Back to results
US 8,510,070 B2Granted
Non-contacting temperature profile measurement of rotating rolls
AssigneeHoneywell International Inc.
InventorTuomo Tapio Mäkinen
Life of this patent
Estimating the term…
Abstract
A high-resolution, non-contact sensor that measures the temperature of an elongated roll comprises an array of low-mass air temperature elements positioned adjacent the cylindrical surface. As the roll rotates a boundary layer of air is formed along the contour of the roll. Each air temperature element can be housed in a chamber into which a portion of the boundary layer air directed. The temperature of the air temperature element eventually stabilizes and is a function of the roll surface temperature. Associated air compensator elements detect ambient air temperatures and the actual surface temperature profile is extracted from calibration curves based on measurements from both the air temperature and compensator elements.
Claims23
A device for measuring the temperature of an exterior surface of a rotating roll that is rotatable about a longitudinal axis that comprises:
- an air temperature sensor, which is housed in a chamber having an entrance and an exit, and which is configured to be positioned adjacent the surface of the rotating roll such that a gap is established between the air temperature sensor and the surface of the rotating roll;
- a guide panel having an exterior surface with a curved contour that matches the exterior surface of the rotating roll and positioned downstream of the entrance of the chamber wherein rotation of the rotating roll causes air to flow through the gap and diverts turbulent air into the entrance of the chamber and onto the air temperature sensor, and wherein the air temperature sensor generates first signals that are indicative of the temperature of the air that comes into contact with the air temperature sensor;
- a compensator temperature sensor that generates second signals that are indicative of ambient temperature;
- a standardizing sensor that generates third signals that are indicative of the surface temperature of the roll;
- and
- means for calculating the temperature of the surface of the rotating roll based on the first signals, second signals, and third signals.
3 more elements
An apparatus for detecting the exterior surface temperature profile of an elongated rotating roll rotating about a longitudinal axis that comprises:
- (a) a reference sensor configured to be positioned adjacent a first location along the length of the roll which comprises:
- (i) a reference air temperature sensor configured such that a gap is established between the reference air temperature sensor and the surface of the rotating roll, wherein rotation of the rotating roll causes air to flow through the gap and onto the reference air temperature sensor, and wherein the reference air temperature sensor generates first signals that are indicative of the temperature of the air that comes into contact with the reference air temperature sensor;
- (ii) a reference compensator temperature sensor that generates second signals that are indicative of ambient temperature;
- and
- (iii) a standardizing sensor that generates third signals that are indicative of the surface temperature of the roll;
- (b) a plurality of profile sensors which are each configured to be positioned at a location along the length of the roll with each profile sensor comprising:
- (i) a profile air temperature sensor, which is housed in a chamber having an entrance and an exit, and which is configured such that a gap is established between each profile air temperature sensor and the surface of the rotatable roll;
- (ii) a guide panel having an exterior surface with a curved contour that matches the exterior surface of the rotating roll and positioned downstream of the entrance of the chamber wherein rotation of the rotatable roll causes air to flow through each gap and diverts turbulent air into the entrance of the chamber and onto the profile air temperature sensor, and wherein each profile air temperature sensor generates first signals that are indicative of the air flow that comes into contact with the profile air temperature sensor;
- and
- (iii) a profile compensator sensor that generates second signals that are indicative of ambient temperature;
- and
- (c) means for calculating the surface temperature profile of the rotatable roll based on the first signals, the second signals, and third signals.
9 more elements
A method of monitoring the surface temperature profile of a rotating roll along it length that comprises the steps of:
- (a) positioning a plurality of temperature gauge assemblies adjacent to and along the length of a rotatable roll, which is capable of rotating about its longitudinal axis and forming a boundary layer of air along a contour of the rotating roll, wherein each temperature gauge assembly comprises:
- (i) an air temperature sensor, which is housed in a chamber having an entrance and an exit, and which is positioned adjacent the surface of the rotating roll such that a gap is established between the air temperature sensor and the surface of the rotatable roll;
- (ii) guide panel having an exterior surface with a curved contour that matches the exterior surface of the rotating roll and positioned downstream of the entrance of the chamber wherein rotation of the rotating roll causes air to flow through the gap and diverts turbulent air into the entrance and onto the air temperature sensor, and wherein the air temperature sensor generates first signals that are indicative of the temperature of the air that comes into contact with the air temperature sensor;
- (iii) a compensator sensor that generates second signals that are indicative of ambient temperature wherein the compensator sensor is shielded from radiant energy transmitted from the rotating roll and from the air flow;
- and
- (iv) a standardization sensor that generates third signals that are indicative of the surface temperature of the roll;
- (b) calibrating the air temperature sensor, the compensator sensor and the standardizing sensor and constructing calibration curves;
- (c) obtaining measurements from the air temperature sensor that generates first signals;
- (d) obtaining measurements from the compensator sensor that generates second signals;
- and
- (e) calculating the temperature of the surface of the rotatable roll based on the first signals and the second signals.
8 more elements
Dependencies are inferred from the claim text.