Device for monitoring and/or measuring parameters of a running,

Details Device for monitoring and/or measuring parameters of a running, Device for monitoring and/or measuring parameters of a running,

1990-06-07

1991-10-08

Shoap, Allan N.

Measuring and testing

Sheet, woven fabric or fiber

Filament

250561, 250571, 324671, 356238, 356429, 356430, G01B 732, G01B 1110, G01B 708

Patent

active

050543172

ABSTRACT:
The device contains a measuring gap, which is provided for the passage of the test material, the measuring gap having two side walls each of which is provided with a measuring electrode forming part of a capacitive measuring element. An optical measuring element having a light source arranged on one side of the measuring gap and having a photoelectric element is provided in addition to the capacitive measuring element, and both measuring elements form part of a common measuring head. The fluctuations in accuracy of previous measuring heads having only one measuring element are thereby reduced and automatic checking of the measuring head output can be preformed. In addition, parameters which could not be determined with previous measuring heads can be measured and monitored in accordance with the present invention.

REFERENCES:
patent: 2516768 (1950-07-01), Grob et al.
patent: 3039051 (1962-06-01), Locher
patent: 3922601 (1975-11-01), Martin, Jr.
patent: 4184770 (1980-01-01), Pinior
patent: 4233520 (1980-11-01), Canfield
patent: 4294545 (1981-10-01), Stutz
patent: 4511253 (1985-04-01), Glockner et al.
patent: 4610707 (1986-09-01), Grundy
patent: 4706014 (1987-11-01), Fabbri
"Electronics and Computers", Second Edition, by Sybil P. Parker McGraw-Hill Company, 1988, pp. 324-325.
Philips Technical Publication No. 260, "Liquid Crystal Displays. . . Principles and Applications," (Aug. 1988).

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