THERMAL CHARACTERISTIC MEASURING DEVICE AND MEASURING DEVICE FOR WATER CONTENT OF SOIL USING IT

摘要

PROBLEM TO BE SOLVED: To perform measurement of thermal characteristics in a form with lesser permeation into the object to be inspected, by inserting heat emitting bodies and a thermometer into the object while the distances between them are held constant, allowing the bodies to make heat emission for a specified period of time, and calculating the volume heat capacity and thermal conductivity from the temp. rising speed peak value measured by the thermometer and the peak time in the temp. rising speed. ;SOLUTION: A sensor probe holds two heat emitting bodies 10 and a thermometer 30 installed between them, in a combteeth arrangement so as to facilitate insertion into the soil. A converter is connected with the probe and includes a heat emission control part, temp. change recording part, and thermal characteristics calculation part. The heat generated in the specified time from the heat emitting bodies 10 is diffused into an object to be inspected, and after a certain transmission delay time, the peak value in temp. rising speed appears in the position of the thermometer 30. The temp. change recording part records the changes with time in the temp. measurement and determines the peak value and the peak time of the temp. rising speed. The thermal characteristics calculation part computes the volume heat capacity, thermometric conductivity, and thermal conductivity.;COPYRIGHT: (C)1997,JPO