Air University Isl amabad Note: If you are seeking for a digital logic design project, then try to create a new project using this project as a module. The suggestions are making an acceleration meter or speed detection of a vehicle for 1m. E-mail: [email protected]
Speed Measuring Circuit
Jun 24, 2015
Circuit for Digital Logic Design project.
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Air University Islamabad
Note: If you are seeking for a digital logic design project, then try to create a new project using this project as a module. Thesuggestions are making an acceleration meter or speed detectionof a vehicle for 1m.
E-mail: [email protected]
Air University Islamabad
SPEED MEASURING SYSTEM
DLD Term Project
Air University Islamabad
1. Ahmad Rasheed
2. Haseeb Sarwar
3. Mashood Ahmad
Group Members:
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Contents1. Introduction
2. Theme
3. Circuit Module Distribution
4. Time Calculation Module
5. Division Module
6. Final Compilation
7. Questions
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Introduction
The circuit will measure speed of the body
(vehicle) passing through the two fixed points.
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Theme
The basic theme was first to calculate the time of
the body passing through the two fixed points and
calculate its speed using the formula
Speed=Distance/Time
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Circuit Module Distribution
Time Calculation Module
Approach 1 Approach 2
Division Module
Quotient Calculation Remainder Calculation
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Time Calculation
• Approach 1
• Approach 2
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Time Calculation Starting Module
Reset switch
Sensor
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Time Calculation Module Approach 1starting module
starting module
counter
counter
clocksubtractor
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Time Calculation Module Approach 2
clock
starting module
starting module
counterXOR
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Cases Reset Sensor 1 Sensor 2 XOR output Counter
1 ON “1” ON “1” ON “1” 0 Cleared
2 OFF “0” ON “1” ON “1” 0 Not working
3 a. OFF “0” OFF “0” ON “1” 1 Starts working
3 b. OFF “0” ON “1” OFF “0” 1 Starts working
4 OFF “0” OFF “0” OFF “0” 0 Stops at a value
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Advantages of Approach 2 overApproach 1
The number of ICs reduced that made hardware to be handled more easily.
Initial point for vehicle crossing in order to measure speed became independent.
The circuit became less costly.
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Division Module
counter
mux
subtractor
JK-FF
Reset switch
register
clock
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Final CompilationFinally we gave the output of the time calculation
circuit into the divisor place of the dividing circuit
that resulted in the measurement of speed.
Air University Islamabad
Questions
?
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