The Design of bicycle speed measuring system
based on single chip microcomputer
ABSTRACT
With the rapid development of technology, more and more widespread application of
microcomputer, promote the traditional control detection technology constantly updated.
Most of the current electronic odometer, and with the LED digital tube or LCD display
r e a l - t i m e , d i s p l a y m o r e i n t u i t i v e . E l e c t r o n i c o d o m e t e r f l e x i b l e s h a f t u s i n g t h e c o n t a c t
s p e e d s e n s o r i n s t e a d o f d r i v i n g , m i l e a g e t a b l e s c a n b e i n s t a l l e d w i t h o u t d i s t a n c e
limitations, and further to effectively overcome the mechanical disadvantages of mileage
in the table.
T h e p l a n a d o p t s t h e s y s t e m a n d c o n f i g u r a t i o n o f c o m b i n i n g t h e m i c r o c o n t r o l l e r
S T C8 9 C 52 a s t h e m a i n c o n t r o l c o m p u t e r , u s i n g t h e p h o t o e l e c t r i c s e n s o r b i c y c l e
o d o m e t e r , s p e e d m e a s u r i n g d e v i c e s . w h e n D i f f e r e n t s p e e d p u l s e s i g n a l s o f d i f f e r e n t
f r e q u e n c i e s p r o d u c e d b y s e n s o r a r e i n p u t i n t o t h e m i c r o c o n t r o l l e r , a f t e r i t s c a l c u l a t i o n ,
liquid crystal will display the datas, making the bike's speed and distance data visually to
the user.
The design includes a bike wheel pulse acquisition, keyboard input and data display
s e c t i o n , t h e m a i n p r o g r a m u s i n g C l a n g u a g e , T h i s p a p e r f i r s t n e e d e d t o " m i l e s t o n e s "
design of equipment in detail, on the problems existing in the design, explained And then
to hardware and software design and implementation of the part made earnest analysis,
T h e n p r e s e n t e d s y s t e m m o d e l i n g p r o c e s s a n d t h e c o r r e s p o n d i n g s y s t e m b a s e d o n t h i s
model, the control simulation, and the simulation results are compared.
KEY WORDS odometer photoelectric sensor, MCU, LCD, Tachometer
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