546 results about "Derailment" patented technology

A method of inspecting a turnout of a track includes the steps of: capturing images of the components of the turnout; converting each image into a set of coordinates that traces the transverse cross-section of a rail profile; analyzing the rail profile to determine if the rail profile is a profile of arunning rail portion or a component. Upon determination that the image represents a component, taking measurements of the rail profile and applying virtual gauges to the rail profile to check for potentially dangerous conditions of the component; and generating a summary of each cross-section of the rail profile of the component indicating problem areas. The method is used for identifying certain classes of switch or turnout rail conditions which can lead to derailments, and for enhancing the turnout inspection approach currently used. The use of this method as an integrated part of the rail profile monitoring program will reduce reliance on field measurements and will also allow more frequent, comprehensive, and convenient analysis of turnout condition.

A solution for monitoring a railway vehicle is provided. A vehicle node and one or more sensor nodes are deployed on the railway vehicle. Each sensor node is configured to acquire data and communicate with the vehicle node only when certain conditions are met. The sensor node(s) and vehicle node can evaluate operating conditions to determine whether an alert should be sent to initiate action. In an illustrative application, the alert can correspond to excessive hunting by a wheelset of the rail vehicle which is posing a danger for derailment.

The disclosed system includes network central station in locomotive, and network junction station in each carriage. Both of the said network central station and network junction station is as front end, back end, data acquisition and execution unit and power section of equipment including digital signal processor and free space optical communication portion (FSO) of the forwarding and device control center. FSO includes optical transceivers A and B. In charge of carrying out continuous monitoring in real time for state of locomotive and carriages, data acquisition part in the data acquisition and execution unit includes wind pressure sensor, thermal axis sensor, bearing sensor, derailment detector, digital camera etc. The execution unit controls a banking locomotive to act operations accordant with main locomotive. The execution unit for carriage controls braking and releasing electropneumatic valve.

The invention discloses a ballastless track damage analysis method performing combined solution based on definite element expansion and fatigue analysis. The method includes the following steps that a definite element model of a ballastless track is built; needed loads and boundary conditions are applied to the definite element model, and stress analysis is performed on the definite element model; a stress analysis result is imported into fatigue analysis software, and fatigue performance analysis of the definite element model is performed; based on a definite element expansion method, fracture mechanics parameters of materials of the track structure are defined in the definite element model, service life critical portions obtained during fatigue performance analysis are selected as damaged regions, and generation of damage and a continuous development evolution rule are calculated; a train wheel track coupling model is added on the definite element model, damage is applied to the truck structure, the transverse acceleration, the vertical acceleration, the derailment coefficient and the wheel weigh load reducing rate of a train are calculated after the damage happens to the track structure, and influences of the damage on running of the train are analyzed.

The invention discloses a railway vehicle active obstacle and derailment detection system, which includes an obstacle and railway detection unit, a data processing unit and a train control system which are electrically connected mutually. The obstacle and railway detection unit are used for scanning objects around the railway vehicle and a running railway during driving, and obtaining object point cloud data, object information and track image information, in the data processing unit, initial point cloud data, initial image information and initial track image information obtained by a camera of objects around the railway vehicle obtained by the radar in the normal driving process are pre-stored, a result is analyzed and fed back to the train control system by integrating and comparing information fed back by the obstacle and railway detection unit with memory information of the obstacle and railway detection unit, and according to the analysis result, the train control system gives control instructions to the train running state actively. According to the way, the railway vehicle active obstacle and derailment detection system can find abnormalities in time and give active braking instructions to the vehicle.

The invention relates to a train navigation monitoring early warning system which comprises a navigation monitoring early warning module, a power supply module and a monitoring center, wherein the navigation monitoring early warning module comprises an inertia navigation module, a wireless communication module and an image processing module; the power supply module is connected with the navigation monitoring early warning module; the monitoring center comprises a server and a wireless communication module, and the server is connected with the navigation monitoring early warning module by a wireless network. The early warning method comprises the following steps: the navigation monitoring early warning module measuring the acceleration of a train in real time by adopting an accelerometer, and collecting the attitude information of the train in running by adopting a gyroscope; adopting an inertial navigation algorithm to calculate the collected acceleration data and the attitude information in a central processor to obtain the train running speed and the position information of the train; and adopting the image processing module to collect the situation of surrounding objects of the train in running, so as to judge whether a barrier exists in front of the train. The train navigation monitoring early warning system can effectively prevent the occurrence of abnormal events such as train derailment, collision or the like.

The disclosed is a derailment protection apparatus that may comprise a wheel guiding member or a rail contact member having an inclined surface, a descending device to descend the wheel guiding member or the rail contact member, and wherein the inclined surface comes in contact with a rail, when the descending device operates. The derailment protection apparatus may return a wheel of a rolling stock to be deviated from a rail to a normal position, when the rolling stock with a bogie receives an abnormal vibration due to such as earthquake.

The invention discloses an evaluation method for the impact of ballastless track typical damage on the operation safety of a high-speed train. The method is based on the dynamic model of a ballastlesstrack structure, and is characterized in that, based on the theory of space vibration analysis of a train-track system, track dynamics and random analysis of train derailment energy, through mechanics reasonable simplification, all kinds of typical damage of ballastless tracks are simulated to establishes the dynamic model of ballastless track structure in damaged state, and the vibration response ofdifferent damage types or different degree of the same damage on the track system is analyzed and calculated. Based on the dynamic calculation results and the damage classification criteria, the influence of different degrees of damage on the ride comfort and safety of ballastless track is determined. On the basis of reducing labor intensity, the invention can quickly determine the influence of various damage of ballastless track on the operation of high-speed train, thereby providing a basis for timely adopting corresponding maintenance measures and further providing a guarantee for the safe operation of the high-speed train.

There is obtained an electric-vehicle controller that prevents energy stored in a power storage unit from being discharged in the case where a collision, a derailment, or breakage of an overhead line occurs. The electric-vehicle controller is provided with a DC-to-DC converter one terminal pair of which is connected to the DC power source side of the inverter, a power storage unit that is connected to the other terminal pair of the DC-to-DC converter and stores electric power, a switch provided between the power storage unit and the DC-to-DC converter, and a control unit that opens the switch in the case where abnormal circumstances may occur or have occurred.

The invention provides an early-warning method for vehicle derailment based on steel-rail deformation or stress parameters. The method comprises the following steps: (1) collecting the metrical data of a sensor; (2) generating an event when the vehicle passes the early-warning test point on the basis of the axle-number information of a train and the metrical data of the sensor, and starting an early-warning process for derailment; (3) obtaining the coefficient of vehicle derailment, the data of load reduction rate and the date of scar early-warning by the steel-rail deformation or the stress parameters; (4) estimating the train derailment tendency according to the coefficient of vehicle derailment , the data of load reduction rate and the data of scar early-warning; and (5) determining whether an early-warning operation for the vehicle derailment is carried out according to the estimating results. The invention can be utilized to integrate the monitoring of various traveling safety parameters into one system, thereby avoiding the complexity of a related monitoring system.

The invention relates to a car derailment warning method, which comprises the following steps: a sensor is mounted on a sensor connecting rod between two rails; when derailed wheels press the sensor connecting rod, the sensor sends out derailment signals to ground control equipment; a main control unit of the ground control equipment receives the derailment signals and sends out derailment early warnings and emergency breaking instructions; a coding unit codes the derailment early warnings and emergency breaking instructions and sends coded instructions to a derailed train and a nearby train by a transmitter; a vehicle station located on the derailed train or the nearby train receives and analyzes the derailment early warnings and emergency breaking instructions; a breaking device of the train is initiated to stop the train. The car derailment automatic early warning system comprises the sensor connecting rod, the sensor, the main control unit, the coding unit, the transmitter and the vehicle station. The method and system of the invention can avoid the occurrence of a secondary accident to the train after derailment and reduce loss of casualty and property caused by the accident.

A carriage lateral movement-limiting system capable of effectively restricting the lateral movement of a derailed carriage. The system comprises derailment prevention guards (62a, 62b) laid along the inside of paired left and right rails (60a, 60b), and a lateral movement-limiting device (52) installed on the lower part of the carriage (30). The device (52) has a stopper (51) projecting downward at a position between the wheels (36a, 36b) of the carriage and brought into slidingly contact with the inner surfaces of the derailment prevention guards (62a, 62b) when the carriage is derailed.

The invention relates to a railway wagon fault image recognition method, in particular to a railway wagon derailment automatic brake valve cock handle closing fault image recognition method. The objective of the invention is to solve the problem that the existing railway wagon derailment automatic brake valve cock handle closing fault image identification accuracy is low. The method comprises thesteps: 1, building equipment around a truck rail, and obtaining two-dimensional images of the two sides of a truck; 2, carrying out derailment automatic brake valve cock handle part coarse positioningon the obtained two-dimensional image; 3, establishing an original sample data set based on the derailed automatic brake valve cock handle part image of coarse positioning; 4, carrying out data set amplification on the original sample data set; 5, obtaining a trained positioning model SSD and a classification model VGG16; and 6, according to the fault information, generating a message according to the fault position and the fault type, and uploading the message to an alarm platform. The method is applied to the field of rail wagon fault image recognition.

The invention provides a train operation safety online monitoring method based on vibration acceleration. The method comprises the following steps that the vibration acceleration data of the wheels onthe train within a certain period of time are acquired; the wheel uplift amount and the wheel side-sway amount of the train are acquired based on the vibration acceleration data within the period oftime; whether the peak value of acceleration and the absolute value of acceleration of the vibration acceleration data within the period of time and the wheel uplift amount and the wheel side-sway amount simultaneously meet the respective preset threshold is judged so as to acquire the judgment result; and derailing trend judgment is performed and alarming is performed if the judgment result is yes. The train operation safety online monitoring method based on vibration acceleration is low in computational burden, fast in computational speed and suitable for online monitoring; and only the acceleration sensor is used so that the cost is low and installation is convenient. Four derailment indicators are applied to judge train derailing so that the comprehensiveness is high and reflection ofthe derailing state is more comprehensive.

A method and a device for the recognition of a derailment state of a wheel (RAD) of a rail vehicle. The acceleration of the wheel (RAD) is measured perpendicularly to a rail plane (ε) with at least one acceleration sensor (SEN), whereby from an acceleration signal (BSI) generated by the acceleration sensor (SEN) by means of simple integration (INT) over a time window of predeterminable magnitude, one determines a fall speed (FAG) of the wheel (RAD) in the direction of the rail plane (ε), and whereby on the basis of the determined fall speed (FAG), one examines whether a derailed state exists.

An elevator installation has a guide rail of a predetermined length and a movable body configured to move along the guide rail up and down a hoistway. A proximity sensor is mounted on the movable body to be in a predetermined proximity of the guide rail. The proximity sensor is configured to detect whether or not the proximity sensor is at the predetermined distance to the guide rail. A controller coupled to the proximity sensor acts upon an indication that the proximity sensor is not at the predetermined distance to the guide rail to switch the elevator installation to a secure state.

A method of estimating contact forces between the wheels of a railway wagon and a rail track, for use in determining information such as the likelihood of derailment. Accelerations of the body of the wagon are measured using motion sensors located at suitable points on the body. Forces on the side frames of the wagon are calculated based on the accelerations of the body and predetermined parameters of the body. Forces on the wheels of the wagon are calculated based on the accelerations of the body and predetermined parameters of the body. The contact forces between the wheels and the rails are then calculated based on the forces calculated for the side frames and the wheels. The calculations are carried out using an inverse model of the wagon system. Equipment which implements the method is also described.

The invention discloses a braking device for a railcar. The braking device is arranged on a wheel carrier of a wheel set of the railcar. The braking device for the railcar comprises a braking frame arranged on the wheel carrier, wherein the braking frame comprises a rail sleeve capable of half-encircling a steel rail; a T-shaped groove is formed in the rail sleeve; brakes fixedly connected to the rail sleeve are arranged between the inner top, the left side part, the right side part, the left bottom and the right bottom of the rail sleeve and the steel rail. The steel rail is half-encircled by the T-shaped groove of the rail sleeve, the T-shaped groove turns to the bottom side of the steel rail, the brakes are arranged on the inner side of the rail sleeve, and are positioned between the rail sleeve and the steel rail, and gaps are formed between the brakes and the steel rail when the railcar normally runs, and are pneumatically expanded to drive the brakes to be closely attached to the steel rail to encircle the steel rail from the top, the left side part, the right side part, the left bottom and the right bottom in case of emergency braking, so that the railcar is synchronously braked under equal pressure in five gears and five points in emergency, derailment and tailgating are avoided, damage to the steel rail at low gears is avoided, safety is ensured by sacrificing the steel rail at high gears, and higher reliability of braking within a visual distance is achieved.

The invention discloses a derailment safety protective device which is shaped like an inverted L. The derailment safety protective device comprises a transverse part (1-1) and a longitudinal part (1-2) which is located below one side of the transverse part (1-1) and perpendicular to the transverse part (1-1). An installation seat formed by an outwards extending wing plate (1-3) is arranged at the two sides of the transverse part (1-1) in the width direction, and bolt holes (1-4) are formed in the installation seat; the inner side face of the longitudinal part (1-2) is a stopping face (1-6). The derailment safety protective device is simple in structure, small in size, light in weight, easy to install, maintain and replace, reasonable in structural design, stable and reliable in contact mode with a rail, stable and reliable in mechanical property during contact, and capable of remarkably improving the safety protective level of a vehicle.