Title:
DISTANCE CHARACTERISTIC INSPECTION DEVICE OF OBJECT LOCATION INSPECTION SENSOR
Document Type and Number:
Japanese Patent JPH04223212
Kind Code:
A
Abstract:
PURPOSE:To enable time until a location where an output of an object position detection sensor becomes the largest to be reduced by reducing the number of samplings. CONSTITUTION:A distance X between a reflection type photo interrupter 1 and a reflection plate 2 is changed by operating a reflection plate drive part 4 and a measuring equipment part 3 and then an output Y of the reflection type photo interrupter 1 is measured, thus obtaining N data Xi, Yi (i=1, 2,...). An approximation expression Y=f(X) where the output Y of the reflection type photo interrupter 1 is expressed by the distance X to a reflection plate 2 is calculated by the method of least squares with an approximation calculation means 10 within a control part using these N data. Further, a difference (e) between a function value f(Xi) at a same distance Xi and a measurement data Yi of an output is calculated by an error calculation means 11. An error judgment means 12 examines if this error (e) is smaller than a specified value and then the approximation expression Y=f(X) is set to a function expression between the output Y of the reflection type photo interrupter 1 and the distance X when the difference (e) becomes smaller than the specified value. Xmax when the output Y becomes the maximum is calculated from this expression and the reflection plate 2 is moved to a position of Xmax and is fixed.
Inventors:
YAMASHITA KEITARO
Application Number:
JP40655890A
Publication Date:
August 13, 1992
Filing Date:
December 26, 1990
Export Citation:
Assignee:
SHARP KK
International Classes:
G01B21/00; G01C3/06; G01V8/10; (IPC1-7): G01B21/00; G01C3/06; G01V9/04
Attorney, Agent or Firm:
Nakamura Tsunehisa
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