Train-mounted crosswind test system

Abstract

The utility model provides a train-mounted crosswind test system, which comprises a plurality of pressure sensors symmetrically arranged on two side surfaces of a train, a data acquisition device and a data processing device, the data acquisition device and the data processing device are mounted in the train, the pressure sensors are attached to the two side surfaces of the train and are connected to the data acquisition device through signal lines, and the data processing device is connected with the data acquisition device. A signal wire is led out from the pressure sensor, then is routed along the surface of a train body, enters a compartment through a wire inlet hole in the surface of the train and is connected with a data acquisition device mounted in the train, and the data processing device is in communication connection with the data acquisition device. The attached pressure sensor is adopted to replace a wind speed and direction sensor or a laser radar in the prior art, the appearance of the train cannot be obviously changed, the influence of aerodynamic performance and increase of wind resistance are reduced, energy consumption can be reduced, and potential safety hazards can also be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of train crosswind testing, in particular to a train-mounted crosswind testing system. Background Art

[0002] At present, the test of environmental wind in rail transit is mainly carried out by establishing wind speed monitoring and alarm systems in dangerous sections where trains run, such as large bridges or viaducts, embankments, high embankments and wind outlet lines to ensure the driving safety of trains in corresponding environments. However, due to the sudden change and uncertainty of environmental wind speed, there are still certain limitations in obtaining the complete wind environment along the line with limited ground measurement points. The location of existing wind speed monitoring points is also different from the actual location of the crosswind aerodynamic load that affects railway trains.

[0003] The current on-board environmental wind test mainly adopts the method of installing an integrated wind measuring device on the roof, including wind speed and direction sensors, laser radar solutions, etc. However, the wind speed and direction sensors and laser radars in these methods need to protrude from the top of the train, which significantly changes the appearance of the train, affects the aerodynamic performance of the train, and poses certain safety hazards. Utility Model Content

[0004] In view of this, the present invention provides a train-mounted crosswind testing system to solve at least one of the above-mentioned problems.

[0005] In order to achieve the above purpose, the utility model adopts the following scheme:

[0006] The present application provides a train-mounted crosswind testing system, comprising: a plurality of pressure sensors symmetrically arranged on the surfaces of both sides of the train, a data acquisition device and a data processing device installed inside the train, wherein the pressure sensors are fitted on the surfaces of both sides of the train, and the pressure sensors are connected to the data acquisition device via signal lines, the signal lines are led out from the pressure sensors and then extended to the surface of the train body, enter the carriage through the line entry holes on the surface of the train, and are connected to the data acquisition device installed inside the train, and the data processing device is in communication connection with the data acquisition device.

[0007] As an embodiment of the present utility model, the pressure sensor is a thin-sheet piezoresistive pressure sensor, and the diameter of the thin-sheet piezoresistive pressure sensor is less than 5 mm.

[0008] As an embodiment of the utility model, there is a layer of double-sided tape between the above-mentioned pressure sensor and the surface of the train, the double-sided tape has a central opening, and the opening corresponds to the pressure-sensitive hole of the pressure sensor. The outer contour shape of the double-sided tape is the same as that of the pressure sensor and just covers the pressure sensor.

[0009] As an embodiment of the present invention, the signal line is fixed to the surface of the train body by means of adhesive tape.

[0010] As an embodiment of the present invention, the diameter of the wire entry hole matches the diameter of the signal line, and the wire entry hole is provided with a flexible sealing ring to ensure the sealing of the wire entry hole.

[0011] As an embodiment of the present utility model, the data acquisition device is integrated with a signal amplifier, and the pressure signal collected by the pressure sensor is transmitted to the data acquisition device after passing through the signal amplifier.

[0012] As an embodiment of the present invention, the signal amplifier has multiple amplifier channels built in, and each amplifier channel corresponds to a signal input of a pressure sensor.

[0013] As an embodiment of the present invention, the outer side of the signal line is covered with a protective layer.

[0014] As an embodiment of the present utility model, the above system further includes: a storage device, a printing device, a display device and an output device, which are respectively connected to the data processing device.

[0015] As an embodiment of the utility model, the above-mentioned system also includes: an audible and visual alarm integrated in the cab, the audible and visual alarm is connected to the data processing device, and when the data processing device detects that the crosswind speed exceeds a preset threshold, the audible and visual alarm is triggered to issue a clear warning.

[0016] It can be seen from the above technical scheme that the train-mounted crosswind test system provided by the present application uses a fitted pressure sensor to replace the wind speed and direction sensor or lidar in the prior art. It will not significantly change the shape of the train, reduces the impact on aerodynamic performance and the increase in wind resistance, and can not only reduce energy consumption but also reduce safety hazards. The method of obtaining wind speed by wind pressure detection is already a very mature technology in the prior art. Therefore, while being able to achieve the above-mentioned beneficial effects, the present application can also fully meet the needs of on-board crosswind testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0018] Figure 1 It is a structural schematic diagram of a train-mounted crosswind testing system provided in an embodiment of the present application;

[0019] Figure 2 This is a schematic diagram of the test arrangement of a typical pressure sensor;

[0020] Figure 3 It is a structural schematic diagram of a train-mounted crosswind testing system provided in another embodiment of the present application. DETAILED DESCRIPTION

[0021] It should be noted that the term "comprises" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method / process, system, product or equipment that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods / processes, products or equipment.

[0022] In the present invention, the terms "upper", "lower", "inner", "outer", "middle", "top" and "bottom" indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have specific positions, or to be constructed and operated in specific positions.

[0023] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in this utility model can be understood according to specific circumstances.

[0024] In addition, the terms "disposed" and "connected" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0025] like Figure 1 Shown is a structural schematic diagram of a train-mounted crosswind testing system provided in an embodiment of the present application, which includes a plurality of pressure sensors 100, a data acquisition device 200 and a data processing device 300, wherein the plurality of pressure sensors 100 are connected to the data acquisition device 200, and the data acquisition device 200 is connected to the data processing device 300.

[0026] The multiple pressure sensors 100 are symmetrically arranged on the surfaces of both sides of the train. To reduce the impact of the sensor shape on the train flow field, the pressure sensor 100 can be a thin-film piezoresistive pressure sensor with a diameter less than 5 mm, such as Honeywell's FSG series thin-film piezoresistive pressure sensor. This series of sensors has a diameter of less than 5 mm and is suitable for installation in compact spaces. It has high sensitivity and accurate pressure measurement capabilities. The specific arrangement positions of the multiple pressure sensors 100 can be selected according to the aerodynamic shape of the test train, such as Figure 2 This is a typical test layout diagram of a pressure sensor (the circular icon in the figure represents the installation position of the pressure sensor). The actual number of measuring points can be changed according to user needs.

[0027] Preferably, in order to ensure that the pressure sensor 100 is tightly attached to the surface of the train and will not be displaced due to vibration and wind during operation, to ensure the accuracy and stability of the measured data, and to provide a certain buffer to protect the pressure sensor from external impact damage and extend the service life of the sensor, the present application uses double-sided tape to attach the pressure sensor 100 to the surface of the train. A hole is opened in the center of the double-sided tape, and the hole is exactly aligned with the position of the pressure-sensing hole of the pressure sensor 100. This opening ensures that the effective working area of ​​the sensor is not blocked, ensuring the accurate collection of pressure data. The outer contour shape of the double-sided tape is exactly the same as that of the pressure sensor, ensuring that the double-sided tape can tightly cover the entire pressure sensor, while preventing the edges from warping or getting dusty, thereby achieving better fixing and protection effects.

[0028] The installation process of the pressure sensor 100 is as follows: first clean the surface of the train to ensure that there is no dust and grease to ensure that the double-sided tape can be fully bonded; then stick one side of the double-sided tape to the back of the pressure sensor, ensuring that the center opening is aligned with the pressure-sensitive hole; stick the sensor with the double-sided tape to the surface of the train, press to ensure a close fit and prevent the formation of bubbles.

[0029] Through the above design, the pressure sensor of the train-mounted crosswind test system fits more firmly and reliably to the train surface, which not only improves the ease and firmness of sensor installation, but also ensures that the sensor provides accurate and reliable wind pressure data under complex operating conditions, providing strong guarantee for the safe operation of the train.

[0030] The pressure sensor 100 is connected to a data acquisition device 200 installed inside the train through a signal line. The signal line is arranged along the surface of the train, enters the interior of the carriage through a line inlet hole on the surface of the train, and is connected to the data acquisition device 200.

[0031] Preferably, the signal line can be fixed by tape when it is arranged along the surface of the train body. This fixing method is simple and effective, and does not require additional modification or punching of the body, which is convenient for later maintenance and replacement. Industrial tape with high adhesion and tensile strength can be selected, which can firmly fix the signal line under high-speed operation, vibration and external wind force. The tape needs to have good weather resistance and can be used for a long time without failure under various harsh environmental conditions (such as high temperature, low temperature, and humidity). The tape should also have good flexibility and be able to adapt to the slight deformation of the train surface without affecting the fixation and protection of the signal line. According to the layout of the pressure sensor 100, the signal line is arranged along the surface of the train to ensure that the signal line path is the shortest and does not hinder the normal operation of other components. When fixing the signal line section by section with tape, it is necessary to ensure that the tape covers the signal line and the surface of the train, and strengthen the fixation at a certain distance or at the turning point and key point to ensure that it is not loose. After the fixation is completed, check the firmness of each section of the signal line and the tape, and adjust it if necessary to ensure that the signal line is close to the body, not hanging or loose.

[0032] This embodiment requires opening a wire entry hole at an appropriate position on the surface of the train body. The aperture of the signal wire entry hole is precisely designed according to the diameter of the signal wire to ensure that the signal wire can pass through the hole smoothly without too much gap, thereby ensuring the fixing effect. The flexible sealing ring is wrapped around the signal wire and fits tightly against the inner wall of the wire entry hole, which can effectively prevent outside air, moisture or dust from entering the interior of the carriage through the hole, ensuring the cleanliness of the environment in the carriage and the safe operation of the equipment. The flexible sealing ring has a certain deformation ability and elasticity, and can play a shock-absorbing role during the operation of the train, protecting the signal wire from wear and fatigue damage.

[0033] Preferably, a protective layer can also be wrapped around the outside of the signal line. The protective layer on the outside of the signal line generally adopts wear-resistant, corrosion-resistant, high and low temperature resistant and UV-resistant materials, such as polyvinyl chloride (PVC), polyethylene (PE) or thermoplastic polyurethane (TPU). The protective layer can be a single-layer or multi-layer structure, and a shielding layer, a reinforcing layer, etc. can be added according to specific requirements to improve the comprehensive performance of the signal line. The protective layer material can be evenly coated on the outside of the signal line through an extrusion process to form a protective layer. If multi-layer protection is required, multiple extrusion or composite processes can be used to form a multi-layer protective structure outside the signal line. Reinforced fibers or metal shielding layers can be added to the protective layer to improve the tensile and compressive properties of the signal line. In addition, a shielding layer can be added to the protective layer to reduce the impact of external electromagnetic interference on the signal line and improve the stability and reliability of signal transmission. The signal line protective layer can effectively avoid damage to the information line and signal attenuation caused by vibration, friction and environmental factors in the harsh environment of high-speed train operation.

[0034] In this way, the signal line of the train-mounted crosswind test system can be firmly fixed on the surface of the vehicle body, ensuring the stability and reliability of signal transmission. At the same time, it can ensure effective sealing of the signal line entry hole, prevent adverse external environmental factors from affecting internal equipment and data acquisition, and improve the reliability and durability of system operation.

[0035] In the present application, since the pressure sensor is a piezoresistive pressure sensor and the sensor signal is a voltage signal, the analog voltage signal needs to be converted into a digital signal that can be recorded by the computer, and the shape of the amplifier will affect the flow field of the vehicle body, thereby affecting the test results. Therefore, the amplifier is built into the data acquisition device 200 in the present application. The pressure signal collected by the pressure sensor 100 is transmitted to the data acquisition device 200 after passing through the signal amplifier. In addition to the analog-to-digital conversion function, the amplifier here also has a signal amplification function. In this embodiment, a signal amplifier with high gain and low noise can be selected to adapt to the output range of the sensor signal to ensure that the original signal still maintains a high signal-to-noise ratio after amplification. Ensure that the amplifier has good linearity in the entire measurement range of the pressure signal to avoid signal distortion. The amplifier circuit design should have good anti-interference ability, especially when used in a complex electromagnetic environment of the train, to ensure the stability and accuracy of the signal.

[0036] Preferably, each amplifier channel can correspond to the input of a pressure sensor signal, and the pressure signals from different sensors can be amplified and converted into analog-to-digital signals respectively. Since each channel is ensured to perform signal amplification processing independently, interference between different sensor signals is avoided, and the overall accuracy and reliability of the system are improved.

[0037] The data acquisition device 200 integrates a signal amplifier, which can amplify the pressure signal collected by the pressure sensor 100 and transmit it to the data processing device 300 .

[0038] The data processing device 300 analyzes and processes the data, and can display, store and output the data through a display device, a storage device, a printing device and an output device. In addition, the system also includes an audible and visual alarm integrated in the train cab. When the data processing device 300 detects that the crosswind speed exceeds a preset threshold, the audible and visual alarm will sound a warning to remind the driver to take necessary safety measures.

[0039] Specifically, the pressure sensor 100 adopts a thin sheet piezoresistive pressure sensor with a diameter of less than 5 mm, which is fixed to the surface of both sides of the train by double-sided tape to ensure a tight fit. The central opening of the double-sided tape corresponds to the pressure sensing hole of the pressure sensor, and the outer contour shape is consistent with the sensor, covering the sensor to maintain its stability.

[0040] The signal line is firmly fixed to the train surface with adhesive tape and equipped with a flexible sealing ring to match the cable entry hole to ensure the sealing of the cable entry hole. The outside of the signal line is also covered with a protective layer to improve anti-interference ability and durability.

[0041] In the data acquisition device 200, each amplifier channel corresponds to a pressure sensor, and each collected pressure signal is amplified and transmitted to the data processing device 300 for further processing and analysis. The data processing device 300 is not only responsible for real-time data processing, but also can be connected with a storage device, a display device, a printing device and an output device to form a complete monitoring and analysis system.

[0042] The data processing device 300 is also installed inside the train. It calculates the pressure data collected by the data acquisition device 200 to obtain the corresponding crosswind speed data. This calculation process belongs to the prior art and will not be described in detail in this application.

[0043] Preferably, Figure 3 As shown, the train-mounted crosswind testing system of this embodiment also includes a storage device 400, a printing device 500, a display device 600 and an output device 700, which are respectively connected to the data processing device 300.

[0044] The storage device 400 is responsible for storing the crosswind pressure data processed by the data processing device, supports large-capacity data storage, ensures long-term data recording, provides data backup and recovery functions, and prevents data loss.

[0045] The printing device 500 prints the processed crosswind test data into a paper report in real time or on demand, and supports custom data formats and printing templates to meet different needs.

[0046] The display device 600 can display the crosswind pressure data and related analysis results in real time. An LCD display, LED screen, etc. can be used. The appropriate display technology is selected according to application requirements. It provides a graphical display interface to make the data intuitive and easy to read.

[0047] The data output interface of the output device 700 can be USB, Ethernet or wireless transmission mode, which is convenient for data export and further analysis and processing, and supports data communication with external systems, such as networked monitoring systems or remote data analysis platforms.

[0048] Preferably, the train-mounted crosswind testing system of this embodiment also includes: an audible and visual alarm integrated in the cab, which is connected to the data processing device 300. When the data processing device 300 detects that the crosswind speed exceeds a preset threshold, the audible and visual alarm is triggered to issue a clear warning.

[0049] It can be seen from the above technical scheme that the train-mounted crosswind test system provided by the present application uses a fitted pressure sensor to replace the wind speed and direction sensor or lidar in the prior art. It will not significantly change the shape of the train, reduces the impact on aerodynamic performance and the increase in wind resistance, and can not only reduce energy consumption but also reduce safety hazards. The method of obtaining wind speed by wind pressure detection is already a very mature technology in the prior art. Therefore, while being able to achieve the above-mentioned beneficial effects, the present application can also fully meet the needs of on-board crosswind testing.

[0050] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only a specific embodiment of the utility model and is not intended to limit the scope of protection of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A train-mounted crosswind test system, characterized in that: include: A plurality of pressure sensors are symmetrically arranged on the surfaces of both sides of the train, and a data acquisition device and a data processing device are installed inside the train. The pressure sensors are fitted on the surfaces of both sides of the train, and the pressure sensors are connected to the data acquisition device via signal lines. The signal lines are led out from the pressure sensors and then extended to the surface of the train body, enter the carriage through the line entry holes on the surface of the train, and are connected to the data acquisition device installed inside the train. The data processing device is in communication connection with the data acquisition device.

2. The train-mounted crosswind testing system according to claim 1, characterized in that: The pressure sensor is a thin-sheet piezoresistive pressure sensor, and the diameter of the thin-sheet piezoresistive pressure sensor is less than 5 mm.

3. The train-mounted crosswind testing system according to claim 2, characterized in that: There is a layer of double-sided tape between the pressure sensor and the surface of the train. The double-sided tape has a central opening, which corresponds to the pressure-sensitive hole of the pressure sensor. The outer contour shape of the double-sided tape is the same as that of the pressure sensor and just covers the pressure sensor.

4. The train-mounted crosswind testing system according to claim 1, characterized in that: The signal line is fixed to the surface of the train body by means of adhesive tape.

5. The train-mounted crosswind testing system according to claim 1, characterized in that: The hole diameter of the wire entry hole matches the diameter of the signal line, and the wire entry hole is equipped with a flexible sealing ring to ensure the sealing of the wire entry hole.

6. The train-mounted crosswind testing system according to claim 5, characterized in that: The data acquisition device is integrated with a signal amplifier, and the pressure signal collected by the pressure sensor is transmitted to the data acquisition device after passing through the signal amplifier.

7. The train-mounted crosswind testing system according to claim 6, characterized in that: The signal amplifier has multiple amplifier channels built in, and each amplifier channel corresponds to a signal input of a pressure sensor.

8. The train-mounted crosswind testing system according to claim 1, characterized in that: The outer side of the signal line is covered with a protection layer.

9. The train-mounted crosswind testing system according to claim 1, characterized in that: Also includes: A storage device, a printing device, a display device and an output device are respectively connected to the data processing device.

10. The train-mounted crosswind testing system according to claim 1, characterized in that: Also includes: An audible and visual alarm is integrated in the cab, and the audible and visual alarm is connected to the data processing device. When the data processing device detects that the crosswind speed exceeds a preset threshold, the audible and visual alarm is triggered to issue a clear warning.

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