單片機(jī)外文翻譯--轉(zhuǎn)速表與單片機(jī)-單片機(jī)-全文預(yù)覽
【正文】 integrated circuit The traditional automobile rotational speed odometer39。 second, records the automobile travel with the mechanical counter the accumulation course. The modern automobile is developing to the high speed direction, along with the vehicle speed enhancement, the tradition speedometer which actuates with the flexible axle receives the unprecedented challenge, this is because of the flexible axle when high speed revolving, as a result of steel wire alternate stresses limit limit, but easy to break, simultaneously, the flexible axle will arrange long will have presented the deformation oversized or the movement sluggish and so on phenomena, moreover, regarding the different vehicle type, the rotational speed odometer39。s measuring appliance already eliminated displaces is present39。s circuit design, considered many disadvantageous use environment, enable the instrument as far as possible in the voltage, the temperature, the humidity, the dust pollution and so on under plex change factor many conditions to be able the steady work. 2nd, the reliability is good. In order to enhance the electric circuit work the 2 reliability, not only the part passes through screens carefully, moreover passes through 2400 hours to roast machine the experiment, its outer covering is exquisite, may install conveniently in the pocket, momentarily may take the use. 3rd, simplicity of operator, easy to operate. Only needs to insert to the cigar lighter on, does not need to get out, all OK. 4th, the use security, felt relieved. Even if meets instead, also will not damage the instrument, will not damage on the vehicle anything. 5th, the speed may adjust. You may the speed regulation highest, may also adjust to a fixture, for instance 300 step. Is different based on the vehicle type, the speed differs from, may the speed knob change speed through the regulating instrument on. Monolithic integrated circuit AT89C2051 by its low price, the low power loss, the reliability high and easy to program and so on characteristics to be famous, X25045 is a MCS51 series monolithic integrated circuit electric circuit39。s angle of view contrast gradient. Chip X25045 is Xicor Corporation promotes has programmable μP monitor39。s operating temperature scope width may reach 55℃ ~150℃ . this design realizes the course by monolithic integrated circuit AT89C2051 to accumulate, the subtotal, the reset and the memory, and actuates the cross coil meter by the LM1819 integrated circuit, thus has realized the vehicle speed instruction. Again using Hall sensor transmission signal. Realizes this design proposal cost to be inexpensive, the indicator stability is good, the speed of response is quick, the antiknocking property is strong, the reliability and the performancetoprice ratio are very high. After the actual use proof, this odometer definitely may substitute for the tradition the speedometer which actuates by the flexible axle. Certainly, this is only one kind realizes the plan, may also actuate the cross coil meter by the monolithic in
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