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长度计量中的实物标准器,不管是多值的刻线尺——玻璃短标尺、金属米尺、精密钢带尺、标准殷钢基线尺,还是端面尺——量块、量杆等,它们的长度都是随着温度的变化而变化的。由于检定尺子长度时的温度不一定与使用时的温度条件完全相同,若要准确得到尺子在不同温度下的长度,必须在检定和使用尺子的过程中认真考虑温度修正。所以精确测定尺长随温度变化的线膨胀系数;精确测定尺子的温度是必不可少的。但是对于正确应用尺长的温度修正方程式也不应忽视。在我们所接触到的业务工作中有这样的实例:把标准尺的尺长的温度修正方程式用错了,却怀疑长度检定值不正确;也有因为尺长的温度修正方程式的表达形式不同,使用部门还以为检定部门写错了方程式,就自己把
Physical standards in length gauging, whether they are multi-valued ruler - glass ruler, metal ruler, precision steel ruler, standard invar base ruler, end ruler - measuring block, measuring rod etc. The length varies with temperature. Since the temperature of the ruler is not necessarily the same as the temperature at the time of use, in order to accurately obtain the length of the ruler at different temperatures, the temperature correction must be carefully considered in the verification and use of the ruler. Therefore, the precise determination of the length of the linear expansion coefficient of temperature changes; accurate determination of the temperature of the ruler is essential. However, correct temperature correction equations should not be ignored. There are examples of business practices that we have come to contact with: using the temperature correction equation for the standard length of a ruler in the wrong way, but doubting the length verification value is incorrect; and because of the different forms of temperature correction equations for the length of the ruler, The department also thought that the verification department wrote the wrong equation and put it on its own