基于单片机的环境噪声检测仪的设计
所 在 学 院
专 业 名 称
完 成 日 期
摘 要
随着社会发展水平的提高,噪声的危害日益突现,对环境噪声的实时检测越来越得到人们的重视。环境噪声监测,是人类提高生活质量,加强环境保护的一个重要环节。
本文详细介绍了噪声监测系统的测量原理和系统组成,包括:噪声信号的转换、放大、V/F转换、数据采集和显示系统的设计。外界噪声信号经过传声器变换成音频信号,电信号通过放大和V/ F 变换输入到单片机进行处理,并转换成相应的噪声分贝值通过LED 显示,从而实现噪声的实时监测。
该系统具有实现简单,精确度高,适用于实际进行噪声的实时监测等特点。
关键词:运算放大器,噪声,单片机,LED
ABSTRACT
With the improvement of social development, harm of noise more emergent, real-time detection of environmental noise and get people's attention. Environmental noise monitoring, which is improving the quality of life, strengthen environmental protection an important part .
In the paper, the measurement principle and the system constitution are introduced in detail, including: the noise signal converting system, signal magnifying system, V/F converting system, data collection and indication system. This paper introduces the ways to convert the real-time monitoring of the noise into acoustic frequency electrical signal by using microphone, operational amplifier and V/ F converter, which will act as Single Chip Micoyo’s input signal. Then the SCM will change it into a noise DB value, which will be displayed on LED.
This system is simple 0and has high precision, so it is always used in monitoring the urban noise real-time.
Key words:operational amplifier,noise,Single Chip Micoyo, LED
目录
…………