Dynamic acquiring device and method for track marks

The invention belongs to the field of railway tract detection and relates to a dynamic acquiring device and method for ballastless track marks CPs III of a high-speed railway. The acquiring device provided by the invention consists of a rail car, an encoder [1], a control trigger [2], a first high-performance industrial linear array camera [3], a second high-performance industrial linear array camera [4], a second laser illuminator [5], a first laser illuminator [6], a computer, a camera bracket [8] and a power source. The acquiring method provided by the invention comprises the following steps of: acquiring linear array images, carrying out coordinate transformation and calculating relative positions between the marks CPs III and the rail car. According to the invention, the relative positions between the CPs III and a track detecting device can be dynamically acquired, the working time for track detection is shortened, and the working efficiency is improved.