Electrical fire identification and early warning system and method

Abstract

The invention discloses an electrical fire identification and early warning system and method, which can be applied to the technical field of fire early warning. According to the application, a deployment mode of end-side cloud is realized through a plurality of slave ends, a host end and a data background, so that mass data can be monitored and pre-warned, and meanwhile, a temperature sensor, a current sensor, a controller and a wireless transmission module are arranged in each slave end; real-time current and real-time temperature of a monitored cable can be collected and transmitted through the slave end, and a controller, a temperature sensor and a wireless transmission module are arranged in the host end, so that the ambient temperature of the position where the monitored cable is located can be collected through the host end. And the second real-time current and the second real-time temperature are combined to carry out electrical fire identification early warning operation, so that the real-time performance and accuracy of electrical fire identification early warning can be effectively improved, alarm reminding is carried out in a data background, and a worker can know the state of the cable in time.

Description

Technical Field

[0001] The present application relates to the field of fire warning technology, and in particular to an electrical fire identification and warning system and method. Background Art

[0002] In related technologies, with the substantial increase in electricity demand for production and life, modern buildings and complex indoor and outdoor decoration, as well as electrical wiring, have led to a sharp increase in the risk of electrical fires. According to statistics, electrical factors are the primary cause of building fires, especially phase short circuits, leakage currents, circuit breaker or line overloads, as well as factors such as humid environments, damaged insulation, and increased line-to-ground capacitance, which may cause fires and lead to huge losses of life and property. Therefore, in order to effectively prevent the occurrence of electrical or circuit fires, it is very important to develop an electrical fire warning system.

[0003] The traditional way of early warning for electrical fires is that staff will regularly inspect electrical equipment, check the operating status of the equipment, and promptly discover and deal with potential safety hazards. However, this manual inspection method has problems such as long inspection cycles, omissions of details, and reliance on subjective factors, resulting in low early warning efficiency and low accuracy. Conventional safety monitoring methods are also an important way to early warning for electrical fires. For example, thermometers, ammeters and other equipment are used to monitor the temperature, current and other parameters of electrical lines and equipment in real time. When these parameters exceed the preset safety threshold, the system will issue an early warning signal to remind people to take timely measures to deal with them. However, this early warning method can usually only monitor abnormal situations that have already occurred, and cannot provide early warning for electrical fires.

[0004] In summary, the technical problems existing in the relevant technologies need to be improved. Summary of the invention

[0005] The main purpose of the embodiments of the present application is to provide an electrical fire identification and warning system and method, which can effectively improve the real-time and accuracy of electrical fire identification and warning.

[0006] To achieve the above objectives, one aspect of an embodiment of the present application provides an electrical fire identification and warning system, the system comprising:

[0007] A plurality of slave ends, each of which includes a first temperature sensor, a current sensor, a first controller and a first wireless transmission module; the current sensor is used to collect a first real-time current of a monitored cable, the first temperature sensor is used to collect a first real-time temperature of the monitored cable, the first controller is used to control the working states of the first temperature sensor and the current sensor according to a control command, and preliminarily process the first real-time current and the first real-time temperature to obtain a second real-time current and a second real-time temperature;

[0008] A host end, the host end includes a second controller, a second temperature sensor, a second wireless transmission module and a third wireless transmission module; the second temperature sensor is used to collect the ambient temperature of the location where the monitored cable is located; the first controller interacts with the second controller through the first wireless transmission module and the second wireless transmission module; the second controller is used to forward the control command to the first controller, and after receiving the second real-time current, the second real-time temperature and the ambient temperature, perform electrical fire identification and early warning operations according to the second real-time current, the second real-time temperature and the ambient temperature;

[0009] Data background, the second controller interacts with the data background through the third wireless transmission module; the data background is used to send the control command to the second controller, and after receiving the data sent by the second controller, issue an alarm for abnormal situations.

[0010] In some embodiments, the performing electrical fire identification and warning operation according to the second real-time current, the second real-time temperature and the ambient temperature includes:

[0011] Obtain the conductor material type, insulation material type, cable phase number and conductor nominal cross-section of the monitored cable;

[0012] Calculate the corrected current at the ambient temperature according to the conductor material type, the insulation material type, the number of cable phases, the conductor nominal cross-section and the ambient temperature;

[0013] An electrical fire identification and warning operation is performed based on the magnitude relationship between the second real-time current and the correction current, or an electrical fire identification and warning operation is performed based on the magnitude relationship between the second real-time temperature and the ambient temperature.

[0014] In some embodiments, the slave end also includes an online power supply module and a linear regulator; the online power supply module is used to sense power and obtain a first induced current; the linear regulator is used to rectify and convert the first induced current to obtain a stable voltage.

[0015] In some embodiments, the slave end further includes a silicone strap, which is disposed at the outer end of the slave end, and the slave end fixes the monitoring position through the silicone strap.

[0016] In some embodiments, the host side also includes a storage module, and the storage module is used to store historical data of the slave side.

[0017] In some embodiments, the host end also includes a shell and a screen, the second controller, the second temperature sensor, the third wireless transmission module and the storage module are arranged inside the shell, and the screen is fixed to the upper surface of the shell.

[0018] In some embodiments, the first wireless transmission module includes a 433 MHz wireless transmission module, and the third wireless transmission module includes a NB-IOT module.

[0019] In some embodiments, the NB-IOT module further includes an external antenna, and the external antenna includes a GSM glue stick antenna.

[0020] In some embodiments, the host end further includes an adapter, and the adapter is used to convert the 220V voltage into a 5V voltage.

[0021] To achieve the above object, another aspect of the embodiment of the present application provides an electrical fire identification and warning method, which is applied to the above system and includes the following steps:

[0022] Acquire a second real-time current and a second real-time temperature of the monitored cable, wherein the second real-time current and the second real-time temperature are acquired from the slave end;

[0023] Obtaining the ambient temperature of the location where the monitored cable is located, wherein the ambient temperature is collected by a host terminal;

[0024] Performing an electrical fire identification and warning operation according to the second real-time current, the second real-time temperature and the ambient temperature;

[0025] The second real-time current, the second real-time temperature and the ambient temperature that are determined to be abnormal by the predicted operation are uploaded to the data background so that the data background issues an alarm reminder.

[0026] The embodiments of the present application include at least the following beneficial effects: The present application provides an electrical fire identification and warning system and method, which implements an end-edge cloud deployment mode by means of a number of slave ends, a host end and a data background, thereby being able to monitor and warn of massive amounts of data, and at the same time, a temperature sensor, a current sensor, a controller and a wireless transmission module are arranged in each slave end, and the real-time current and real-time temperature of the monitored cable can be collected and transmitted through the slave end, and a controller, a temperature sensor and a wireless transmission module are arranged in the host end, and the ambient temperature of the location of the monitored cable can be collected through the host end, and electrical fire identification and warning operations can be performed based on the second real-time current, the second real-time temperature and the ambient temperature, thereby effectively improving the real-time and accuracy of electrical fire identification and warning, and then sending abnormal data to the data background in real time, so that real-time alarm reminders can be made, so that the staff can understand the cable status in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is an interactive schematic diagram of an electrical fire identification and warning system provided in an embodiment of the present application;

[0028] Figure 2 It is a module schematic diagram of the slave end provided in an embodiment of the present application;

[0029] Figure 3 It is a module diagram of the host side provided in an embodiment of the present application. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the embodiments of the present application, they are only examples of devices and methods consistent with some aspects of the embodiments of the present application.

[0031] It is understood that the terms "first", "second", etc. used in this application can be used to describe various concepts in this article, but unless otherwise specified, these concepts are not limited by these terms. These terms are only used to distinguish one concept from another concept. For example, without departing from the scope of the embodiment of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the words "if" and "if" as used herein can be interpreted as "at the time of" or "when" or "in response to determination".

[0032] The terms "at least one", "multiple", "each", "any", etc. used in this application, at least one includes one, two or more, multiple includes two or more, each refers to each of the corresponding multiple, and any refers to any one of the multiple.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0034] Figure 1 is an optional flow chart of an electrical fire identification and warning system provided in an embodiment of the present application. Figure 1The system in the embodiment may include but is not limited to a plurality of slave terminals 110, a host terminal 120 and a data backend 130, wherein the slave terminals 110 and the host terminal 120 are both deployed on the edge 100, and the data backend is deployed on the cloud side. Figure 2 As shown, each slave end includes a first temperature sensor, a current sensor, a first controller and a first wireless transmission module; Figure 3 As shown, the host end includes a second controller, a second temperature sensor and a third wireless transmission module. The first controller interacts with the second controller through the first wireless transmission module and the second wireless transmission module, and the second controller interacts with the data background through the third wireless transmission module. During the working process, the staff can input the control command to the data background through the terminal device, and the data background sends the control command to the host end through the third wireless transmission module, and the host end forwards the control command to the corresponding slave end through the first wireless transmission module to control the slave end to perform the corresponding work. When the slave end starts to monitor the monitored cable in real time, the current sensor collects the first real-time current of the monitored cable, the first temperature sensor collects the first real-time temperature of the monitored cable, and the first controller performs preliminary processing on the first real-time current and the first real-time temperature to obtain the second real-time current and the second real-time temperature; at the same time, the second temperature sensor collects the ambient temperature of the location of the monitored cable, and the second controller receives the second real-time current, the second real-time temperature and the ambient temperature, and performs electrical fire identification and early warning operations according to the second real-time current, the second real-time temperature and the ambient temperature, so that the data background can warn of abnormal situations.

[0035] It is understandable that the first wireless transmission module and the second wireless transmission module both include a 433MHz wireless transmission module, and the 433MHz wireless transmission module is composed of LSD1 RF-ST433M00_433M and an antenna, and the antenna model is KH-433-2-JB. The third wireless transmission module includes a NB-IOT module, and the NB-IOT module also includes an external antenna, and the external antenna includes a GSM rubber stick antenna. Specifically, a host terminal can communicate with no more than 252 slave terminals within 300 meters through a 433MHz wireless transmission module. After several host terminals are connected to the NB-IOT module, they interact with the data background. After the staff pre-sets various functional permissions of the terminal users in the data background through the network, the terminal users can obtain the status information of each slave terminal on the front end in real time through the network.

[0036] In an embodiment of the present application, the first temperature sensor may be an NTC thermistor, so as to collect the real-time temperature of the monitored cable in real time through the NTC thermistor to improve the accuracy of temperature collection. The second temperature sensor may be an NTC thermistor, and the model of the thermistor may be MF52D104F3950. The current sensor collects the surface leakage current of the monitored cable in real time, so that it can be judged whether the cable will have a short circuit, leakage, short circuit, etc. through the surface leakage current. It can be understood that after receiving the first real-time current and the first real-time temperature, the first controller converts these analog signals into digital signals (the second real-time current and the second real-time temperature) for transmission, thereby improving the stability of data transmission.

[0037] In the embodiments of the present application, Figure 2 As shown, the slave end also includes a power supply module, which includes an online power supply module and a linear regulator; the online power supply module can be composed of a coreless coil of a power supply alloy sheet, which is used to inductively obtain power to obtain a first induced current; the linear regulator is used to rectify and convert the first induced current to obtain a stable voltage of 3.3V to ensure the stable working state of the slave end. In this embodiment, the slave end also includes a silicone strap, which is arranged at the outer end of the slave end to protect the main body of the slave end. In addition, the slave end fixes the monitoring position through the silicone strap.

[0038] In the embodiments of the present application, Figure 3 As shown, the host end also includes a storage module, a shell and a screen. The storage module is used to store historical data of the slave end. The second controller, the second temperature sensor, the third wireless transmission module and the storage module are arranged inside the shell, and the screen is fixed to the upper surface of the shell.

[0039] In the embodiment of the present application, there are two data exchange modes between the host side and the data background. One is that when no abnormal signal is found on the host side, the corresponding data will be stored in the storage module, and the data background will poll the data in the storage module in the host side by means of timed subscription; the other is that when an abnormal signal is found, the host side will actively report the abnormal data to the data background immediately, and the data will also be stored in the storage module. It can be understood that the second controller in the host side integrates a series of algorithms to determine whether the data monitored by the slave side is stored abnormally. After the abnormality occurs, the abnormal data is directly sent to the data background through the NB-LOT network. After the data background receives the abnormal data, after the algorithm judgment, the alarm information can be sent to the relevant management personnel among the terminal users immediately. Specifically, since the situations in which electrical fires occur in cables are different under different ambient temperatures, this embodiment obtains the conductor material type, insulation material type, number of cable phases and nominal conductor cross-section of the monitored cable, and then first calculates the rated current flowing through the cable at 30°C according to the conductor material type, insulation material type, number of cable phases and nominal conductor cross-section S, and then corrects the rated current according to the measured ambient temperature of the cable, calculates the corrected current at the ambient temperature, and then performs electrical fire identification and warning operations based on the relationship between the second real-time current and the corrected current, or performs electrical fire identification and warning operations based on the relationship between the second real-time temperature and the ambient temperature.

[0040] It is understood that the insulation material types of the monitored cables include PVC insulation, XLPE / EPR insulation, and the conductor material types include copper and aluminum. The monitored cables can be single-phase or three-phase cables, depending on the actual monitored situation.

[0041] Specifically, this embodiment first calculates the rated current I of the monitored cable at a temperature of 30°C. 30 , Rated current I of several typical cables at 30℃ 30 The calculation method is as follows

[0042] 1) The cable sheath is PVC insulated and the inner conductor is copper:

[0043] a) When the cable is a single-phase cable:

[0044] I 30 =17.1×S 0.632 ; Where, S is the cross-sectional area of ​​the cable.

[0045] b) When the cable is a three-phase cable:

[0046] I 30 =13.28×S 0.6564 ; Where, S is the cross-sectional area of ​​the cable.

[0047] 2) The cable sheath is PVC insulated and the internal conductor is aluminum:

[0048] a) When the cable is a single-phase cable:

[0049] I 30 =12×S 0.653 ; Where, S is the cross-sectional area of ​​the cable.

[0050] b) When the cable is a three-phase cable:

[0051] I 30 =9.9×S 0.663 ; Where, S is the cross-sectional area of ​​the cable.

[0052] 3) The cable sheath is XLPE / EPR insulation, and the inner part is copper conductor:

[0053] a) When the cable is a single-phase cable:

[0054] I 30 =20.8×S 0.636 ; Where, S is the cross-sectional area of ​​the cable.

[0055] b) When the cable is a three-phase cable:

[0056] I 30 =16×S 0.6633 ; Where, S is the cross-sectional area of ​​the cable.

[0057] 4) The cable sheath is XLPE / EPR insulation, and the internal conductor is aluminum:

[0058] a) When the cable is a single-phase cable:

[0059] I 30 =14.7×S 0.654 ; Where, S is the cross-sectional area of ​​the cable.

[0060] b) When the cable is a three-phase cable:

[0061] I 30 =11.9×S 0.671 ; Where, S is the cross-sectional area of ​​the cable.

[0062] The rated current I of the cable at 30°C is 30 Finally, the temperature correction factor η should be introduced according to the actual working environment temperature of the monitored cable, and the rated current I 30 Correction is performed to calculate the corrected current passing through the cable at the actual working environment temperature. For cables with different insulation layers, different correction coefficients are used. The specific calculation process is as follows:

[0063] 1) For cables with PVC insulation:

[0064] I 修 =η×I 30 =(-0.0001×T 2 -0.0053×T+1.2789)×I 30 ;

[0065] 2) For cables with XLPE / EPR insulation;

[0066] I 修 =η×I 30 =(-0.00007×T 2 -0.004×T+1.1895)×I 30 ;

[0067] Wherein, T is the actual working environment temperature of the cable, referred to as ambient temperature.

[0068] Then based on the correction current I 修 , the second real-time current I 测 , the second real-time temperature T 测 and ambient temperature T, electrical fire identification and warning operations can be performed. Specifically, the situations that trigger the warning are divided into the following categories:

[0069] 1) When the second real-time current I 测 Exceeds the correction current I at the current ambient temperature 修 10%, that is, I 测 >1.1I 修 , determine that the cable current is abnormal and an electrical fire warning is needed;

[0070] 2) When the second real-time current measured on cables of different phases in the same loop differs significantly, that is, It is determined that the cable current is abnormal and an electrical fire warning is required. 1测 and I 2测 are the second real-time currents measured on cables of different phases respectively;

[0071] 3) When the second real-time temperature is significantly higher than the ambient temperature, that is, ΔT = T 测 -T>25℃, it is determined that the cable current is abnormal and an electrical fire warning is required, where T 测 is the second real-time temperature monitored, T is the ambient temperature;

[0072] 4) When the second real-time temperature changes too much, that is, ΔT′=T n+1 -T n >15℃, it is determined that the cable current is abnormal and an electrical fire warning is required. n+1is the second real-time temperature obtained by the n+1th monitoring, T n The cable temperature monitored for the nth monitoring;

[0073] 5) When the second real-time temperature is too high, that is, T n >85℃, it is determined that the cable current is abnormal and an electrical fire warning is required. n The second real-time temperature measured for the nth monitoring;

[0074] 6) When the second real-time temperature changes too fast, that is It is determined that the cable current is abnormal and an electrical fire warning is required. n+1 is the second real-time temperature measured by the n+1th monitoring, T n is the second real-time temperature measured by the nth monitoring, d t is the time interval between two monitorings.

[0075] Through the above-mentioned judgment process, this embodiment can effectively improve the accuracy of electrical fire identification and warning.

[0076] In summary, the system provided by the embodiment of the present application has the following beneficial effects:

[0077] (1) This application realizes real-time data collection and processing. Specifically, by installing a slave terminal on the "end" side, it is possible to obtain real-time operating data of electrical lines and equipment, including key parameters such as current, voltage, and temperature, and then transmit this data to the "edge" side and the "cloud" side. After efficient processing and analysis, abnormal situations can be discovered in time and early warnings can be issued, thereby improving the accuracy and timeliness of electrical fire early warnings.

[0078] (2) This application improves the intelligence level of early warning. Specifically, through cloud computing and big data technology, deep learning and analysis of massive electrical data can be carried out to identify potential fire risks. At the same time, predictions and judgments can be made based on the changing trends of historical data and real-time data, so as to issue early warning signals in advance and help managers take timely preventive measures.

[0079] (3) This application also achieves optimal resource allocation and collaborative work. By deploying edge computing devices on the "edge" side, the front-end data can be preliminarily processed and analyzed, reducing the computing pressure on the cloud. At the same time, the "edge" side can also communicate and coordinate with the "end" side devices in real time to ensure the timely transmission and processing of warning information. On the "cloud" side, by building a unified electrical fire warning platform, data sharing and interoperability can be achieved, improving the coordination and efficiency of warnings.

[0080] (4) This application can also reduce operation and maintenance costs and improve management efficiency. This application can automatically monitor and warn of electrical fire risks, reduce the frequency and intensity of manual inspections, and reduce labor costs. At the same time, it can also provide comprehensive data analysis and reporting functions to help managers better understand the operating conditions and safety risks of electrical equipment, thereby formulating more scientific and reasonable maintenance and management strategies.

[0081] In addition, the embodiment of the present application also provides an electrical fire identification and warning method, which is applied to the above system, and the method includes but is not limited to the following steps:

[0082] Acquire a second real-time current and a second real-time temperature of the monitored cable, wherein the second real-time current and the second real-time temperature are acquired from the slave end;

[0083] Obtain the ambient temperature of the location where the monitored cable is located, and the ambient temperature is collected by the host end;

[0084] Perform electrical fire identification and early warning operations according to the second real-time current, the second real-time temperature and the ambient temperature;

[0085] The second real-time current, the second real-time temperature and the ambient temperature that are determined to be abnormal by the prediction operation are uploaded to the data background so that the data background issues an alarm reminder.

[0086] It can be understood that the contents of the above system embodiments are all applicable to the present method embodiments, the functions specifically implemented by the present method embodiments are the same as those of the above system embodiments, and the beneficial effects achieved are also the same as those achieved by the above system embodiments.

[0087] The embodiments described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Those skilled in the art will appreciate that with the evolution of technology and the emergence of new application scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0088] Those skilled in the art will appreciate that the technical solutions shown in the figures do not constitute a limitation on the embodiments of the present application, and may include more or fewer steps than shown in the figures, or a combination of certain steps, or different steps.

[0089] The device embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separated, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0090] Those skilled in the art will appreciate that all or some of the steps in the methods disclosed above, and the functional modules / units in the systems and devices may be implemented as software, firmware, hardware, or a suitable combination thereof.

[0091] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0092] It should be understood that in the present application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0093] In the several embodiments provided in the present application, it should be understood that the disclosed systems and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the above units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0094] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0095] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0096] If the integrated unit is implemented in the form of a software functional 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 solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including multiple instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, referred to as ROM), random access memory (Random Access Memory, referred to as RAM), disk or optical disk and other media that can store programs.

[0097] The preferred embodiments of the present invention are described above with reference to the accompanying drawings, but the scope of the rights of the present invention is not limited thereto. Any modification, equivalent substitution and improvement made by a person skilled in the art without departing from the scope and essence of the present invention should be within the scope of the rights of the present invention.

Claims

1. An electrical fire identification and warning system, characterized in that: The system comprises: A plurality of slave ends, each of which includes a first temperature sensor, a current sensor, a first controller and a first wireless transmission module; the current sensor is used to collect a first real-time current of a monitored cable, the first temperature sensor is used to collect a first real-time temperature of the monitored cable, the first controller is used to control the working states of the first temperature sensor and the current sensor according to a control command, and preliminarily process the first real-time current and the first real-time temperature to obtain a second real-time current and a second real-time temperature; A host end, the host end includes a second controller, a second temperature sensor, a second wireless transmission module and a third wireless transmission module; the second temperature sensor is used to collect the ambient temperature of the location of the monitored cable; the first controller interacts with the second controller through the first wireless transmission module and the second wireless transmission module; the second controller is used to forward the control command to the first controller, and after receiving the second real-time current, the second real-time temperature and the ambient temperature, perform electrical fire identification and warning operations according to the second real-time current, the second real-time temperature and the ambient temperature; Data background, the second controller interacts with the data background through the third wireless transmission module; the data background is used to send the control command to the second controller, and after receiving the data sent by the second controller, issue an alarm for abnormal situations.

2. The electrical fire identification and warning system according to claim 1, characterized in that: The performing of electrical fire identification and warning operation according to the second real-time current, the second real-time temperature and the ambient temperature comprises: Obtain the conductor material type, insulation material type, cable phase number and conductor nominal cross-section of the monitored cable; Calculate the corrected current at the ambient temperature according to the conductor material type, the insulation material type, the number of cable phases, the conductor nominal cross-section and the ambient temperature; An electrical fire identification and warning operation is performed based on the magnitude relationship between the second real-time current and the correction current, or an electrical fire identification and warning operation is performed based on the magnitude relationship between the second real-time temperature and the ambient temperature.

3. The electrical fire identification and warning system according to claim 1, characterized in that: The slave end also includes an online power supply module and a linear regulator; the online power supply module is used for induction power supply to obtain a first induced current; the linear regulator is used for rectifying and converting the first induced current to obtain a stable voltage.

4. The electrical fire identification and warning system according to claim 3, characterized in that: The slave end further comprises a silicone strap, which is arranged at the outer end of the slave end, and the slave end fixes the monitoring position through the silicone strap.

5. The electrical fire identification and warning system according to claim 1, characterized in that: The host end also includes a storage module, and the storage module is used to store the historical data of the slave end.

6. The electrical fire identification and warning system according to claim 5, characterized in that: The host end also includes a shell and a screen. The second controller, the second temperature sensor, the third wireless transmission module and the storage module are arranged inside the shell. The screen is fixed to the upper surface of the shell.

7. The electrical fire identification and warning system according to claim 1, characterized in that: The first wireless transmission module includes a 433 MHz wireless transmission module, and the third wireless transmission module includes a NB-IOT module.

8. The electrical fire identification and warning system according to claim 7, characterized in that: The NB-IOT module also includes an external antenna, and the external antenna includes a GSM glue stick antenna.

9. The electrical fire identification and warning system according to claim 6, characterized in that: The host end also includes an adapter, which is used to convert the 220V voltage into a 5V voltage.

10. An electrical fire identification and early warning method, characterized in that: The method is applied to the system according to any one of claims 1 to 9, and the method comprises the following steps: Acquire a second real-time current and a second real-time temperature of the monitored cable, wherein the second real-time current and the second real-time temperature are acquired from the slave end; Obtaining the ambient temperature of the location where the monitored cable is located, wherein the ambient temperature is collected by a host terminal; Performing an electrical fire identification and warning operation according to the second real-time current, the second real-time temperature and the ambient temperature; The second real-time current, the second real-time temperature and the ambient temperature that are determined to be abnormal by the predicted operation are uploaded to the data background so that the data background issues an alarm reminder.

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