介紹一種采用電渦流傳感器的無“滑差”測量鐵路機(jī)車速度與路程的方法. 在機(jī)車的車輪架前后設(shè)置兩個(gè)電渦流傳感器,獲得兩個(gè)反映鐵軌中非均質(zhì)特性的隨機(jī)信號. 利用它們的相關(guān)特性可以計(jì)算出機(jī)車的運(yùn)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(yàn)裝置與實(shí)測結(jié)果。電渦流傳感器組成的相關(guān)測試系統(tǒng),為進(jìn)一步提高測量精度提出了新的途徑.
關(guān)鍵詞:電渦流傳感器;相關(guān)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