| 摘要 |
An integrator for continuously computing the area under a curve drawn by a chart recorder, and displaying the area information along the edge of the chart. The integrator uses a voltage-to-frequency converter which derives its input from the slidewire circuitry of a potentiometric null-balance recorder of known type. The converter output drives a stepping motor at a rate depending on the ordinate position on the main recording pen. The stepping motor drives a cam which moves an auxiliary pen back and forth, to draw a triangular wave of variable spatial frequency. The area under any selected portion of the chart curve is found by counting cycles of this wave. The converter also delivers a pulse output which may be fed to an external counter, or recorded, as on magnetic tape, for later recovery or for processing with respect to other tapes or data in a digital computer. |
