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1. 发明授权

US06480812B1 Vortex flowmeter 有权
标题翻译：涡街流量计
公开(公告)号：US06480812B1
公开(公告)日：2002-11-12
申请号：US09645258
申请日：2000-08-24
申请人： Masami Wada , Masanori Hondo , Tetsuo Andoh
发明人： Masami Wada , Masanori Hondo , Tetsuo Andoh
IPC分类号： G01F132
CPC分类号： G01F1/329
摘要： The invention encompasses a vortex flowmeter for measuring the flow rate of a fluid by detecting an alternating signal produced by Karman vortices using a sensor comprising a low pass filter for passing the frequency band of the alternating signal that is determined by the diameter and flow rate range of the vortex flowmeter; subband filters for splitting the frequency band passing through the low pass filter into a plurality of component bands; a spectrum analyzer for analyzing the plurality of component bands; and a bandpass filter for passing a frequency band to be measured according to the analysis results of the spectrum analyzer, thereby providing flow rate measurement with high precision.
摘要翻译：本发明包括一种涡流流量计，用于通过使用包括低通滤波器的传感器检测由卡门涡流产生的交变信号来测量流体的流量，该低通滤波器用于通过由直径和流量范围确定的交变信号的频带的涡街流量计; 子带滤波器，用于将通过低通滤波器的频带分成多个分量频带; 用于分析多个分量频带的频谱分析仪; 以及带通滤波器，用于根据频谱分析仪的分析结果通过待测频带，从而提供高精度的流量测量。

2. 发明授权

US5841035A Vortex flowmeter 失效
标题翻译：涡街流量计
公开(公告)号：US5841035A
公开(公告)日：1998-11-24
申请号：US828874
申请日：1997-03-31
申请人： Tetsuo Andoh , Yoshinori Matsunaga , Takashi Kawano , Masanori Hondo , Masami Wada , Kazuo Nagata
发明人： Tetsuo Andoh , Yoshinori Matsunaga , Takashi Kawano , Masanori Hondo , Masami Wada , Kazuo Nagata
IPC分类号： G01F1/32
CPC分类号： G01F1/3281 , G01F1/329
摘要： A vortex flowmeter for calculating the flow rate of a measuring fluid flowing through a flow path using ultrasonic signals subjected to changes in the propagation time due to Karman vortices, comprising a reference signal generating device for outputting a plurality of reference signals of different phases; a signal analyzing device for outputting an input status signal by determining the relationship between the phases of the ultrasonic signals and each reference signal; a plurality of phase detectors for outputting phase signals by detecting the phase difference between the ultrasonic signals and the reference signals; and a channel selector for selecting the optimum phase signal using the input status signal and for outputting the optimum phase signal as a selection signal, wherein the flow rate signals are computed and outputted using the selected phase signal. The vortices are thus stably detected even when a phase change due to the vortices in the vortex flowmeter is large.
摘要翻译：一种涡流流量计，用于通过使用由于卡曼涡流引起的传播时间变化的超声波信号计算流过流路的测量流体的流量，包括用于输出多个不同相位的参考信号的参考信号发生装置; 信号分析装置，用于通过确定超声波信号的相位与每个参考信号之间的关系来输出输入状态信号; 多个相位检测器，用于通过检测超声信号与参考信号之间的相位差来输出相位信号; 以及频道选择器，用于使用输入状态信号选择最佳相位信号并输出最佳相位信号作为选择信号，其中使用所选择的相位信号来计算和输出流量信号。因此即使由于涡流流量计中的涡流引起的相变大，也能够稳定地检测涡流。

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