【正文】 s ?nal decision about the parking place[19].During the past two decades, traffic authorities in many cities (Helsinki, Cologne, Mainz, Stuttgart, Wiesbaden, Aalborg, Hague) have started to inform and guide drivers to parking facilities with realtime variable message signs [directional arrows, names of the parking facilities, status (full, not full, number of available parking spaces, etc.)]. Information about the number of available parking spaces could be displayed on the major roads, streets and intersections, or it could be distributed through the Internet.It is logical to ask the question about the bene?ts of the parking guidance systems. Current practice shows that parking guidance systems usually do not change the occupancy rate or average parking duration. Drivers easily bee familiar with the parking guidance systems, and majority of them use, thrust and appreciate the help of the systems[20].Guidance systems signi?cantly increase the probability of finding vacant parking space, mitigate frustration of the drivers–visitors unfamiliar with the city center, decrease the queues in front of parking garages, decrease the total amount of vehiclemiles traveled (particularly in the city centers), decrease the average trip time, energy consumption, and air pollution. Parking guidance system is a part of prehensive parking policy and traffic management system, whose other elements are street parking control (including sanctions for the illegally parked vehicles), parking fare structure, and parking revenue management system.Parking guidance systems help drivers to ?nd vacant parking spaces when they are already on the network, and approaching their ?nal destination. Throughout this research the concepts of the parking reservation system and parking revenue management system are proposed. The proposed methodology could be applied for parking lots and parking garages in cities and at the big international airports.The paper is organized as follows: Parkingpricing problems are presented in Section 2. Analogies between parking problems and some other industries are presented in Section 3. The parking revenue management system is introduced in Section 4, and the Intelligent parking space inventory control system is introduced in Section 5. The algorithm to create intelligent parking spaces inventory control system is presented in Section 6. Results obtained with the ‘‘intelligent’’ parking system are given in Section 7, and Section 8 presents the concluding remarks and further research orientations.1. parking pricingIn majority of cities throughout the world drivers pay for using different parking facilities. In some instances, traffic congestion can be significantly reduced as a result of parking price. The parking revenue is usually used to cover parking facility costs (access gates, ticket printers, parking meters, parking signs, attendants), or to improve some other traffic and transportation activities. Different parking pricing strategies should be a part of the prehensive solution approach to the plex traffic congestion problems. There is no doubt that parking pricing represents one of the important demand management strategies. For example, traffic authorities, local governments and private sector could introduce higher parking tariffs for solo drivers or for longterm parkers in congested city areas. They could provide special parking discounts to vanpoolers. Obviously parking pricing should be carefully studied in the context of the considered city area (downtown, residential, mercial, retail use areas).In some cities (Madison, Wisconsin) there are already time dependent parking fees that force muters to switch to diffierent alternatives of public transportation. Trying to promote public transit San Francisco traffic authorities increased parking tariffs at public and mercial garages. The Chicago authorities raised parking rates few times. Authorities in Seattle signi?cantly reduced parking tariffs for carpool at two Seattle parking facilities in downtown. Active role in parking pricing strategies could also have employers paying for employees39。即將開(kāi)始新的歷程，對(duì)我的后來(lái)著們予以祝福，且行且歌且珍惜。而在畢業(yè)之際，我還要向他們一一表示感激，盡管或許他們并不圖報(bào)什么。謝 辭對(duì)于這次畢業(yè)設(shè)計(jì)，從選題、查閱資料、寫(xiě)論文等等，每一步都離不開(kāi)莊老師的悉心指導(dǎo)和親愛(ài)的同學(xué)的熱心幫助，我真的非常非常地感謝他們，真的是在他們不斷的幫助和指導(dǎo)下才能把大學(xué)最后的論文給做完。3. 由于條件及時(shí)間方面的關(guān)系，現(xiàn)場(chǎng)應(yīng)用中仍有可能存在一些未曾發(fā)現(xiàn)的問(wèn)題或者干擾，這就是在已有系統(tǒng)功能基礎(chǔ)上進(jìn)一步改進(jìn)和完善。對(duì)于小區(qū)停車(chē)場(chǎng)系統(tǒng)的研究還在繼續(xù)，雖然經(jīng)過(guò)大量的實(shí)驗(yàn)證明該設(shè)計(jì)方案是可行的，但需要更加進(jìn)一步的提高，本設(shè)計(jì)還需要更加一步地提高，在此基礎(chǔ)上，還可以做以下改善：1. 由于同一檢測(cè)模塊需對(duì)兩路4個(gè)線(xiàn)圈進(jìn)行檢測(cè)，如何更好的避免線(xiàn)圈間耦合效應(yīng)是需要重點(diǎn)考慮的問(wèn)題，目前的方法是給四路振蕩器設(shè)置不同的振蕩頻率，若能使系統(tǒng)對(duì)通道逐個(gè)掃描將可以更好的解決這個(gè)問(wèn)題，為不同外界環(huán)境下選擇最合適的檢測(cè)頻率提供更大的靈活性。地感線(xiàn)圈的應(yīng)用使得對(duì)車(chē)輛的檢測(cè)準(zhǔn)確無(wú)誤，保證了系統(tǒng)的可靠性。 delayms(100)。 if(d=100) hanzi(0,0,4號(hào)車(chē)位有車(chē))。 if(c=100) hanzi(0,0,3號(hào)車(chē)位有車(chē))。 if(b=100) hanzi(0,0,2號(hào)車(chē)位有車(chē))。 if(a=100) hanzi(0,0,1號(hào)車(chē)位有車(chē))。 c=Sonic3()。 //初始化結(jié)束 串口打印OK信息 while(1) { a=Sonic1()。//超聲波初始化 initlcd12864()。//串口初始化，方便系統(tǒng)調(diào)試 Delay_Configuration(72)。 GPIO_Configuration()。 } }//主函數(shù)內(nèi)容int main(void){ u8 a,b,c,d。) { write_date(*z)。 while(*z!=39。 pos=x+y。 if(x==2) x=0x88。 if(x==0) x=0x80。GPIO_InitStructure)。 = GPIO_Mode_Out_PP。 = GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_10。 GPIO_Init(GPIOx, amp。 = GPIO_Speed_50MHz。 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOx|RCC_APB2Periph_GPIOy,ENABLE)。 delayms(5)。//整體顯示開(kāi) 游標(biāo)關(guān) 游標(biāo)位置關(guān) delayms(1)。 delayms(1)。 } }//12864液晶顯示模塊初始化//初始化液晶，引腳初始化，發(fā)送初始化命令void initlcd12864(){ GPIO_Config()。 value2=0。 if(value1!=0) {