Radiant energy – Photocells; circuits and apparatus – With circuit for evaluating a web – strand – strip – or sheet
Reexamination Certificate
2008-06-10
2008-06-10
Epps, Georgia (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
With circuit for evaluating a web, strand, strip, or sheet
C250S559370, C250S559380, C073S001750
Reexamination Certificate
active
07385214
ABSTRACT:
The invention relates to a measuring arrangement comprising a sensor head (13) that can be displaced over a surface (11) at a distance therefrom in a scanning direction (R), a plurality of distance sensors which are suitable for distance measurement and are interspaced in the scanning direction in a fixed manner, a displacement device for displacing the sensor head (13) in such a way that points of the surface (11) are detected in successive scanning steps carried out by a plurality of distance sensors, and an evaluation device to which the output signals of the distance sensors are supplied. According to the invention, one such measuring arrangement is improved by an angle measuring device (14, 15) for determining an angle value of the sensor head (13) in relation to the scanning direction (R), and for forwarding said angle value to the evaluation device. In this way, systematic measuring errors can be eliminated for the reconstruction of a topography of the surface (11) in the scanning direction (R). Furthermore, the sensor head (13) can be calibrated by means of the measuring arrangement.
REFERENCES:
patent: 4585350 (1986-04-01), Pryor
patent: 5106183 (1992-04-01), Yoder, Jr.
patent: 19926546 (2000-12-01), None
patent: 10161486 (2003-07-01), None
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patent: 1 391 684 (2004-02-01), None
Weingartner et al. System for Four Distance Sensors for High-Accuracy Measurement of Topography, Precision Engineering, Bd. 28, N. 2, pp. 164-170, Apr. 2004.
Elster Clemens
Schulz Michael
Weingaertner Ingolf
Bundesrepublik Deutschland, vertreten durch das Bundesministeriu
Epps Georgia
Legasse Jr. Francis M
Whitham Curtis Christofferson & Cook PC
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