The invention discloses an electromagnetic guided wave excitation device for steel rail flaw detection and a flaw detection method.The electromagnetic guided wave excitation device comprises a guided wave excitation piece arranged on a steel rail, and the guided wave excitation piece comprises a shell; a permanent magnet, a magnetic conductive sheet, a first insulating layer, a reverse inflection coil, a second insulating layer, a forward inflection coil and a third insulating layer are sequentially arranged in the shell from top to bottom. According to the electromagnetic guided wave excitation device for steel rail flaw detection and the flaw detection method, through cooperation of the shell, the permanent magnet, the magnetic conductive sheet, the first insulating layer, the reverse inflection coil, the second insulating layer, the forward inflection coil and the third insulating layer, an alternating Lorentz force in a dynamic magnetic field acts to excite guided waves in a steel rail according to an electromagnetic guided wave transduction mechanism; the device does not need to be in direct contact with the surface of the steel rail, does not need special treatment on the surface of the steel rail, is high in excitation guided wave energy, can be used for rail head and rail bottom flaw detection and is high in detection sensitivity.
本发明公开了一种用于钢轨探伤的电磁式导波激发装置及探伤方法,包括设置在钢轨上的导波激发件,所述导波激发件包括外壳,所述外壳的内部从上至下依次设置有永磁体、导磁片、第一绝缘层、反向回折线圈、第二绝缘层、正向回折线圈和第三绝缘层,本发明涉及钢轨探伤检测技术领域。该用于钢轨探伤的电磁式导波激发装置及探伤方法,通过外壳、永磁体、导磁片、第一绝缘层、反向回折线圈、第二绝缘层、正向回折线圈和第三绝缘层的配合,以电磁式导波换能机理将动磁场中的交变洛伦兹力作用激发钢轨中导波,装置无需与钢轨表面直接接触,无需对钢轨表面进行特殊处理,激励导波能量高,并且可用于轨头和轨底探伤,检测灵敏度高。
Electromagnetic guided wave excitation device for steel rail flaw detection and flaw detection method
一种用于钢轨探伤的电磁式导波激发装置及探伤方法
2024-08-16
Patent
Electronic Resource
Chinese
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