换能器

Four aspects of research achievements include:(1)several imaging correction methods and strained estimation methods for biological tissues elasticity imaging were investigated as well as elasticity reconstruction and phantom, in vitro and in vivo elasticity imaging experiments;(2)in the fields of biological microsystem and perfusion evaluation for microvascular system, three kinds of microbubbles whose shell are albumin, sugar ester and surfactant respectively were designed and produced, then the methods to estimate the thickness of their shells were presented, moreover, the interacting mechanism of ultrasound contrast agents and tissues, as well as protein drug delivery under the condition of ultrasound sonification were studied in the molecular level;(3) At the aspect of high intensity focused ultrasound therapy system, we designed and constructed the 256-element HIFU transducers using 1-3 composite materials. And furthermore we developed the integrated HIFU system with 256-element HIFU transducers. And we made preliminary and important progresses in the research of HIFU bioeffect, lesion estimation, techniques of monitoring and imaging and characterizing of structure of HIFU transducer;(4)The real-time method of voice source regeneration based on compensative regulation of physiological parameters was investigated in the field of medical rehabilitation. We addressed the physiology and biophysics of vocalization, modeled voice source regeneration based on compensative regulation mechanism, and put forward an integrated evaluation about the speech rehabilitation and the regenerated voice source; Sixty-one archived journal papers were published, as well as ten in international journals, and eighteen publications were embodied by SCI.

中文摘要：成果包括：（1）在生物组织弹性成像方面，研究了多种图像校正方法和应变估计方法，进行了弹性重构和仿体、离体及在体超声弹性成像实验研究；（2）在生物微系统和微血管血流灌注成像方面，制备了三种不同包膜超声造影微泡，研究了纳米包膜厚度检测与估计方法以及不同纳米包膜造影微泡断裂与药物释放机制，并在分子层次上开展了超声与生物组织相互作用机制以及蛋白质药物超声乳化微囊包裹的研究；（3）在阵列式高强聚焦超声治疗与监控成像技术方面，设计制作了新的HIFU换能器，解决了256阵元单焦点和多焦点合成HIFU治疗系统关键技术问题，并在HIFU生物效应与创伤性评价方法、HIFU过程监控成像技术和薄层复合结构与HIFU 换能器界面特性评价等方面的研究取得了初步而重要的进展，具有重要应用前景；（4）在语音听觉系统特别是嗓音康复方面，研究了基于发声系统补偿调节机制的实时多模式嗓音源再生方法和发声生理，建立基于神经、肌肉和空气动力系统的综合补偿调节模型，提出了相应的评价系统。

Installation: Put the machine base on stable desktop, move transducer to adjust to an appropriate location and then lock, place ultrasonic generator and wheel machine next to it, and then connect Ultrasonic generator and transducer by assigned output line, and insert power plug of machine base into power output socket of ultrasonic generator.

安装：把机座放置在平稳的桌面上，将换能器升降移动调整至合适的位置然后锁紧，将超声波发生器及砂轮机放置在旁边，然后用随机所配的输出线将超声波发生器与换能器连接起来，而将机座上的电源插头插入超声波发生器的电源输出插座上。

1Installation. Place the machine base on balanced table, ascend and move the transducer to appropriate position and lock up, set aside the ultrasonic generator and grinding wheel machine, then connect the ultrasonic generator and transducer with output wire assigned by the machine.Insert the power supply plug on machine base into socket of power output on ultrasonic generator.

安装：把机座放置在平稳的桌面上，将换能器升降移动调整至合适的位置然后锁紧，将超声波发生器及砂轮机放置在旁边，然后用随机所配的输出线将超声波发生器与换能器连接起来，而将机座上的电源插头插入超声波发生器的电源输出插座上。

Based on the ultrasound field solution, temperature in tissues were estimated. Temperature elevation of some points were given in the figures. The influence of direction ratio to temperature distribution was discussed. It provided the ref...

在求解声场的基础上，对该类换能器的声场在组织中的温度分布进行估计，给出了组织内温度随时间变化的曲线，分析了方向比对焦区温度分布的影响，为该类换能器的参数选择和组织中的温度分布估计提供了参考

Objective: Ultrasound is considered as an alternative enedrgy for post-myocardial infarction ventricular tachycardia due to its good penetration through tissues. This study was designed to observe the effects of acoustic power, duration, repetitive ablations, tissue-transducer interface temperature and different sites of the ultrasound ablation in vitro.

使用1.8 MHz超声，分别对①离体犬心肌标本：a采用不同的声功率、时间、次数进行消融，部分标本在消融测量换能器—组织间温度；b采用相同频率和声功率消融左、右心室肌；c 采用与组织接触和不直接接触的两种超声换能器消融；标本均以甲醛固定1～2周后测量损伤灶深度及体积。

Methods Mouse spontaneous activities under the influence of the koumine injection were recorded with a photoelectric counter, and canine femoral artery pressure was de termined by CYS-0.5 pressure transducer, respiratory curve described with TB-61 1 tension transducer and electrocardiogram recorded with subcutaneous elec -trodes in the extremities after the ...

方法用光电计数仪测定钩吻素子注射液对小鼠自发活动的影响，用CYS-0.5型压力换能器测定犬股动脉血压，用TB-611型张力换能器记录犬呼吸曲线，针型电极刺入四肢皮下测二导联心电图。

According to the effect of device s structure on performance, we design the short column s hydroacoustic transducer.

根据水声换能器的结构对性能的影响，设计了短圆柱型水声换能器。

Ring appears armature electro-acoustic transducer, abandoned plane ferromagnetic disk Diaphragm Park, began to use his ring on the armature and the bonding of non-ferrous magnetic Park tapered at the end of radiator to lower the quality of the sound output pressure to increase by 5 decibels, to extend the frequency range of about 500Hz, the successful design, moving iron type electro-acoustic transducer to achieve the ultimate performance.

1950年出现的环型衔铁电声换能器，摒弃了铁磁性平面园盘振膜，开始采用环状衔铁和粘接其上的非铁磁性园锥形辐射体来降底质量，使输出声压提高了5分贝，频率范围扩展了约500Hz，这一成功设计使动铁式电声换能器的性能达到了极致。

Chapter two introduces the ultrasonic transducers that are important in the field of ultrasonic treatment.

第二章对超声治疗中较为重要的超声换能器进行了介绍，列出了换能器的主要性能指标及分类方式等。

Study the state of the art techniques in piezoelectric transducers and their applications.

学习当代压电换能器、新型换能器的发展状况与应用。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。