仪表技术与传感器
儀錶技術與傳感器
의표기술여전감기
INSTRUMENT TECHNIQUE AND SENSOR
2015年
2期
39-42,84
,共5页
管道腐蚀%电化学阻抗谱%数字相关算法%恒电位仪
管道腐蝕%電化學阻抗譜%數字相關算法%恆電位儀
관도부식%전화학조항보%수자상관산법%항전위의
pipeline corrosion%electrochemical impedance spectroscopy%digital correlation algorithm%potentiostat
采用线性极化、电化学阻抗谱和法拉第定律相结合的方法，利用FPGA、STM32、DDS信号发生器、恒电位仪、三电极系统，设计了一种包括双通道同步高速采集电路、电子标签和U盘的准确计算石油管道内壁腐蚀速度的仪器，系统采用数字相关积分算法来计算阻抗谱的幅值和相位，电路中双通道低通滤波器提高了系统的信噪比，实现了高精度阻抗测试。测试仪通过GPRS实现与远端监控系统实时数据传输。通过对比试验，该仪器与CHI660D的测量结果基本一致，腐蚀速度测量范围为1×10－4～50 mm／a。
採用線性極化、電化學阻抗譜和法拉第定律相結閤的方法，利用FPGA、STM32、DDS信號髮生器、恆電位儀、三電極繫統，設計瞭一種包括雙通道同步高速採集電路、電子標籤和U盤的準確計算石油管道內壁腐蝕速度的儀器，繫統採用數字相關積分算法來計算阻抗譜的幅值和相位，電路中雙通道低通濾波器提高瞭繫統的信譟比，實現瞭高精度阻抗測試。測試儀通過GPRS實現與遠耑鑑控繫統實時數據傳輸。通過對比試驗，該儀器與CHI660D的測量結果基本一緻，腐蝕速度測量範圍為1×10－4～50 mm／a。
채용선성겁화、전화학조항보화법랍제정률상결합적방법，이용FPGA、STM32、DDS신호발생기、항전위의、삼전겁계통，설계료일충포괄쌍통도동보고속채집전로、전자표첨화U반적준학계산석유관도내벽부식속도적의기，계통채용수자상관적분산법래계산조항보적폭치화상위，전로중쌍통도저통려파기제고료계통적신조비，실현료고정도조항측시。측시의통과GPRS실현여원단감공계통실시수거전수。통과대비시험，해의기여CHI660D적측량결과기본일치，부식속도측량범위위1×10－4～50 mm／a。
By means of linear polarization, electrochemical impedance spectroscopy and Faraday's law, an instrument for pre-cisely calculating petroleum pipeline internal corrosion rate based on STM32 and FPGA was designed in this paper.It included a direct digital signal synthesizer, dual channel synchronic high-speed data acquisitions circuit, electronic tags and U disk.The dig-ital correlation algorithm was applied to calculate amplitude and phase of the impedance spectroscopy, and the bi-channel low-pass filters were integrated in circuit to improve the signal to noise ratio and get precisely impedance spectroscopy, while instru-ment transmitted data to monitoring system by GPRS.Through comparative experiment, the measurement result of this instrument is similar to that of CHI660D, and the corrosion rate measurement range is 1×10-4~50 mm/a.
