为了控制铝熔体中氢含量，在线检测方法的原理及特点。从测氢操作方式、测氢结果、测试时间和成本的角 度对各种在线测氢方法进行了对比分析。 在线连续测氢技术发展方向主要在于延长高温测氢探头使用寿命、降低装置 总体成本。

In order to control the content of hydrogen in aluminum melt, the principle and characteristics of various on-line methods for measuring the content of hydrogen in aluminum melt, such as vacuum solidification method, first bubble method, inert gas cycle method and hydrogen concentration difference cell method, were reviewed respectively according to the different operation methods. Various on-line hydrogen measurement methods were compared and analyzed in terms of operation mode, test results, test time and cost. The development direction of on-line continuous hydrogen measurement technology is mainly to extend the service life of high-temperature hydrogen measurement probe and reduce the overall cost of the device.