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    • 1. 发明公开
    • Pressure sensor with vibrating member
    • Drucksensor mit Schwingungselement
    • EP1808685A2
    • 2007-07-18
    • EP07105760.8
    • 2003-11-07
    • VARIAN S.p.A.
    • Maccarrone, CristianCorreale, RaffaeleBusso, Mario
    • G01L21/22
    • G01L9/0016G01L9/0019G01L21/22
    • The invention concerns a pressure sensor including: a micro-electromechanical vibrating device, comprising a silicon substrate (15') onto which a multilayer vibrating assembly (321) is formed; a control device (21') of said assembly in order to make it oscillate relative to said substrate at the resonance frequency or at another known frequency; and a detector for detecting the actual frequency and/or amplitude of said oscillation. Since said actual frequency and/or amplitude are affected by the conditions, in particular the pressure, of the external environment, the variations of said frequency and said amplitude with respect to the values set by said control device can be used to measure pressure variations in the surrounding environment.
    • 本发明涉及一种压力传感器,包括:微机电振动装置,其包括形成多层振动组件(321)的硅衬底(15'); 所述组件的控制装置(21'),以使其以共振频率或另一已知频率相对于所述衬底振荡; 以及用于检测所述振荡的实际频率和/或振幅的检测器。 由于所述实际频率和/或振幅受到外部环境的条件特别是压力的影响,因此所述频率和所述振幅相对于由所述控制装置设定的值的变化可用于测量压力变化 周边环境。
    • 2. 发明公开
    • Micromechanical pressure gauge having extended sensor range
    • 具有扩展范围的微机械压力传感器
    • EP0735354A1
    • 1996-10-02
    • EP96301794.2
    • 1996-03-15
    • VARIAN ASSOCIATES, INC.
    • Martin, Jacob H.Kelley, William P.
    • G01L21/22
    • G01L21/22G01L9/0019
    • An improved gas pressure gauge is disclosed that extends the linear range of pressure dependent damping to higher pressures by placing a stationary member (22) in very close proximity to the vibrating member (21). This range linear dependent damping is also extended to lower pressures by making the vibrating member (21) large in area relative to its small distance from a fixed planar member, which can also serve as its supporting member, by making it vibrate in a direction perpendicular to the fixed planar member, and by making the springs that support the vibrating member from a high Q and conductive material, such as boron doped single crystal silicon. These features for extending the range to higher and lower pressures can be built separately into two independent vibrating elements that can be used individually or in tandem, or they can be built into a single vibrating element that can be made to vibrate in two modes, one parallel and one perpendicular to a fixed member. The preferred method of measuring gas pressure with these gauges is to determine the drive voltage necessary to drive the mechanical oscillator to a fixed amplitude against the pressure dependent damping of the gas that is being measured.