What is the working principle of bimetallic thermometer?

Bimetallic thermometer principle is applied thermal expansion principle of temperature measurement, belong to solid expansion thermometer. Bimetallic thermometer based on solid heat expansion principle, measuring temperature is usually put the two pieces of expansion coefficient difference is relatively large pieces of metal stitch welding together, constitute a bimetallic temperature sensing element. When the temperature changes, because the bimetallic strip of the materials of the two different linear expansion coefficient is relatively large, produce different expansion and contraction, leading to the curving deformation of bimetallic strip. As there are different according to different deformation amount of momentum transfer, the amount of rotation drive connection shaft, shaft drive at the other end of the indicating needle, indicating pointer is just on the correct reading, indicate the temperature.

双金属温度计基于热膨胀的原则,是一种固体膨胀式温度计。 双金属温度计基于固体热膨胀的原则。 测量的温度通常是叠加在两块金属板相对较大的膨胀系数的差异,形成了一个双金属温度传感器。 当温度变化时,线性膨胀系数的差异两种不同材料的双金属板之间的相对大而产生不同的扩张和收缩,导致双金属板的弯曲变形。 不同的旋转量是根据生产数量不同的变形。 的旋转驱动轴连接,转轴驱动针的另一端,这样的指针可以表明温度对正确的阅读。