A stability measurement system and method for high-speed EMU

Abstract

The present invention discloses a stability measurement system and a measurement method for a high-speed motor vehicle group, which relates to the technical field of motor vehicle stability testing, and includes a handheld terminal, a collection terminal, and an installation component. The handheld terminal is installed with a test software for real-time display of the collected installation stability data and the running stability data of the motor vehicle. The collection terminal is connected to the handheld terminal signal for collecting the installation stability and the running stability data of the motor vehicle. The collection terminal includes a housing and a group of antennas connected to the housing. The collection terminal also includes a power module, a main control module, a storage module, a collection module, and a communication module. The collection module includes a position collection module, an acceleration collection module, and an angular velocity collection module. The installation component is used to install the collection terminal on the motor vehicle. The present invention realizes the collection of stability data of several motor vehicles, and at the same time, the collection terminal is conveniently installed, and the vibration condition of the collection terminal is judged to ensure the accuracy of the stability data.

Description

Technical Field

[0001] The invention relates to the technical field of motor vehicle stability testing, and in particular to a stability measurement system and a measurement method for a high-speed motor vehicle group. Background Art

[0002] As the service life of my country's high-speed EMU trains continues to increase, the rail line conditions and the overall performance of the EMUs have inevitably undergone complex changes. Among them, the vibration of the vehicle system is the focus of attention of all operation and maintenance units. It is closely related to the train's serpentine motion stability, operation safety and running smoothness.

[0003] According to the existing usage requirements, it is necessary to equip the EMU with necessary portable stability testing instruments according to the EMU allocation situation, so that the EMU with on-board stability warning failure can be retested using the stability testing instrument, and the stability of the EMU should be covered at least once in the specified time period.

[0004] In current use, on the one hand, since the detection equipment must be placed in the corresponding EMU for each measurement, there is no guarantee that passengers will not interfere with the placed detection equipment; on the other hand, since the regular period detection cannot fully monitor the dynamic state of the EMU during operation, it is impossible to maintain accurate detection of stability data for a long time.

[0005] Therefore, there is an urgent need to develop a stability measurement system and a measurement method for high-speed EMUs. Summary of the invention

[0006] The object of the present invention is to provide a stability measurement system and a measurement method for a high-speed train set to solve the problems raised in the above-mentioned background technology.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a stability measurement system for high-speed EMUs, comprising a handheld terminal, a collection terminal, and an installation component, wherein the handheld terminal is installed with a test software for real-time display of the collected installation stability data and the running stability data of the EMU;

[0008] The acquisition terminal is connected to the handheld terminal by signal, and is used to collect installation stability and running stability data of the motor vehicle; the acquisition terminal includes a shell and a group of antennas connected to the shell; the acquisition terminal also includes a power module, a main control module, a storage module, an acquisition module, and a communication module, and the acquisition module includes a position acquisition module, an acceleration acquisition module, and an angular velocity acquisition module; the main control module is used to compare the stability index qualified value set for each motor vehicle carriage with the actual stability index value, establish a comparison list and a qualified proportion coefficient, and display them on the handheld terminal and / or the terminal platform, indicating the vibration conditions of each motor vehicle carriage, and is used to judge the shaking condition of the shell and make corresponding adjustments;

[0009] The mounting assembly is used to mount the acquisition terminal on a motor vehicle. The mounting assembly includes a first connecting plate, a second connecting plate, a fixing portion, and a first supporting portion. The first connecting plate is fixed to the vehicle wall in the motor vehicle compartment. The second connecting plate is fixedly connected to the outer surface of the first connecting plate. The fixing portions are respectively located at both sides of the bottom of the housing and are fixedly connected to the housing. The first supporting portions are respectively located directly below the corresponding fixing portions and are fixedly connected to the second connecting plate. The first supporting portion is detachably fixedly connected to the corresponding fixing portion.

[0010] Each of the first supporting parts is provided with a displacement detecting part for detecting the movement of the fixed part, the moving end of the displacement detecting part is rotatably connected with the first limiting part, and the first limiting part is connected to the fixed part through the second fastening part; a pressure sensor for detecting the shaking of the shell is installed in the middle of the upper surface of the second connecting plate, and a data processor is fixedly connected to the bottom of the second connecting plate, the displacement detecting part and the pressure sensor are signal-connected to the input end of the data processor, and the output end of the data processor is connected to the acquisition terminal.

[0011] According to the above technical solution, a group of through holes are opened on both sides of the bottom of the shell, and a group of the through holes is connected to the fixing part through bolts.

[0012] According to the above technical solution, the fixed portion is a convex-shaped structure, and first sliding grooves matching the shapes of the two sides of the fixed portion are provided on both sides of the first supporting portion, so that the first supporting portion and the fixed portion can be slidably connected; a protrusion is integrally provided in the middle of the first supporting portion and between the two first sliding grooves, and the upper surface height of the protrusion is higher than the lower surface height of the first sliding groove, so that the protrusion and the first sliding groove can limit the fixed portion to a certain extent.

[0013] According to the above technical solution, first connecting holes with corresponding positions and matching sizes are opened on the same side of the fixing part and the first supporting part, and the first fastening part is connected to the inside of the first connecting hole, so that the fixing part is stably installed in the first sliding groove.

[0014] According to the above technical solution, second connection holes are provided on the top of the first limiting portion and the front end surface of the fixing portion, and the insides of the two second connection holes are connected to the second fastening portion.

[0015] According to the above technical solution, a second sliding groove is opened on the upper part of the outer surface of the shell toward the first connecting plate, a slider is slidably connected inside the second sliding groove, a third limiting portion is fixedly connected to the surface of the slider, and sleeves are fixedly connected at both ends of the third limiting portion and at positions corresponding to a group of antennas respectively, and each sleeve is sleeved on the corresponding antenna so that a group of antennas are always in a vertical state.

[0016] According to the above technical solution, the first connecting plate is located on the surface of one side of the slider and is fixedly connected with an ear seat corresponding to the bottom position of the second slide groove. A fixed shaft is fixedly connected inside the ear seat. One end of the fixed shaft is rotatably connected with a second limiting portion. When the second limiting portion is rotated to the top of the slider, it is pressed on the upper surface of the slider.

[0017] According to the above technical solution, the position acquisition module, acceleration acquisition module, and angular velocity acquisition module are used to obtain the train GPS positioning data, three-dimensional acceleration data, and three-dimensional angular velocity data respectively;

[0018] The position acquisition module signal is connected to a GPS module, the acceleration acquisition module signal is connected to an acceleration sensor, the angular velocity acquisition module signal is connected to a gyroscope, and the GPS module, the acceleration sensor, and the gyroscope are all arranged inside the shell.

[0019] According to the above technical solution, a warning coefficient value is pre-set in the main control module. When the qualified proportion coefficient is less than or equal to the warning coefficient value, the main control module transmits a warning signal to the handheld terminal and / or terminal platform through the communication module, so that the inspection personnel can directly reach the carriage for further verification and testing.

[0020] The present invention also provides a method for measuring the stability of a high-speed train set, the method being as follows:

[0021] S1: pre-laying the installation components and installing the acquisition terminal;

[0022] S2: Determine the stability of the installation of the acquisition terminal body;

[0023] S3: When the acquisition terminal is installed stably, the acquisition terminal collects position data, three-dimensional acceleration data and three-dimensional angular velocity data in the train compartment;

[0024] S4: The collection terminal in each motor vehicle carriage performs stability judgment in each set time period, and establishes a corresponding comparison list and qualified ratio coefficient to perform stability analysis;

[0025] S5: Verify the corresponding acquisition terminal according to the stability analysis results, identify problems and perform corresponding maintenance to improve the stability of the train during travel and the comfort of passengers.

[0026] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0027] 1. The present invention can effectively select the location and conveniently install the acquisition terminal by setting the installation component. At the same time, a displacement detection unit and a pressure sensor are set to judge the vibration condition of the acquisition terminal, thereby ensuring the accuracy of the stability data.

[0028] 2. The present invention establishes qualified values ​​of the lateral and vertical stability index and qualified values ​​of the lateral, longitudinal and vertical angular velocities, which can be compared with the corresponding actual values. In addition to displaying a graph of the corresponding data on the handheld terminal and / or terminal platform, a comparison list is also established and displayed, which can quickly and intuitively obtain the qualified status of the data, and establish a qualified ratio coefficient to indicate the vibration status of the corresponding EMU carriage, so as to timely conduct corresponding problem troubleshooting and improve maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the specific embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the specific embodiments. Obviously, the drawings described below are some specific embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0030] Figure 1 is a schematic diagram of the installation position provided by an embodiment of the present invention;

[0031] Figure 2 It is a schematic diagram of the overall structure provided by an embodiment of the present invention;

[0032] Figure 3 yes Figure 1 A schematic diagram of the enlarged structure of the middle A area;

[0033] Figure 4 yes Figure 2 Schematic diagram of the enlarged structure of the middle B area;

[0034] Figure 5 is a schematic diagram of the installation position of the pressure sensor provided by an embodiment of the present invention;

[0035] Figure 6is a schematic diagram of a state where the sleeve and the antenna are not connected according to an embodiment of the present invention;

[0036] Figure 7 It is a schematic diagram of system modules provided by an embodiment of the present invention.

[0037] In the figure: 1. shell; 2. antenna; 3. first connecting plate; 4. second connecting plate; 5. fixing part; 6. first supporting part; 7. first fastening part; 8. first slide groove; 9. protrusion; 10. displacement detecting part; 11. first limiting part; 12. second fastening part; 13. ear seat; 14. fixed shaft; 15. second limiting part; 16. slider; 17. third limiting part; 18. sleeve; 19. second slide groove; 20. second supporting part; 21. pressure sensor; 22. data processor. DETAILED DESCRIPTION

[0038] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Example 1

[0042] See also Figure 1-Figure 7An embodiment of the present invention provides a stability measurement system for a high-speed EMU, comprising a handheld terminal and a collection terminal connected to the handheld terminal by signal; the collection terminal is used to collect the installation stability of the collection terminal and the three-dimensional acceleration information, three-dimensional angular velocity information, and GPS positioning information of the EMU in real time after the installation is completed; the handheld terminal is installed with test software, which can display the collected information in real time, and the test software can calculate the EMU stability in real time based on the collected information and display it in real time.

[0043] Specifically, refer to Figure 1-Figure 4 The acquisition terminal includes a housing 1, a group of antennas 2 are connected to the rear side of the housing 1, and the antennas 2 are used to receive and transmit wireless signals. A group of antennas 2 is usually provided with two; the acquisition terminal is connected to a mounting assembly, and the mounting assembly is used to install the acquisition terminal on the motor vehicle. Preferably, reference Figure 1 The acquisition terminal is installed on the wall of the train compartment on one side of the display screen through the installation component. The display screen is usually used to display information such as train speed, carriage number, and upcoming station. The specific details are not given here. The surface of the wall is set to be flat. The acquisition terminal placed at this position can be kept in this position for a long time without adjustment for testing. At the same time, passengers getting on and off the train and walking around will not affect the use of the acquisition terminal.

[0044] The mounting assembly includes a first connecting plate 3 fixedly connected to the vehicle wall, and the fixing connection method can be threaded fixing or customized double-sided adhesive fixing. A second connecting plate 4 is fixedly connected to the outer surface of the first connecting plate 3, and a truss is fixed between the second connecting plate 4 and the first connecting plate 3 and below the second connecting plate 4. The truss is used to improve the supporting stability of the second connecting plate 4.

[0045] refer to Figure 3, a group of through holes are provided on both sides of the bottom of the housing 1, and a fixing part 5 is connected to the group of through holes by bolts; the fixing part 5 is a convex-shaped structure, and a first support part 6 is fixedly connected to the surface of the second connecting plate 4 located directly below the fixing part 5, and the first support part 6 is slidably connected to the fixing part 5. Among them, first slide grooves 8 matching the shapes of the two sides of the fixing part 5 are provided on both sides of the first supporting part 6, and a convex block 9 is integrally provided in the middle of the first supporting part 6 and located between the two first slide grooves 8. The upper surface height of the convex block 9 is higher than the lower surface height of the first slide groove 8. Therefore, the convex block 9 and the first slide groove 8 can limit the fixing part 5 to a certain extent, reducing the shaking of the fixing part 5 inside the first supporting part 6. In addition, first connecting holes with corresponding positions and matching sizes are provided on the same side of the fixing portion 5 and the first supporting portion 6, and the first connecting hole is connected to the inside of the first fastening portion 7. The first fastening portion 7 is used to firmly install the fixing portion 5 in the first slide groove 8 through the connection of the first fastening portion 7 when the fixing portion 5 slides and is installed in the first supporting portion 6, so as to reduce the possibility of displacement and sliding due to the speed change when the motor vehicle is running.

[0046] When installing the housing 1, the fixing part 5 is pre-fixed and installed with the housing 1 through the through hole, and then the fixing part 5 is installed on the first supporting part 6 together with the housing 1. It should be noted that the first slide groove 8 is provided with a baffle at the rear end of the first supporting part 6, and the baffle is in contact with the rear end of the fixing part 5. During installation, after the fixing part 5 slides to contact with the baffle, the fixing part 5 is connected and fixed with the first supporting part 6 through the first fastening part 7, and the installation of the housing 1 on the mounting assembly is completed.

[0047] refer to Figure 3 A displacement detection part 10 is provided on the first support part 6, and a first limiting part 11 is connected to the movable end bearing of the displacement detection part 10. The first limiting part 11 can be set as a block structure, and a second connecting hole is provided on the top of the first limiting part 11 and the front end surface of the fixing part 5; Figure 3 The first limiting portion 11 is positioned in the middle, the second connection hole at the top of the first limiting portion 11 is aligned with the second connection hole on the front end surface of the fixing portion 5, and the interiors of the two second connection holes are connected with the second fastening portion 12. The first fastening portion 7 and the second fastening portion 12 can be configured as, but not limited to, a fixing pin or a threaded fastener.

[0048] After the housing 1 is installed and fixed, the position of a group of antennas 2 is adjusted to maintain the best signal receiving angle. In this solution, a group of antennas 2 is kept in a vertical state to achieve the best signal receiving angle.

[0049] refer to Figure 2The first connecting plate 3 is provided with a second slide groove 19 on the upper part of the outer surface of the housing 1. The slider 16 is slidably connected inside the second slide groove 19. The surface of the slider 16 is fixedly connected with a third limiter 17. The third limiter 17 is set in a long rod shape. The two ends of the third limiter 17 and the positions corresponding to a group of antennas 2 are fixedly connected with sleeves 18. The sleeves 18 are sleeved on the antennas 2, so that the group of antennas 2 are always in a vertical state. Figure 6 As shown, it is a state diagram where the sleeve 18 is located at the upper end of a group of antennas 2.

[0050] Installation method 1: first adjust the angle of a set of antennas 2, then hold the third limiter 17 to slide the sleeve 18 along the outer surface of the antenna 2 to the bottom of the second slide groove 19, as shown in FIG. Figure 2 The position shown realizes the angle limitation of the sleeve 18 on a group of antennas 2 to prevent the antennas 2 from being deflected and causing poor signal reception during the operation of the train.

[0051] Installation method two, hold the third limiting part 17 to make the sleeve 18 located at the upper end of the antenna 2, adjust the angle of the antenna 2 according to the position of the sleeve 18, then slide the sleeve 18 down and fine-tune the angle of the antenna 2 to ensure the best signal receiving angle of the antenna 2. With the help of the setting of the sleeve 18, not only the limiting is achieved during the travel of the motor vehicle, but also the angle installation of the antenna 2 can be assisted before installation.

[0052] refer to Figure 4 , in order to achieve the stability of the slider 16 in the vertical direction during the running of the motor vehicle, that is, when the slider 16 is subjected to an upward thrust in the direction of the second slide slot 19 during the bumping of the motor vehicle, the position of the slider 16 is fixed. The first connecting plate 3 is located on the surface of one side of the slider 16 and is fixedly connected to an ear seat 13 corresponding to the bottom position of the second slide slot 19. The interior of the ear seat 13 is fixedly connected to a fixed shaft 14. One end of the fixed shaft 14 is rotatably connected to a second limiting portion 15. When the second limiting portion 15 is rotated to the top of the slider 16, it just presses on the upper surface of the slider 16. The second limiting portion 15 can be set as a block structure. After the above-mentioned sleeve 18 limits the position of the antenna 2, the second limiting portion 15 is rotated to be located on the upper surface of the slider 16 to limit the position of the slider 16.

[0053] refer to Figure 5A pressure sensor 21 is installed in the middle of the upper surface of the second connecting plate 4, and the top detection end of the pressure sensor 21 is connected to the second supporting part 20. The upper surface of the second supporting part 20 is arranged at the same height as the upper surface of the fixing part 5, and the upper surface of the second supporting part 20 is in contact with the lower surface of the shell 1; when the shell 1 body shakes in the vertical direction, the shell 1 will transmit different pressures to the second supporting part 20, and the pressure sensor 21 will also obtain corresponding pressure value data at this time; a data processor 22 is fixedly connected to the bottom of the second connecting plate 4, and the data input end of the data processor 22 is connected to the displacement detection part 10 and the pressure sensor 21 signal, and the data output end of the data processor 22 is connected to the acquisition terminal through a data line.

[0054] In this embodiment, the acquisition terminal is effectively positioned and conveniently installed. A power socket can be provided on the vehicle wall or a battery can be installed inside the housing 1 to supply power to the acquisition terminal to ensure its startup and operation. When performing a stability test on a high-speed EMU, an installation component is provided at the display screen of each group of carriages, and a corresponding number of acquisition terminals are installed. When the EMU is running, each acquisition terminal will obtain the stability data in the corresponding EMU carriage, and can transmit it to the same handheld terminal and / or terminal platform to monitor and alarm the stability data of the EMU.

[0055] Example 2

[0056] On the basis of Example 1, the acquisition terminal of this embodiment further includes a power module, a main control module, a storage module, an acquisition module, and a communication module.

[0057] The power module is used for power-on settings and corresponding power management.

[0058] The main control module is used to control the operating status of the storage module, acquisition module, and communication module. When the main control module suspends the operation of the storage module, acquisition module, and communication module, the acquisition terminal will suspend the data collection process in the EMU carriage.

[0059] The storage module is used for the storage and transmission of collected data, that is, to store all the position, acceleration and angular velocity information collected in each measurement. The acquisition terminal interface can be connected to the computer via a data cable to read the stored data, and the data can also be uploaded via wireless transmission.

[0060] The acquisition module is used to collect stability data, which includes position data, three-dimensional acceleration data and three-dimensional angular velocity data. The acquisition module includes a position acquisition module, an acceleration acquisition module and an angular velocity acquisition module, which are respectively used to obtain the GPS positioning data, three-dimensional acceleration data and three-dimensional angular velocity data of the motor vehicle; the position acquisition module signal is connected to the GPS module, the acceleration acquisition module signal is connected to the acceleration sensor, and the angular velocity acquisition module signal is connected to the gyroscope. The GPS module, the acceleration sensor and the gyroscope are all arranged inside the housing 1.

[0061] In this embodiment, specifically, the acceleration sensor has a range of ±8g, a channel number of 3, and collects accelerations in the horizontal, longitudinal, and vertical directions; the gyroscope has a range of ±125° / s, a sensitivity of 160 LSB / ° / s, and a channel number of 3, and can collect angular velocities in three directions of the vehicle, namely, three types of posture information: rolling, nodding, and shaking.

[0062] The communication module is used to provide a variety of communication methods to adapt to various application scenarios. The communication module includes 4G module, Bluetooth module, WiFi module and LoRa wireless module.

[0063] Among them, the 4G module has a relatively long transmission distance, covers a wide range, and provides high-speed data transmission and large-capacity data transmission; the Bluetooth module has a short transmission distance and is suitable for short-distance device-to-device communication; the WiFi module is suitable for wireless connections in a small area and can provide high-speed Internet access; the LoRa wireless module has a very long transmission distance and is suitable for long-distance, low-power communication needs in the Internet of Things. Therefore, the coverage of each module is from large to small, LoRa wireless module, 4G module, WiFi module, Bluetooth module, and the transmission rate is from large to small, 4G module, WiFi module, Bluetooth module, LoRa wireless module.

[0064] In this embodiment, the usage scenarios include but are not limited to the following:

[0065] Scenario 1: When it is necessary to accurately collect the operation information of the train, the collection terminal and the handheld terminal can communicate by switching to the WiFi module to transmit GPS positioning signals, acceleration in three directions, and attitude information in three directions. The transmission frequency can reach 2000Hz.

[0066] Scenario 2: For conventional multiplication measurement, when the amount of data transmitted between the acquisition terminal and the handheld terminal is small, the main control module of the acquisition terminal calculates the stability index. The acquisition terminal and the handheld terminal switch to the LoRa wireless module for data transmission, and use its narrowband long-distance communication characteristics to perform real-time monitoring of stability to meet the test requirements.

[0067] Scenario 3: When an abnormality occurs in the operation of a moving vehicle during the inspection process, the on-board inspection personnel can send an emergency communication command to the collection terminal through a handheld terminal. At this time, the collection terminal sends the currently collected vehicle operation information to the remote emergency command terminal platform in real time through the 4G module for analysis by the command terminal platform.

[0068] Scenario 4: Before getting on the vehicle, the tester can connect to the user's LAN through the WiFi of the handheld terminal, log in to the digital platform to obtain the test task, switch to the WiFi module to connect to the collection terminal to obtain data during the on-vehicle test, and upload the measurement data via WiFi to the LAN when the experiment is over.

[0069] Scenario 5: In the scenario with a local area network, the acquisition terminal and the handheld terminal transmit data through the Bluetooth module, and the handheld terminal can connect to the digital platform through WiFi to upload the measurement data synchronously. It should be noted that due to the low Bluetooth transmission rate, it is necessary to select only the acceleration or angular velocity data to be transmitted according to the test requirements, that is, to support other test requirements except the on-board stability test.

[0070] Example 3

[0071] On the basis of Example 2, this example obtains the above three-dimensional acceleration data and three-dimensional angular velocity data, and determines the stability of the motor vehicle by means of the stability formula and the magnitude of the angular velocity value.

[0072] The qualified value of the horizontal and vertical stability index is recorded as W Xs , W Zs , used to compare the stability of lateral and vertical vibrations, the longitudinal acceleration is recorded as a Yi , the qualified values ​​of angular velocity in the horizontal, longitudinal and vertical directions are denoted as ω Xs ,ω Ys ,ω Zs , the actual angular velocities in the horizontal, longitudinal and vertical directions are denoted as ω Xi ,ω Yi ,ω Zi ; Each acquisition terminal in each EMU carriage will obtain an actual lateral stability index W in each set time period Xi , an actual vertical stability index W Zi , i ranges from 1 to n, n is the total number of EMU carriages, and i is the marked carriage number.

[0073] The main control module obtains W xi , W Zi ,ω Xi ,ω Yi ,ω Zi , in the process of EMU driving, the longitudinal acceleration is not considered for the time being. When starting and stopping the EMU, the longitudinal acceleration is included in the EMU stability judgment. Therefore, in the process of EMU driving, Wxi , W Zi ,ω Xi ,ω Yi ,ω Zi With W Xs , W Zs ,ω Xs ,ω Ys ,ω Zs Compare one by one, in addition to displaying the graph of the corresponding data on the handheld terminal and / or terminal platform, a comparison list A is also established and displayed i Specifically, 0 and 1 are used to represent the corresponding comparison data as unqualified and qualified, respectively. For example, in comparison list A i [0, 0, 0, 1, 1], that is, A i Indicates [W xi >W Xs , W Zi >W Zs ,ω Xi >ω Xs ,ω Yi ≤ω Ys ,ω Zi ≤ω Zs ], through the display of 0 and 1, the qualified status of the data can be quickly obtained.

[0074] The master control module establishes the qualified ratio coefficient, that is, the ratio of qualified data, in the comparison list A i The qualified ratio ξ will be displayed on one side i , qualified proportion coefficient ξ i is the total proportion of 1s in the comparison list, that is, 0≤ξ i ≤1. For the above comparison list, the corresponding qualified ratio coefficient ξ i It is 0.4. When the qualified proportion coefficient is larger, it indicates that it is more stable; when the qualified proportion coefficient is lower, it indicates that the vibration of the EMU car is more serious and more unstable.

[0075] For example, the warning coefficient is set to 0.6. i When ≤0.6, the vibration is serious; the main control module transmits the warning signal to the handheld terminal and / or terminal platform through the LoRa wireless module. According to the vibration of this EMU, the inspection personnel will directly go to the carriage to conduct further verification tests. In order to improve the accuracy of the data, switch and use the WiFi module for data communication transmission. i When it is greater than 0.6, the stability of the carriage is deemed qualified. To save time, no verification test is performed.

[0076] When performing verification testing, obtain W xi , W Zi ,ω Xi ,ω Yi,ω Zi Multiple sets of data at different time points are collected to check whether the vibration is still in a serious state:

[0077] When severe vibration no longer occurs, the rail section with severe vibration will be marked according to the position information of the position acquisition module and transmitted to the terminal platform for further inspection of the corresponding rail; when at least one severe vibration still occurs, the EMU carriage will be marked, and after the journey, the EMU and the connection will be inspected to improve the stability of the EMU during travel, thereby improving the comfort of passengers.

[0078] It should be noted that the qualified values ​​of the lateral stability index, the vertical stability index, the lateral angular velocity, the longitudinal angular velocity and the vertical angular velocity will be adjusted according to the environmental conditions, the number of passengers in the EMU car, etc.

[0079] Example 4

[0080] On the basis of Example 3, this embodiment determines the vibration condition of the acquisition terminal under long-term use through the setting of the data processor 22, the displacement detection unit 10, and the pressure sensor 21, that is, the shell 1 determines the stability of its body during the test.

[0081] The main control module includes a pre-analysis module, which is signal-connected to the data processor 22 , the displacement detection unit 10 , and the pressure sensor 21 .

[0082] In this embodiment, when the shell 1 is used for a long time, when the connected fastening parts become loose, the pressure data of the pressure sensor 21 will fluctuate to a certain extent, and the corresponding vertical shaking situation is obtained according to the pressure fluctuation data; when the displacement detection part 10 detects the longitudinal movement of the fixing part 5, the corresponding longitudinal movement situation is obtained according to the longitudinal movement data; the data processor 22 performs real-time detection of the pressure fluctuation data and the longitudinal movement data; the pre-analysis module is used to judge the shaking situation of the shell 1 according to the acquired data. When the shaking problem occurs, the pre-analysis module transmits a pause signal to the main control module, and the main control module transmits the signal to the handheld terminal, and controls each module to suspend operation, so as to avoid the invalidity of the data collected by the acquisition terminal and eliminate the instability of the acquisition terminal body.

[0083] When the handheld terminal displays the shaking problem, the inspector will check the installation component to find the cause of the shaking. If the shaking problem cannot be solved, the entire installation component or parts will be replaced to ensure the accuracy of data acquisition.

[0084] Example 5

[0085] A method for measuring the stability of a high-speed train set is as follows:

[0086] S1: Lay out the installation components in advance and install the acquisition terminal;

[0087] S2: Determine the stability of the installation of the acquisition terminal;

[0088] S3: When the acquisition terminal is installed stably, the acquisition terminal collects the position data, three-dimensional acceleration data and three-dimensional angular velocity data in the train compartment;

[0089] S4: The collection terminal in each EMU carriage makes a stability judgment in each set time period, and establishes a corresponding comparison list and qualified ratio coefficient, which facilitates the intuitive acquisition of vibration conditions and conducts stability analysis;

[0090] S5: Verify the corresponding data collection terminals based on the results of the stability analysis, identify problems and perform corresponding maintenance to improve the stability of the train and the comfort of passengers during travel.

[0091] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A stability measurement system for high-speed train sets, characterized by: include: A handheld terminal, on which test software is installed, for displaying the collected installation stability data and the running stability data of the motor vehicle in real time; A collection terminal, the collection terminal is connected to the handheld terminal by signal, and is used to collect installation stability and running stability data of the motor vehicle; the collection terminal comprises a housing (1) and a group of antennas (2) connected to the housing (1); the collection terminal also comprises a power module, a main control module, a storage module, a collection module, and a communication module, the collection module comprising a position collection module, an acceleration collection module, and an angular velocity collection module; the main control module is used to compare the stability index qualified value set for each motor vehicle carriage with the actual stability index value, establish a comparison list and a qualified ratio coefficient, and display them on the handheld terminal and / or the terminal platform, indicating the vibration conditions of each motor vehicle carriage, and is used to judge the shaking condition of the housing and make corresponding adjustments; An installation component, the installation component is used to install the acquisition terminal on the motor vehicle, the installation component comprises a first connecting plate (3), a second connecting plate (4), a fixing portion (5), and a first supporting portion (6), the first connecting plate (3) is fixed to the wall of the motor vehicle compartment, the second connecting plate (4) is fixedly connected to the outer surface of the first connecting plate (3), the fixing portions (5) are respectively located at two sides of the bottom of the shell (1) and are fixedly connected to the shell (1), the first supporting portions (6) are respectively located directly below the corresponding fixing portions (5) and are fixedly connected to the second connecting plate (4), and the first supporting portion (6) is detachably fixedly connected to the corresponding fixing portion (5); Each of the first supporting parts (6) is provided with a displacement detection part (10) for detecting the movement of the fixed part (5); the movable end of the displacement detection part (10) is rotatably connected to the first limiting part (11); the first limiting part (11) is connected to the fixed part (5) via a second fastening part (12); a pressure sensor (21) for detecting the shaking of the housing (1) is installed in the middle of the upper surface of the second connecting plate (4); the bottom of the second connecting plate (4) is fixedly connected to a data processor (22); the displacement detection part (10) and the pressure sensor (21) are signal-connected to the input end of the data processor (22); and the output end of the data processor (22) is connected to a collection terminal.

2. A stability measurement system for high-speed train sets according to claim 1, characterized in that: A group of through holes is provided on both sides of the bottom of the housing (1), and a group of the through holes is connected to the fixing portion (5) via bolts.

3. The stability measurement system for high-speed train sets according to claim 1, characterized in that: The fixing portion (5) is in a convex shape, and first slide grooves (8) matching the shapes of the two sides of the fixing portion (5) are provided on both sides of the first supporting portion (6), so that the first supporting portion (6) and the fixing portion (5) can be slidably connected; a convex block (9) is integrally provided in the middle of the first supporting portion (6) and between the two first slide grooves (8), and the height of the upper surface of the convex block (9) is higher than the height of the lower surface of the first slide groove (8), so that the convex block (9) and the first slide groove (8) can limit the fixing portion (5).

4. The stability measurement system for high-speed train sets according to claim 1, characterized in that: The fixing portion (5) and the first supporting portion (6) are provided with first connecting holes of corresponding positions and matching sizes on the same side, and the first connecting hole is internally connected with a first fastening portion (7) so that the fixing portion (5) is stably mounted in the first sliding groove (8).

5. The stability measurement system for high-speed train sets according to claim 1, characterized in that: A second connection hole is provided on the top of the first limiting portion (11) and the front end surface of the fixing portion (5), and the interior of the second connection hole is connected to the second fastening portion (12).

6. The stability measurement system for high-speed train sets according to claim 1, characterized in that: A second sliding groove (19) is provided on the upper portion of the outer surface of the first connecting plate (3) facing the shell (1); a slider (16) is slidably connected to the interior of the second sliding groove (19); a third limiting portion (17) is fixedly connected to the surface of the slider (16); sleeves (18) are fixedly connected to both ends of the third limiting portion (17) and positions corresponding to a group of antennas (2); each sleeve (18) is sleeved on a corresponding antenna (2), so that a group of antennas (2) is always in a vertical state.

7. A stability measurement system for high-speed train sets according to claim 6, characterized in that: The first connecting plate (3) is located on the surface of one side of the sliding block (16) and is fixedly connected to an ear seat (13) corresponding to the bottom position of the second sliding groove (19); a fixed shaft (14) is fixedly connected inside the ear seat (13); one end of the fixed shaft (14) is rotatably connected to a second limiting portion (15); when the second limiting portion (15) is rotated to the top of the sliding block (16), it is pressed on the upper surface of the sliding block (16).

8. The stability measurement system for high-speed train sets according to claim 1, characterized in that: The position acquisition module, acceleration acquisition module, and angular velocity acquisition module are used to obtain the train GPS positioning data, three-dimensional acceleration data, and three-dimensional angular velocity data respectively; The position acquisition module signal is connected to a GPS module, the acceleration acquisition module signal is connected to an acceleration sensor, and the angular velocity acquisition module signal is connected to a gyroscope. The GPS module, the acceleration sensor, and the gyroscope are all arranged inside the housing (1).

9. The stability measurement system for high-speed train sets according to claim 1, characterized in that: A warning coefficient value is pre-set in the main control module. When the qualified proportion coefficient is not greater than the warning coefficient value, the main control module transmits a warning signal to the handheld terminal and / or terminal platform through the communication module, and the inspection personnel will directly reach the car to conduct further verification tests.

10. The method for measuring the stability of a high-speed train set according to any one of claims 1 to 9, characterized in that: Here’s how: S1: pre-laying the installation components and installing the acquisition terminal; S2: Determine the stability of the installation of the acquisition terminal body; S3: When the acquisition terminal is installed stably, the acquisition terminal collects position data, three-dimensional acceleration data and three-dimensional angular velocity data in the train compartment; S4: The acquisition terminal in each motor vehicle carriage makes a stability judgment in each set time period, and establishes a corresponding comparison list and a qualified ratio coefficient to perform a stability analysis; S5: Verify the corresponding acquisition terminal according to the stability analysis results, identify problems and perform corresponding maintenance to improve the stability of the train during travel and the comfort of passengers.

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