System and method for real-time detection of subway wheel diameter using laser beam detector

Abstract

The invention discloses a subway wheel diameter real-time detection system and method by using laser emission detectors. The subway wheel diameter real-time detection system includes a ground device and a vehicle-mounted device. Two transponders are selected, wherein a distance between the two transponders is L in a straight road; expansion laser emission detectors of the ground device are arranged on Delta L positions outside sections of the transponders; a detected reference length of an L+2 Delta L wheel diameter can be acquired on the basis of a laser baffle plate of the vehicle-mounted plate, and the foundation of the wheel diameter detection precision is established; a time chip is embedded in the vehicle-mounted device; the measurement unit of a wheel shaft speed sensor is accurate to non-integer round, and the wheel diameter detection precision is improved further; the wheel diameter detection system is independent on a CBTC, can only receive a CBTC signal but not send the CBTC signal, and can eliminate interference in the CBTC; fault diagnosis of the subway wheel diameter detection system can be achieved by means of redundancy information of the expansion laser emission detectors and the transponders; fault diagnosis of the subway wheel diameter wear rate can be achieved on the basis of wear rate statistical data; and fault diagnosis can improve the running quality of the subway.

Description

technical field [0001] The invention belongs to the detection technology category of subway wheel diameters; in particular, it refers to a real-time detection system and method for subway wheel diameters using laser beam detectors and statistical data of wheel diameter wear rates. Background technique [0002] On December 3, 2014, AutoNavi released the "Traffic Analysis Report of China's Major Cities in the Third Quarter of 2014". The report gave a ranking list of urban congestion: Beijing ranked No. 1 and Hangzhou No. 2. On April 5, 2015, the famous navigation service provider TomTom released the TOP 30 congested cities in the world, and Hangzhou was honored to be listed. With the development of the economy and the progress of the society, the number of motor vehicles continues to increase and the roads are congested. In March 2013, the number of motor vehicles in the main urban area of ​​Hangzhou exceeded 1 million; an average of 3 people own one, and the per capita priva...

AI Technical Summary

Problems solved by technology

[0014] The above-mentioned beneficial exploration, the first patent proposes to use two adjacent transponders as the reference distance for wheel diameter correction, and obtain the running distance through the speed measurement of the wheel shaft speed sensor; use the difference between the reference distance and the running distance to obtain the update value of the wheel diameter; but query --The positioning accuracy of the transponder at 50cm level is not good, that is, the accuracy of the reference distance is low, so the accuracy of wheel diameter correction is not high

The second patent proposes a wheel diameter calibration system and method based on satellite positioning, and the wheel diameter is calibrated through positioning signals provided by satellites; because subway lines are often built underground and cannot receive satellite signals, and the accuracy of satellite positioning at the 10m level is not satisfactory, the wheel The accuracy of diameter calibration is not high and the validity of the method is questionable

The third patent proposes that the counter of the pulse distance measuring device and the speedometer counter count the pulses of the pulse distance measuring device and the pulse of the speedometer respectively, and obtain the wheel diameter of the train according to the difference between the two and the cumulative traveling distance of the train; considering the distance measuring device The counter and the speedometer counter have their own errors, so the accuracy of the train wheel diameter obtained is not high

The three patents still have the disadvantage of a single function. In addition to correcting the wheel diameter, real-time and accurate detection of the wheel diameter, if it can be compared with the statistical data of the wear rate, it will help the fault diagnosis and prediction of the train wheel, and the safe operation and maintenance of the train.

The exploration of relevant intellectual property achievements has reference value, but the achievements still have limitations

Images