基于压力传感器的脉冲微波量热计

Pulsed microwave calorimeter with pressure sensor

设计了一种基于固定体积液体吸收微波能量后温度升高、压力增大原理的脉冲微波量热计.采用纯水作为吸收介质,压阻传感器作为传感装置,具有对液体热学性能参数要求低、量程大和灵敏度高的优点.实验结果表明:该型量热计的能量分辨率为0.5J,量程大于180J,证明了该方法用于大功率脉冲微波能量测量的可行性.同时,在对吸收腔体表面的场分布进行优化设计后,也可用于高功率微波能量测量,为用于高功率微波能量测量的量热计设计提供了一种新的技术思路.

Based on measuring the pressure increment of liquid that results from heating by the absorbed microwave energy,a calorimeter with pressure sensor is designed.Pure water is used as the absorbing material.The calorimeter has advantages of less requirements on the thermodynamic parameters of liquid,wide measurement range and high sensitivity.The experimental results indicate that the calorimeter can be used to measure pulsed microwave energy,and the energy resolution and measurement range of which are 0.5Jand 180 J,respectively.Meanwhile,with careful electromagnetic simulation of calorimeter cavity,the calorimeter can also be used to measure the high power microwave energy.