Method, apparatus, and program for controlling temperature within a heating system
AssigneeOMRON Corporation
InventorsMasahito Tanaka, Ikuo Nanno, Akira Takaishi
Life of this patent
Estimating the term…
Abstract
A temperature variation of a glass substrate 2 at a plurality of measuring points in a continuous furnace 3 when preset temperatures of respective furnaces 31-33 are changed is estimated in the form of a matrix based on a model, an inverse matrix of the matrix is used so as to calculate correction values in such manner that a temperature of the glass substrate 2 corresponds to a temperature of a desired temperature profile, and the preset temperatures are corrected based on the correction values.
Claims8
A temperature control method for controlling temperatures of a plurality of heat-treatment zones in a heat treatment applied to an object to be heat-treated while the object is moved in the plurality of heat-treatment zones, comprising:
- calculating a correction value based on a difference between a measured temperature of the object and a temperature of a desired temperature profile of the object, the correction value for correcting at least one of a targeted temperature and a detected temperature of each of the heat-treatment zones;
- controlling the temperatures of the respective heat-treatment zones based on the targeted temperature and the detected temperature of each of the heat-treatment zones,
- wherein the measured temperature of the object to be heat-treated is a temperature measured at at least one of a plurality of measuring points while the object is moved in the plurality of heat-treatment zones;
- applying the heat treatment by moving the object to be heat-treated in the plurality of heat-treatment zones and measuring the temperature of the object;
- obtaining a degree of interference between the heat-treatment zones at at least one of the plurality of measuring points of the object when the targeted temperature is changed based on the measured temperature of the object, the degree of interference being the degree of influence that the temperature of the object at each of the plurality of measuring points undergoes due to a thermal interference between the heat-treatment zones when preset temperatures of the heat-treatment zones are changed;
- and
- calculating the correction value based on the obtained degree of interference,
- wherein:
- obtaining the degree of interference comprises obtaining a matrix showing a relation between a variation of the targeted temperature and a temperature variation of the object to be heat-treated at the plurality of measuring points based on the measured temperature of the object, and
- the correction value is calculated by means of an inverse matrix of the matrix.
A temperature control apparatus comprising:
- a temperature adjusting device for controlling temperatures of a plurality of heat-treatment zones in a heat treatment applied to an object to be heat-treated while the object is moved in the plurality of heat-treatment zones;
- and
- a correcting device for calculating a correction value based on a difference between a measured temperature of the object and a temperature of a desired temperature profile of the object, wherein
- the temperature adjusting device controls the temperatures of the respective heat-treatment zones based on a targeted temperature and a detected temperature of each of the heat-treatment zones and corrects at least one of the targeted temperature and the detected temperature based on the correction value,
- wherein the measured temperature of the heat-treatment object is a temperature measured at at least one of a plurality of measuring points while the object is moved in the plurality of continuous heat-treatment zones,
- wherein the correcting device calculates the correction value based on a degree of interference between the heat-treatment zones at each of the plurality of measuring points of the object to be heat-treated when the targeted temperature is changed, the degree of interference being the degree of influence that the temperature of the object at each of the plurality of measuring points undergoes due to a thermal interference between the heat-treatment zones when preset temperatures of the heat-treatment zones are changed, and
- wherein the correcting device obtains the degree of interference by obtaining a matrix showing a relation between a variation of the targeted temperature and a temperature variation of the object to be heat-treated at the plurality of measuring points based on the measured temperatures of the object while the object is moved in the plurality of heat-treatment zones and calculates the correction value using an inverse matrix of the matrix.
A temperature adjusting device for use within a temperature control apparatus which includes a correcting device for calculating a correction value based on a difference between a measured temperature of an object to be heated and a temperature of a desired temperature profile of the object, wherein the temperature adjusting device controls temperatures of a plurality of heat-treatment zones while the object to be heated is moved in the plurality of heat-treatment zones;
- and further wherein the temperature adjusting device is capable of accepting input from the correcting device, wherein
- the temperature adjusting device controls the temperatures of the respective heat-treatment zones based on a targeted temperature and a detected temperature of each of the heat-treatment zones and corrects at least one of the targeted temperature and the detected temperature based on the correction value,
- wherein the measured temperature of the object to be heated is a temperature measured at one or more of a plurality of measuring points while the object is within a heat-treatment zone,
- wherein the correcting device calculates the correction value based on a degree of interference between the heat-treatment zones at one or more of the plurality of measuring points when the targeted temperature is changed, the degree of interference being the degree of influence that the temperature of the object at each of the plurality of measuring points undergoes due to a thermal interference between the heat-treatment zones when preset temperatures of the heat-treatment zones are changed, and
- wherein the correcting device obtains the degree of interference by obtaining a matrix showing a relation between a variation of the targeted temperature and a temperature variation of the object to be heated at the plurality of measuring points based on the measured temperatures of the object while the object is moved in the plurality of heat-treatment zones and calculates the correction value using an inverse matrix of the matrix.
Dependencies are inferred from the claim text.