Development Of The EGS-1123 Rail 3D Fine Measurement Trolley For The Slab Track Construction Survey

April 18, 2007, China implemented the sixth railway speed increase large, and stridden in a quasi-high speed rail era. However, due to the passenger train and the freight train sharing a railway line, our country will end increase speed in the existing railway, but carry on the construction of high-speed PDL (Passenger Dedicated Lines), which makes the slab track and its detection devices have broad market in China.In view of the Bi-block slab track construction craft's request, the EGS-1123 rail 3D (three dimensions) fine measurement trolley adopted "relative surveys mode + the 3D survey fixed-point mode+ the 3D survey continuously mode" that is trinity's all-round measurement system architecture, improved the relative measurement function of the GJY series track inspection dolly, studied the 3D track coordinates automatic sizing method, proposed the Total Station compatibility of design pattern,caused that the technology of the track 3D fine measurement achieved the overseas advanced level.This paper described the rail 3D measurement system plan and the software and hardware system's design of the slave CPU for the rail 3D fine measurement trolley. In the same mileage interval sampling control module, photoelectric encoder used as bidirectional mileage pacer trigger source, through the method of initialization number, realize the partial correction or the continuous correction of sampling interval,The mileage measuring accuracy achieves 0.75‰.November 2007, China Railway Engineering Corporation organized the domestic authoritative expert to test and experiment the key construction machinery for Bi-block slab track which include the trolley. And these experts affirmed the EGS-1123 rail 3D fine measurement trolley. At present the dolly already official application in the Wenzhou-Fuzhou PDL, the Hefei-Wuhan PDL, and the Wuhan-Guangzhou PDL.