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HANBOSODHAND HELD BODY SOUND DETECTOR

AHSEL AHMED MADARIAJUNRAJ M.

BOBIN CHANDRADASBEXO CLEETUS

MOHAMMED

COCHIN UNIVERSITY OF SCIENCE & TECHNOLOGYDIVISION OF ELECTRONICS & COMMUNICATION ENGINEERING

SCHOOL OF ENGINEERING

Presented by

ECEBATCH ASEMESTER VI

2008-2012

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PROJECT OVERVIEW

A reliable & portable system which canbe effectively used to trace the

presence of life by detection of bodymovements, distress signal, breathing

and heart sounds etc.

HANBOSODHAND-HELD BODY SOUND DETECTOR

7/4/11 Division of Electronics, SOE,CUSAT 22

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CONTENTS

q Introductionq Aimq

Block diagramq System Stagesq Hydrophoneq IC OP27q IC LM386q Circuit Diagram

q CircuitDescription

q PCB Layoutq PCB Fabrication

Stagesq

F.A.Q.q Future Scopeq References


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INTRODUCTION

Man cannot escape the savages of nature.

He can fall victim to natural calamities

like....


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EARTHQUAKES

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LANDSLIDES

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HURRICANES

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AIM

To develop a simple and portable system thatdetects body sounds from a distance and feedsthe signal to the operator.

To develop a life detection system that is costeffective and accessible by common man.

To evaluate the feasibility of the mass productionand distribution of the system.


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BLOCK DIAGRAM

TRANSDUCER

(HYDROPHONE)

LOW NOISEAUDIO POWER

AMPLIFER

LOW NOISEPRECISION LOW

PASS FILTER

LOW NOISETRANSMISSION

CABLE

SPE

AKER

SPEAKER

LIFE TRAPPED

UNDERNEATH

DEBRIS


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SYSTEM STAGES

Transducer (Hydrophone )

Low noise transmission cable

Low noise Low pass filter

Low noise Audio Power Amplifier7/4/11 Division of Electronics, SOE,CUSAT 1010

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HYDROPHONE


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HYDROPHONE

A transducer designed to be usedunderwater for recording or listening tounderwater sound

Piezoelectric

Multiple hydrophones can be arranged

in an array so that it will add thesignals from the desired direction


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IC OP27


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IC OP27

Operational amplifier which combinesoutstanding noise performance withexcellent precision and high speedspecifications.

Wide band noise is only 3nv/hz

Excellent choice for low-noise amplifierapplications


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IC LM 386


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IC LM 386

Power amplifier designed for use in lowvoltage consumer applications.

Gain is internally set to 20.Addition of an external resistor and

capacitor will increase the gain to any

value from 20 to 200.Quiescent power drain is only 24 mwwhen operating from a 6V supply


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CIRCUIT DIAGRAM


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CIRCUIT DESCRIPTION

Transducer detects signs of life, and

sends the electrical equivalent input ofit through the transmission cable tothe conditioning circuitry.


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CIRCUIT DESCRIPTION

The signal is filtered by a Low Pass Filterusing IC OP27, which greatly reduces thefront-end noise and remains very stableto spurious signals.


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CIRCUIT DESCRIPTION

The filtered signal is then amplified by a LowNoise Audio Power Amplifier to sufficientamplitude and is fed to Speaker/Headphone.


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PCB LAYOUT


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FAQs

Why the use of 3M SCTOCHCAST2130 resin?

Forms an appropriate insulation to thetransducer head

Protects from direct exposure to hostileenvironment

Noise reduction

Viscous co-efficient value controls the7/4/11 Division of Electronics, SOE,CUSAT 2222

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FAQs

Why the use of 2 Core ShieldedRubber Sleeved wire ?

Less susceptible to electrical noise

Suited for Low-frequency operation

Better performance than Plastic sleeved Wire

Reduces Physical disturbances


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FAQs

Why the use of Gold-platedConnector ?

Helps maximum noise reduction atthe joint

Minimum resistance

Corrosion Resistant


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FUTURE SCOPE

Integrated Multi-purpose rod

HANBOSOD can bemade a multi-purposerescue detectionsystem by the inclusionof gadgetries like Metal

detector, Smokedetector, Spy cam,Heat sensor etc.


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FUTURE SCOPE

Thermal Imager

Detection of life canbe made moreeffective inconditions of low

light; by creating aimage based on theheat signatureproduced by a bodyor an object.


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FUTURE SCOPE

Laser aim

A Laser beam can beused to pin-point thesource of signal bymounting it on the

transducer head.


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FUTURE SCOPE

Buzzer add-on

Detection process

can be made instantand real-time bymaking a buzzerbeep by the

inclusion of acircuitry which canidentify thebiological rhythm inthe detected signal.


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REFERENCES

Websites

Google Patents : www.google.com/patents

Wikipedia : www.wikipedia.com

Data Sheets : www.alldatasheets.comAll Experts : www.allexperts.com

3M Scotchcast resin : www.3m.com

Textbooks :

Electronic Design & Circuits Dr. B. Gupta

http://www.google.com/patentshttp://www.wikipedia.com/http://www.alldatasheets.com/http://www.allexperts.com/http://www.3m.com/http://www.3m.com/http://www.allexperts.com/http://www.alldatasheets.com/http://www.wikipedia.com/http://www.google.com/patents

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Thank You

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