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公开(公告)号：US6151557A
公开(公告)日：2000-11-21
申请号：US6452
申请日：1998-01-13
申请人： David A. Broden , David E. Wiklund
发明人： David A. Broden , David E. Wiklund
摘要： A method in a pressure transmitter and a pressure transmitter for determining a mass flow rate of a fluid in a conduit measure a differential pressure between two points in the fluid, where the conduit has a substantially constant cross-sectional area between the two points. In one aspect, the mass flow rate is calculated by multiplying the square-root of the differential pressure by a mass flow constant.
摘要翻译： 用于确定管道中的流体的质量流量的压力变送器和压力变送器中的方法测量流体中两个点之间的压差，其中导管在两个点之间具有基本恒定的横截面积。 一方面，通过将压差的平方根乘以质量流量常数来计算质量流量。
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公开(公告)号：US5920016A
公开(公告)日：1999-07-06
申请号：US929804
申请日：1997-09-15
申请人： David A. Broden
发明人： David A. Broden
CPC分类号： G01L19/0015 , Y10T137/9029
摘要： A transmitter of the type used in the process control industry includes a sensor for sensing a process variable and a transmitter body having a sensor coupling. A sensor extension couples to the sensor coupling and includes a sensor coupling face. A first flange interface has a process face which provides a process connection and a sensor face which provides a sensor connection. A passageway couples the process connection to the sensor connection. The first flange interface is coupled to the sensor extension by a coupling mechanism. The sensor extension and the first flange interface may be moved throughout a range of positions relative to one another.
摘要翻译： 在过程控制行业中使用的类型的发射器包括用于感测过程变量的传感器和具有传感器耦合的发射器主体。 传感器延伸件耦合到传感器联轴器并且包括传感器联接面。 第一法兰接口具有提供过程连接的工艺面和提供传感器连接的传感器面。 通道将过程连接耦合到传感器连接。 第一法兰接口通过联接机构联接到传感器延伸部。 传感器延伸部和第一法兰接口可以在相对于彼此的位置范围内移动。
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公开(公告)号：US5495769A
公开(公告)日：1996-03-05
申请号：US445469
申请日：1995-05-22
CPC分类号： G08C19/02
摘要： In this invention, a multivariable transmitter providing an output representative of mass flow has a dual microprocessor structure. The first microprocessor compensates digitized process variables and the second microprocessor computes the mass flow as well as arbitrating communications between the transmitter and a master. In a second embodiment of the present invention, a first microprocessor compensates digitized process variables, a second microprocessor computes an installation specific physical parameter such as mass flow and a third microprocessor arbitrates real-time communications between the transmitter and a master.
摘要翻译： 在本发明中，提供代表质量流量的输出的多变量发射器具有双微处理器结构。 第一个微处理器补偿数字化过程变量，第二个微处理器计算质量流量以及仲裁发射机和主站之间的通信。 在本发明的第二实施例中，第一微处理器补偿数字化的过程变量，第二微处理器计算诸如质量流的安装特定物理参数，并且第三微处理器仲裁发射机和主机之间的实时通信。
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公开(公告)号：USD317266S
公开(公告)日：1991-06-04
申请号：US184695
申请日：1988-04-22
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