Split pre-installation type electrical fire monitoring equipment and method

Abstract

The invention provides a split pre-installation type electrical fire monitoring device and method, and relates to the technical field of electrical fire monitoring. According to the invention, each sensor is installed on a corresponding distribution line; the signal processing unit is installed on a specified distribution line to be monitored; and the connecting base is respectively connected with the sensor and the signal processing unit. During use, firstly, the sensors and the connecting bases are pre-installed in all the distribution lines and are connected, then the distribution line to be monitored is specified, and the signal processing unit is installed, so that electrical fire monitoring of the specified line is completed; furthermore, a next power distribution line to be monitored can be specified, the signal processing unit is dismounted, the installation position is replaced, and the electrical fire monitoring work of all the power distribution lines is completed step by step. And compared with a single deployment mode of installing a sensor and a signal processing unit in a complete set, the use amount of the signal processing unit is reduced, the dismounting and reinstallation construction cost is reduced, the flexibility is high, and the economical efficiency is good.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical fire monitoring, and in particular to a split pre-installed electrical fire monitoring device and method. Background Art

[0002] Electrical fire monitoring detectors are a type of fire-fighting electronic product defined by parts 2 and 3 of the national standard GB 14287. They are divided into residual current electrical fire monitoring detectors (GB 14287.2) and temperature measurement electrical fire monitoring detectors (GB14287.3). In current market practice, the functions of the two are often integrated together. According to the above national standard definition, the accurate name of the product should be multi-sensor combined electrical fire monitoring detector.

[0003] In the related art, the electrical fire monitoring detector is composed of a sensor (the sensor of the residual current type electrical fire monitoring detector is a residual current transformer, and the sensor of the temperature measurement type electrical fire monitoring detector is a temperature measurement sensor) and a signal processing unit.

[0004] Specifically, in the years of technical and market practice, some technical solutions change the combination of sensors and signal processing units, integrating sensors and signal processing units for easy use, such as patents CN201310182010.7, CN201310182607.1 and CN201310181089.1. In addition, some technical solutions separate the signal processing unit and the housing to enhance the protection of the device body, or limit the wiring, such as patents CN202222592625.4 and CN202221212812.9.

[0005] However, in general, when using electrical fire monitoring detectors to monitor electricity consumption, the original technical solution is to install a set of sensors and signal processing units for each monitored line at the installation location selected by the design, and perform long-term monitoring and alarm for each monitored line. The deployment mode is single and the construction cost is high when dismantling and reinstalling. Summary of the invention

[0006] 1. Technical issues to be solved

[0007] In view of the shortcomings of the prior art, the present invention provides a split pre-installed electrical fire monitoring equipment and method, which solves the technical problems of installing sensors and signal processing units as a set at the installation location selected by the design, performing long-term monitoring and alarm on each monitored line, and having a single deployment mode and high construction cost when dismantling and reinstalling.

[0008] (II) Technical solution

[0009] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0010] A split pre-installed electrical fire monitoring device comprises a plurality of sensors, at least one signal processing unit and a connection base;

[0011] Each of the sensors is installed on a corresponding power distribution line;

[0012] The signal processing unit is installed on a designated distribution line to be monitored among all distribution lines;

[0013] The connecting base is connected to the sensor and the signal processing unit respectively.

[0014] Preferably, the connection base includes a first terminal group, a second terminal group and a structural fastener;

[0015] The first terminal group is connected to the second terminal group, the first terminal group is connected to the sensor, and the second terminal group is connected to the signal processing unit;

[0016] The structural fastener is used for installation on a wall or in a distribution box.

[0017] Preferably, the connection base includes a cover plate;

[0018] The cover plate is installed above the second terminal group and forms a closed cavity with the structural fastener.

[0019] Preferably, the connection base includes a QR code or an NFC tag, and the QR code or the NFC tag is used to complete the device configuration online.

[0020] Preferably, the sensor includes a residual current transformer, and one or a combination of any several of a load current transformer, a voltage sampling line and a temperature detector.

[0021] A split pre-installed electrical fire monitoring method based on the split pre-installed electrical fire monitoring device as described above, characterized in that it comprises:

[0022] Fixing it by means of structural fasteners of the connection base, and after pre-installing the sensors on all the power distribution lines to be monitored, connecting the sensors to the first terminal set of the connection base;

[0023] Specify the distribution circuit to be monitored among all the distribution circuits;

[0024] Installing a signal processing unit on a designated power distribution line and connecting the signal processing unit to a second terminal set of a connection base;

[0025] The connection base and sensors and signal processing units on the designated distribution line are used to monitor electrical fires on the designated distribution line, and based on the monitoring results, risk warnings are issued and / or management and control suggestions are provided.

[0026] Preferably, the split pre-installed electrical fire monitoring method comprises:

[0027] Remove the signal processing unit on the currently designated distribution line, reinstall the cover plate connected to the base, and designate the next distribution line to be monitored. Remove the cover plate connected to the base on the new designated distribution line and install the signal processing unit. Perform electrical fire monitoring on the new designated distribution line, and repeat the above operation until all distribution lines have been traversed.

[0028] Preferably, the power distribution line is a single-phase line or a three-phase line, and sensors are pre-installed on all power distribution lines; including:

[0029] (1) When the sensor is a residual current transformer, each residual current transformer is used to sheath the live wire and the neutral wire or the three-phase phase wire and the neutral wire of the distribution line, and the signal wire of the residual current transformer is connected to the first terminal group;

[0030] (2) When the sensor is a residual current transformer, or one or a combination of a load current transformer, a voltage sampling line, and a temperature detector, each residual current transformer is used to sheath the live wire and the neutral wire or the three-phase phase wire and the neutral wire of the distribution line;

[0031] and using each load current transformer to sheath the live wire or three-phase wire of the distribution line, connecting the voltage sampling line to the wiring terminal of the live wire or three-phase wire of the distribution line, and tying the temperature detector near the wiring terminal of the distribution line;

[0032] And connect the signal wires of all the above sensors to the first terminal group.

[0033] Preferably, a distribution line to be monitored is designated among all distribution lines; including:

[0034] (1) When all distribution lines are of the same level and there is a superior line, the distribution line to be monitored is designated among all distribution lines based on the electrical fire monitoring results of the superior line; or

[0035] (2) Conduct a preliminary electrical fire inspection of all distribution lines and, based on the inspection results, designate those distribution lines to be monitored among all distribution lines; or

[0036] (3) Conduct preliminary investigations on all distribution lines and, based on the investigation results, designate the distribution lines to be monitored among all distribution lines.

[0037] Preferably, the designated power distribution line is monitored for electrical fires; comprising:

[0038] (1) When the sensor is a residual current transformer, residual current over-threshold monitoring is performed based on the signal processing unit;

[0039] (2) When the sensor is a residual current transformer, a load current transformer, or a voltage sampling line, the signal processing unit performs residual current over-threshold monitoring, and one or a combination of DC component monitoring, non-intrusive load identification, and resistive leakage component monitoring;

[0040] (3) When the sensor is a residual current transformer and a temperature detector, residual current over-threshold monitoring and over-temperature warning monitoring are respectively performed based on the signal processing unit;

[0041] (4) When the sensor is a residual current transformer, a load current transformer, a voltage sampling line and a temperature detector, the signal processing unit is used to respectively perform residual current over-threshold monitoring, DC component monitoring, non-intrusive load identification, one or a combination of several items of resistive leakage component monitoring, and over-temperature early warning monitoring.

[0042] (III) Beneficial effects

[0043] The present invention provides a split pre-installed electrical fire monitoring device and method. Compared with the prior art, it has the following beneficial effects:

[0044] The present invention includes a plurality of sensors, at least one signal processing unit and a connection base; each sensor is installed on a corresponding distribution line; the signal processing unit is installed on a designated distribution line to be monitored among all distribution lines; the connection base is connected to the sensor and the signal processing unit, respectively. When in use, firstly, the sensor and the connection base are pre-installed in all distribution lines and the two are connected, then the distribution line to be monitored is designated and the signal processing unit is installed to complete the electrical fire monitoring of the designated line; further, the next distribution line to be monitored can be designated, the signal processing unit is removed and the installation position is changed, and the electrical fire monitoring of all distribution lines is completed in steps. Compared with the single deployment mode of installing sensors and signal processing units as a set, the use of signal processing units is reduced, the construction costs of removal and reinstallation are reduced, and the flexibility is high and the economy is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0046] Figure 1 A schematic diagram of the structure of a split pre-installed electrical fire monitoring device provided by an embodiment of the present invention;

[0047] Figure 2 A structural schematic diagram of a connection base provided in an embodiment of the present invention (without a cover plate);

[0048] Figure 3 A structural schematic diagram of a connection base (with a cover plate) provided in an embodiment of the present invention;

[0049] Figure 4 A flow chart of a split pre-installed electrical fire monitoring method provided by an embodiment of the present invention;

[0050] Figure 5 A flow chart of another split pre-installed electrical fire monitoring method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] The embodiment of the present application provides a split pre-installed electrical fire monitoring device and method, which solves the technical problems of installing sensors and signal processing units as a set at the installation location selected by the design, performing long-term monitoring and alarm on each monitored line, and having a single deployment mode and high construction cost when dismantling and reinstalling. It greatly reduces the use of signal processing units in the electricity monitoring solution and significantly improves the economy of the step-by-step precise monitoring deployment method of electrical fire monitoring detectors.

[0053] The technical solution in the embodiment of the present application is to solve the above technical problems, and the overall idea is as follows:

[0054] The split pre-installed electrical fire monitoring equipment provided in an embodiment of the present invention includes a plurality of sensors, at least one signal processing unit and a connecting base; each sensor is installed on a corresponding distribution line; the signal processing unit is installed on a designated distribution line to be monitored among all distribution lines; and the connecting base is connected to the sensor and the signal processing unit respectively.

[0055] When in use, first pre-install the sensor and the connection base in all distribution lines and connect the two, then specify the distribution line to be monitored and install the signal processing unit to complete the electrical fire monitoring of the specified line.

[0056] Furthermore, the next distribution line to be monitored can be designated, the signal processing unit can be removed and replaced, and the electrical fire monitoring work of all distribution lines can be completed in steps.

[0057] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0058] Embodiment 1:

[0059] like Figure 1 As shown, an embodiment of the present invention provides a split pre-installed electrical fire monitoring device, including a plurality of sensors, at least one signal processing unit and a connection base.

[0060] Each of the sensors is installed on a corresponding power distribution line.

[0061] The signal processing unit is installed on a designated distribution line to be monitored among all distribution lines.

[0062] The connecting base is connected to the sensor and the signal processing unit respectively.

[0063] Compared with a single deployment mode of installing a complete set of sensors and signal processing units, the embodiment of the present invention reduces the usage of signal processing units, reduces the construction costs of removal and reinstallation, and has high flexibility and good economy.

[0064] In an optional embodiment, if Figure 2 As shown, the connection base includes a first terminal group, a second terminal group and a structural fastener.

[0065] The first terminal group is connected to the second terminal group. The first terminal group is connected to a sensor, and the second terminal group is connected to a signal processing unit.

[0066] For example, Figure 2As shown, the first terminal group can be designed in a modular manner, and is specifically arranged in two upper and lower rows in parallel; the second terminal group adopts an integral plug-in design, and is located between the two rows of first terminal groups.

[0067] The structural fastener is used for installation on a wall or in a distribution box.

[0068] For example, Figure 2 As shown, the structural fasteners can be fixed by screws.

[0069] Further, such as Figure 3 As shown, the connecting base also includes a cover plate.

[0070] The cover plate is installed above the second terminal group and forms a closed cavity with the structural fastener, which is used to prevent dust and water when the signal processing unit is not installed and protect the second terminal group.

[0071] Furthermore, the connection base also includes a QR code or an NFC tag, and the QR code or the NFC tag is used to complete the device configuration online.

[0072] In an optional implementation, the sensor includes a residual current transformer, and one or a combination of any several of a load current transformer, a voltage sampling line, and a temperature detector.

[0073] It should be noted that the sensor includes at least a residual current transformer, otherwise it cannot meet the functional requirements of the national standard GB14287.2 "Residual Current Electrical Fire Monitoring Detector" of this product.

[0074] Embodiment 2:

[0075] like Figure 4 As shown, the embodiment of the present invention provides a split pre-installed electrical fire monitoring method based on the split pre-installed electrical fire monitoring device described in Embodiment 1, comprising:

[0076] S1. Fix the connection base by means of structural fasteners, and after pre-installing sensors on all distribution lines to be monitored, connect the sensors to the first terminal group of the connection base.

[0077] S2. Specify the distribution lines to be monitored among all distribution lines.

[0078] S3. Install a signal processing unit on a designated power distribution line, and connect the signal processing unit to a second terminal group of a connection base.

[0079] S4. Utilize the connection base and sensors and signal processing units on the designated distribution line to monitor electrical fires on the designated distribution line, and issue risk warnings and / or provide management and control suggestions based on the monitoring results.

[0080] Under the premise that the number of signal processing units is limited, the embodiment of the present invention designates one or some of the more dangerous or more important distribution lines to be monitored for priority electrical fire monitoring, which can improve the targeted allocation of resources for electrical safety hazard management and improve the overall efficiency of electrical safety management.

[0081] In an optional embodiment, if Figure 5 As shown, the split pre-installed electrical fire monitoring method provided by the embodiment of the present invention also includes:

[0082] S5. Remove the signal processing unit on the currently designated distribution line, reinstall the cover plate connected to the base, and designate the next distribution line to be monitored. Remove the cover plate connected to the base on the new designated distribution line and install the signal processing unit. Perform electrical fire monitoring on the new designated distribution line, and repeat the above operation until all distribution lines are traversed.

[0083] The embodiment of the present invention completes the monitoring of all distribution lines in steps. It is a deployment mode of electrical fire monitoring equipment that reduces the initial construction cost at the expense of increasing the operation and maintenance cost. It is suitable for user units with tight construction funds but strong operation and maintenance capabilities. Based on the innovative structure of the above-mentioned split pre-installed electrical fire monitoring equipment, the construction cost of the dismantling and reinstallation link of the step-by-step monitoring deployment mode can be significantly reduced, thereby improving the economic efficiency.

[0084] In an optional embodiment, the base is fixed by means of structural fasteners connected to it in step S1, and its fixing position may be on a wall or in a distribution box body, and no unique limitation is made here.

[0085] In addition, if the power distribution line is a single-phase line or a three-phase line, then the sensors are pre-installed on all power distribution lines in step S1; including:

[0086] (1) When the sensor is a residual current transformer, each residual current transformer is used to sheath the live wire and the neutral wire or the three-phase phase wire and the neutral wire of the distribution line, and the signal wire of the residual current transformer is connected to the first terminal group.

[0087] (2) When the sensor is a residual current transformer, or one or a combination of a load current transformer, a voltage sampling line, and a temperature detector, each residual current transformer is used to sheath the live wire and the neutral wire or the three-phase phase wire and the neutral wire of the distribution line;

[0088] and using each load current transformer to sheath the live wire or three-phase wire of the distribution line, connecting the voltage sampling line to the wiring terminal of the live wire or three-phase wire of the distribution line, and tying the temperature detector near the wiring terminal of the distribution line;

[0089] And connect the signal wires of all the above sensors to the first terminal group.

[0090] In an optional implementation, in step S2, the power distribution lines to be monitored are specified among all the power distribution lines; this can be divided into several typical situations:

[0091] (1) When all distribution lines are of the same level and there is an upper level line, the distribution line to be monitored is designated among all distribution lines based on the electrical fire monitoring results of the upper level line.

[0092] Specifically, existing electrical fire monitoring detectors are installed on the superior distribution lines of all distribution lines (e.g., if all distribution lines are secondary distribution lines of a project, then the superior distribution lines are the primary distribution lines of the project), and the lines that need to be monitored for electrical fire are selected based on the electrical fire monitoring results of the superior distribution lines (e.g., if the primary distribution line monitoring finds that some secondary distribution lines have long-term excessive leakage and alarms, then these lines will be selected).

[0093] (2) Conduct preliminary electrical fire protection inspections on all distribution lines and, based on the inspection results, designate distribution lines to be monitored among all distribution lines.

[0094] Specifically, a round of inspections is carried out (such as fire electrical fire prevention inspections), and the lines that need to be monitored for electrical fires are selected based on the inspection results (if the fire electrical fire prevention inspections reveal that certain lines have electrical safety hazards, then these lines will be selected).

[0095] (3) Conduct preliminary investigations on all distribution lines and, based on the investigation results, designate the distribution lines to be monitored among all distribution lines.

[0096] Specifically, all distribution lines are divided into several groups (for example, if a park regards the distribution lines of each floor as lines to be monitored, then each building or several buildings can be divided into a group). After reasonable sorting (such as sorting by the age of the buildings from long to short, or sorting by power consumption from large to small, etc.), each group will be the distribution line to be monitored in turn.

[0097] In an optional implementation, step S3 may also include starting to configure an online mode of equipment required for power consumption monitoring of a designated distribution line.

[0098] In fact, from the perspective of feasibility, the most basic method of manually selecting or entering the name of the monitored line in the cloud after installation can be adopted, or more specific technical means can be adopted, such as:

[0099] (1) Set a QR code on the connection base and the signal processing unit. After reinstalling the cover of the connection base, scan the code with a mobile phone to complete the device configuration and go online.

[0100] (2) An NFC tag is added to the connection base, and an NFC tag sensing device is added to the signal processing unit. When the signal processing unit and the connection base are powered on and started, the signal processing unit automatically reads the information of the NFC tag on the connection base and automatically completes the device configuration online.

[0101] In an optional implementation, in step S4, electrical fire monitoring is performed on the designated power distribution line. Based on different types of sensors and by selecting a suitable type of signal processing unit, the following monitoring methods may be provided:

[0102] (1) When the sensor is a residual current transformer, residual current over-threshold monitoring is performed based on the signal processing unit.

[0103] (2) When the sensor is a residual current transformer, a load current transformer, or a voltage sampling line, the signal processing unit performs residual current over-threshold monitoring, and one or a combination of DC component monitoring, non-intrusive load identification, and resistive leakage component monitoring. Wherein:

[0104] 1) DC component monitoring: Through the real-time monitoring data of the sensor, the DC component in the specified distribution line is calculated based on the signal processing unit, and a threshold alarm is issued.

[0105] The calculation formula of the DC component of the signal is:

[0106]

[0107] Among them, f D is the DC component of voltage, current or residual current, and f(t) is the time series of the load voltage monitored by the voltage sampling line, the load current monitored by the load current transformer or the residual current monitoring value monitored by the residual current transformer.

[0108] When designing actual products, it is only necessary to filter the corresponding voltage, current, and residual current signals and connect them to a chip with a DC component calculation function, and the DC component data of the line load voltage, load current, and residual current can be obtained at the corresponding output pin.

[0109] It should be noted that the DC component can cause transformer magnetization and vibration, heating of insulation windings of various electrical appliances, accelerate insulation aging, and affect the operation of leakage protection devices, which is an electrical safety hazard. Therefore, the embodiment of the present invention introduces the above DC component monitoring content.

[0110] 2) Non-intrusive load identification: Through real-time monitoring data from sensors, the start and stop of specific electrical equipment (such as voltage regulating sockets, air conditioners, pure resistive heating equipment, etc.) are identified based on the signal processing unit.

[0111] The implementation method is mainly through accurately defining the characteristics of electrical parameter changes at the start and stop moments of specific electrical equipment, specifically the load current signal monitored by the load current transformer, the fundamental and harmonic components obtained after discrete Fourier transform (DFT), the absolute value, extreme value, percentage of change within a few seconds, and other data characteristics, to make real-time judgments on the monitoring data. Due to the variety of judgment methods in the existing technology, there are nearly 500 related papers on "non-invasive load identification" in the past 10 years alone, and this is not the only limitation here.

[0112] It should be noted that the concept of "non-intrusive load monitoring" first appeared in the doctoral thesis "Non-intrusive Power Load Decomposition and Monitoring" of Tianjin University in 2009. The specific methods are divided into two generations:

[0113] The first generation is represented by three papers published by Taiyuan University of Science and Technology and Chongqing University in 2014-2015: "Research on Feature Selection Algorithm for Non-Intrusive Household Power Load Decomposition Based on Lasso", "Research on Non-Intrusive Household Power Load Decomposition Algorithm Based on HSMM", and "Research on Residential Power Load Identification Combining Improved Nearest Neighbor Method and Support Vector Machine". Some of them use integer programming algorithms, and some use decomposition algorithms based on Hidden Semi-Markov Model (HSMM). However, the key lies in the understanding and definition of the relatively simple scenario load characteristics of residential power load, and the reasonable K value clustering, without the use of deep learning.

[0114] The starting point of the second generation of technology was a paper in 2016, "Application of RPROP Neural Network in Non-Intrusive Load Decomposition", jointly published by a Xuchang company and Wuhan University. It was the first time that elastic BP neural network (RPROP) was used in the field of non-intrusive load monitoring, which set a precedent for the subsequent integration of more deep learning technologies into this field. By 2017, Huazhong University of Science and Technology and Hefei University of Technology had begun to publish degree theses that clearly used deep learning methods for non-intrusive load monitoring.

[0115] 3) Resistive leakage component monitoring: Through the real-time monitoring data of the sensor, the resistive leakage component (also known as resistive residual power) in the specified distribution line is calculated based on the signal processing unit.

[0116] The calculation formula for the resistive leakage component is:

[0117] In a single-phase line, Where P X is the single-phase resistive residual power, U is the live line voltage, I s is the residual current, For U and I s The phase angle difference.

[0118] In a three-phase line, P X′ =U a I s |cosA|+U b I s |cosB|+U c I s |cosC|, where P X′ is the three-phase resistive residual power, U a , U b , U c are the voltages of the three-phase lines, I s is the residual current, A, B, C correspond to U a , U b , U c with I S The phase angle difference.

[0119] In actual product design, the signal processing unit uses the residual current signal monitored by the residual current transformer instead of the load current signal, and inputs it into the electric energy metering chip together with the voltage signal monitored by the voltage sampling line. The resistive residual power is obtained at the chip pin that originally (according to the original design intention of the electric energy metering chip) obtains the active power, and the residual active energy (resistive leakage energy) of a certain period of time can be further obtained through an integrator. The unit power consumption corresponding to the resistive leakage energy formed by dividing the residual active energy of the distribution line in a certain period of time by the demand (average apparent power) of the line in this period of time can correspond well to the actual fire risk of the line, and this indicator can be used to rank the degree of electrical safety hazards of the line or to issue threshold alarms.

[0120] (3) When the sensor is a residual current transformer and a temperature detector, residual current over-threshold monitoring and over-temperature warning monitoring are respectively performed based on the signal processing unit.

[0121] (4) When the sensor is a residual current transformer, a load current transformer, a voltage sampling line and a temperature detector, the signal processing unit is used to respectively perform residual current over-threshold monitoring, DC component monitoring, non-intrusive load identification, one or a combination of several items of resistive leakage component monitoring, and over-temperature early warning monitoring.

[0122] It can be understood that the signal processing unit in the embodiment of the present invention can select a chip with a simple circuit structure and a single function (such as ATT7022EU), or it can select a chip that supports more advanced intelligent functions, increase the circuit structure, and integrate high-level electrical safety hazard monitoring functions that traditional electrical fire monitoring detectors cannot integrate. There is no unique limitation here.

[0123] In addition, it should be noted that the split pre-installed electrical fire monitoring method provided in the embodiment of the present invention, which uses step-by-step precise monitoring as a monitoring terminal deployment mode, can reduce initial construction costs at the expense of increasing subsequent operation and maintenance costs. Therefore, it is preferentially suitable for user units with strong electrical operation and maintenance capabilities but relatively tight budgets to implement electrical fire monitoring.

[0124] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0125] 1. Compared with a single deployment mode of installing a complete set of sensors and signal processing units, the embodiment of the present invention reduces the usage of signal processing units, has high flexibility and good economy.

[0126] 2. In the embodiment of the present invention, the cover plate is installed above the second terminal group and short-circuited with the signal line of the transformer to ensure that the transformer is not in an open circuit state when it is not connected to the signal processing unit through the connection base. In addition, the cover plate and the structural fastener form a closed cavity to protect the plug-in connection surface between the connection base and the signal processing unit, and play a dustproof and waterproof role.

[0127] 3. Under the premise that the number of signal processing units is limited, the embodiment of the present invention designates one or some of the more dangerous or more important distribution lines to be monitored for priority electrical fire monitoring, which can improve the targeted allocation of electrical fire management resources and improve the overall efficiency of electrical safety management work.

[0128] 4. The embodiment of the present invention is based on the innovative structure of the above-mentioned split pre-installed electrical fire monitoring equipment, which can significantly reduce the construction cost of the dismantling and reinstallation links of the step-by-step monitoring deployment mode and improve economic efficiency.

[0129] 5. The signal processing unit in the embodiment of the present invention can be a chip with a simple circuit structure and a single function, or a chip that supports more advanced intelligent functions, increase the circuit structure, and integrate high-level electrical safety hazard monitoring functions that traditional electrical fire monitoring detectors cannot integrate.

[0130] 6. Since the proportion of equipment hardware cost in the total cost is much lower than that of construction cost and operation and maintenance fee, and considering that the number of signal processing units is small, the cost difference between the two different options has almost negligible impact on the economic efficiency of the solution. Therefore, considering the possible functional upgrade of the signal processing unit, the embodiment of the present invention can enable users to obtain greater functional benefits at a lower cost.

[0131] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0132] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A split pre-installed electrical fire monitoring device, characterized in that: It includes several sensors, at least one signal processing unit and a connection base; Each of the sensors is installed on a corresponding power distribution line; The signal processing unit is installed on a designated distribution line to be monitored among all distribution lines; The connecting base is connected to the sensor and the signal processing unit respectively.

2. The split pre-installed electrical fire monitoring device according to claim 1, characterized in that: The connection base includes a first terminal group, a second terminal group and a structural fastener; The first terminal group is connected to the second terminal group, the first terminal group is connected to the sensor, and the second terminal group is connected to the signal processing unit; The structural fastener is used for installation on a wall or in a distribution box.

3. The split pre-installed electrical fire monitoring device according to claim 2, characterized in that: The connecting base includes a cover plate; The cover plate is installed above the second terminal group and forms a closed cavity with the structural fastener.

4. The split pre-installed electrical fire monitoring device according to claim 1, characterized in that: The connection base includes a QR code or an NFC tag, and the QR code or the NFC tag is used to complete the device configuration online.

5. The split pre-installed electrical fire monitoring device according to claim 1, characterized in that: The sensor includes a residual current transformer, and one or a combination of any several of a load current transformer, a voltage sampling line and a temperature detector.

6. A split pre-installed electrical fire monitoring method based on the split pre-installed electrical fire monitoring device according to any one of claims 1 to 5, characterized in that: include: Fixing it by means of structural fasteners of the connection base, and after pre-installing the sensors on all the power distribution lines to be monitored, connecting the sensors to the first terminal set of the connection base; Specify the distribution circuit to be monitored among all the distribution circuits; Installing a signal processing unit on a designated power distribution line and connecting the signal processing unit to a second terminal set of a connection base; The connection base and sensors and signal processing units on the designated distribution line are used to monitor electrical fires on the designated distribution line, and based on the monitoring results, risk warnings are issued and / or management and control suggestions are provided.

7. The split pre-installed electrical fire monitoring method according to claim 6, characterized in that: include: Remove the signal processing unit on the currently designated distribution line, reinstall the cover plate connected to the base, and designate the next distribution line to be monitored. Remove the cover plate connected to the base on the new designated distribution line and install the signal processing unit. Perform electrical fire monitoring on the new designated distribution line, and repeat the above operation until all distribution lines have been traversed.

8. The split pre-installed electrical fire monitoring method according to claim 6, characterized in that: If the power distribution line is a single-phase line or a three-phase line, sensors are pre-installed on all power distribution lines; including: (1) When the sensor is a residual current transformer, each residual current transformer is used to sheath the live wire and the neutral wire or the three-phase phase wire and the neutral wire of the distribution line, and the signal wire of the residual current transformer is connected to the first terminal group; (2) When the sensor is a residual current transformer, or one or a combination of a load current transformer, a voltage sampling line, and a temperature detector, each residual current transformer is used to sheath the live wire and the neutral wire or the three-phase phase wire and the neutral wire of the distribution line; and using each load current transformer to sheath the live wire or three-phase wire of the distribution line, connecting the voltage sampling line to the wiring terminal of the live wire or three-phase wire of the distribution line, and tying the temperature detector near the wiring terminal of the distribution line; And connect the signal wires of all the above sensors to the first terminal group.

9. The split pre-installed electrical fire monitoring method according to claim 6, characterized in that: Specify the distribution circuits to be monitored among all the distribution circuits; including: (1) When all distribution lines are of the same level and there is a superior line, the distribution line to be monitored is designated among all distribution lines based on the electrical fire monitoring results of the superior line; or (2) Conduct a preliminary electrical fire inspection of all distribution lines and, based on the inspection results, designate those distribution lines to be monitored among all distribution lines; or (3) Conduct preliminary investigations on all distribution lines and, based on the investigation results, designate the distribution lines to be monitored among all distribution lines.

10. The split pre-installed electrical fire monitoring method according to claim 6, characterized in that: Conduct electrical fire monitoring on the designated power distribution line; including: (1) When the sensor is a residual current transformer, residual current over-threshold monitoring is performed based on the signal processing unit; (2) When the sensor is a residual current transformer, a load current transformer, or a voltage sampling line, the signal processing unit performs residual current over-threshold monitoring, and one or a combination of DC component monitoring, non-intrusive load identification, and resistive leakage component monitoring; (3) When the sensor is a residual current transformer and a temperature detector, residual current over-threshold monitoring and over-temperature warning monitoring are respectively performed based on the signal processing unit; (4) When the sensor is a residual current transformer, a load current transformer, a voltage sampling line and a temperature detector, the signal processing unit is used to respectively perform residual current over-threshold monitoring, DC component monitoring, non-intrusive load identification, one or a combination of several items of resistive leakage component monitoring, and over-temperature early warning monitoring.

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