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1. 发明授权

US4773274A Electromagnetic flow meter 失效
标题翻译：电磁流量计
公开(公告)号：US4773274A
公开(公告)日：1988-09-27
申请号：US019882
申请日：1987-02-27
申请人： Tamotsu Kobayashi , Kenichi Kuromori , Shigeru Goto , Yoshinori Matsunaga , Takashi Torimaru , Norihiro Shikuya , Tadashi Azegami
发明人： Tamotsu Kobayashi , Kenichi Kuromori , Shigeru Goto , Yoshinori Matsunaga , Takashi Torimaru , Norihiro Shikuya , Tadashi Azegami
IPC分类号： G01F1/60
CPC分类号： G01F1/60
摘要： An electromagnetic flow meter for measuring the flow rate of a fluid by applying to the fluid a magnetic field generated with an exciting current and measuring the resulting signal voltage generated at a pair of electrodes; wherein the exciting current comprises two frequency components which are lower and higher than the usual commercial frequency and the signal voltage comprises two frequencies which are discriminated so that a higher frequency is extracted as a first output and a lower frequency is extracted as a second output, through a low pass filter having a large time constant. A predetermined operation, such as addition, zero correction, response correction, etc, is carried out on the first and second outputs to produce a flow rate output. The invention has quick response, stable zero point and reduced susceptibility to noises.
摘要翻译：一种电磁流量计，用于通过向流体施加用励磁电流产生的磁场并测量在一对电极处产生的所得到的信号电压来测量流体的流量; 其特征在于，所述励磁电流包括低于和高于通常的商用频率的两个频率分量，并且所述信号电压包括两个频率，所述两个频率被区分为使得较高频率被提取为第一输出，而较低频率被提取为第二输出，通过具有大时间常数的低通滤波器。在第一和第二输出端执行预定的操作，例如加法，零修正，响应校正等，以产生流量输出。本发明响应快，零点稳定，噪声敏感度降低。

2. 发明授权

US06477902B1 Coriolis mass flowmeter 失效
标题翻译：科里奥利质量流量计
公开(公告)号：US06477902B1
公开(公告)日：2002-11-12
申请号：US09697998
申请日：2000-10-25
申请人： Norikazu Oosawa , Kenichi Kuromori
发明人： Norikazu Oosawa , Kenichi Kuromori
IPC分类号： G01F184
CPC分类号： G01F1/8409 , G01F1/8418 , G01F1/8454 , G01F1/8472 , G01F1/849 , G01F1/8495
摘要： A Coriolis mass flowmeter comprising a vibration tube fixed to a housing at an upstream fixed point and a downstream fixed point and an original axis is taken as a straight line connecting these fixed points, wherein the vibration tube is operated so that the tube performs simple harmonic oscillation or circular motion on circumferences at predetermined distances away from each point on the original axis around the original axis take as a center. Since the vibration tube oscillates only in the circumferential planes at equal distances from the original axis, the length of the vibration tube does not vary regardless of the position of the tube. Thus, tensile force in the direction of the axis is always constant and leakage of vibration dued to variations in the force in the direction of the axis is eliminated. The enhanced isolation of vibration makes the vibration inside the flowmeter stable. Accordingly, a highly accurate and stable Coriolis mass flowmeter is achieved by the invention. Since the Q value of the internal vibration becomes high, the flowmeter is not easily affected by the vibration noise, consumes less power, and reduces zero and span changes due to changes in the amount of vibration leakage.
摘要翻译：科里奥利质量流量计包括固定在上游固定点和下游固定点的壳体上的振动管和原始轴线作为连接这些固定点的直线，其中振动管被操作以使得管子执行简单的谐波围绕原始轴的原始轴上的每个点的预定距离的周长的振动或圆周运动为中心。由于振动管仅在与原始轴线等距离的周向平面中振荡，所以振动管的长度不管管的位置如何变化。因此，轴的方向上的张力总是恒定的，并且消除了在轴方向上的力的变化引起的振动泄漏。增强的振动隔离使得流量计内的振动稳定。因此，通过本发明实现了高精度和稳定的科里奥利质量流量计。由于内部振动的Q值变高，流量计不容易受到振动噪声的影响，消耗较少的功率，并且由于振动泄漏量的变化而使零点和跨度变化减小。

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