Dynamic variable electro-optical mark for escape system

Abstract

The invention relates to the technical field of tunnel safety facilities, in particular to a dynamic variable electro-optical mark for an escape system, which comprises a monitoring unit, a position positioning unit, a central processing unit module and a display determining module, the monitoring unit is composed of a plurality of monitoring points, and each point is provided with a temperature and smoke sensor to acquire data and transmit the data to the central processing module; the position positioning unit determines three-dimensional coordinates of all parts and an escape exit, the central processing module judges a fire disaster, positions a fire point and plans an escape route according to data and converts the fire point into an instruction to be sent to the display driving module, and the display driving module controls the dynamic variable electro-optical sign body and provides escape guidance through arrows, characters and voice prompts. The invention aims to solve the problems that the fixed direction of the traditional escape indication sign is easy to mislead, the fire monitoring and positioning are inaccurate, the escape guidance form is single, and the intelligent planning of the escape route based on multi-position information is lacked.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel safety facilities and relates to a dynamically variable electro-optical sign for an escape system. Background Art

[0002] In the security system of closed spaces such as tunnels, escape signs play a vital role. They are key facilities to guide people to evacuate safely in an emergency. With the development of technology, electro-optical signs have been widely used in the field of tunnel escape signs.

[0003] Traditional escape signs are mostly set in fixed directions and cannot be dynamically adjusted according to actual dangerous situations. Once an emergency such as a fire occurs in a tunnel, signs in fixed directions may lead escapees to dangerous areas, resulting in casualties and property losses. Some existing signs can only simply monitor environmental information and cannot accurately locate the fire point. For example, patent number CN218004354U is an ultra-energy-saving and low-power electro-optical sign in a tunnel. Although there is a radar detector to control the light and dark of the sign in the scheme, it involves less fire monitoring and positioning functions, and it is difficult to meet the needs of complex fire scenes. At the same time, the form of escape guidance is also relatively simple, and most of them are only indicated by static graphics or text, lacking diversified prompting methods such as voice. For people with limited vision or panic, the guidance effect is not good. In addition, most of the current escape indication systems lack the ability to intelligently plan escape routes based on multi-location information, cannot fully consider the real-time conditions of each location in the tunnel, and cannot provide the best escape path for escapees.

[0004] In response to the above problems, the current patent number is CN218004354U, and the name of the patent is a super energy-saving and low-power electro-optical sign in the tunnel. This patent uses profiles and corners to form a sign frame, installs a translucent sign board, a low-power LED light board, and is equipped with a radar detector. It can control the light and dark of the sign according to the traffic conditions of people and vehicles in the tunnel, achieving the purpose of energy saving. Its advantages are reasonable structural design, easy production and installation, and significant energy-saving effect; its disadvantages are weak functions in fire monitoring, positioning, and intelligent escape guidance, and cannot meet the needs of accurate information and dynamic guidance in emergency situations such as fire.

[0005] Another example is CN219716439U, a tunnel wireless communication electro-optical sign integrated device, which integrates multiple sensors, such as gas sensors, light intensity sensors, etc., can monitor multiple information in the tunnel, and realize information communication and data transmission through voice modules and wireless communication modules. The advantages are rich functions, more real-time data in the tunnel can be obtained, and the wiring is simple and beautiful; however, there are deficiencies in fire positioning and intelligent planning of escape routes based on multi-location information, and it cannot provide comprehensive and accurate escape guidance for escapees in emergency situations. Summary of the invention

[0006] The present invention provides a dynamically variable electro-optical sign for an escape system to solve the problems of traditional escape indication signs having fixed directions that are easily misleading, inaccurate fire monitoring and positioning, a single form of escape guidance, and lack of intelligent planning of escape routes based on multi-location information.

[0007] In order to solve the above problems, the technical solution adopted by the invention is:

[0008] A dynamically variable electro-optical sign for an escape system, comprising:

[0009] Monitoring unit: In the variable electro-optical sign bodies distributed at different locations in the tunnel, each monitoring point is equipped with a temperature sensor and a smoke sensor to collect temperature data and smoke concentration data of the area in real time, and transmit the collected data to the central processing module;

[0010] Positioning unit: used to determine the position of each dynamically variable electro-optical sign and each monitoring point in the tunnel. The position information is expressed in the form of three-dimensional coordinates (x, y, z), where x represents the coordinate along the length of the tunnel, y represents the horizontal coordinate perpendicular to the length of the tunnel, and z represents the vertical coordinate; at the same time, the position coordinates of each escape exit in the tunnel are recorded;

[0011] Central processing module: Receives temperature data and smoke density data from the monitoring unit, decomposes one or more abnormal sensor sets by identifying sensors with abnormal data and their correlation in position, and then evaluates the positional relationship between the fire point and the sensors in this set based on the different abnormal values ​​in this set, and then determines the fire point and escape exit location information through the sensor coordinates, and plans a safe escape route based on the preset algorithm; converts the planned escape route information into control instructions and sends them to the display driver module;

[0012] Display driving module: receives control instructions from the central processing module, and controls the display content of the dynamically variable electro-optical sign according to the instruction content, wherein the display content includes arrow direction, text prompts, and voice prompts.

[0013] The principle of this scheme is:

[0014] This solution uses temperature sensors and smoke sensors to collect temperature and smoke concentration data in real time through monitoring points distributed throughout the tunnel in the monitoring unit and transmits them to the central processing module. The positioning unit determines the three-dimensional coordinate positions of the dynamic variable electro-optical sign, monitoring points and escape exits; the central processing module determines the location of the fire and the ignition point based on the received data, and uses a preset algorithm in combination with the location information to plan a safe escape route and convert it into control instructions to send to the display driver module; the display driver module controls the dynamic variable electro-optical sign body according to the instructions, and provides accurate escape guidance for escaping personnel through arrow directions, text prompts and voice prompts.

[0015] The beneficial effects of this program:

[0016] In the monitoring unit, temperature sensors and smoke sensors are densely distributed in different positions of the tunnel. They can capture subtle changes in temperature and smoke concentration in real time, and realize immediate detection of fire. Compared with the traditional small number of fire detectors, the comprehensiveness and accuracy of monitoring are improved. Through sensor data, the central processing module can accurately locate the fire point, provide a reliable basis for subsequent escape route planning, avoid blind escape of escapees, and reduce the risk of entering dangerous areas.

[0017] The central processing module combines the dynamic variable electro-optical signs, the three-dimensional coordinate information of the fire point and the escape exit provided by the location positioning unit, and uses the preset algorithm to plan the escape route. This method breaks through the limitations of the traditional fixed indication direction and can adjust the escape route in real time according to the actual fire situation. For example, when a fire occurs in the original escape direction, a new safe route can be quickly planned to effectively guide people to escape, greatly improving the success rate of escape.

[0018] The display driver module controls the dynamically variable electro-optical sign body, providing three guidance methods: arrow direction, text prompts and voice prompts. In a smoke-filled and dimly lit tunnel environment, voice prompts can provide assistance to escapees with limited vision; while arrows and text prompts meet the needs of escapees under normal circumstances. Multiple prompt methods complement each other to ensure that escapees in different states can obtain accurate escape information.

[0019] Furthermore, the specific steps of the central processing module to determine the location of the tunnel fire point are as follows:

[0020] For the temperature data T collected at each monitoring point i And smoke density data S i , where i represents the i-th monitoring point, which is compared with the preset temperature threshold T and smoke concentration threshold S respectively. i >T and S i >S, it is determined that a fire may occur in the area where the monitoring point is located, and the monitoring point is marked as a suspected fire point monitoring point;

[0021] If there are multiple adjacent suspected fire point monitoring points, the weighted average algorithm is used to determine the exact location of the fire point. Suppose there are n adjacent suspected fire point monitoring points, and their position coordinates are (x j ,y j , z j ), the temperature weight of each monitoring point is

[0022]

[0023] The weight of smoke concentration is

[0024]

[0025] Comprehensive weight

[0026]

[0027] The calculation formula for the location coordinates of the fire point is:

[0028]

[0029] Furthermore, the algorithm steps of the central processing module for planning a safe escape route are as follows:

[0030] Define the position coordinates of a dynamic variable electro-optical mark as P(x p ,y p , z p ), the location coordinates of the fire point are Q(x q ,x q ,x q ), the location coordinates of the mth escape exit in the tunnel are E = (x m ,y m ,z m ), m = 1, 2, ..., m, where m is the total number of escape exits);

[0031] Calculate the distance d1 from the dynamic variable electro-optical sign to each escape exit and the distance d2 to the fire point. The distance calculation formula uses the Euclidean distance in three-dimensional space to calculate d1 and d2. The formula is:

[0032]

[0033] And select the escape exits satisfying d1>d2, that is, the escape exits that are farther from the dynamically variable electro-optical sign than the fire point, and form these escape exits into a candidate escape exit set B;

[0034] For each escape exit in the candidate escape exit set B, calculate whether there are obstacles or other dangerous areas on the path from the dynamically variable electro-optical sign to the escape exit. Assume that there are N intermediate detection points on the path, and their position coordinates are R n =(x rn ,y rn , z rn ), n = 1, 2, ... N, for each intermediate detection point, determine whether it is located within the danger radius r of the fire point. The danger radius r is determined by the preset formula r = k1T according to the severity of the fire. q +k2S q Calculated, where T q is the temperature at the ignition point, S q is the smoke concentration at the fire point, k1 and k2 are preset coefficients). If all the intermediate monitoring points on the path are not within the danger radius of the fire point, the path of the escape exit is safe;

[0035] From the escape exits with safe paths, select the escape exit closest to the dynamically variable electro-optical sign as the optimal safe escape exit A.

[0036] Further, the central processing module encodes the planned safe escape exit information into binary control instructions, the exit including but not limited to exit number, direction, and distance;

[0037] The display driver module receives the binary control instruction, decodes it, and extracts the direction information and distance information of the safe escape exit;

[0038] According to the extracted direction information, the arrow on the dynamically variable electro-optical sign is controlled to point in the direction of the safe escape exit; according to the distance information, the distance from the dynamically variable electro-optical sign to the safe escape exit is displayed on the sign in the form of numbers or graphics.

[0039] Furthermore, it also includes a backup power supply module, which is connected to the monitoring unit, the position positioning unit, the central processing module, the display driving module and the dynamically variable electro-optical sign body.

[0040] Furthermore, the dynamically variable electro-optical sign body is made of a new quantum dot composite organic light-emitting material.

[0041] Furthermore, the logo body adopts a multi-layer composite structure, which includes a luminous layer, a buffer layer, a barrier layer, and a protective layer from the inside to the outside. The buffer layer is made of silicone rubber material, the barrier layer is made of titanium dioxide, and the protective layer is made of polycarbonate material.

[0042] Furthermore, a tungsten bronze color-changing layer is coated on the surface of the logo body, and a transparent ion conductor layer is further coated on the surface of the tungsten bronze color-changing layer.

[0043] Furthermore, the central processing module is also connected to the monitoring system of the tunnel management center for communication, and uploads the fire occurrence information, the location information of the fire point and the escape route planning information to the monitoring system in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a structural flow chart of the present invention;

[0045] Figure 2 It is a structural schematic diagram of the dynamically variable electro-optical sign body of the present invention;

[0046] Figure 3 It is a structural schematic diagram of the present invention. DETAILED DESCRIPTION

[0047] The reference numerals in the drawings of the specification include: variable electro-optical sign body 1, luminous layer 2, buffer layer 3, protective layer 4, barrier layer 5, bronze color-changing layer 6, ion conductor layer 7

[0048] Embodiment 1, as Figure 1 As shown, a dynamic variable electro-optical sign for an escape system comprises:

[0049] Monitoring unit: In the variable electro-optical sign bodies distributed at different locations in the tunnel, each monitoring point is equipped with a temperature sensor and a smoke sensor to collect temperature data and smoke concentration data of the area in real time, and transmit the collected data to the central processing module;

[0050] Positioning unit: used to determine the position of each dynamically variable electro-optical sign and each monitoring point in the tunnel. The position information is expressed in the form of three-dimensional coordinates, where x represents the coordinate along the length of the tunnel, y represents the horizontal coordinate perpendicular to the length of the tunnel, and z represents the vertical coordinate; at the same time, the position coordinates of each escape exit in the tunnel are recorded;

[0051] Central processing module: Receives temperature data and smoke density data from the monitoring unit, decomposes one or more abnormal sensor sets by identifying sensors with abnormal data and their correlation in position, and then evaluates the positional relationship between the fire point and the sensors in this set based on the different abnormal values ​​in this set, and then determines the fire point and escape exit location information through the sensor coordinates, and plans a safe escape route based on the preset algorithm; converts the planned escape route information into control instructions and sends them to the display driver module;

[0052] Display driving module: receiving control instructions from the central processing module, and controlling the display content of the dynamic variable electro-optical sign according to the instruction content, wherein the display content includes arrow direction, text prompts, and voice prompts;

[0053] This solution uses temperature sensors and smoke sensors to collect temperature and smoke concentration data in real time through monitoring points distributed throughout the tunnel in the monitoring unit and transmits them to the central processing module. The positioning unit determines the three-dimensional coordinate positions of the dynamic variable electro-optical sign, monitoring points and escape exits; the central processing module determines the location of the fire and the ignition point based on the received data, and uses a preset algorithm in combination with the location information to plan a safe escape route and convert it into control instructions to send to the display driver module; the display driver module controls the dynamic variable electro-optical sign body according to the instructions, and provides accurate escape guidance for escaping personnel through arrow directions, text prompts and voice prompts.

[0054] In the monitoring unit, temperature sensors and smoke sensors are densely distributed in different positions of the tunnel. They can capture subtle changes in temperature and smoke concentration in real time, and realize immediate detection of fire. Compared with the traditional small number of fire detectors, the comprehensiveness and accuracy of monitoring are improved. Through sensor data, the central processing module can accurately locate the fire point, provide a reliable basis for subsequent escape route planning, avoid blind escape of escapees, and reduce the risk of entering dangerous areas.

[0055] The central processing module combines the dynamic variable electro-optical signs, the three-dimensional coordinate information of the fire point and the escape exit provided by the location positioning unit, and uses the preset algorithm to plan the escape route. This method breaks through the limitations of the traditional fixed indication direction and can adjust the escape route in real time according to the actual fire situation. For example, when a fire occurs in the original escape direction, a new safe route can be quickly planned to effectively guide people to escape, greatly improving the success rate of escape.

[0056] The display driver module controls the dynamically variable electro-optical sign body, providing three guidance methods: arrow direction, text prompts and voice prompts. In a smoke-filled and dimly lit tunnel environment, voice prompts can provide assistance to escapees with limited vision; while arrows and text prompts meet the needs of escapees under normal circumstances. Multiple prompt methods complement each other to ensure that escapees in different states can obtain accurate escape information.

[0057] The specific steps of the central processing module to determine the location of the tunnel fire point are as follows:

[0058] For the temperature data T collected at each monitoring point i And smoke density data S i , where i represents the i-th monitoring point, which is compared with the preset temperature threshold T and smoke concentration threshold S respectively. i >T and S i >S, it is determined that a fire may occur in the area where the monitoring point is located, and the monitoring point is marked as a suspected fire point monitoring point;

[0059] If there are multiple adjacent suspected fire point monitoring points, the weighted average algorithm is used to determine the exact location of the fire point. Suppose there are n adjacent suspected fire point monitoring points, and their position coordinates are (x j ,y j , Z j ), the temperature weight of each monitoring point is

[0060]

[0061] The weight of smoke concentration is

[0062]

[0063] Comprehensive weight

[0064]

[0065] The calculation formula for the location coordinates of the fire point is:

[0066]

[0067] The above scheme compares the data collected by each monitoring point with the preset threshold to preliminarily screen out the suspected fire point monitoring points, and can quickly locate the area where the fire may occur. When there are multiple adjacent suspected points, the application of the weighted average algorithm takes into account the influence of two key factors, temperature and smoke density, on the judgment of the fire point. The calculation of the temperature weight and smoke density weight is based on the actual data of each monitoring point, so that the monitoring points with more obvious data changes and closer to the actual fire source situation are selected. For example, the monitoring points with higher temperature and thicker smoke have larger corresponding weights, and the final calculated fire point location will be closer to these key areas, thereby improving the accuracy of the fire point location; in the actual tunnel environment, the fire may not be concentrated at an absolute point, but spread in a certain area, and there will be multiple adjacent suspected fire point monitoring points. The weighted average algorithm can integrate the information of these adjacent points instead of relying on a single monitoring point. This enables the system to accurately judge the approximate center position of the fire point when facing complex situations such as the spread of fire and smoke diffusion in the early stage of the fire, providing a more reliable basis for subsequent escape route planning, and avoiding errors in escape route planning due to misjudgment.

[0068] The algorithm steps of the central processing module to plan a safe escape route are as follows:

[0069] Define the position coordinates of a dynamic variable electro-optical mark as P(x p ,y p , z p ), the location coordinates of the fire point are Q(x q ,x q ,x q), the location coordinates of the mth escape exit in the tunnel are E = (x m ,y m ,z m ), m = 1, 2, ..., m, where m is the total number of escape exits;

[0070] Calculate the distance d1 from the dynamic variable electro-optical sign to each escape exit and the distance d2 to the fire point. The distance calculation formula uses the Euclidean distance in three-dimensional space to calculate d1 and d2. The formula is:

[0071]

[0072] And select the escape exits satisfying d1>d2, that is, the escape exits that are farther from the dynamically variable electro-optical sign than the fire point, and form these escape exits into a candidate escape exit set B;

[0073] For each escape exit in the candidate escape exit set B, calculate whether there are obstacles or other dangerous areas on the path from the dynamically variable electro-optical sign to the escape exit. Assume that there are N intermediate detection points on the path, and their position coordinates are R n =(x rn ,y rn , z rn ), n = 1, 2, ... N, for each intermediate detection point, determine whether it is located within the danger radius r of the fire point. The danger radius r is determined by the preset formula r = k1T according to the severity of the fire. q +k2S q Calculated, where T q is the temperature at the ignition point, S q is the smoke concentration at the fire point, k1 and k2 are preset coefficients). If all the intermediate monitoring points on the path are not within the danger radius of the fire point, the path of the escape exit is safe;

[0074] From the escape exits with safe paths, select the escape exit closest to the dynamically variable electro-optical sign as the optimal safe escape exit A.

[0075] The above scheme calculates the distance d1 from the dynamically variable electro-optical sign to the escape exit and the distance d2 to the fire point, and selects the escape exits that satisfy d1>d2 to form a candidate set. This can ensure that the candidate escape exits are in relatively safe locations, avoid guiding escapees directly to the fire point, and by setting intermediate detection points and judging whether these monitoring points are within the danger radius of the fire point, the safety of the escape path can be comprehensively and carefully evaluated. The danger radius is dynamically calculated based on the temperature and smoke concentration at the fire point, fully considering the severity of the fire, making the evaluation result more accurate and reliable. Only when all the intermediate detection points on the path are not within the danger radius, the path of the escape exit is deemed safe, which provides double insurance for escapees and maximizes safety during the escape process.

[0076] The central processing module encodes the planned safe escape exit information into binary control instructions, including but not limited to exit number, direction, distance,

[0077] The display driver module receives the binary control instruction, decodes it, and extracts the direction information and distance information of the safe escape exit;

[0078] According to the extracted direction information, the arrow on the dynamically variable electro-optical sign is controlled to point in the direction of the safe escape exit; according to the distance information, the distance from the dynamically variable electro-optical sign to the safe escape exit is displayed on the sign in the form of numbers or graphics.

[0079] The central processing module in the above scheme encodes complex safe escape exit information, exit number, direction, distance, etc. into binary control instructions. Binary coding has high accuracy and stability, and can avoid information loss or errors to the greatest extent during transmission. According to the extracted direction information, the arrow on the dynamically variable electro-optical sign can clearly indicate the escape direction. As an intuitive visual symbol, the arrow can enable escapees to respond quickly in an emergency. According to the distance information, the distance to the safe escape exit is displayed in digital or graphical form, so that escapees have a clear understanding of the length of the escape path, which helps them to reasonably plan the escape speed and physical distribution, and improve the escape efficiency.

[0080] The backup power supply module is connected to the monitoring unit, the position positioning unit, the central processing module, the display drive module and the dynamically variable electro-optical sign body. The backup power supply module can continuously supply power to the monitoring unit, the position positioning unit, the central processing module, the display drive module and the dynamically variable electro-optical sign body. The monitoring unit can continue to monitor the temperature and smoke concentration data, the position positioning unit can maintain the accuracy of the position information, the central processing module can continuously plan the escape route according to the new data, and the display drive module can drive the electro-optical sign body to normally display the escape information.

[0081] The dynamic variable electro-optical sign body is made of a new quantum dot composite organic luminescent material, which has excellent luminous efficiency and can produce high-brightness light. In a special environment such as a tunnel, the high-brightness sign can ensure that the escapee can clearly see the indication information even in low light or smoke-filled conditions.

[0082] like Figure 2-3 As shown, the sign body adopts a multi-layer composite structure, which includes a luminous layer 2, a buffer layer 3, a barrier layer 4, and a protective layer 5 from the inside to the outside. The buffer layer 3 is made of silicone rubber material, the barrier layer 4 is made of titanium dioxide, and the protective layer is made of polycarbonate material. The buffer layer 3 is arranged in a tunnel environment, and the silicone rubber material can effectively buffer the vibration caused by vehicle driving and possible collisions to prevent the internal luminous layer from being damaged. At the same time, titanium oxide can effectively prevent the invasion of moisture, oxygen and other harmful gases. The outermost protective layer is made of carbonate material with the characteristics of high strength and high hardness. After the surface is hardened, it can resist external physical wear, scratches and impacts.

[0083] The surface of the variable electro-optical sign body is coated with a tungsten bronze color-changing layer 6, and a transparent ion conductor layer 7 is coated on the surface of the tungsten bronze color-changing layer 5. The tungsten bronze color-changing layer 6 is coated on the surface of the variable electro-optical sign body 1, and its electrochromic characteristics can be used to indicate environmental changes in the tunnel. When the humidity, pH, and concentration of harmful gases in the tunnel change, the color of the tungsten bronze color-changing layer will change by applying a weak current.

[0084] The central processing module is also connected to the monitoring system of the tunnel management center for communication, and uploads the fire occurrence information, the location information of the fire point and the escape route planning information to the monitoring system in real time, so that the staff of the tunnel management center can obtain the fire occurrence information, the location information of the fire point and the escape route planning information in real time.

[0085] In actual use, multiple monitoring points are evenly distributed in the tunnel at a certain interval. The interval is determined by factors such as the tunnel length, structure and passing traffic volume, and is generally 50-100 meters. Each monitoring point is fixed with a high-precision temperature sensor with an accuracy of ±0.1℃ and a high-sensitivity smoke sensor that can detect as low as 0.01mg / m 3 The sensor is connected to the data transmission line by wire or wireless means to ensure that the collected temperature data and smoke concentration data can be transmitted to the central processing module in real time and stably.

[0086] A combination of laser ranging and satellite positioning is adopted, with laser ranging base stations set up at the tunnel entrance and at certain intervals. Satellite positioning signals are used to assist positioning, and professional surveying and mapping tools are used to accurately measure and record the three-dimensional coordinates of each dynamically variable electro-optical sign, monitoring point and escape exit, and enter them into the database of the central processing module.

[0087] A high-performance industrial-grade computer or microprocessor is selected as the core device, equipped with sufficient memory and storage capacity to ensure that large amounts of data can be processed quickly and complex algorithms can be run. It is installed in the computer room of the tunnel management center and connected to the monitoring unit, position positioning unit, display driver module and the monitoring system of the tunnel management center through a high-speed network.

[0088] According to the number and distribution of dynamically variable electro-optical sign bodies, the display driver module is reasonably configured and installed in a distribution box close to the electro-optical sign body. It is connected to the central processing module and the electro-optical sign body through a data cable to ensure that the control instructions can be received and executed in a timely manner.

[0089] In accordance with the principle of easy observation by people in the tunnel, the signs should be installed on the tunnel wall, top or near the evacuation passage. The installation height should be 2-2.5 meters from the ground to ensure that the escapees can see clearly when standing or walking. For longer tunnels, multiple signs should be set up in different locations as needed to ensure that each area has sufficient instructions.

[0090] A large-capacity uninterruptible power supply or emergency battery pack is selected as the backup power supply and installed in the machine room of the tunnel management center or near each distribution box. It is connected to the monitoring unit, position positioning unit, central processing module, display drive module and dynamically variable electro-optical sign body through wires to ensure continuous power supply for 2-4 hours when the main power supply fails.

[0091] System operation process

[0092] The temperature sensor and smoke sensor in the monitoring unit collect the temperature and smoke concentration data of the area in real time, and send the data to the central processing module every 1 to 5 seconds. The location positioning unit updates the coordinate information of each location every 10 to 30 seconds and transmits it to the central processing module.

[0093] After receiving the fire monitoring data, the central processing module immediately compares the temperature data and smoke density data of each monitoring point with the preset temperature threshold T and smoke density threshold S. When the temperature data is greater than T and the smoke density data is greater than S, the monitoring point is marked as a suspected fire point monitoring point. If there are multiple adjacent suspected fire point monitoring points, the central processing module uses a weighted average algorithm to determine the exact location of the fire point, calculates the temperature weight, smoke density weight and comprehensive weight of each monitoring point, and then calculates the location coordinates of the fire point according to the formula.

[0094] The central processing module combines the three-dimensional coordinate information of the dynamic variable electro-optical sign, the fire point and the escape exit provided by the position positioning unit, calculates the distance from the dynamic variable electro-optical sign to each escape exit and the distance to the fire point, and selects the escape exits that are farther away from the dynamic variable electro-optical sign than the fire point to form a candidate escape exit set B. For each escape exit in set B, calculate whether the intermediate detection point on the path from the dynamic variable electro-optical sign to the escape exit is within the danger radius r of the fire point. If all the intermediate monitoring points on the path are not within the danger radius, the path of the escape exit is safe. Finally, from the escape exits with safe paths, select the escape exit closest to the dynamic variable electro-optical sign as the optimal safe escape exit A.

[0095] The central processing module encodes the planned safe escape exit information, including exit number, direction, distance, etc., into binary control instructions and sends them to the display driver module through the data line.

[0096] After receiving the binary control instruction, the display driver module decodes it and extracts the direction and distance information of the safe escape exit. According to the direction information, the arrow on the dynamically variable electro-optical sign is controlled to point to the direction of the safe escape exit; according to the distance information, the distance from the dynamically variable electro-optical sign to the safe escape exit is displayed in the form of numbers or graphics on the sign. At the same time, the voice prompt function is triggered as needed to provide all-round escape guidance for the escapee.

[0097] The tungsten bronze color-changing layer on the surface of the sign body will change its color when the humidity, pH, and harmful gas concentration in the tunnel changes. The sensor will detect and trigger a weak current, causing the color of the tungsten bronze color-changing layer to change, reminding maintenance personnel to pay attention to the environmental conditions in the tunnel.

[0098] At the same time, the central processing module uploads the fire occurrence information, fire point location information and escape route planning information to the monitoring system of the tunnel management center in real time. Based on this information, the staff of the tunnel management center will promptly organize emergency rescue work, coordinate the fire, medical, transportation and other departments to carry out rescue operations, and at the same time monitor and command the escape situation in the tunnel in real time.

[0099] The above are only embodiments of the present invention. Common knowledge such as the known specific structures and characteristics in the scheme is not described in detail here. Ordinary technicians in the relevant field are aware of all the common technical knowledge in the technical field to which the invention belongs before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply conventional experimental means before that date. Ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A dynamically variable electro-optical sign for an escape system, comprising: Monitoring unit: It consists of variable electro-optical sign bodies distributed at different locations in the tunnel. Each monitoring point is equipped with a temperature sensor and a smoke sensor to collect temperature data and smoke concentration data in the area in real time, and transmit the collected data to the central processing module; Positioning unit: used to determine the position of each dynamically variable electro-optical sign and each monitoring point in the tunnel. The position information is expressed in the form of three-dimensional coordinates (x, y, z), where x represents the coordinate along the length of the tunnel, y represents the horizontal coordinate perpendicular to the length of the tunnel, and z represents the vertical coordinate; at the same time, the position coordinates of each escape exit in the tunnel are recorded; Central processing module: Receives temperature data and smoke density data from the monitoring unit, decomposes one or more abnormal sensor sets by identifying sensors with abnormal data and their correlation in position, and then evaluates the positional relationship between the fire point and the sensors in this set based on the different abnormal values ​​in this set, and then determines the fire point and escape exit location information through the sensor coordinates, and plans a safe escape route based on the preset algorithm; converts the planned escape route information into control instructions and sends them to the display driver module; Display driving module: receives control instructions from the central processing module, and controls the display content of the dynamically variable electro-optical sign according to the instruction content, wherein the display content includes arrow direction, text prompts, and voice prompts. A dynamically variable electro-optical sign for an escape system, characterized by comprising: Monitoring unit: It consists of multiple monitoring points distributed in different locations in the tunnel. Each monitoring point is equipped with a temperature sensor and a smoke sensor to collect temperature data and smoke concentration data in the area in real time, and transmit the collected data to the central processing module; Positioning unit: used to determine the position of each dynamically variable electro-optical sign and each monitoring point in the tunnel. The position information is expressed in the form of three-dimensional coordinates (x, y, z), where x represents the coordinate along the length of the tunnel, y represents the horizontal coordinate perpendicular to the length of the tunnel, and z represents the vertical coordinate; at the same time, the position coordinates of each escape exit in the tunnel are recorded; Central processing module: Receives temperature data and smoke concentration data from the monitoring unit, determines whether a fire has occurred in the tunnel and the location of the fire point; combines the location of the mark, the location of the fire point and the location of the escape exit provided by the position positioning unit, and plans a safe escape route according to the preset algorithm; converts the planned escape route information into control instructions and sends them to the display driver module; Display driving module: receiving control instructions from the central processing module, and controlling the display content of the dynamic variable electro-optical sign according to the instruction content, wherein the display content includes arrow direction, text prompt, and voice prompt; Dynamically variable electro-optical sign body: installed in a position that is easy for people to observe in the tunnel, it can dynamically change the display content through the control of the display drive module to provide accurate escape guidance for escaping personnel.

2. A dynamically variable electro-optical sign for an escape system according to claim 1, characterized in that: The specific steps of the central processing module to determine the location of the tunnel fire point are as follows: For the temperature data T collected at each monitoring point i And smoke density data S i , where i represents the i-th monitoring point, which is compared with the preset temperature threshold T and smoke concentration threshold S respectively. i >T and S i >S, it is determined that a fire may occur in the area where the monitoring point is located, and the monitoring point is marked as a suspected fire point monitoring point; If there are multiple adjacent suspected fire point monitoring points, the weighted average algorithm is used to determine the exact location of the fire point. Suppose there are n adjacent suspected fire point monitoring points, and their position coordinates are (x j ,y j , z j ), the temperature weight of each monitoring point is The weight of smoke concentration is Comprehensive weight The calculation formula for the location coordinates of the fire point is:

3. The dynamically variable electro-optical sign for an escape system according to claim 1, characterized in that: The algorithm steps of the central processing module to plan a safe escape route are as follows: Define the position coordinates of a dynamic variable electro-optical mark as P(x p ,y p , z p ), the location coordinates of the fire point are Q(x q ,x q ,x q ), the location coordinates of the mth escape exit in the tunnel are E = (x m ,y m ,z m ), m = 1, 2, ..., m, where m is the total number of escape exits); Calculate the distance d1 from the dynamic variable electro-optical sign to each escape exit and the distance d2 to the fire point. The distance calculation formula uses the Euclidean distance in three-dimensional space to calculate d1 and d2. The formula is: And select the escape exits satisfying d1>d2, that is, the escape exits that are farther from the dynamically variable electro-optical sign than the fire point, and form these escape exits into a candidate escape exit set B; For each escape exit in the candidate escape exit set B, calculate whether there are obstacles or other dangerous areas on the path from the dynamically variable electro-optical sign to the escape exit. Assume that there are N intermediate detection points on the path, and their position coordinates are R n =(x rn ,y rn , z rn ), n = 1, 2, ... N, for each intermediate detection point, determine whether it is located within the danger radius r of the fire point. The danger radius r is determined by the preset formula r = k1T according to the severity of the fire. q +k2S q Calculated, where T q is the temperature at the ignition point, S q is the smoke concentration at the fire point, k1 and k2 are preset coefficients). If all the intermediate detection points on the path are not within the danger radius of the fire point, the path of the escape exit is safe; From the escape exits with safe paths, select the escape exit closest to the dynamically variable electro-optical sign as the optimal safe escape exit A.

4. The dynamically variable electro-optical sign for an escape system according to claim 1, characterized in that: The central processing module encodes the planned safe escape exit information into binary control instructions, including but not limited to exit number, direction, and distance; The display driver module receives the binary control instruction, decodes it, and extracts the direction information and distance information of the safe escape exit; According to the extracted direction information, the arrow on the dynamically variable electro-optical sign is controlled to point in the direction of the safe escape exit; according to the distance information, the distance from the dynamically variable electro-optical sign to the safe escape exit is displayed on the sign in the form of numbers or graphics.

5. The dynamically variable electro-optical sign for an escape system according to claim 1, characterized in that: It also includes a backup power supply module, which is connected to the monitoring unit, the position positioning unit, the central processing module, the display driving module and the dynamically variable electro-optical sign body.

6. The dynamically variable electro-optical sign for an escape system according to claim 1, characterized in that: The dynamic variable electro-optical sign body is made of a new type of quantum dot composite organic luminescent material.

7. The dynamically variable electro-optical sign for an escape system according to claim 1, characterized in that: The logo body adopts a multi-layer composite structure, which includes a luminous layer, a buffer layer, a barrier layer, and a protective layer from the inside to the outside. The buffer layer is made of silicone rubber material, the barrier layer is made of titanium dioxide, and the protective layer is made of polycarbonate material.

8. A dynamically variable electro-optical sign for an escape system according to claim 7, characterized in that: The surface of the sign body is coated with a tungsten bronze color-changing layer, and a transparent ion conductor layer is further coated on the surface of the tungsten bronze color-changing layer.

9. The dynamically variable electro-optical sign for an escape system according to claim 1, characterized in that: The central processing module is also connected to the monitoring system of the tunnel management center for communication, and uploads the fire occurrence information, the location information of the fire point and the escape route planning information to the monitoring system in real time.

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