基于介电常数调制的曲面雷达罩蜂窝积水传感器设计

研制了一种基于介电常数调制的曲面雷达罩的蜂窝积水传感器。介电常数表示电介质在电场中贮存静电能的相对能力,而水的介电常数又远远大于空气和雷达罩材料的介电常数,因此可以利用介电常数调制法来检测雷达罩的蜂窝积水。为保证测试灵敏度,设计的传感器极板必须贴紧被测结构,而雷达罩外形决定了极板应该采用柔性的、可以贴合曲面的探头结构形状。采用多极片之间用铜条焊接的方法构成传感器探头,并利用ANSYS仿真分析对结构进行了设计优化。通过对蜂窝结构的曲面雷达罩积水实验验证,结果证明该传感器可以实现雷达罩蜂窝积水的检测,具有较高的测试灵敏度和重复性。

Design of sensors for measuring water in curved surface radome honeycomb based on the dielectric constant modulation

The sensors for measuring water incurved surface radome honeycomb based on the dielectric constant modulation is developed. The dielectric constant indicates the relative capacity of the dielectric to store the electrostatic energy in the electric field. The dielectric constant of water is much larger than the dielectric constant of air and materials of radome, so it can be used to detect the cellular water of radome by the method of the dielectric constant modulation. In order to ensure the test sensitivity, the sensor plates must be closely attached to the measured structure. The shape of radome determines that the plate should be a flexible structure, which can fit the shape of curved surface, the sensor probe is composed of multi plates with a copper bar welding method, and the structure is optimized by using ANSYS software. Through testing the water of honeycomb structure, the experimental results show that the sensor can realize the water detection of honeycomb structure, and has high test sensitivity and repeatability.