laser heterodyne measurement 中文意思是什麼
laser heterodyne measurement
解釋
激光外差測量- laser : n 鐳射激光，受激發射光，激光；萊塞；激光器，光激射器 （ ＝ light amplification by stimulated emis...
- heterodyne : n. 【無線電】外差法，【無線電】外差法的，成拍的。vt. ,vi. （使）成拍，（使）致差，（使…）混合。
- measurement : n. 1. 測量，計量，量度。2. 份量，尺寸，大小，寬度，厚度，深度（等）。3. 測量法。 measurement goods （按體積、容積計算的）體積貨物。
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The scheme is designed based on these researches. for traditional laser rang finders, most of them use heterodyne method as the phase shift measurement. the advantage of heterodyne method is the high measurement accuracy, but its disadvantage is the low measurement velocity
傳統的相位激光測距大部分都採用差頻數字測相，差頻測相的優點在於由於頻率的降低，這樣必然意味著測距精度的提高，但其缺點是測距速率低。 -
The theory of the optical heterodyne measurement system is expounded and the principle and merit of ultrasound pulse generated by a laser pulse are analyzed
對光外差系統的測量原理進行了說明，分析了由激光脈沖激勵超聲的原理和優點。 -
The testing principle of the system is explained and the two components of the system including the optical heterodyne measurement system and the system of ultrasound pulse generated by a laser pulse are introduced
課題採用一種結構簡單、易調試的光外差超聲無損探傷系統，對其探傷機理進行了說明，介紹了組成系統的兩部分:光外差測量系統和激光脈沖激勵超聲部分。
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