基于FPGA的核磁共振录井仪智能温控系统的研制  

Development of an Intelligent Temperature Control System for NMR Logging Instrument Based on FPGA

作　　者：蔡剑华[1] 胡惟文[1] 

机构地区：[1]湖南文理学院信息研究所,湖南常德415000

出　　处：《核电子学与探测技术》2013年第10期1285-1288,共4页Nuclear Electronics & Detection Technology

基　　金：湖南省自然科学基金项目(12JJ4034);湖南文理学院博士启动项目(BSQD1008);湖南省重点建设学科-光学基金

摘　　要：根据核磁共振录井仪磁体对温度场的要求,研制了一种基于FPGA的智能温控系统,给出了系统结构、工作原理和软件控制流程,并对应用效果进行了实验研究。温控系统采用PID算法控制,测量灵敏度为0.05℃,控制误差为±0.2℃,其良好的稳定性,很好地满足了均匀磁场对温度的要求。实际应用结果表明:温控及仪器系统运行稳定,测量结果可靠,仪器测量的稳定性,标定曲线的线性度都达到了要求,为核磁共振录井的准确测量提供了保证。According to the request of temperature field for the nuclear magnetic resonance （NMR） logging in- strument, an intelligent temperature control system is developed based on FPGA. The system structure, working principle and control procession of software are given. And the effect on the applications is studied through ex- periment. Temperature control system is controlled by PID algorithm. The sensitivity is 0.05 ℃, the control er- ror is± 0.2℃. Its good stability meets well the requirements of the uniform magnetic field for temperature. Practical application results show that the temperature control system and instrument run stably and the measur- ing results are reliable. The stability of the measuring instrument and the linearity of calibration curve meet the requirement. These provide a guarantee for accurate measurements with NMR logging.

关 键 词：现场可编程门阵列 核磁共振录井仪 温控系统 比例积分微分算法 

分 类 号：P631[天文地球—地质矿产勘探]