| 基于超声导波的变温管道壁厚监测方法 |
| Monitoring method for wall thickness of variable-temperature pipelines based on ultrasonic guided waves |
| 投稿时间：2025-04-25 修订日期：2025-05-20 |
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| 中文摘要: |
| 针对石化高温管道运行中因温度波动导致超声测厚精度下降的问题，提出一种基于超声导波信号反演温度并对壁厚进行补偿的测量方法。首先，建立二维稳态传热模型，解析波导条温度场分布，构建超声飞行时间预测模型，表征管道温度和波导中超声飞行时间的定量关系，实现高温管道温度的实时测量。然后，设计并搭建超声导波实验平台，开展500℃范围内的超声导波测量实验，通过超声导波测量的管道温度对超声导波测厚数据进行实时温度补偿。实验结果表明：在15-500℃范围内，该方法可以实现对管道温度变化的精确测量，基于声速实时补偿后的壁厚测量误差为±0.1 mm。该方法突破了现有导波测厚装置在变温环境中的应用瓶颈，为石化装置安全运行提供了可靠的壁厚监测方案。 |
| 英文摘要: |
| Aiming at the problem of the decline in the accuracy of ultrasonic thickness measurement caused by temperature fluctuations during the operation of petrochemical high-temperature pipelines, a measurement method based on the inversion of temperature and the compensation of wall thickness by ultrasonic guided wave signals is proposed. Firstly, a two-dimensional steady-state heat transfer model is established, the temperature field distribution of the waveguide strip is analyzed, an ultrasonic flight time prediction model is constructed, the quantitative relationship between the pipe temperature and the ultrasonic flight time in the waveguide is characterized, and the real-time measurement of the temperature of high-temperature pipes is achieved. Then, the ultrasonic guided wave experimental platform was designed and built, and the ultrasonic guided wave measurement experiment within the range of 500℃ was carried out. The real-time temperature compensation of the ultrasonic guided wave thickness measurement data was conducted through the pipe temperature measured by the ultrasonic guided wave. The experimental results show that within the range of 15-500℃, this method can achieve precise measurement of the temperature changes of the pipeline. The measurement error of the wall thickness after real-time compensation based on the speed of sound is ± 0.1mm. This method breaks through the application bottleneck of the existing guided wave thickness measurement devices in variable-temperature environments, providing a reliable wall thickness monitoring scheme for the safe operation of petrochemical plants. |
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| 中文关键词: 超声导波 变温管道 壁厚测量 温度补偿 |
| 英文关键词:ultrasonic guided wave Variable temperature pipeline wall thickness measurement temperature compensation |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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