System and method for linearizing analog measurements during ana

Details System and method for linearizing analog measurements during ana System and method for linearizing analog measurements during ana

1974-02-22

1976-09-07

Sloyan, Thomas J.

Communications: electrical

Audible indication

Percussion-type sound producer

73 1F, H03K 1302

Patent

active

039797457

ABSTRACT:
An instrument for linearizing a non-linear analog output produced from a sensor such as a thermocouple to obtain a true measurement of the parameter or engineering units of interests. The full range of the non-linear analog output is divided into segments and within each segment the second slope or the rate of change of the first slope of the analog output is predetermined and stored. In carrying out measurements, the magnitude of the analog output sensed is converted to constant frequency pulses. When measurements are carried out, within a given segment the corresponding second slope data is employed to modify the frequency of the constant frequency pulses to obtain output pulses for accumulation. These output pulses have a frequency which at any given moment is representative of the first slope of the analog output and which changes at a rate representative of the rate of change of the first slope of the analog output. The resulting output pulses thus are accumulated at a non-linear rate to obtain an output that will accurately follow the non-linear curve of the sensor and which will result in a true measurement of the engineering units of interest.

REFERENCES:
patent: 3092998 (1963-06-01), Barton
patent: 3349390 (1967-10-01), Glassman
patent: 3354452 (1967-11-01), Bard et al.
patent: 3568181 (1971-03-01), Weaver
patent: 3662163 (1972-05-01), Miller et al.
patent: 3685048 (1972-08-01), Pincus
patent: 3686665 (1972-08-01), Elias et al.
patent: 3701145 (1972-10-01), Bergin

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