This paper presents the design and simulation of a pressure sensor integrated with two identical hall effect sensors and permanent magnets arranged in a differential configuration for measuring pressure in the range of 0–20 bar. The sensor uses the deflection of a circular diaphragm with a simple rigid mechanical structure to convert the applied pressure to a differential hall voltage output. A complete analytical modelling was carried out by assuming the rigid mechanical structure as a central circular boss structure on the circular diaphragm. Numerical simulations were also carried out in COMSOL Multiphysics FEM tool to support the analytical results. Before going for actual fabrication, the optimum sensor dimensions were also fixed from both analytical modelling and numerical simulation analysis. The sensor was planned to be fabricated completely using different grades of stainless steel and hence can be used in high temperature and corrosive environments. The fabricated sensor can be of low cost, self-packaged and the differential arrangement helps in compensating for any ambient temperature variations.

本文介绍了压力传感器的设计和仿真，该压力传感器集成了两个相同的霍尔效应传感器和永磁体，它们以差分配置布置，用于测量0–20 bar的压力。该传感器使用具有简单刚性机械结构的圆形膜片的偏转将施加的压力转换为差分霍尔电压输出。通过假定刚性机械结构为圆形膜片上的中心圆形凸台结构，可以进行完整的分析建模。为了支持分析结果，还使用COMSOL Multiphysics FEM工具进行了数值模拟。在进行实际制造之前，还应根据分析模型和数值模拟分析确定最佳传感器尺寸。该传感器计划完全使用不同等级的不锈钢制成，因此可以在高温和腐蚀性环境中使用。所制造的传感器可以是低成本的，自包装的，并且差动布置有助于补偿任何环境温度变化。