HEATING TEMPERATURE CONTROL METHOD IN HEATING TEMPERATURE VARIATION TEST FOR MATERIAL

摘要

PURPOSE: To provide a heating temperature control method in heating temperature variation test for material in which the handling is simplified without causing any hunting in the control system and the heating temperature of a test piece can be controlled relatively easily along a target temperature. ;CONSTITUTION: A test piece is heated up to the highest temperature of a temperature cycle determined by a target temperature signal. When the test piece is eventually cooled down a lowest temperature, an integrating means 113b integrates the component of a differential signal which has exceeded a predetermined value. The opening of an air valve 8c is then regulated based on an output from the integrating means 113b thus controlling the quantity of cooling air being fed to a heating/cooling means. A procedure for resetting the integrated value after the test piece is cooled down to the lowest temperature on temperature cycle determined by a target temperature signal before the test piece is heated again up to the highest temperature is repeated.;COPYRIGHT: (C)1995,JPO