Ce diaporama a bien été signalé.
Nous utilisons votre profil LinkedIn et vos données d’activité pour vous proposer des publicités personnalisées et pertinentes. Vous pouvez changer vos préférences de publicités à tout moment.

Sound wave fire extinguisher

2 341 vues

Publié le

A short preview on sound wave fire extinguisher

Publié dans : Ingénierie
  • Identifiez-vous pour voir les commentaires

Sound wave fire extinguisher

  1. 1.  Disaster Management Technology;  Wave Extinguisher;  Structure of Wave Extinguisher;  Working procedure of Wave Extinguisher;  Uses of Wave Extinguisher;  Aspects of Wave Extinguisher;  Wave Extinguisher in the Perspective of Bangladesh & its scope in Bangladesh. 2
  2. 2. In the mid-80s, by Dr. Frank Press, a lead scientist, devoted to reduce significantly the consequences of natural hazards. 3 The application of science and technology can substantially reduce losses of lives and property, as is illustrated by several studies. Over the last three decades, scientific knowledge of the intensity and distribution in time and space of natural hazards and the technological means of confronting them have expanded greatly.
  3. 3. 4  Two engineering students at George Mason University harnessed sound to put out fires Their chemical-free, water-free extinguisher uses sound waves to separate burning fuel from oxygen. Fire dies out without oxygen, so using the sound wave extinguisher on a small fire snuffs it out.  Researchers previously patented this idea but this is the first sound wave extinguisher to work reliably . Not only does it work, but the final prototype is handheld (though, admittedly large) and only cost $600 to build. Viet Tran, a computer engineering major and Seth Robertson, an electrical engineering major invent this unique technology for preventing fire hazard in 2012 4 What is a Sound Wave Fire Extinguisher?
  4. 4. What is a Sound Wave Fire Extinguisher? Figure: Wave Extinguisher 5
  5. 5. The principle behind the extinguisher is simple as they are mechanical pressure waves that cause vibrations in the medium in which they travel, sound waves have the potential to manipulate both burning material and the oxygen that surrounds it. Tran and Robertson explored the impact of different frequencies of sound on small fires. Bass frequencies between 30 and 60 Hz produced the desired extinguishing effect. Consisting of an amplifier and cardboard collimator to focus the sound, the duo's final extinguisher prototype – which cost them only about $600 to develop – is a hand-held, 9 kg, mains- powered device with the capacity to quickly put out small, alcohol-fuelled fires. 6 Principles, Characteristics of Wave Extinguisher
  6. 6. 7 Working Procedure of Sound Wave Fire Extinguisher 7 Frequency Generator (phone or function generator) Audio Amplifier Subwoofer (frequency output) Collimator Vortex Nozzle Micro Controller IR Sensor Power Supply Unit(PSU) Battery Power Source System Design Breakdown
  7. 7. Frequency Generator: Selects frequency into the amplifier. Audio Amplifier: Amplifies the audio signal from 5V to 19V. Power Supply Unit: Powers audio amplifier(high current). Acoustic Output: Emits acoustic signal. Collimator/ Vortex: Focuses acoustic output to form vortex. IR Sensor: Uses of wavelength of fire to detect a flame. Working Procedure of Sound Wave Fire Extinguisher 8 Wave Extinguisher
  8. 8. Working Procedure of Sound Wave Fire Extinguisher 9
  9. 9. Uses of Wave Extinguisher Extinguish a chemical fire of 12” diameter Detect a flame or fire Potentially serve as an alternative to traditional fire extinguishers swarm robotics where the device would be attached to a drone to be used in situations such as large forest fires or urban blazes Used for manipulating both oxygen and burning material One possible use could be in space, where traditional extinguishing agents are hard to focus at a target fire Quickly put out small, alcohol- fuelled fires. 10 Uses of Wave Extinguisher
  10. 10. Having acquired a preliminary patent application for the design, the researchers are now hoping to move onto further testing and refinements of their extinguisher, with the aim of taking steps towards a potential commercial application. A possible complication may lie in the heat inherent in larger blazes. As the sonic extinguisher contains no coolant, it may be unable to prevent larger fires from reigniting after the sound is turned off. Aspects of Wave Extinguisher 11
  11. 11. Wave Extinguisher in the Perspective of Bangladesh & its scope in Bangladesh Though Wave Extinguisher was first invented in 2012, There is rarely any use of wave extinguisher to tackle fire hazard in Bangladesh. 12 Wave extinguisher would be one of the best extinguisher for Bangladesh because of: Rather than asphyxiating agent, wave extinguisher is less costly and needs less manpower; The technology and system design is simple . Cost is low and handing is very much simple. Waterless extinguishers for stopping forest fires during droughts. Which is very much important for agricultural country like Bangladesh especially in the northern side.
  12. 12. Instead of limitations, shortcomings; there are huge possibilities and scopes of Wave Extinguisher in the perspective of Bangladesh as well as in the whole world. 13