针对现有技术中单扭杆转动惯量测量装置存在测量范围受限制的问题,提出了基于扭摆法的双扭杆转动惯量测量的新装置。采用双扭杆结构,通过可动插销的插入和拔出实现单双扭杆的切换,同时给出两种不同结构下的转动惯量测量范围的详细推导过程。结果表明转动惯量的测量范围明显地提高了,方便地解决了单扭杆存在的问题,从而验证了基于扭摆法的双扭杆转动惯量测量装置的有效性。 In order to solve the problem that the measuring range of single torsion bar moment of inertia is limited in the prior art, a new device for measuring the moment of inertia of double torsion bar is proposed. The double torsion bar structure is adopted to realize the switching between single and double torsion bars by inserting and pulling the movable latches. The detailed derivation process of the measurement range of moment of inertia under two different structures is also given. The results show that the measurement range of moment of inertia is obviously improved, and the problem of single torsion bar is solved conveniently. The validity of dual torsion bar moment of inertia measuring device based on torsion method is verified.