Modular system of low cost form of construction for application-

Details Modular system of low cost form of construction for application- Modular system of low cost form of construction for application-

1993-07-08

1995-02-07

Chilcot, Jr., Richard E.

Measuring and testing

Volume or rate of flow

Mass flow by imparting angular or transverse momentum to the...

7386137, G01F 178, G01F 184

Patent

active

053867327

ABSTRACT:
A system for construction of mass density sensors and mass flow sensors using modular elements to construct low cost, application optimized, sensor assemblies. The basic configuration is a mass density sensor, including a frame (13), an internal conduit (50), and a pair of integrated torquer/angular motion pickup modules (100a,b). Application specific seal modules (60a,b, 62a,b, 64a,b) are provided between the internal conduit (50) and interface ports (20a,b) on the frame (13). The internal conduit (50) is connected to the frame by a system of radial stays (90a,b) and (91a,b) and lateral stays (130a,b) and (132a,b). The pair of integrated torquer/angular motion pickup modules (100a,b) is fixed on the frame (13). Permanent bar magnets (70a,b) are fixed to the internal conduit (50). The sensor is connected to an external conduit. During operation, the internal conduit (50) is driven to oscillate in rotation relative to the frame (13). This angular motion is around a well defined rotation axis and is at the natural frequency of oscillation of the stay and internal conduit system. The instantaneous velocity of this angular motion is sensed and converted to a signal by the angular velocity sensing circuit (190). The signal is conditioned by an application-optimized circuit (230) to assure distortion-free transmission of the signal to the external system.

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