公开(公告)号：US07694571B2

公开(公告)日：2010-04-13

申请号：US11794679

申请日：2005-12-23

申请人： Wolfgang Scholz ,  Armin Gasch ,  Raiko Milanovic ,  Peter Reigler

发明人： Wolfgang Scholz ,  Armin Gasch ,  Raiko Milanovic ,  Peter Reigler

IPC分类号： G01L11/00

CPC分类号： G01L19/0092 ,  G01L19/0645 ,  G01L19/0672 ,  G01M3/24

摘要： The invention relates to a pressure sensor, the measuring cell of which is provided with at least one membrane for the protection of the pressure-sensitive element and a measuring chamber, filled with pressure medium, in which the pressure-sensitive element is housed. According to the invention, the membrane is monitored for damage, whereby at least one surface wave sensor is arranged in the chamber filled with pressure medium. On damage to the membrane occurring, process medium is mixed with the pressure medium. A substance change in the sensitive region of the surface wave sensor is thus brought about which results in a differing signal run time. Any change in run time is an indictor of damage to the pressure sensor and may be signaled as such.

摘要翻译： 本发明涉及一种压力传感器，其测量单元设置有用于保护压敏元件的至少一个膜和填充有压力介质的测量室，其中容纳压敏元件。 根据本发明，监测膜的损伤，由此在填充有压力介质的室中布置至少一个表面波传感器。 在发生膜的损坏时，将处理介质与压力介质混合。 因此，表面波传感器的敏感区域中的物质变化导致不同的信号运行时间。 运行时间的任何变化都是对压力传感器造成损害的指示器，并且可以这样发出信号。