基于半导体控温的冷热敷治疗仪控制系统设计

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基于半导体控温的冷热敷治疗仪控制系统设计
目ቤተ መጻሕፍቲ ባይዱ
录
摘要 ........................................................................................................................................... II Abstract .................................................................................................................................... III 1 绪论 ...................................................................................................................................... 1 1.1 背景 ........................................................................................................................... 1 1.2 冷热敷治疗仪的国内外产品现状 ........................................................................... 2 1.3 课题主要工作 ........................................................................................................... 3 2 系统总体方案设计 .............................................................................................................. 4 2.1 升温/降温方案 .......................................................................................................... 4 2.2 系统总体结构组成 ................................................................................................... 5 2.3 系统总体硬件设计 ................................................................................................... 6 2.4 系统总体程序设计 ................................................................................................... 8 3 主控系统电路设计 ................................................................................................................ 8 3.1 中央处理器电路设计 ............................................................................................... 9 3.1.1 中央处理器的选择 ........................................................................................ 9 3.1.2 STM32 最小系统电路设计 ........................................................................... 9 3.2 温度信号采集电路设计 ......................................................................................... 11 3.2.1 3.2.2 3.3.1 3.3.2 隔离方案的选择 .......................................................................................... 12 温度信号采集电路设计 .............................................................................. 13 水位信号采集电路设计 .............................................................................. 16 电流信号采集电路设计 .............................................................................. 17
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基于半导体控温的冷热敷治疗仪控制系统设计
摘
要
冷热敷治疗仪是一种集热敷和冷敷两种物理治疗方法于一体的医疗器械， 在各大医 院以及临床研究领域有广泛应用。但从目前国内大部分的冷热敷医用器械来看，往往存 在着安全可靠性能差，温度控制不够精确，噪声大以及不环保等等缺点。针对这些种种 缺点， 本文在参考了国内外医用冷热敷设备的基础上， 利用本科所学习的一些微机原理， 数字传感器技术等等， 提出了基于半导体制冷原理的医用冷热敷治疗仪的控制系统设计 方案。 本系统是基于 ST 公司生产的 STM32F103VET6 单片机芯片的控制系统，可分为控 制系统部分，负责制冷加热转换的升降温系统部分以及电源部分。控制系统中，采用的 是触摸液晶屏实现人机交互，来获取用户所设定的目标温度，同时可以显示由温度传感 器所测的实时温度； ;升降温系统部分则利用温度传感器所传输的不同信号， 使得 STM32 输出不同占空比的 PWM 脉冲从而控制半导体制冷模块对循环制冷液的加热或制冷来达 到设定目标温度；电源部分则是外接 220V 市电，经过电压转换模块变成 24V，其他各 个部分不同的电源电压则是通过不同的电压转换变成相应所需要的电压，3.3V，±5V， 12V 等等。同时，本系统中大量采用了 ADuM 系列磁耦隔离芯片来实现输入信号、主 控系统以及输出信号之间的隔离，从而提高了系统的安全性和可靠性。 关键词：冷热敷；STM32；半导体制冷
基于半导体控温的冷热敷治疗仪控制系统设计
基于半导体控温的冷热敷治疗仪控制系统设计
Temperature control based on semiconductor of cold fomentation therapy instrument control system design
学部（学院）：机械工程学院 专业：测控技术与仪器 学生姓名： 学号： 指导教师： 评阅教师： 完成日期：
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基于半导体控温的冷热敷治疗仪控制系统设计
Temperature control based on semiconductor of cold fomentation therapy instrument control system design
Abstract
Cold fomentation therapy device is a set of hot and cold in one of two physical therapy medical device .Many hospitals and clinical research has wide application.Most of the domestic medical control blanketshave poor security and reliability, low temperature accuracy, unfriendly interface and othershortcomings. To compensate for these shortcomings,this paper proposes a design of themedical control blanket control system on the basis of embedded technology, digital sensortechnology, touch screen technology and intelligent control algorithm. This system is based on the ST company's STM32F103VET6 single chip control system.It can be divided into the part of the control,heating and cooling systems,andpower supply section.In control system, using LCD touch screen human-computer interaction, to get the user the set target temperature. And it can display real-time temperature measured by the temperature sensor. Heating and cooling systems with different parts of the transmitted signal from the temperature sensor, so that different STM32 output PWM duty cycle pulses to control the semiconductor cooling module for circulating cooling fluid heating or cooling to achieve the set target temperature.Power is the external power supply 220V electricity, through the voltage converter module becomes 24V, various other parts of the different supply voltage is turned into the appropriate voltage required by different voltage conversion, 3.3V, ± 5V, 12V, etc. At the same time, the system uses a lot ADuM series magnetic coupling isolation chip to achieve isolation of the input signal, the main control system and the output signals, thereby improving the safety and reliability of the system. Key Words：Cold and hot fomentation; STM32; TEC