Method for evaluating scale, position and structural damage of adherent flame in tunnel fire

Abstract

The invention discloses a method for evaluating the scale, position and structural damage of adherent flames in a tunnel fire, which comprises the following steps of: 1, arranging image type fire detectors on the side wall of a tunnel traffic lane 2.7-3.5 m away from the traffic lane at an interval of 10m so as to measure the flame impact probability P, the flame sizes Lh or Lel and Let and the fire source height Hf; and meanwhile, a temperature sensor is arranged above the side wall of the traffic lane and is used for detecting abnormal temperature conditions and measuring the highest temperature rising value delta T for subsequently calculating the fire source power. The method has the beneficial effects that the impact probability, the fire source height and the flame size of the wall-attached flame can be detected according to the image alarm, the flame is classified and calculated according to the impact probability, the fire source power is evaluated through two modes under each condition, the evaluation results are compared, and the evaluation accuracy is improved. Through the system, the fire position in the tunnel can be found out more accurately and the fire scale can be judged more accurately.

Description

Technical Field

[0001] The present invention relates to the technical field of fire detection in fire safety, and particularly to an evaluation method for the scale, position and structural damage of wall-attached flames in tunnel fires. Background Art

[0002] With the accelerating development of the urbanization process, traffic problems have become urgent problems to be solved in urban management. Highway tunnels play an important role in alleviating traffic pressure because they can make full use of limited planar space and improve road traffic capacity by expanding the vertical dimension. However, the rapid construction and wide application of highway tunnels have also brought new challenges, one of which is the fire hazard caused by traffic accidents in tunnels. In traffic accidents, vehicle spontaneous combustion is a relatively common and highly dangerous problem. The space in the tunnel is relatively enclosed, and after a fire occurs, it is easy to cause the rapid spread of smoke and a sharp rise in temperature, which not only seriously threatens the safety of personnel's lives, but also may damage the tunnel structure. Therefore, the monitoring and rapid response capabilities of tunnel fires have become key factors in ensuring the safe operation of tunnels.

[0003] Currently, fire detection devices are generally arranged above the center line of the tunnel. This layout can cover most areas and meet the basic monitoring requirements under ideal conditions; however, in actual accident scenarios, vehicles usually stay close to the tunnel sidewalls. When a vehicle spontaneous combustion forms a wall-attached fire, due to the fire source being close to the tunnel sidewall, there is a large distance between the detection device above the center line and the fire source, and the monitoring results may have significant deviations. Such deviations will not only lead to misjudgment of the fire scale, but also may delay the start of rescue operations, thereby exacerbating the economic losses, traffic paralysis and personnel casualty risks caused by the fire; in addition, the air flow in the tunnel is complex, and the uncertainty of the heat flow and smoke diffusion paths caused by the fire increases the working difficulty of the detection device; the existing layout method lacks accuracy and sensitivity in dealing with wall-attached fires and cannot provide comprehensive and reliable fire information. Summary of the Invention

[0004] The purpose of the present invention is to provide an evaluation method for the scale, position and structural damage of wall-attached flames in tunnel fires in order to solve the above problems.

[0005] The present invention realizes the above purpose through the following technical solutions:

[0006] An evaluation method for the scale, position and structural damage of wall-attached flames in tunnel fires, which includes the following steps:

[0007] Step 1: Arrange image-type fire detectors on the side wall of the tunnel lane at a height of 2.7 m - 3.5 m from the lane, with an interval of 10 m, to measure the flame impact probability P, the flame size L h or L el and Let , the height of the fire source H f , at the same time, arrange temperature sensors above the side wall of the traffic lane to detect abnormal temperature conditions and measure the maximum temperature increase value ΔT for subsequent calculation of the fire source power;

[0008] Step 2: Obtain the fire source power Q in the signal processor;

[0009] Step 3: Organize the fire source power, fire source height, and flame impact probability obtained in the signal processor, report the information to the monitoring platform, and the monitoring platform conducts a fire scale assessment, classifying it into four levels: general fire, relatively large fire, major fire, and especially major fire, and reporting it level by level.

[0010] Furthermore, the measurement principles for determining the flame height and flame size in Step 1 are as follows: Taking the tunnel height as the standard, calculate the flame size and fire source height in proportion, select the flame height within a certain time period and use the median of the flame height or length within this time period as the flame size at this stage. At the same time, select a part of the area below the ceiling to count the flame images, and the probability of the flame hitting the ceiling can be obtained.

[0011] Furthermore, the setting interval of the image-based fire detector in Step 1 is 10 m to ensure no detection blind area, and the measured fire source height is H f , the flame height is L h , the longitudinal spread length is L el , the longitudinal spread length is L et , and the fire source clearance height H can be obtained through calculation c , Hc = H - H f .

[0012] Furthermore, the calculation formula for the fire source power Q in Step 2 is as follows: Q1 = 27.5(L e + H c ) 5 / 2

[0013] Q2 = 23.5(2L e + H c ) 5 / 2

[0014] Q3 = (ΔTH c ) 3 / 2 / 380

[0015] Q4 = 29L h 5 / 2 ;

[0016] where Q1 is the fire heat release rate calculated based on the longitudinal spread length L el and Q2 is the fire heat release rate calculated based on the transverse spread length Let The calculated heat release rate of the fire, in kW; L el and L et are respectively the longitudinal and transverse horizontal spread lengths below the ceiling, in m; H c is the fire source clearance, in m; Q3 is the heat release rate of the fire calculated based on the increase in ceiling temperature ΔT, and Q4 is the heat release rate of the fire calculated based on the flame height Lh; in kW; ΔT is the increase in ceiling temperature, in K; L h is the flame height, in m;

[0017] After calculation, compare Q1 and Q2, Q3 and Q4 respectively. If the difference is too large, reselect a section of data for calculation until a definite result is obtained.

[0018] Furthermore, in step 3, a signal processor and a signal processing controller are also used when evaluating the fire scale. The signal processor is a fiber grating processor, whose main function is to receive the data output by the temperature sensing cable and the image-type fire detector, calculate the fire source power according to the set calculation system, and statistically transmit the calculated and summarized fire information; the fire alarm controller, whose input end is connected to the signal processor, is used to receive the fire information processed by the signal processor and upload the fire source height, fire source power, and the situation of hitting the ceiling to the monitoring platform.

[0019] Furthermore, the monitoring platform in step 3 is mainly used to receive the fire alarm signal from the fire alarm controller, evaluate the tunnel fire scale, set the alarm threshold, determine the fire scale level, upload it to the fire emergency rescue department for precise extinguishing.

[0020] Furthermore, the specific evaluation process is as follows: First, the temperature sensing cable identifies that there are abnormal situations with relatively high temperatures in some parts. During the identification, the position of the cable where the abnormal situation is measured can be used to obtain on which side of the tunnel the wall-attached fire occurs and its approximate position;

[0021] Then, turn on the image-type fire detector on the other side to identify the flame size, the fire source height H f and the impact probability P, and classify the flame according to the probability P of the flame hitting the ceiling;

[0022] When the probability of the flame hitting the ceiling is greater than or equal to 50%, it indicates that the flame continuously hits the ceiling and radially spreads below the ceiling, forming a ceiling jet. At this time, the fire causes relatively serious damage to the ceiling; at this time, the image-type fire detectors on both sides respectively identify the transverse spread length L et and the longitudinal spread length L el , and use them to calculate the fire source power: the fire source clearance H identified by the image-type fire detector on the opposite side cand the longitudinal spread length L el The lateral spread length Let recognized by the image-type fire detector on the same side and the longitudinal spread length L are input into the signal processor, and the signal processor calculates based on the fire source power calculation system. The calculation formula is as follows:

[0023] Q1 = 27.5(L e + Hc) 5 / 2

[0024] Q2 = 23.5(2L e + H c ) 5 / 2

[0025] Where Q1 is the fire heat release rate calculated based on the longitudinal spread length L el Q2 is the fire heat release rate calculated based on the lateral spread length L et , with the unit of kW; L el and L et are the horizontal spread lengths in the longitudinal and lateral directions below the ceiling respectively, with the unit of m; H c is the fire source clearance, with the unit of m;

[0026] Calculate the average value Q' of Q1 and Q2, and calculate the error of the fire source power calculated using the spread lengths in two directions. The calculation method is as follows:

[0027] Q' = (Q1 + Q2) / 2

[0028] Δ = |Q1 - Q'| / Q'

[0029] If the error is greater than 20%, the image detector is used to reselect the flame images for a period of time and process them, and the spread lengths in two directions are statistically analyzed to recalculate the fire source power; if the error is less than or equal to 20%, it means that the calculated fire source power is credible, and the fire source power Q = Q' is output;

[0030] When the probability of the flame hitting the ceiling is less than 50%, it indicates that the probability of the flame hitting the ceiling is not high, the impact on the ceiling is weak, and the damage to the ceiling is relatively small. At this time, the temperature increase ΔT of the ceiling and the flame height Lh are respectively input into the signal processor, and the signal processor calculates based on the fire source power calculation system. The calculation formula is as follows:

[0031] Q3 = (ΔTHc) 3 / 2 / 380

[0032] Q4 = 29L h 5 / 2

[0033] Where Q3 is the fire heat release rate calculated based on the ceiling temperature rise ΔT, Q4 is the fire heat release rate calculated based on the flame height Lh, the unit is kW; ΔT is the ceiling temperature rise, the unit is K; L h is the flame height, in m; H c is the clearance of fire source, in m.

[0034] Calculate the average value Q' of Q3 and Q4, and calculate the error of the fire source power calculated using the spread length in two directions. The calculation method is as follows:

[0035] Q'=(Q3+Q4) / 2

[0036] Δ=|Q3-Q'| / Q'

[0037] If the error is greater than 20%, and Q3 calculated from the ceiling temperature rise is greater than the flame height L h If the error is greater than 20%, and the Q3 calculated from the ceiling temperature rise is less than the flame height L, then the Q4 calculated from the ceiling temperature rise is re-selected and re-calculated. h The calculated Q4 is judged as a false alarm because the power is small and the temperature change amplitude recognized by the temperature-sensing optical cable is relatively small, and the alarm is lifted; if the error is less than or equal to 20%, it means that the calculated fire source power is credible, and the output fire source power Q = Q';

[0038] Ultimately, all data is transmitted to the fire alarm controller, which organizes the data and reports it to the monitoring platform.

[0039] The beneficial effects of the present invention are:

[0040] The present invention can detect the impact probability of the flame against the wall, the height of the fire source and the size of the flame according to the image alarm, and classify and calculate the flame according to the impact probability. In each case, the power of the fire source is evaluated in two ways and the evaluation results are compared. Through this system, the location of the fire in the tunnel can be found and the scale of the fire can be determined more accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic diagram of the distribution structure of temperature sensors and image-type fire detectors in a tunnel in the method for evaluating the scale, position and structural damage of wall-attached flames in a tunnel fire according to the present invention;

[0042] Figure 2 It is a schematic diagram of the flame height or flame longitudinal spread length, impact probability and fire source height identified by the flame opposite side image type fire detector in the method for evaluating the scale, position and structural damage of the flame attached to the wall in a tunnel fire according to the present invention;

[0043] Figure 3 Schematic diagram for the image - type fire detector on the flame side to identify the lateral spread length of the flame in the method for evaluating the scale, position and structural damage of the wall - attached flame in tunnel fires according to the present invention;

[0044] Figure 4 Schematic diagram of the process after a fire occurs in the method for evaluating the scale, position and structural damage of the wall - attached flame in tunnel fires according to the present invention;

[0045] Figure 5 Comparison diagram of the heat release rates Q1 and Q2 calculated from the lateral and longitudinal spread lengths when the flame impact probability in the model test of the method for evaluating the scale, position and structural damage of the wall - attached flame in tunnel fires according to the present invention is greater than or equal to 50%;

[0046] Figure 6 Comparison diagram of Q3 calculated from the increase value of the ceiling temperature and Q4 calculated from the flame height Lh when the flame impact probability in the model test of the method for evaluating the scale, position and structural damage of the wall - attached flame in tunnel fires according to the present invention is less than 50%;

[0047] Figure 7 Comparison diagram of the calculated heat release rate and the test heat release rate in the method for evaluating the scale, position and structural damage of the wall - attached flame in tunnel fires according to the present invention. Detailed implementation manners

[0048] Method for evaluating the scale, position and structural damage of the wall - attached flame in tunnel fires, which comprises the following steps

[0049] Step 1: Arrange image - type fire detectors on the side wall of the tunnel carriageway at a height of 2.7 m - 3.5 m from the carriageway, with an interval of 10 m, to measure the flame impact probability P, the flame size L h or L el and L et , the fire source height H f , and at the same time, arrange temperature sensors above the side wall of the carriageway to detect abnormal temperature conditions and measure the maximum temperature increase value ΔT for subsequent calculation of the heat release rate of the fire source;

[0050] Step 2: Obtain the heat release rate Q of the fire source in the signal processor;

[0051] Step 3: Organize the heat release rate of the fire source, the fire source height and the flame impact probability obtained in the signal processor, report the information to the monitoring platform, and the monitoring platform conducts a fire scale assessment and reports it level by level according to four levels: general fire, relatively large fire, major fire, and especially major fire.

[0052] In this embodiment, the measurement principles for determining the flame height and flame size in step 1 are as follows: Taking the tunnel height as the standard, the flame size and the height of the heat source are calculated according to a ratio. The flame height within a certain time period is selected, and the median of the flame height or length within this time period is used as the flame size at this stage. At the same time, a part of the area below the ceiling is selected to count the flame images, and the probability of the flame hitting the ceiling can be obtained.

[0053] In this embodiment, the installation interval of the image-type fire detector in step 1 is 10 m to ensure no detection blind area, and the height of the heat source measured is H f , the flame height is L h , the longitudinal spread length is L el , the longitudinal spread length is L et , and the net ceiling height H of the heat source can be obtained through calculation c , Hc = H - H f .

[0054] In this embodiment, the calculation formula for the heat release rate Q of the heat source in step 2 is as follows: Q1 = 27.5(L e + H c ) 5 / 2

[0055] Q2 = 23.5(2L e + H c ) 5 / 2

[0056] Q3 = (ΔTH c ) 3 / 2 / 380

[0057] Q4 = 29L h 5 / 2 ;

[0058] Among them, Q1 is the fire heat release rate calculated based on the longitudinal spread length L el ; Q2 is the fire heat release rate calculated based on the lateral spread length L et ; the unit is kW; L el and L et are the longitudinal and lateral horizontal spread lengths below the ceiling respectively, and the unit is m; H c is the net ceiling of the heat source, and the unit is m; Q3 is the fire heat release rate calculated based on the increase in ceiling temperature ΔT, and Q4 is the fire heat release rate calculated based on the flame height Lh; the unit is kW; ΔT is the increase in ceiling temperature, and the unit is K; L h is the flame height, and the unit is m;

[0059] After calculation, compare Q1 and Q2, Q3 and Q4 respectively. If the difference is too large, select a new segment of data for calculation until a definite result is obtained.

[0060] In this embodiment, in step 3, when evaluating the fire scale, a signal processor and a signal processing controller are also used. The signal processor is a fiber grating processor, and its main function is to receive the data output by the temperature sensing cable and the image-type fire detector, calculate the fire source power according to the set calculation system, and count and transmit the calculated and summarized fire information; the fire alarm controller, whose input end is connected to the signal processor, is used to receive the fire information processed by the signal processor, and upload the fire source height, fire source power, and the situation of hitting the ceiling to the monitoring platform.

[0061] In this embodiment, the monitoring platform in step 3 is mainly used to receive the fire alarm signal of the fire alarm controller, evaluate the tunnel fire scale, set the alarm threshold, determine the fire scale level, upload it to the fire emergency rescue department for precise fire fighting.

[0062] In this embodiment, the specific evaluation process is as follows: First, the temperature sensing cable identifies that there is an abnormal situation with a relatively high temperature in a part. During the identification, the position of the cable where the abnormal situation is measured can be used to obtain on which side of the tunnel the wall-attached fire occurs and its approximate position.

[0063] Then, turn on the image-type fire detector on the other side, and the identification content is as Figure 2 shown, and the flame size, fire source height H f and the impact probability P are identified. According to the probability P of the flame hitting the ceiling, the flame is classified.

[0064] When the probability of the flame hitting the ceiling is greater than or equal to 50%, it indicates that the flame continuously hits the ceiling and radially spreads below the ceiling, forming a ceiling jet. At this time, the fire causes relatively serious damage to the ceiling; at this time, the image-type fire detectors on both sides respectively identify the lateral spread length L et and the longitudinal spread length L el , as Figure 2 and Figure 3 shown, and use them to calculate the fire source power: input the fire source clearance H c and the longitudinal spread length L el identified by the image-type fire detector on the opposite side and the lateral spread length Let identified by the image-type fire detector on the same side into the signal processor. The signal processor calculates according to the fire source power calculation system, and the calculation formula is as follows:

[0065] Q1 = 27.5(L e + Hc) 5 / 2

[0066] Q2 = 23.5(2L e +H c ) 5 / 2

[0067] where Q1 is the fire heat release rate calculated based on the longitudinal spread length L el Q2 is the fire heat release rate calculated based on the lateral spread length L et , with the unit of kW; L el and L et are the longitudinal and lateral horizontal spread lengths below the ceiling respectively, with the unit of m; H c is the fire source clearance, with the unit of m;

[0068] Calculate the average value Q’ of Q1 and Q2, and calculate the error of the fire source power calculated using the spread lengths in two directions. The calculation method is as follows:

[0069] Q’ = (Q1 + Q2) / 2

[0070] Δ = |Q1 - Q’| / Q’

[0071] If the error is greater than 20%, re - select the flame images for a period of time using an image detector and process them, and statistically calculate the spread lengths in two directions to recalculate the fire source power; if the error is less than or equal to 20%, it means that the calculated fire source power is credible, and output the fire source power Q = Q’;

[0072] When the probability of the flame hitting the ceiling is less than 50%, it indicates that the probability of the flame hitting the ceiling is not high, the impact on the ceiling is weak, and the damage to the ceiling is relatively small. At this time, input the ceiling temperature rise ΔT and the flame height Lh into the signal processor respectively. The signal processor calculates based on the fire source power calculation system. The calculation formula is as follows:

[0073] Q3 = (ΔTHc) 3 / 2 / 380

[0074] Q4 = 29L h 5 / 2

[0075] where Q3 is the fire heat release rate calculated based on the ceiling temperature rise ΔT, Q4 is the fire heat release rate calculated based on the flame height Lh; the unit is kW; ΔT is the ceiling temperature rise, with the unit of K; L h is the flame height, with the unit of m; H c is the fire source clearance, with the unit of m.

[0076] Calculate the average value Q’ of Q3 and Q4, and calculate the error of the fire source power calculated using the spread lengths in two directions. The calculation method is as follows:

[0077] Q'=(Q3+Q4) / 2

[0078] Δ=|Q3-Q'| / Q'

[0079] If the error is greater than 20%, and Q3 calculated from the ceiling temperature rise is greater than the flame height L h If the error is greater than 20%, and the Q3 calculated from the ceiling temperature rise is less than the flame height L, then the Q4 calculated from the ceiling temperature rise is re-selected and re-calculated. h The calculated Q4 is judged as a false alarm because the power is small and the temperature change amplitude recognized by the temperature-sensing optical cable is relatively small, and the alarm is lifted; if the error is less than or equal to 20%, it means that the calculated fire source power is credible, and the output fire source power Q = Q';

[0080] Ultimately, all data is transmitted to the fire alarm controller, which organizes the data and reports it to the monitoring platform.

[0081] In this embodiment, in order to illustrate the accuracy of the fire source power prediction formula obtained above, the following verification is performed:

[0082] A 1:8 model tunnel was built. The model was 6m long, 1.2m wide and 0.8m high. The corresponding dimensions of the real tunnel were 48m long, 9.6m wide and 6.4m high. Both ends of the tunnel were open and naturally ventilated. A fire source was arranged at the center of the tunnel, close to the wall. The fire source was a propane burner with a side length of 0.1m. The propane flow was controlled by a flow controller to achieve the purpose of changing the fire source power.

[0083] In order to verify that the prediction method is applicable to different fire source heights, five fire source heights are set, namely 0m, 0.1m, 0.2m, 0.3m, and 0.4m; 14 fire source powers are set for each height, namely 2.13kW, 2.84kW, 5.67kW, 8.51kW, 11.35kW, 17.02kW, 22.69kW, 58.37kW, 34.04kW, 39.71kW, 51.06kW, 62.40kW, 73.75kW and 85.10kW, so that the experiment is closer to the actual situation; during the experiment, the image-type fire detector is used to obtain the size of the flame, and the temperature sensor is used to obtain the maximum temperature rise value under the ceiling. Then, the fire source power is calculated by the fire source power prediction formula, and the calculated value and set value of the fire source power are compared to obtain a comparison chart. Figure 5 It is the comparison of the fire source power Q1 and Q2 calculated by the horizontal and longitudinal propagation lengths when the probability of flame impact is greater than or equal to 50%; Figure 6 It is a comparison between Q3 calculated from the ceiling temperature rise value and Q4 calculated from the flame height Lh when the probability of flame impact is less than 50%;Figure 7 It is the ratio of the predicted value of the fire source power to the test value in the present invention. It can be seen that the error is within 20%, indicating that the prediction effect is good.

[0084] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for assessing the size, location and structural damage of wall-attached flames in tunnel fires, characterized by: It includes the following steps: Step 1: Arrange image-type fire detectors on the side wall of the tunnel carriageway at a height of 2.7m-3.5m from the carriageway, with an interval of 10m, to measure the flame impact probability P and flame size L h or L el and L et , fire source height H f ,At the same time, a temperature sensor is arranged above the side wall of the carriageway to detect abnormal temperature and determine the maximum temperature rise value ΔT for subsequent calculation of the fire source power; Step 2: Get the fire source power Q in the signal processor; Step 3: Organize the fire source power, fire source height and flame impact probability obtained in the signal processor, and report the information to the monitoring platform. The monitoring platform will assess the scale of the fire and divide it into four levels: general fire, large fire, major fire and extremely major fire, and report it step by step.

2. The method for evaluating the scale, location and structural damage of wall-attached flames in tunnel fires according to claim 1, characterized in that: The measurement principle for determining the flame height and flame size in step 1 is as follows: taking the tunnel height as the standard, the flame size and the fire source height are calculated in proportion, the flame height within a certain time period is selected and the median of the flame height or length within the time period is used as the flame size of this stage, and at the same time, a part of the area below the ceiling is selected to perform statistics on the flame image, so as to obtain the probability of the flame hitting the ceiling.

3. The method for evaluating the scale, location and structural damage of wall-attached flames in tunnel fires according to claim 1, characterized in that: The image-type fire detectors in step 1 are set at intervals of 10m to ensure that there is no blind spot in detection. The fire source height measured is H f , the flame height is L h , the longitudinal extension length is L el , the longitudinal extension length is L et , and the fire source clearance height H can be obtained by calculation c , Hc=HH f .

4. The method for evaluating the scale, location and structural damage of wall-attached flames in tunnel fires according to claim 1, characterized in that: The calculation formula of the fire source power Q in step 2 is as follows: Q1 = 27.5 (L e +H c ) 5 / 2 <h2 style=";text-align:left;direction:ltr">Q2 = 23.5(2L<h2 style=";text-align:left;direction:ltr"> e <h2 style=";text-align:left;direction:ltr"> +H<h2 style=";text-align:left;direction:ltr"> c <h2 style=";text-align:left;direction:ltr"> )<h2 style=";text-align:left;direction:ltr"> 5 / 2 Q3=(ΔTH c ) 3 / 2 / 380 Q4=29L h 5 / 2 ; Where Q1 is the longitudinal spreading length L el The calculated fire heat release rate, Q2, depends on the lateral spread length L et Calculated fire heat release rate, in kW; L el and L et are the longitudinal and transverse horizontal spreading lengths under the ceiling, in meters; H c is the fire source clearance, in m; Q3 is the fire heat release rate calculated based on the ceiling temperature rise ΔT, Q4 is the fire heat release rate calculated based on the flame height Lh; the unit is kW; ΔT is the ceiling temperature rise, the unit is K; L h is the flame height, in m; After the calculation, Q1 and Q2, Q3 and Q4 are compared respectively. If the difference is too large, a new section of data is selected for calculation until a definite result is obtained.

5. The method for evaluating the scale, location and structural damage of wall flames in tunnel fires according to claim 1, characterized in that: In step 3, a signal processor and a signal processing controller are also used when evaluating the scale of the fire. The signal processor is a fiber grating processor, which mainly receives data output by the temperature sensing cable and the image-type fire detector, calculates the fire source power according to a set calculation system, and counts and transmits the calculated and summarized fire information. The fire alarm controller has an input end connected to the signal processor, which is used to receive the fire information processed by the signal processor, and upload the fire source height, fire source power and the impact on the ceiling to the monitoring platform.

6. The method for evaluating the scale, location and structural damage of wall-attached flames in tunnel fires according to claim 5, characterized in that: The monitoring platform in step 3 is mainly used to receive the fire alarm signal from the fire alarm controller, conduct tunnel fire scale assessment, set the alarm threshold, determine the fire scale level, upload it to the fire emergency rescue department, and carry out precise firefighting.

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