发明名称 |
VIBRATORY SENSOR AND METHOD OF VARYING VIBRATION IN A VIBRATORY SENSOR |
摘要 |
A vibratory sensor (5) includes a vibratory element (104), a receiver circuit (134) that receives a vibration signal from the vibratory element (104), and a drive circuit (138) that generates a drive signal. The drive circuit (138) includes a closed-loop drive (143) and an open-loop drive (147). The meter electronics (20) vibrates the vibratory element (104) commencing at a commanded first frequency and in an open-loop manner to achieve a first target phase difference φ1 for a fluid being characterized and determines a corresponding first frequency point ω1, vibrates the vibratory element (104) commencing at a commanded second frequency and in the open-loop manner to achieve a second target phase difference φ2 and determines a corresponding second frequency point ω2, and determines a viscosity of the fluid being characterized using the first frequency point ω1 and the second frequency point ω2. |
申请公布号 |
US2016061708(A1) |
申请公布日期 |
2016.03.03 |
申请号 |
US201314782135 |
申请日期 |
2013.05.31 |
申请人 |
MICRO MOTION, INC. |
发明人 |
Kravitz Andrew S.;McAnally Craig B |
分类号 |
G01N11/16 |
主分类号 |
G01N11/16 |
代理机构 |
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代理人 |
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主权项 |
1. A vibratory sensor (5), comprising:
a vibratory element (104) configured to generate a vibration signal; and a receiver circuit (134) that receives the vibration signal from the vibratory element (104); and a drive circuit (138) coupled to the receiver circuit (134) and the vibratory element (104) and generating a drive signal that vibrates the vibratory element (104), wherein the drive circuit (138) vibrates the vibratory element (104) commencing at a commanded first frequency and in an open-loop manner to achieve a first target phase difference φ1 for a fluid being characterized and determines a corresponding first frequency point ω1, vibrates the vibratory element (104) commencing at a commanded second frequency and in the open-loop manner to achieve a second target phase difference φ2 and determines a corresponding second frequency point ω2, and determines a viscosity of the fluid being characterized using the first frequency point ω1 and the second frequency point ω2. |
地址 |
Boulder CO US |