| 1. | Research on phase aberration of ultrasonic phased array echo signal
超声相控阵回波信号相位偏差的研究 |
| 2. | The ultrasonic phased array system for monitoring the expanding of weld defect in steel bridge was researched
摘要研制了针对钢结构桥梁焊缝缺陷扩展的超声相控阵监测系统。 |
| 3. | Testing in lab and on - site proved that the ultrasonic phased array system was stable and reliable , and was high value in use
实验模拟和现场测试证明，该系统稳定可靠，有很高的实用价值。 |
| 4. | Ultrasonic phased array technique can help to achieve flexible , controllable synthesized ultrasound beam by exciting each element of an ultrasonic array transducer with independent phase delay
超声相控阵技术通过对超声阵列换能器中各阵元进行相位控制，获得灵活可控的合成波束。 |
| 5. | 2 . the analytical pressure distribution of ultrasonic phased array for the beam focusing was obtained using the huygen s principle , by use of computer software , the pressure distribution was plotted . 3
根据相控阵的延时聚焦原理，推出了相控阵的声压分布表达式，采用数值分析法，利用计算机软件画出了声压分布图。 |
| 6. | 3 . the analytical pressure distribution of ultrasonic phased array for the beam focusing was obtained using the huygen s principle , by use of computer software , the pressure distribution was plotted . ( 3 )
根据相控阵的延时聚焦原理，推出了相控阵的声压分布表达式，采用数值分析法，利用计算机软件画出了声压分布图。 |
| 7. | In recent several decades , ultrasonic phased arrays had been applied to many medical specialties and nondestructive evaluation ( nde ) . an ultrasonic phased array consists of multiple elements which are usually cut or etched from a single piezoelectric plate of lead zirconate titinate ( pzt ) . the element thickness determines the operating frequency of the transducer
近年来，随着科学技术的飞速发展，超声相控阵已广泛的应用在医学、无损检测等方面，所谓相控阵，就是由多个压电陶瓷片(阵元)按一定的分布排列，然后逐次按欲先规定的延迟时间激发，就可以实现声波的聚焦。 |
