Rail vehicle ground positioning speed-measuring system

The invention discloses a ground positioning velocity-measuring system for a railbound vehicle, comprising a tooth space plate arranged on the railbound vehicle, a plurality of zoning detectors arranged on the railbound vehicle, an upper processer and at least one middle processer arranged between the zoning detectors and the upper processer, wherein, the middle processer is connected with the plurality of zoning detectors and the upper processer and is used for grouping the plurality of zoning detectors and realizing the module management; the assembling spaces among the plurality of zoning detectors are arranged at will, at least two zoning detectors detect the tooth space plate simultaneously, thereby guaranteeing the normal operation of the system under the circumstance that a part ofthe device is damaged. The information detected by the zoning detectors is transmitted to the middle processer, and the effective information after processed is transmitted to the upper processer forprocessing the practical n