CASCO SIGNAL LTD.

The present disclosure provides a Beidou satellite-based initial train positioning calculation method, and a positioning system. The initial train positioning calculation method includes the following operations: S1: receiving Beidou satellite signals to obtain Beidou navigation data, and verifying the validity of the data; S2: obtaining a track electronic map file, and verifying the validity of the file; S3: based on the Beidou navigation data and the track electronic map file, screening out possible track sections of the current position of the train as candidate track sections, and putting the candidate track sections into a set TrackList; S4: determining whether the number of the candidate track sections in the TrackList is 1; and S5: according to the determination result, selecting to execute a single track position comparison algorithm or a non-single track position comparison algorithm.

Disclosed in the present invention are a positioning method capable of fusing a historical operation track and Beidou navigation, and an apparatus thereof. The method includes: receiving longitude and latitude information sent by a Beidou navigation system; determining validity of historical track information in combination with received longitude and latitude information and corresponding historical track information; when the historical track information is valid, searching an alternative section according to types of a terminal; traversing the alternative section, and converting longitude and latitude to section position information; according to the types of the terminal, determining whether converted section position information in the alternative section is valid; and when the converted section position information is valid, outputting the section position information. The present invention has the following advantages: according to the method, calculation is performed by fully utilizing the historical track information of the terminal, so that the calculation amount of a processor device is greatly reduced, and the compression rate can reach 98% or more; meanwhile, the CPU utilization rate is also increased; and a server with the same configuration can perform calculation tasks of larger stations, more stations and more terminals, so that the hardware input cost is saved.

The present disclosure provides a Beidou satellite-based initial train positioning calculation method, and a positioning system. The initial train positioning calculation method includes the following operations: S1: receiving Beidou satellite signals to obtain Beidou navigation data, and verifying the validity of the data; S2: obtaining a track electronic map file, and verifying the validity of the file; S3: based on the Beidou navigation data and the track electronic map file, screening out possible track sections of the current position of the train as candidate track sections, and putting the candidate track sections into a set TrackList; S4: determining whether the number of the candidate track sections in the TrackList is 1; and S5: according to the determination result, selecting to execute a single track position comparison algorithm or a non-single track position comparison algorithm.

A safe coding method for trackside train positioning information, including the following steps: compiling line position coding information of a train by using a redundancy coding scheme; identifying a coding string on a trackside signboard by an image collector, and sending the coding string to a vehicle-mounted safety computer after check; after performing multi-channel redundancy safe calculation on the coding string by the vehicle-mounted safety computer, looking up a table in a position database to obtain train position information corresponding to the coding string; and, updating a real position of the train according to the train position information determined by looking up the table. The method integrates redundancy, inverse check calculation and other means, thereby improving the safety of position calculation, remedying the reliability and safety defects of visual identification, and improving the positioning accuracy of passive train positioning based on a trackside device by an image collection technology.