【摘要】 研制成功一种超小型便携式质谱计。仪器能够在野外现场测定样品中的氮气和氢气浓度及二者的比值,已经用于首都圈(河北省、天津市和北京市)地区20处地下流体流动观测点地下水、断层气样品的测定工作。测定数据按照测定点的经纬度、测定点名称、测定号、测定日期和时间保存。利用计算机将数据从仪器中取出进行编辑与处理。各种供电采用了DC-DC的模块,简化了由变压器整流滤波的供电方式。仪器具有灵敏度高,操作简便,稳定性好、数字显示、测定过程由单片机控制及便于携带的特点。更多还原

【Abstract】 Based on mass spectrometric technique,a portable helium measurement instrument was developed.It can perform in-situ measurement of concentrations of helium and hydrogen in samples and their ratios at field observation points.The measurement process is controlled by a single chip computer.The power supply is provided by a DC-DC module.The measurement results are displayed digitally and the data are a- ble to be stored according to latitude and longitude of measurement point,measurement location,measure- ment number,and measurement date and time.These data are edited and processed with computer.The instrument has already been used for detecting concentrations of helium and hydrogen in samples of under- ground hot waters and geological fault gases from 20 observation points of Hebei province,Tianjin and Beijing.The instrument is sensitive,easy-to-operate and stable.更多还原