Calibration apparatus and methods for a thermal proximity sensor

Details Calibration apparatus and methods for a thermal proximity sensor Calibration apparatus and methods for a thermal proximity sensor

1998-09-14

1999-12-21

Fulton, Christopher W.

Thermal measuring and testing

Thermal calibration system

374 6, 374 7, 374141, G01K 1500, G01N 2500

Patent

active

060040300

ABSTRACT:
Apparatus and methods for calibrating a thermal proximity sensor are disclosed. Thermal responses from a thermal proximity sensor are used to sense the instantaneous distance between the sensor and a medium over which the sensor is moved, in a data storage system. Sensing the instantaneous distance results in detection of topographical variations on the medium. Calibration techniques for the sensor are disclosed herein and involve, in one aspect, using primarily electrical measurements to calibrate the sensor; and in another aspect, varying the distance between the sensor and the medium, obtaining actual thermal responses from the sensor, and using the actual responses (via direct comparison or curve fitting) to calibrate the sensor. In one embodiment, the sensor is a magnetoresistive access element used to access data on the medium.

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