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随着超导、高能物理、宇航以及液化天燃气燃料工业等技术的发展,测量结构或部件在低温和超低温条件下应力的要求更为迫切。尽管目前国外已有多种市售的低温应变片,但是,应用低温应变片进行实际部件的应力测量方面的资料至今还很少见。目前进行低温应变测量的试验大致有:(1)液化天燃气(LNG)用的低温高压容器的强度测量;(2)结构部件(火箭液氢液氧燃料貯箱)在低温下的强度测量,
With the development of technologies such as superconductivity, high-energy physics, aerospace and liquefied natural gas fuel industry, it is more urgent to measure the stress of structures or components under the conditions of low temperature and ultra-low temperature. Although a variety of commercially available low temperature strain gauges are currently available abroad, information on the measurement of actual stress of low temperature strain gauges is still rare. The current low temperature strain measurement tests are generally: (1) liquefied natural gas (LNG) used in low temperature and pressure vessel strength measurement; (2) structural components (rocket liquid hydrogen liquid oxygen fuel tank) at low temperature strength measurements,