock solution at the standard room temperature.
(3) A method of handling a failure is contemplated. In the invention, if the temperature sensor in the water film-forming fire extinguishing agent stock solution is corroded to lose efficacy, the temperature sensor does not need to be replaced, and the value can be calculated by the temperature sensor outside the tank body and the air temperature sensor. The external sensor of the tank can be regarded as the temperature of the external surface liquid, and the relationship between the temperature and the internal temperature can be expressed as: a (T)Inner 1 – TOuter, 1 ）= B（TAir, 1 – TOuter, 1）+ C（TAir, 1 – TOuter, 1）3 + D（TAir, 1 – TOuter, 1）5In the formula, TInner 1，TOuter, 1And TAir, 1The internal temperature of the fire extinguishing agent, the external temperature of the tank body and the air temperature obtained by the sensors in the period are respectively A, B, C, D are constants, the physical meaning of the formula is that the heat exchange value of the tank body and the air is equal to the heat exchange value of the tank body and the internal liquid, and the formula is established when the heat capacity value of the tank body is small and the temperature difference is not large. Experiments show that the two conditions can be met. The terms of power 3 and power 5 on the right of the formula are used for simulating the additional heat exchange generated by high-speed convection of air, and can be omitted according to the actual situation of storage of the tank body. When the internal temperature sensor, the external tank body temperature sensor and the air temperature sensor work normally, the intermediate layer computer can obtain an overdetermined linear equation set through continuous data observation, calculate to obtain an average value of A, B, C, D, and when the internal temperature sensor fails, T can be usedOuter, 1And TAir, 1And A, B, C, D estimate TInner 1Value of (A)Thus, in the present invention, the internal temperature sensor only needs to operate normally for a short period of time, and the intermediate level computer will automatically replace the measured value with the calculated value when it fails. And the external tank body temperature sensor and the air temperature sensor are elements which are easy to replace and do not contact with the fire extinguishing agent stock solution, and can be conveniently replaced in a non-stop state when the elements are invalid.
(4) Server-side data processing and prediction. And (3) in the step (2), the middle layer computer obtains the residual service life of the fire extinguishing agent at the standard room temperature and transmits the residual service life back to the server side at the top layer, and the server side can calculate the residual storage service life of the fire extinguishing agent under the local air temperature condition by utilizing historical air temperature data. This function is critical to an on-line monitoring system because the agent life varies greatly with increasing temperature, and if the remaining life of a typical aqueous film-forming agent is 1 year at standard 298.2 kelvin, it will have a life of less than 2 months at 308.2 kelvin and must be replaced as quickly as possible. In addition to historical air temperature data, the server also predicts the temperature trend of the fire extinguishing agent in a future period by using weather forecast, and the specific method is to simulate the relation between the current ground air temperature and the temperature in the tank by establishing a machine learning model. Particularly, when the server predicts that the temperature of the liquid in the tank possibly exceeds the storage requirement in the future period of time, an intervention signal is sent out so as to facilitate the staff to take corresponding measures in time.
The invention also provides a multi-temperature source estimation tank water storage film-forming fire extinguishing agent storage life and an extreme temperature early warning device for the method, and the device is manufactured according to the basic principle. The bottom layer of the MCU system adopts an STM32L431 series single chip microcomputer which is provided with a LiteOS 5.0 real-time operating system, each MCU is connected with at least 8 temperature sensors and is connected with a middle layer computer through a serial port; the middle layer computer adopts a loongson 2K1000 series single chip microcomputer and is provided with a 64-bit double-precision floating point multiply-add part of full flow; hua Shinpeng Ascend 310 computing card elastic cloud server as the top server.
Preferably, the system adopts an STM32L431 series single chip microcomputer which is provided with a LiteOS 5.0 real-time operating system as a bottom layer MCU, and each MCU can be connected with at least 8 temperature sensors. The loongson 2K1000 series single-chip microcomputer is used as an intermediate layer computer and is provided with a 64-bit double-precision floating point multiply-add part of full-flow water, and the actual measurement single-chip microcomputer can be provided with about 20 MCUs; renting the Hua Kunpeng Ascend 310 computing card elastic cloud server instance as the top-level server.
Preferably, the MCU temperature data collection period in step (2) is 10 minutes.
Preferably, in step (3) and step (4), the period of analyzing and processing data by the middle-layer computer and the server side is 1 hour.
The invention provides a method for estimating the internal temperature of a water storage film forming tank by integrating multiple temperature sources, which is used for calculating the residual service life of a water film forming fire extinguishing agent and providing extreme temperature early warning. Has the advantages that:
(1) the data of various temperature sources are fully utilized, and the intelligent level is high;
(2) the middle computer is added in the traditional client-server structure, can process data generated by a plurality of local sets of bottom-layer MCUs and send results to the top-layer server, and leaves a large number of calculation tasks in local processing, so that a complex processing method which is difficult for the MCUs to calculate can be realized, and the communication bandwidth with the server is greatly saved.
(3) A large amount of domestic software and hardware are adopted, and the autonomy level is high.
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FIG. 1 is a block diagram of the apparatus of the present invention.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. The experimental procedures used in the following examples are all conventional procedures unless otherwise specified. Materials, reagents and the like used in the following examples are commercially available unless otherwise specified. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention.
A multi-temperature source device for estimating the storage life of a water storage film-forming fire extinguishing agent of a tank and providing an extreme temperature early warning is realized by a three-layer system as shown in figure 1, a microcontroller unit MCU at the bottom layer is responsible for collecting temperature data, a computer at the middle layer is responsible for processing and forwarding the data, and a server at the top layer is responsible for carrying out communication butt joint, prediction and training model with the outside; the method is realized as follows:
(1) the microcontroller unit MCU of bottom adopts the installation Hua to be the STM32L431 series singlechip of the real-time operating system of LiteOS 5.0, connects each temperature sensing probe and collects, transmits and includes three kinds of temperature degree: according to the temperature sensor extending into the water film-forming fire extinguishing agent, the obtained internal temperature data is recorded as TInner part(ii) a The temperature sensor is pasted outside the tank body, and the obtained external temperature data is recorded as TOuter cover(ii) a And an outside air temperature sensor for obtaining temperature data recorded as TAir conditioner；
(2) The middle layer computer adopts a loongson 2K1000 series single chip microcomputer to obtain the temperature data, the residual service life of the stock solution of the water film-forming fire extinguishing agent at the standard room temperature (298.2 Kelvin) is predicted through a standard chemical reaction model, and the residual service life is transmitted back to the server at the top layer, and the standard chemical reaction model estimates the proportion of the service life loss of the water film-forming fire extinguishing agent in a period of time through the following formula I:
L = Aexp（-BTinner part) Formula I
In the formula I, L is the total expected life of the water film-forming fire extinguishing agent at a specific temperature, and A and B are constants given by earlier experiments;
(3) renting an elastic cloud server which is Hua as spread, and calculating the remaining storage life of the fire extinguishing agent under the local air temperature condition by using local calendar year air temperature data; the server also predicts the temperature trend of the water film forming fire extinguishing agent stock solution in a future period of time by using weather forecast, and simulates the relation between the local air temperature historical data and the tank temperature historical data by establishing a machine learning model; when the server predicts that the temperature of the liquid in the tank possibly exceeds the storage required temperature in a future period of time through local weather forecast, an intervention signal is sent out to allow staff to take corresponding measures in time.
The multi-temperature source device for estimating the storage life of the water storage film-forming fire extinguishing agent of the tank and providing the extreme temperature early warning is manufactured according to the following steps:
(1) installing a LiteOS 5.0 operating system on an STM32L431 singlechip, respectively connecting a temperature sensor in a water film-forming fire extinguishing agent stock solution tank, a tank body temperature sensor and a gas temperature sensor, compiling a program to collect data of each temperature sensor at intervals of 10 minutes, and reporting each temperature average value to an interlayer computer through a serial port every 1 hour;
(2) the godson 2K1000 development board is used as a middle layer computer, the software is compiled to receive the hourly average value of each temperature sensor and process data through a mathematical model, the in-tank temperature, the tank body temperature and the air temperature are known by 2, the data are continuously monitored and whether sensor faults exist is judged, if faults exist, then: an in-tank sensor that stops receiving its data and replaces it with a calculated value; and an out-of-tank sensor or an air temperature sensor prompts a worker to replace the tank as soon as possible. And calculating the residual life of the water film-forming fire extinguishing agent stock solution at the standard room temperature through a standard chemical reaction model and sending the residual life together with other necessary data to a server.
(3) The elastic cloud server of the computation card of the Spanish Ascend 310 rents the China as the spread and receives necessary data sent by the middle layer computer through SSH encryption communication of the Internet of things. And establishing a machine learning model according to the local accumulated air temperature data and the historical data sent back by the middle layer, calculating a predicted value of the temperature in the tank and the expected residual life of the fire extinguishing agent stock solution under the local air temperature condition according to the medium-long term weather forecast brought-in model, and providing an extreme tank temperature early warning and a residual life shortage early warning according to the calculation result.
The above examples are merely illustrative for clearly illustrating the present invention and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.
Claims (9)
1. A method for estimating the storage life of a water storage film-forming fire extinguishing agent of a tank and providing extreme temperature early warning by multiple temperature sources is characterized by being realized by a system with a three-layer structure, wherein a microcontroller unit (MCU) at the bottom layer is responsible for collecting temperature data, a computer at the middle layer is responsible for processing and forwarding the data, and a server at the top layer is responsible for carrying out communication butt joint, prediction and training model with the outside; the method comprises the following steps:
(1) the microcontroller unit MCU of bottom connects each temperature sensing probe and collects, transmits and includes three kinds of temperature degree: according to the temperature sensor extending into the water film-forming fire extinguishing agent, the obtained internal temperature data is recorded as TInner part(ii) a The temperature sensor is pasted outside the tank body, and the obtained external temperature data is recorded as TOuter cover(ii) a And, an outside air temperature sensor for obtaining air temperature data recorded as TAir conditioner；
(2) The computer in the middle layer obtains the temperature data, predicts the residual service life of the stock solution of the water film-forming fire extinguishing agent at the standard room temperature (298.2 Kelvin) through a standard chemical reaction model, and transmits the residual service life back to the server in the top layer, the standard chemical reaction model estimates the proportion of the service life loss of the water film-forming fire extinguishing agent in a period of time through the following formula I, and the formula I is as follows:
L = Aexp（-BTinner part) Formula I
In the formula I, L is the total expected life of the water film-forming fire extinguishing agent at a specific temperature, and A and B are constants given by earlier experiments;
(3) the server at the top layer calculates the remaining storage life of the fire extinguishing agent under the local air temperature condition by using the local calendar year air temperature data; the server also predicts the temperature trend of the water film forming fire extinguishing agent stock solution in a future period of time by using weather forecast, and simulates the relation between the local air temperature historical data and the tank temperature historical data by establishing a machine learning model; when the server predicts that the temperature of the liquid in the tank possibly exceeds the storage required temperature in a future period of time through local weather forecast, an intervention signal is sent out to allow staff to take corresponding measures in time.
2. The method for estimating the storage life of a tank storing water-film forming fire extinguishing agent and providing extreme temperature warning according to claim 1, wherein in step (1), the tank external temperature sensor and the gas temperature sensor are both elements which are easy to replace and do not contact with the fire extinguishing agent stock solution, and when the temperature sensor and the gas temperature sensor fail, the temperature sensor and the gas temperature sensor are allowed to be replaced without stopping the system.
3. The method for multiple temperature sources to estimate the pot water storage film forming fire extinguishing agent shelf life and provide extreme temperature warning as claimed in claim 1, wherein in step (2), the interlayer computer uses the data of the outside temperature sensor and the outside air sensor to deduce the temperature of the liquid in the pot through a heat transfer model, so that when the temperature sensor in the pot fails due to corrosion, it does not need to be replaced, and the interlayer computer will replace the measured value with the calculated value.
4. The method for estimating the storage life of a tank-stored water-film forming fire extinguishing agent and providing an extreme temperature warning according to claim 1 or 3, wherein in step (2), for a specific period of time dt, there is a formula model II:
L1 = L0 – dt*( Aexp(-BTinner, 0))/ ( Aexp(-BTInner 1) Formula II
In the formula II, L0For the expected residual life of the extinguishing agent at standard room temperature, L1For the expected life of the extinguishing agent at standard room temperature after the end of this period, TInner 1Representing the internal temperature data, T, of the liquid during that timeInner, 0Representing standard room temperature, taking 298.2 degrees Kelvin; then, if TInner 1Also at standard room temperature of 298.2 degrees Kelvin, then L1 = L0Dt, which represents the storage life dt of the extinguishing agent lost after the current period of time; if TInner 1Above standard room temperature, then L1 <L0Dt, representing accelerated life consumption at that time; if TInner 1Less than the standard room temperature, then L1 >L0Dt, representing the life-time-slowing consumption at that time; thus, after a given total life value L at system start-up time, the value will be continually reduced and stored by the middle tier computer as the system operates.
5. The method of claim 3 wherein if the temperature sensor in the stock solution of the aqueous film forming fire extinguishing agent is corroded and fails, it is not necessary to replace the temperature sensor, and the value is calculated by the outside temperature sensor and the outside air sensor, and the outside sensor is regarded as the temperature of the liquid on the outer surface layer, and the relationship between the temperature and the inside temperature is expressed as formula III:
A（Tinner 1–TOuter 1）= B（THollow 1–TOuter 1）+ C（THollow 1–TOuter 1）3 + D（THollow 1–TOuter 1）5Formula III
In the formula III, TInner 1，TOuter, 1And TAir, 1A, B, C, D are constants of the internal temperature of the fire extinguishing agent, the external tank temperature and the air temperature obtained by the sensors in the period.
6. The method for estimating the storage life of a water-storage film-forming fire extinguishing agent and providing extreme temperature early warning according to claim 1, wherein in the step (3), the server estimates the residual life of the water-storage film-forming fire extinguishing agent stock solution under the local air temperature condition by using the historical temperature of the local calendar year and the residual life provided by the intermediate layer computer of the water-storage film-forming fire extinguishing agent stock solution under the standard room temperature, so as to scientifically make the replacement work plan of the water-storage film-forming fire extinguishing agent.
7. The method for estimating the storage life of a tank water-storage film-forming fire extinguishing agent and providing extreme temperature early warning according to claim 1, wherein in the step (3), in the step (2), the computer in the middle layer obtains the remaining life of the fire extinguishing agent at the standard room temperature and transmits the remaining life back to the server end at the top layer, and the server establishes a data set by using the local historical temperature record and the historical temperature record of the stock solution of the tank water-storage film-forming fire extinguishing agent, namely the measured value or the calculated value, and establishes a model through machine learning; the temperature of the original liquid of the water film-forming fire extinguishing agent can be predicted in the future by local air temperature forecast, and when the temperature exceeds the product requirement limit value, particularly when the server predicts that the temperature of the liquid in the tank possibly exceeds the storage requirement in the future, an intervention signal is sent out to generate an alarm to prompt a worker to take corresponding measures.
8. The method of any one of claims 1 to 7, wherein a bottom layer of Micro Controller Unit (MCU) system adopts an STM32L431 series single chip microcomputer provided with a LiteOS 5.0 real-time operating system, and each MCU is connected with at least 8 temperature sensors; the middle layer computer adopts a loongson 2K1000 series single chip microcomputer and is provided with a 64-bit double-precision floating point multiply-add part of full flow; hua Shinpeng Ascend 310 computing card elastic cloud server as the top server.
9. The device for estimating the storage life of the water storage film-forming fire extinguishing agent and providing the extreme temperature early warning according to the multiple temperature sources of the water storage film-forming fire extinguishing agent of the tank as claimed in claim 8, wherein an STM32L431 series single chip microcomputer provided with a LiteOS 5.0 real-time operating system is adopted as a bottom MCU, a Loongson 2K1000 series single chip microcomputer is adopted as a middle computer, and a multi-temperature source estimation tank storage film-forming fire extinguishing agent storage life and providing the extreme temperature early warning system provided with a Kunpeng elastic cloud server as a top server are rented, and the device is assembled according to the following steps:
(1) installing a LiteOS 5.0 operating system on an STM32L431 singlechip, respectively connecting a temperature sensor in a water film-forming fire extinguishing agent stock solution tank, a tank body temperature sensor and a gas temperature sensor, compiling a program to collect data of each temperature sensor at intervals of 10 minutes, and reporting each temperature average value to an interlayer computer through a serial port every 1 hour;
(2) the godson 2K1000 development board is used as a middle layer computer, the software is compiled to receive the hourly average value of each temperature sensor and process data through a mathematical model, the in-tank temperature, the tank body temperature and the air temperature are known by 2, the data are continuously monitored and whether sensor faults exist is judged, if faults exist, then: an in-tank sensor that stops receiving its data and replaces it with a calculated value; and an out-of-tank sensor or an air temperature sensor prompts a worker to replace the tank as soon as possible. Calculating the residual life of the water film-forming fire extinguishing agent stock solution at the standard room temperature through a standard chemical reaction model, and sending the residual life together with other necessary data to a server;
(3) the elastic cloud server of the computation card of the spread ascent 310 rents the China, and receives necessary data sent by the middle-layer computer through SSH encryption communication of the Internet of things; and establishing a machine learning model according to the local accumulated air temperature data and the historical data sent back by the middle layer, calculating a predicted value of the temperature in the tank and the expected residual life of the fire extinguishing agent stock solution under the local air temperature condition according to the medium-long term weather forecast brought-in model, and providing an extreme tank temperature early warning and a residual life shortage early warning according to the calculation result.
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