Back to results
US 4,379,991 AGranted
Apparatus for accurately measuring the volume of a meter prover
AssigneeRockwell International Corporation
InventorsWilliam W. Ho, William F. Hall
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeRockwell International Corporation
InventorsWilliam W. Ho, William F. Hall
Estimating the term…
Apparatus and method are disclosed for measuring the volume of a chamber of a meter prover. The meter prover includes a piston adapted for rectilinear movement within said cylinder between a first position and a second position. The volume measuring apparatus comprises an antenna disposed within the chamber and a generator coupled to apply electromagnetic energy to the antenna whereby electromagnetic waves are emanated into the chamber. A detector is coupled to the antenna to detect electromagnetic energy reflected from the chamber and is in turn coupled to a resonant detector in the form of a cathode ray tube, whereby a minimum of the level of the electromagnetic energy may be determined. Further, a frequency detector in the form of a counter, is connected to the output of the generator to detect the frequencies of the generator output at which the minimum level occurs as observed upon a display device corresponding to the establishment of a resonant standing wave within the chamber of the meter prover. The frequency(ies) at which the resonant standing waves are established within the chamber, in turn determine the volume of the meter prover chamber. The electromagnetic field(s) are generated within the chamber of a mode selected so that at a resonant condition within the chamber, the electric and magnetic component fields of the electromagnetic field have a defined relation to the dimensions of the chamber of regular geometry, illustratively, a right circular cylinder.
Apparatus for measuring with a high degree of accuracy the volume of a chamber of a meter prover, said chamber having the regular geometry of a right circular cylinder, the volume of said right circular cylinder being defined its diameter and length, said measuring apparatus comprising;
A method of measuring accurately the volume of a meter prover, the meter prover including a chamber having the geometry of a right circular cylinder and dimensions including its diameter and axial length to be measured, said method comprising the steps of:
A method of measuring accurately the volume of a chamber having the geometry of a right circular cylinder, the volume of said right circular cylinder being defined by its diameter and length, said method comprising the steps of:
Dependencies are inferred from the claim text.