【摘要】 对磁动式测氧仪的测量池、光路和数据采集系统进行了研究。从气体磁性推导出了哑铃球在非均匀梯度磁场中受到的转动力矩公式,给出测量池系统的设计方案,采用镀银刻蚀方案实现哑铃球系统的转动阻尼,分析了非均匀梯度磁场系统的技术要求。介绍线阵CCD光点位置探测光路和CCD数据采集与处理电路系统。为满足仪器定标、温度补偿和校正的需要,设置了五个功能按键,列表说明其功能。给出了仪器的校正方案和检测数据。实验结果表明:仪器在不同的温度点测量精度均可达0.2%以上,仪器的温度补偿性能、精度和稳定性达到了设计要求。更多还原

【Abstract】 Research is done on the measuring cell,light path and data acquisition system of a magnetomotive oxygen measuring instrument.Base on the magnetic performance of gas,the moment of rotation of a dumbbell is derived when it is in a nonuniform magnetic field.A design of the measuring cell is proposed,a rotary resistance for the dumbbell ball is implemented by a silver-coated erosion approach,and the techinque requirements are analyzed for the nonuniform gradient magnetic field.The light path and the CCD data acquisition system are introduced.To meet the requirements for instrumental scaling,temperature compensation and correction,five functional keys are set up,and their function are explained by list.The correction programme of the instrument and test data is given later on.Experiments results show that the precision of the instrument is above 0.2% at different temperature,the performance of temperature compensation,the precision and stability of the instrument satisfy the design requirements.更多还原