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    FLOW SIMULATING CIRCUIT FOR TESTING OF FLOWMETERS
    1.
    发明申请
    FLOW SIMULATING CIRCUIT FOR TESTING OF FLOWMETERS 审中-公开
    流量计流量模拟电路测试

    公开(公告)号：US20090000392A1

    公开(公告)日：2009-01-01

    申请号：US11831996

    申请日：2007-08-01

    申请人： Hua Zhou ,  Yikang Gu ,  Thomas James Batzinger ,  Baoming Huang ,  Xiaolei Shirley Ao ,  Jeffrey Tilden

    发明人： Hua Zhou ,  Yikang Gu ,  Thomas James Batzinger ,  Baoming Huang ,  Xiaolei Shirley Ao ,  Jeffrey Tilden

    IPC分类号： G01F1/20 ,  G01F1/66

    CPC分类号： G01F25/0007 ,  G01F1/667

    摘要： A simulating circuit (2), for testing a transit-time flowmeter (1) according to an embodiment of the invention, comprises an interface circuit (20) connecting with the transit-time flowmeter. The interface circuit receives driving signals from the transit-time flowmeter and generates a trigger signal on a rising or falling edge of the driving signals. An oscillator (21) outputs a clock signal. A delay generator (221) generates a preset time delay. A Digital to Analog Converter (DAC, 25) retrieves preset digitalized waveform. The DAC is enabled by the oscillator on ending of the preset time delay and converts the preset digitalized waveform into analog waveform output. The analog waveform output is sent back to the transit-time flowmeter, and thus a transit time or and a waveform through flowing fluids is simulated.

    摘要翻译： 根据本发明的实施例的用于测试通行时间流量计（1）的模拟电路（2）包括与过渡时间流量计连接的接口电路（20）。 接口电路接收来自通行时流量计的驱动信号，并在驱动信号的上升沿或下降沿产生触发信号。 振荡器（21）输出时钟信号。 延迟发生器（221）产生预设的时间延迟。 数模转换器（DAC，25）检索预设数字化波形。 在预设时间延迟结束时，DAC由振荡器使能，并将预设数字化波形转换为模拟波形输出。 模拟波形输出被发送回通过时间流量计，从而模拟流经流体的通过时间或波形。

    CORROSION DETECTION APPARATUS AND METHOD
    2.
    发明申请
    CORROSION DETECTION APPARATUS AND METHOD 审中-公开
    腐蚀检测装置及方法

    公开(公告)号：US20070159187A1

    公开(公告)日：2007-07-12

    申请号：US11685513

    申请日：2007-03-13

    申请人： Weiguo Chen ,  Yu Zhang ,  Gaorong He ,  Peter Allison ,  Yikang Gu ,  Yao Chen ,  Wei Cai ,  Brian Lasiuk ,  Shengxian Wang ,  Chang Wei

    发明人： Weiguo Chen ,  Yu Zhang ,  Gaorong He ,  Peter Allison ,  Yikang Gu ,  Yao Chen ,  Wei Cai ,  Brian Lasiuk ,  Shengxian Wang ,  Chang Wei

    IPC分类号： G01R27/08

    CPC分类号： G01N17/04

    摘要： A corrosion detection apparatus is provided. The corrosion detection apparatus is capable of detecting corrosion on a surface of a pipe or a vessel where the surface contacts a fluid that is corrosive to the surface. The corrosion detection apparatus includes a corrodible element having a contact surface; at least two electrodes that are in electrical communication with each other through a segment of the corrodible element; and a detector in communication with the at least two electrodes. The detector detects a characteristic impedance value from the at least two electrodes through the corrodible element segment.

    摘要翻译： 提供腐蚀检测装置。 腐蚀检测装置能够检测表面与表面腐蚀性的流体接触的管道或容器的表面上的腐蚀。 腐蚀检测装置包括具有接触表面的可腐蚀元件; 至少两个电极，其通过可腐蚀元件的一段彼此电连通; 以及与所述至少两个电极连通的检测器。 检测器检测来自至少两个电极通过可腐蚀元件段的特征阻抗值。