基于CBI站场叠加预发电码化技术研究OA

This paper studies and designs a scheme for the pre-overlap coding circuit based on CBI stations and yards,targeting at the issues of premature code transmission and limited applicability to EMU(Electric Multiple Unit)in the main-line coding equipment at railway stations and yards of conventional lines equipped with computer based interlocking(CBI)together with relay coding equipment and superimposed coding equipment(with ZPW-2000 series taken as an example).This scheme improves the code sending box arrangement to address the premature code transmission problem,and enhances the circuit design of transfer relay(CJ)to achieve the pre-overlap coding function.Additionally,it uses the 25.7 Hz(SP code)low-frequency information to enable the carrier frequency switching function,which not only reduces the driver's manual interventions and enhances the track circuit's anti-interference capability,but also address the train braking problem triggered by data mismatch between onboard and wayside equipment for EMUs operating at stations and yards.Through a systematic analysis of key parameters such as the de-energization time of track circuit relay(GJ)and the time delay between signal recognition and reception by the onboard equipment,the reasonable code sending time for SP code is determined.In view of the logical driving capability of CBI,and the configurations and driving logics of relays such as ZCJ,CJ,ZPJ and FGPJ are optimized,to enable the pre-overlap coding function on siding tracks and main-line routes.