Search

CN-122009271-A - Method for judging out of slip working condition based on beacon reading

CN122009271ACN 122009271 ACN122009271 ACN 122009271ACN-122009271-A

Abstract

The invention discloses a method for judging an exit slip working condition based on beacon reading, which comprises the steps of 1, obtaining position information of a first beacon and a second beacon which are arranged on a track, calculating the distance between the first beacon and the second beacon, 2, respectively obtaining the accumulated pulse numbers at the first beacon and the second beacon by a pulse type speed sensor, 3, calculating the minimum pulse distance and the maximum pulse distance between the first beacon and the second beacon according to the accumulated pulse numbers at the first beacon and the second beacon, 4, judging whether the distance between the first beacon and the second beacon is between the minimum pulse distance and the maximum pulse distance, judging that the slip working condition is exited if the distance is between the minimum pulse distance and the maximum pulse distance, and recovering the normal working condition, otherwise, judging that the slip working condition is not exited. Excessive speed measurement faults and subway braking and stopping caused by slight skidding are effectively avoided, and the rail transit operation continuity and the system availability are obviously improved.

Inventors

  • WU SUJIAO
  • JIANG JIANTING

Assignees

  • 众合智行轨道交通技术有限公司

Dates

Publication Date
20260512
Application Date
20251216

Claims (8)

  1. 1. The method for judging the slip-out working condition based on the beacon reading is characterized by comprising the following steps: Step 1, acquiring position information of a first beacon and a second beacon which are arranged on a track, and calculating the distance between the first beacon and the second beacon; Step 2, the pulse speed sensor acquires the accumulated pulse numbers at the first beacon and the second beacon respectively; step 3, calculating the minimum pulse distance and the maximum pulse distance between the first beacon and the second beacon according to the accumulated pulse numbers at the first beacon and the second beacon; And 4, judging whether the distance between the first beacon and the second beacon is between the minimum pulse distance and the maximum pulse distance, if so, judging that the slip working condition is exited, and recovering the normal working condition, otherwise, judging that the slip working condition is not exited.
  2. 2. The method for judging whether to exit the slip condition based on the beacon reading according to claim 1, wherein at least two pulse-type speed sensors are provided, each pulse-type speed sensor independently performs the steps of the steps 2 to 4, and the normal operation state is restored only when it is judged that the slip condition has been exited by all the pulse-type speed sensors.
  3. 3. The method for determining whether to exit the slip condition based on the beacon reading according to claim 1, wherein the step 3 specifically comprises: the method comprises the steps of calculating the accumulated pulse number difference between a first beacon and a second beacon according to the accumulated pulse number of the first beacon and the second beacon, obtaining a theoretical pulse distance according to the wheel circumference divided by the pulse number of each revolution of the pulse speed sensor, multiplying the theoretical pulse distance by the pulse number of the first beacon to the second beacon to obtain the theoretical pulse distance between the first beacon and the second beacon, wherein the tolerance ratio set by the rising of the theoretical pulse distance is the maximum pulse distance, and the tolerance ratio set by the falling of the theoretical pulse distance is the minimum pulse distance.
  4. 4. The method for judging whether the vehicle exits the slip working condition or not based on the beacon reading according to claim 3, wherein the tolerance ratio is 1% -3%, and the tolerance ratio is calibrated according to the wheel abrasion threshold value, the running environment temperature interval and the track flatness level and is dynamically updated through a track line database.
  5. 5. The method for determining whether to exit the slip condition based on the beacon reading according to claim 1, wherein in the step 4, after determining that the slip condition is not exited, the steps 1 to 4 are re-executed until determining that the slip condition has been exited or the time in the slip condition exceeds a set threshold.
  6. 6. The method for determining an exit from a slip condition based on beacon reading according to claim 5, wherein if the time in the slip condition exceeds a set threshold, the slip condition is determined to be in a slip condition, and an alarm signal is sent.
  7. 7. The method for judging out of slip working conditions based on beacon reading according to claim 1, wherein the first beacon and the second beacon are existing beacons preset by a track line, a dense beacon group is arranged in a train station entering interval, and the distance between any two adjacent beacons in the dense beacon group is not more than 5 meters.
  8. 8. The method for judging whether the train exits from the slip working condition based on the beacon reading according to claim 5, wherein the range of the threshold is adjusted according to the running state of the train, the range of the threshold is 10-15 seconds when the train normally runs, the range of the threshold is 5-8 seconds when the train brakes, and the alarm signal is sent to the train-mounted control system and the ground dispatching center.

Description

Method for judging out of slip working condition based on beacon reading Technical Field The invention relates to the technical field of rail traffic safety, in particular to a method for judging a slip-out working condition based on beacon reading. Background In a rail transit signal system, a pulse type speed sensor (OPG: odometer Pulse Generator) mounted on a subway wheel is currently widely used for measuring and calculating the speed of a subway vehicle. The speed measuring principle of the pulse type speed sensor is that the speed of the train transverse movement is calculated by combining the pulse formed by the rotation of the wheels and the circumference of the wheels. The speed measurement mode of the running speed of the train is deduced through the wheel rotation speed, and the phenomenon that the wheel rotation speed cannot accurately reflect the actual speed of the train due to the fact that the wheel slips when the track state is poor needs to be considered. The abnormal state in which the current wheel is slipping is generally determined by detecting an abnormal change in the speed or acceleration calculated by the speed sensor. When the wheel is set to be in the slipping abnormal state and can return to the normal and safe speed measuring state, a certain voting algorithm is needed. In general, under the condition that other speed measuring sensors independent of wheel rotation exist, such as radar and accelerometer, the abnormal state that the wheel has exited from slipping can be judged by checking the speed or the acceleration of the speed measuring sensor data. However, when the vehicle is not in a good installation condition and more sensors cannot be installed or other sensors are in an unavailable state, if the two pulse speed sensors are used for checking each other, the common failure of equipment is considered, the safety function requirement of exiting the slip state cannot be met, the excessive slip fault state is caused when the wheel slip is detected each time, even if the actual wheel is slightly slipped after three or four seconds, the signal system safety speed measurement system also judges that the slip cannot be recovered and enters the speed measurement fault state, and the speed measurement fault can cause the failure of the speed measurement positioning function to cause subway braking and stopping, thereby affecting the operation and the usability of the system. Disclosure of Invention The invention aims to overcome the defects that in the existing track traffic signal system, when no other speed measuring sensor or the speed measuring sensor is unavailable, the safety judgment requirement of the wheel exit slip cannot be met and the usability of the system is influenced only by mutual checking of the pulse speed sensors due to common cause failure, the invention provides a method for judging the exit slip working condition based on beacon reading, and the distance between a first beacon and a second beacon is calculated by acquiring the position information of the first beacon and the second beacon on the track, the pulse type speed sensor acquires the accumulated pulse number at the two beacons, the minimum pulse distance and the maximum pulse distance between the two beacons are calculated according to the pulse number, and then whether the actual distance between the two beacons is between the two distances is judged, so that the purposes of accurately judging the slip condition of the train, avoiding excessive slip speed measurement faults and subway braking and stopping caused by slight slip and guaranteeing the track traffic operation and system availability are achieved. The invention aims at realizing the following technical scheme: The method for judging the exit of the slip working condition based on the beacon reading comprises the following steps: Step 1, acquiring position information of a first beacon and a second beacon which are arranged on a track, and calculating the distance between the first beacon and the second beacon; Step 2, the pulse speed sensor acquires the accumulated pulse numbers at the first beacon and the second beacon respectively; step 3, calculating the minimum pulse distance and the maximum pulse distance between the first beacon and the second beacon according to the accumulated pulse numbers at the first beacon and the second beacon; And 4, judging whether the distance between the first beacon and the second beacon is between the minimum pulse distance and the maximum pulse distance, if so, judging that the slip working condition is exited, and recovering the normal working condition, otherwise, judging that the slip working condition is not exited. Preferably, at least two pulse speed sensors are provided, each pulse speed sensor independently executes the steps from the step 2 to the step 4, and the normal working state is restored only when all pulse speed sensors judge that the slip working condition is exited. Preferably, t