基于PIC24单片机井下温度探测电路系统设计  

Design of downhole temperature detection circuit system based on PIC24 microcontrollers

作　　者：王冠军[1] 李楠楠[1] 叶欣[1] 刘军宁 

机构地区：[1]光电油气测井与检测教育部重点实验室(西安石油大学),陕西西安710065 [2]大庆钻探集团地质录井一公司,大庆613411

出　　处：《电子测试》2012年第7期34-38,47,共6页Electronic Test

基　　金：陕西省科学技术研究发展计划资助项目(2010K07-22)

摘　　要：在油气开发与探测中,井下温度是评价井下地层信息的重要参数。本文设计了基于单片机PIC24FJ128GA010的井下温度实时探测系统,详述了井下温度探测系统硬件的总体结构,着重阐述了井下温度采集系统的软件和硬件设计及实现方法。在系统中,温度探测探头选用高精度铂电阻,这种铂电阻具有高精度、高灵敏性、高稳定性等特点。本系统应用于井下温度测量,由于电阻率与温度关系密切,这样获取的温度数据就为评价地层电阻率提供另一重要依据。通过实验,该系统的可靠性与准确性以及高速数据采集和数据处理的功能已得到验证,完全可以满足现场对井下温度探测的需求。In the oil and gas development and exploration, downhole temperature is an important parameter of evaluation of the underground strata information. Designed a real - time detection system based on the microcontroller PIC24FJ128GA010 downhole temperature, detailing the overall structure of the downhole temperature detection system hardware, focusing on the downhole temperature acquisition system software and hardware design and its implementation. In the system, the temperature detection probe selected precision platinum resistance, this platinum resistance with high-precision, high-sensitivity, high stability. The system used in downhole temperature measurements, due to the close relationship between resistivity and temperature, so temperature data obtained provide another important basis for the evaluation of formation resistivity. Through experimentation, the system reliability and accuracy, as well as high-speed data acquisition and data processing functions have been tested and fully meet the needs of the site of the underground temperature detection

关 键 词：井下温度测量 PIC单片机 仪表放大器 PT100 

分 类 号：TH811[机械工程—仪器科学与技术]