去年我们在研制700℃半桥式陶瓷喷涂应变片的过程中,遇到了灵敏系数分散、重复性差和蠕变大等问题。为了分析原因,曾用U529胶粘贴未喷涂的应变片,制成半桥式粘贴应变片(暂名BNG-650型),在与喷涂片相同的条件下进行了对比试验。今年因某产品高温应变测试需要及喷涂片尚未搞成的缘故,又进一步摸索半桥式粘贴应变片。从迄今的试验结果看,可望用于650℃下静态应变测试,现正在和使用部门一起作现场实测的准备。下面将实验室里研制阶段的工作加以简单小结。 Last year we developed 700 ℃ half-bridge ceramic spray strain gauge, met the dispersion of the sensitivity coefficient, poor repeatability and creep problems. In order to analyze the reasons, we used U529 glue uncoated strain gauge to make the half-bridge adhesive strain gauge (tentative name BNG-650 type). The contrast test was carried out under the same condition as the sprayed sheet. This year due to a product of high temperature strain test needs and spray film has not yet been done for the sake of further exploration of half-bridge paste strain gauge. Judging from the test results to date, it is expected to be used for the static strain test at 650 ° C, and it is now ready to be field tested together with the user department. The following laboratory work in the development phase to a brief summary.