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一、温度对测量影响的理论分析我们都知道,绝大多数物质具有热胀冷缩的性质。固体在温度升高时,其各种线度(如长度、宽度、厚度、直径等)都要增长,这种现象叫做固体的线膨胀,它是衡量材料热膨胀大小的性能指标,线膨胀系数大的材料在受热时尺寸变化较大,反之则较小。实验表明:在温度变化不大时,固体在某一方向上的伸长量与温度的增加量成正比,且与物体的原长成正比。
First, the temperature on the measurement of the theoretical analysis We all know that the vast majority of materials have the nature of thermal expansion and contraction. Solid in the temperature rise, its various degrees (such as length, width, thickness, diameter, etc.) should be increased, this phenomenon is called solid linear expansion, which is a measure of the material thermal expansion of the performance index, the coefficient of large linear expansion The material changes in size when heated, otherwise smaller. Experiments show that when the temperature changes little, the elongation of the solid in one direction is proportional to the increase of the temperature, and it is proportional to the original length of the object.