总字数：11600+
摘 要
21世纪以来，伴随着科技日新月异的发展，人民生活水平不断提高，人均收入稳步增加，汽车已经融入到每个家庭中，成为人们日常的好助手。驾车出行为我们节省了宝贵时间，从而提高了办事效率，但另外一个严重的问题也随之产生，因酒后驾车所造成的交通事故屡屡发生。为此，我国将酒驾列入刑法范围之内。那么设计一款智能仪器能够检测驾驶员车内酒精含量并自动控制引擎，就显得十分必要。本设计涉及了酒精传感器、STM32单片机、人体热释电、语音输出、继电器、液晶显示屏和GSM等部件，当检测驾驶员呼出气体的酒精浓度超标时，会发出声光报警，并切断点火电路控制引擎系统进行语音播报提醒，并发送短信信息到家人手机上。此装置可以根据不同的环境设定不同的比较阈值，精确检测出空气中所含有酒精浓度数值。本次防酒驾系统的设计思路主要分为两大部分，硬件实物部分和软件控制部分。硬件部分主要是利用酒精浓度传感器检测出车内酒精浓度，其输出的电信号经过A/D转换器传送到单片机，单片机及其相应的外围电路对信号做出判别，最后通过显示模块呈现酒精浓度数值，在这过程中，若超出预设值则立即禁止引擎启动，否则顺利点火起步。软件部分主要用C语言编写程序，采用模块化的独立设计结构，便于后续的调试和修改。
关键词：酒精传感器；人体红外；声光报警；语音播报；GSM
Abstract
Since the 21st century, with the rapid development of science and technology, people’s living standards are constantly improving, per capita income is increasing steadily, the car has been integrated into every family, become People’s Daily good assistant. Driving saves us valuable time and improves our efficiency, but another serious problem comes into being. Traffic accidents caused by drunk driving occur frequently. Therefore, our drunk driving into the scope of criminal law. Therefore, it is necessary to design an intelligent instrument that can detect the alcohol content in the driver’s car and automatically control the engine. This design involves alcohol pyroelectric sensors, STM32 microcontroller, body, speech output, relay, LCD display and GSM parts, such as when a driver breath gas excess alcohol concentration, will send out sound and light alarm, and cut off the speech reminds engine ignition circuit control system, home information on their phones and send text messages. This device can set different thresholds according to different environments, accurately detect the concentration of alcohol in the air. The design idea of the anti-drunk driving system is mainly divided into two parts, the hardware part and the software control part. Hardware part mainly using alcohol concentration sensor to detect the alcohol concentration inside, the output of the electrical signal after A/D converter to single chip microcomputer, single chip microcomputer and its corresponding peripheral circuit of signal discrimination, finally present alcohol concentration value by displaying module, in the process, if beyond the default value is immediately banned the engine starts, otherwise ignition start smoothly. The software part mainly uses C language to write programs, and adopts modular independent design structure, which is convenient for subsequent debugging and modification.
Keywords:alcohol sensor; Human body infrared; Sound and light alarm; Voice broadcast; GSM
目 录
第一章 绪论
第2章 系统设计方案
第3章 硬件设计
4 系统程序设计
第五章 实物测试
第六章 结论与展望
参考文献
致谢
附录
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