Digital electronic balancing apparatus

In electronic balancing apparatus for carrying out the dual plane aspect balancing analysis of a rotatable body in conjunction with the rotation thereof at a given rotational frequency upon a support structure, said structure having calibration vibrator means associated therewith energizable to impart an oscillation of predetermined dynamic characteristic to said body and transducer means associated with said support structure for deriving vibration responsive signals, the improvement characterized by:

• analyzer network means including means defining a filter synchronous with said body rotational frequency and responsive to said vibration responsive signals for deriving first and second phase related signals;
• converter means for converting said first and second phase related signals, respectively, to first and second digital signals;
• geometric data input switch means manually actuable to provide selected dimensional data signals corresponding with select dimensional parameters of the geometry of said rotatable body with respect to said support structure;
• processor means for selectively recepting said first and second digital signals into random access memory and responsive thereto and to said dimensional data signals for computing vector categorized balance deriving weight and position data and providing readout signals corresponding therewith and further responsive to subsequent said geometric data input switch means actuation to alter said retention of said selected dimensional data signals with respect to said actuation and recompute said data to provide revised said readout signals;
• and
• readout means responsive to said readout signals for providing visual digital readouts representing balance deriving weight and position information.

In electronic balancing apparatus for carrying out the dual plane aspect balancing analysis of a rotatable body in conjunction with the rotation thereof at a given rotational frequency upon a support structure, said apparatus having transducer means associated with said support structure for deriving unbalance responsive signals, the improvement characterized by:

• analyzer network means including means defining a filter synchronous with said body rotational frequency and responsive to said unbalance responsive signals for deriving first and second phase related signals;
• converter means for converting said first and second phase related signals, respectively, to first and second digital signals;
• geometric data input switch means manually actuable to provide selected dimensional data signals corresponding with select dimensional parameters of the geometry of said rotatable body with respect to said support structure;
• processor means for selectively recepting said first and second digital signals into random access memory and responsive thereto and to said dimensional data signals for computing vector categorized balance deriving weight and position data and providing readout signals corresponding therewith and further responsive to subsequent said geometric data input switch means actuation to alter said retention of said selected dimensional data signals with respect to said actuation and recompute said data to provide revised said readout signals;
• and
• readout means responsive to said readout signals for providing visual digital readouts representing balance deriving weight and position information.

The apparatus of claim 16 in which said analyzer network means comprises:

• rotation monitoring means spaced from said body and having a pulse characterized output corresponding with the rotation of a given position on said body;
• counter means having a predetermined digital characterized output in response to said pulse characterized output;
• first and second memory means respectively retaining sine and cosine data and addressable by said counter means digital characterized output to derive respective first and second digital characterized trigonometric outputs;
• second converter means responsive to said first and second trigonometric outputs for deriving first and second analog teference outputs respectively corresponding therewith;
• and
• multiplier means responsive to said unbalance responsive signals and to said first and second reference outputs for deriving said first and second phase related signals.