基于电涡流传感器的油罐车腐蚀检测

发布时间：2018-05-27 15:39

本文选题：油罐车 + 腐蚀检测　；参考：《昆明理工大学》2015年硕士论文

【摘要】：随着我国国民经济的高速发展,石油及石油制品已经慢慢成为主要的能源及化工原料。我国现在主要的原油运输有两种,一种是输油管线；另一种则是油罐车运输。由于运输的原油中往往含有硫酸、氢、有机盐和无机盐以及水分等具有腐蚀性的化学物质,加上储油罐外壁受周围环境因素的影响,储油罐的寿命将会大大减少。如果不能及时的对储油罐进行腐蚀检测,并对有腐蚀情况的储油罐进行处理,后果将非常严重,轻则影响油品质量,重则会造成油品泄露,环境污染,而且容易造成火灾和爆炸。按照调查数据显示,世界上工业发达的国家因储油罐腐蚀造成的经济损失约占当年国民生产总值的1.8%—-4.2%；我国每年因为腐蚀引起的损失估计达5000亿元,约占国民经济生产总值的5%。因此,对储油罐的腐蚀检测具有非常重要的意义。本文按照已有的各种针对腐蚀检测的传感器的特点进行分析,设计并研制了一种用于储油罐腐蚀检测的电涡流传感器。首先,因此油罐车罐体的尺寸太大,本文将其网格划分成了许多块20×20(mm),厚度为5mm的碳钢板,然后对油罐车的涡流检测原理进行了分析,并对电涡流传感器进行了等效电路分析,并按照等效电路研究了线圈和被测材料的各参数对检测结果的影响。然后根据激励线圈和检测线圈在检测系统中作用的不同,确定了它们的形状和电涡流传感器结构,并通过有限元分析确定了激励线圈和检测的尺寸,接着对罐体金属材料的属性和趋肤深度研究,得出了本论文电涡流传感器的激励频率。然后通过计算,得到了激励线圈和检测线圈的漆包线线径和匝数,并且根据线圈的尺寸设计骨架和外壳。其次,根据分析结果设计并制作了探头线圈以及激励探头线圈的信号发生器,并按照输出信号,设计了传感器的后置电路并进行了仿真。然后对具体的不同深度腐蚀情况的试件进行了测试,得出测试结果并记录分析。
[Abstract]:With the rapid development of China's national economy, petroleum and petroleum products have gradually become the main energy and chemical raw materials. There are two main types of crude oil transportation in China, one is pipeline, the other is tanker transportation. Due to the corrosive chemical substances such as sulfuric acid, hydrogen, organic salt, inorganic salt and water in the transported crude oil, the life of the oil storage tank will be greatly reduced due to the influence of environmental factors on the outer wall of the oil storage tank. If it is not possible to detect the corrosion of the oil storage tank in time, and to deal with the oil storage tank with corrosion, the consequences will be very serious. The light will affect the quality of the oil product, and the heavy will cause oil leakage and environmental pollution. And easy to cause fire and explosion. According to the survey data, the economic losses caused by the corrosion of oil storage tanks in industrialized countries in the world accounted for about 1.8-4.2 percent of the GNP in that year. The losses caused by corrosion in China are estimated at 500 billion yuan each year. It accounts for about 5% of the gross national product. Therefore, it is of great significance to detect the corrosion of oil storage tanks. In this paper, according to the characteristics of various kinds of existing sensors for corrosion detection, a eddy current sensor for oil tank corrosion detection is designed and developed. First of all, the size of the tank is too large. In this paper, the grid is divided into many carbon steel plates with a thickness of 5mm and 20 脳 20mm, then the eddy current detection principle of the tank is analyzed, and the equivalent circuit of the eddy current sensor is analyzed. According to the equivalent circuit, the influence of the parameters of the coil and the tested material on the test results is studied. Then according to the different function of the excitation coil and the detection coil in the detection system, the shape and the structure of the eddy current sensor are determined, and the size of the excitation coil and the detection coil are determined by the finite element analysis. Then, the characteristics and skin depth of metal materials are studied, and the exciting frequency of eddy current sensor is obtained. Then the diameter and turns of the enamelled wire of the exciting coil and the detecting coil are obtained, and the skeleton and shell are designed according to the size of the coil. Secondly, according to the analysis results, the signal generator of probe coil and excitation probe coil is designed and manufactured. According to the output signal, the post-circuit of sensor is designed and simulated. Then, the concrete specimens with different corrosion depth were tested, the test results were obtained and the analysis was recorded.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE988;TP212

【参考文献】