408results about "Railway vehicle testing" patented technology

The invention relates to the technical field of artificial intelligence and computer vision, discloses a subway key component fault detection method and system based on an AI visual large model, and aims to solve the problems of low detection precision, weak generalization ability, insufficient multi-mode understanding, poor real-time performance and lack of state evolution modeling in the prior art. The method comprises the following steps: acquiring images of key components through a multi-view industrial camera array, and performing distortion correction, illumination normalization and noise suppression; a pre-trained visual large model is utilized to extract deep space features, and modeling is carried out on a continuous frame feature sequence through bidirectional LSTM to capture a time sequence change trend. By introducing the large-scale visual large model and spatio-temporal joint modeling, the identification capability of tiny defects is improved, the discrimination stability is enhanced, high-precision and low-delay automatic detection is realized, the false alarm rate and the omission ratio are remarkably reduced, and the detection efficiency and the system maintainability are improved.

The invention relates to the technical field of rail transit monitoring, and discloses a multi-sensor fusion rail transit electric passenger car bogie dynamic performance monitoring method. The method comprises the steps that multi-source heterogeneous sensing data such as bogie vibration acceleration time sequence signals, wheel-rail contact force distribution data, bearing temperature gradient data and structural strain field data are collected; analyzing the vibration signal to extract a frequency band energy feature vector, performing spatial gridding mapping on the contact force data to generate a distribution matrix, and performing time-space alignment fusion on the two to form a primary fusion feature set; positioning a bearing temperature anomaly region through a deep convolutional network, and generating a secondary fusion feature set in combination with a structural strain concentration coefficient; and inputting the two-stage feature set into a dynamic performance evaluation model, outputting a performance degradation index set of scores of axle box bearing wear degree, framework fatigue cumulant, wheel set tread damage and the like, generating a maintenance priority sequence and triggering a preventive maintenance instruction according to the performance degradation index set, and realizing accurate monitoring and efficient operation and maintenance management and control of the dynamic performance of the bogie.

The invention relates to the technical field of damage identification, in particular to a structural defect identification method for brake shoe displacement and damage characteristics of a railway wagon, which comprises the following steps of: in the whole life cycle of the railway wagon, dividing a braking process into a plurality of stages, and performing hierarchical filing according to working condition types and service stages, constructing a brake shoe multi-working-condition structure response file; through longitudinal comparison along a time axis in the same working condition layer and transverse comparison among different working condition layers, screening out a brake shoe ectopic evolution mark and an initial brake shoe damage evolution mark which are sensitive to a structure state; encoding all evolution marks according to a spatial position, a working condition layer and a service stage to form a brake shoe ectopic and damage structure fingerprint sequence; and outputting an identification result including the structure defect type and the severity level, and generating a maintenance priority. According to the method, a space-time coupling mechanism of acoustic emission energy and temperature gradient is introduced to recognize early microcrack propagation, and the recognition sensitivity of recessive fatigue and complex damage modes is improved.

The invention provides a rail vehicle collision test system, which relates to the technical field of rail vehicle collision tests and comprises a collision simulation device, a wall body, a test vehicle body and a data acquisition device. The test vehicle body is configured to move towards the wall body at a preset speed, and dummy passengers are carried in the test vehicle body. The collision simulation device comprises an energy absorption assembly and an adjusting assembly, the energy absorption assembly is installed on the wall and suitable for colliding with the test vehicle body, and the adjusting assembly is configured to respond to the crumple amount of the energy absorption assembly in the collision process and adjust the counter-acting force applied by the energy absorption assembly to the test vehicle body so as to simulate the collision process of the real vehicle with the energy absorption structure. The data acquisition device is arranged on the dummy passenger and is suitable for acquiring data information of secondary collision of the dummy passenger in the test vehicle body.

The invention provides a multi-modal intelligent diagnosis method and system for temperature vibration of a high-speed rail bearing based on a working condition spectrogram, and relates to the technical field of intelligent diagnosis, and the method comprises the steps: synchronously collecting vibration, temperature distribution and phase angle signals of a bearing, and extracting a self-adaptive reference baseline in combination with an operation working condition; and obtaining a temperature vibration joint sequence through phase alignment, calculating a thermal vibration coupling intensity spectrum, and comparing the thermal vibration coupling intensity spectrum with a baseline to obtain circumferential deviation distribution. And after dynamic threshold correction, mapping the over-limit phase interval into a fault space coordinate on the bearing raceway, and determining a fault type according to frequency spectrum characteristics. According to the invention, accurate space positioning and type identification of high-speed rail bearing faults are realized, and the adaptability and accuracy of diagnosis are improved.

The present application relates to the technical field of sealing test, in particular to a railway clamp testing device, which comprises a testing table, a fixing mechanism arranged on the testing table, and an air pipe in communication with an internal air supply device of the testing table, one end of the air pipe being in communication with a connector; the connector comprises a pipe body, a distance sensor, and an adjusting piece, one end of the pipe body being rotatably provided with a connecting pipe, the pipe body being internally provided with a contraction part and a piston piece. In the railway clamp testing device, the piston plate and the contraction part are arranged to cooperate with each other in the pipe body, so that the piston plate can isolate the inside of the pipe body by moving in or out, and then the piston plate can automatically displace according to the change of air pressure, on the one hand, the driving of the connecting pipe is realized, and the number of times of twisting the connecting pipe is reduced, on the other hand, the piston plate can move according to the air leakage position, so that the air leakage position can be obtained according to the moving state, and whether the clamp leaks air can be quickly understood.

A diagnosis device (1) is provided with a data generation unit (11), an approximate rotation speed acquisition unit (12), a rotation speed acquisition unit (13), and a diagnosis unit (14). The data generation unit (11) generates, from a vibration sensor signal output by a vibration sensor (92) for measuring the magnitudes of vibration of a subject appliance, spectrum data indicating the distribution of the per-frequency magnitudes of vibration of the subject appliance. The approximate rotation speed acquisition unit (12) obtains an approximate rotation speed, which is an approximate value of the rotation speed of a rotating body of the subject appliance. The rotation speed acquisition unit (13) acquires, as the rotation speed of the rotating body, a frequency corresponding to the peak of the spectrum data in a frequency band including the approximate rotation speed. The diagnosis unit (14) diagnoses the conditions of the subject appliance on the basis of the peak value of the peak of the spectrum data in the frequency band including the diagnosis subject frequency corresponding to the rotation speed acquired by the rotation speed acquisition unit (13).

The invention provides an impact test device and method for a brake disc of a high-speed train, and relates to the technical field of impact test equipment, the impact test device comprises a base, a brake disc to be detected is placed on a placement table, an impact seat falls under the action of gravity to impact the brake disc to be detected above the placement table, and a base plate is arranged below the base. A mounting base plate is mounted at the bottom end of the base plate, the base plate is fixedly mounted on the ground by means of the mounting base plate, a buffer unit is arranged between the base and the base plate, and when the impact seat impacts the placement table under the action of gravity, impact force can be removed by means of the buffer unit; the arc-shaped elastic piece, the damping part and the buffering rubber ball are matched with a multi-stage buffering structure of self-adaptive pressurization of the air cylinder, and graded unloading and energy dissipation can be carried out on instantaneous strong loads after impact.

This application provides a method, apparatus, device, and medium for determining the characteristic frequencies of dynamic response data of rail vehicles, relating to the field of rail vehicle technology. The method determines the resonant frequency band in the dynamic response based on the known excitation frequency of the operating line, and separates the dynamic response data according to the energy change rate of the resonant frequency band to obtain vehicle vibration response data, thereby determining the characteristic frequencies of target vehicle components. This overcomes the problems of existing technologies where fixed-band filtering cannot adapt to the differences in excitation characteristics of different lines, easily leads to insufficient interference filtering or over-filtering that mistakenly deletes effective information, and manual frequency selection relies on experience, is inefficient, and has subjective judgment errors, making it difficult to adapt to scenarios with large changes in rail vehicle speed and complex operating conditions. It can accurately eliminate line excitation interference, accurately extract the characteristic frequencies of vehicle components, and improve the accuracy and reliability of characteristic frequency identification.

The application relates to the technical field of railway vehicle detection, and discloses a bearing vibration detection and identification method based on an octave and a voting mechanism, which is characterized in that bearing detection of passing vehicles is completed through a bearing running-in test platform arranged on a railway site to form actual detection data; the bearing running-in test platform comprises a contact part used for directly contacting an outer ring of a measured bearing, an acceleration sensor and a microphone are arranged on the contact part; vibration acceleration data is formed through acceleration sensor detection of bearing vibration; sound pressure level data is formed through microphone detection of bearing vibration; and the vibration acceleration data and the sound pressure level data together form vibration transmission data. The application can more accurately complete bearing vibration detection and identification and can be applied to actual railway vehicle detection and identification.

The invention relates, among other things, to a method for measuring the condition of wheels, wheelsets and / or brake systems of railway vehicles (200) by generating condition data (CDs). According to the invention, a measuring device (10) temporarily attached to a first mounting interface (211) of a first railway vehicle (200) during maintenance and / or inspection determines the condition by measuring, generating one or more first condition data (CDs).

The utility model discloses a shielding door state monitoring device, which relates to the technical field of monitoring devices and comprises a moving mechanism, the moving mechanism comprises a guide rail, an adjusting screw and a motor, the outer wall of the adjusting screw is sleeved with a mounting seat in a threaded manner, one end of the mounting seat is fixedly provided with a mounting plate, and the motor drives the adjusting screw to rotate. A plurality of positioning rods are fixedly mounted at one end of the mounting plate, and the outer walls of the positioning rods are slidably sleeved with a mounting box; through mutual cooperation of an audible and visual alarm, a door state acquisition module, a signal processing and analysis module, a control module, a power supply management module and a moving mechanism, when the state of the shielding door is abnormal, a motor and the audible and visual alarm work, the moving mechanism drives the audible and visual alarm to vertically move upwards, the warning effect of the audible and visual alarm is improved, and the safety of the shielding door is improved. And when no abnormal condition exists, the equipment is hidden at a low position, so that the probability that the equipment is damaged by mistaken touch is reduced, and the applicability is high.

The embodiment of the present application relates to the technical field of railway transportation safety, and discloses a calibrating device for the force of a coupler of a railway train. The calibrating device comprises a fixing frame, an actuator assembly and a fixing mechanism. The fixing frame is used for fixing the actuator assembly. One end of the actuator assembly is fixedly connected with the fixing frame, and the other end acts on the coupler to apply a load force to the coupler. The fixing mechanism is located below the actuator assembly and is used for fixing the coupler. The technical scheme provided by the present application solves the problems that the calibrating work of the coupler under various complex loads is difficult to be realized in the prior art, and the calibration of the coupler is difficult to be objectively and accurately completed. The calibrating work of the coupler under various complex loads can be realized, so that the calibration of the coupler can be objectively and accurately completed.

A method and a device for diagnosing a defect in a pantograph of a railway vehicle and calculating its remaining service life are disclosed. The method may include setting a status value for diagnosing the pantograph, building a database with indexes for diagnosing the pantograph, comparing a detected index with a reference index, and storing a defect code of the pantograph if the detected index is greater than the reference index in the database.The status value can refer to the pressure of an actuator when the pantograph is raised before the rail vehicle is in motion, to the actuator pressure while the rail vehicle is in motion, to the number of arcing occurrences or the duration of arcing events while the rail vehicle is in motion, to an insulation resistance while the rail vehicle is in motion, or to the wear amount of a main wear slider. Furthermore, the device configured to carry out the method is disclosed.

The utility model discloses a scaling rolling test bench, and relates to the technical field of railway vehicle testing. In the scaling rolling test bed, a track wheel system comprises a track wheel driving module and track wheels connected to the track wheel driving module, and the track wheels comprise six-component wheels; the wheel system comprises a wheel driving module and a scaling wheel connected to the wheel driving module, and the scaling wheel is arranged above the track wheel; the vertical loading system is arranged above the scaled wheel so as to provide a vertical load for the scaled wheel. The rail wheel comprises a six-component wheel, the rail wheel can be directly measured to obtain three-dimensional force and torque, errors caused by indirect calculation by additionally arranging strain gauges on the rail wheel in the prior art are avoided, the testing precision of the wheel rail vibration boundary condition can be improved, meanwhile, the steps of arranging, designing and assembling the strain gauges in the prior art can be avoided, and the testing efficiency is improved. And the assembling convenience is improved.

The utility model relates to the technical field of locomotive maintenance, in particular to a locomotive low-voltage equipment test bed, which comprises a test cabinet, a maintenance cabinet and a disassembly and assembly cabinet which are sequentially spliced to form a U-shaped structure. The equipment test bench with a concave structure is provided, so that a reasonable operation range and an operation platform can be provided for a whole set of experiments of testing, overhauling, dismounting and mounting of low-voltage equipment, the low-voltage equipment is prevented from being frequently transferred in a workshop, the working intensity of the low-voltage equipment experiment is reduced, and the experiment efficiency of the low-voltage equipment is improved. And actual working requirements are met.

The application provides a train emergency braking system performance degradation trend detection method, device and medium, the method collects brake cylinder pressure in each emergency braking process in real time, forms brake cylinder pressure curves of each emergency braking, extracts characteristic values of brake cylinder pressure curves of each emergency braking, calculates degradation factors of each emergency braking according to predetermined characteristic reference values and characteristic values of each emergency braking, and detects train emergency braking system performance degradation trend according to the degradation factors of each emergency braking. The method of the application is based on brake cylinder pressure in each emergency braking process, calculates degradation factors of each emergency braking, detects train emergency braking system performance degradation trend according to the degradation factors of each emergency braking, improves the accuracy of degradation detection, realizes continuous monitoring of braking system performance, and improves the safety of train travel and maintenance efficiency.

The invention discloses a railway vehicle impact positioning method, device and equipment and a medium, and relates to the technical field of computers, and the method comprises the steps: obtaining a guided wave signal outputted by each piezoelectric sensor when a to-be-detected composite material of a railway vehicle is impacted; the piezoelectric sensor is arranged on the surface of the composite material to be detected; constructing a positioning model based on the installation position of each piezoelectric sensor and the flight time of the guided wave signal, and determining an error function of the positioning model; the function is used for quantifying the deviation between the theoretical distance and the actual distance; the theoretical distance is obtained based on the assumed coordinate of the potential impact point and the mounting position of the piezoelectric sensor, and the actual distance is obtained based on the flight time and the propagation speed of the guided wave signal; and outputting the optimal coordinate estimation of the potential impact point and the optimal propagation speed estimation of the guided wave signal by minimizing the error function. According to the invention, the inherent error caused by the constant wave velocity is avoided; the engineering implementation cost is reduced; the positioning precision is obviously improved; and the real-time performance of impact positioning is ensured.

The invention relates to a rail vehicle rolling vibration test bench-based wheel rail position relation measurement method and system, computer equipment and a medium. The method comprises the following steps: S1, measuring the displacement variation of a wheel and a track wheel in the movement process; s2, calculating respective transverse displacement and attack angle of the wheel and the track wheel based on the displacement variation; s3, based on the transverse displacement of the wheel and the transverse displacement of the track wheel, the rim clearance of the wheel and the track wheel in the movement process is calculated; and S4, when the rim gap is greater than a preset value, calculating the equivalent taper between the wheel and the track wheel based on the rim gap. By adopting the method, the wheel rail position relation can be accurately measured through the rolling vibration test bed of the railway vehicle.

This invention provides a fault prediction diagnostic device, fault prediction diagnostic method, and program that shorten the preparation period required for introducing fault prediction diagnostics. [Solution] A fault prediction diagnostic device 100 for detecting signs of failure in running-related equipment 21 mounted on multiple mobile bodies 20a, 20b, comprising: an operation history data calculation unit 120 that calculates operation history data including the operating time of the running-related equipment 21 and output usage conditions calculated based on the operation information of output-using equipment 22a, 22b that use the output of the running-related equipment 21; an operation history correction unit 130 that corrects the operation history data by a correction process that corrects individual differences of each running-related equipment 21 and calculates corrected operation history data; and a fault prediction diagnostic unit 150 that diagnoses signs of failure in the running-related equipment 21 by comparing the corrected operation history data with a group of corrected operation history data of multiple past mobile bodies 20a, 20b that satisfy predetermined conditions based on the output usage conditions.

The invention belongs to the technical field of track detection equipment, discloses a wheel set lifting and leveling device of a vehicle wheel set full-size measuring machine, and solves the problems that in the prior art, the wheel set lifting precision is insufficient, and the reference height cannot be accurately determined. The device comprises a movable box body, a lifting mechanism, a wheel set supporting and driving mechanism, a lifting displacement detection mechanism and a rim measurement mechanism, the lifting mechanism drives a lifting frame to ascend and descend through a lifting oil cylinder, a linear displacement sensor detects lifting displacement in real time, it is guaranteed that the heights of four driving wheels are consistent, and horizontal lifting of a wheel set is achieved; the wheel rim measuring mechanism accurately measures and calculates the diameter of a wheel rim through a three-point method in cooperation with a displacement sensor, the height of the center line of a wheel set is determined, and unification of measuring references is achieved. The device is compact in structure, high in lifting and leveling precision and stable in detection data, can greatly improve the accuracy of full-size measurement of the motor train unit wheel set, and meets the use requirements of a mobile measuring machine.

The invention relates to the technical field of dynamic model experiment test platforms, and discloses a trailer mechanism and model effective separation method based on the trailer magnetic eddy current deceleration principle, and the method comprises the following steps: 1, carrying out the flexible connection of a piston type trailer and a model vehicle through a connecting rope; 2, compressed air is introduced into the air inlet A and the air inlet B; 3, when the driving piston crosses the air leakage hole by 1 m, the piston type trailer moves to a separation area, the piston type trailer decelerates, and the model car moves at a constant speed; 4, the distance between the piston type trailer and the model vehicle is reduced, the flexible connection is loosened, and the flexible connection is separated from the model vehicle; 5, driving a piston to move to an air leakage hole, decelerating the piston type trailer to be static, and enabling the model vehicle to enter a test section; and 6, after the piston type trailer is static, the piston type trailer, the traction cable and the driving piston are pushed to move back by a certain distance. Safe separation of the trailer mechanism and the model vehicle is guaranteed, and the separation effect can be guaranteed even at a high speed.

The invention provides a subway train equipment fault detection system, and relates to the technical field of rail transit, the system comprises a data acquisition module, a signal processing module, a data storage module and a fault detection module, the data acquisition module is used for receiving target operation data of a target subway train through a vehicle gateway; the signal processing module is used for sequentially performing signal processing, data analysis and data comparison on the target operation data to obtain a comparison result; the data storage module is used for storing a comparison result; and the fault detection module is used for receiving the comparison result from the data storage module based on a preset instruction, and performing fault detection based on the comparison result to obtain a fault detection result. According to the subway train equipment fault detection system provided by the invention, automatic subway train equipment fault detection is realized, manual data troubleshooting is not needed, and the subway train equipment fault detection efficiency is improved.

The utility model provides a subway handrail rigidity testing device which comprises a bottom bearing assembly, a top bearing assembly, a switching supporting assembly, a bottom matching assembly, a top matching assembly and a pushing and pressing force application assembly. According to the subway handrail rigidity testing device, a containing space capable of containing a subway handrail is defined by a bottom frame, a top frame and an adapting stand column, a bottom adapting assembly composed of an adapting bottom frame and an adapting bottom column is arranged on the bottom frame, and a top adapting assembly composed of an adapting top beam and an adapting top column is arranged on the top frame; the vertical frames at the two ends of the subway handrail can be fixed to the matched connection bottom columns through connecting bolts respectively, the vertical frames at the two ends of the subway handrail and a cross rod in the middle of the subway handrail can be fixed to the matched connection top columns through connecting bolts respectively, and the universality and flexibility of the testing process can be improved; and the stress condition in actual use can be simulated, so that the rigidity of the armrest can be accurately tested.

The invention relates to a method for monitoring and diagnosing components (2, 4) of a rail vehicle, as a singular rail vehicle or as part of a rail vehicle train consisting of a plurality of rail vehicles, with regard to the necessary repair or maintenance, as appropriate, of at least one component (2, 4), in which at least one measuring device (6, 8) captures at least one measurement variable, which is relevant to an assessment of a necessary repair or maintenance, as appropriate, of the component (2, 4), an evaluation of the captured measurement variable with regard to a repair or maintenance of the affected component (2, 4), which is necessary immediately or in the future as appropriate, is carried out by an evaluation software implemented in an evaluation device (10, 12) arranged on board the rail vehicle or rail vehicle train, and, in the event that the evaluation device (10, 12) deems that it is necessary for a repair or maintenance of the corresponding component (2, 4) to be carried out immediately or in the future, a message (14, 16) in this respect is generated by the evaluation device (10, 12) and transmitted to a control center (28), which is located outside the rail vehicle (1) or outside the rail vehicle train. The invention is characterized by supplementation, extension, modification or adaptation of the evaluation software implemented in the evaluation device (10, 12) by means of instructions, data and / or software modules sent from the control center (28) to the evaluation device (10, 12).

A probe support apparatus (12) for an ultrasonic flaw detector (10) is described. It comprises a probe holder (20) having at least two receptacles (42, 44) for ultrasonic probes (14, 16), and at least two magnetic rollers (22). The receptacles (42, 44) are inclined towards each other such that a middle axis (46) of a first receptacle (42) and a middle axis (48) of a second receptacle (44) are perpendicular to the axes (24) of rotation of the rollers (22). Additionally, an ultrasonic flaw detector (10) comprising such a probe support apparatus (12) is presented. Furthermore, a method for inspecting a wheelset axle using an ultrasonic flaw detector (10) is provided.

The utility model discloses a wheel stopper for a bogie static load testing machine, which comprises a fixed arm fixedly mounted on a guide rail of the testing machine, the fixed arm is 7-shaped, a rotating arm is movably mounted at the bottom of the fixed arm, a wheel stopping wedge block is fixedly connected to the top end of the rotating arm, and the wheel stopping wedge block is fixedly connected to the bottom end of the rotating arm. The lower portion of the rotating arm extends to form a transverse rod consistent with the installation direction of the fixed arm, a rotating shaft is movably installed on the transverse rod, a supporting rod is movably connected to the rotating shaft in an inserted mode, a balance weight is installed at the bottom of the supporting rod, a spring is connected to the portion, between the balance weight and the rotating shaft, of the supporting rod in a penetrating mode, and a limiting block is arranged on the upper portion of the supporting rod. When the guide rail of the testing machine descends, the counter weight slowly contacts with the cement boss on the site again, and the rotating arm is driven to rotate upwards under the pressure of the lower spring, so that the bottom surface of the wheel stopping wedge block is pushed to the surface of the rail, and the bogie is effectively prevented from falling off when entering and exiting the static load testing machine. The design does not depend on manual operation, so that the device is effectively suitable for high-efficiency production.

The application discloses a station building structure vibration source positioning method and device based on an array sensor, and relates to the technical field of structure health monitoring. The method comprises the following steps: collecting vibration signals of multiple station building structure points when multiple trains pass through a station building area through an array sensor, and obtaining multiple vibration signal sets; obtaining station building characteristics of the station building area, and indexing multiple positive sample vibration signal sets of a same-family station building; obtaining multiple train characteristics of the multiple trains, combining multiple positive sample train characteristics, station building characteristics and same-family station building characteristics, configuring vibration signal fitting conditions through intelligent sensor fitting configuration rules; and performing iterative fitting in the multiple vibration signal sets by using the multiple positive sample vibration signal sets according to the vibration signal fitting conditions, obtaining multiple vibration fitting confidence coefficients, and screening to obtain a vibration source positioning result. The application realizes rapid and accurate identification and early warning of abnormal vibration of a station building structure.

The application discloses a gear box for integrated variable speed gear shifting synchronization and multifunctional test bed, belonging to the field of rail transit technology, comprising an input shaft group, an output shaft group, a right synchronization shaft group, a left synchronization shaft group, a box body, a sealing structure, a lubricating system and a state monitoring module; the input shaft group comprises an input shaft and bearing one, and two groups of fixed gears with different teeth numbers are arranged on the input shaft; the output shaft group comprises bearing two, bearing three and gear one. The core of the gear box is integrated with the input shaft group, the output shaft group, the right synchronization shaft group, the left synchronization shaft group, the matched box body, the sealing structure, the lubricating system and the state monitoring module, three core functions of variable speed, gear shifting and synchronization are integrated, and no additional auxiliary equipment such as independent gear box and synchronization box is needed, so that the equipment layout of the test bed is greatly simplified, the occupied space is reduced, the installation and debugging difficulty caused by the connection of multiple devices is reduced, and the space utilization and overall compactness of the test bed are improved.