文档介绍：摘要
由于超声波指向性强,能量消耗缓慢,在介质中传播的距离较远,因而超声波经常用于距离的测量,如测距仪和物位测量仪等都可以通过超声波来实现。利用超声波检测往往比较迅速、方便、计算简单、易于做到实时控制,并且在测量精度方面能达到工业实用的要求,因此在移动机器人研制上也得到了广泛的应用。由于超声波对光线、精度、价格和电磁场不敏感,因此超声波测距对环境有较好的适应能力。为此,本文以AT89C52单片机为核心,利用一对40KHZ压电超声传感器结合软硬件设计一款体积较小、价格低廉、具有温度补偿、实时LCD显示和报警的超声波测距系统。
关键词:超声测距;AT89C52单片机;温度补偿;LCD显示;软硬件设计
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Abstract
Temperature as an important physical quantity is one of the mon and important process parameters. Along with the time progress, society's development, science's and technology's unceasing renewal, the requirements of temperature measurement range continue to expand,.At the same time ,the temperature measurement accuracy requirements continue to enhances. Temperature measurement requirements have e more sophisticated, so the temperature detection and temperature detection technology is also an important research subject
This article analyzes the temperature survey principle and uses the AT89C51 microcontroller as the master control chip,posed by the temperature sensor, measuring amplifiers, multi-channel A / D converter. The design of the programming environment is the KEIL UVISION2, including data receiving module, voltage temperature conversion modules, LCD liquid crystal display module and so on . The temperature gathering module has used different temperature sensor in the different temperature range,In the normal temperature scope uses DS18B20, in the low temperature scope with the T thermo-element, in the high temperature scope to use the B thermo-element. This system's temperature measurement scope is broad, may satisfy the majority temperature measurement requests and has certain use value
Keywords: Temperature sensor; AT89S51 microcontroller; Temperature measurement; A/D conversion
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目录
摘要 I
Abstract II
第一章绪论 1
……………………………………………………………… 1
1,2 国内外研究现状…………………………………………………………………
课题研究背景及意义………………………………………………………….3
本文的工作…………………………………………………………………….
第一章超声测距系统的方案与论证 1
超声测距思路 1
系统总体设计方案 3
系统总体方