Electronic integrator for chart recorder
US4035809A · kind A · utility
Inventor
Key dates
| Filing date | Dec 29, 1975 |
| Grant date | Jul 12, 1977 |
| Priority date | — |
| Expiry date | Dec 29, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D9/32
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An integrator for continually computing the area under a curve drawn by a chart recorder, and displaying the area information by superimposing small spikes on the curve. The integrator uses a voltage-to-frequency converter that derives its input from the signal source to generate the spikes. A frequency divider circuit can be used so that every nth spike is larger or negative, making readout easier. The spikes and the analog signal are electronically added and the resulting signal is connected to a standard laboratory pen chart recorder. The area under any selected portion of the chart curve is found by counting the spikes on the curve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.