論述了一種高精度旋轉(zhuǎn)葉片振動(dòng)參數(shù)葉尖定時(shí)檢測(cè)方法。設(shè)計(jì)一套葉尖定時(shí)傳感系統(tǒng); 利用葉尖經(jīng)過(guò)非接觸測(cè)頭的時(shí)間進(jìn)行測(cè)量, 與傳統(tǒng)接觸測(cè)量方法相比, 具有實(shí)時(shí)性強(qiáng)、精度高、適用于高轉(zhuǎn)速等優(yōu)點(diǎn)。通過(guò)多個(gè)葉尖定時(shí)傳感器實(shí)現(xiàn)對(duì)葉片振動(dòng)的實(shí)時(shí)、全面監(jiān)測(cè); 利用葉根同步傳感器減小了由于轉(zhuǎn)速不穩(wěn)定造成誤差的影響。論述了系統(tǒng)原理和葉尖定時(shí)信號(hào)的處理方法, 并做出了討論。
關(guān)鍵詞　振動(dòng)測(cè)量　非接觸測(cè)量　葉尖定時(shí)　傳感器　信號(hào)處理
Abstract　A h igh accuracymethod using t ip2t im ing fo r test ing vibrat ion parameters of ro to r blade is described1A t ip2t im ing senso r system is devised1The method uses the t ime at wh ich the blade t ip s pass the p robes to monito r the blade vibrat ion1Compared w ith the t radit ionalmeasuring methods, the new method has the advantages of re2 al2t ime, h igh p recision and suitable fo r h igh ro to r speed1The real2t ime and comp lete detect ion to the blades is re2 alized by means of several t ip2t im ing senso rs1The blade bo t tom senso rs are used fo r elim inat ing erro rs caused by the instability of ro to r velocity1The theo ry of the system and the p rocessing method of t ip2t im ing signals are de2 scribed, and the discussion is p resented1
Key words　V ibrat ion measurement　Non2contact ing measurement　T ip2t im ing　Senso r　Signal p rocessing