Fast Wheel Load Swept Force Detection System To Improve Signal Processing Research

To increase the capacity of transportation, freight trains tend to hoist the limit of their speed and load, which makes a high possibility of traffic accidents. Thence it is of great importance to adopt some according measures to reduce the appearance of this kind of bad situation by monitoring the phenomenon in terms of the detecting technology. Aiming at a further research about the dynamic observation of wheel-scan force signal, an ejection test platform was designed to investigate the rail base over-load signal's features under single wheel-rail condition and find the relevant factors which influence the value obtained.Taking the monitoring requirement of the test platform as the starting point, in this paper, a brief introduction about the design of the detecting system was made, related experiments were arranged and certain data processing of the sampled signal carrying on the signal features'gain and processing was done. Its main gist is as below:1. Considering the test platform as the study object and in the light of the requirement of the rail base monitoring system, a data acquisition system on the basis of CONTECT board was built to observe the wheel-scan force signals.2. According to the actual of the test platform, a reasonable experimental program was designed, the integration of the circuit of amplifying and filtering was accomplished, sensors'static marks were obtained and a series of experiments in different ejection speed and wheel height were arranged.3. The rail base signals received were extracted and processed with the application of Hilbert-Huang-transform. The relationship between speed and the value of the observed wheel-scan force signal have primarily verified the efficiency and superiority of this transform under this situation.