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Rail transit train speed measuring method and system

A technology for rail transit train and speed measurement, which is applied in linear/angular velocity measurement, radio wave measurement system, speed/acceleration/shock measurement, etc. problems, achieve high measurement accuracy and dynamic range, and ensure the effect of measurement accuracy

Pending Publication Date: 2020-11-13
胡运成
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Problems solved by technology

[0004] However, the existing solutions can only understand the current approximate position of the train, and cannot judge the running speed of the train in real time, so it is difficult to accurately predict the stop and start time of the train

Method used

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  • Rail transit train speed measuring method and system
  • Rail transit train speed measuring method and system

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Embodiment 1

[0040] The r of this scheme is calculated according to the following method:

[0041] Compute the lower bound value r of r min , r min is the radius of the corresponding receiving range when the signal sent by only one signal transmitting device 3 is received when the train 2 is stopped;

[0042] Compute the upper bound value r of r max , r max is the furthest receiving radius of the signal receiving device 1;

[0043] r=(r min + r max ) / 2.

[0044] In addition to the scheme given in this scheme, the value of r can also be r min and r max The rest of the intermediate values ​​in , specifically to make the detection results stable, the margin is sufficient as the value principle.

[0045]Therefore, the most basic core operator selected in this scheme is:

[0046] In the past T seconds, set the maximum value K of broadcast times of the same beacon received within the receiving range 4 .

[0047] Step 2, calculate the current maximum speed v of the train according to K...

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Abstract

The invention relates to the technical field of train speed measurement, in particular to a rail transit train speed measuring method and system. A signal receiving device calculates the maximum valueK of the broadcasting times of the same signal transmitting device received in the set receiving range in the past T seconds in real time; the signal receiving device reads vector output data of theacceleration sensor in real time, and when the variable quantity of the vector output data in any direction of x, y and z exceeds a set threshold value, the instantaneous speeds vx, vy and vz of the train in the x, y and z directions are calculated respectively; vacc is calculated according to vx, vy and vz; the current maximum speed vmax of the train is calculated according to K; and the currentspeed v of the train is calculated according to the vacc and the vmax. A plurality of Bluetooth beacons are arranged on a train, the maximum value of the broadcast times of the same beacon received within a certain range within a certain time is used as a core operator, then the current maximum speed of the train is measured, and the method has high measurement precision and a dynamic range.

Description

technical field [0001] The invention relates to the technical field of train speed measurement, in particular to a method and system for measuring the speed of rail transit trains. Background technique [0002] The existing rail transit train diagram is designed and formulated by the rail transit management department, and based on the train diagram, the train operation is actually controlled through the signal system. The train operation diagram belongs to the operation plan, not the actual state. Therefore, the outside world cannot accurately determine the location and operation status of the train based on the published train operation diagram. [0003] In the current solution, the Bluetooth transmitting device is deployed on the train, the Bluetooth receiving device is deployed on the platform, and the received Bluetooth signal is transmitted to the central server to realize the perception function of the train arrival, so as to realize the cloud construction of the trai...

Claims

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Application Information

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IPC IPC(8): G01S11/02G01P3/00
CPCG01S11/026G01P3/00
Inventor 胡运成
Owner 胡运成
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