Train speed measuring system

Abstract

The invention discloses a train speed measuring system. The system is characterized in that a speed measuring device is arranged beside a track and comprises two pulse type laser distance measuring modules, namely a distance measuring module A and a distance measuring module B. The distance measuring module A and the distance measuring module B acquires distance information in real time and transmits data to a control module, wherein the data is recorded as a data packet A and a data packet B; and the control module records the distance data Li in the data packet A within a preset distance range and the distance data Si in the data packet B within the preset distance range, calculates the speed of a train in real time by utilizing the two groups of distance data on the basis of the installation deviation angle of the distance measuring modules, and judges whether the train runs normally or not. According to the method, non-contact measurement is adopted, and the speed of the train is accurately calculated according to the difference value of sampling signals and the distance information between the two groups of data.

Description

technical field [0001] The invention relates to the field of track speed measurement, in particular to a train speed measurement system. Background technique [0002] As one of the important modes of transportation and transportation, rail transit plays an indispensable role in life. The train safety guarantee system is an important link in the entire rail transit system. Whether the speed of the train meets the requirements has always attracted much attention. , Existing speed measurement methods include: 1, rotation measurement, which utilizes the rotation of the train runner to obtain the current vehicle speed, which is a contact measurement method, and is easy to cause measurement errors because of the idling and slipping of the train shaft; 2, GPS navigation speed measurement, which The position of the train is tracked in real time through satellite positioning, but it is easily affected by weather and terrain, causing satellite signal distortion, and it is difficult to...

AI Technical Summary

Problems solved by technology

[0002] As one of the important modes of transportation and transportation, rail transit plays an indispensable role in life. The train safety guarantee system is an important link in the entire rail transit system. Whether the speed of the train meets the requirements has always attracted much attention. , Existing speed measurement methods include: 1, rotation measurement, which utilizes the rotation of the train runner to obtain the current vehicle speed, which is a contact measurement method, and is easy to cause measurement errors because of the idling and slipping of the train shaft; 2, GPS navigation speed measurement, which The position of the train is tracked in real time through satellite positioning, but it is easily affected by weather and terrain, causing satellite signal distortion, and it is difficult to use it on a large scale; 3. Radar speed measurement, which obtains the running speed by measuring the Doppler frequency difference, but its demand is relatively high cost support, and relying on complex signal processing algorithms, requires more manpower and material support; at the same time, for high-speed trains, such as high-speed rail, its speed can reach 360km / h. Unable to meet high-speed measurement

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