Apparatus for measuring a metal surface position
First Claim
1. An apparatus for measuring a change along a predetermined direction of a surface position of a metallic mass comprising:
- a magnetic sensing type metal sensor reciprocably movable along said predetermined direction and arranged in spaced relation to said metal surface,drive means operative to drive said sensor along said predetermined direction,follow-surface means for comparing an output of said sensor with a predetermined reference distance value and activating said drive unit in accordance with a difference signal of the comparison for causing said sensor to follow the change along said predetermined direction of the surface position of said metal,means for determining the surface position of said metal based on a current position of said sensor,noise storing means for measuring a noise component in the output of said sensor due to factors other than the change of the surface position of said metal and storing said noise component; and
correction means for correcting said difference signal by said noise component stored in said storing means for activating said drive unit by the corrected signal.
1 Assignment
0 Petitions
Accused Products
Abstract
In an apparatus having a magnetic sensing type metal sensor arranged in spaced relation to a surface of metal under measurement and reciprocable in a predetermined direction, a tracing unit for driving the sensor in accordance with a change in the output of the sensor due to a change of position of the metal in the predetermined direction for causing the sensor to follow the surface position of the metal, and a measuring unit for measuring the surface position of the metal based on a current position of the sensor; a metal surface position measuring apparatus comprising a measuring and storing device for measuring a noise component in the output of the sensor due to factors other than a change of the surface position of the metal and storing the noise component, and correction device for correcting the output of the sensor by the stored noise component and causing the sensor to be moved in accordance with the corrected output.
10 Citations
7 Claims
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1. An apparatus for measuring a change along a predetermined direction of a surface position of a metallic mass comprising:
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a magnetic sensing type metal sensor reciprocably movable along said predetermined direction and arranged in spaced relation to said metal surface, drive means operative to drive said sensor along said predetermined direction, follow-surface means for comparing an output of said sensor with a predetermined reference distance value and activating said drive unit in accordance with a difference signal of the comparison for causing said sensor to follow the change along said predetermined direction of the surface position of said metal, means for determining the surface position of said metal based on a current position of said sensor, noise storing means for measuring a noise component in the output of said sensor due to factors other than the change of the surface position of said metal and storing said noise component; and correction means for correcting said difference signal by said noise component stored in said storing means for activating said drive unit by the corrected signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification