Middle-low speed magnetically levitated train combination speed measurement positioning device

The invention discloses a middle-low speed magnetically levitated train combination speed measurement positioning device. The device comprises two sets of eddy current type PNP sensors arranged at the bottom of a train, a Doppler speed measurement radar and a speed measurement positioning board (comprising an onboard MEMS digital accelerometer). The eddy current type PNP sensors are used for monitoring a metal sleeper between rails in a non-contact non-abrasion mode. The speed measurement positioning board is used for calculating the speed of the train according to the time difference of the eddy current type PNP sensors enters the same sleeper area, calculating the running speed of the train according to the train accelerated speed measured by the MEMS digital accelerometer, calculating the train running displacement within a period of time according to the running speed of the train, and determining the position of the train after receiving a message, containing the position information of the train, sent by a transponder.