一、引言在计量学上,物体质量的精密测定一般是通过标准砝码与待测物体间质量差值的测量来完成的。常用机械杠杆秤或天平进行质量差值的测量。最近几年来,Gilmore Industries 公司制造出另一种类型的质量比较仪,它是根据对粘贴应变片的力传感器进行近似恒定的加荷而工作的。基本原理是在卸荷过程中保持力传感器的负荷近似恒定。该原理是通过活塞缸体产生 I. INTRODUCTION In metrology, the precise measurement of the mass of an object is usually done by measuring the mass difference between a standard weight and the object under test. Common mechanical lever scale or balance for measuring the quality of the difference. In recent years, Gilmore Industries has produced another type of mass comparator that works based on an approximately constant load on a force sensor that bonds strain gauges. The basic principle is to maintain the force sensor load approximately constant during unloading. The principle is generated by the piston cylinder