CAJ | 학술논문

利用RLC串联谐振电路可以高精度测量电感的原理,将其用于测量金属丝的杨氏模量.将磁棒固定在待测金属丝上,其一部分放在螺线管内部,并用自制的密绕长螺线管代替RLC串联谐振电路中的电感. 外力作用下金属丝的伸长会引起螺线管内磁棒的长度的变化,从而引起螺线管电感的改变. 因此可以通过测量螺线管的电感的变化实现金属丝细小伸长量的测量. 该方法简单易行,测量精确度高,具有一定的实用价值和良好的应用前景.
이용RLC천련해진전로가이고정도측량전감적원리,장기용우측량금속사적양씨모량.장자봉고정재대측금속사상,기일부분방재라선관내부,병용자제적밀요장라선관대체RLC천련해진전로중적전감. 외력작용하금속사적신장회인기라선관내자봉적장도적변화,종이인기라선관전감적개변. 인차가이통과측량라선관적전감적변화실현금속사세소신장량적측량. 해방법간단역행,측량정학도고,구유일정적실용개치화량호적응용전경.
We measure Yang′s modulus of metallic wire by RLC series resonance circuit for its higher precision in measurement of inductance. We replace inductance with a solenoid,in which center there is a mag-netic rod fixed on metallic wire being tested. In a continuous and uniform increasing force,the inductance of solenoid varied with the length change of the magnetic rod in solenoid. By measuring the inductance of RLC se-ries resonance circuit,we can precisely measure the mini-elongation of metallic wire. Theoretical analysis shows that this method not only possesses the advantages of simple and high precision but also realizes the electric measurement of non-electricity. It is practical and has good application prospect.