Temperature measuring method using temperature-sensitive magnetic substance and temperature controlling method

A temperature measuring method comprising the steps of:

• arranging in a portion to be measured a plurality of temperature-sensitive magnetic substances respectively having arbitrary different Curie points;
• generating a magnetic field from a magnetic field generation source disposed at a position away from the portion to be measured;
• and
• detecting a change of the magnetic flux vector of the magnetic field depending on the temperature of the temperature-sensitive magnetic substance by a magnetic sensor disposed between the temperature-sensitive magnetic substance and the magnetic field generation source, whereby the temperature of the portion to be measured is measured.

A temperature controlling method comprising the steps of:

• arranging in a portion to be measured a temperature-sensitive magnetic substance having an arbitrary Curie point;
• heating the portion to be measured by a heating device;
• generating a magnetic field from a magnetic field generation source disposed at a position away from the portion to be measured;
• detecting a change of the magnetic flux vector of the magnetic field depending on the temperature of the temperature-sensitive magnetic substance by a magnetic sensor;
• and
• controlling the heating device according to a detection signal from the magnetic sensor.

A temperature controlling system comprising:

• a temperature-sensitive magnetic substance arranged in a portion to be measured and having an arbitrary Curie point;
• a detecting portion which generates a magnetic field in a position away from the portion to be measured and detects a change of the magnetic flux vector of the magnetic field depending on the temperature of the temperature-sensitive magnetic substance;
• a heating portion which heats the portion to be measured;
• and
• a controlling portion having a computer which controls the heating portion according to a detection signal obtained from the detecting portion.