ULTRASONIC RANGE FINDER

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ULTRASONIC RANGE FINDER

• AMITHASH .E. PRASAD
• ARUNDATHI .B.S.
• BHUVANESHWARI .G
• SUSHMA .M

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AIM OF THE PROJECT

• NON CONTACT MEASUREMENT OF
• DISTANCE OF AN OBJECT USING
• ULTRASOUND

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OBJECTIVES OF THE PROJECT

• To design a handy device for non-contact
  measurement of distance.
• For measurement of shorter distances only.
• Using a microcontroller for better
  understanding of its functioning.
• Less cost manufacture.

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ULTRASOUND ???

• These are waves of frequency greater than 20KHz.
• They travel with velocity of sound.
• Because of shorter wave length they travel as
  sharp beam.
• They undergo reflection.

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BLOCK DIAGRAM
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INTERNAL STRUCTURE OF ULTRASONIC TRANSDUCER
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TRANSMITTER
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TRANSMITTER
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RECEIVER
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OPERATIONAL AMPLIFIERS
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ENVELOPE DETECTOR
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COMPARATOR
0.4V
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SIGNAL HOLD CIRCUIT
CCP
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1.5ms
RA5 enable output pin goes high
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PIC LED INTERFACE
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PROCESS EXPLANATION
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FLOW CHART
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CAPTURE PROCESS
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THE LED DISPLAY
7 SEGMENT COMMON ANODE
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LED INTERFACE
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APPLICATIONS

• Robotics Automation
• Car backing System
• Exploration

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FURTHER DEVELOPMENT

• Assistance for the blind
• Velocity meter
• Long range and short range mode selection.
• PC interface.
• Periphery mapper.