中文摘要：

针对斜拉桥工程结构高精度、高灵敏、高稳定性的检测要求，设计制备了一种多层磁电复合材料的新型索力传感器。在磁致伸缩材料尺寸最优条件下，运用环氧树脂、银导电胶粘结技术和涂胶厚度控制技术，使Terfenol-D合金与PMN—PT压电晶体、两个电极片与压电晶体均匀粘结固化，制备成层状磁电复合材料。采用漏磁场小、抗干扰好的磁回路结构设计，通过有限元方法获得复合材料驱动磁场和偏置磁场的工作范围。并在拉力试验机上进行了传感器动态性能试验。研究表明，新型索力传感器精度提高1％，响应时间最大减少50％，适合于复杂多变环境下斜拉桥索力的精确可靠检测。

英文摘要：

For the cable-stayed bridge engineering structures has testing requirements of high accuracy, high sensitivity and high stability, a new cable tension sensor with multilayer magneto-electric composite material is designed and manufactured In the case of the magnetostrictive material under the condition of the optimal size, using the epoxy resin, silver conductive adhesive and coating thickness control technology, the Terfenol-D alloy and the PMN-PT piezoelectric crystals, as well as the electrodes and the piezoelectric crystal, are evenly adhered and solidified, which is the prepared layered magneto-electric composite materials. Using the small leakage magnetic field and the good anti-jamming structure design of magnetic circuit, the finite element method is used to obtain the composite materials of driving magnetic fieM and the bias＇ magnetic fieM normal working range. The dynamic performance test of sensor in a tensile testing machine is carried out. The studies show that, compared with the traditional magnetic flux sensor, the precision of the new cable force sensor is increases by 1%; the maximum response time reduces by 50%. It is suitable for accurate and reliable test of cable-stayed bridge under the complicated and changeable environment.