固体热胀冷缩机理探究与新型综合演示仪的研制

Research and development of new-type colligation demonstration meter on the mechanism of thermal expansion and contraction of solid

固体热胀冷缩实验一般都采用“金属环＋金属球”进行演示。该文在从微观角度探究了热胀冷缩物理变化过程机理的基础上，借用固体热胀冷缩特性作为“激光电路系统的通断控制”开关，并利用“光路的微小放大作用”显现热胀冷缩的效果，从而研制出一款新型固体热胀冷缩综合演示仪，在演示效果的显著程度和知识的综合性、创造性和挑战性方面都有实质性突破。

Generally , a demonstrative meter of thermal expansion and contraction of solid is made of ＂a metallic hoop and a metallic ball＂, merely with ordinary demonstration effect. Based on the exploration of physical change process of thermal expansion and contraction of solid from a microscopic view, a new synthesis- demonstration meter of thermal expansion and contraction of solid is introduced, which uses thermal expansion and contraction of solid as switch to control laser circuit, and applies the amplification function of the light path to demonstrate the effect of thermal expansion and contraction. Different from the traditional meters, through this meter a virtual improvement in both ＂the notability of demonstrative effect＂ and ＂ the possession of synthetic knowledge and creativity＂ was made.