土工筋带变形测试传感器研发与试验研究

工程上,土工加筋带变形测试一直是个难题,主要是因为其应变较大且加筋带外层是相对较软的聚合物结构.利用纳米导电炭黑颗粒充填聚合物获得敏感材料,再通过印刷技术将其印刷在塑料薄片上,制作成传感元件.通过拉伸试验测试了四种不同底板传感元件的传感性能,试验结果表明,四种元件均具有拉伸敏感性,电阻值随拉伸应变的增大而增大,且满足模量匹配与较大应变要求.对比分析发现,PVC底板传感元件的综合性能最佳,适合作为土工筋带变形测试元件使用.另外,这种方法制作的传感元件可批量化生产,无需逐个标定,极大地提高了它的实用性.

Experimental research on deformation test sensor of geotextile reinforcement tape

The deformation test of geotextile reinforcement tape is always a problem which mainly due to the strain is large and the outer layer of tape is soft polymer structure in engineering. The sensitive materials were obtained by polymer filled with nano-particles conductive carbon black. The plastic sheets were printed on the material by print?ing technology and made into sensing elements. The sensing properties of four different plate sensors were tested by tensile tests. The results showed that four kinds of elements at the same time having a tensile sensitivity that the re?sistance value increases with strain,and meet with the requirements of greater strain and modulus matching. The PVC sensor element's overall performance was best and which was more suitable for the deformation test of geotex?tile reinforcement tape according to comparative analysis. In addition,the developed sensor can be mass production and the sensor does not need to be individually calibrated.