Double-layer side beam, bogie and rail vehicle

Abstract

The invention relates to the technical field of railway vehicles, in particular to a double-layer side beam, a bogie and a railway vehicle. The double-layer side beam comprises a side beam body, the side beam body comprises a first side beam plate and a second side beam plate which are arranged in a stacked mode, and the second side beam plate is located on the top of the first side beam plate. And at least one detection assembly is embedded in the first side beam plate. The detection assembly is used for monitoring the stress state of the side beam body in real time and outputting a detection signal. The detection signal is used for judging the fracture risk of the side beam body. According to the double-layer side beam, the bogie and the rail vehicle, the stress state of the double-layer side beam can be monitored, so that judgment and early warning of the fracture risk of the double-layer side beam are achieved, and the running safety of the rail vehicle is improved.

Description

Double-layer side beams, bogies and rail vehicles Technical Field

[0001] This application relates to the field of rail vehicle technology, and in particular to a double-layer side beam, bogie, and rail vehicle. Background Technology

[0002] With accelerating urbanization and increasingly stringent environmental requirements, rail vehicles are evolving towards lightweight designs to reduce energy consumption, wheel-rail noise, and improve operational efficiency. As the core load-bearing and running component of rail vehicles, the structural safety of the bogie directly impacts the overall vehicle stability and passenger safety.

[0003] As the main load-bearing component of the bogie frame, the double-layer side beam is difficult to lighten due to the heavy weight of traditional metal materials (such as steel or aluminum alloys). In recent years, carbon fiber composite materials have been widely used in double-layer side beam structures due to their high strength and low density. However, their insufficient ability to monitor strain and provide early warning of fracture under complex working conditions has become a key bottleneck restricting their engineering application. Summary of the Invention

[0004] This application provides a double-layer side beam, bogie, and rail vehicle. The double-layer side beam, bogie, and rail vehicle can monitor the stress state of the double-layer side beam to determine and warn of the risk of fracture of the double-layer side beam, thereby improving the operational safety of the rail vehicle.

[0005] In a first aspect, embodiments of this application provide a double-layer side beam, the double-layer side beam comprising:

[0006] The side beam body includes a first side beam plate and a second side beam plate stacked together, with the second side beam plate located on top of the first side beam plate;

[0007] The detection component is embedded inside the first side beam plate; the detection component is used to monitor the stress state of the side beam body in real time and output a detection signal; the detection signal is used to determine the risk of fracture of the side beam body.

[0008] This application provides a double-layer side beam that integrates at least one detection component embedded within the first side beam plate with the beam body, enabling real-time monitoring of the beam body's stress state and early warning of fracture tendency. When the side beam body is subjected to external loads, the load is transferred to the first side beam plate via the second side beam plate, causing changes in the stress distribution within the first side beam plate. The detection component embedded in the first side beam plate responds accordingly, converting the stress distribution changes into collectable and analyzable detection signals, thereby assessing the stress state of the side beam body and determining the fracture risk.

[0009] Therefore, the double-layer side beam provided in this application can monitor the stress state of the double-layer side beam, so as to realize the judgment and early warning of the risk of fracture of the double-layer side beam, thereby improving the safety of rail vehicle operation.

[0010] In some possible embodiments of this application, the detection component includes an optical fiber and at least two grating sensors, the optical fiber extending along a first direction and the grating sensors being arranged at intervals along the first direction; the optical fiber is connected to the grating sensors.

[0011] In some possible embodiments of this application, the first side beam plate has a first support portion and two second support portions, and in a first direction, the two second support portions are disposed on both sides of the first support portion;

[0012] The grating sensor is located inside the first support and at least one second support, respectively.

[0013] In some possible embodiments of this application, the detection component further includes a connector;

[0014] In the first direction, the optical fiber extends to the outside of a second support on the side opposite to the first support and is connected to an external device via a connector; the external device is used to receive detection signals.

[0015] In some possible embodiments of this application, the detection component includes three grating sensors, with one grating sensor on each of the first support and two second supports.

[0016] In some possible embodiments of this application, four detection components are provided inside the first side beam plate;

[0017] In the second direction, two detection components are respectively installed on both sides of the first side beam plate.

[0018] In some possible embodiments of this application, two detection components near the top of the first side beam are spaced apart along a third direction;

[0019] Two detection components, which are away from the top of the first side beam, are spaced apart along the third direction and correspond to the two detection components that are close to the top of the first side beam.

[0020] Two detection components near the top of the first side beam and two detection components away from the top of the first side beam are symmetrically arranged along the center plane of the first side beam.

[0021] In some possible embodiments of this application, at least one detection component is embedded inside the second side beam plate.

[0022] In some possible embodiments of this application, the first side beam plate is provided with two detection components, which are spaced apart inside the first side beam plate along a third direction;

[0023] The second side beam is equipped with two detection components, which are spaced apart inside the second side beam along a third direction.

[0024] Secondly, embodiments of this application provide a bogie, which includes a crossbeam and two double-layer side beams as described in any embodiment of the first aspect; the double-layer side beams are spaced apart along a third direction, and the crossbeam connects the two double-layer side beams.

[0025] This application provides a bogie that includes the double-layer side beams provided in any of the embodiments of the first aspect. Therefore, the double-layer side beams used in this vehicle bogie also have the same technical effect as the double-layer side beams provided in the first aspect, namely, they can monitor the stress state of the double-layer side beams to realize the judgment and early warning of the risk of fracture of the double-layer side beams, thereby improving the operational safety of rail vehicles.

[0026] Thirdly, embodiments of this application provide a rail vehicle including the bogie as described in the second aspect.

[0027] This application provides a rail vehicle that includes the bogie provided in the second aspect embodiment. Therefore, the bogie used in this rail vehicle also has the same technical effect as the bogie provided in the second aspect, namely, it can monitor the stress state of the double-layer side beams to realize the judgment and early warning of the risk of fracture of the double-layer side beams, thereby improving the operational safety of the rail vehicle. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 is a structural schematic diagram of the double-layer side beam provided in this application;

[0030] Figure 2 is a front view of the double-layer side beam provided in this application;

[0031] Figure 3 is a top sectional view of the first side beam plate provided in this application;

[0032] Figure 4 is a front sectional view of the first side beam plate provided in this application.

[0033] Figure label:

[0034] 100 - Side beam body; 110 - First side beam plate; 111 - First support part; 112 - Second support part; 120 - Second side beam plate; 121 - Third support part; 122 - Fourth support part; 130 - Buffer gap; 140 - Elastic stop;

[0035] 200 - Detection component; 210 - Optical fiber; 220 - Grating sensor; 230 - Connector;

[0036] X - First direction;

[0037] Y - Second direction;

[0038] Z - Third-party orientation. Detailed Implementation

[0039] In the description of the embodiments of this application, it should be understood that the terms "comprising" and "having" as used herein, and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, display structure, product, or device that includes a step or unit is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0040] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "electrical connection," etc. (if applicable) should be interpreted broadly. For example, they can refer to a fixed electrical connection, an indirect connection through an intermediate medium, or the internal connection of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0041] The terms “left,” “right,” “top,” “bottom,” “inner,” “outer,” etc. (if present) in the specification and claims of this application indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0042] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0043] In the embodiments of this application, the words "exemplarily" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplarily" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design solutions. Specifically, the use of the words "exemplarily" or "for example" is intended to present the relevant concepts in a specific manner.

[0044] This application provides a rail vehicle. It should be noted that this application does not limit the type of rail vehicle. For example, the rail vehicle in this application can be a subway, a high-speed train, a regular train, or other types of vehicles.

[0045] With the development of urbanization, rail vehicles, as a major mode of public transportation, are playing an increasingly important role compared to automobiles in alleviating traffic congestion and promoting energy conservation and environmental protection. As energy conservation and environmental protection requirements become more stringent, rail vehicles are developing towards lightweight designs to reduce energy consumption, wheel-rail noise, and improve operational efficiency.

[0046] As the core load-bearing and running component of a rail vehicle, the structural safety of the bogie directly affects the overall vehicle stability and passenger safety. The bogie consists of crossbeams and side beams, which bear loads and connect various components.

[0047] Among them, the side beam is the main load-bearing component of the bogie. Traditionally, the side beam is usually made of metal materials (such as steel or aluminum alloy), but metal materials are heavy and difficult to meet the requirements of lightweighting.

[0048] In recent years, carbon fiber composites have been widely used in side beam structures due to their high strength and low density. However, their insufficient ability to monitor strain state and provide early warning of fracture under complex working conditions has become a key bottleneck restricting their engineering application.

[0049] Currently, strain monitoring of side beams mainly relies on external flaw detection equipment (such as ultrasonic testing and X-ray testing), which requires manual inspection after the vehicle is stopped, making online real-time monitoring impossible. Furthermore, traditional sensors (such as strain gauges) must be installed on the side beam surface by adhesive bonding or welding, resulting in problems such as easy detachment, poor durability, and inability to detect internal strain. Moreover, the strain distribution of composite material side beams is affected by factors such as material anisotropy and ply direction, making it difficult for existing detection methods to comprehensively cover critical areas, leading to inaccurate monitoring results.

[0050] Therefore, how to monitor the stress state of the side beam in real time in order to judge and warn of the risk of side beam fracture, thereby improving the safety of rail vehicle operation, is a technical problem that urgently needs to be solved.

[0051] In view of this, embodiments of this application provide a double-layer side beam, bogie, and rail vehicle. The double-layer side beam includes a side beam body and a detection component. By embedding at least one detection component inside the first side beam plate, the detection component and the side beam body are integrated to achieve real-time monitoring of the stress state of the side beam body and early warning of fracture tendency. When the side beam body is subjected to external loads, the load is transferred to the first side beam plate via the second side beam plate, causing changes in the stress distribution inside the first side beam plate. The detection component embedded in the first side beam plate responds accordingly, converting the stress distribution change into a detection signal that can be collected and analyzed, thereby assessing the stress state of the side beam body and judging the fracture risk, thus improving the operational safety of the rail vehicle.

[0052] The following description, in conjunction with the accompanying drawings and embodiments, further elaborates on a double-layer side beam provided in the present application.

[0053] Referring to Figures 1 and 2, an embodiment of this application provides a double-layer side beam, including a side beam body 100 and a detection component 200.

[0054] The side beam body 100 includes a first side beam plate 110 and a second side beam plate 120 stacked together, with the second side beam plate 120 located on top of the first side beam plate 110. At least one detection component 200 is embedded within the first side beam plate 110. The detection component 200 is used to monitor the stress state of the side beam body 100 in real time and output a detection signal. The detection signal is used to determine the risk of fracture of the side beam body 100.

[0055] Specifically, when the side beam body 100 is subjected to external loads (such as the weight of a rail vehicle body, cargo or passenger weight, and vibration), the external load is first transmitted through the second side beam plate 120 to the first side beam plate 110, which is the main load-bearing structure, causing the side beam body 100 to generate corresponding deformation and internal stress. The detection component 200 embedded in the first side beam plate 110 senses the deformation or stress in real time and converts it into a detection signal output that characterizes the stress state.

[0056] For example, the detection component 200 can be connected to an external device, and the detection component 200 transmits detection signals to the external device. The external device collects and analyzes the detection signals to assess the stress state of the side beam body 100.

[0057] By monitoring the stress level and distribution changes of the side beam body 100 in real time, it is possible to determine whether the side beam body 100 has the risk of fracture such as crack initiation, propagation or overload, and realize online diagnosis and early warning of its structural health status.

[0058] Furthermore, by embedding the detection component 200 inside the first side beam plate 110, the detection component 200 is integrated with the side beam body 100, thus providing internal protection for the detection component 200 and solving problems such as easy detachment, poor durability, and inability to detect internal strain. The detection component 200 significantly improves the reliability and durability of monitoring, ultimately achieving preventative safety monitoring of the fracture risk of the side beam body 100.

[0059] This application provides a double-layer side beam, which integrates at least one detection component 200 embedded within the first side beam plate 110 with the side beam body 100, enabling real-time monitoring of the stress state of the side beam body 100 and early warning of fracture tendency. When the side beam body 100 is subjected to external loads, the load is transmitted to the first side beam plate 110 via the second side beam plate 120, causing changes in the stress distribution within the first side beam plate 110. The detection component 200 embedded in the first side beam plate 110 responds accordingly, converting the stress distribution change into a detection signal that can be collected and analyzed, thereby assessing the stress state of the side beam body 100 and determining the fracture risk.

[0060] Therefore, the double-layer side beam provided in this application can monitor the stress state of the double-layer side beam, so as to realize the judgment and early warning of the risk of fracture of the double-layer side beam, thereby improving the safety of rail vehicle operation.

[0061] For example, both the first side beam plate 110 and the second side beam plate 120 are made of elastic composite fiber materials, such as carbon fiber composite materials, glass fiber composite materials, or carbon fiber and glass fiber composite materials. In this application, the materials of the first side beam plate 110 and the second side beam plate 120 are not further limited, only needing to meet the strength and stiffness requirements of the side beam body 100.

[0062] Referring to Figures 3 and 4, in some possible embodiments of this application, the detection component 200 includes an optical fiber 210 and at least two grating sensors 220. The optical fiber 210 extends along a first direction X, and the grating sensors 220 are arranged at intervals along the first direction X. The optical fiber 210 and the grating sensors 220 are connected to each other, thereby forming a sensing network.

[0063] During operation, when the side beam body 100 is subjected to load and deforms, the deformation is directly transmitted to the optical fiber 210 and grating sensor 220 embedded inside the first side beam plate 110. Each grating sensor 220 senses the local strain at its location, causing a change in the grating pitch of the grating sensor 220, thereby modulating the wavelength of the reflected light wave and producing a wavelength shift.

[0064] The wavelength shift refers to the change in the center wavelength of the light signal reflected by the grating sensor 220 relative to its initial wavelength when it is not deformed.

[0065] Specifically, the external device can emit a broadband optical pulse, which propagates along optical fiber 210. When the broadband optical pulse passes through grating sensor 220, grating sensor 220 selectively reflects light of a specific wavelength according to its inherent grating pitch, while light of other wavelengths continues to propagate along optical fiber 210. The light reflected back from grating sensor 220 returns to the external device along the same optical fiber 210.

[0066] External equipment can measure the center wavelength of the light reflected back from the grating sensor 220. By comparing the real-time monitored center wavelength value with the initial wavelength value, the external equipment calculates the wavelength drift at each monitoring position, thereby reflecting the strain changes inside the side beam body 100.

[0067] By monitoring and analyzing these wavelength drifts in real time, the strain distribution inside the first side beam plate 110 can be accurately reflected, thereby enabling the measurement of the stress state of the side beam body 100 and the precise location and early warning of fracture risk.

[0068] In some possible embodiments of this application, the first side beam plate 110 has a first support portion 111 and two second support portions 112, with the two second support portions 112 disposed on both sides of the first support portion 111 in the first direction X.

[0069] The grating sensor 220 is located inside the first support portion 111 and at least one second support portion 112, respectively.

[0070] For example, the double-layer side beam includes a first side beam plate 110 and a second side beam plate 120. The first side beam plate 110 and the second side beam plate 120 are stacked, with the second side beam plate 120 located on top of the first side beam plate 110.

[0071] The first side beam 110 has a first support portion 111 and two second support portions 112, with the two second support portions 112 disposed on both sides of the first support portion 111 in the first direction X. The second side beam 120 may have a third support portion 121 and two fourth support portions 122, with the two fourth support portions 122 disposed on both sides of the third support portion 121 in the first direction X.

[0072] The top of the first support portion 111 contacts the bottom of the third support portion 121, and a buffer gap 130 is provided between the second support portion 112 and the fourth support portion 122. In the first direction X, elastic stops 140 are provided at both ends of the side of the second side beam plate 120 facing the first side beam plate 110, and are located within the buffer gap 130.

[0073] The bottom of the first support part 111 and the top of the third support part 121 are both equipped with positioning pins. The first support part 111 is connected to the crossbeam through the positioning pins, and the third support part 121 is connected to the suspension system of the rail vehicle through the positioning pins.

[0074] When the side beam body 100 is not under load, the elastic stop 140 has a gap with the side of the first side beam plate 110 facing the second side beam plate 120. When the side beam body 100 is under a small load, the first side beam plate 110 undergoes a slight deformation, and the elastic stop 140 still has a gap with the side of the first side beam plate 110 facing the second side beam plate 120. At this time, the load is mainly borne by the first side beam plate 110. When the side beam body 100 is under a large load, both the first side beam plate 110 and the second side beam plate 120 deform, and the elastic stop 140 comes into contact with the side of the first side beam plate 110 facing the second side beam plate 120. At this time, the load is jointly borne by the first side beam plate 110 and the second side beam plate 120.

[0075] The grating sensor 220 is respectively built into the first support 111 and at least one second support 112, so that the grating sensor 220 can cover the main load-bearing area and the transition area of ​​the side beam body 100.

[0076] During operation, when a load is applied to the side beam body 100, the strain response of each key part can be detected simultaneously by detecting the signals of the grating sensor 220 located in the first support part 111 in the main load-bearing area and the second support part 112 located in the edge or connecting transition area. This provides a more comprehensive and reliable data basis for judging the health status and fracture risk of the side beam body 100.

[0077] In some possible embodiments of this application, the detection assembly 200 further includes a connector 230. In the first direction X, the optical fiber 210 extends to the exterior of a second support 112 on the side opposite to the first support 111, and connects to an external device via the connector 230. The external device is used to receive the detection signal.

[0078] During operation, when the side beam body 100 is subjected to load and deforms, the grating sensors 220 built into the first support part 111 and the second support part 112 synchronously sense the local strain at their respective locations and convert the mechanical signal into an optical signal. The optical signals generated by all the grating sensors 220 are collected and transmitted via the built-in optical fiber 210, which extends along the first direction X as a signal transmission channel and finally passes through the second support part 112 to be guided to the outside of the side beam body 100.

[0079] The end of the optical fiber 210 extending to the outside of the side beam body 100 is provided with a connector 230. Through the connector 230 at the end of the optical fiber 210, the optical signal carrying the real-time stress state information inside the side beam can be efficiently and reliably coupled to the external device. The external device completes the parsing and data analysis of the optical signal, thereby realizing the continuous monitoring of the health status of the side beam body 100.

[0080] Furthermore, detachable electrical and mechanical connections can be established between the connector 230, the optical fiber 210, and external devices, reducing the difficulty of system installation, maintenance, and replacement.

[0081] In some possible embodiments of this application, the detection component 200 includes three grating sensors 220, with one grating sensor 220 provided on each of the first support portion 111 and the two second support portions 112.

[0082] When the side beam body 100 is subjected to external load, the grating sensor 220 simultaneously detects the real-time strain status of the first support 111 and the two second supports 112. By arranging multiple grating sensors 220 in key areas of the side beam body 100, a high-density monitoring point is formed, thereby accurately capturing local strain changes in high-risk areas of the side beam body 100, significantly improving the comprehensiveness of the health status assessment of the side beam body 100, the accuracy of fracture risk location, and the timeliness of early warning.

[0083] For example, in the first direction X, the distance between the grating sensor 220 provided on the second support portion 112 and the end of the second support portion 112 facing away from the first support portion 111 is 405 mm. The distance between the grating sensor 220 provided on the first support portion 111 and the end of the second support portion 112 facing away from the first support portion 111 is 1010 mm.

[0084] In the second direction Y, the distance between the grating sensor 220 located on the second support portion 112 and the top of the second support portion 112 is 44 mm. The distance between the grating sensor 220 located on the first support portion 111 and the top of the first support portion 111 is 15 mm.

[0085] In this application, the position of the grating sensor 220 is not further limited, only needing to meet the detection requirements of the side beam body 100.

[0086] In some possible embodiments of this application, four detection components 200 are provided inside the first side beam plate 110. Specifically, in the second direction Y, two detection components 200 are provided on each side of the first side beam plate 110.

[0087] The four detection components 200 can simultaneously sense the strain response of the first side beam 110 at different positions in the second direction Y, thereby improving the accuracy of fracture early warning and realizing comprehensive monitoring of high-risk areas.

[0088] In some possible embodiments of this application, two detection components 200 near the top of the first side beam 110 are spaced apart along a third direction (Z). Two detection components 200 away from the top of the first side beam 110 are spaced apart along a third direction (Z) and correspond to the two detection components 200 near the top of the first side beam 110. The two detection components 200 near the top of the first side beam 110 and the two detection components 200 away from the top of the first side beam 110 are symmetrically arranged along the center plane of the first side beam 110.

[0089] When the side beam body 100 is subjected to external loads, the detection component 200 can more accurately capture the strain response of the side beam body 100 in the second direction Y and the third direction Z. By symmetrically arranging the detection components 200, installation errors can be eliminated, thereby achieving comprehensive monitoring of high-risk areas and improving the accuracy of fracture early warning.

[0090] For example, on the third direction Z, the distance between the side of the first side beam plate 110 and the adjacent detection component 200 is 32mm.

[0091] In this application, the position of the detection component 200 is not further limited, as long as it meets the detection requirements of the side beam body 100.

[0092] In some possible embodiments of this application, at least one detection component 200 is embedded inside the second side beam plate 120.

[0093] When the side beam body 100 is under load, the detection component 200 can simultaneously acquire the detection data of the first side beam plate 110 and the second side beam plate 120. Through the coordinated monitoring of the first side beam plate 110 and the second side beam plate 120, the stress changes at different locations of the side beam body 100 are covered, realizing strain monitoring of the entire area of ​​the side beam body 100, improving the ability to assess the overall health status of the side beam, and adapting to the needs of complex working conditions.

[0094] In some possible embodiments of this application, the first side beam plate 110 is provided with two detection components 200, which are spaced apart along the third direction Z inside the first side beam plate 110. The second side beam plate 120 is provided with two detection components 200, which are spaced apart along the third direction Z inside the second side beam plate 120.

[0095] By employing detection components 200 respectively arranged inside the first side beam plate 110 and the second side beam plate 120 along the third direction Z, the detection components 200 can synchronously sense and acquire local detection data at different positions along the third direction Z. These detection components 200 together constitute a three-dimensional monitoring network covering the key areas of the side beam body 100, realizing strain monitoring of the entire side beam area and adapting to stress changes in different load directions.

[0096] Furthermore, embodiments of this application provide a bogie, which includes a crossbeam and two double-layer side beams as mentioned in any of the embodiments above. The double-layer side beams are spaced apart along a third direction Z, and the crossbeam connects the two double-layer side beams.

[0097] Since the bogie provided in this application includes the double-layer side beams provided in any embodiment of this application, the bogie provided in this application has the same effect, namely, it can monitor the stress state of the double-layer side beams, so as to realize the judgment and early warning of the risk of fracture of the double-layer side beams, thereby improving the safety of rail vehicle operation.

[0098] Meanwhile, embodiments of this application provide a rail vehicle including a bogie as mentioned in any of the embodiments above.

[0099] Since the rail vehicle provided in this application includes the bogie provided in any embodiment of this application, the rail vehicle provided in this application has the same effect, namely, it can monitor the stress state of the double-layer side beams, so as to realize the judgment and early warning of the risk of fracture of the double-layer side beams, thereby improving the operational safety of the rail vehicle.

[0100] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them; although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A double-layer side beam, characterized in that, include: The side beam body (100) includes a first side beam plate (110) and a second side beam plate (120) stacked together, the second side beam plate (120) being located on top of the first side beam plate (110); a detection component (200) is provided inside the first side beam plate (110); the detection component (200) is used to monitor the stress state of the side beam body (100) in real time and output a detection signal; the detection signal is used to determine the risk of fracture of the side beam body (100).

2. The double-layer side beam according to claim 1, characterized in that, The detection component (200) includes an optical fiber (210) and at least two grating sensors (220), the optical fiber (210) extending along the first direction, and the grating sensors (220) being arranged at intervals along the first direction; the optical fiber (210) is connected to the grating sensors (220).

3. The double-layer side beam according to claim 2, characterized in that, The first side beam plate (110) has a first support portion (111) and two second support portions (112). In a first direction, the two second support portions (112) are respectively disposed on both sides of the first support portion (111); the grating sensor (220) is located inside the first support portion (111) and at least one of the second support portions (112).

4. The double-layer side beam according to claim 3, characterized in that, The detection assembly (200) further includes a connector (230); in a first direction, the optical fiber (210) extends to the outside of a second support (112) on the side opposite to the first support (111), and is connected to an external device via the connector (230); the external device is used to receive the detection signal.

5. The double-layer side beam according to claim 3, characterized in that, The detection component (200) includes three grating sensors (220), with one grating sensor (220) on each of the first support (111) and the two second support parts (112).

6. The double-layer side beam according to claim 1, characterized in that, The first side beam plate (110) is provided with four detection components (200); wherein, in the second direction, two detection components (200) are respectively provided on both sides of the first side beam plate (110).

7. The double-layer side beam according to claim 6, characterized in that, Two detection components (200) near the top of the first side beam plate (110) are spaced apart along a third direction; two detection components (200) away from the top of the first side beam plate (110) are spaced apart along a third direction and correspond to the two detection components (200) near the top of the first side beam plate (110); the two detection components (200) near the top of the first side beam plate (110) and the two detection components (200) away from the top of the first side beam plate (110) are symmetrically arranged along the center plane of the first side beam plate (110).

8. The double-layer side beam according to claim 1, characterized in that, At least one of the detection components (200) is embedded inside the second side beam plate (120).

9. The double-layer side beam according to claim 8, characterized in that, The first side beam plate (110) is provided with two detection components (200), which are spaced apart along a third direction inside the first side beam plate (110); the second side beam plate (120) is provided with two detection components (200), which are spaced apart along a third direction inside the second side beam plate (120).

10. A bogie, characterized in that, It includes a crossbeam and two double-layer side beams as described in any one of claims 1-9; the double-layer side beams are spaced apart along a third direction, and the crossbeam connects the two double-layer side beams.

11. A rail vehicle, characterized in that, Includes the bogie as described in claim 10.

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