Environmental wind speed testing device, rail train and vehicle speed control method

Abstract

The present disclosure provides an environmental wind speed testing device, which is suitable for being assembled on a rail train and comprises a wind measuring unit arranged on the rail train, the wind measuring unit being suitable for obtaining an environmental wind parameter of an environmental wind passing through the rail train; a first database, which obtains aerodynamic load data of the rail train according to the environmental wind parameter and a real-time vehicle speed of the rail train; a second database, which obtains dynamic data of the rail train according to the aerodynamic load data and the real-time vehicle speed; and a warning unit, which judges a running state of the rail train according to the dynamic data and outputs prompt information in response to the running state; wherein the environmental wind parameter at least includes a wind direction and a wind speed of the environmental wind.

Description

Technical Field

[0001] This disclosure relates to the fields of wind measurement lidar technology and rail train technology, and more specifically, to an environmental wind speed testing device, a rail train and a speed control method. Background Technology

[0002] As the operating speed of rail trains continues to increase, the impact of ambient wind on their driving stability and passenger comfort is becoming increasingly significant. In particular, the aerodynamic performance parameters of rail trains, such as lateral force, lift, overturning moment, and pitching moment, are becoming increasingly sensitive to ambient wind.

[0003] In realizing the present invention, the inventors discovered at least the following problems in the related technology: Currently, railway departments mainly rely on data from meteorological departments to test wind conditions in the train operating environment. This approach relies on weather forecasts, gale warnings, and years of accumulated meteorological data to predict the environmental wind conditions in a certain area or train section, thereby guiding train speed. However, this empirically based method lacks real-time capability and cannot provide temporary warnings for sudden crosswinds.

[0004] Therefore, obtaining the magnitude and direction of the ambient wind quickly, accurately, and in real time is of great significance for judging the aerodynamic forces and torques acting on the train during operation and guiding the driver to adjust the speed. Summary of the Invention

[0005] In view of this, the present disclosure provides a device for real-time monitoring of the wind conditions around a rail train, an environmental wind speed testing device, a rail train, and a method for controlling the speed of the rail train.

[0006] One aspect of this disclosure provides an environmental wind speed testing device suitable for mounting on a railcar, comprising: a wind measurement unit disposed on the railcar, adapted to obtain environmental wind parameters of the environmental wind passing through the railcar; a first database for acquiring aerodynamic load data of the railcar based on the environmental wind parameters and the real-time speed of the railcar; a second database for acquiring dynamic data of the railcar based on the aerodynamic load data and the real-time speed; and an early warning unit for determining the operating status of the railcar based on the dynamic data and outputting a prompt message in response to the operating status; wherein the environmental wind parameters include at least the wind direction and wind speed of the environmental wind.

[0007] According to an embodiment of this disclosure, the wind measuring unit includes a wind measuring radar disposed on the top of the railcar. The wind measuring radar includes a housing configured as a streamlined shape with a smooth curved surface; a laser component disposed within the housing, adapted to emit laser light and receive echo signals; and a light-transmitting component mounted on the housing and disposed facing the emitting end of the laser component, adapted to accommodate the laser light transmitted to the outside of the housing and to accommodate the echo signals returning to the receiving end of the laser component.

[0008] According to an embodiment of this disclosure, the laser component includes: a laser, a beam splitter, an acousto-optic modulator, an amplifier, and a telescope; the initial laser emitted by the laser is split into a local oscillator beam and an emitted laser beam by the beam splitter, and the emitted laser beam is modulated by the acousto-optic modulator and the amplifier and then emitted through the telescope; wherein, the telescope is also used to receive the echo signal.

[0009] According to embodiments of this disclosure, the laser assembly further includes a circulator installed between the amplifier and the telescope, suitable for separating the emitted laser and the echo signal.

[0010] According to an embodiment of this disclosure, the laser component includes two telescopes configured to be symmetrically arranged at a preset angle along the direction of travel of the railcar, such that the lasers emitted by the two telescopes intersect directly in front of the wind measuring radar, thereby increasing the wind measuring range.

[0011] According to an embodiment of this disclosure, the wind measurement unit further includes a processing component disposed inside the railcar. The processing component is communicatively connected to the laser component and is adapted to acquire the environmental wind parameters based on the local oscillator light and the echo signal.

[0012] According to an embodiment of this disclosure, the processing component includes a signal converter, an optical mixer, and a data processor; wherein the signal converter is adapted to convert the beat frequency signal of the local oscillator light and the echo signal into an intermediate frequency electrical signal, and the intermediate frequency electrical signal is coupled and sampled by the optical mixer and then analyzed by the data processor to obtain the environmental wind parameters.

[0013] According to embodiments of this disclosure, the light-transmitting component is configured to have a preset pitch angle with the horizontal plane to block at least a portion of external reflected light from entering the laser component.

[0014] According to embodiments of this disclosure, the angle between the light-transmitting component and the horizontal plane is between 30° and 45°.

[0015] According to an embodiment of the present disclosure, the light-transmitting component includes a light window; and a light window mounting portion adapted to fix the light window and mount the light window onto the housing.

[0016] According to an embodiment of this disclosure, the wind measuring radar further includes a base plate installed at the bottom of the housing; and a sealing gasket installed between the housing and the base plate, suitable for sealing the housing and the base plate.

[0017] According to embodiments of this disclosure, the environmental wind speed testing device further includes an adapter plate, which is suitable for mounting the aforementioned wind measuring radar onto the aforementioned railcar mounting interface structure.

[0018] Another aspect of this disclosure provides a rail train, including a car body on which the aforementioned environmental wind speed testing device is mounted.

[0019] Another aspect of this disclosure provides a speed control method, comprising: acquiring ambient wind parameters and real-time speed of the rail train; acquiring aerodynamic load data of the rail train in a first database based on the ambient wind parameters and the real-time speed; acquiring dynamic data of the rail train in a second database based on the aerodynamic load data and the real-time speed; determining the operating state of the rail train based on the dynamic data and outputting a prompt message in response to the operating state; and adjusting the speed of the rail train based on the prompt message.

[0020] According to embodiments of this disclosure, an environmental wind speed testing device is installed on a rail train. The wind measurement unit acquires real-time environmental wind parameters around the rail train, including wind direction and speed. Aerodynamic load data of the rail train is obtained based on a first database combined with the real-time train speed. Then, dynamic data of the rail train is further obtained using the real-time speed and aerodynamic load data from a second database. An early warning unit determines the train's operating status based on the dynamic data and outputs prompts as a basis for adjusting the rail train. This significantly improves the response speed and accuracy of the rail train to the influence of environmental wind, thereby enhancing the safety of rail train operation and passenger comfort. Attached Figure Description

[0021] The above and other objects, features and advantages of this disclosure will become clearer from the following description of embodiments with reference to the accompanying drawings, in which:

[0022] Figure 1 This schematic diagram illustrates the installation structure of an environmental wind speed testing device according to an embodiment of the present disclosure;

[0023] Figure 2 An exploded three-dimensional view of a wind-measuring radar according to an embodiment of the present disclosure is shown schematically.

[0024] Figure 3 A schematic diagram of the structure of a wind measuring unit according to an embodiment of the present disclosure is shown;

[0025] Figure 4 A schematic top view of a laser assembly according to an embodiment of the present disclosure is shown;

[0026] Figure 5 A schematic diagram illustrating the test range of a wind-measuring radar according to an embodiment of the present disclosure is shown.

[0027] Figure 6 A schematic diagram illustrating the test range of a wind-measuring radar according to another embodiment of the present disclosure is shown.

[0028] Figure 7 A schematic cross-sectional view of the installation structure of an environmental wind speed testing apparatus according to an embodiment of the present disclosure is shown.

[0029] Figure 8 yes Figure 7 Enlarged view of point A in the middle;

[0030] Figure 9 yes Figure 7 Enlarged view of point B in the middle; and

[0031] Figure 10 A flowchart illustrating a vehicle speed control method according to an embodiment of the present disclosure is shown schematically.

[0032] In the accompanying drawings, the meanings of the reference numerals are as follows:

[0033] 1. Rail train;

[0034] 11. Mounting platform;

[0035] 111. Install the interface;

[0036] 2. Wind measurement unit;

[0037] 3. Wind measuring radar;

[0038] 31. Shell;

[0039] 32. Laser components;

[0040] 321. Laser;

[0041] 322. Beam splitter;

[0042] 323. Acousto-optic modulator;

[0043] 324. Amplifier;

[0044] 325. Telescope;

[0045] 3251. Mounting bracket;

[0046] 326. Circulator;

[0047] 327. Light source integration;

[0048] 33. Light-transmitting components;

[0049] 331. Light window;

[0050] 332. Light window installation department;

[0051] 3321. Light window seat;

[0052] 3322, Light Window Cover;

[0053] 3323, Positioning pin;

[0054] 34. Base plate;

[0055] 35. Sealing gasket;

[0056] 36. Line exit;

[0057] 4. Laser receiving component;

[0058] 41. Optical mixer;

[0059] 42. Data processor;

[0060] 43. Display terminal; and

[0061] 5. Adapter board. Detailed Implementation

[0062] The embodiments of the present disclosure will now be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the disclosure. In the following detailed description, numerous specific details are set forth to provide a thorough understanding of the embodiments of the present disclosure for ease of explanation. However, it will be apparent that one or more embodiments may be practiced without these specific details. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concepts of the present disclosure.

[0063] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0064] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0065] When using expressions such as "at least one of A, B and C", they should generally be interpreted in accordance with the meaning that is commonly understood by those skilled in the art (e.g., "a system having at least one of A, B and C" should include, but is not limited to, a system having A alone, a system having B alone, a system having C alone, a system having A and B, a system having A and C, a system having B and C, and / or a system having A, B and C, etc.).

[0066] Figure 1 A schematic diagram of the installation structure of an environmental wind speed testing device according to an embodiment of the present disclosure is shown.

[0067] Embodiments of this disclosure provide an environmental wind speed testing device, such as... Figure 1 As shown, this embodiment is applicable to an environmental wind speed testing device mounted on a railcar 1, comprising: a wind measuring unit 2, disposed on the railcar 1, suitable for obtaining environmental wind parameters of the environmental wind passing through the railcar 1; a first database, for obtaining aerodynamic load data of the railcar 1 based on the environmental wind parameters and the real-time speed of the railcar 1; a second database, for obtaining dynamic data of the railcar 1 based on the aerodynamic load data and the real-time speed; and an early warning unit, for determining the operating status of the railcar 1 based on the dynamic data and outputting prompt information in response to the operating status; wherein, the environmental wind parameters include at least the wind direction and wind speed of the environmental wind.

[0068] According to the above setup, an environmental wind speed testing device is installed on the railcar. The wind measurement unit acquires real-time environmental wind parameters around the railcar, including wind direction and wind speed. Based on a first database and the real-time speed of the railcar, aerodynamic load data of the railcar is obtained. Then, based on a second database, the dynamic data of the railcar is further obtained using the real-time speed and aerodynamic load data. The early warning unit judges the train's operating status based on the dynamic data and outputs prompt information. This significantly improves the response speed and accuracy of the railcar to the influence of environmental wind, thereby enhancing the safety of railcar operation and passenger comfort.

[0069] In one illustrative embodiment, the first database and the second database are pre-embedded in the train database of the railcar.

[0070] In one illustrative embodiment, by combining test data of "real-time vehicle speed + wind speed + wind direction", the real-time aerodynamic load data of the rail train can be quickly retrieved in the first database. The aerodynamic load data includes data such as aerodynamic drag, aerodynamic lift, aerodynamic lateral force, roll moment, yaw moment and pitch moment.

[0071] In one illustrative embodiment, by combining test data of "real-time vehicle speed + aerodynamic load data", the real-time dynamic data of the railcar can be quickly retrieved in the second database. The dynamic data includes data such as derailment coefficient, wheel load reduction rate, wheel load lateral force, stability index, and vehicle attitude angle.

[0072] Figure 2 An exploded three-dimensional view of a wind-measuring radar according to an embodiment of the present disclosure is shown schematically.

[0073] In one illustrative embodiment, such as Figure 2 As shown, the wind measuring unit 2 includes a wind measuring radar 3, which is located on the top of the railcar 1 and includes a housing 31, which is constructed into a streamlined shape with a smooth curved surface; a laser component 32, which is located inside the housing 31 and is suitable for emitting laser and receiving echo signals; and a light-transmitting component 33, which is mounted on the housing 31 and is positioned facing the emitting end of the laser component 32, suitable for accommodating laser transmission to the outside of the housing 31 and accommodating echo signals returning to the receiving end of the laser component 32.

[0074] According to the above configuration, the wind measuring radar 3 is installed on the top of the railcar 1 and uses a streamlined housing 31, which protects the internal structure while reducing air resistance and ensuring the aerodynamic stability of the railcar 1 when it is running at high speed. The cooperation between the laser component 32 and the light-transmitting component 33 ensures accurate measurement of the ambient wind parameters and improves the real-time performance and accuracy of the data. This integrated design of the wind measuring unit 2 provides the railcar with real-time ambient wind monitoring capabilities.

[0075] Figure 3 A schematic diagram of the structure of a wind measurement unit according to an embodiment of the present disclosure is shown.

[0076] In one illustrative embodiment, such as Figure 3 As shown, the laser assembly 32 includes: a laser 321, a beam splitter 322, an acousto-optic modulator 323, an amplifier 324, and a telescope 325; the initial laser emitted from the laser 321 is split into a local oscillator beam and an emitted laser beam by the beam splitter 322, and the emitted laser beam is modulated by the acousto-optic modulator 323 and the amplifier 324 and then emitted through the telescope 325; wherein, the telescope 325 is also used to receive the echo signal.

[0077] In detail, the acousto-optic modulator 323 modulates the emitted laser into pulsed light and performs frequency shifting. The frequency-shifted pulsed light passes through amplifier 324 and is emitted into the atmosphere through telescope 325. The echo signal generated by the interaction with the atmosphere is received by telescope 325.

[0078] According to the above configuration, the combined use of beam splitter 322, acousto-optic modulator 323 and amplifier 324 enhances the intensity and anti-interference capability of the laser signal through modulation and amplification processes, thereby improving the reliability of the entire wind measurement system and the accuracy of the measurement results; by using telescope 325 to emit and receive lasers, the system can monitor environmental wind parameters in real time.

[0079] In one illustrative embodiment, such as Figure 3 As shown, the laser assembly 32 also includes a circulator 326, which is installed between the amplifier 324 and the telescope 325 and is suitable for separating the emitted laser and the echo signal.

[0080] In detail, the circulator 326 includes a first port, a second port, and a third port. The pulsed light output by the amplifier 324 is transmitted to the telescope 325 and emitted into the atmosphere through the transmission path between the first port and the second port. The echo signal generated by the interaction with the atmosphere is transmitted by the telescope 325 to the subsequent device through the receiving path between the second port and the third port.

[0081] According to the above configuration, the circulator 326 separates the transmitting and receiving paths, ensuring that the pulsed light output from the amplifier 324 can be transmitted to the telescope 325 without interference through the transmitting path between the first and second ports, and then emitted into the atmosphere. Simultaneously, the receiving path between the second and third ports of the circulator 326 ensures that the echo signal reflected from the atmosphere can be collected by the telescope 325 and transmitted to subsequent devices through the third port without affecting the amplifier 324 or the emitted laser. This design improves the system's stability and the accuracy of signal processing.

[0082] Figure 4 A schematic top view of a laser assembly according to an embodiment of the present disclosure is shown. Figure 5 A schematic diagram illustrating the test range of a wind-measuring radar according to an embodiment of the present disclosure is shown.

[0083] In one illustrative embodiment, such as Figure 4 and Figure 5 As shown, the laser assembly 32 includes two telescopes 325, which are configured to be symmetrically arranged at a preset angle along the direction of travel of the rail train 1, so that the lasers emitted by the two telescopes 325 intersect directly in front of the wind measuring radar 3, thereby increasing the wind measuring range.

[0084] Detailed, such as Figure 5 As shown, during the forward movement of the wind-measuring radar 3 along with the rail train, the two telescopes 325 can test the ambient wind within the laser coverage area in front to obtain ambient wind parameters including the ambient wind directly in front of and to the side of the rail train.

[0085] According to the above configuration, as the wind measuring radar 3 moves forward with the rail train 1, the two telescopes 325 can test the ambient wind within the laser coverage area in front, thereby obtaining ambient wind parameters including those directly in front of and to the side of the rail train, so as to provide temporary warnings for sudden crosswinds. This arrangement and testing method improves the wind measuring range and accuracy of the ambient wind parameters of the wind measuring radar 2, and provides important meteorological data support for the safe operation of the rail train 1.

[0086] It should be noted that the wind measurement range of wind radar 2 is determined by its own power configuration and internal layout, and can be adjusted according to needs. The laser emission power of wind radar 2 directly affects its wind measurement range; the higher the power, the farther the laser travels in the air, and the larger the wind measurement range. The wavelength of the laser also affects the wind measurement range; longer wavelengths (such as 1550nm) experience less attenuation in the air, thus allowing them to travel farther and increasing the wind measurement range accordingly. The field of view of telescope 325 also affects the wind measurement range; a larger field of view can cover a wider area, thereby increasing the wind measurement range. Setting up two telescopes 325 can effectively increase the field of view of wind radar 3, and a larger wind measurement range can effectively detect the ambient wind around the train, in order to cope with emergencies such as sudden crosswinds.

[0087] In one illustrative embodiment, such as Figure 4 As shown, the telescope 325 is mounted inside the housing 31 via the mounting base 3251.

[0088] In one illustrative embodiment, such as Figure 4 As shown, the wind measuring radar 3 also includes a light source integration 327, and the telescope 325 is connected to the light source integration 327 via optical fiber; wherein the laser 321, beam splitter 322, acousto-optic modulator 323, amplifier 324 and circulator 326 are installed inside the light source integration.

[0089] Based on the above configuration, the light source integration 327 achieves a compact and efficient design of the light source section of the wind measuring radar 3 by integrating various key optical components, such as laser 321, beam splitter 322, acousto-optic modulator 323, amplifier 324, and circulator 326. This integrated design reduces the number of system components, simplifies the system structure, and thus improves the reliability and stability of the system.

[0090] Figure 6 A schematic diagram illustrating the test range of a wind-measuring radar according to another embodiment of the present disclosure is shown.

[0091] In an alternative illustrative embodiment, such as Figure 6 As shown, the laser assembly 32 includes a telescope 325, which is configured to be rotatably mounted within the housing 31, suitable for adjusting the test range as needed.

[0092] According to the above configuration, the rotatable telescope 325 allows the laser assembly 32 to flexibly adjust the test range according to actual needs. The telescope 325 rotates within the housing 31 to adjust the laser emission direction; by rotating the telescope 325, the laser assembly 32 can change the laser emission angle, thereby adjusting the test range, enabling the laser assembly 32 to flexibly select a suitable test range according to different environments and application requirements.

[0093] In one illustrative embodiment, such as Figure 4 As shown, the wind measurement unit 2 also includes a processing component 4, which is located inside the track train 1. The processing component 4 is communicatively connected to the laser component 32 and is suitable for obtaining environmental wind parameters based on the local oscillator light and echo signals.

[0094] According to the above configuration, the processing component 4 is located inside the rail train 1, so that it is installed relatively stably on the rail train 1 and is not affected by the external environment.

[0095] In one illustrative embodiment, the processing component 4 is connected to the laser component 32 via a data cable and an optical fiber.

[0096] In one illustrative embodiment, such as Figure 3 As shown, the processing component 4 includes: a signal converter, an optical mixer 41, and a data processor 42; wherein, the signal converter is suitable for converting the beat frequency signal of the local oscillator light and the echo signal into an intermediate frequency electrical signal, and the intermediate frequency electrical signal is coupled and sampled by the optical mixer 41 and then analyzed by the data processor 42 to obtain the environmental wind parameters.

[0097] In detail, the signal converter converts the beat frequency signals of the local oscillator light and the echo signal into intermediate frequency electrical signals. This usually involves a photodetector converting the optical signal into an electrical signal. The converted intermediate frequency electrical signal is coupled and sampled by an optical mixer 41, which can effectively mix the two beams of light together and maintain the stability of the phase relationship during the mixing of the local oscillator light and the echo signal. The coupled and sampled intermediate frequency electrical signal is transmitted to a data processor 42 for further analysis to obtain environmental wind parameters, including key parameters such as wind speed and wind direction.

[0098] In one illustrative embodiment, due to the large amount of signal data, the data processor 42 includes a digital signal processing chip, a field-programmable gate array, or a graphics card, etc., to process the data at high speed.

[0099] In one illustrative embodiment, such as Figure 3 As shown, the acquired environmental wind parameters are displayed by display terminal 43.

[0100] In one illustrative embodiment, such as Figure 1 and Figure 2 As shown, the light-transmitting component 33 is configured to have a preset pitch angle with the horizontal plane to block at least part of the reflected light from the outside from entering the laser component 32.

[0101] In one illustrative embodiment, such as Figure 1 and Figure 2 As shown, the pitch angle of the light-transmitting component 33 relative to the horizontal plane is between 30° and 45°.

[0102] According to the above configuration, the light-transmitting component 33 has a preset pitch angle with the horizontal plane to block at least part of the external reflected light from entering the laser component 32. This can effectively reduce the impact of external reflected light on the laser component 32, thereby improving the performance and accuracy of the wind measuring radar system. Specifically, the pitch angle of the light-transmitting component 33 is between 30° and 45°. This angle range is chosen to ensure that external reflected light can be effectively blocked while maintaining sufficient light transmission so that the laser component 32 can work normally. Through this design, the light-transmitting component 33 can not only block external reflected light but also protect the laser component 32 from interference from the external environment, ensuring that the system can work stably and accurately. At the same time, the tilted light-transmitting component 33 can also ensure the aerodynamic performance of the wind measuring radar 3.

[0103] In one illustrative embodiment, such as Figure 1 and Figure 2 As shown, the light-transmitting component 33 includes: a light window 331; and a light window mounting part 332, which is suitable for fixing the light window 331 and mounting the light window 331 on the housing 31.

[0104] In one illustrative embodiment, such as Figure 2 As shown, the light window mounting part 332 includes a light window seat 3321, which is configured as an annular shape, and the light window 331 can be fitted into the annular light window seat 3321; and a light window cover 3322, which is configured as an annular shape and concentrically covers the light window seat 3321. The light window cover 3322 and the light window seat 3321 cooperate with each other to clamp and fix the light window 332.

[0105] According to the above configuration, the light-transmitting component 33 is designed to include a light window 331 and a light window mounting part 332. The light window 331 is the main part of the light-transmitting component 33, allowing laser or other light signals to pass through while blocking interference light from the external environment. The light window mounting part 332 is used to fix the light window 331 and mount the light window 331 onto the housing 31. Specifically, the light window mounting part 332 includes a light window seat 3321 and a light window cover 3322. The light window seat 3321 is constructed in an annular shape, and the light window 331 can be fitted into the annular light window seat 3321. The light window cover 3322 is also constructed in an annular shape, concentrically covering the light window seat 3321. The light window cover 3322 and the light window seat 3321 cooperate with each other to clamp and fix the light window 332. The structural design of the light window cover 3322 and the light window seat 3321 improves the performance and accuracy of the wind measuring radar 3.

[0106] In one illustrative embodiment, such as Figure 2 As shown, the light window mounting part 332 also includes a positioning pin 3323, which is suitable for positioning the light window 331, the light window seat 3321 and the light window cover 3322 in a circumferential manner; wherein, the positioned light window 331, the light window seat 3321 and the light window cover 3322 are connected by fastening bolts.

[0107] According to the above configuration, the positioning pin 3323 provides a fixed reference point during the installation of the light-transmitting component 33, so that the light window 331, the light window seat 3321 and the light window cover 3322 can be accurately aligned and will not be misaligned during the installation process.

[0108] In one illustrative embodiment, the placement angle and position of the optical window 331 are jointly designed and determined by the required testing range of the entire wind-measuring radar, such as the testing angle and testing distance, the arrangement position of the internal telescope 325, and the performance parameters of the optical window 331 itself (the thickness of the lens, light reflection characteristics, light refraction characteristics, light transmission characteristics, light focusing characteristics, etc.). Furthermore, the structural strength of the lens of the optical window 331 must also meet the requirements for resistance to impacts from foreign objects on the railway train.

[0109] In one illustrative embodiment, the inner edge of the light window holder 3321 is provided with a sealing structure and sealed with sealant.

[0110] In one illustrative embodiment, such as Figure 2 As shown, the wind measuring radar 3 also includes a base plate 34, which is installed at the bottom of the housing 31; and a sealing gasket 35, which is installed between the housing 31 and the base plate 34, and is suitable for sealing the housing 31 and the base plate 34.

[0111] According to the above configuration, the base plate 34 is installed at the bottom of the housing 31, providing a stable support foundation for the wind measuring radar 3; the sealing gasket 35 is installed between the housing 31 and the base plate 34 to seal the joint between the two; the sealing gasket 35 can prevent moisture, dust or other pollutants in the external environment from entering the interior of the housing 31, protect the internal components from damage, and ensure the normal operation of the wind measuring radar 3 in harsh environments.

[0112] In one illustrative embodiment, a pre-embedded heat pipe is provided on the base plate 34 to ensure the heat dissipation performance of the wind measuring radar 3 during long-term operation.

[0113] In one illustrative embodiment, such as Figure 2 As shown, the wind measuring radar 3 also includes a line outlet 36, located at the end of the housing 31 opposite to the light-transmitting component 33. The line outlet 36 includes an optical fiber line outlet and a power supply line outlet for the transmission of signals, power, data, etc., of the wind measuring radar 3. Each outlet can be adjusted according to the specific structure of the railcar 1 and the internal wiring space of the wind measuring unit 2, adapting to the specific structure of the railcar 1 without affecting the bending of the optical fiber.

[0114] In one illustrative embodiment, the components of the wind measuring radar 3 are connected by adhesive, screw fastening, and positioning pins. Sealing is achieved by using gaskets or adhesive to seal areas where sealing is required, so that the wind measuring radar 3 meets the mechanical performance requirements of static strength, modal characteristics, vibration resistance, and foreign object impact resistance for the external equipment of the railcar 1.

[0115] In one illustrative embodiment, such as Figure 1 As shown, the adapter plate 5 is suitable for mounting the wind measuring radar 3 onto the mounting platform 11 on the railcar 1.

[0116] In detail, by setting up the adapter plate 5 and utilizing the interface design of the adapter plate 5, it is backward compatible with the mounting platform 11 of the rail train 1 car body and upward meets the installation requirements of the wind measurement unit 2, so that the environmental wind speed measuring device is compatible with rail train 1 with different structures. The mounting platform 11 is an existing structure on the rail train 1 car body.

[0117] Figure 7 A schematic cross-sectional view of the installation structure of an environmental wind speed testing apparatus according to an embodiment of the present disclosure is shown. Figure 8 yes Figure 7 Enlarged view of point A in the middle; and Figure 9 yes Figure 7 Enlarged view of point B in the middle.

[0118] Detailed, such as Figure 7 and Figure 8 As shown, the outer casing 31 of the wind measuring radar 3 is mounted on the adapter plate 5 by fastening bolts; furthermore, as... Figure 7 and Figure 9 As shown, the adapter plate 5 is installed on the mounting interface 111 of the mounting platform 11 on the body of the rail train 1 by fastening bolts. The mounting interface 111 is an existing interface on the mounting platform 11 of the rail train 1.

[0119] The following is the specific installation process for the wind measuring radar 3: First, connect the adapter plate 5 to the railcar 1. The connection is made using the mounting interface 111 on the mounting platform 11 on the railcar 1. The mounting interface 111 includes screw seats, special nuts, rivet nuts, welding nuts, wire thread inserts, etc. The adapter plate 5 is connected to the railcar 1 by tightening bolts. Thread locking agent is applied to the connection to ensure connection strength. After the adapter plate 5 is connected to the railcar 1, install the wind measuring radar 3. First, lay the base plate sealing gasket. Then, through the openings on the base plate 34, use tightening bolts to connect to the threaded holes around the perimeter of the adapter plate 5. Thread locking agent is applied to the connection to ensure connection strength. After connection, apply sealant to the outside. The wind measuring radar 3 is sealed internally and externally for waterproofing and dustproofing through the internal sealing gasket 35 and the external sealant.

[0120] According to the above installation process, the wind measurement unit 2 can be quickly installed and replaced on different vehicle models, and the construction operation is convenient, fast and efficient.

[0121] The embodiments of this disclosure also provide a rail train, including a car body, on which the above-mentioned environmental wind speed testing device is installed to quickly, accurately and in real time obtain the magnitude and direction of the environmental wind around the rail train, and to determine the operating status of the rail train 1 in real time and guide the driver to adjust the speed of the rail train 1.

[0122] Figure 10 A flowchart illustrating a vehicle speed control method according to an embodiment of the present disclosure is shown schematically.

[0123] Embodiments of this disclosure also provide a vehicle speed control method, such as... Figure 10 As shown, this includes operations S1010~S1050.

[0124] In operation S1010, the ambient wind parameters and the real-time speed of the train are obtained.

[0125] According to embodiments of this disclosure, the environmental wind parameters include at least the wind direction and wind speed.

[0126] During operation of S1020, aerodynamic load data of the rail train is obtained from the first database based on environmental wind parameters and real-time vehicle speed.

[0127] According to embodiments of this disclosure, aerodynamic load data include aerodynamic drag, aerodynamic lift, aerodynamic lateral force, roll moment, pitch moment, and yaw moment, etc.

[0128] During operation S1030, dynamic data of the rail train is obtained from the second database based on aerodynamic load data and real-time vehicle speed.

[0129] According to embodiments of this disclosure, the dynamic data includes derailment coefficient, wheel load reduction rate, wheel load lateral force, stability index, vehicle attitude angle, etc.

[0130] When operating S1040, the running status of the railcar is determined based on the dynamic data, and prompts information is output in response to the running status.

[0131] When operating S1050, adjust the speed of the railcar according to the prompts.

[0132] The following detailed description is based on Embodiment 1 and Embodiment 2 of the present invention.

[0133] Example 1:

[0134] Operate S1011 to obtain the ambient wind speed of 20m / s within 3km ahead of Train No. 1, and the wind direction angle is 15° with the running direction of Train No. 1. At this time, Train No. 1 is running on the track at a speed of 350km / h.

[0135] Operation S1021 retrieves the aerodynamic load data of Train No. 1 from the first database according to the data combination of "real-time vehicle speed + wind speed + wind direction", including: aerodynamic drag coefficient CFx=-0.089, aerodynamic lift coefficient CFy=1.676, aerodynamic lateral force coefficient CFz=-1.622, roll moment coefficient CMx=0.838, pitch moment coefficient CMy=-0.420, and yaw moment coefficient CMz=2.431.

[0136] Operate S1031 to obtain the dynamic data of Train No. 1 from the second database according to the data combination of "real-time vehicle speed + aerodynamic load data", including: derailment coefficient 0.15, wheel load reduction rate 0.31, wheel load lateral force 17.4kN, stability index 1.73, car body attitude angle 0.27deg, etc.

[0137] Operation S1041: Based on the aforementioned dynamic data and in accordance with the relevant regulations on locomotive and rolling stock dynamic performance, it is determined that the operating status of Train No. 1 meets the requirements for normal operation, and the driver is prompted that there is no need to reduce speed.

[0138] Operate S1051, and the driver maintains the speed of train number one according to the prompts.

[0139] Example 2:

[0140] Operate S1012 to obtain the ambient wind speed of 20m / s within 3km ahead of Train No. 2, and the wind direction angle is 75° with the running direction of Train No. 2. At this time, Train No. 2 is running on the track at a speed of 350km / h.

[0141] Operate S1022 to obtain the aerodynamic load data of Train No. 2 from the first database according to the data combination of "real-time vehicle speed + wind speed + wind direction", including: aerodynamic drag coefficient CFx=0.702, aerodynamic lift coefficient CFy=5.865, aerodynamic lateral force coefficient CFz=-7.852, roll moment coefficient CMx=2.991, pitch moment coefficient CMy=-3.706, and yaw moment coefficient CMz=0.705.

[0142] Operate S1032 to obtain the dynamic data of Train No. 2 from the second database according to the data combination of "real-time vehicle speed + aerodynamic load data", including: derailment coefficient 0.33, wheel load reduction rate 0.88, wheel load lateral force 49.7kN, stability index 2.24, car body attitude angle 0.24deg, etc.

[0143] Operation S1042: Based on the above dynamic data and in accordance with the relevant regulations on locomotive and rolling stock dynamic performance, it is determined that the operating status of Train No. 2 does not meet the requirements for normal operation. If Train No. 2 continues to operate at 350km / h, the wheel load reduction rate will exceed the limit requirement of 0.8, and the lateral force of the wheel axle will approach the limit requirement of 58kN, posing a driving risk. The driver is advised to slow down.

[0144] Operate S1052. At this time, the driver reduces the speed of train number two according to the prompt information.

[0145] Those skilled in the art will understand that the features described in the various embodiments of this disclosure can be combined and / or combined in various ways, even if such combinations or combinations are not explicitly described in this disclosure. In particular, the features described in the various embodiments of this disclosure can be combined and / or combined in various ways without departing from the spirit and teachings of this disclosure. All such combinations and / or combinations fall within the scope of this disclosure.

[0146] The embodiments of this disclosure have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of this disclosure. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of this disclosure, and all such substitutions and modifications should fall within the scope of this disclosure.

Claims

1. An environmental wind speed testing device, suitable for mounting on a railcar, comprising: A wind measuring unit, installed on a railcar, is suitable for obtaining environmental wind parameters of the ambient wind passing through the railcar, the environmental wind parameters including at least the wind direction and wind speed of the ambient wind; The first database obtains the aerodynamic load data of the rail train based on the environmental wind parameters and the real-time speed of the rail train. The second database obtains the dynamic data of the rail train based on the aerodynamic load data and the real-time vehicle speed; as well as The early warning unit determines the operating status of the rail train based on the dynamic data and outputs a prompt message in response to the operating status. The wind measuring unit includes a wind measuring radar, which is installed on the top of the railcar and includes: The shell is constructed to be streamlined with smooth curved surfaces; A laser assembly, disposed within the housing, is adapted to emit laser light and receive echo signals. The laser assembly includes a laser, a beam splitter, an acousto-optic modulator, an amplifier, and two telescopes. The initial laser emitted by the laser is split into a local oscillator beam and an emitted laser by the beam splitter. The emitted laser is modulated by the acousto-optic modulator and the amplifier and then emitted through the telescope. The telescope is also used to receive the echo signal. The two telescopes are configured to be symmetrically arranged at a preset angle along the direction of travel of the railcar, so that the lasers emitted by the two telescopes intersect directly in front of the wind measuring radar, thereby increasing the wind measuring range.

2. The environmental wind speed testing device according to claim 1, characterized in that, The wind-measuring radar also includes: A light-transmitting component is mounted on the housing and positioned facing the emitting end of the laser component. It is suitable for accommodating the laser transmitted to the outside of the housing and for accommodating the echo signal returned to the receiving end of the laser component.

3. The environmental wind speed testing device according to claim 2, characterized in that, The laser assembly also includes a circulator installed between the amplifier and the telescope, suitable for separating the emitted laser and the echo signal.

4. The environmental wind speed testing device according to claim 3, characterized in that, The wind measurement unit also includes a processing component, which is located inside the railcar. The processing component is communicatively connected to the laser component and is suitable for obtaining the environmental wind parameters based on the local oscillator light and the echo signal.

5. The environmental wind speed testing device according to claim 4, characterized in that, The processing component includes: Signal converters, optical mixers, and data processors; The signal converter is adapted to convert the beat frequency signal of the local oscillator light and the echo signal into an intermediate frequency electrical signal. The intermediate frequency electrical signal is coupled and sampled by the optical mixer and then analyzed by the data processor to obtain the environmental wind parameters.

6. The environmental wind speed testing device according to claim 2, characterized in that, The light-transmitting component is configured to have a preset pitch angle with the horizontal plane to block at least part of the reflected light from the outside from entering the laser component.

7. The environmental wind speed testing device according to claim 6, characterized in that, The pitch angle between the light-transmitting component and the horizontal plane is between 30° and 45°.

8. The environmental wind speed testing device according to claim 7, characterized in that, The light-transmitting component includes: Light window; and The light window mounting part is suitable for fixing the light window and mounting the light window onto the housing.

9. The environmental wind speed testing device according to claim 2, characterized in that, The wind-measuring radar also includes a base plate, which is installed at the bottom of the housing; as well as A sealing gasket, installed between the housing and the base plate, is suitable for sealing the space between the housing and the base plate.

10. The environmental wind speed testing device according to claim 2 further includes an adapter plate, suitable for mounting the wind measuring radar on the mounting platform of the railcar.

11. A rail train, comprising a car body, wherein the car body is equipped with an environmental wind speed testing device as described in any one of claims 1 to 10.

12. A speed control method applied to the rail train of claim 11, comprising: Obtain the ambient wind parameters and the real-time speed of the train passing through the rail system; The aerodynamic load data of the rail train is obtained from the first database based on the environmental wind parameters and the real-time vehicle speed. The dynamic data of the rail train are obtained from the second database based on the aerodynamic load data and the real-time vehicle speed. The operating status of the rail train is determined based on the dynamic data, and prompt information is output in response to the operating status. as well as Adjust the speed of the railcar according to the prompt information.

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