1 Smoke Detector ∗ Sardar Nimisha Sankhe∗ ‚ Nisarg Vinod† and Ekta Vira Patel Institute of Technology‚ Mumbai-400058‚ India‚ nimisha.sankhe@yahoo.com † Sardar Patel Institute of Technology‚ Mumbai-400058‚ India‚ naughty.nisarg@yahoo.co.in ‡ Sardar Patel Institute of Technology‚ Mumbai-400058‚ India‚ ekta vira@ymail.com Abstract Most of the smoke alarms available in the market use one or another kind of smoke sensor which increases the cost and also require complicated interfacing circuitry
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MICROCONTROLLER BASED ULTRASONIC DISTANCE MEASUREMENT ABSTRACT: The microcontroller based ultrasonic distance measuring device is a device used to calculate the distance between the ultrasonic transmitter/receiver and the object whose distance is to be measured. A microcontroller is used to calculate the delay time between the transmitted signal and the received signal. ULTRASONIC WAVES: Ultra means “beyond” and sonic means “sound”. Ultrasonic refers to sound waves
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A heat detector is a fire alarm device designed to respond when the convected thermal energy of a fire increases the temperature of a heat sensitive element. The thermal mass and conductivity of the element regulate the rate flow of heat into the element. All heat detectors have this thermal lag. Heat detectors have two main classifications of operation‚ "rate-of-rise" and "fixed temperature." |Contents | |
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BUILD AN EARTHQUAKE DETECTOR If you live in an earthquake zone‚ this vibration sensor can save your property or your life. If not‚ it can be used as a bur- or many of us that live in a seismically active region‚ an earthquake is a very real and constant threat. Even moderate earthquakes that are not strong enough to hurt anyone can cause a significant amount of damage to the contents of your house if you are not prepared. Although earthquake prediction has made great strides over the
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Smoke Detectors A smoke detector is a device that detects smoke and prevents fire. Smoke detectors were used in many houses in North America and it is important safety devices for homes. Smoke detectors are cheap and it gives alarm of any warning when it rise a high temperature that was produced by a fire this is because smoke detectors can detect the combustion gases from a small flame. In the article‚ a woman resident of the Silverpuff apartment were seriously injure of a fire because
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INFRA-RED FLAME DETECTION 123 S200+ SERIES TRIPLE IR FLAME DETECTORS USER MANUAL S200+ USER MANUAL INDEX PAGE A) INTRODUCTION 1 1. 1 Flame Detection Operation 1 3. B) Introduction 2. General Construction 4 PRODUCT APPLICATION 5 1. C) Application 5 2. Benefits of the S200+ Series 6 8 Introduction 8 2. Electrical Characteristics 8 3. Mechanical Characteristics 13 4. Environmental
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[pic] Intro Turn a calculator into a metal detector I recently discovered a really cool method in using a few household items to make a HomeMade Metal Detector! Heres how to make your own! Heres a link to the video : http://www.youtube.com/watch?v=_G5HzeIl9cY [pic] Step 1 What you need. All you need for this project is‚ an: AM Radio ‚ some tape ‚ and a small calculator. [pic] Step 2 Let’s Begin Begin by turning the AM radio on. Tune it to the high end
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By • It has been known for more than 30 years. • The first ultrasonic motor was introduce by v.v lavrinko in 1965. • An Ultrasonic motor is a type of electric motor formed from the ultrasonic vibration of a component‚ the stator being placed against another‚ the rotor depending on the scheme of operation. • Conversion of electric energy into motion by inverse piezoelectric effect. • To obtain the levels of torque speed characteristics of USM using conventional motors we require
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What are UltraSonic Waves? Ultrasonic waves are sound waves with frequencies high about human hearing and short wave lengths. Sound waves have frequencies about 20‚000 to 100‚000. Also Ultrasound frequencies range from 20 kHz (the upper range of hearing for a young adult human) through 150 kHz (audible to some bats and other creatures)‚ right up to 10 MHz (used in some medical treatments and industrial cleaning applications). While these frequencies overlap with those of radio waves‚ they are different
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nuclear power‚ and nuclear weapons helped the advancement of materials science‚ including titanium and aluminum‚ and the science of joining them. Ultrasonic welding was developed in 1960 by Aeroprojects Inc. Fine wire bonding was the first commercial use of ultrasonic welding. A disadvantage of ultrasonic welding is how many variables involved. Ultrasonic plastic welding was first used in 1963. Robert Soloff experimented with a probe and used it to weld two halves of a tape dispenser together.
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