基于K型热电偶的动态温度测量系统设计
毕业论文关键词：K型热电偶，动态温度测量，AD8497，STM32
Title Design of Temperature Measurement System based on the K type thermocouple
Abstract
Since Germany porsche first introduced automatic transmission, automatic
transmission technology got rapid development.In the process of the automatic
transmission shift will cause a lot of friction heat, for temperature monitoring
has very important significance.
This article in view of the internal environment of the clutch design the
dynamic temperature measurement system based on K type thermocouple.Test system
hardware structure with the STM32 as the core, built-in adc for data collection,
combined with the thermocouple amplifier AD8497, realize the signal disposal
and collection.Software system, the software of singlechip processor system
independently complete measurement, display, control, transmission, etc.PC
software to achieve the lower machine control, data transmission, data display,
data storage, and other functions.
The paper finally ready experiment was carried out.By experimental
verification, the calibration temperature range, measurement accuracy, response
time is about 5 ms, satisfying the requirements test system.
Keywords: K-type thermocouple, dynamic temperature,AD8497,STM32
目 次
1.绪论 1
1.1 课题研究背景及技术要求 . 1
1.2 课题的国内外研究现状 . 1
1.3 使用热电偶测量温度的发展现状和展望 . 2
1.4 本文的主要工作 . 3
2.系统总体设计 4
2.1 系统概述 4
2.2 系统整体构架 4
2.2.1 硬件系统构架 . 4
2.2.2 软件系统构架 . 5
2.3 本章小结 . 6
3.系统硬件设计 7
3.1 系统主要芯片选型 7
3.1.1 微处理器 . 7
3.1.2 放大器 . 7
3.1.3 模数转换器 . 8
3.1.4 上位机通信芯片 . 9
3.2 硬件功能模块的设计 9
3.2.1 电源模块 . 9
3.2.2 热电偶调理电路 ... 10
3.2.3 ADC驱动电路 14
3.2.4 模数转换电路 ... 15
3.2.5 冷端温度测量电路 ... 16
3.2.6输入输出模块 17
3.3 本章小结 .. 17
4 系统软件设计 . 18
4.1 下位机软件整体设计 .. 18
4.1.1 输入输出设备 ... 18
4.1.2 模数转换部分 ... 19
4.1.3 软件滤波 ... 20
4.1.4测量冷端温度部分 22
4.1.5开路检测部分 23
4.1.6非线性修正 24
4.2 上位机软件整体设计 .. 25
4.2.1 连续模式 ... 26
4.2.2 存储模式 ... 27