Research On Key Mechanical Characteristics Of Microchannel Hydrogen Sensor

Hydrogen gas is an inexhaustible clean energy, also the important chemical raw materials. Because of the advantages, it gets more and more extensive development and application. However, the character of hydrogen is highly flammable and explosive. In order to ensure the hydrogen fuel use, transfer and storage, the development of the high sensitivity sensor to detect hydrogen in low concentration and to monitor gas leak is of great significance.According to the actual demand and the current research status of Suspended Microchannel Resonator, a microchannel hydrogen sensor and the method to detect trace hydrogen are put forward. The model of microchannel hydrogen sensor is established and the operating principle is stated.Differential equations of lateral movement are derived through Newton's method. With the dynamic model of microchannel, the relationship among dynamic characteristics and structure size, fluid-structure interaction, gas pressure, flow velocity and thickness of Pd membrane. It's a good reference to improve the sensitivity and quality resolution.The structure parameters are optimized based on the in-depth analysis between quality resolution and structure size, which lay a good foundation for sample preparation and experiment.The finite element simulation of microchannel model is established with ANSYS software and used to analyse the influence to dynamic characteristics. The simulation result is consistent with the theoretical model, which further confirms that the measurement of trace hydrogen based on natural frequency changes with the absorbed hydrogen is feasible.