Aiming at the problem of health monitoring of advanced equipment bearing structure,an ultrasonic guided wave detection system integrating 128 sensor channels is developed,including integrated piezoelectric in-telligent layer,system host,and upper computer software with real-time damage location function.By optimiz-ing the appearance and laminated design of the intelligent layer,improving the output power of the host,adap-tively amplifying the response signal and adding crosstalk suppression circuit,the system can operate reliably in complex environment.Furthermore,different test environments are set up to verify the crosstalk suppression ef feet of the system,the accuracy of damage location and the stability of the signal stability under variable tempera-ture and vibration conditions.The results show that the system can realize the stripping of crosstalk signals with different intensities.The damage location error is mm level and the damage index caused by temperature and vi-bration interference is one order of magnitude smaller than the damage.Therefore,the system has high stability and strong environmental adaptability which can be used as an online monitoring instrument for the health moni-toring of high-end equipment bearing structures.
关键词
超声导波/串扰抑制/智能层/结构健康监测
Key words
ultrasonic guided waves/crosstalk suppression/intelligent layer/structural health monitoring
维普
万方数据