一种高效高频超声功率放大器的研制
发布时间：2018-12-10 18:51
【摘要】：病理组织处理是对患者的病变组织进行提取和处理的过程,通过观察研究组织细胞形态结构和变化情况,判断细胞病变、转移和扩散程度。病理组织的处理需要经过细胞固定、浸蜡、组织细胞处理、制作切片和染色等流程。组织细胞的处理是病理组织处理不可或缺的环节。超声功放用于对组织细胞的处理,是快速病理组织产品的核心部分,决定组织细胞处理的质量和速度,对患者的治疗有着直接的影响。快速病理组织可以节约临床上组织细胞检查的时间并应用于医院大规模的癌症的检查筛选。由于绝大多数的病理处理产品是国外公司研发的,国内从事开发此类产品的公司相对较少,导致国内市场上病理组织的产品比较缺乏。医院从国外购买设备价格昂贵,维修成本高。课题是在这样的背景下进行确立的,对快速病理组织产品核的超声功放进行研究,目的是要研制出一款高效稳定的超声功率放大器。超声功率放大器是应用型的研究课题,因此,在产品的具体设计的过程中考虑了企业需求。超声功率放大器划分多个模块并分别设计,主要包括信号源电路、驱动电路、负载电路、隔离电路和电源。本文重点研究以下几个方面:第一、论文绪论部分阐述了超声功率放大器的产生背景和研究意义,总结超声功率放大器的发展过程和趋势。分析了当前超声功率放大器情况,制定论文的工作计划。第二、介绍超声功率放大器的概念和工作的流程,简述半桥和全桥工作原理,比较了两种工作模式的优缺点。第三、重点介绍超声功率放大器的电路原理和设计,主要包括信号源芯片、驱动芯片和MOSFET管的选择。分析了全桥电路的原理、驱动芯片的典型电路和电路的优化设计,解决了在课题研究过程中发现的问题。第四、介绍了STM32芯片的系统组成,详细介绍了时钟树和定时器的理论知识,软件开发平台的介绍和配置步骤,程序编写的思路和程序的初始化,信号的下载和调试。第五、介绍了电路板制作、调试和总结展望,包括在电路板设计过程中器件选型、电路的布局,电源线和信号线的布线规则。对超声功率放大器进行系统调试,并展示部分调试结果。总结已经完成的工作,提出了超声功率放大器需要改进的地方和展望。
[Abstract]:Pathological tissue processing is the process of extracting and treating the pathological tissues of patients. The degree of cytopathology, metastasis and diffusion is judged by observing and studying the morphological structure and changes of tissues. The treatment of pathological tissue involves cell fixation, wax immersion, tissue cell processing, section making and staining. The treatment of histocytes is an indispensable link in the treatment of pathological tissues. Ultrasonic power amplifier is the core part of the rapid pathological tissue product, which determines the quality and speed of tissue cell processing, and has a direct impact on the treatment of patients. Rapid histopathology can save time for clinical histocyte examination and can be used for screening large-scale cancer in hospitals. Because most of the pathological products are developed by foreign companies, the number of domestic companies engaged in the development of such products is relatively few, resulting in the lack of pathological products in the domestic market. The hospital buys the equipment from the foreign expensive, the maintenance cost is high. Under this background, this paper studies the ultrasonic power amplifier of the rapid pathological tissue nuclear. The purpose is to develop a high efficient and stable ultrasonic power amplifier. Ultrasonic power amplifier is an applied research subject. Therefore, the demand of enterprise is considered in the process of product design. The ultrasonic power amplifier is divided into several modules, including signal source circuit, drive circuit, load circuit, isolation circuit and power supply. This paper focuses on the following aspects: first, the introduction of the paper describes the background and research significance of ultrasonic power amplifier, summarizes the development process and trend of ultrasonic power amplifier. The current situation of ultrasonic power amplifier is analyzed, and the work plan of the thesis is worked out. Secondly, the concept and working flow of ultrasonic power amplifier are introduced. The principle of half bridge and full bridge are briefly described, and the advantages and disadvantages of the two modes are compared. Thirdly, the circuit principle and design of ultrasonic power amplifier are introduced, including signal source chip, driver chip and MOSFET transistor. The principle of the full bridge circuit, the typical circuit of the drive chip and the optimum design of the circuit are analyzed, and the problems found in the course of the research are solved. Fourthly, the system composition of STM32 chip is introduced, the theoretical knowledge of clock tree and timer, the introduction and configuration steps of software development platform, the train of thought of programming and the initialization of program, the downloading and debugging of signal are introduced in detail. Fifthly, it introduces the circuit board making, debugging and summing up prospect, including device selection, circuit layout, wiring rules of power cord and signal wire in the process of circuit board design. The system of ultrasonic power amplifier is debugged, and some debugging results are shown. The work done is summarized, and the improvement of ultrasonic power amplifier is put forward.
【学位授予单位】：山东师范大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN722.75
本文编号：2371044
[Abstract]:Pathological tissue processing is the process of extracting and treating the pathological tissues of patients. The degree of cytopathology, metastasis and diffusion is judged by observing and studying the morphological structure and changes of tissues. The treatment of pathological tissue involves cell fixation, wax immersion, tissue cell processing, section making and staining. The treatment of histocytes is an indispensable link in the treatment of pathological tissues. Ultrasonic power amplifier is the core part of the rapid pathological tissue product, which determines the quality and speed of tissue cell processing, and has a direct impact on the treatment of patients. Rapid histopathology can save time for clinical histocyte examination and can be used for screening large-scale cancer in hospitals. Because most of the pathological products are developed by foreign companies, the number of domestic companies engaged in the development of such products is relatively few, resulting in the lack of pathological products in the domestic market. The hospital buys the equipment from the foreign expensive, the maintenance cost is high. Under this background, this paper studies the ultrasonic power amplifier of the rapid pathological tissue nuclear. The purpose is to develop a high efficient and stable ultrasonic power amplifier. Ultrasonic power amplifier is an applied research subject. Therefore, the demand of enterprise is considered in the process of product design. The ultrasonic power amplifier is divided into several modules, including signal source circuit, drive circuit, load circuit, isolation circuit and power supply. This paper focuses on the following aspects: first, the introduction of the paper describes the background and research significance of ultrasonic power amplifier, summarizes the development process and trend of ultrasonic power amplifier. The current situation of ultrasonic power amplifier is analyzed, and the work plan of the thesis is worked out. Secondly, the concept and working flow of ultrasonic power amplifier are introduced. The principle of half bridge and full bridge are briefly described, and the advantages and disadvantages of the two modes are compared. Thirdly, the circuit principle and design of ultrasonic power amplifier are introduced, including signal source chip, driver chip and MOSFET transistor. The principle of the full bridge circuit, the typical circuit of the drive chip and the optimum design of the circuit are analyzed, and the problems found in the course of the research are solved. Fourthly, the system composition of STM32 chip is introduced, the theoretical knowledge of clock tree and timer, the introduction and configuration steps of software development platform, the train of thought of programming and the initialization of program, the downloading and debugging of signal are introduced in detail. Fifthly, it introduces the circuit board making, debugging and summing up prospect, including device selection, circuit layout, wiring rules of power cord and signal wire in the process of circuit board design. The system of ultrasonic power amplifier is debugged, and some debugging results are shown. The work done is summarized, and the improvement of ultrasonic power amplifier is put forward.
【学位授予单位】：山东师范大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN722.75
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