Simulation test device, system and method suitable for cable of railway vehicle

Abstract

The invention provides a simulation test device. The simulation test device comprises a base station; the mounting mechanism is mounted on the base station; the first end of the driving mechanism is mounted on the base station, and the second end of the driving mechanism is configured to translate in three mutually perpendicular axis directions and / or rotate around the three axis directions to drive a test cable mounted between the second end of the driving mechanism and the mounting mechanism to act; the simulation module is used for simulating the actual movement of a tested cable mounted on a tested vehicle; and the detection mechanism is configured to detect the on-off state of the test cable in real time so as to evaluate the state and the fatigue life of the tested cable.

Description

Technical Field

[0001] The present disclosure relates to the technical field of rail vehicles, and more specifically, to a simulation test device, system and method for cables of rail vehicles. Background Art

[0002] Cables are an important component of high-speed trains. There are many types of cables and they play multiple roles during vehicle operation.

[0003] Power cables provide safe and stable power supply for vehicles. Communication cables and signal cables can transmit data and signals between high-speed rail and control center, as well as convey information such as driving direction, speed, speed limit, etc. to trains. Such information plays a vital role in the accuracy, safety and convenience of high-speed rail travel.

[0004] Cables are distributed between vehicle ends, at the connection points between the bogie and the car body, and at the connection points between the motor and the car body. Because some cables have large dimensions, their own strength, stiffness, and fatigue life are key factors that cannot be ignored. During the service life of the vehicle, fatigue damage to the cables will cause irreversible damage to the entire vehicle system. Summary of the invention

[0005] In view of this, the present disclosure provides a simulation test device, system and method for cables of rail vehicles, which can implement non-destructive testing of cables under test on rail vehicles.

[0006] As one aspect of an embodiment of the present disclosure, a simulation test device is provided, comprising: a base; a mounting mechanism mounted on the base; a driving mechanism, a first end of the driving mechanism mounted on the base, and a second end of the driving mechanism configured to translate in three mutually perpendicular axial directions and / or rotate around the three axial directions, driving a test cable mounted between the second end of the driving mechanism and the mounting mechanism to move, so as to simulate the actual movement of a test cable installed on a test vehicle; and a detection mechanism configured to detect the on / off state of the test cable in real time, so as to evaluate the state and fatigue life of the test cable.

[0007] According to an embodiment of the present disclosure, the fatigue cycle of the driving mechanism driving the test cable to move is determined based on the average operating speed, service time and operating mileage of the vehicle under test; the single movement process of the fatigue cycle is determined based on the curve radius, transition curve length and line under-superelevation information of the line on which the vehicle under test runs.

[0008] According to an embodiment of the present disclosure, the detection mechanism is further configured to obtain displacement data of the test cable, and generate an alarm message when the displacement data exceeds a maximum preset displacement.

[0009] According to an embodiment of the present disclosure, the detection mechanism includes: a momentary break meter, which is electrically connected to the test cable, and is suitable for detecting the on-off state and the time point of the test cable in real time; and a plurality of displacement sensors, which are installed on the driving mechanism and are configured to detect the displacement data of the test cable on a first axis, a second axis and a third axis, wherein the first axis, the second axis and the third axis are perpendicular to each other.

[0010] According to an embodiment of the present disclosure, the driving mechanism includes: a first mounting seat, mounted on the base; a first mounting plate, arranged to be spaced relative to the first mounting seat and suitable for mounting the first end of the test cable; and a telescopic assembly, which is ball-hinged between the first mounting seat and the first mounting plate and is constructed to drive the first mounting plate to translate in the first axis direction, and / or the second axis direction, and / or the third axis direction and / or rotate around the first axis, the second axis and the third axis.

[0011] According to an embodiment of the present disclosure, the mounting mechanism includes: a second mounting seat, mounted on the base opposite to the first mounting seat; a second mounting plate, mounted on the second mounting seat and configured to mount the second end of the test cable; and a sliding positioning assembly, mounted on one end of the second mounting seat close to the base and slidingly engaged with a slide rail on the base to adjust the distance between the second mounting plate and the first mounting plate.

[0012] According to an embodiment of the present disclosure, the above-mentioned simulation test device also includes: a first mounting bracket and a second mounting bracket, which are respectively mounted on the first mounting plate and the second mounting plate, and the two ends of the test cable are respectively mounted on the first mounting bracket and the second mounting bracket, and the installation distribution method of the two ends of the test cable is the same as the installation distribution method of the cable under test on the vehicle under test; a plurality of mounting holes are provided on the first mounting plate and the second mounting plate to adjust the installation positions of the first mounting bracket and the second mounting bracket.

[0013] As another aspect of an embodiment of the present disclosure, a simulation test system is provided, comprising: an acquisition device, configured to obtain actual motion data of a vehicle under test; a simulation device, which performs simulation modeling on the vehicle under test based on the actual motion data, and obtains an action simulation signal of a cable under test on the vehicle under test; and any one of the above-mentioned simulation test devices, which drives the test cable to move based on the action simulation signal, and obtains the on-off state of the test cable, so as to evaluate the state and fatigue life of the test cable.

[0014] As another aspect of the embodiment of the present disclosure, a simulation test method is provided, which adopts the above-mentioned simulation test system and includes:

[0015] Obtaining actual motion data of the vehicle under test;

[0016] Performing simulation modeling on the vehicle under test based on the actual motion data to obtain a motion simulation signal of the cable under test on the vehicle under test; and

[0017] The test cable is driven to move based on the action simulation signal, and the on / off state of the test cable is acquired in real time to evaluate the state and fatigue life of the test cable.

[0018] According to an embodiment of the present disclosure, the actual motion data includes: the service time and operating mileage of the tested vehicle, the curve radius of the line on which the tested vehicle runs, the transition curve length and line under-superelevation information.

[0019] According to the simulation test device of the embodiment of the present disclosure, the test cable is installed between the installation mechanism and the driving mechanism. When driven by the driving mechanism, the test cable can translate in three mutually perpendicular axial directions and / or rotate around three axes, and can truly simulate various actual movements that the tested cable may encounter on the tested vehicle, including stretching, compression, bending and torsion, etc. The on-off state and displacement data of the test cable are detected by the detection mechanism, and the state and fatigue life of the tested cable are evaluated, thereby realizing non-destructive detection of the tested cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and other objects, features and advantages of the present disclosure will become more apparent through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0021] Figure 1 A perspective view schematically shows a model test device according to an embodiment of the present disclosure;

[0022] Figure 2 A partial stereoscopic diagram of a simulation test device according to an embodiment of the present disclosure is schematically shown;

[0023] FIG3 schematically shows a perspective view of a telescopic assembly according to an embodiment of the present disclosure;

[0024] Figure 4 A partial perspective view schematically shows a test cable installation according to an embodiment of the present disclosure;

[0025] Figure 5 The circuit diagram of the O / S test part of the instantaneous interruption instrument according to the embodiment of the present disclosure is schematically shown;

[0026] Figure 6 The flowchart of the simulation test method according to the embodiment of the present disclosure is schematically shown.

[0027] The following are the descriptions of the reference numerals:

[0028] 1. Base; 11. Slide rail; 2. Mounting mechanism; 21. Second mounting seat; 22. Second mounting plate; 3. Driving mechanism; 31. First mounting seat; 32. Telescopic assembly; 33. First mounting plate; 4. Detection mechanism; 41. Force sensor; 42. Displacement sensor; 5. First mounting bracket; 6. Second mounting bracket; 7. Mounting hole; 8. Test cable. DETAILED DESCRIPTION

[0029] Hereinafter, embodiments of the present disclosure will 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 present disclosure. In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present disclosure. However, it is apparent that one or more embodiments may also be implemented without these specific details. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present disclosure.

[0030] The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The terms "comprise", "include", etc. used herein indicate the existence of the features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0031] All terms (including technical and scientific terms) used herein have the meanings commonly understood by those skilled in the art unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0032] When using expressions such as "at least one of A, B, and C, etc.", they should generally be interpreted according to the meaning of the expression commonly understood by those skilled in the art (for example, "a system having at least one of A, B, and C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.).

[0033] Figure 1 A perspective view schematically shows a model test device according to an embodiment of the present disclosure, Figure 2 A partial perspective view of a simulation test device according to an embodiment of the present disclosure is schematically shown.

[0034] As one aspect of the embodiments of the present disclosure, a simulation test device is provided. Figure 1 and Figure 2As shown, the simulation test device includes a base, a mounting mechanism, a driving mechanism and a detection mechanism. The mounting mechanism is mounted on the base. The first end of the driving mechanism is mounted on the base, and the second end of the driving mechanism is configured to translate in three mutually perpendicular axial directions and / or rotate around three axial directions, driving the test cable installed between the second end of the driving mechanism and the mounting mechanism to move, so as to simulate the actual movement of the tested cable installed on the tested vehicle. The detection mechanism is configured to detect the on-off state of the test cable in real time, so as to evaluate the state and fatigue life of the tested cable.

[0035] According to the simulation test device of the embodiment of the present disclosure, the test cable is installed between the installation mechanism and the driving mechanism. When driven by the driving mechanism, the test cable can translate in three mutually perpendicular axial directions and / or rotate around three axes, and can truly simulate various actual movements that the tested cable may encounter on the tested vehicle, including stretching, compression, bending and torsion, etc. The on-off state and displacement data of the test cable are detected by the detection mechanism, and the state and fatigue life of the tested cable are evaluated, thereby realizing non-destructive detection of the tested cable.

[0036] According to an embodiment of the present disclosure, the kind and type of the test cable is the same as the kind and type of the tested cable on the tested vehicle.

[0037] According to an embodiment of the present disclosure, the vehicle under test may be a rail vehicle, such as a train, a high-speed train, etc.

[0038] According to an embodiment of the present disclosure, when the simulation test device simulates the actual movement of the tested cable between adjacent vehicle ends of the tested vehicle, the installation distribution mode of the test cable installed between the installation mechanism and the drive mechanism is the same as the installation distribution mode of the tested cable on the tested vehicle. When the tested vehicle is actually moving, both adjacent vehicle ends will move. Therefore, the relative movement between the two adjacent vehicle ends is equivalent to the relative movement of the second end of the drive mechanism in the simulation test device relative to the installation mechanism, thereby simulating the actual movement of the tested cable installed on the tested vehicle.

[0039] According to an embodiment of the present disclosure, the second end of the driving mechanism can translate in three mutually perpendicular axis directions or rotate around three axes, wherein the three mutually perpendicular axes can be respectively the X axis, the Y axis and the Z axis. The detection mechanism detects the displacement data of the test cable on the X axis, the Y axis and the Z axis respectively, and evaluates the state and fatigue life of the tested cable in combination with the on-off data of the test cable, so as to ensure the safety and durability of the tested cable during long-term use.

[0040] According to an embodiment of the present disclosure, the fatigue cycle of the driving mechanism driving the test cable action is determined based on the running route, service time and operating mileage of the vehicle under test.

[0041] According to the embodiments of the present disclosure, the fatigue cycle of the test cable action is determined according to the running route, service time and operating mileage of the tested vehicle, which can more accurately simulate the actual use of the cable and provide a scientific basis for the design, manufacture and performance evaluation of the cable.

[0042] According to an embodiment of the present disclosure, the fatigue cycle is the number of cycles that a cable experiences before fatigue failure occurs under repeated loads. The fatigue damage of a cable is related to the magnitude of the stress and the number of cycles.

[0043] In an exemplary embodiment, the tested vehicle passes through the S curve 8 times a day, is put into operation 300 days a year, and passes through the S curve 2400 times a year. In 30 years of service, it passes through the S curve 72,000 times, and the fatigue cycle is rounded to 100,000 times.

[0044] The operating capacity of the drive mechanism is the operating frequency. It takes 15 seconds to complete a one-way motion process, 240 times an hour, 5760 times a day, and 100,000 fatigue cycles take about 17 days.

[0045] According to the embodiments of the present disclosure, a single movement process of the fatigue cycle is determined based on the curve radius, transition curve length, and line under-superelevation information of the line on which the tested vehicle is running. By accurately simulating the movement of the tested cable on the actual line, the fatigue performance of the cable under specific line conditions can be more accurately evaluated.

[0046] According to an embodiment of the present disclosure, the curve radius refers to the radius of a circle formed by the center line of the track in the curve portion.

[0047] According to an embodiment of the present disclosure, the transition curve length refers to the length of a smooth transition area from a straight track to a curved track.

[0048] According to an embodiment of the present disclosure, the line superelevation information refers to the height difference of the track centerline in the curved part relative to the straight part.

[0049] According to an embodiment of the present disclosure, the detection mechanism is further configured to obtain displacement data of the test cable, and generate an alarm message when the displacement data exceeds a maximum preset displacement, thereby avoiding cable breakage due to excessive displacement of the test cable and improving the accuracy of the test.

[0050] According to an embodiment of the present disclosure, the maximum preset displacement may be the maximum displacement that the test cable can withstand, and the maximum displacement may be determined according to the length of the test cable. For example, the maximum preset displacement may be any one of 10 cm, 20 cm, or 30 cm.

[0051] According to the embodiments of the present disclosure, Figure 1 and Figure 2As shown, the driving mechanism includes a first mounting seat, a first mounting plate and a telescopic assembly. The first mounting seat is mounted on the base, and the first mounting plate is arranged relative to the first mounting seat and is spaced apart, and is suitable for mounting the first end of the test cable. The telescopic assembly is ball-hinged between the first mounting seat and the first mounting plate, and is configured to drive the first mounting plate to translate in the first axis direction, and / or the second axis direction, and / or the third axis direction and / or rotate around the first axis, the second axis and the third axis.

[0052] According to the embodiments of the present disclosure, the telescopic assembly enables the first mounting plate to translate in three mutually perpendicular axial directions (the first axis, the second axis and the third axis) and rotate about three axes, thereby achieving six degrees of freedom of movement. It can simulate the force conditions and motion trajectory of the cable under test in various directions, thereby improving the accuracy of the test.

[0053] FIG. 3 schematically shows a perspective view of a telescopic assembly according to an embodiment of the present disclosure.

[0054] In an exemplary embodiment, Figure 1 and Figure 3 As shown, the telescopic assembly may include six telescopic modules, and the six telescopic modules are divided into three groups of telescopic units, and each group of telescopic units includes two telescopic modules. The first ends of the two telescopic modules in each group of telescopic units are close to each other, and the ball is hinged to the first mounting seat to form a first connection area, and the three first connection areas of the first ends of the three groups of telescopic units form an equilateral triangle. The second ends of the two telescopic modules in each group of telescopic units are away from each other, and are close to the adjacent telescopic modules in the two adjacent groups of telescopic units, respectively, and the ball is hinged to the first mounting plate to form a second connection area. The three second connection areas of the second ends of the three groups of telescopic units are interlaced with the three first connection areas, and the three second connection areas also form an equilateral triangle.

[0055] According to the embodiments of the present disclosure, the six telescopic modules are installed with the first mounting seat and the first mounting plate in a ball-jointed manner, which can satisfy the telescopic modules to freely extend and retract at any angle in the spatial range, so that the first mounting plate can move freely at any angle and can stop at any time. The test cable is installed between the first mounting plate and the mounting mechanism of the drive mechanism according to the installation distribution of the tested cable on the tested vehicle. The telescopic component of the drive mechanism is actuated to drive the first mounting plate to swing, thereby driving the test cable to swing, so as to simulate the actual movement of the tested cable on the tested vehicle.

[0056] In an illustrative embodiment, the telescopic module may be a hydraulic cylinder or a pneumatic cylinder, etc., which is not limited here. The driving mechanism further includes a control module, and the six telescopic modules operate under the control of the control module to drive the first mounting plate to translate or rotate in the first axis direction and / or the second axis direction and / or the third axis direction, thereby realizing six-degree-of-freedom motion of the first mounting plate.

[0057] The six telescopic modules of the driving mechanism drive the first mounting plate to realize six-degree-of-freedom motion in space under the control of the control module. The travel in the spatial X-axis direction is ±250mm, the travel in the Y-axis direction is ±380mm, the travel in the Z-axis direction is ±380mm, the rotation angle around the X-axis is ±25°, the rotation angle around the Y-axis is ±18°, and the rotation angle around the Z-axis is ±20°. The force sensor detects the force and torque of the first end of the first mounting plate or the test cable on the X-axis, Y-axis and Z-axis. The displacement sensor detects the position coordinates of the first end of the first mounting plate or the test cable on the X-axis, Y-axis and Z-axis.

[0058] According to the embodiments of the present disclosure, Figure 1 and Figure 2 As shown, the mounting mechanism includes a second mounting seat, a second mounting plate and a sliding positioning assembly. The second mounting seat is mounted on the base relative to the first mounting seat, and the second mounting plate is mounted on the second mounting seat and is configured to mount the second end of the test cable. The sliding positioning assembly is mounted on one end of the second mounting seat close to the base and slidably cooperates with the slide rail on the base to adjust the distance between the second mounting plate and the first mounting plate.

[0059] Specifically, the sliding positioning assembly includes a slider and a positioning bolt. The slider is installed at the bottom of the second mounting seat, the slider is an inverted T-shaped block, and the slide rail is a T-shaped slot that slides with the slider. The positioning bolt is threadedly connected to the slider.

[0060] According to the embodiment of the present disclosure, before installing the test cable, the second mounting seat is moved according to the length of the test cable and the distance between the two ends of the test cable and the tested vehicle, so that the slider moves on the slide rail, thereby adjusting the distance between the second mounting plate and the first mounting plate. After the position of the second mounting seat is determined, the positioning bolt is tightened, and the positioning bolt is pressed against the slide rail to prevent the second mounting seat from moving relative to the slide rail, thereby fixing the second mounting seat relative to the slide rail, so as to be suitable for test cables of different lengths and the actual installation conditions of the test cables, thereby more accurately simulating the actual movement of the tested cable installed on the tested vehicle.

[0061] Figure 4 A partial perspective view schematically shows a test cable installation according to an embodiment of the present disclosure.

[0062] According to the embodiments of the present disclosure, Figure 2 and Figure 4 As shown, the simulation test device further includes a first mounting frame and a second mounting frame, the first mounting frame and the second mounting frame are respectively mounted on the first mounting plate and the second mounting plate, the two ends of the test cable are respectively mounted on the first mounting frame and the second mounting frame, and the installation distribution mode of the two ends of the test cable is the same as the installation distribution mode of the tested cable on the tested vehicle. A plurality of mounting holes are provided on the first mounting plate and the second mounting plate to adjust the installation position of the first mounting frame and the second mounting frame, thereby improving the convenience of adjusting the installation position of the test cable.

[0063] According to an embodiment of the present disclosure, one end of the test cable installed on the first mounting frame may be fixed by a wire clamp.

[0064] According to the embodiments of the present disclosure, Figure 2 As shown, the detection mechanism includes a plurality of displacement sensors installed on the driving mechanism and configured to detect displacement data of the test cable on a first axis, a second axis and a third axis, wherein the first axis, the second axis and the third axis are perpendicular to each other.

[0065] In an exemplary embodiment, the detection mechanism may further include a force sensor. The force sensor is mounted on the driving mechanism and is configured to detect force data of the test cable on the first axis (X axis), the second axis (Y axis) and the third axis (Z axis).

[0066] In an illustrative embodiment, Figure 2 As shown, the force sensor is installed between the second mounting plate and the second mounting frame, and a plurality of displacement sensors are installed on the second mounting frame.

[0067] The force sensor may be a six-component force sensor, and the force sensor is installed between the second mounting plate and the second mounting bracket. The force sensor is configured to detect force data of the test cable on the first axis, the second axis, and the third axis. The force data includes force and torque on the X axis, the Y axis, and the Z axis, respectively.

[0068] The displacement sensor may be a laser displacement sensor. A plurality of displacement sensors are mounted on the second mounting frame and are configured to detect displacement data of the test cable on the first axis, the second axis, and the third axis. The displacement data includes position coordinates on the X axis, the Y axis, and the Z axis.

[0069] According to an embodiment of the present disclosure, the detection mechanism includes a momentary break instrument (not shown in the figure). The momentary break instrument is electrically connected to the test cable and is suitable for real-time detection of the on / off state of the test cable and recording the time point when the cable breaks.

[0070] The instantaneous disconnection tester is a detection system for the instant disconnection of wire harnesses and connectors during swinging / vibration. It has high measurement accuracy, fast speed, and is easy to use and understand. The test results are processed and analyzed by a computer, and it can also be connected to external equipment such as code readers and barcode printers.

[0071] In an illustrative embodiment, a transient disconnection meter that integrates short circuit, on-resistance, withstand voltage, insulation, and transient disconnection tests can be selected. The transient disconnection meter has a standard 512-point / 256-group loop and can monitor the tested cable in real time. Before testing the tested cable, the transient disconnection meter needs to be set, including the type of wire, whether there is capacitance in the wire, whether to stop at an empty point or stop the test when a short circuit test error occurs, select the test speed, select the single-side sensitivity, short circuit end judgment setting, etc. By setting the transient disconnection time, the contact reliability of the connector and its components (wiring harness) during the swing / vibration test can be detected in real time.

[0072] The test principle of the instantaneous interrupter is based on the open circuit / short circuit (O / S) test principle.

[0073] Figure 5 The schematic diagram shows the O / S test circuit diagram of the instantaneous interruption instrument according to the embodiment of the present disclosure. It can be understood that, Figure 5 Only a part of the channels in the test circuit of the instantaneous interruption instrument are shown.

[0074] like Figure 5 As shown, the test circuit of each channel includes a voltage output terminal (PIN1, PIN2, PIN3, ...) and a preset voltage input terminal. The preset voltage input terminal transmits the preset voltage (VSC1, VSC2, VSC3, ...) to the voltage output terminal through a switch. The first receiving terminal of the comparator is electrically connected to the voltage output terminal and is grounded through a reference resistor (RF1, RF2, RF3, ...). The second receiving terminal of the comparator receives the set voltage (VSET), and the output terminal of the comparator outputs the comparison result (the judgment value of O / S).

[0075] During the test, the voltage output terminal (PIN1, PIN2, PIN3, ...) outputs the corresponding preset voltage (VSC1, VSC2, VSC3, ...) through the switch output. Multiple comparators compare the receiving voltage (V1, V2, V3, ...) of the first receiving terminal of the comparator with the set voltage (VSET) of the second receiving terminal of the comparator. If the receiving voltage is higher than the set voltage VSET, it is judged as a short circuit (SHORT), and if the receiving voltage is lower than VSET, it is judged as an open circuit (OPEN).

[0076] The O / S judgment value is set by changing the VSET value. The O / S judgment value is the impedance of the wire network. The larger the O / S judgment value, the smaller the VSET. Each channel has a reference resistor. When multiple reference resistors are connected together, the reference resistors will produce a parallel effect. The actual value of the reference resistor becomes smaller, causing V1, V2, etc. to decrease. Since VSET has been set unchanged, the result is that the network impedance increases.

[0077] According to the simulation test device of the embodiment of the present disclosure, fatigue test is combined with instantaneous break detection technology to improve test efficiency and save test cost. Moreover, the test results can provide test data support for simulation.

[0078] As another aspect of the embodiment of the present disclosure, a simulation test system is provided, the simulation test system comprising an acquisition device, a simulation device and any one of the above-mentioned simulation test devices. The acquisition device is configured to obtain actual motion data of the vehicle under test. The simulation device simulates and models the vehicle under test based on the actual motion data, and obtains a motion simulation signal of a cable under test on the vehicle under test. Any of the above-mentioned simulation test devices drives the test cable to move based on the motion simulation signal, obtains the on-off state of the test cable, and evaluates the state and fatigue life of the test cable.

[0079] According to the simulation test system of the embodiment of the present disclosure, the actual motion data of the tested vehicle is obtained by the acquisition device, and the simulation device creates a highly realistic vehicle motion model based on the actual motion data, so that the simulation test is closer to the actual use of the tested cable. By simulating the actual motion of the tested cable in the experimental environment, potential problems are discovered, thereby optimizing the design of the tested cable, achieving non-destructive testing of the tested cable, and reducing testing costs and risks.

[0080] Figure 6 The flowchart of the simulation test method according to the embodiment of the present disclosure is schematically shown.

[0081] As another aspect of the embodiment of the present disclosure, a simulation test method is provided, which adopts any of the above simulation test systems. The simulation test method includes operations S610 to S630.

[0082] In operation S610, actual motion data of the vehicle under test is obtained.

[0083] In operation S620, simulation modeling is performed on the vehicle under test based on the actual motion data to obtain a motion simulation signal of the cable under test on the vehicle under test.

[0084] In operation S630, the test cable is driven to act based on the action simulation signal, and the on / off state of the test cable is acquired in real time to evaluate the fatigue life of the test cable.

[0085] According to the simulation test system of the embodiment of the present disclosure, by acquiring the actual motion data of the tested vehicle, a highly realistic vehicle motion model is created based on the actual motion data, so that the simulation test is closer to the actual use of the tested cable. By simulating the actual motion of the tested cable in the experimental environment, potential problems are discovered, thereby optimizing the design of the tested cable, achieving non-destructive testing of the tested cable, and reducing testing costs and risks.

[0086] According to an embodiment of the present disclosure, the actual motion data includes: the running route, service time and operating mileage of the tested vehicle, the curve radius of the line on which the tested vehicle runs, the transition curve length and the line under-superelevation information.

[0087] According to the embodiment of the present disclosure, the fatigue cycle of the action simulation signal is determined according to the running route, service time and operating mileage of the tested vehicle. The single action process of the fatigue cycle is determined according to the curve radius, transition curve length and line under-superelevation information of the line on which the tested vehicle runs.

[0088] According to an embodiment of the present disclosure, the simulation test method further includes:

[0089] Remove the test cable and perform continuity analysis on it;

[0090] Compare the continuity analysis result with the continuity status. If the continuity analysis result is inconsistent with the continuity status, use a new cable to retest.

[0091] In an illustrative embodiment, a simulation test method is provided, comprising:

[0092] Acquiring actual motion data of the vehicle under test includes collecting curvature information of the line on which the vehicle under test is running, wherein the curvature information includes one or more of the curve radius, transition curve length, and line under-superelevation information.

[0093] According to the actual motion data of the vehicle, a simulation model is established to obtain the motion simulation signal of the cable under test on the vehicle under test. The whole vehicle dynamics of the vehicle under test is modeled and simulated. Different speed level settings, different track spectrum settings, different wheel taper settings and different curve settings are set.

[0094] Determine the six-degree-of-freedom coordinates of the displacement space of the cable under test.

[0095] The test cable is connected according to the fixing method of the tested cable on the tested vehicle, and the connectors, wire clamps, wire troughs and other supporting tools are restored in a 1:1 ratio.

[0096] The six-degree-of-freedom coordinates of the cable space are input into the driving mechanism, so that the driving mechanism moves according to the set curve.

[0097] The test cable is driven to move based on the motion simulation signal, so that the driving end moves according to the set curve, and the number of movements is converted according to the service life of the train to evaluate the fatigue life of the cable. During the test, the detection mechanism detects the on-off state and displacement data of the test line in real time.

[0098] Before the test, first fix the test cable or connector between the drive mechanism and the installation mechanism, arrange the test cable, and crimp the various wiring harnesses or connector cables of the cable in sequence on the wiring panel of the instantaneous interrupter. The crimping must be neat and in place according to the sequence of wire numbers.

[0099] Then conduct the conduction debugging of each circuit to prevent the omission of individual wiring harnesses.

[0100] After repeated debugging, the initial state of each harness or connector measurement point is confirmed, and the initial state measurement point is recorded, and the debugging work is completed. After the test begins, the cable state is monitored in real time using the instantaneous disconnection instrument, and the cable instantaneous disconnection is judged according to the conduction state of the measurement point, so as to accurately evaluate the cable state and cable life, and achieve the result of non-destructive testing.

[0101] According to the simulation test device, system and method for cables of rail vehicles of the embodiment of the present disclosure, fatigue test of the tested cables on rail vehicles is designed. The simulation test device can realize six-degree-of-freedom motion in space, fix the test cable according to the actual assembly mode of the tested vehicle, install a six-component force sensor between the second mounting plate and the second mounting frame, and test the forces and moments in three directions during the motion process. At the same time, laser displacement sensors are arranged on the first axis (X axis), the second axis (Y axis) and the third axis (Z axis) of the motion end, respectively, and the reference is set in the working range of the laser displacement sensor, so that the motion variables can be detected in real time. The real motion state of the cable can be obtained by using the vehicle dynamics simulation software, and the real motion state of the tested cable can be reproduced by using the driving mechanism, so that the displacement data of the test cable during the motion process can be detected, and the cycle and test time of the fatigue motion can be calculated according to the service time and operating mileage of the current vehicle. The state of the test cable is detected in real time by the instantaneous break detection technology, so as to evaluate the state and fatigue life of the tested cable.

[0102] It will be appreciated by those skilled in the art that the features described in the various embodiments of the present disclosure may be combined and / or combined in a variety of ways, even if such combinations or combinations are not explicitly described in the present disclosure. In particular, without departing from the spirit and teachings of the present disclosure, the features described in the various embodiments of the present disclosure may be combined and / or combined in a variety of ways. All of these combinations and / or combinations fall within the scope of the present disclosure.

[0103] The embodiments of the present disclosure are described above. However, these embodiments are only for illustrative purposes and are not intended to limit the scope of the present disclosure. Although the embodiments are described above, this does not mean that the measures in the various embodiments cannot be used in combination to advantage. Without departing from the scope of the present disclosure, those skilled in the art may make a variety of substitutions and modifications, which should all fall within the scope of the present disclosure.

Claims

1. A simulation test device, characterized in that: include: abutment; A mounting mechanism, mounted on the base; A driving mechanism, wherein a first end of the driving mechanism is mounted on the base, and a second end of the driving mechanism is configured to translate in three mutually perpendicular axial directions and / or rotate around the three axial directions, driving a test cable mounted between the second end of the driving mechanism and the mounting mechanism to move, so as to simulate the actual movement of the tested cable mounted on the tested vehicle; as well as The detection mechanism is configured to detect the on / off state of the test cable in real time to evaluate the state and fatigue life of the tested cable.

2. The simulation test device according to claim 1, characterized in that: The fatigue cycle of the driving mechanism driving the test cable to move is determined according to the average running speed, service time and operating mileage of the tested vehicle; The single movement process of the fatigue cycle is determined according to the curve radius, transition curve length and line under-superelevation information of the line on which the tested vehicle runs.

3. The simulation test device according to claim 1 or 2, characterized in that: The detection mechanism is further configured to obtain displacement data of the test cable, and generate an alarm message when the displacement data exceeds a maximum preset displacement.

4. The simulation test device according to claim 3, characterized in that: The detection mechanism includes: An instantaneous disconnection instrument, electrically connected to the test cable, and adapted to detect the on / off state and the time point of the test cable in real time; A plurality of displacement sensors are mounted on the driving mechanism and are configured to detect the displacement data of the test cable on a first axis, a second axis and a third axis, wherein the first axis, the second axis and the third axis are perpendicular to each other.

5. The simulation test device according to claim 1 or 2, characterized in that: The driving mechanism comprises: A first mounting seat, mounted on the base; A first mounting plate, arranged opposite to and spaced from the first mounting seat, and suitable for mounting the first end of the test cable; and The telescopic assembly is ball-hinged between the first mounting seat and the first mounting plate, and is constructed to drive the first mounting plate to translate in the first axis direction, and / or the second axis direction, and / or the third axis direction and / or rotate around the first axis, the second axis and the third axis.

6. The simulation test device according to claim 5, characterized in that: The mounting mechanism comprises: A second mounting seat, mounted on the base opposite to the first mounting seat; a second mounting plate, mounted on the second mounting seat and configured to mount the second end of the test cable; and The sliding positioning assembly is installed at one end of the second mounting seat close to the base and slidingly cooperates with the slide rail on the base to adjust the distance between the second mounting plate and the first mounting plate.

7. The simulation test device according to claim 6, characterized in that: Also includes: A first mounting bracket and a second mounting bracket are mounted on the first mounting plate and the second mounting plate respectively, two ends of the test cable are mounted on the first mounting bracket and the second mounting bracket respectively, and the installation distribution mode of the two ends of the test cable is the same as the installation distribution mode of the cable under test on the vehicle under test; A plurality of mounting holes are provided on the first mounting plate and the second mounting plate to adjust the mounting positions of the first mounting bracket and the second mounting bracket.

8. A simulation test system, characterized in that: include: A collection device configured to obtain actual motion data of the vehicle under test; A simulation device, which performs simulation modeling on the vehicle under test based on the actual motion data, and obtains a motion simulation signal of the cable under test on the vehicle under test; as well as The simulation test device according to any one of claims 1 to 7 drives the test cable to move based on the action simulation signal, obtains the on / off state of the test cable, and evaluates the state and fatigue life of the test cable.

9. A simulation test method, characterized in that: The simulation test system according to claim 8 comprises: Obtaining actual motion data of the vehicle under test; Performing simulation modeling on the vehicle under test based on the actual motion data to obtain a motion simulation signal of the cable under test on the vehicle under test; and The test cable is driven to move based on the action simulation signal, and the on / off state of the test cable is acquired in real time to evaluate the state and fatigue life of the test cable.

10. The simulation test method according to claim 9, characterized in that: The actual movement data includes: the service time and operating mileage of the tested vehicle, the curve radius of the line on which the tested vehicle runs, the transition curve length and line under-superelevation information.

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