英文参考文献原文复印件及译文
every single day专 业：
姓 名：
学 号：
brand new**** * *
完成日期 天津学校 2016 年 4 月
Bad on monolithic integrated circuit's
multi-purpo rental car mileage除此之外英语
fare meter's design
杰森 科林斯Abstract: Introduced that one kind take monolithic integrated circuit A T89S52 as the core multi-purpo rental car mileage fare meter's design, elaborates in the software and hardware design process key technologies processing. The simulation result indicated that this mileage fare meter has the collection idea regulation, the time, the cost, the memory, the examination, the statistics and so on many kinds of measurement functions, and has the overspeed reminder, to prevent the driver to cheat, the pronunciation, the printing and the demonstration and so on many kinds of functions. Compares with the existing system, this system has the overspeed reminder and so on a stronger function.
1 introduction
1 introduction the rental car mileage fare meter is the rental car transport business charge special-purpo intellectualized measuring appliance, along with electronic technology's development, the rental car mileage fare meter technology unceasingly is also progressing and enhances. The domestic rental car mileage fare meter had already experienced 4 stage development. From the tradition completely the mechanical type whi
ch is compod of the mechanical primary device, namely replaces the part mechanical primary device's rental car mileage fare meter to half electronic formula with the electronic circuit; Again from integrated circuit type to prent monolithic integrated circuit system design rental car mileage fare meter. The rental car mileage fare meter cost is whether accurate, the taxi driver whether overspeed is the pasnger most issue of concern, but mileage fare meter transport business data management whether facilitates is the taxi driver most pays attention. How therefore to design one kind both to be able to prevent the driver to cheat effectively with overspeed and can facilitate driver's mileage fare meter especially important. Therefore, this article as the core designs a model of multi-purpo rental car mileage fare meter take monolithic integrated circuit A T89S52, this mileage fare meter can realize the cour valuation and the demonstration, the data storage and the inquiry, the clock demonstrated that the overspeed reminder, the pronunciation disminate news with functions and so on bill printing. It is more convenient than the market in some mileage fare meter u, function entire, but also has prevents the driver to cheat effectively with the system stability good merit. In which overs
peed reminder function may remind the driver and the pasnger, warned that the driver do not want to exceed the speed limit, avoids traffic accident's occurrence.
2 System hardware structure and function characteristic
2. 1 Overall plan
Overall plan design block diagram as shown in Figure 1, the overall system by monolithic integrated circuit The T89S52 control circuit, A44E Hall nsor electric circuit The T24C02 storage circuit, the DS1302 clock circuit, the ISD2560 pronunciation disminates news the electric circuit, the bill marking circuit, the presd key alignment circuit, the MAX7219 actuation display circuit and the power circuit is compod. The monolithic integrated circuit gathers and judges the spatial headlight signal and the distance examination nsor signal, when the rental car starts, the monolithic integrated circuit examines the Hall nsor's signal impul and carries on the cour computation. When does not have the pasnger, the monolithic integrated circuit transfers the real-time time chip DS1302 procedure and the MAX7219 rial port demonstration driver, carr
ies on the clock demonstration with 4 L ED; The headlight breaks off when in the sky pasnger loading: The ISD2560 pronunciation disminates news the electric circuit to carry on the pronunciation to disminate news 1 (welcome pasnger to ride this rental car), through the DS1302 gain time information resolution daytime/the evening, then transfers The T24C02 procedure gain daytime/evening's unit price and the outt price, then starts information and so on valuation and tell time, cour and amount; The headlight gets the pasnger to get out in the sky time: Carries on disminates news 2 (thanks rides this rental car once more, plea hand over amount), and prints the good bill, the monolithic integrated circuit saves transport business data message to 24C02, waited for after the rental car starts once more, single information ret replacements and so on amount and cour, complete a valuation in light of this.他妈的用英语怎么说
2. 2 Hardware circuit design
By the power unit, the Hall nsor distance survey part, the data demonstrated that the part, the clock part, the pronunciation disminate news the part, the bill printing part and
the data storage part and so on compo, various part of ports are parately connected with the monolithic integrated circuit AT89S52 outlet, realizes mileage fare meter's function through monolithic integrated circuit's control to realize.
2. 2. 1 Power unit
英语成语故事Becau mileage fare meter's working conditions are quite bad, it requests to have the anti-vibration, the anti-high low temperature, anti-moist, abilities and so on anti-electromagnetic interference, when specially the power source aspect's disturbance, like the rental car starts, the engine flame, the storage battery charge and so on create input the mileage fare meter + 12 V power sources not to be unstable. Therefore us + 12 V storage battery power sources after the filter and the power source constant voltage management chip 7805 obtains + 5 V regulated voltage outputs, the guarantee overall system can the normal work.
2. 2. 2 Distance survey part
In the rental car needs one to be able to obtain the wheel rotation is the distance measurement signal installment accurately, by obtains the standard signal impul to nd in the monolithic integrated circuit fixed time/counter T1 is P3. 5 pins, completes 100 time after monolithic integrated circuit's T1 tally function counting have an interrupt to complete the distance the survey. (suppos wheel perimeter is 1 m, then the Hall nsor produces 100 the pul then to express that every time vehicle traveling schedule 0. 1 km, has carried on establishment according to actual situation in procedure). The automobile shaft coupling according to the circle spacing inrting magnet steel, with Hall the nsor integration chip A44E examination and the output pul, Hall nsor integration chip A44E has functions and so on signal conversion, voltage amplification, reshaping output, to increa its antijamming ability, pass through 74L S14 after the signal shaping the transmitted light occasionally nds in P3 again. 5 pins. But in this electric circuit to prevent the driver to make the shortcoming, may u the encryption nsor's method, first counter impul encryption which gathers to the Hall nsor, caus the cost pul by the scrambled text way transmission, finally the decipher is the
definite orders pul, transmits to the mileage fare meter cost. In password nsor, what the encryption transmits to the decoder is the password, when the encryption and the decipher inherent password is the same, decoder only then to mileage fare meter transmission counter impul, mileage fare meter only then cost, therefore, the password nsor enhanced the mileage fare meter cost reliability, the illegal taxi driver is also unable to make the fare to increa, simultaneously the driver cannot replace the mileage fare meter nsor cretly, realized the mileage fare meter to unify the installment, the rvice and the annual inspection global administration by the National Measurement Department.
effort是什么意思
