公开(公告)号：US3813934A

公开(公告)日：1974-06-04

申请号：US33723073

申请日：1973-02-28

Applicant: UNITED AIRCRAFT CORP

Inventor： MEYER R

IPC: G01L1/10

CPC classification number: G01L1/10 ,  Y10S73/01

Abstract: A vibrating cylinder, which is electronically driven by a feedback amplifier in response to electromagnetic signals representing the vibrations thereof, is completely surrounded by vacuum and is axially loaded, in tension or compression, whereby the natural frequency thereof varies as a function of the force of axial loading. The loaded end of the cell is sealed to vacuum by a diaphragm. The loading means is connected to a diaphragm of equal area, atmospheric pressure against which loads the cell in a direction oppositely to the first diaphragm, whereby axial loading is equally independent of pressure and density effects. Thermostatic heating obviates temperature variations. A tension embodiment includes a hoop for loading the cylinder, and a compression embodiment comprises a beam-type suspended-pan scale.

Abstract translation: 响应于表示其振动的电磁信号由反馈放大器电子驱动的振动圆筒被真空完全包围并且被拉伸或压缩地轴向加载，由此其固有频率随着 轴向载荷。 电池的负载端通过隔膜被密封到真空。 装载装置连接到相同面积的大气压力的膜片上，该膜片在与第一隔膜相反的方向上加载电池，由此轴向载荷与压力和密度效应相同。 恒温加热消除温度变化。 张力实施例包括用于装载气缸的环，并且压缩实施例包括梁型悬浮盘秤。