计算机传感器毕业设计,基于压电传感器的心率计的计算机设计与仿真毕业设计论文.doc...

毕业设计(论文)

基于压电传感器的心率计的

计算机设计与仿真

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2010 年 6 月摘 要

脉搏波所呈现出来的形态、强度、速率和节律等方面的综合信息,能反映出人体心血管系统中许多生理疾病的血流特征。根据人体脉搏信号特征,本文设计了一种脉搏波动频率测量系统。本次设计的压电传感器基础上的心率计,原理结构主要由六部分组成,其中包括:测量电路、放大电路、滤波整形电路、计数显示电路、控制电路、电源供电电路。其中传感器的选取是设计中的首要任务,其次就是信号的放大及计数电路的设计,关键点是计数电路中计数方式的选择。显示电路可以借助传统的设计模块作为参考。利用压电传感器,将人体的脉搏通过压电陶瓷片转换为可处理的电信号,经过集成运算放大器、滤波电路、整形电路等模块,在555时基电路、数码显示、控制、计数等电路元件的配合下,利用Multisim2001仿真软件,可以实现此心率计的仿真设计。各个电路模块,根据其功能特点均有多种方案选择,我们在设计过程中,利用所掌握的理论知识,对各种方案做出比较,并要求选择出最佳方案,完成整体设计,并且实现利用Multisim2001软件对每一模块的仿真。

本次设计任务详细分析了压电传感器应用于心率测量上的原理及优点,阐述了其他各配合电路的组成与工作特点,得出了在不同测量数据和技术参数条件下的仿真结果,使得本次课题的预期结果得以实现。关键词:压电传感器,控制电路,计数器, Multisim2001仿真软件

AThe shape, intensity, speed, and rhythm of pulse signals mostly reflect the physical and pathological characters of heart-blood system in human bodies. According to the characteristics of the human pulse signals, a pulse fluctuation frequency measurement system is designed. The design of piezoelectric sensors on the basis of heart rate, the main principle behind the structure from the six components, including: measuring circuit, amplifier, filter plastic circuit, counts show circuit, control circuits, power supply circuits. The selection of these sensors is the primary task in the design, followed by the signal is enlarged and the number of circuit design, the key point is counting circuit in the counting method choice. Show circuit can use the traditional design module as a reference. Use of piezoelectric sensors, will feel the pulse of the human body through the piezoelectric ceramics can handle the conversion to electrical signals, through integrated operational amplifiers, filter circuits, such as plastic circuit module, in 555 at-circuit, digital display, control, counting and other circuit elements , Coupled with the use Multisim2001 simulation software, can achieve this rate of simulation design. Each circuit module, according to t

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