基于数控超声波发生器的防除污损生物系统设计
发布时间：2018-09-06 15:51
【摘要】：由于污损生物容易在海水管线内壁和海水过滤器网附着沉积，为此可利用超声波技术杀死海生物幼体，以防止其透过滤网进入海水系统成长，从而避免造成海水管道污染堵塞[1-2]。论文针对中海油海上平台防除污损生物的需求，进行了超声波自动控制系统的设计及实施。 论文所涉及的超声波自动控制系统主要由超声波发生器、超声波振动系统、防爆柜和组态监控系统组成。论文通过分析海上平台防除污损生物的要求，首先设计了超声波防爆系统，针对单台或多台启动需求，，进行了控制柜的电气设计及连接；然后针对超声波振动部分功率和频率的需求，选择了合适的换能器，并针对此换能器研究开发了基于STM32的超声波数控发生器；最后，针对海上平台全自动超声波控制系统的监控需求，设计了组态界面，基于Modbus通信协议的基础上实时显示超声波驱动电源的数据。 本文所设计的数控式超声波发生器（或称为超声波驱动电源）采用意法半导体（ST）公司生产的STM32系列为主控芯片。通过四路PWM输出驱动电路来分别驱动全桥电路的四个IGBT，经变压器耦合产生的高频交流信号，通过串联谐振匹配网络后接入超声波换能器并驱动超声波振动系统以需要的振幅进行工作。超声波驱动电源系统采用智能数字式控制算法，实现自动频率搜索与频率跟踪精细、准确。通过实验结果，设计了一种智能化的功率控制方法即便在工作负载剧烈变化的场合，也能实现换能器振幅恒定，同时系统内置保护电路，系统故障报警机制完善且运行稳定。 论文通过设置不同的工作功率和工作方式，通过检测超声波系统对海生物的杀死效果以寻求超声波杀死海生物的最佳功率。同时论文实验结果表明超声波在防除海洋污损生物方面具有简单、经济、有效、环保等优点。因此，运用超声波技术开展海洋污损生物防除方面的实验研究具有重要的意义和美好的发展前景。
[Abstract]:Because fouling organisms are easy to deposit on the inner wall of seawater pipeline and seawater filter net, the marine organism larvae can be killed by ultrasonic wave technology in order to prevent them from growing into the seawater system through the filter net, thus avoiding the pollution and blockage of seawater pipeline [1-2]. In order to meet the demand of anti-fouling organisms on CNOOC offshore platform, the design and implementation of ultrasonic automatic control system are carried out in this paper. The ultrasonic automatic control system is mainly composed of ultrasonic generator, ultrasonic vibration system, explosion-proof cabinet and configuration monitoring system. By analyzing the requirements of anti-fouling organisms on the offshore platform, the ultrasonic explosion-proof system is designed, and the electrical design and connection of the control cabinet are carried out according to the single or multiple start-up requirements. Then according to the demand of ultrasonic vibration part power and frequency, the suitable transducer is selected, and the ultrasonic numerical control generator based on STM32 is researched and developed. According to the monitoring requirement of the automatic ultrasonic control system of offshore platform, the configuration interface is designed, and the data of ultrasonic driving power supply is displayed in real time based on Modbus communication protocol. The numerical controlled ultrasonic generator (or ultrasonic driving power supply) designed in this paper uses the STM32 series produced by Italy Semiconductor (ST) Company as the main control chip. Four PWM output drive circuits are used to drive the high-frequency AC signals generated by transformer coupling of four IGBT, of the full-bridge circuit. A series resonant matching network is used to connect the ultrasonic transducer and drive the ultrasonic vibration system to work with the desired amplitude. The ultrasonic drive power supply system adopts intelligent digital control algorithm to realize automatic frequency searching and frequency tracking. According to the experimental results, an intelligent power control method is designed, which can realize the constant amplitude of the transducer, the built-in protection circuit, the perfect alarm mechanism and the stable operation of the system, even when the workload changes dramatically. By setting up different working power and working mode, this paper tries to find out the best power of ultrasonic killing marine organisms by detecting the killing effect of ultrasonic system on marine organisms. At the same time, the experimental results show that ultrasonic wave has the advantages of simple, economical, effective and environmental protection. Therefore, the application of ultrasonic technology to the biological prevention of marine fouling has important significance and bright development prospects.
【学位授予单位】：杭州电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB559
[Abstract]:Because fouling organisms are easy to deposit on the inner wall of seawater pipeline and seawater filter net, the marine organism larvae can be killed by ultrasonic wave technology in order to prevent them from growing into the seawater system through the filter net, thus avoiding the pollution and blockage of seawater pipeline [1-2]. In order to meet the demand of anti-fouling organisms on CNOOC offshore platform, the design and implementation of ultrasonic automatic control system are carried out in this paper. The ultrasonic automatic control system is mainly composed of ultrasonic generator, ultrasonic vibration system, explosion-proof cabinet and configuration monitoring system. By analyzing the requirements of anti-fouling organisms on the offshore platform, the ultrasonic explosion-proof system is designed, and the electrical design and connection of the control cabinet are carried out according to the single or multiple start-up requirements. Then according to the demand of ultrasonic vibration part power and frequency, the suitable transducer is selected, and the ultrasonic numerical control generator based on STM32 is researched and developed. According to the monitoring requirement of the automatic ultrasonic control system of offshore platform, the configuration interface is designed, and the data of ultrasonic driving power supply is displayed in real time based on Modbus communication protocol. The numerical controlled ultrasonic generator (or ultrasonic driving power supply) designed in this paper uses the STM32 series produced by Italy Semiconductor (ST) Company as the main control chip. Four PWM output drive circuits are used to drive the high-frequency AC signals generated by transformer coupling of four IGBT, of the full-bridge circuit. A series resonant matching network is used to connect the ultrasonic transducer and drive the ultrasonic vibration system to work with the desired amplitude. The ultrasonic drive power supply system adopts intelligent digital control algorithm to realize automatic frequency searching and frequency tracking. According to the experimental results, an intelligent power control method is designed, which can realize the constant amplitude of the transducer, the built-in protection circuit, the perfect alarm mechanism and the stable operation of the system, even when the workload changes dramatically. By setting up different working power and working mode, this paper tries to find out the best power of ultrasonic killing marine organisms by detecting the killing effect of ultrasonic system on marine organisms. At the same time, the experimental results show that ultrasonic wave has the advantages of simple, economical, effective and environmental protection. Therefore, the application of ultrasonic technology to the biological prevention of marine fouling has important significance and bright development prospects.
【学位授予单位】：杭州电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB559
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