公开(公告)号：US4292850A

公开(公告)日：1981-10-06

申请号：US114614

申请日：1980-01-23

申请人： Christian Bachem

发明人： Christian Bachem

IPC分类号： G01L9/00 ,  G01L9/12

CPC分类号： G01L9/0016

摘要： An air pressure transmitter for measuring air pressure having a circular diaphragm arranged in a measuring chamber, said diaphragm being surrounded on both sides by thin air layers and limited by rigid walls. The body of the air layers influences the natural frequency of the diaphragm. In order to achieve a high accuracy of measurement and to exclude calibrating instabilities, the diaphragm is configured as a plate of hard beaten material and clamped at its edge between the rigid walls with distance rings of such a thickness that the restoring force of the air layers located within the distance rings, at atmospheric pressure will become approximately three to ten times as high as the restoring force of the diaphragm. The diaphragm itself is inductively excited.

摘要翻译： 一种空气压力变送器，用于测量具有设置在测量室中的圆形隔膜的空气压力，所述隔膜在两侧被薄空气层包围并被刚性壁限制。 空气层的主体影响隔膜的固有频率。 为了实现高精度的测量并且排除校准不稳定性，隔膜被构造成硬质材料的板，并且在其刚性壁之间的边缘处被夹紧，其中距离环的厚度为空气层的恢复力 位于距离环内，大气压力将变为膜片恢复力的约三到十倍。 光阑本身感应激发。