畢業(yè)論文 汽車倒后防撞報警器的設計分析.doc
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畢業(yè)論文 汽車倒后防撞報警器的設計分析,摘要本設計從實驗研究分析的角度，分析了汽車倒車防撞系統(tǒng)的基本設計原理以及目前國內外此類防撞系統(tǒng)存在的問題。較詳細的介紹一種超聲波測距系統(tǒng)以及根據(jù)該系統(tǒng)設計，研制的汽車倒車防撞報警器，它能自動檢測車尾障礙物的距離。當達到極限位置的時候，它能發(fā)出聲光報警，提醒司機剎車。設計采用國內生產(chǎn)廠家的通用元件，成本低，性能可靠，有利...
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摘要
本設計從實驗研究分析的角度，分析了汽車倒車防撞系統(tǒng)的基本設計原理以及目前國內外此類防撞系統(tǒng)存在的問題。較詳細的介紹一種超聲波測距系統(tǒng)以及根據(jù)該系統(tǒng)設計，研制的汽車倒車防撞報警器，它能自動檢測車尾障礙物的距離。當達到極限位置的時候，它能發(fā)出聲光報警，提醒司機剎車。設計采用國內生產(chǎn)廠家的通用元件，成本低，性能可靠，有利于推廣。超聲波距離傳感器采用壓電元件鋯鈦化鉛，一般稱為RZT，這種傳感器的特點在于具有方向性，汽車所用的倒車聲納系統(tǒng)利用超聲波距離傳感器的“回聲”現(xiàn)象制成的，倒車時向車輛后方發(fā)射超聲波，測定超聲波遇到障礙物后返回的時間，就可以得到車到障礙物的距離。在此要感謝王老師對我的指導，感謝同組人的合作及幫助過我的同學。由于編者水平有限,書中的錯漏在所難免，懇請讀者批評指正。
關鍵字：超聲波 汽車倒車 防撞 報警器 傳感器
ABSTRACT
The basic designing principle of the automobile anticollisionsystem and the problems existed in the domestic and internationalare analyzed. In this paper, Not only ultrasonic range meteringsystem also principle ,methods and procedures of the designaccording to the design were introduced. The car’ back upanticollision alarm is studied. When the distance reaches the limitpoint, the alarm can give out sound and Light alarm,reminding drivers to brake.The design includes sending,receiving and alarm.Signal is sent and received by ultrasonic transducer,which isequipped with directivity. piezoelectric element is used ,generallycalled RZT. In anticollision circuit, acousto-optic anticollisionis applied for voice alarm. This designing adopts the commoncomponent of domestic manufacturers, with low costs, reliableperformance, and it is easy to be popularized.
Key words: ultrasonlccar’back up anticollision alarmsensor
ABSTRACT
The basic designing principle of the automobile anticollisionsystem and the problems existed in the domestic and internationalare analyzed. In this paper, Not only ultrasonic range meteringsystem also principle ,methods and procedures of the designaccording to the design were introduced. The car’ back upanticollision alarm is studied. When the distance reaches the limitpoint, the alarm can give out sound and Light alarm,reminding drivers to brake.The design includes sending,receiving and alarm.Signal is sent and received by ultrasonic transducer,which isequipped with directivity. piezoelectric element is used ,generallycalled RZT. In anticollision circuit, acousto-optic anticollisionis applied for voice alarm. This designing adopts the commoncomponent of domestic manufacturers, with low costs, reliableperformance, and it is easy to be popularized.
Key words: ultrasonlccar’back up anticollision alarmsensor
目錄
第一章 緒論 1
1.1 選題意義 1
1.2 汽車倒后防撞報警器的研究現(xiàn)狀 1
1.3本論文的特色 2
第二章 報警器的相關技術介紹 3
2.1傳感器類型的選擇 3
2.1.1傳感器的主要類型 3
2.1.2 倒車過程中選用的傳感器 5
2.2測距原理 5
2.2.1 倒車過程中的測距原理 5
第三章 報警器的硬件電路設計 7
3.1 倒車過程中的防撞報警器的硬件設計 7
3.1.1整體設計 7
3.1.2超聲波發(fā)射電路 7
3.1.3超聲波接收電路 8
3.1.4篩選電路 9
3.1.5整形電路 9
3.1.6 語音錄音電路 10
3.1.7放音電路 11
3.1.8 總電路圖 12
第四章 報警器的軟件設計 15
4.1 倒車過程中的防撞報警軟件設計 15
第五章 結論與展望 19
5.1 結論 19
5.2 展望 19
致謝 21
參考文獻 23
附錄 25
本設計從實驗研究分析的角度，分析了汽車倒車防撞系統(tǒng)的基本設計原理以及目前國內外此類防撞系統(tǒng)存在的問題。較詳細的介紹一種超聲波測距系統(tǒng)以及根據(jù)該系統(tǒng)設計，研制的汽車倒車防撞報警器，它能自動檢測車尾障礙物的距離。當達到極限位置的時候，它能發(fā)出聲光報警，提醒司機剎車。設計采用國內生產(chǎn)廠家的通用元件，成本低，性能可靠，有利于推廣。超聲波距離傳感器采用壓電元件鋯鈦化鉛，一般稱為RZT，這種傳感器的特點在于具有方向性，汽車所用的倒車聲納系統(tǒng)利用超聲波距離傳感器的“回聲”現(xiàn)象制成的，倒車時向車輛后方發(fā)射超聲波，測定超聲波遇到障礙物后返回的時間，就可以得到車到障礙物的距離。在此要感謝王老師對我的指導，感謝同組人的合作及幫助過我的同學。由于編者水平有限,書中的錯漏在所難免，懇請讀者批評指正。
關鍵字：超聲波 汽車倒車 防撞 報警器 傳感器
ABSTRACT
The basic designing principle of the automobile anticollisionsystem and the problems existed in the domestic and internationalare analyzed. In this paper, Not only ultrasonic range meteringsystem also principle ,methods and procedures of the designaccording to the design were introduced. The car’ back upanticollision alarm is studied. When the distance reaches the limitpoint, the alarm can give out sound and Light alarm,reminding drivers to brake.The design includes sending,receiving and alarm.Signal is sent and received by ultrasonic transducer,which isequipped with directivity. piezoelectric element is used ,generallycalled RZT. In anticollision circuit, acousto-optic anticollisionis applied for voice alarm. This designing adopts the commoncomponent of domestic manufacturers, with low costs, reliableperformance, and it is easy to be popularized.
Key words: ultrasonlccar’back up anticollision alarmsensor
ABSTRACT
The basic designing principle of the automobile anticollisionsystem and the problems existed in the domestic and internationalare analyzed. In this paper, Not only ultrasonic range meteringsystem also principle ,methods and procedures of the designaccording to the design were introduced. The car’ back upanticollision alarm is studied. When the distance reaches the limitpoint, the alarm can give out sound and Light alarm,reminding drivers to brake.The design includes sending,receiving and alarm.Signal is sent and received by ultrasonic transducer,which isequipped with directivity. piezoelectric element is used ,generallycalled RZT. In anticollision circuit, acousto-optic anticollisionis applied for voice alarm. This designing adopts the commoncomponent of domestic manufacturers, with low costs, reliableperformance, and it is easy to be popularized.
Key words: ultrasonlccar’back up anticollision alarmsensor
目錄
第一章 緒論 1
1.1 選題意義 1
1.2 汽車倒后防撞報警器的研究現(xiàn)狀 1
1.3本論文的特色 2
第二章 報警器的相關技術介紹 3
2.1傳感器類型的選擇 3
2.1.1傳感器的主要類型 3
2.1.2 倒車過程中選用的傳感器 5
2.2測距原理 5
2.2.1 倒車過程中的測距原理 5
第三章 報警器的硬件電路設計 7
3.1 倒車過程中的防撞報警器的硬件設計 7
3.1.1整體設計 7
3.1.2超聲波發(fā)射電路 7
3.1.3超聲波接收電路 8
3.1.4篩選電路 9
3.1.5整形電路 9
3.1.6 語音錄音電路 10
3.1.7放音電路 11
3.1.8 總電路圖 12
第四章 報警器的軟件設計 15
4.1 倒車過程中的防撞報警軟件設計 15
第五章 結論與展望 19
5.1 結論 19
5.2 展望 19
致謝 21
參考文獻 23
附錄 25
