集約型無繩多元心脈傳感器研究與設計

電子機電論文編號:JD326  字數:15810,頁數:36,          

目錄

1 引言 1
2 系統分析 3
2.1集約型無繩多元心脈傳感器 3
2.2設計的方案思路 3
2.3設計的關鍵要數 3
3硬件設計 4
3.1 系統的總體設計 4
3.2 脈搏傳感器 4
3.2.1 脈搏信號 4
3.2.2 傳感器的選取 5
3.2.3傳感器及調理電路的設計 7
3.3心電傳感器 10
3.3.1心電傳感器工作原理 10
3.3.2心電傳感器的設計 11
3.4基于MSP430F449控制的采集處理器設計 15
3.4.1 MSP430F449采集處理器的硬件設計 18
3.5無線芯片 20
4調試 23
4.1.調試用測試儀器 23
4.2.調試方法和過程 23
4.2.1 采集電路 23
4.2.2 信號調理電路 23
4.2.3 信號轉換 23
5總結 24
致謝 25
參考文獻 26
附錄 28
1.AD轉換程序 28
2.脈搏信號調理電路 29
3.心電信號調理電路 29
4.實物圖 30

摘要
隨著社會生活節奏加快、人口逐漸老齡化，心血管疾病已經成為嚴重威脅人類健康和生命的主要疾病，而且此類疾病往往具有突發性，如果不能及時發現并進行治療將會產生非常嚴重的后果。心電監護儀是此類疾病重要的檢測手段，它對保障患者生命安全降低患者死亡率有著十分重要的意義。本文針對現有的脈搏傳感器以及心電傳感器的特點和要求,應用TI公司推出的超低功耗單片機MSP430單片機為核心控制器設計了一款結構簡單、功能適當、功耗低并且價格低廉適合于隨身使用的檢測器。
本文設計的傳感器主要是要做到：
儀器微型化，能隨身攜帶，并能利用普通電池提供比較長久的使用時間。做到方便快捷。
儀器能在采集數據后自行轉換并發送到服務終端，連接遠程醫療系統，實現實時的數據采集和分析。
本文的設計方案是：系統主要由三部分組成，信號采集，信號調理，以及數據的處理及發送。使用PVDF壓電薄膜采集脈搏信號。心電信號則使用AD620和OP07放大器組成前置放大電路。信號調理電路則由低通，高通，濾波，陷波電路等組成。最后選用MSP430單片機作為核心處理芯片，由其自帶的A/D轉換器實行模數轉換，然后經由無線發送模塊發送數據至指定終端。

關鍵詞：MSP430； PVDF；壓電薄膜； 脈搏信號；心電采集

Abstract
With the accelerating pace of social life, population ageing, cardiovascular disease has become the major diseases which are serious threat to human health and life, and such diseases are often unexpected, if not making detection and treatment timely, it will get very serious Consequences. ECG monitor  is an important means of detecting such disease. It is very important in protecting the safety of its patients and reducing the mortality rate. By the characteristics and requirements of ECG monitor and pulse sensors. This paper is about the study and design of gathering device of the pulse signal of human body. It design a simple structure, function properly, low power consumption and low prices detectors，which is based on MSP430.
Sensor is designed to:
It should be Micro-machines and can be protable. It should work long time with the common batteries.
After Collecting data, it can conversion and send the data to the service terminal .
Design is:
System is mainly composed of three components, signal acquisition, signal conditioning, data processing and sending. The piezoelectric film called PVDF is used for collecting the pulse signals. By using the circuit that is based on the Analog Devices AD620 and OP07 amplifier. ECG signal will be amplified. Finally we use the MSP430 microcontroller as a core chip, and do analog-digital conversion with its own A/D converter, then send the date to the designated terminal by wireless data modules.

Keywords: MSP430；PVDF；Pulse signals；ECG