智能小车 毕业论文（设计）外文翻译

1.1 photoelectric detection module design

The intelligent car was stuck on the black line running on white

paper road ,so this module design need to detect shop on the black rubber belt drive area, including run straight along the arc district and driving district two area, becasure of the black and white paper to light reflection coefficient is different, can according to receive reflected light.

The strength of the judge road the black line. This paper USES is

simple and practical detection methods .namely the infrared detection method.

Infrared detection method, I,e, use infrared ray in different

colors of physical surface with different reflection properties. In the car driving process continually to the ground to launch the infrared, when the infrared met white ground occurs when the reflected light, aimless and launch packed on the car of receiving tube receiving less than signal.

1.2 signal comparative module design

This part design USES aLM324 comparator, of sensor signal voltage

received compare and amplified ,and will compare the result after feed to the microcontroller, used to detect sensor sensitivity, when two sensors simultaneously detect light ,straight forward. When the sensor can’t detect light, in cut-off state, double LM324 operational amplifier output low level to microcontroller, by program processing, if left not detect light, then left correct direction; if thf right has not been detected light, then turn correct direction.

1.3 motor control and driving module design

Because use is double drive cars ,this part of the circuit must be

able to output of two different voltage values, respectively to controlling trolley right and left two motor drive ,the two of the wheel speed and direction of the same or different, thus to control its advance and turning .in system design process, use two L910 chips to connect SCM and dc motor respectively .L9110 is for control and drive motor design

two channels push-pull power amplifer application-specific integrated circuit device, discrete circuts in monolithic IC integrated such that the peripheral equipments in lower cost and the whole machine can carry on sexual high. The core slice two a TTL/CMOS and let electricity flat lose into, have good anti-jamming, two output terminal can pick flooding dynaic electric machine straight to the shipment of positive reverse move and it has had a big electricity flow flooding dynamic can force each call way can pass over 800ma continuous current, peak current capacity of 1.5-2a; at the same time it has lower output saturation pressure drop and the static electricity, the built-in clamp a diode can release the perceptual load of reverse current impulse, making it thf drive relays, dc motors,steeping motor or switch power tube the use of safe and reliable.

Follwing tracing car system to common AT89C51 ,complementary with

relativel simple components and circuit design ,the smooth completion of follow under the premise of tracing function, and fully considered appearance, cost, so most of the circuit car by mannual weiding is complete, in the design ,we never in a circuit increase redundant functions, but retained various hardware interface and software subroutines interface to facilitate the expansion and development after.

二.system software design

This system software modular structure ,the main progrem,initial

anti-fuzzy procedures, interrupt subroutines ,delay subroutines,buttons pronunciation subroutines buttons scanning subroutines constitutes.

2.1 tracing subroutines desin

Tracing module is designed by the left right photoelectric sensor

output terminal receiving monolithic machine respectively, P22and P23 tube feet, then through the microcontroller programming, produce PWM control signal, through L298 control motor speed, let the car to move forward, left turn ,turn right and stop driving purpose.

2.2avoid barrier of programming

Obstacle avoidance module is designed by the infrared reflection

sensor module around the output terminal receiving MCU respectively P20 and P21 tue feet, then through the microcontroller programming, produce PWM control signal ,through L298 control motor speed ,let the car to move forward ,left turn ,turn right and stop driving purpose.

2.3 remote subroutines design

Remote control module is designed by the infrared sensor 1838 an

output terminal of the receiving MCUP 32 tube feet ,then use all-purpose remote control on the remote control,then let microcontroller decoding, produce PWM control signal ,through L298 control motor speed, let the car to move forward, left turn ,turn right and also stop driving purpose. 三 summary

Adopts singlechip ,using photoelectric sensor and infrared reflection sensor was designed as a detection system, can realize automatic homing line to work, automatic obstacle avoidance, alarm and remote control functions such as intelligent car. This design is the obvious advantages of simple circuit, reliability, low cast, and very easy to function of further perfecting and expansion.