声学法砝码体积测量系统的研究

Study on Acoustic Volumeter System of Weights

利用声学原理，设计了一套声学法砝码体积测量系统，以满足高精度砝码体积的测量需求。实际测量实验中，通过系统对10～100g的砝码进行了体积测量，测量结果同液体静力法相比，相对误差低于8．3×10^-4；系统的相对扩展不确定度小于4．3×10^-4。

To meet the measurement demand of the volume of weights for high accuracy measuring weights, an acoustic volumeter system of weights is developed by using acoustic theory. A practical procedure of measuring the volume of weights ranging from 10 g to 100 g using an acoustic volumeter is proposed. The volumes obtained using an acoustic volumeter were compared with the results obtained by the hydrostatic, and the relative error lower than 8. 3×10^-4 is acquired. The relative expanded uncertainty of system is lower than 4. 3×10^-4.