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磁粉、渗透和打水压方法均无法有效用于超高压人造水晶釜内腔表面裂纹在役无损检测,超声波法难于判定早期缺陷,容易误判和漏判。涡流法需保持涡流探头在深达数米的内腔表面平稳地扫查。为此研制了涡流旋转耦合无线传输新技术。详细论述了轴向和周向裂纹的检测采集、信号旋转耦合、传输、存储记录的软硬件。经实验室验证和现场使用,有效解决在役金属管道内表面裂纹扫查检测问题。
The methods of magnetic powder, infiltration and water pressure can not be effectively used for the in-service non-destructive testing of in-service surface cracks on the inner cavity of UHP artificial crystal autoclave. The ultrasonic method is difficult to judge the early defects and is easy to be misjudged and missed. Eddy current method to maintain the eddy current probe in the depth of several meters of the luminal surface smooth scan. For this reason, a new technology of vortex rotation coupled wireless transmission was developed. Discussed in detail the axial and circumferential crack detection acquisition, signal rotation coupling, transmission, storage and recording of hardware and software. After laboratory verification and on-site use, effectively solve the in-service inspection of the inner surface of the metal pipe crack detection problems.