Rail transit vehicle fire early warning system

Abstract

The utility model discloses a rail transit vehicle fire early warning system. The system comprises a plurality of thermal imaging acquisition terminals which are used for acquiring thermal image data of a target in a comprehensive control cabinet of each compartment of a rail transit vehicle and judging whether the temperature of the target is at a set threshold value or not according to the thermal image data; the plurality of first communication terminals are connected with a power line in the rail transit vehicle and send out received thermal image data and judgment results through power line carrier communication; the second communication terminal receives the thermal image data and the judgment result sent by the plurality of first communication terminals based on power line carrier communication, and the monitoring host is used for displaying the thermal image and the judgment result of the target and controlling to output an early warning signal when the judgment result is that a set threshold value is exceeded. According to the utility model, early warning can be carried out on an over-high-temperature area before a fire disaster occurs; and the information of each sensor can be transmitted to the monitoring host without additional wiring, so that the maintenance efficiency of maintenance staff is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fire warning, and in particular to a rail transit vehicle fire warning system. Background Art

[0002] Due to the specific structural environment of railway vehicles, once a fire occurs, its characteristics are: initial smoldering, followed by rapid spread of the fire, strong environmental winds, long passenger car operation routes, and difficulty in evacuating passengers, which may cause operational impacts, property losses, and casualties.

[0003] Electrical fire is one of the causes of rail transit vehicle fires. The specific causes of electrical fires are as follows:

[0004] 1. Short circuit, overload, aging, damage, leakage, arc, equipment overheating;

[0005] 2. Poor contact and increased contact resistance;

[0006] For electrical fires, traditional line protection devices (overcurrent, overload, overheat protection, leakage current detection, etc.) all work at certain set values. If the fault current does not reach the protection set value, the protection switch will not operate. In engineering practice, if the design, installation errors or carelessness lead to mismatched electrical equipment protection or poor construction quality, such faults are often impossible to monitor and cause fires.

[0007] Current fire detectors may fail or give false alarms in places with heavy dust, water mist, steam, corrosion pollution, and high relative humidity. The details are as follows:

[0008] 1. Some key parts prone to electric fire (such as power electrical connectors, circuit board power supply parts, power components, capacitors, power diodes, etc.) cannot be monitored;

[0009] 2. The temperature sensing sticker is only suitable for single-point coverage and requires manual real-time inspection, which may cause omissions and large daily maintenance and repair workload;

[0010] 3. The current fire alarm system can only sound an alarm after a fire occurs, but cannot prevent it before it happens.

[0011] At present, thermal imaging technology is widely used in gate security inspection, electrical inspection, distribution box inspection, mechanical maintenance, air conditioning and HVAC inspection, building defect inspection, forest fire fighting, etc., but rarely used in rail vehicle on-board inspection. At present, some subway companies and railway bureaus have adopted handheld thermal imagers to conduct regular inspections of electrical equipment, especially key parts such as terminals and connectors in electrical cabinets, to check for safety hazards. The survey found that thermal imaging detection technology has unique advantages in temperature measurement, hidden fire detection, and fire smoke penetration command and rescue. Utility Model Content

[0012] The utility model aims to provide a rail transit vehicle fire warning system in view of the deficiencies in the prior art.

[0013] To achieve the above-mentioned purpose, the utility model provides a rail transit vehicle fire warning system, comprising:

[0014] A plurality of thermal imaging acquisition terminals are respectively arranged in the integrated control cabinet of each compartment of the rail transit vehicle, for collecting thermal image data of the target in the integrated control cabinet of each compartment of the rail transit vehicle, and judging whether the temperature of the target is within a set threshold value according to the thermal image data, and sending the thermal image data and the judgment result;

[0015] A plurality of first communication terminals, each of which is connected to a plurality of thermal imaging acquisition terminals and is used to receive thermal image data and judgment results sent by the plurality of thermal imaging acquisition terminals, wherein the first communication terminal is connected to a power line in a rail transit vehicle and sends the received thermal image data and judgment results through power carrier communication;

[0016] The second communication terminal is connected to the power line in the rail transit vehicle, and is used to receive the thermal image data and judgment results sent by the plurality of first communication terminals based on the power carrier communication, and send out the received thermal image data and judgment results.

[0017] The monitoring host is connected to the second communication terminal to display the thermal image and judgment result of the target, and when the judgment result exceeds a set threshold, controls the output of an early warning signal.

[0018] Furthermore, the thermal imaging acquisition terminal includes:

[0019] Several thermal imaging acquisition probes are used to collect thermal image data of targets in the integrated control cabinets of each compartment of rail transit vehicles;

[0020] A first processor is connected to the thermal imaging acquisition probe, and is used to receive thermal image data acquired by the thermal imaging acquisition probe, and to determine whether the temperature of the target is within a set threshold value according to the thermal image data;

[0021] A first communication module, used for sending the thermal image data and the judgment result to a first communication terminal;

[0022] The first power module is connected to the first processor and is used to provide working power to the first processor.

[0023] Furthermore, there are one or more thermal imaging acquisition probes.

[0024] Furthermore, the first processor is also connected to a first memory, and the first memory is used to store the thermal image data and the judgment result.

[0025] Furthermore, the first communication terminal includes:

[0026] A second communication module, used for receiving the thermal image data and the judgment result sent by the first communication module;

[0027] A second processor, connected to the second communication module, for processing the thermal image data and the judgment result received by the second communication module;

[0028] a first power line carrier communication module connected to the second processor and configured to send the thermal image data and the judgment result processed by the second processor through the power line;

[0029] The second power supply module is connected to the power line and the second processor respectively, and is used to obtain power from the power line and convert it into a DC5V voltage to provide to the second processor.

[0030] Furthermore, the output end of the second power module is connected to the input end of the first power module.

[0031] Furthermore, the second communication terminal includes:

[0032] a second power carrier communication module, used for receiving the thermal image data and the judgment result sent by the first power carrier communication module from the power line;

[0033] a third processor, connected to the second power carrier communication module, for processing the thermal image data and the judgment result received by the second power carrier communication module;

[0034] a third communication module, connected to the third processor, for sending the thermal image data and the judgment result processed by the third processor to the monitoring host;

[0035] The third power supply module is connected to the power line and the third processor respectively, and is used to obtain power from the power line and convert it into a DC5V voltage to provide to the third processor.

[0036] Furthermore, the monitoring host includes:

[0037] A fourth communication module, used for receiving the thermal image data and the judgment result sent by the third communication module;

[0038] a fourth processor, connected to the fourth communication module, for processing the thermal image data and the judgment result received by the fourth communication module;

[0039] a display module connected to the fourth processor and used for displaying the thermal image data and the judgment result processed by the fourth processor;

[0040] A fourth power supply module is connected to the fourth processor and is used to provide working power to the fourth processor.

[0041] Furthermore, the output end of the third power module is connected to the input end of the fourth power module.

[0042] Furthermore, the first communication module and the second communication module as well as the third communication module and the fourth communication module are all RS485 modules or CAN modules or Ethernet modules or RS232 modules.

[0043] Beneficial effects: 1. The utility model can provide early warning of areas with excessively high temperatures before a fire occurs;

[0044] 2. The power carrier technology is applied to the signal transmission of the rail transit vehicle fire warning device. Without additional wiring, the information of each sensor can be transmitted to the monitoring host;

[0045] 3. Use thermal imaging technology to detect the temperature of the heating area, which is suitable for large-area temperature monitoring of multiple components in a small integrated control cabinet;

[0046] 4. Real-time monitoring and early warning can greatly reduce the operating risks of passenger trains and improve the maintenance and repair efficiency of maintenance personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a structural schematic diagram of a rail transit vehicle fire warning system according to an embodiment of the utility model;

[0048] Figure 2 It is a principle block diagram of the thermal imaging acquisition terminal of the embodiment of the utility model;

[0049] Figure 3 This is a principle block diagram of a thermal imaging acquisition terminal according to another embodiment of the present utility model;

[0050] Figure 4 It is a principle block diagram of a first communication terminal of an embodiment of the utility model;

[0051] Figure 5 It is a principle block diagram of a second communication terminal of an embodiment of the utility model;

[0052] Figure 6 It is a principle block diagram of a monitoring host according to an embodiment of the utility model. DETAILED DESCRIPTION

[0053] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. The embodiments are implemented based on the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0054] like Figure 1 As shown, an embodiment of the utility model provides a rail transit vehicle fire warning system, including multiple thermal imaging acquisition terminals 1, multiple first communication terminals 2, a second communication terminal 3 and a monitoring host 4.

[0055] Among them, multiple thermal imaging acquisition terminals 1 are respectively arranged in the integrated control cabinet of each compartment of the rail transit vehicle, for collecting thermal image data of the target in the integrated control cabinet of each compartment of the rail transit vehicle, and judging whether the temperature of the target is within the set threshold value according to the thermal image data, and sending the thermal image data and the judgment result to the first communication terminal 2. It is a prior art to analyze the temperature of the target according to the thermal image data, and the principle will not be repeated here. In addition, there can be multiple thermal imaging acquisition terminals 1 set in each integrated control cabinet. The above-mentioned targets can be main power connection points, components, etc.

[0056] Each first communication terminal 2 is connected to a plurality of thermal imaging acquisition terminals 1 to receive thermal image data and judgment results sent by the plurality of thermal imaging acquisition terminals 1. The first communication terminal 2 is connected to the power line in the rail transit vehicle, and sends the received thermal image data and judgment results to the second communication terminal 3 via power carrier communication. Preferably, a first communication terminal 2 is provided in the integrated control cabinet of each carriage of the rail transit vehicle, and all thermal imaging acquisition terminals 1 in the integrated control cabinet are connected to the first communication terminal 2. The above-mentioned power line may be a DC110V power line in the rail transit vehicle, but is not limited thereto.

[0057] The second communication terminal 3 is connected to the power line in the rail transit vehicle, and is used to receive the thermal image data and judgment results sent by multiple first communication terminals 2 based on power carrier communication, and send the received thermal image data and judgment results to the monitoring host 4.

[0058] The monitoring host 4 is connected to the second communication terminal 3 to display the thermal image and judgment result of the target, and when the judgment result exceeds the set threshold, control the output of the warning signal. The above-mentioned warning signal can be output through an alarm light, a buzzer, etc.

[0059] Specifically, the thermal imaging acquisition terminal 1 can be installed in the integrated control cabinet by magnetic attraction, see Figure 2 and Figure 3, which specifically includes several thermal imaging acquisition probes 11, a first processor 12, a first communication module 13 and a first power module 14. Among them, the thermal imaging acquisition probe 11 is used to collect thermal image data of targets in the integrated control cabinet of each compartment of the rail transit vehicle. The model of the thermal imaging acquisition probe 11 is preferably MLX90640, which includes a camera with an ultra-wide field of view of 110°. The first processor 12 is connected to the thermal imaging acquisition probe 11 to receive the thermal image data sent by the thermal imaging acquisition probe 11, and judge whether the temperature of the target is within the set threshold according to the thermal image data. The first communication module 13 is used to send the thermal image data and the judgment result to the first communication terminal 2. The output end of the first power module 14 is connected to the first processor 12 to provide working power to the first processor 12. In addition, the thermal imaging acquisition probe 11 included in a thermal imaging acquisition terminal 1 can be one or more. It is also preferred to connect the first processor 12 to the first memory 15, and the first memory 15 is used to store the thermal image data and the judgment result. The first memory 15 is preferably an SD card.

[0060] See also Figure 4 The first communication terminal 2 of the embodiment of the utility model includes a second communication module 21, a second processor 22, a first power carrier communication module 23 and a second power supply module 24. Among them, the format of the second communication module 21 is the same as that of the first communication module 13, and the second communication module 21 and the first communication module 13 can be RS485 modules or CAN modules or Ethernet modules or RS232 modules. The second communication module 21 is connected to the first communication module 13 to receive the thermal image data and judgment results sent by the first communication module 13. The second processor 22 is connected to the second communication module 21 to process the thermal image data and judgment results received by the second communication module 21, and process them into a data format that meets the requirements of the first power carrier communication module 23. The first power carrier communication module 23 is connected to the second processor 22 to send the thermal image data and judgment results processed by the second processor 22 through the above-mentioned power line. The input end of the second power module 24 is connected to the power line to obtain a DC110V power supply voltage from the power line, and the output end of the second power module 24 is connected to the second processor 22 to convert the voltage into a DC5V voltage and provide it to the second processor 22. The output end of the second power module 24 is also preferably connected to the input end of the first power module 14, and the first power module 14 can convert the DC5V voltage into a DC3.3V voltage and provide it to the first processor 12.

[0061] See also Figure 5The second communication terminal 3 of the embodiment of the utility model includes a second power carrier communication module 31, a third processor 32, a third communication module 33 and a third power supply module 34. Among them, the second power carrier communication module 31 is used to receive the thermal image data and judgment results sent by the first power carrier communication module 23 from the power line. The third processor 32 is connected to the second power carrier communication module 31 to process the thermal image data and judgment results received by the second power carrier communication module 31, and process them into a data format that meets the data format required for the third communication module 33 to send. The third communication module 33 is connected to the third processor 32 to send the thermal image data and judgment results processed by the third processor 32 to the monitoring host 4. The input end of the third power supply module 34 is connected to the power line to obtain a DC110V power supply voltage from the power line. The output end of the third power supply module 34 is connected to the third processor 32 and converted into a DC5V voltage to provide to the third processor 32.

[0062] See also Figure 6 The monitoring host 4 of the embodiment of the utility model is generally arranged in the cab, and specifically includes a fourth communication module 41, a fourth processor 42, a display module 43 and a fourth power module 44. Among them, the fourth communication module 41 is of the same format as the third communication module 33, and the fourth communication module 41 and the third communication module 33 can be RS485 modules, CAN modules, Ethernet modules or RS232 modules. The fourth communication module 41 is connected to the third communication module 33 to receive the thermal image data and judgment results sent by the third communication module 33. The fourth processor 42 is used to process the thermal image data and judgment results received by the fourth communication module 41 into a data format that meets the display module 43 display requirements. The display module 43 is used to display the thermal image data and judgment results processed by the fourth processor. The fourth power module 44 is connected to the fourth processor 42 to provide working power to the fourth processor 44. The output end of the third power module 34 is connected to the input end of the fourth power module 44. The fourth power module 44 can convert the DC5V voltage into a DC3.3V voltage and provide it to the fourth processor 42. The fourth processor 42 is also preferably connected to a second memory 45 , and the second memory 45 is used to store the thermal image data and the judgment results received by the fourth communication module 41 .

[0063] In addition, the preferred model of the first processor 12, the second processor 22, the third processor 32, and the fourth processor 42 of the embodiment of the utility model is STM32F107, the preferred model of the first power carrier communication module 23 and the second power carrier communication module 31 is HiSilicon HI3921, the preferred model of the second power supply module 24 and the third power supply module 34 is URB1D05LMD-10WR3, and the preferred model of the first power supply module 14 and the fourth power supply module 44 is AMS1117.

[0064] The above is only a preferred embodiment of the utility model. It should be pointed out that for ordinary technicians in this technical field, other parts not specifically described belong to the prior art or common knowledge. Under the premise of not departing from the principle of the utility model, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the utility model.

Claims

1. A rail transit vehicle fire warning system, characterized in that: include: A plurality of thermal imaging acquisition terminals are respectively arranged in the integrated control cabinet of each compartment of the rail transit vehicle, for collecting thermal image data of the target in the integrated control cabinet of each compartment of the rail transit vehicle, and judging whether the temperature of the target is within a set threshold value according to the thermal image data, and sending the thermal image data and the judgment result; A plurality of first communication terminals, each of which is connected to a plurality of thermal imaging acquisition terminals and is used to receive thermal image data and judgment results sent by the plurality of thermal imaging acquisition terminals, wherein the first communication terminal is connected to a power line in a rail transit vehicle and sends the received thermal image data and judgment results through power carrier communication; The second communication terminal is connected to the power line in the rail transit vehicle, and is used to receive the thermal image data and judgment results sent by the plurality of first communication terminals based on the power carrier communication, and send out the received thermal image data and judgment results. The monitoring host is connected to the second communication terminal to display the thermal image and judgment result of the target, and when the judgment result exceeds a set threshold, controls the output of an early warning signal.

2. A rail transit vehicle fire warning system according to claim 1, characterized in that: The thermal imaging acquisition terminal comprises: Several thermal imaging acquisition probes are used to collect thermal image data of targets in the integrated control cabinets of each compartment of rail transit vehicles; A first processor is connected to the thermal imaging acquisition probe, and is used to receive thermal image data acquired by the thermal imaging acquisition probe, and to determine whether the temperature of the target is within a set threshold value according to the thermal image data; A first communication module, used for sending the thermal image data and the judgment result to a first communication terminal; The first power module is connected to the first processor and is used to provide working power to the first processor.

3. A rail transit vehicle fire warning system according to claim 2, characterized in that: The number of the thermal imaging acquisition probes is one or more.

4. A rail transit vehicle fire warning system according to claim 2, characterized in that: The first processor is also connected to a first memory, and the first memory is used to store the thermal image data and the judgment result.

5. A rail transit vehicle fire warning system according to claim 2, characterized in that: The first communication terminal comprises: A second communication module, used for receiving the thermal image data and the judgment result sent by the first communication module; A second processor, connected to the second communication module, for processing the thermal image data and the judgment result received by the second communication module; a first power line carrier communication module connected to the second processor and configured to send the thermal image data and the judgment result processed by the second processor through the power line; The second power supply module is connected to the power line and the second processor respectively, and is used to obtain power from the power line and convert it into a DC5V voltage to provide to the second processor.

6. A rail transit vehicle fire warning system according to claim 5, characterized in that: The output end of the second power module is connected to the input end of the first power module.

7. A rail transit vehicle fire warning system according to claim 5, characterized in that: The second communication terminal comprises: a second power carrier communication module, used for receiving the thermal image data and the judgment result sent by the first power carrier communication module from the power line; a third processor, connected to the second power carrier communication module, for processing the thermal image data and the judgment result received by the second power carrier communication module; a third communication module, connected to the third processor, for sending the thermal image data and the judgment result processed by the third processor to the monitoring host; The third power supply module is connected to the power line and the third processor respectively, and is used to obtain power from the power line and convert it into a DC5V voltage to provide to the third processor.

8. A rail transit vehicle fire warning system according to claim 7, characterized in that: The monitoring host comprises: A fourth communication module, used for receiving the thermal image data and the judgment result sent by the third communication module; a fourth processor, connected to the fourth communication module, for processing the thermal image data and the judgment result received by the fourth communication module; a display module connected to the fourth processor and used for displaying the thermal image data and the judgment result processed by the fourth processor; A fourth power supply module is connected to the fourth processor and is used to provide working power to the fourth processor.

9. A rail transit vehicle fire warning system according to claim 8, characterized in that: The output end of the third power module is connected to the input end of the fourth power module.

10. A rail transit vehicle fire warning system according to claim 8, characterized in that: The first communication module and the second communication module as well as the third communication module and the fourth communication module are all RS485 modules or CAN modules or Ethernet modules or RS232 modules.

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