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Programmable Radiometer for Use on Various Emissivity Materials

IP.com Disclosure Number: IPCOM000019331D
Publication Date: 2003-Sep-11
Document File: 1 page(s) / 40K

Publishing Venue

The IP.com Prior Art Database

Abstract

The following invention is an adaptation of an existing radiometer and consists of an additional programmable feature whereas a microprocessor and EPROM is incorporated into a variable emissivity radiometer such that the fuser roll or component to be measured on a product may be pre-programmed into the device with its emissivity in a way that when the machine model number and part number is entered, the correct emissivity of that object is pre-selected so accurate measurements can be taken.

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Programmable Radiometer for Use on Various Emissivity Materials

The following invention is an adaptation of an existing radiometer and consists of an additional programmable feature whereas a microprocessor and EPROM is incorporated into a variable emissivity radiometer such that the fuser roll or component to be measured on a product may be pre-programmed into the device with its emissivity in a way that when the machine model number and part number is entered, the correct emissivity of that object is pre-selected so accurate measurements can be taken. Without this information entry, the unit will not measure temperature.

In a typical large xerographic printer, one has a fuser roll, 2 external heat rolls, a pressure roll, a donor roll, and a metering roll all having emissivity ratings from 0.14 to 0.95. Because of design architecture, measuring temperatures in the field is a difficult proposition, Radiometers of various designs are found to be rendered inaccurate in part due to contamination of the sensor heads and in part due to battery-life-sensitive algorithms for compensating for emissivity and partly due to the design of the devices’ sensor heads which are affected by fuser oils and high temperatures that the heads must contact to get readings. This condition renders these types of devices unreliable for accuracy.

Several manufacturers make reliable digital radioimeters with an adjustable emissivity feature. This feature assumes, however, that the technician will cor...