Device and method for speed and distance measurement of train control vehicle-mounted equipment based on two-by-two-out-of-two architecture

Abstract

The invention discloses a speed-measuring and distance-measuring device and method for train control vehicle-mounted equipment based on a two-by-two-out-of-two architecture, which includes two speed-measuring and distance-measuring boards with the same structure, and each of the speed-measuring and distance-measuring boards includes two FPGAs and two MCUs , signal acquisition circuit, two FPGAs receive pulse signals at the same time, and complete self-inspection respectively; MCU obtains train running speed, direction, and pressure information based on FPGA output high-speed signal acquisition results; according to the information obtained in step A4, determine the two-out-of-two architecture for speed measurement and distance measurement The voting output signal of the vehicle; the output signal of the split empty vehicle equipment is determined based on the voting output signal of the two-by-two architecture speed measurement and distance measurement. The two MCUs vote synchronously to obtain information such as train running speed, train traveling distance, train running direction, train pipe pressure and wind pressure, etc., and transmit them to the on-board host. and precision requirements.

Description

technical field [0001] The present invention relates to the technical field of rail transit, and in particular to a speed-measuring and distance-measuring device and method for train control vehicle-mounted equipment based on a two-by-two architecture. Background technique [0002] The speed measurement and distance measurement device is one of the important components of the train control vehicle equipment. The existing speed measurement and distance measurement device usually has the function of detecting the train speed, running distance and running direction, and has the ability to deal with the speed measurement and distance measurement caused by idling and slipping within a certain range. error function. However, in the above-mentioned functions of the speed measuring distance measuring device, there are mainly the following deficiencies: [0003] (1) The speed measurement and distance measurement function is jointly completed by the speed measurement and distance mea...

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Problems solved by technology

[0004] (2) During the idling / sliding detection of the tested wheel set, the instantaneous distortion caused by external electromagnetic interference cannot be effectively overcome, causing idling / sliding misjudgment

[0005] (3) During the adaptation process of the new model, the speed measuring and ranging unit cannot effectively detect idling / sliding and calculate the correction speed, the error of the speed measuring and ranging unit is large, and the adaptability to the new model is poor

[0006] (4) The device has a single function, and can only complete the calculation of speed, distance, and direction, and the resource utilization rate is low

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