计算机控制汽车安全语音提示系统外文翻译-汽车设计(编辑修改稿)

计算机控制汽车安全语音提示系统外文翻译-汽车设计(编辑修改稿)内容摘要：

ows vehicle course Central Africa, is frequently dangerous. Therefore in this system spoil frequently some point using driver in the course of traveling to move brake movement, detection tyre and the slip rate of road surface ( racial of drive wheel and the bad speed of rotational speed of undrive wheel of drive wheel), and the accordingly estimation condition of road surface. And beg the specific practice of slip rate is the sensor of rotational speed of edd current installation in drive with undrive wheel on, measure the difference of rotational speed , so making slip rate finally in order to remind that driver 4 reduces speed. softwares The main program block diagram shows as . The subprogram of speech sound shows as . After system starts eclectricity , main program first plete initialization work includes setting up storehouse indicator , sets initial value and the working way of timer/counter, put relevant storage element initial value, start timer/counter open suspend and so on. Then shiping inquire each state input line, looking over whether needs report to alarm. For instance, when sensor detection going to automobile is backing a car,ＣＰＵ choose want trigger project address, then, starting to project circuit and begin to reckon by time , in the given time if taking over signal from postpone time can calculate barrier arrive to project a little distance. If taking over signal in the given time do not think that barrier far from projects a little distance have exceeded the distance taken over, then project/again to take over next project a little signal. According to the signal taking over and calculating the result, after judging vehicle left or right whether have barrier. In design using the timer of 8031 Ｔ 0 reckon by time , in week , with the counter of 8031 Ｔ the pulse that 1 sends for the wheel sensor of rotational speed count. Setting timer Ｔ 0 is 250μｓ , therefore in timer Ｔ 0 spill over to suspend service program in, basis whether spill over 2020 times e to judge whether arrival , at the same time for the calculation of wheel rotational speed and slip rate, is also pleted in suspend service program. When reporting to alarm, the subprogram of speech sound used ( ) are the important link of regenerative speech sound, major function is will control order write in Ｔ 6668 e to realize speech sound revive. Using various sensors, this system can detect various dangerous condition and send the speech sound in time report to alarm , being against contracting in unran, avoiding to occurs the accident and bees the good assistant of driver safely trip vehicle. This technology is willing to seek investor and cooperative partner. UNIT TWO： The 8051single chip microputer 8051 is the representative product in the MCS51 series single flat mictoputer, it has integrated inside the center with the powerful function processor, and have contained hardware to multiply the 8 parallel mouthes of divider, the 21 control registers for special purpose, the program memory of 4 kB, the data memory of 128 bytes and 4 groups , two 16 but editing processor as well as the serial mouth of programming timer / counter and a whole duplex operation. MCS51 have parison big seek address space, address line width reaches the piece of 16, external data memory and program memory seek the address scope reaching to 216 = 64 kB, which 5 has been larger as only the flat microputer control, at the same time which have for the mouth of I/O visit ability. Besides, MCS51 adopts modular structure, but a convenient emendation modular can draw the patible new product of foot and instruction. So, make product form seriation easily. The working frequency of MCS51 single flat microputer is 212 MHz, when vibration frequency is 12 MHz, a machine period is 1 us, the speed should be said that it is more rapid. 8051 in integrated perfect various su。