CN108197374B - Automatic monitoring method and monitoring system for hidden danger of track roadbed structure - Google Patents
Automatic monitoring method and monitoring system for hidden danger of track roadbed structure Download PDFInfo
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- CN108197374B CN108197374B CN201711462985.XA CN201711462985A CN108197374B CN 108197374 B CN108197374 B CN 108197374B CN 201711462985 A CN201711462985 A CN 201711462985A CN 108197374 B CN108197374 B CN 108197374B
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Abstract
The invention discloses a track subgrade structure hidden danger automatic monitoring method and a monitoring system thereof, comprising the following steps: a: presetting a structural modal safety range value and a structural form safety range value of a track subgrade in a cloud platform, and respectively establishing a structural modal damage alarm model and a structural form damage alarm model; b: the method comprises the following steps that track subgrade changes when on-track running vehicles pass are used as dynamic excitation, a plurality of field terminals installed on the track subgrade are used for detecting structural modes and structural form characteristics of the track subgrade, and when the on-track running vehicles pass through the field terminals, the field terminals transmit structural mode information and structural form information to the on-track running vehicles; c: after the step B is finished, the vehicle running on the track transmits the structural modal information and the structural form information to the cloud platform; the invention has the advantages of low power consumption, no operation and the like, and can continuously monitor the health condition of the whole road network track roadbed structure for a long time.
Description
Technical Field
The invention relates to the field of safety detection of roads and building structures, in particular to an automatic monitoring method and a monitoring system for hidden dangers of a track roadbed structure.
Background
Road and railway transportation are important components of the transportation industry, so that a huge road traffic system provides great challenges for road maintenance and management in China, and the problem of how to perform more efficient and comprehensive road information detection on a road traffic network so as to provide more comprehensive information support for road maintenance and management becomes a front problem of all departments.
The detection of the hidden danger of the road track roadbed structure is an important guarantee of track traffic operation, huge manpower and resources are often consumed when the detection is carried out by the existing technical means, and special tests are often needed when the health condition of the road track roadbed structure is to be comprehensively known, and the special tests are often carried out in a point test mode, so that the point test mode is complicated in equipment and is difficult to realize when the equipment is expanded to the whole line. In order to realize online monitoring and pre-judgment prediction of health conditions in the operation of the whole road network track subgrade, the whole road network track subgrade is still in a blank state at home at present.
Disclosure of Invention
The invention aims to provide an automatic monitoring method and a monitoring system for hidden dangers of a track roadbed structure, which solve the problems that the conventional roadbed structure hidden danger detection system is high in energy consumption and operation and maintenance cost, and a detection area is limited; the method has the advantages of low power consumption, no operation and capability of continuously monitoring the health condition of the whole road network track roadbed structure for a long time.
The invention is realized by the following technical scheme:
the automatic monitoring method for the hidden danger of the track subgrade structure comprises the following steps:
a: presetting a structural modal safety range value and a structural form safety range value of a track subgrade in a cloud platform, and respectively establishing a structural modal damage alarm model and a structural form damage alarm model;
b: the method comprises the following steps that track subgrade changes when on-track running vehicles pass are used as dynamic excitation, a plurality of field terminals installed on the track subgrade are used for detecting structural modes and structural form characteristics of the track subgrade, and when the on-track running vehicles pass through the field terminals, the field terminals transmit structural mode information and structural form information to the on-track running vehicles;
c: and B, after the step B is finished, the vehicle running on the track transmits the structural modal information and the structural form information to the cloud platform, the cloud platform compares the data in the structural modal information and the structural form information with the structural modal safety range value and the structural form safety range value one by one, and if the data in the structural modal information and the structural form information exceed the preset safety range value, a damage alarm is sounded.
In the prior art, a manual point measurement mode for a track subgrade is mainly adopted, and the point measurement mode has numerous and complicated equipment and needs to consume huge manpower and resources when being extended to a whole line. In order to solve the problems, the invention installs a plurality of field terminals in a full-rail road foundation network, utilizes a sensor to detect a rail roadbed structure, transmits detected data to a communication base station, then transmits the data to a cloud platform, and the cloud platform analyzes the detected data. The mode is easily thought by those skilled in the art, but the mode is not adopted all the time, because the field terminal and the cloud platform belong to long-distance communication through the communication base station, the GPRS and WiFi communication technologies are usually adopted, the communication mode needs larger transmitting power and consumes much power, the cost of a power line for paving the field terminal on a whole network roadbed is high, the installation technology is complex, and the maintenance cost is high; and the field terminal has limitation in installation environment position and can be installed only in a place close to the communication base station, so that a lot of roadbed sections in severe environment and poor network cannot transmit detected data. Therefore, in the prior art, the track subgrade is tested by using the sensor, and then the analysis mode by the cloud platform is almost difficult to realize.
The invention designs a monitoring method to overcome the problems, and the field terminal firstly transmits the monitored data information to the on-rail vehicle terminal (namely, the on-rail running vehicle), and then transmits the data information to the cloud platform, so that the direct communication mode between the field terminal and the cloud platform is changed. The vehicle running on the track subgrade is provided with a plurality of communication devices, the wireless short-distance communication with a field terminal is realized by utilizing the communication devices, the transmitting power required by the field terminal for transmitting the monitoring data to the on-track vehicle terminal is very small, the power consumption is low, and extra electric power wire leading is not required, so the required communication cost is very low, the health condition of the track subgrade structure can be continuously monitored for a long time, and the installation technology is simpler. And then, the on-rail vehicle terminal is used as a transfer station, the on-rail vehicle terminal is communicated with the cloud platform, and the power consumption required by the communication between the on-rail vehicle terminal and the cloud platform is very small for the on-rail vehicle terminal, so that the normal work of the on-rail vehicle terminal is not influenced. Therefore, the energy consumption of the field terminal communication is greatly reduced in the mode, more energy consumption is transferred to the sensors at the field terminal, more sensors are laid on the track roadbed, the structural form and the structural mode of the track roadbed are monitored, the health condition of the track roadbed is monitored in many aspects, and for the detection condition, a worker can perform targeted maintenance and repair on the track roadbed according to the analysis early warning condition of the cloud platform, the driving safety is improved, and the road network maintenance efficiency is improved. Along with the removal of on-rail operation vehicle, the environment is abominable, the relatively poor road bed section's of network detected information also can go out through on-rail vehicle terminal transmission, can cover track road bed full network, has very high economy and practical value.
The structural modes include dynamic response characteristics of the track bed under the loading effect of the rail-bound vehicle. Furthermore, the dynamic response characteristic refers to the frequency mode shape of each order of dynamic detection data, and the trend change or the sudden variation of the structure under the loading effect of the rail running vehicle is known through the change amplitude of the frequency mode shape.
The structural morphology includes at least one state characteristic of dynamic deflection amplitude, static stress strain, horizontal tilt and temperature and humidity of the track bed. Furthermore, if the structure of the track subgrade is unchanged, the dynamic deflection amplitude, the static stress strain and the horizontal inclination of the structure of the track subgrade are not changed, and if the structure is changed, otherwise, the state characteristic is changed.
Monitoring system based on track roadbed structure hidden danger automatic monitoring method includes at rail vehicle terminal, cloud platform and a plurality of field terminal of installing on the track roadbed, field terminal passes through first wireless network with at rail vehicle terminal and is connected, at rail vehicle terminal passes through the second wireless network with the cloud platform and is connected, wherein:
a field terminal: detecting the structural mode and structural form of the track subgrade, and sending structural mode information and structural form information to a terminal of the on-track vehicle;
at the rail vehicle terminal: receiving structural modal information and structural form information sent by a field terminal, and transmitting the structural modal information and the structural form information to a cloud platform;
cloud platform: and receiving the structural modal information and the structural form information transmitted by the rail vehicle terminal, and sounding a damage alarm when the structural modal information and the structural form information exceed a preset safety range value.
Aiming at the problems in the prior art, the invention designs a monitoring system aiming at a monitoring method, and overcomes the problems. The first wireless network is a short-distance and low-power-consumption transmission network, and the second wireless network is a long-distance transmission network. The method is characterized in that an existing full-automatic operation working mechanism is arranged in a field terminal, and the potential hazards of the track roadbed structure are monitored from two aspects of a structural mode (dynamic state) and a structural form (static state) by means of exciting and loading at a rail vehicle terminal. The cloud platform takes the structural modal information and the structural form information received during initial installation and when no vehicle passes through as a safety range value, namely, a normal safety line is set, then the field terminal monitors the track roadbed structure in real time, the cloud platform converts the received structural modal information and the structural form information into data for analysis and conversion, a data curve is drawn in a display of the cloud platform, and when the data exceeds the safety range value, an alarm can be generated to indicate that the track roadbed needs to be maintained and processed. The principle is as follows: the structure of the track subgrade is unchanged, and the response obtained by the structural mode and the structural form is unchanged; the track bed structure changes, the response obtained by the structural mode and the structural form changes, and when the change amplitude exceeds a safety range value, a loss alarm is triggered.
The field terminal comprises a sensor module, an embedded computer module and a wireless communication module, wherein:
a sensor module: detecting the structural mode and structural form of the track subgrade, and sending structural mode data and structural form data to the embedded computer module;
embedded computer module: receiving the structural modal data and the structural form data sent by the sensor module, and sending structural modal information and structural form information to the wireless communication module;
the wireless communication module: and receiving the structural modal information and the structural form information sent by the embedded computer module, and taking the structural modal information and the structural form information as a plurality of data packets to be continuously transmitted to the rail vehicle terminal. Further, the sensor module includes various sensors, which may be buried under the track bed or installed on the track bed according to the characteristics and functions of the sensors. The embedded computer module has analysis and control functions, and can convert the received sensor signals into data signals and transmit the data signals to the wireless communication module. The wireless communication module is different from a general wireless communication module, and belongs to the technical field of short-distance communication, and has the characteristics of low power consumption and low cost. The wireless communication module takes the structural modal information and the structural form information as a plurality of data packets to be transmitted to the rail vehicle terminal continuously, namely the monitoring data is continuously transmitted all the time in a broadcast communication mode, so that the wireless communication module is suitable for areas with large traffic flow or high speed, and avoids the problem that the vehicle cannot receive the data in time; the data packets can be packed according to the content nodes and can also be packed according to the time nodes, the data packets can be continuously sent to different on-rail vehicle terminals, and the detected data are completely sent out.
The field terminal comprises a sensor module, a trigger module, a time delay module, an embedded computer module and a wireless communication module, wherein:
a sensor module: detecting the structural mode and structural form of the track subgrade, and sending structural mode data and structural form data to the embedded computer module;
a triggering module: sensing a signal of the on-rail vehicle, and transmitting the signal of the on-rail vehicle as a trigger signal to the embedded computer module;
a time delay module: receiving a delay instruction sent by the embedded computer module, and sending an ending instruction to the embedded computer module after timing is finished;
embedded computer module: receiving structural modal data and structural morphological data sent by a sensor module, receiving a trigger signal sent by a trigger module, sending structural modal information and structural morphological information to a wireless communication module as a trigger instruction by using the trigger signal, and sending a delay instruction to a delay module; receiving an ending instruction sent by the delay module, and sending a communication stopping instruction to the wireless communication module;
the wireless communication module: receiving structural modal information and structural form information sent by an embedded computer module, and transmitting the structural modal information and the structural form information to a rail vehicle terminal; and receiving a communication stopping instruction sent by the embedded computer module, and stopping working. Further, the sensor module includes various sensors, which may be buried under the track bed or installed on the track bed according to the characteristics and functions of the sensors. The embedded computer module has analysis and control functions, and can convert the received sensor signals into data signals and transmit the data signals to the wireless communication module. The wireless communication module is different from a general wireless communication module, and belongs to the technical field of short-distance communication, and has the characteristics of low power consumption and low cost. In the area with small traffic flow or fast speed, the monitoring data is sent by adopting the triggering mode, namely when the vehicle passes through the field terminal, the field terminal transmits the monitoring data out, thereby avoiding communication waste and achieving the purpose of saving electricity.
Preferably, the sensor module includes at least one of an acceleration sensor, a speed sensor, an angle sensor, a temperature and humidity sensor, and a stress and strain sensor. Furthermore, an acceleration sensor, a speed sensor, an angle sensor and a stress-strain sensor respectively detect the acceleration, the speed, the angle change amplitude and the deformation tensile quantity of the track subgrade when a vehicle passes through the track subgrade, and a temperature and humidity sensor is used for detecting the temperature and the humidity of the track subgrade. The sensor of the present invention includes, but is not limited to, the above sensors, and may further include a vibration sensor, an ultrasonic sensor, and the like.
Preferably, the wireless communication module is an NFC communication module, a UWB communication module, or a bluetooth communication module. Further, the NFC communication module is a short-range high-frequency radio technology, operates within a distance of 10 cm at a frequency of 13.56MHz, and has three transmission speeds of 106 Kbit/s, 212 Kbit/s or 424 Kbit/s; a wireless connection technology that provides easy, safe, and rapid communication is possible. The UWB communication module can be applied in a small-range, high-resolution radar and image system capable of penetrating walls, the ground and the body; it is possible to support data transmission rates up to 110Mb/s in the 10m range, without the need for compressed data, and to achieve video data processing quickly, easily, and economically. The working frequency of the Bluetooth communication is 2.4GHz, the effective range is about 10m, the data can be mutually transmitted at the speed of about 1Mb/s, the Internet can be conveniently accessed, and the power consumption is low.
Preferably, the field terminal further comprises a power management module, and the power management module comprises a solar charging device. Furthermore, the existing solar power generation device is installed in the power management module, and solar energy is utilized to provide power for the field terminal, so that wireless manual charging is realized, power supply and maintenance are avoided, and the solar power generation device is environment-friendly and practical. The charging mode is suitable for areas with sufficient sunlight and long sunshine time.
Preferably, the field terminal further comprises a power management module, and the power management module comprises an electromagnetic radiation charging device. Furthermore, the power management module can also be charged by adopting electromagnetic radiation, electromagnetic radiation can be emitted when the rail vehicle terminal passes through, the electromagnetic source radiated when the rail vehicle terminal passes through is collected by utilizing the conventional electromagnetic radiation charging device, and electromagnetic energy can be converted into electric energy to charge the rail vehicle terminal. The invention includes but not limited to two charging modes of solar energy and electromagnetic radiation, and can also adopt various modes such as vibration mechanical energy, and can simultaneously adopt solar charging and electromagnetic radiation to perform charging operation.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. according to the automatic monitoring method and the monitoring system for the hidden danger of the track roadbed structure, the structural mode and the structural form of the track roadbed structure are continuously monitored, so that the change trend or the variation characteristic curve of the health condition of the roadbed can be drawn, the damage of the maintenance and repair alarm structure is guided, the early discovery and early treatment are realized, the traffic safety of track traffic is ensured, and the maintenance efficiency of a road network is improved;
2. according to the track roadbed structure hidden danger automatic monitoring method and the monitoring system thereof, the on-track vehicle terminal is used as a transfer station, and then the structure mode information and the structure form information are transmitted to the cloud platform in a transmission mode, so that the power consumption of field terminal communication is greatly reduced, a manual operation-free mode is realized, the method is not limited by the environment, the purpose of continuously monitoring the health condition of the whole network track roadbed structure for a long time can be realized along with the movement of the on-track running vehicle, and the track roadbed structure hidden danger automatic monitoring method and the monitoring system thereof have very high economic and practical values;
3. the invention relates to an automatic monitoring method and a monitoring system for hidden danger of a track roadbed structure, which are provided with a power supply management module, and can be charged and operated in multiple modes by utilizing solar energy and electromagnetic radiation energy, thereby realizing no manual stay wire power supply and no maintenance.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of a field terminal using broadcast according to the present invention;
FIG. 3 is a schematic diagram of a field terminal employing a trigger mode according to the present invention;
FIG. 4 is a graph illustrating a trend analysis of alarm damage data in accordance with the present invention;
FIG. 5 is a schematic diagram of the structural damage pulse within the safe range of values for the present invention;
FIG. 6 is a schematic diagram of the structural damage pulse when generating an alarm according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1
As shown in fig. 1, 2, 4, 5 and 6, the method for automatically monitoring hidden troubles of a track subgrade structure comprises the following steps:
a: presetting a structural modal safety range value and a structural form safety range value of a track subgrade in a cloud platform, and respectively establishing a structural modal damage alarm model and a structural form damage alarm model;
b: the method comprises the following steps that track subgrade changes when on-track running vehicles pass are used as dynamic excitation, a plurality of field terminals installed on the track subgrade are used for detecting structural modes and structural form characteristics of the track subgrade, and when the on-track running vehicles pass through the field terminals, the field terminals transmit structural mode information and structural form information to the on-track running vehicles;
c: and B, after the step B is finished, the vehicle running on the track transmits the structural modal information and the structural form information to the cloud platform, the cloud platform compares the data in the structural modal information and the structural form information with the structural modal safety range value and the structural form safety range value one by one, and if the data in the structural modal information and the structural form information exceed the preset safety range value, a damage alarm is sounded. The structural modes include dynamic response characteristics of the track bed under the loading effect of the rail-bound vehicle. The structural morphology includes at least one state characteristic of dynamic deflection amplitude, static stress strain, horizontal tilt and temperature and humidity of the track bed.
Monitoring system based on track roadbed structure hidden danger automatic monitoring method includes at rail vehicle terminal, cloud platform and a plurality of field terminal of installing on the track roadbed, field terminal passes through first wireless network with at rail vehicle terminal and is connected, at rail vehicle terminal passes through the second wireless network with the cloud platform and is connected, wherein:
a field terminal: detecting the structural mode and structural form of the track subgrade, and sending structural mode information and structural form information to a terminal of the on-track vehicle;
at the rail vehicle terminal: receiving structural modal information and structural form information sent by a field terminal, and transmitting the structural modal information and the structural form information to a cloud platform;
cloud platform: and receiving the structural modal information and the structural form information transmitted by the rail vehicle terminal, and sounding a damage alarm when the structural modal information and the structural form information exceed a preset safety range value.
The field terminal comprises a sensor module, an embedded computer module and a wireless communication module, wherein:
a sensor module: detecting the structural mode and structural form of the track subgrade, and sending structural mode data and structural form data to the embedded computer module;
embedded computer module: receiving the structural modal data and the structural form data sent by the sensor module, and sending structural modal information and structural form information to the wireless communication module;
the wireless communication module: and receiving the structural modal information and the structural form information sent by the embedded computer module, and taking the structural modal information and the structural form information as a plurality of data packets to be continuously transmitted to the rail vehicle terminal. The sensor module comprises at least one of an acceleration sensor, a speed sensor, an angle sensor, a temperature and humidity sensor and a stress strain sensor. The wireless communication module is an NFC communication module, a UWB communication module or a Bluetooth communication module.
According to the invention, the energy consumption of field terminal communication is greatly reduced through the mode, so that more energy consumption is transferred to the sensors at the field terminal, more sensors are laid on the track roadbed, the structural form and the structural mode of the track roadbed are monitored, the health condition of the track roadbed is monitored in many aspects, and for the detection condition, a worker can perform targeted maintenance and repair on the track roadbed according to the analysis early warning condition of the cloud platform, so that the driving safety is improved, and the road network maintenance efficiency is improved. Along with the removal of on-rail operation vehicle, the environment is abominable, the relatively poor road bed section's of network detected information also can go out through on-rail vehicle terminal transmission, can cover track road bed full network, has very high economy and practical value. The field terminal also comprises a power management module, and the power management module comprises a solar charging device.
Example 2
As shown in fig. 3, the difference between the present invention and embodiment 1 is that the field terminal includes a sensor module, a trigger module, a delay module, an embedded computer module, and a wireless communication module, wherein:
a sensor module: detecting the structural mode and structural form of the track subgrade, and sending structural mode data and structural form data to the embedded computer module;
a triggering module: sensing a signal of the on-rail vehicle, and transmitting the signal of the on-rail vehicle as a trigger signal to the embedded computer module;
a time delay module: receiving a delay instruction sent by the embedded computer module, and sending an ending instruction to the embedded computer module after timing is finished;
embedded computer module: receiving structural modal data and structural morphological data sent by a sensor module, receiving a trigger signal sent by a trigger module, sending structural modal information and structural morphological information to a wireless communication module as a trigger instruction by using the trigger signal, and sending a delay instruction to a delay module; receiving an ending instruction sent by the delay module, and sending a communication stopping instruction to the wireless communication module;
the wireless communication module: receiving structural modal information and structural form information sent by an embedded computer module, and transmitting the structural modal information and the structural form information to a rail vehicle terminal; and receiving a communication stopping instruction sent by the embedded computer module, and stopping working. The field terminal also comprises a power management module, and the power management module comprises an electromagnetic radiation charging device. In the area with small traffic flow or fast speed, the monitoring data is sent by adopting the triggering mode, namely when the vehicle passes through the field terminal, the field terminal transmits the monitoring data out, thereby avoiding communication waste and achieving the purpose of saving electricity.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. Monitoring system based on track roadbed structure hidden danger automatic monitoring method, its characterized in that includes at rail vehicle terminal, cloud platform and a plurality of field terminal of installing on the track roadbed, field terminal passes through first wireless network with at rail vehicle terminal and is connected, at rail vehicle terminal passes through the second wireless network with the cloud platform and is connected, wherein:
a field terminal: detecting the structural mode and structural form of the track subgrade, and sending structural mode information and structural form information to a terminal of the on-track vehicle;
at the rail vehicle terminal: receiving structural modal information and structural form information sent by a field terminal, and transmitting the structural modal information and the structural form information to a cloud platform;
cloud platform: receiving structural modal information and structural form information transmitted by a rail vehicle terminal, and sounding a damage alarm when the structural modal information and the structural form information exceed a preset safety range value;
the field terminal comprises a sensor module, a trigger module, a time delay module, an embedded computer module and a wireless communication module, wherein:
a sensor module: detecting the structural mode and structural form of the track subgrade, and sending structural mode data and structural form data to the embedded computer module;
a triggering module: sensing a signal of the on-rail vehicle, and transmitting the signal of the on-rail vehicle as a trigger signal to the embedded computer module;
a time delay module: receiving a delay instruction sent by the embedded computer module, and sending an ending instruction to the embedded computer module after timing is finished;
embedded computer module: receiving structural modal data and structural morphological data sent by a sensor module, receiving a trigger signal sent by a trigger module, sending structural modal information and structural morphological information to a wireless communication module as a trigger instruction by using the trigger signal, and sending a delay instruction to a delay module; receiving an ending instruction sent by the delay module, and sending a communication stopping instruction to the wireless communication module;
the wireless communication module: receiving structural modal information and structural form information sent by an embedded computer module, and transmitting the structural modal information and the structural form information to a rail vehicle terminal; and receiving a communication stopping instruction sent by the embedded computer module, and stopping working.
2. The monitoring system based on the rail subgrade structure hidden danger automatic monitoring method according to the claim 1, characterized in that the sensor module comprises at least one of an acceleration sensor, a speed sensor, an angle sensor, a temperature and humidity sensor and a stress and strain sensor.
3. The monitoring system based on the track roadbed structure hidden danger automatic monitoring method as claimed in claim 1, wherein the wireless communication module is an NFC communication module, a UWB communication module or a Bluetooth communication module.
4. The monitoring system based on the track subgrade structure hidden danger automatic monitoring method according to the claim 1, characterized in that the field terminal further comprises a power management module, and the power management module comprises a solar charging device.
5. The monitoring system based on the track subgrade structure hidden danger automatic monitoring method according to the claim 1, characterized in that the field terminal further comprises a power management module, and the power management module comprises an electromagnetic radiation charging device.
6. An automatic monitoring method for hidden danger of a track subgrade structure by applying the monitoring system based on the automatic monitoring method for hidden danger of the track subgrade structure as claimed in any one of claims 1 to 5, which is characterized by comprising the following steps:
a: presetting a structural modal safety range value and a structural form safety range value of a track subgrade in a cloud platform, and respectively establishing a structural modal damage alarm model and a structural form damage alarm model;
b: the method comprises the following steps that track subgrade changes when on-track running vehicles pass are used as dynamic excitation, a plurality of field terminals installed on the track subgrade are used for detecting structural modes and structural form characteristics of the track subgrade, and when the on-track running vehicles pass through the field terminals, the field terminals transmit structural mode information and structural form information to the on-track running vehicles;
c: and B, after the step B is finished, the vehicle running on the track transmits the structural modal information and the structural form information to the cloud platform, the cloud platform compares the data in the structural modal information and the structural form information with the structural modal safety range value and the structural form safety range value one by one, and if the data in the structural modal information and the structural form information exceed the preset safety range value, a damage alarm is sounded.
7. The method according to claim 6, wherein the structural mode includes a dynamic response characteristic of the track bed under a loading effect of a rail vehicle.
8. The method according to claim 7, wherein the structural configuration includes at least one of dynamic deflection amplitude, static stress strain, horizontal tilt and temperature and humidity status characteristics of the track bed.
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