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    • 71. 发明申请
    • Zero Crossing Detection Of An Ultrasonic Signal With Variable Threshold Value
    • 具有可变阈值的超声信号的过零检测
    • US20080190213A1
    • 2008-08-14
    • US10585049
    • 2005-01-26
    • Tobias Lang
    • Tobias Lang
    • G01F1/66
    • G01F1/667G01F1/66G01P5/245
    • An ultrasonic flow sensor having at least one ultrasonic converter (A, B) for transmitting and receiving ultrasonic signals (A0, B0) and a receiver unit (4) that is connected to the ultrasonic converter (A, B) and determines a zero crossing (N) of the ultrasonic signal (A0, B0) as a reception time (t0) once the ultrasonic signal (A0, B0) has exceeded a predetermined threshold value (SW). The measurement precision can be significantly improved if the receiver unit (4) determines a piece of information about an amplitude (Amp) of the ultrasonic signal (A0, B0) and varies the threshold value (SW) based on the information determined.
    • 一种超声波流量传感器,具有至少一个超声波变换器(A,B),用于发送和接收超声波信号(A 0,B 0)和连接到超声波转换器(A,B)的接收器单元(4),并确定 一旦超声波信号(A 0,B 0)超过预定阈值(SW),超声波信号(A 0,B 0)的过零点(N)作为接收时间(t0> 0) )。 如果接收器单元(4)基于所确定的信息来确定关于超声信号(A 0,B 0)的振幅(Amp)的信息并且改变阈值(SW),则可以显着地提高测量精度。
    • 74. 发明申请
    • Determination of a reception time of an ultrasonic signal by means of pulse shape detection
    • 通过脉冲形状检测确定超声波信号的接收时间
    • US20070186680A1
    • 2007-08-16
    • US10591897
    • 2005-04-21
    • Tobias Lang
    • Tobias Lang
    • G01F1/66
    • G01F1/66
    • The present invention relates to an ultrasonic flow sensor equipped with at least one ultrasonic transducer (A, B) for transmitting and receiving ultrasonic signals (A0, B0) and one receiver unit (4) that is connected to the ultrasonic transducer (A, B) and detects a zero crossing (N) of the ultrasonic signal (A0, B0) as a reception time after the ultrasonic signal (A0, B0) has exceeded a predetermined threshold (SW). The measurement precision of the sensor can be significantly improved if the receiver unit (4) determines the time of a value characteristic of the ultrasonic signal (A0, B0) and determines the relative time shift (deltat) of the characteristic value (Ampmax, Ts) in relation to the zero crossing (N0, N1) that is detected as the reception time (t0).
    • 超声波流量传感器技术领域本发明涉及一种超声波流量传感器,其配备有至少一个超声波换能器(A,B),用于发送和接收超声波信号(A 0,B 0)和一个接收器单元(4),所述超声波换能器 ,B),并检测超声信号(A 0,B 0)的过零点(N)为超声波信号(A 0,B 0)超过预定阈值(SW)之后的接收时间。 如果接收器单元(4)确定超声波信号(A 0,B 0)的值特性的时间并且确定特征值(Amp)的相对时移(deltat),则可以显着改善传感器的测量精度 相对于被检测为零交叉的过零点(N SUB,N 1,N 1),其被检测为 接收时间(t 0)。
    • 77. 发明申请
    • Ultrasonic flow meter including guide elements
    • 超声波流量计包括导向元件
    • US20060156828A1
    • 2006-07-20
    • US11304181
    • 2005-12-14
    • Uwe KonzelmannTobias LangChristoph GmelinSami Radwan
    • Uwe KonzelmannTobias LangChristoph GmelinSami Radwan
    • G01F1/66
    • G01F5/00G01F1/662G01F1/667
    • The measurement of volume flows or mass flows in the intake system of motor vehicle internal combustion engines plays a significant role in reducing pollutant emissions. Therefore, an ultrasonic flow meter for measuring a flow rate of a fluid flowing in a primary flow direction is described. The ultrasonic flow meter has at least two ultrasonic transducers, the ultrasonic transducers being capable of emitting and/or receiving ultrasonic waves at an angle α to the primary flow direction which is different from 90°. Furthermore, the ultrasonic flow meter has at least one guide element which is entirely or partially situated in the fluid. This guide element diverts at least one part of the flowing fluid in such a way that in the diversion, a velocity component is transferred to at least one part of the flowing fluid perpendicular to the primary flow direction. Guide vanes or displacers in particular are described as guide elements. In addition, turbulators may be provided on the guide elements, the turbulators generating a longitudinal fluid bed along the guide elements and thus causing the flow of the fluid to have a better contact with the guide elements when flowing around them. This reduces turbulences within the ultrasonic flow meter. Compared to the devices known from the related art, the ultrasonic flow meters described are distinguished by an improved signal-to-noise ratio and accordingly by a higher measuring precision.
    • 机动车内燃机进气系统的体积流量或质量流量的测量在减少污染物排放方面起着重要的作用。 因此,描述了用于测量在主流动方向上流动的流体的流量的超声波流量计。 超声波流量计具有至少两个超声波换能器,超声换能器能够以与90°不同的一次流动方向的角度α发射和/或接收超声波。 此外,超声波流量计具有至少一个完全或部分位于流体中的引导元件。 该引导元件以这样一种方式使流动流体的至少一部分转向,即在转向中,速度分量被传递到垂直于主流动方向的流动流体的至少一部分。 导向叶片或置换器特别被描述为导向元件。 此外,可以在引导元件上设置紊流器,所述湍流器沿着引导元件产生纵向流体床,并且因此当流体流动时,使流体流动与引导元件更好地接触。 这可以减少超声波流量计内的湍流。 与现有技术中已知的装置相比,所描述的超声波流量计通过提高的信噪比并因此通过更高的测量精度来区分。
    • 78. 发明申请
    • Device for determing at least one parameter of a medium flowing inside a conduit
    • 用于确定在导管内流动的介质的至少一个参数的装置
    • US20060150730A1
    • 2006-07-13
    • US10534105
    • 2003-05-23
    • Thomas LenzingKlaus ReymannUwe KonzelmannTobias LangChristoph Gmelin
    • Thomas LenzingKlaus ReymannUwe KonzelmannTobias LangChristoph Gmelin
    • G01M19/00
    • F02M35/021F02D41/18G01F1/6842G01F5/00G01F15/12
    • A device for determining at least one parameter of a medium flowing in a line in a main flow direction includes a part adapted for introduction into the line. The part may include a measuring element for determining the at least one parameter; a measuring channel that may include an inlet, an outlet, a bent first section between the inlet and the measuring element, and a second section into which the first section may transition, the measuring element being located in the second section; and a projection, where a partial stream of the medium may flow in a measuring channel flow direction from the inlet to the outlet, the first section may redirect the partial stream after entering the measuring channel, and the projection may project into the measuring channel at a location downstream from the inlet and upstream from the measuring element relative to the measuring channel flow direction to direct the flow of the partial stream, and counteract a separation of the flow of the partial stream from channel walls of the measuring channel.
    • 用于确定在主流动方向上在一行中流动的介质的至少一个参数的装置包括适于引入到该线中的部分。 该部件可以包括用于确定至少一个参数的测量元件; 测量通道,其可以包括入口,出口,入口和测量元件之间的弯曲的第一部分,以及第一部分可以转过的第二部分,测量元件位于第二部分中; 以及投影,其中介质的部分流可以在从入口到出口的测量通道流动方向上流动,第一部分可以在进入测量通道之后重新定向部分流,并且投影可以投射到测量通道中 位于入口下游并且相对于测量通道流动方向上游的位置,以引导部分流的流动,并且抵消部分流的流动与测量通道的通道壁的分离。