目 錄
摘要 2
關(guān)鍵字 2
引言 2
1 概 述 3
2 車輛限重系統(tǒng)硬件電路的設(shè)計(jì) 3
2.1電阻應(yīng)變式傳感器 4
2.2 稱重傳感放大電路 5
2.3 稱重傳感電路的安裝 5
2.4加法運(yùn)算放大電路 6
2.5  ADC0804模/數(shù)轉(zhuǎn)換器 6
2.6 8051單片機(jī) 8
2.7  驅(qū)動(dòng)電路 9
2.8  GPS模塊簡(jiǎn)介 10
2.9 車輛限重系統(tǒng)中電源的設(shè)計(jì) 11
2.10 車輛限重系統(tǒng)的總設(shè)計(jì)電路圖 11
3  車輛限重系統(tǒng)的電路隱埋 13
4  車輛限重系統(tǒng)軟件的設(shè)計(jì) 14
4.1車輛限重系統(tǒng)軟件設(shè)計(jì)流程圖 14
4.2軟件設(shè)計(jì)的分析 16
4.3車輛限重系統(tǒng)的程序 16
5 小 結(jié) 18
致謝 18
參考文獻(xiàn) 18
英文摘要 21

車輛限重系統(tǒng)電路設(shè)計(jì)

摘要：由于現(xiàn)在車輛超重現(xiàn)象嚴(yán)重，車輛限重系統(tǒng)的設(shè)計(jì)意義較為重大。本設(shè)計(jì)在現(xiàn)有普通車輛的基礎(chǔ)上，安裝了電阻應(yīng)變式傳感器，利用電阻敏感元件組成的惠斯登平衡電橋以及其電路輸出電壓與重量成線性關(guān)系的原理來(lái)稱重，隱埋了稱重傳感放大電路、A/D轉(zhuǎn)換器ADC0804、Mcs-51系列8051單片機(jī)、加法器以及DC-DC電源等。當(dāng)車輛超重時(shí)，通過(guò)單片機(jī)的預(yù)置程序，使驅(qū)動(dòng)電路工作，讓控制車輛油路和控制車輛電路的繼電器動(dòng)作，對(duì)超重車輛進(jìn)行管制，達(dá)到限制其啟動(dòng)的目的。此時(shí)一并發(fā)送超重信號(hào)給GPS，GPS與交通部門(mén)通訊，GPS定位超重車輛，交通部門(mén)用GPS向單片機(jī)反饋不同的信號(hào)，來(lái)決定對(duì)超重車輛的處理。當(dāng)車輛不超重時(shí)，單片機(jī)程序判斷后，使驅(qū)動(dòng)電路不工作，不限制車輛的啟動(dòng)。                 
關(guān)鍵字：稱重傳感器；單片機(jī)；電路隱埋　

Design of the Heavy System of the Vehicle Limit

Abstract: As the phenomenon overweight of vehicle is serious now， the design significant of the heavy system of the vehicle limit is comparatively great. The design of the existing vehicles on the basis of the installation of the resistance strain sensor， use of sensor resistance of the Wheatstone bridge and balance their circuit output voltage and the linear relationship between the weight of the principle to weight. Implicit buried weighing sensor amplifier， A/D converter ADC0804， Mcs-51 series 8051 MCU ， adder and DC-DC power supply and so on.. When the vehicle is overweight， with procedure of presetting of MCU， it urge the circuit work to make， it control vehicle oil passage and control relay movement ， vehicle of circuit to let ， control the vehicle overweight， achieve the goal of limiting its start. At this time MCU send the signals overweight to GPS ， GPS makes communication with the traffic department ， the vehicle overweight of GPS's positioning in the lump at this moment ， the traffic department feedbacks different signals to the MCU with GPS， to determine the treatment to vehicle overweight. When the vehicle is not overweight ， drive circuit does not work， restrictions on the launch vehicle ， after procedure judges the MCU.
Keywords: Weighing sensor; MCU system  ; Circuit buried