公开(公告)号：US06236322B1

公开(公告)日：2001-05-22

申请号：US09388299

申请日：1999-09-01

申请人： Sergej Lopatin ,  Helmut Pfeiffer ,  Alexander Müller ,  Volker Dreyer ,  Wolfgang Brutschin

发明人： Sergej Lopatin ,  Helmut Pfeiffer ,  Alexander Müller ,  Volker Dreyer ,  Wolfgang Brutschin

IPC分类号： G08B2100

CPC分类号： G01F23/2967

摘要： An apparatus for establishing and/or monitoring a predetermined filling level in a container is described, which apparatus can be used in a wide range of applications, that is to say in many different media, which apparatus comprises: a housing (1), an oscillating element for projecting into the container, a diaphragm (5), which is fixedly clamped into the housing (1) at its edge and to which the oscillating element is fastened, and an electromechanical transducer for exciting the diaphragm (5) to produce oscillations in dependence on a transmission signal (S) present at the transducer and for receiving and converting oscillations thereof into an electrical reception signal (E), in which a percentage interval between a resonant frequency fr and an antiresonant frequency far divided by the resonant frequency fr exceeds 20% when the oscillating element oscillates in air.

摘要翻译： 描述了用于建立和/或监视容器中的预定填充水平的装置，哪种装置可以在广泛的应用中使用，也就是说在许多不同的介质中，哪种装置包括：壳体（1）， 用于突出到容器中的振动元件，在其边缘处固定地夹紧到壳体（1）中并且振动元件被紧固的隔膜（5）和用于激励隔膜（5）以产生振荡的机电换能器 依赖于存在于换能器处的传输信号（S）并且用于接收和转换其振荡为电接收信号（E），其中谐振频率fr与远谐振频率fr之间的反谐振频率之间的百分比间隔 当振荡元件在空气中振荡时超过20％。

公开(公告)号：US5844491A

公开(公告)日：1998-12-01

申请号：US59139

申请日：1998-04-13

申请人： Igor Getman ,  Sergej Lopatin

发明人： Igor Getman ,  Sergej Lopatin

IPC分类号： G01F23/296 ,  G08B21/00

CPC分类号： G01F23/2967

摘要： An apparatus for establishing and/or monitoring a predetermined filling level in a container is provided, in which a reception signal (E) is equal to the measurement signal, and in which a fixed phase difference (.DELTA..phi..sub.R), which is independent of the oscillation quality of the apparatus, exists between a first transmission signal (S.sub.1), and a reception signal (E) at a resonant frequency (f.sub.r). The apparatus comprises a mechanical oscillatory structure (1) and a piezoelectric element (2), which has a first region (I) having a reception electrode (21), a second region (II) having a first transmission electrode (22) and a third region (III) having a second transmission electrode (23), the two transmission electrodes (22, 23) having an identical form and being arranged symmetrically with respect to one another and to the reception electrode (21), in the first and in the second region (I, II), the piezoelectric element having a polarization which is in the opposite direction to a polarization of the third region (III), and a first transmission signal (S.sub.1) being applied to the first transmission electrode (22), which first transmission signal has the same amplitude as and is in antiphase with a second transmission signal (S.sub.2), which is applied to the second transmission electrode (23).

摘要翻译： 提供了一种用于建立和/或监视容器中的预定填充水平的装置，其中接收信号（E）等于测量信号，其中固定相位差（DELTA phi R）独立于 设备的振荡质量存在于第一传输信号（S1）和谐振频率（fr）的接收信号（E）之间。 该设备包括机械振荡结构（1）和压电元件（2），其具有具有接收电极（21）的第一区域（I），具有第一传输电极（22）的第二区域（II）和 具有第二透射电极（23）的第三区域（III），两个发射电极（22,23）具有相同的形状并相对于彼此对称地布置到接收电极（21），在第一和第二区域 所述第二区域（I，II），所述压电元件具有与所述第三区域（III）的偏振方向相反的方向的偏振光，以及施加到所述第一透射电极（22）的第一透射信号（S1） 该第一发送信号具有与施加到第二发送电极（23）的第二发送信号（S2）相同的振幅和相位的相位。

公开(公告)号：US5836192A

公开(公告)日：1998-11-17

申请号：US733099

申请日：1996-10-16

申请人： Igor Getman ,  Sergej Lopatin ,  Roland Muller

发明人： Igor Getman ,  Sergej Lopatin ,  Roland Muller

IPC分类号： G01F23/28 ,  B06B1/06 ,  G01F23/296

CPC分类号： G01F23/2968 ,  B06B1/06 ,  G01F23/2965 ,  Y10S367/908

摘要： For monitoring a predetermined level of a liquid in a container an ultrasonic transducer is fitted on the outer surface of the container wall at a measurement point situated at the height of the level to be monitored. The ultrasonic transducer contains a piezoelectric element which generates, when excited by an alternating voltage pulse having a given transmission frequency, an ultrasonic transmission pulse which is transferred via a diaphragm to the container wall and which converts ultrasonic vibrations transferred from the container wall to the ultrasonic transducer into electrical reception signals. So that the piezoelectric element for given dimensions can be operated in a large frequency range, and so that a good adaptation to the diaphragm is achieved, the piezoelectric element consists of a porous piezoelectric ceramic having a type 3--3 connectivity.

摘要翻译： 为了监测容器中液体的预定水平，超声换能器在位于待监测水平高度的测量点处装配在容器壁的外表面上。 超声波换能器包含一个压电元件，当被具有给定透射频率的交流电压脉冲激发时，产生一个超声波发射脉冲，该超声波发射脉冲通过隔膜传送到容器壁上，并将从容器壁传递的超声振动转换成超声波 传感器转换为电接收信号。 因此，用于给定尺寸的压电元件可以在大的频率范围内操作，并且实现了对膜片的良好适应性，压电元件由具有3-3型连接性的多孔压电陶瓷组成。

公开(公告)号：US5730025A

公开(公告)日：1998-03-24

申请号：US730944

申请日：1996-10-16

申请人： Igor Getman ,  Sergej Lopatin ,  Roland Muller

发明人： Igor Getman ,  Sergej Lopatin ,  Roland Muller

IPC分类号： G01F23/28 ,  G01F23/296 ,  G01F1/72

CPC分类号： G01F23/2968 ,  G01F23/2965 ,  Y10S367/908

摘要： For monitoring a predetermined level of a liquid in a container an ultrasonic transducer is fitted on the outer surface of the container wall at a measurement point situated at the height of the level to be monitored. The ultrasonic transducer contains a piezoelectric element which generates, when excited by an alternating voltage pulse having a given transmission frequency, an ultrasonic transmission pulse which is transferred via a diaphragm to the container wall and which converts ultrasonic vibrations transferred from the container wall to the ultrasonic transducer into electrical reception signals. The diaphragm comprises on the side facing the container wall protuberances which adjoin the container wall. Between the diaphragm and the container wall a coupling layer is arranged, the thickness of which is determined by the height of the protuberances. As a result of this the formation of a layer of air between the diaphragm and the container wall is prevented and a jump in impedance avoided so that a good acoustical coupling exists between the diapragm and the container wall.

摘要翻译： 为了监测容器中液体的预定水平，超声换能器在位于待监测水平高度的测量点处装配在容器壁的外表面上。 超声波换能器包含一个压电元件，当被具有给定透射频率的交流电压脉冲激发时，产生一个超声波发射脉冲，该超声波发射脉冲通过隔膜传送到容器壁上，并将从容器壁传递的超声振动转换成超声波 传感器转换为电接收信号。 隔膜包括在与容器壁相邻的容器壁突起的一侧上。 在隔膜和容器壁之间布置有耦合层，其厚度由突起的高度决定。 因此，防止在隔膜和容器壁之间形成空气层，避免了阻抗的跳跃，从而在二极管和容器壁之间存在良好的声耦合。