论文部分内容阅读
火电站锅炉炉膛管道泄漏严重危害电站的安全和经济运行。目前的炉膛泄漏定位方法的定位精度低,导致工作量大,因此引入声学测量法,优点在于其可用于高温环境、利于在线实时监测、可远程监测。在声学测量的基础上引入基于立体阵列的球型插值法(SI),该算法的定位精度较高并且运算量小。基于SI算法的前提下,选用的立体阵列的定位精度远远高于平面阵列。同时首次采用基坐标变换法来避免理论中负时延值的出现,实际测量中,无法测得负时延值。使用上述方案能有效提高定位精度,基本能保持现场的定位误差在1m以内,可大大减小查缺工作量,缩短停炉时间,带来可观的经济效益。
Furnace pipe leakage in thermal power station seriously jeopardizes the safety and economic operation of the power station. The current positioning method of furnace leaks has low positioning accuracy and leads to a heavy workload. Therefore, the introduction of acoustic measurement method has the advantage that it can be used in high-temperature environment, facilitates on-line real-time monitoring and can be remotely monitored. Based on the acoustic measurement, spherical array interpolation (SI) based on stereo array is introduced. The algorithm has high positioning accuracy and low computational complexity. Based on the SI algorithm under the premise of the use of three-dimensional array positioning accuracy is much higher than the planar array. At the same time, the first time using the base coordinate transformation method to avoid the appearance of negative delay in theory, the actual measurement, can not be measured negative delay value. The above scheme can effectively improve the positioning accuracy, and can basically keep the on-site positioning error within 1m, which can greatly reduce the workload of checking and shortening the shutdown time and bring considerable economic benefits.