公开(公告)号：WO1985005185A1

公开(公告)日：1985-11-21

申请号：PCT/US1985000594

申请日：1985-04-05

Applicant: ROSEMOUNT INC.

Inventor： ROSEMOUNT INC. ,  KOOSMANN, Mark, R.

IPC: G01N29/00

CPC classification number: G01N29/12 ,  B64D15/20 ,  G01N2291/0251 ,  G01W1/00

Abstract: An ice detector of the vibrating element type comprises a tube (32) that vibrates along its longitudinal axis, and is driven by an excitation coil (20) at the natural frequency of the tube (32) is sealed by a diaphragm (35) which has a surface exposed to an air stream in which icing is to be sensed. The exposed diaphragm surface is deflectable during vibration of the tube (32) at a flexible support portion (38) of the diaphragm (35). As ice accumulates on the exposed surface of the flexible support (38) the spring rate or flexibility support (38) changes, thereby changing the natural frequency of the vibration of the tube section (32). The changes in the natural frequency are sensed to determine that ice is accumulating. The diaphragm (35) is of low mass, and small so that stiffness of small amounts of ice significantly changes the spring constant of the flexible support (38) and the diaphragm (35) is shaped to conform to adjacent aerodynamic surfaces (11).

公开(公告)号：EP0182807B1

公开(公告)日：1989-06-14

申请号：EP85902228.7

申请日：1985-04-05

Applicant: ROSEMOUNT INC.

Inventor： KOOSMANN, Mark, R.

IPC: G01N29/00

CPC classification number: G01N29/12 ,  B64D15/20 ,  G01N2291/0251 ,  G01W1/00

Abstract: An ice detector of the vibrating element type comprises a tube (32) that vibrates along its longitudinal axis, and is driven by an excitation coil (20) at the natural frequency of the tube (32) is sealed by a diaphragm (35) which has a surface exposed to an air stream in which icing is to be sensed. The exposed diaphragm surface is deflectable during vibration of the tube (32) at a flexible support portion (38) of the diaphragm (35). As ice accumulates on the exposed surface of the flexible support (38) the spring rate or flexibility support (38) changes, thereby changing the natural frequency of the vibration of the tube section (32). The changes in the natural frequency are sensed to determine that ice is accumulating. The diaphragm (35) is of low mass, and small so that stiffness of small amounts of ice significantly changes the spring constant of the flexible support (38) and the diaphragm (35) is shaped to conform to adjacent aerodynamic surfaces (11).

公开(公告)号：EP0182807A1

公开(公告)日：1986-06-04

申请号：EP85902228.0

申请日：1985-04-05

Applicant: ROSEMOUNT INC.

Inventor： KOOSMANN, Mark, R.

IPC: G01N29 ,  B64D15 ,  G01N5 ,  G01W1

CPC classification number: G01N29/12 ,  B64D15/20 ,  G01N2291/0251 ,  G01W1/00

Abstract: Un détecteur de glace du type à élément vibratoire comprend un tube (32) qui vibre le long de son axe longitudinal, et qui est activé par une bobine d'excitation (20) à la fréquence naturelle du tube (32). Le détecteur de glace est scellé par un diaphragme (35) qui a une surface exposée à un courant d'air où la formation de glace doit être détectée. La surface du diaphragme peut être inclinée autour d'une partie flexible de support (38) du diaphragme (35) pendant que le tube (32) vibre. A mesure que la glace s'accumule sur la surface exposée du support flexible (38) le taux d'élasticité ou la flexibilité du support flexible (38) change, en changeant ainsi la fréquence naturelle de vibration de la section tubulaire (32). Les changements dans la fréquence naturelle sont détectés afin de déterminer l'accumulation de glace. Le diaphragme (35) a une masse peu élevée, et une taille si petite que la rigidité de petites quantités de glace modifie de façon significative la constante d'élasticité du support flexible (38). Le diaphragme (35) est façonné de façon à se conformer à des surfaces aérodynamiques adjacentes.

Abstract translation: 振动元件型冰探测器包括管（32），该管沿其纵向轴线振动并且由管（32）的固有频率由励磁线圈（20）激活。 冰检测器由隔膜（35）密封，隔膜（35）的表面暴露于要检测冰形成的空气流。 当管（32）振动时，隔膜表面可以围绕隔膜（35）的柔性支撑部分（38）倾斜。 由于冰柔性支撑件（38）的弹簧率或柔性支撑的柔韧性的暴露表面上积聚（38）的变化，从而改变所述管状部（32）的振动的固有频率。 检测固有频率的变化以确定积冰。 隔膜（35）具有较小的质量，其尺寸如此之小以至于少量冰的硬度会显着改变柔性支撑件（38）的弹性。 隔膜（35）成形为符合相邻的空气动力学表面。