介紹一種采用電渦流傳感器的無“滑差”測量鐵路機車速度與路程的方法. 在機車的車輪架前后設置兩個電渦流傳感器,獲得兩個反映鐵軌中非均質(zhì)特性的隨機信號. 利用它們的相關特性可以計算出機車的運行速度與行駛過的路程. 文中說明了傳感器與信號處理的原理,并且介紹了模擬試驗裝置與實測結(jié)果。電渦流傳感器組成的相關測試系統(tǒng),為進一步提高測量精度提出了新的途徑.
關鍵詞:電渦流傳感器;相關測量;速度
Abstract :In order to solve the“slip-error”of wheel tachometer the paper present s a new method of noncontact measurement of rail speed by eddy current sensors. Two eddy current sensors , which are mounted on bogie f rame of the vehicle , can detect stochastic inhomogeneity in region of the rail. From two signals the vehicle speed and distance of t ravel are gained by means of a digital t ransit- time correlator. The princi2 ple of signal processing of eddy current sensors and a simulate test device are illust rated. The experimentalresearch has obtained satisfactory result . Therefore it is a new way to raise measurement accuracy of speed.
Key words :eddy current sensor ; correlation measurement ; speed