A study of simultaneous multi-information imaging system by means of multifunctional piezoelectric elements

本研究的目的是建立一种利用多功能压电元件在物体的同一空间同时对多种信息进行成像的系统。在本研究中，我们尝试利用多功能压电元件来建立两种类型的成像系统--线阵和圆柱型，并取得了一些积极的结果。在针对活体的线阵成像系统中，我们尝试建立了使用八个压电元件的电学和超声同时测量系统。成像系统由模拟开关、I/O板和8通道同步AD板组成。在实验中，利用成像系统对琼脂作为活体模型的电学和超声特性进行了测量。结果表明，虽然在测量精度和测量算法上还存在一些问题，但利用该系统可以测量管道的电学特性和超声特性。在工业管道柱状成像系统中，我们尝试建立了16个压电元件的成像系统。建立了由开关系统、I/O板、双通道同步AD板构成的成像系统。在实验中，实现了对蒸馏水中丙烯酸柱或薄膜丙烯酸管的检测。为了评估利用多功能压电元件进行多信息成像的可能性，根据一对压电元件测量的电学和超声特性，检测了均匀介质中目标的三个参数。作为结果，我们提出了利用该方法检测物体的三个参数的可能性。因此，我们提出了利用多功能压电元件进行多信息成像的可能性。

The aim of this research is to establish the system to image simultaneously multi-information at the same space of the object by the multi-functional piezoelectric elements. In this study, we tried to establish two types of imaging systems-linear array and cylindrical types-by multifunctional piezoelectric elements, and we achieved some positive results.In linear array typed imaging system for the living body, we tried to establish the electrical and ultrasonic simultaneous measurement system using eight piezoelectric elements. The imaging system is constructed by the analog switches, the I/O board and the 8-channel simultaneous AD board. In the experiment, electrical and ultrasonic properties of the agar as the living body model were measured by the imaging system. From results, we suggested that it is possible to measure the electrical and ultrasonic properties by using the proposed system, although there are some problems should be solved in the measurement accuracy and measurement algorithm.In cylindrical imaging system for industrial pipeline, we tried to establish the imaging system using sixteen piezoelectric elements. We established the imaging system constructed by the switching system, the I/O board, and the 2-channel simultaneous AD board. In the experiment, detection of acrylic column or acrylic pipe of thin film in the distilled water was demonstrated. From results, we suggested that simultaneous imaging of electrical and ultrasonic properties is possible.To assess the possibility of the multi-information imaging using multifunctional piezoelectric elements, three parameters of a target in the homogeneous medium were detected from electrical and ultrasonic properties measured by a pair of piezoelectric elements. As results, we presented that detection of three parameters of the object is possible by the proposed method. Therefore, we suggested the possibility of multi-information imaging using multifunctional piezoelectric elements.