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A platform for research: civil engineering, architecture and urbanism
Track irregularity detection method and system based on four-point chord measuring method
The invention discloses a track irregularity detection method and system based on a four-point chord measuring method. The method includes the steps that four sensors located on one straight line are arranged on a vehicle body, and reflecting points of laser beams emitted by the four sensors on a track are set to be the point a, the point b, the point c and the point d; a connecting line ac between the point a and the point c serves as a first chord line, and a connecting line ad between the point a and the point d serves as a second chord line; the distance bo between the point b and the first chord line and the distance bo' between the point b and the second chord line are respectively calculated, and the difference between the bo and the bo' serves as a measuring value f of the four-point chord measuring method; the transfer function of the four-point chord measuring method is calculated according to the measuring value f, and the true value of the track irregularity is obtained in the mode that the measuring value f is corrected in a frequency domain through the transfer function. By means of the track irregularity detection method and system, the limitation of being limited to a three-point chord measuring method detection idea traditionally is broken through, the detection accuracy of the track irregularity is improved, and the track irregularity detection method and system are of great significance in controlling the high-speed railway regularity and detecting the irregularity of track surface short waves with small amplitudes.
Track irregularity detection method and system based on four-point chord measuring method
The invention discloses a track irregularity detection method and system based on a four-point chord measuring method. The method includes the steps that four sensors located on one straight line are arranged on a vehicle body, and reflecting points of laser beams emitted by the four sensors on a track are set to be the point a, the point b, the point c and the point d; a connecting line ac between the point a and the point c serves as a first chord line, and a connecting line ad between the point a and the point d serves as a second chord line; the distance bo between the point b and the first chord line and the distance bo' between the point b and the second chord line are respectively calculated, and the difference between the bo and the bo' serves as a measuring value f of the four-point chord measuring method; the transfer function of the four-point chord measuring method is calculated according to the measuring value f, and the true value of the track irregularity is obtained in the mode that the measuring value f is corrected in a frequency domain through the transfer function. By means of the track irregularity detection method and system, the limitation of being limited to a three-point chord measuring method detection idea traditionally is broken through, the detection accuracy of the track irregularity is improved, and the track irregularity detection method and system are of great significance in controlling the high-speed railway regularity and detecting the irregularity of track surface short waves with small amplitudes.
Track irregularity detection method and system based on four-point chord measuring method
XUE JILIAN (author) / JIA JINZHONG (author) / MENG XIANHONG (author) / GAO GUOLIANG (author) / XU XINLI (author) / TANG YONGKANG (author) / MAO XIAOJUN (author) / XU YUDE (author) / LI HAIFENG (author) / ZHOU YU (author)
2015-09-30
Patent
Electronic Resource
English
IPC:
E01B
PERMANENT WAY
,
Gleisoberbau