The invention discloses an online detection method for the diameters of wheels of an urban rail vehicle based on laser displacement sensors. The online detection method comprises the following steps: sequentially arranging a first laser displacement sensor, a second laser displacement sensor and a third laser displacement sensor on the inner side of a rail along the movement direction of a vehicle; setting a fourth laser displacement sensor on the outer side of the rail to be symmetrical to the third laser displacement sensor; carrying out coordinate conversion on detection point coordinates obtained by simultaneously detecting the wheels by the four laser displacement sensors; fusing the detection data, subjected to the coordinate conversion, of the third laser displacement sensor and the fourth laser displacement sensor on the same coordinate system to obtain a complete tread contour line; extracting a right end face of a tread according to the data subjected to the coordinate conversion and determining a transverse coordinate of the right end face of the tread; and after carrying out segmentation fitting on a tread curve, extracting tread standard point coordinates measured by the first laser displacement sensor, the second laser displacement sensor and the third laser displacement sensor respectively according to the transverse coordinate value of the right end face of the tread and obtaining the diameters of the wheels. According to the online detection method, structure arrangement is convenient, a system is stable and a measurement principle is simple; and high-precision online non-contact type measurement can be carried out.


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    Title :

    Online detection method for diameters of wheels of urban rail vehicle based on laser displacement sensors


    Contributors:
    XING ZONGYI (author) / CHEN SHUANG (author) / WANG LU (author) / WANG GUI (author) / YAO XIAOWEN (author)

    Publication date :

    2016-01-13


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B61K Andere Hilfseinrichtungen für Eisenbahnen , OTHER AUXILIARY EQUIPMENT FOR RAILWAYS



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