| 摘要 |
PURPOSE:To improve heat-sensitivity by providing an annular magnetic bimetal with a gap and an inductance coil. CONSTITUTION:A magnetic body 2 with a small temperature coefficient and a magnetic body 3 with a large temperature coefficient are used to form an annular magnetic bimetal 1. The annular magnetic bimetal 1 is provided with a gap 4 and a coil 5 wound thereon. When the annular magnetic bimetal senses heat, the bimetal 1 is curved and spacing (d) of the gap is shortened because of the difference in temperature coefficient between both the magnetic bodies 2, 3, and the inductance of the coil 5 changes. By measuring or utilizing the change in the coil output as the result of the change in the inductance, it becomes possible to quickly sense the temperature change. |
