EXPERIMENTAL STUDY ON THE RELATION BETWEEN THE CONDITION OF REMOVEMENT AND THE PRECISION OF DISTINCTION IN THE THERMOGRAPHY METHOD FOR THE EXTERNAL WALL WITH MORTAR FINISH

摘要

This paper is a experimental study to make clear about the relation between removement conditions and the enviroment condition and the inspection precision about the finish of external wall on the thermography method. Author did outdoor experiment, using the examination wall which has artificial removements which changed the thickness of removements, the thickness of mortar finish, the area of removement. Author classed the easiness of distinction into 5 degrees for each removed part on the thermographs. And author considered each relation about the change of the precision-along time,the difference of temperature between the removed part and the sound part,the solar radiation,and the temperature of outdoor air, When the thickness of removement and the removed area were larger,and the thickness of mortar was smaller, it became more easy to distinguish the removed part.