【作者】 张玉东；

【导师】 朱守正；

【作者基本信息】 华东师范大学 ， 电子与通信工程， 2010， 硕士

【摘要】 温度测量是工农业生产、现代科学研究及高新技术开发过程中一个极其普遍而重要的测量项目。现代电子检测技术正朝着高集成度、低功耗、可编程以及数字化的方向发展,传统的指针式温度指示器已经跟不上社会的发展需求。国内外在便携式温度测量仪这方面的研究及应用相当多,便携式电子设备的重要指标之一就是低功耗,低功耗是国际上节能和绿色环保的要求,是全球化的热潮。但现有智能便携式测温仪功耗基本都在180μW以上,而且精度比较低,价格比较高。本论文研究了一种超低功耗智能便携式温度测量仪,该测温仪采用热电阻传感器PT1000,16位高集成度、超低功耗单片机MSP430F4250,实现对温度信号的采集和处理。本论文的主要工作有:1)介绍了测温仪的概况以及降低便携式电子设备功耗的措施;2)分析了单片机MSP430在超低功耗中的应用,选用合适的器件进行了超低功耗智能便携式温度测量仪的硬件电路设计:a)分析了各类温度传感器特性,选用铂电阻PT1000作为温度传感器;b)分析了A/D转换器的技术指标及类型,选用MSP430内部的SD16_A模块;c)介绍了LCD显示器及LCD控制器:d)单片机选用MSP430系列芯片中的MSP430F4250,熟悉该单片机内部资源,设计出硬件电路;3)对系统进行了理论分析,包括系统功耗、精度、电阻采样以及铂电阻的非线性补偿计算;4)对超低功耗智能便携式温度测量仪进行了软件设计:a)超低功耗:选择合适的算法,软件的优化,保证系统低功耗;b)温度测量:介绍了AD采样的方法,保证AD采样精度以及AD值和电阻值之间的转换;c)铂电阻的非线性处理:分析了几种类型的非线性处理方法,选用电阻等分非线性处理方法,计算对应温度值;d)数字滤波算法的分析和选择,按键处理,以及LCD显示;5)完成超低功耗便携式温度测量仪样机的试制,并对样机进行了性能测试,其中功耗测试采用软件方法,测试结果达到设计要求。更多还原

【Abstract】 The temperature measurement is a very common and important measurement item in industry and agriculture production, modern science research and new technology development process. The modern electron detecting technology is developing toward the direction of high level of integration,low-power consumption, Programmable and digitallization. The tradition pointertype temperature indicator already cannot keep abreast with society’s development need.There already have quite many research and application of portable temperature measurement instrument inside and outside country. One of the important target for the portable electronic equipment is low power consumption, which is the demand of international energy conservation and green environmental protection, and is the globalized upsurge. But the existing intelligence portable temperature measurement instrument has the power consumption all above 180 uW, and the precision is comparatively low , the price is comparatively high.What this paper research is the ultra low power consumption intelligence portable temperature measuring instrument, this temperature measuring instrument uses the thermal resistance sensor PT 1000,16 position high integration and ultra low power consumption monolithic integrated circuit MSP430F4250, achieve temperature signal gathering and processing. This paper’s main work includes:1) Introduced the general situation of TMI and the way to reduce the portable electronic equipment’s power consumption;2) Analyzes the monolithic integrated circuit MSP430’s application in the ultra low-power consumption, selected the appropriate component to carry on the ultra low power consumption intelligence portable temperature measuring instrument’s hardware circuit design:a) Analyzes the characteristics of various types of temperature sensors, platinum resistance PT1000 use as a temperature sensor;b) Analyzes the technical indicators and types of A/D converter , selected SD16_A module in MSP430;c) Introduced LCD monitors and LCD controller;d) Selected MSP430F4250, understand internal resources of the MCU ,and to design the hardware circuit;3) Has carried on the theoretical analysis to the system, including system power consumption, precision, resistance sampling as well as platinum resistance nonlinear computation;4) Has carried on the software design to intelligent and portable temperature measurement instrument with ultra-low power consumption:a) Ultra low power consumption: Select the appropriate algorithms, software optimization, low power consumption to ensure the system;b) Temperature measurement: The AD sampling, guarantees between the AD sampling precision as well as the AD value and the resistance value transformation; c) Non-linear processing for platinum resistance:analyzes several types of non-linear approach,select the resistance equal portions to calculate the corresponding temperature value;d) Analysis and selection of digital filter algorithm, key processing, as well as the LCD display.5) Completes prototype’s production of the intelligent and portable temperature measurement instrument with ultra-low power consumption, and tests performance of the prototype, power tests using the software method, the test results meet the design requirements.更多还原