Distributed optical fiber temperature measurement host data interaction method based on virtual area temperature sensor

Abstract

The invention relates to a distributed optical fiber temperature measurement host data interaction method based on a virtual area temperature sensor, and belongs to the field of coal mine production safety monitoring. According to the method, temperature measurement belts corresponding to a plurality of channels of an optical fiber temperature measurement host are divided into a plurality of areas according to a preset length, and the temperature measurement belt corresponding to each area is virtualized as a virtual area temperature sensor; transmitting temperature data corresponding to all channels of the temperature measurement host to a server through a switch in a form of replacing a belt type environment temperature parameter with a single-point environment temperature parameter; the temperature data transmitted to the temperature measurement host or the server by the virtual area temperature sensors at least comprise self address numbers, alarm identifiers and temperature values, and the server or the temperature measurement host controls the starting and stopping states of the water sprinkling and spraying valve groups in the corresponding areas according to the temperature data transmitted by each virtual area temperature sensor. According to the invention, the temperature measurement host is virtualized into the regional temperature sensor, and a large amount of temperature data does not need to be uploaded to the server, so that network resources and hardware resources are saved.

Description

Technical Field

[0001] The invention belongs to the field of coal mine production safety monitoring and relates to a distributed optical fiber temperature measurement host data interaction method based on a virtual area temperature sensor. Background Art

[0002] In modern coal mines, due to the continuous improvement of various operating procedures and the continuous improvement of the degree of mine automation, the proportion of open flames and gunfires in the statistics of fire accident causes has become smaller and smaller, and mine electrical fire prevention has become the top priority of mine fire prevention. According to the special structure of coal mines, the occurrence of electrical fires is often extremely concealed in the early stage. Cables are widely used in mines as a necessity to ensure the stability of coal mine production power supply systems. In view of the particularity of underground coal mine workplaces, mining cables have strict product standards and requirements, but cables are widely distributed, and the structure of coal mine tunnels is complex. Once the cable temperature is locally too high, it will cause a fire, which is extremely harmful. Therefore, it is necessary to use a temperature sensor to measure the temperature of the cable in operation. However, the traditional temperature measurement method is based on electrical signals. Due to the particularity of the mine environment, safety problems are prone to occur and the accuracy of temperature measurement will be greatly affected. In addition, there are shortcomings such as complex wiring, easy damage, large maintenance work, and small measurement range.

[0003] In response to the above problems, a distributed fiber optic temperature measurement host is currently used to measure the temperature underground in coal mines. Distributed fiber optic temperature measurement hosts are used to monitor the working environment temperature underground in mines, issue fire warnings, etc., and are often used in mine goafs and belt conveyor areas. The fiber optic temperature measurement host is different from conventional sensors such as methane, carbon monoxide, oxygen, and temperature sensors. The former is a single-point environmental parameter measurement instrument, and the latter is a belt-type environmental temperature parameter measurement instrument. The fiber optic temperature measurement host contains several channels, each of which is connected to a temperature measurement optical fiber, corresponding to a temperature measurement belt. Depending on the length of the light, the maximum length of each temperature measurement belt can be up to 10 kilometers.

[0004] The current fiber optic temperature measurement host transmits data to the switch through the Ethernet interface, and then the switch uploads it to the ground server. The ground server receives a large amount of temperature data from the temperature measurement tape sent by the fiber optic temperature measurement host and displays the temperature data in the form of a dynamic waveform. However, when the current fiber optic temperature measurement host is used in coal mines, the interaction with the server monitoring software is complex and the amount of communication data is extremely large. The host is not connected to the backend server monitoring software as a sensor according to the same conventional protocol as other sensors, and the server monitoring software requires complex parameter configuration and temperature data storage functions for the fiber optic temperature measurement host. A large amount of temperature data is stored on the server monitoring software platform, and processing increases the load on the server. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a distributed optical fiber temperature measurement host data interaction method based on a virtual area temperature sensor.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A distributed optical fiber temperature measurement host data interaction method based on virtual area temperature sensors divides the temperature measurement belts corresponding to several channels of the optical fiber temperature measurement host into several areas according to preset lengths, and virtualizes the temperature measurement belt corresponding to each area as a virtual area temperature sensor, and transmits the temperature data corresponding to all channels of the optical fiber temperature measurement host to the server through a switch in the form of single-point ambient temperature parameters instead of belt-type ambient temperature parameters, wherein each virtual area temperature sensor is allocated a storage area, and the storage area is used to store the basic parameters and temperature parameters of the corresponding virtual area temperature sensor.

[0008] The temperature data transmitted by the virtual area temperature sensor to the optical fiber temperature measurement host or server includes at least its own address number, alarm mark and temperature value. The server or optical fiber temperature measurement host controls the start and stop status of the sprinkler valve group in the corresponding area according to the temperature data transmitted by each virtual area temperature sensor.

[0009] Furthermore, for an optical fiber temperature measurement host with N channels, the length of the temperature measurement band of the nth channel is L n , the preset length is Δl, then the temperature measurement band of the nth channel will be virtualized as X n virtual zone temperature sensors, ,in, means rounding up, then for each virtual area temperature sensor in the nth channel, it is recorded as Where n∈[1,N], n is a positive integer, i∈[1,X n ], i is a positive integer.

[0010] Furthermore, the basic parameters stored in the storage area of ​​the virtual area temperature sensor include the address number, alarm threshold, and power-off value of the corresponding virtual area temperature sensor; the temperature parameters include the temperature values ​​measured at all temperature measurement points in the corresponding area.

[0011] Furthermore, each virtual area temperature sensor determines the temperature value of the area based on the temperature point values ​​fed back from the temperature measuring points in the area. The method is as follows: define the temperature value Ts of the virtual area temperature sensor as the highest temperature value of each area temperature zone, find the maximum temperature value Tmax among all the temperature measuring point values ​​in the area, assign the value of Tmax to Ts, and Ts is the current temperature value of the virtual area temperature sensor.

[0012] Furthermore, each virtual area temperature sensor defines a temperature value Ts of the virtual area temperature sensor according to a sliding filter and mean filter algorithm:

[0013] Assume that the sliding window size is H, and the optical fiber temperature measurement host allocates a buffer of length H to each partition;

[0014] When the optical fiber temperature measurement host collects the temperature of all temperature measurement points in the partition each time, it determines the highest temperature value Tmax of the temperature measurement point in the partition and fills Tmax into the buffer in a first-come-first-served manner;

[0015] When the Buffer is full, return the average value of the accumulated sum of the entire Buffer array;

[0016] Buffer is used as a sliding window. After the new Tmax is filled in, an array is formed. The average value V of the accumulated sum of the elements of the entire Buffer array is assigned to Ts as the real-time temperature value of the current partition temperature.

[0017] Furthermore, in terms of message format, the message format sent by the virtual area temperature sensor to the optical fiber temperature measurement host or server is consistent with the message format of the single-point sensor.

[0018] Furthermore, when the server requests data from the virtual area temperature sensor, the optical fiber temperature measurement host immediately obtains the temperature value of the corresponding virtual area temperature sensor after receiving the request message sent by the server, and sends the temperature values ​​of each virtual area temperature sensor to the server in turn to complete the real-time data upload.

[0019] Furthermore, when a fire hazard occurs in the tunnel area monitored by the virtual area temperature sensor, when the authority to issue control commands is on the server side, the real-time temperature value of the virtual area temperature sensor, that is, the maximum ambient temperature value of the area, is uploaded to the server together with the alarm mark; after receiving it, the server determines whether the ambient temperature of the area exceeds the limit based on the alarm mark. If it exceeds the limit, a fire extinguishing instruction for the sprinkler valve group is issued to open all the valve groups in the corresponding area for fire extinguishing; after the sprinkler valve group corresponding to the tunnel area is opened, when the server detects that the alarm mark of the virtual area temperature sensor is cancelled, an instruction to close the sprinkler valve group is sent to control the sprinkler valve group to close.

[0020] Furthermore, when a fire hazard occurs in the tunnel area monitored by the virtual area temperature sensor, when the authority to issue control commands lies with the fiber optic temperature measurement host, the fiber optic temperature measurement host monitors the status of the virtual area temperature sensor in real time instead of the substation, and when an alarm mark appears on the virtual area temperature sensor, it immediately issues a command to open the sprinkler valve group to release water; when the fiber optic temperature measurement host finds that the alarm mark of the virtual area temperature sensor disappears, it issues a command to close the sprinkler valve group.

[0021] The beneficial effects of the present invention are:

[0022] The present invention virtualizes the temperature measuring host as a regional temperature sensor, and does not need to upload a large amount of temperature data to the background server monitoring software, saving network resources and hardware resources. Based on the present invention, from the perspective of the server monitoring software, the temperature measuring host is shielded, and only the virtual regional temperature sensor can be seen, with the same parameter configuration and interaction mode as other temperature sensors, which is convenient for regulating data.

[0023] In the present invention, the temperature measuring host is abstracted into multiple regional temperature sensors, and all parameter configurations are set in the host human-computer interaction interface, without the need for the server to perform special settings on its internal parameters. At the same time, the belt temperature measurement principle of the temperature measuring host is converted into a point temperature measurement mode, using points instead of regions to facilitate logical processing.

[0024] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0026] Figure 1 This is the network topology diagram of the traditional coal mine safety monitoring system;

[0027] Figure 2 A network topology diagram for converting a temperature host into a virtual area temperature sensor according to the present invention;

[0028] Figure 3 This is a simplified structural diagram of the optical fiber temperature measurement host of the present invention virtualized as a regional temperature sensor. DETAILED DESCRIPTION

[0029] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0030] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0031] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0032] See also Figure 2-3 , which is a distributed optical fiber temperature measurement host data interaction method based on virtual area temperature sensor.

[0033] Example 1

[0034] like Figure 1 The network topology diagram of a traditional coal mine safety monitoring system is shown in FIG. The traditional coal mine safety monitoring system includes several substations, such as Figure 1In the substations A, B and C shown, several identical or different sensors are set under each substation. For example, substation A is equipped with a start / stop sensor, an alarm, a level sensor, a temperature sensor, a water level sensor, etc., substation B is equipped with a methane sensor, an oxygen sensor, a smoke sensor, a temperature sensor, a pressure sensor, etc., and substation C is equipped with a pipeline flow meter, a wind speed sensor, a smoke sensor, a temperature sensor, a pressure sensor, etc. Each substation then transmits the data obtained by various sensors to the server for processing through the corresponding switch. Various sensors upload the collected environmental parameter information or equipment and personnel status information to the substation through 485 communication. The substation sends the relevant message to the switch through Ethernet, and the switch sends the information to the ground server through the optical fiber ring network. The coal mine safety monitoring system installed on the server is used to collect monitoring parameter information of various sensors in the mine and various information such as equipment status and personnel location.

[0035] The current fiber optic temperature measurement host transmits data to the switch through the Ethernet interface, and then the switch uploads it to the ground server. The ground server receives a large amount of temperature data of the temperature measuring tape sent by the fiber optic temperature measurement host and displays the temperature data in the form of a dynamic waveform. The fiber optic temperature measurement host is different from conventional sensors such as methane, carbon monoxide, oxygen, and temperature sensors. The former is a belt-type environmental temperature parameter measurement instrument, and the latter is a single-point environmental parameter measurement instrument. The fiber optic temperature measurement host contains several channels, each of which is connected to a temperature measuring optical fiber, corresponding to a temperature measuring tape. According to the laying length of the light, the maximum length of each temperature measuring tape can be up to 10 kilometers. A large amount of temperature data is stored on the server monitoring software platform, and the processing causes an increase in the server load.

[0036] Based on this, this embodiment proposes a distributed optical fiber temperature measurement host data interaction method based on a virtual area temperature sensor, such as Figure 2 As shown, the temperature measuring belts corresponding to several channels of the optical fiber temperature measuring host are divided into several areas according to preset lengths, and the temperature measuring belt corresponding to each area is virtualized as a virtual area temperature sensor, and the temperature data corresponding to all channels of the optical fiber temperature measuring host are transmitted to the server through the switch in the form of single-point ambient temperature parameters instead of belt-type ambient temperature parameters, wherein each virtual area temperature sensor is allocated a storage area, which is used to store the basic parameters and temperature parameters of the corresponding virtual area temperature sensor.

[0037] The present invention virtualizes the optical fiber temperature measurement host into multiple virtual regional temperature sensors. Each virtual virtual regional temperature sensor has the same message interaction as the current temperature sensor and the server monitoring platform software. The message format is similar to other commonly used sensors and can be compatible with the server monitoring platform software. From the perspective of the server monitoring platform software, the optical fiber temperature measurement host cannot be seen, only the virtual virtual regional temperature sensor can be seen. This operation avoids uploading a large amount of temperature data from the optical fiber temperature measurement host to the server background and performing unnecessary logical processing functions.

[0038] Specifically, for an optical fiber temperature measurement host with N channels, the length of the temperature measurement band of the nth channel is L n , the preset length is Δl, then the temperature measurement band of the nth channel will be virtualized as X n virtual zone temperature sensors, ,in, means rounding up, then for each virtual area temperature sensor in the nth channel, it is recorded as Where n∈[1,N], n is a positive integer, i∈[1,X n ], i is a positive integer.

[0039] In this embodiment, it is assumed that an optical fiber temperature measurement host has N=4 temperature measurement channels, which are respectively located in 4 lanes, the length of each temperature measurement channel is L=2000m, and the preset length of the division is set to Δl=500m, then each channel is virtualized as 4 virtual regional temperature sensors, a total of 16 virtual regional temperature sensors, and the optical fiber temperature measurement host is virtualized as a plurality of virtual regional temperature sensors. The allocation table is shown in Table 1:

[0040] Table 1

[0041]

[0042]

[0043] Each temperature measurement channel of the optical fiber temperature measurement host is divided into several temperature measurement zones, and each temperature measurement zone is virtualized as a virtual regional temperature sensor. As shown in the table above, channel 1 of the optical fiber temperature measurement host is divided into four zones, with one zone divided every 500m, corresponding to virtual regional temperature sensors 1-4. The entire optical fiber temperature measurement host is virtualized as 16 virtual regional temperature sensors.

[0044] Each virtual area temperature sensor is assigned a storage area to store the basic parameters of the sensor such as address number, alarm threshold value, power-off value, etc.

[0045] Define the temperature value Ts of the virtual regional temperature sensor as the highest temperature value of each regional temperature zone. For example, if the length of region 1 is 500m, and there are 1000 temperature measurement points at a 0.2m interval. The storage area is also used to save the temperature data of each temperature measurement point. Among the 1000 temperature measurement points, find the maximum temperature value Tmax, assign the value of Tmax to Ts, and Ts represents the current temperature value of the virtual regional temperature sensor.

[0046] When the server platform software requests data from the virtual area temperature sensor, the optical fiber temperature measurement host immediately obtains the current value Ts (i.e., the highest temperature value of the temperature zone in the area) of the corresponding virtual area temperature sensor after receiving the message sent by the platform software, and sends the values ​​of each virtual area temperature sensor to the server platform software in turn to complete the real-time data upload. Each virtual area temperature sensor corresponds to a unique address number. The message sent by the optical fiber temperature measurement host to the server platform software contains at least the address number and temperature value of the current virtual area temperature sensor, alarm identification and other key information, so that the platform software can distinguish them.

[0047] like Figure 3 As shown in the figure, when a fire hazard occurs in the tunnel area monitored by the virtual area temperature sensor, when the authority to issue the control command is on the server side, the real-time value of the virtual area temperature sensor, that is, the maximum ambient temperature value of the area, is uploaded to the server platform software together with the alarm mark. After receiving it, the server platform software determines whether the ambient temperature of the area exceeds the limit according to the alarm mark. If it exceeds the limit, it issues a fire extinguishing instruction for the sprinkler valve group, opens all the valve groups in the corresponding area, and performs fire extinguishing. After the sprinkler valve group in the corresponding tunnel area is opened, when the server platform software detects that the alarm mark of the virtual area temperature sensor is cancelled (indicating that the ambient temperature has returned to normal), it sends an instruction to close the valve group, controls the valve group to close, and completes the fire extinguishing.

[0048] When the authority to issue control commands lies with the fiber optic temperature measurement host, the fiber optic temperature measurement host monitors the status of the virtual area temperature sensor in real time instead of the substation. When a high temperature alarm is found in the virtual area temperature sensor, it immediately issues a command to open the sprinkler valve group to release water to achieve the fire extinguishing function. This process does not require the participation of the host server.

[0049] Example 2

[0050] The difference between this embodiment and Embodiment 1 is that this embodiment adopts a sliding filter and mean filter algorithm to define the temperature value Ts of the virtual area temperature sensor.

[0051] Since the virtual regional temperature sensor collects the highest temperature of the entire regional temperature zone, it may fluctuate greatly at a certain moment. In order to stabilize the output temperature value, a sliding filter and mean filter algorithm is used:

[0052] Assume that the size of a sliding window is H, and the fiber optic temperature measurement host allocates a cache Buffer of length H to each partition. When the fiber optic temperature measurement host collects the temperature of all temperature measurement points in the partition each time, it determines the highest temperature value Tmax of the temperature measurement points in the partition, and fills Tmax into the Buffer in a first-come, first-served manner. After the Buffer is filled, the average value of the cumulative sum of the entire Buffer array is returned. The Buffer is used as a sliding window. After the new Tmax is filled, an array is formed. The average value V of the cumulative sum of the elements of the entire Buffer array is assigned to Ts as the real-time value of the current partition temperature. After this processing, a certain instantaneous high temperature value of the regional temperature sensor will be filtered to avoid triggering unnecessary alarm signals due to large fluctuations in the temperature signal.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A distributed optical fiber temperature measurement host data interaction method based on a virtual area temperature sensor, characterized in that: It divides the temperature measuring belts corresponding to several channels of the optical fiber temperature measuring host into several areas according to preset lengths, and virtualizes the temperature measuring belt corresponding to each area into a virtual area temperature sensor, and transmits the temperature data corresponding to all channels of the optical fiber temperature measuring host to the server through the switch in the form of single-point ambient temperature parameters instead of belt-type ambient temperature parameters, wherein each virtual area temperature sensor is allocated a storage area, which is used to store the basic parameters and temperature parameters of the corresponding virtual area temperature sensor; The temperature data transmitted by the virtual area temperature sensor to the optical fiber temperature measurement host or server includes at least its own address number, alarm mark and temperature value. The server or optical fiber temperature measurement host controls the start and stop status of the sprinkler valve group in the corresponding area according to the temperature data transmitted by each virtual area temperature sensor.

2. The distributed optical fiber temperature measurement host data interaction method based on virtual area temperature sensor according to claim 1 is characterized in that: For a fiber optic temperature measurement host with N channels, the length of the temperature measurement band of the nth channel is L n , the preset length is Δl, then the temperature measurement band of the nth channel will be virtualized as X n virtual zone temperature sensors, in, means rounding up, then for each virtual area temperature sensor in the nth channel, it is recorded as Where n∈[1,N], n is a positive integer, i∈[1,X n ], i is a positive integer.

3. The distributed optical fiber temperature measurement host data interaction method based on virtual area temperature sensor according to claim 1 is characterized in that: The basic parameters stored in the storage area of ​​the virtual area temperature sensor include the address number, alarm threshold, and power-off value of the corresponding virtual area temperature sensor; the temperature parameters include the temperature values ​​measured at all temperature measurement points in the corresponding area.

4. The distributed optical fiber temperature measurement host data interaction method based on virtual area temperature sensor according to claim 3 is characterized in that: Each virtual area temperature sensor determines the temperature value of the area based on the temperature point values ​​fed back from the temperature measuring points in the area. The method is as follows: define the temperature value Ts of the virtual area temperature sensor as the highest temperature value of each area temperature zone, find the maximum temperature value Tmax among all the temperature measuring point values ​​in the area, assign the value of Tmax to Ts, and Ts is the current temperature value of the virtual area temperature sensor.

5. The distributed optical fiber temperature measurement host data interaction method based on virtual area temperature sensor according to claim 3 is characterized in that: Each virtual area temperature sensor defines the temperature value Ts of the virtual area temperature sensor according to the sliding filter and mean filter algorithm: Assume that the sliding window size is H, and the optical fiber temperature measurement host allocates a buffer of length H to each partition; When the optical fiber temperature measurement host collects the temperature of all temperature measurement points in the partition each time, it determines the highest temperature value Tmax of the temperature measurement point in the partition and fills Tmax into the buffer in a first-come-first-served manner; When the Buffer is full, return the average value of the accumulated sum of the entire Buffer array; Buffer is used as a sliding window. After the new Tmax is filled in, an array is formed. The average value V of the accumulated sum of the elements of the entire Buffer array is assigned to Ts as the real-time temperature value of the current partition temperature.

6. The distributed optical fiber temperature measurement host data interaction method based on virtual area temperature sensor according to claim 1 is characterized in that: In terms of message format, the message format sent by the virtual area temperature sensor to the optical fiber temperature measurement host or server is consistent with the message format of the single-point sensor.

7. The distributed optical fiber temperature measurement host data interaction method based on virtual area temperature sensor according to claim 1 is characterized in that: When the server requests data from the virtual area temperature sensor, the optical fiber temperature measurement host immediately obtains the temperature value of the corresponding virtual area temperature sensor after receiving the request message sent by the server, and sends the temperature values ​​of each virtual area temperature sensor to the server in turn to complete the real-time data upload.

8. The distributed optical fiber temperature measurement host data interaction method based on virtual area temperature sensor according to claim 1 is characterized in that: When a fire hazard occurs in the lane area monitored by the virtual area temperature sensor, when the authority to issue the control command is on the server side, the real-time temperature value of the virtual area temperature sensor, that is, the maximum ambient temperature value of the area, is uploaded to the server together with the alarm mark; After receiving the information, the server determines whether the ambient temperature of the area exceeds the limit based on the alarm mark. If it exceeds the limit, it will issue a fire extinguishing instruction for the sprinkler valve group to open all the valve groups in the corresponding area for fire extinguishing. After the sprinkler valve group in the corresponding alley area is opened, when the server detects that the alarm mark of the temperature sensor in the virtual area is cancelled, it will send an instruction to close the sprinkler valve group to control the sprinkler valve group to close.

9. The distributed optical fiber temperature measurement host data interaction method based on virtual area temperature sensor according to claim 1 is characterized in that: When a fire hazard occurs in the tunnel area monitored by the virtual area temperature sensor, and the authority to issue control commands lies with the fiber optic temperature measurement host, the fiber optic temperature measurement host monitors the status of the virtual area temperature sensor in real time instead of the substation. When an alarm mark appears on the virtual area temperature sensor, it immediately issues a command to open the sprinkler valve group to release water; when the fiber optic temperature measurement host finds that the alarm mark of the virtual area temperature sensor disappears, it issues a command to close the sprinkler valve group.

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