公开(公告)号：EP0087612A3

公开(公告)日：1984-04-11

申请号：EP83101080

申请日：1983-02-04

申请人： The Foxboro Company

发明人： Petros, Kenneth W.

IPC分类号： G01L07/00 ,  G01L11/00

CPC分类号： G01L9/0014 ,  G01L9/0011 ,  G01L11/02

摘要： A vibratable element whose resonant frequency changes in accordance with an external source of variable applied pressure, has an inner cavity in fluid communication with the source of applied pressure, so that variations therein produce corresponding changes in the internal pressure of the cavity. Increases in this internal pressure cause the flexible walls surrounding the cavity to expand outwardly, thereby increasing the mechanical stiffness of the element. The increased stiffness produces a corresponding increase in the resonant frequency. Conversely, a decrease in pressure allows the walls to slacken and reduce the overall stiffness of the element. A linear relationship exists between changes in applied pressure and changes in the resonant frequency, over an appreciable range of pressures. An optical scheme detects the frequency, and conventional electronics correlate the frequency to the corresponding pressure, or to another physical variable represented by the applied pressure.

摘要翻译： 谐振频率根据可变施加压力的外部源变化的可振动元件具有与施加的压力源流体连通的内腔，使得其中的变化产生腔的内部压力的相应变化。 该内部压力的增加导致围绕空腔的柔性壁向外扩张，从而增加元件的机械刚度。 增加的刚度产生谐振频率的相应增加。 相反，压力的降低允许壁松弛并降低元件的总体刚度。 施加压力的变化和共振频率的变化之间存在线性关系，超过可观的压力范围。 光学方案检测频率，常规电子设备将频率与相应的压力相关联，或与由施加的压力表示的另一物理变量相关联。

公开(公告)号：EP0087612A2

公开(公告)日：1983-09-07

申请号：EP83101080.6

申请日：1983-02-04

申请人： THE FOXBORO COMPANY

发明人： Petros, Kenneth W.

IPC分类号： G01L7/00 ,  G01L11/00

CPC分类号： G01L9/0014 ,  G01L9/0011 ,  G01L11/02

摘要： A vibratable element whose resonant frequency changes in accordance with an external source of variable applied pressure, has an inner cavity in fluid communication with the source of applied pressure, so that variations therein produce corresponding changes in the internal pressure of the cavity. Increases in this internal pressure cause the flexible walls surrounding the cavity to expand outwardly, thereby increasing the mechanical stiffness of the element. The increased stiffness produces a corresponding increase in the resonant frequency. Conversely, a decrease in pressure allows the walls to slacken and reduce the overall stiffness of the element. A linear relationship exists between changes in applied pressure and changes in the resonant frequency, over an appreciable range of pressures. An optical scheme detects the frequency, and conventional electronics correlate the frequency to the corresponding pressure, or to another physical variable represented by the applied pressure.

摘要翻译： 谐振频率根据可变施加压力的外部源变化的可振动元件具有与施加的压力源流体连通的内腔，使得其中的变化产生腔的内部压力的相应变化。 该内部压力的增加导致围绕空腔的柔性壁向外扩张，从而增加元件的机械刚度。 增加的刚度产生谐振频率的相应增加。 相反，压力的降低允许壁松弛并降低元件的总体刚度。 施加压力的变化和共振频率的变化之间存在线性关系，超过可观的压力范围。 光学方案检测频率，常规电子设备将频率与相应的压力相关联，或与由施加的压力表示的另一物理变量相关联。