当前,结构上使用的阻抗式应变计中,最小测定基尺仅有几毫米的电阻式应变计被用来测定作用力或应力。这些应变计被贴在模型上,为防止脱落,因而只能在胶干了之后才能使用,要等几个小时之后才能开始试验,并且不能重复使用。 为实现快速测试和避免应变计仅用一次之后就不能再用,作者所在试验室使用一种接触式应变计,为测得精确的应力值,这种应变计的测定值从0.5毫米计起,该仪器的重量仅有 Currently, resistive strain gauges, which are structurally used, have resistive strain gages that measure only a few millimeters in their smallest dimension to determine force or stress. These gauges are attached to the model and can be used only after the glue has dried to prevent it from falling off. It will take several hours before starting the test and can not be reused. In order to achieve rapid test and to avoid the strain gauge can not be used after only one time, the author’s laboratory use a contact strain gauge, to measure the exact stress value, the strain gauge measured from 0.5 mm, The weight of the instrument is only