Self Driving Vehicles: Good idea or a bad idea?

Reading Time: 6 minutes

Self Driving Vehicles: Good idea or a bad idea?

Laziness is the father of innovations”, beautifully quoted by Mr Stephen Shapiro, an American keynote speaker and businessman.

Consider an example of a human going for running some errands some miles away. “Walking would wear me out, so let me go on a bicycle. Well a bicycle is faster but efforts are still high, let me drop the idea of a bicycle. How about a two wheeler? No! It is hot out there and I hate dirt. Yes! I should use a car.” This type of laziness and comfort level is generally acceptable, but a lazy and luxury-oriented mind does not stop here. This is what it thinks, “Oh god! I am sleepy right now, how good it would be if someone would steer for me? Why to even sit in a car, I should learn teleportation. If only could I travel across the world with a blink of an eye?”

Well right now the first of the extreme desires of a human is starting to get fulfilled. An automatic car! Want to take a nap while driving? No problem. That is what a self driving car is all about. Okay, that is what a high amount of people think. The main aim of introducing autonomous car concept is not laziness or desires, but is to increase the safety measures of a car.

Safety is now the primary consideration for every vehicle manufacturer. As a customer, I would first have to predict if I could survive driving that car or not. “A little care and accidents become rare”, this is a famous road safety quote and a very essential one. According to survey, around 137,000 people died in India due to accidents in 2013 alone. This is more than the number of people killed in all our wars put together. According to Delhi Traffic Police reports, the major reason for accidents is a driver’s fault.

Self Driving Vehicles: Good idea or a bad idea?

A self driving car comes with sensors attached with the calls all around it. The sensors keep track of the objects around it, the distance of objects from the car, the speed with which they are approaching the vehicle etc and accordingly the vehicle decides the speed of car movement, the steering direction etc. This way the accidents can be prevented. This is what the computer aided vehicle (CAV) manufacturers claim.

Self Driving Vehicles: Good idea or a bad idea?

In India, the road traffic regulations are not much strict. People feel free to break some laws due to lower restrictions compared to other nations like USA, Canada, Germany and many more. These traffic jam costs the government around Rs 60000 crore a year due to fuel wastage, time delay etc. If everyone uses fully autonomous cars, there would be no traffic rules violations, no illegal road crossing, no traffic lights jump etc, so there will be smooth traffic flow and much time and money would be saved.

Productive use of driving time: “Time is money”. According to a Times of India survey, an average Indian spends about 18 days in a year behind the steering wheel. That is a lot of time wasted in driving. If one could use this time, much productivity could come out. Self driving cars could provide that too.

Self Driving Vehicles: Good idea or a bad idea?

Vehicle life and fuel efficiency: Human efficiency while driving is much less. Improper acceleration, deceleration, braking, gear shifts etc would wear out the car transmission parts. A computerized control would do a better task in these areas and hence a high vehicle life would result. This could also increase the fuel efficiency of the vehicle because of steady and identical aerodynamic effects on every car on the road.

Aid for elderly people and disables people: How many times have you wanted to go out in a car, but couldn’t due to lack of driving ability and no person to drive you there? There are no such problems if you have a self driving car. Self driving cars would facilitate the travel of elderly people and disabled people. With aging, reflexes and eyesight become weak. Self driving car would pose as a boon for them.

Self Driving Vehicles: Good idea or a bad idea?

Unemployment: But this is India; there are more people than it can feed. According to statistics, around 18 million people are unemployed in India. According to a case study, around 17 Million people are employed in road transport sector. If all the vehicles are replaced by driverless vehicles, unemployment would rise up to double of its current value. Not only drivers, but traffic police would be jobless. This poses a huge problem for India. “How can we allow such self driving vehicles when we already have a huge amount of unemployed people?” this statement was given by our current minister of road transport and highways, Mr Nitin Gadkari.

Fault in technology: Well, whatever the advantages discussed are based on an ideal driverless vehicle. But there is a potential for technology to go wrong. Driverless cars are based on programming and machine learning. Those codes are to be written by humans. There are possibilities of codes to have some bugs or glitches. Even if the vehicle performs well at first, it may happen that there are some bugs in the update the company provides. So there is a possibility of technology going wrong.

Privacy concerns are major these days. Threats for crimes and safety are increasing due to privacy leak these days. People can track you through GPS and follow you; they can have a track where you are and where you are headed to. And if a software drives your car, it becomes easier for the car to get hacked. Though the company would provide high security but software is always vulnerable to hack despite of all securities.

Self Driving Vehicles: Good idea or a bad idea?

Expensive: The most important aspect that would come in India’s way of self driving cars is cost. Software and hardware for self driving cars would cost a lot to the customer. The most sold car in India in July 2017 is Alto. It cost around Rs 2.8 lakh. This is what an average Indian wants to spend on cars. Most people want to have a car under Rs 8 lakh. Hence self driving car won’t have much market in its initial period.

Many more pros and cons can be listed in this subject, but the important ones that would affect the most are listed above. A self driving car has lots of pros and cons. To solve the unemployment problems, driverless technology can be used only as an aid to driver or an assistant to driver. But this won’t solve traffic problems. Hence if we try to eliminate one disadvantage, it would also eliminate one advantage too. So we cannot come to an absolute consensus with this topic of whether to have a driverless environment or to have the system as it is right now.

Differential – A hidden wonder of automobile

Reading Time: 3 minutes

While driving a car have you ever wondered how does the engine drive the wheels? How only one engine drives all the wheels of the car? How does the system manage to transmit the power to the wheels? Let’s have a brief look under the hood and understand a very important concept of an automobile, that is “DIFFERENTIAL”.

Engineering of an automobile is a very vast subject. On an average, about 30,000 parts are used for the manufacturing of a single car. Hence to study automobile, the whole subject is divided into 6 major systems: Chassis, Engine, Transmission, Steering, Braking, Suspension. Differential is a part of Transmission system.

Main aim of transmission, as the name suggests is to transmit the power produced by the engine to the wheels so that the vehicle moves. A transmission in general consists of an input shaft, an output shaft, gears and a differential. The input shaft gets power directly from the engine, which is manipulated according to our needs by gears and finally the output shaft carries the final power.

The differential then comes into action. The differential transmits the the power produced by the output shaft sideways. differential-1.gif (9034 bytes)

As shown in the picture, the differential is situated between the two wheels and it transfers the motion of transmission shaft/output shaft to the rotary motion of the wheels. The transmission shaft rotates the driving pinion, which in turn drives the ring gear (crown wheel). This ring gear is attached to a small sun gear/side gear. This side gear is meshed via the differential pinion gear(planet gear). Both the side gears are connected to the half shafts(axle) connected to the wheels.

Why to use the side gears pinion assembly when we can directly connect the ring gear? Also this work seems to be easy. But this is not all a differential does. A differential is designed for a far more greater purpose.

Whenever an automobile turns, there is a difference in the speeds of the inner and the outer wheels.

Image result for differential automobile

As you can see, the outer wheel of the automobile has to travel a larger distance than the inner wheel in the same amount of time while turning. Hence the speed of outer wheel is more. This can be achieved by unequal and proportionate distribution of power to the wheels. The outer wheel needs more power than the inner wheel and this unequal but proportionate distribution of power is done by the differential.

Differential - A hidden wonder of automobile

The inner half shaft in the figure indicated the part of the shaft connected to the inner wheel while the outer half shaft to the outer wheel. Both the shaft move in anticlockwise direction when moving on a straight road. Hence the power is distributed equally and both the side gears hence the shaft rotate at same speed.

While turning, both shafts do rotate in the same direction. The outer wheel has to move at higher speed than the inner wheel. This produces a couple moment at the differential pinion. This force drives the pinion gear to rotate. Due to this rotation, the side gear of the outer shaft rotates at a rate higher than the inner wheel. The side gear of outer shaft gets an additive rpm while the inner shaft gets a subtractive rpm. Hence due to this production of different speeds in both the wheels, the system is called a differential.

Hence for different turns, different torque is applied on the differential pinion and according powers are provided to the wheels. This was the basic information about differential and transmission. Further the differentials are classified into different types differentials like open differential, locking differential, limited slip differential, electronically controlled limited slip differential, torque vectoring differential etc. But for basic understanding of the differential, this much knowledge is enough.

Visit at Volkswagen Plant, Pune

Reading Time: 4 minutes

Download pdf

“Why only Volkswagen can build a Volkswagen?”

This is cool line, but you know what’s cooler? The fact that it’s true.

                What you can do just after the exams? Just follow CEV group activities and you will definitely find some great attraction towards CEV group and its activities. We thought to visit something really cool or by which we can enrich our Technical knowledge as well as can have fun with Techies.

We started our journey to visit Volkswagen Pune plant from SVNIT-Surat on the morning of Dec  7th,2014 for Mumbai. After reaching at BCT-Mumbai at 04:00pm, we visited some of the well-known places in Mumbai viz. Gate way of India, Hotel Taj, Churni road-Chopati till 09:00 pm. By the late night of Dec 7th, we reached at Pune and stayed at Hotel. As we were supposed to reach at company plant by 09:30am on Dec 8th, we fresh up early and went there by Tempo Traveller that we have hired. We started our best part of the journey at 10:00am, after the introductory session that has taken by Chaitanya Halbe sir. Here is the journey into one of the biggest and most respected carmakers. A great deal of Thought , Attention and Innovation goes into the every stage-process to built each car that is truly Das Auto ( The Car ).

As we all know, Cars can be divided into two groups according to their designs.

  1. Hatch back
  2. Siddan

Volkswagen worldwide

Volkswagen Automobile Group is globally represented by twelve brands- Volkswagen, Passenger Cars, Audi, SEAT, SKODA, Bentley, Bugatti, Lamborghini, Porsche, Ducati, Volkswagen Commercial Vehicles, Scania and MAN. The product spectrum ranges from motorcycles to luxury vehicles and heavy trucks.

Total production plants- 106 across 27 countries.

Total employees- 572,800 (including indirect employees)

About Pune Plant

The Volkswagen India plant, situated in the industrial hub of Pune i.e. Chakan -37 km away from Pune city, is one of the most modern facilities in the Volkswagen Group worldwide and has a high level of vertical integration. An initial investment commitment of Volkswagen group is INR 3,800 crores (580 million Euros) and is planning to invest INR 5000 crores more in upcoming years.

The state-of-the-art Pune Plant builds Volkswagen Polo and Vento and SKODA Rapid on a single line at the same time.

Employees- 3,600 (including 1,100 indirect employees and 33 R&D researchers)

Total Area- 575 acres (including 100 acres constructed area)

Investment till date- 700 million Euros

Production of cars per day- 430 cars in 2 shifts

Production Capacity- 130,000 cars in 2 shifts

Cars Produced

  1. Volkswagen Polo since Dec 2009 (Right Hand Drive as well as Left Hand Drive)
  2. Volkswagen Vento since Aug 2010 (Right Hand Drive as well as Left Hand Drive)
  3. SKODA Rapid since Oct 2011 (Right Hand Drive Only)
  4. SKODA Fabia till Dec 2013 only

The manufacturing facility includes Body Shop followed by

Paint Shop and then

Assembly line

  1. Body Shop – Initial stage where car starts taking shape.

Pressed metal (100% Galvanised steel for 100% strength & safety) parts from the Press Shop are received in the Body Shop to create the body shell.

The car bodies are built from bottom to top; starting from the underbody, then the side framers, roof and finally with closure parts viz. doors, bonnet and boot lid with almost 35% of automation.

  1. Paint Shop – Stage in which car is giving its colours

Firstly, the vehicle body undergoes a cleaning process after which it gets the ElectroCoat followed by Coarse Sealent, Underbody Coating and Fine Sealing before getting the Primer Coat.

Finally, finishing and waxing of the body is done and then car body is sent to the assembly line.

Local manufacturers – Asian Paints. (To decrease the manufacturing cost)

  1. Assembly line – Final area of manufacturing

Here, you’ll get a chance to experience German Engineering, made in India. Also, witness one of the fastest marriages of Chassis with remaining car body. The car then moves to the finish line where it gets the steering wheel, airbags, seats and doors.

Local manufacturers – MRF and Apollo for tyres.

Why should you buy Volkswagen cars?

  1. Unique Roof Laser Welding for greater rigidity and zero dampness. (Roof stay stronger and more secure even after years.)
  2. 6 years of anti-perfurism warranty
  3. Inline Measurement process done by Robots for zero-error body that lasts years.
  4. 11-stage Paint Process for longer-lasting beauty and Ro-Dip Technology for 360* paint coverage for excellent corrosion protection.

 Extra tests carried out on Volkswagen cars

  1. Stone Impact Test to check paint and body strength.
  2. Destruction Tests to ensure ultimate endurance & quality.
  3. Intense checks for almost 7 hours on each car.
  4. Test on special track.

Exports from Pune Plant

‘German Engineering, Made in India by Volkswagen’ is in great demand worldwide. Currently, Volkswagen India exports the Polo and Vento, in right-hand as well as left-hand drive versions, to over 32 countries across three continents – Asia, Africa and North America.

Commencement of export – 2011 in South Africa

2012 in Middle East countries with LHD

2013 in Mexican Market with Indian Vento

2013 in Malaysia with component of Polo and Vento

CEVians really enjoyed the manufacturing process of POLO and its elder brother Vento and the iconic distinct cousin Beetle.

Rich Resources of SVNIT Surat

Reading Time: 2 minutes

 

1.       Facility to download IEEE Research Papers for no cost through SVNIT  Local Area Network

IEEE is The World’s largest professional association for the advancement of technology. For us, it is a very good platform to read about all Research Papers written for all branches of Electrical & Electronics Engineers. But you need to be a member of that particular IEEE society to be able to download and read the paper. But!!! Our college provided us access to IEEE papers from our campus. So if you connect to IEEE website from our college LAN then you can access and download the papers!!!

So wait for what?? Read the latest research papers on various IEEE Societies mentioned onhttp://www.ieee.org/membership_services/membership/societies/index.html

Link to IEEE Explore for seeing a Research Paper of your interest- http://ieeexplore.ieee.org/Xplore/home.jsp

 

2.       Magazine and Journal Section in Central Library

Entering Central Library and on the second floor there is a Section for Magazines and journals for all branches which are the best way to stay in touch with the latest in technology. So go any explore your technical interest…..

 

3.       Reference Section 2nd Floor Central Library

We have a whole section of the best reference books for 100s different topics of all branches in our Reference Section. Avail that facility to read them and get your fundamentals crystal clear

 

4.       Digital Library – Store house of all well know Tech Journals ….

Go to svnit.ac.in -> Central Facility -> Central Library -> On Right Section Digital Library LINK

You need to login through our college LAN and then you can access various cool stuff like

E-BooksSpringler E-books, Cambridge University Press E-Book …….

E-JournalsScience DirectACM Digital Library, Institute of Civil Engineering Journals, Engineering Science Data Unit Series etc..

Purchased/Subscribed Standards

Previous Year Question Papers

Internship

Reading Time: 4 minutes

 

Quoting what IIT Delhi Global Internship Program FAQ;s Have to say:

https://sites.google.com/site/aicetinterns/

 

  I am a student of the <>th semester, can I apply ?

Every student is (wrongly) advised by seniors to go for a internship at the earliest opportunity. Senior students often tell junior students (wrongly) that grades don’t count, and that projects are all that matter. They are wrong. Grades count – we look at your grades very carefully when we select you for the Internship.

The best time to go for a Internship is in the summer following Semester 6 + Semester 7 (nearly 9 months), or the whole of Semester 7 + winter + Semester 8 (almost a year). Without doing your discipline courses in Semesters 6 and 7, you could be very badly prepared for any internship.

Please try to follow the advice below when you choose your Internship period:

 If you are a student of Semester …. : Advice 
 Semester 1,2,3
  1. Please do not come for this internship or ANY internship for that matter in Semester 1-3.
  2. Take your textbooks for the next semester and study the chapters.
  3. Try to solve the questions and read alternative textbooks in the area.
  4. Also, do NOT join C# / .ASP / .NET coaching classes – such courses only reduce your study time. An employer will probably hire a programmer for these skills and not a software engineer. 

    Confused ? The difference between a software engineer and a programmer is like the difference between a doctor and a compounder. Both can administer a injection, perhaps even equally well – but only the doctor would knowwhy the injection was necessary. Even if the compounder, due to long practice, gets to administer the injecton more deftly than the doctor, the doctor will still be the only of the two who knows why. The compounder would always know just how to administer the injection.

    If programming also interests you, buy a good book on the language you want to program in, download linux (www.ubuntu.com) and learn it for free at home.

 Semester 4
  1. Please avoid coming for a Internship in Semester 4 unless there is something special you think you need to do. Special things could be going to Institute X because there is a Scientist X there who specialises in Algorithm Y, taking a course in a area not taught in your Institute next semester.
 Semester 5, 6
  1. Prepare for your Internship by doing all of the following:
    1. Read the latest journals in areas of interest every Friday – either in the library or on the net (see www.webproforum.com)
    2. Read alternative text books
    3. Read IEEE / IEE Journals for recent papers – don’t bother if you don’t understand everything at first (30% understood is good enough). Keep reading.
    4. Form Special Interest Groups (SIGs), meet on a weekly basis and discuss topics
    5. Give (voluntarily) a Weekly Seminar on what you read – you could give this to your Special Interest Group
    6. Talk to your own Faculty / lab technicians for possible projects you could do – whether in lab-oriented or theoretical projects.
    7. Start identifying faculty in your institute or outside your Institute in the areas of interest. Write to them.
      Do NOT write emails indiscriminately to hundreds of people – it will backfire on you when you are found out.
    8. Attend conferences, talks and lectures in your city.
    9. Watch Discovery, CNN, National Geographic and Eklavya.
    10. Join a local library. Visit the local University library. Read fiction and non-fiction. Take Art classes. Take pottery classes. Learn to play a musical instrument.
    11. Watch lectures of the courses you are being taught on YouTube.
    12. Read the course material of the courses being taught to you on MIT’s Open courseware site or IIT’s NPTEL site.
    13. Apply for Internship in time
 Semester 7,8
  1. Try to do projects within your Institute. Accomodation is not a problem. People know you and your background and the chance of being handed a task you cannot execute is minimal.

    On the other hand, a Faculty Member in another Institute is very likely to assume that you have done something in your coursework which you have not done.  You avoid all the following when you do your project in your own Institute ! It is no joke – it cuts into work time and influences work moods significantly.Only when it is absolutely unavoidable, go outside your Institute to do a Internship. And if you do go to another Institute, give first priority to availability of accomodation on campus even if it is marginally more expensive. This saves time and you get to meet more people in your peer group, have longer working hours and tend to achieve much more in your Internship.

    1. Coming to a strange city or a strange country
    2. getting accomodation, or even having to adjust yourself into a relative’s home for six long months
    3. having constantly worried parents
    4. dealing with indifferent food
    5. going through long commutes
    6. suffering irregular mealtimes

 

Things I would like to add:

2 most inspiring and knowledgeable novel that will change your thinking:

Fountainhead By Ayn Rand

 Outliers – Malcolm Gladwell

For ones who are not not good at programming read “The C Programming Language (Ansi C Version) 2nd Edition” written by creator of C – Dennis Rotchie. It costs only Rs 146!!! Link

For 1st yearites the best option to get their 1st year concepts right by watching videos @ NPTEL’s & MIT 1st year course for EC & Comps students Link1 Link2

Videos of Basic 1st and 2nd sem subjects. Just watch them at 1.5x speed as you may feel them to be bit slow!!!

 Few good place to look for Internships online: www.internshala.com, www.twenty19.com

+ List of Online Portal to see video lectures, projects, departmental magazines, some god father tech sites is provided in “Extra Edgy Things For All Engineers” Blog

CRYOGENICS : Basics & Applications

Reading Time: 7 minutes

 

 

 

TABLE OF CONTENT

  • INTRODUCTION
  • CRYO—-
  • TYPES OF CRYOGENIC TREATMENTS
  • ABSOLUTE ZERO
  • PRODUCTION OF LOW TEMP
  • METHODS OF LIQUIFICATION OF AIR
  • APPLICATIONS
  • CRYOGENS
  • CONCLUSION
  • CRYOGENIC LABORATORY

 

INTRODUCTION

  • Cryogenics – the study and use of materials at extremely low temperatures
  • Inputs from three major disciplines, namely PHYSICS , MECHANICAL ENGINEERING, CHEMICAL ENGINEERING
  •  Such low temperatures cause changes in the physical   properties of materials that allow them to be used in unusual engineering, industrial, and medical applications
  •  For example, in the cryogenic temperature range, air becomes a liquid—or even a solid—and living tissue freezes instantly

 

TYPES OF CRYOGENIC TREATMENT

  •  SHALLOW CRYOGENICS, the objects are cooled down to temperature of approximately -85oC
  • FLOODING, first the object is taken to -85oC, then the chamber is flooded with liquid nitrogen to reduce the temperature furthur
  • DEEP CRYOGENICS TREATMENT, Subjects the objects to the temperature of approximately    -185oC

 

ABSOLUTE ZERO

  • Absolute zero is a temperature marked by a 0 entropy configuration. It is the coldest temperature theoretically possible and cannot be reached by artificial or natural means

 

PRODUCTION OF LOW TEMPERATURE

  • HEAT CONDUCTION: When bodies are in contact, heat flows from the body with the higher temperature to the body with a lower temperature. Can occur between any and all forms of matter. It is essential in the production of cryogenic temperatures and environments.
  • EVAPORATIVE COOLING: Humans lose heat by this mechanism. Atoms and molecules in the gaseous state are moving faster than the atoms and molecules in the liquid state. Adding heat energy to the particles in a liquid makes them gaseous
  • THE JOULE-THOMSON EFFECT:  Allowing a gas to expand very rapidly causes its temperature to drop dramatically. Reducing the pressure on a gas accomplishes the same effect.
  • Ordinary house hold refrigerators and air conditioners operate on this principle.

 

METHODS OF LIQUIFICATION OF AIR

  • Linde’s System also known as Hampson System
  • Claude’s System

LINDE’S SYSTEM

 

 

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  • Clean dry air is taken from the atmosphere and is compressed up to 200 bar
  • The high pressure enters into counter flow air to air heat exchanger and is then throttled to atm – pressure
  • The J-T cooling up to expansion causes a lowering of temperature and this cool air is passed through heat exchanger where it cools the incoming high section
  • Thus the temperature at the valve is progressively lowered until the liquefaction temperature is reached

 

CLAUDE’S SYSTEM DIAGRAM

 

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  • Claude’s System yields more efficient cycle than Linde’s System
  • The expansion through an expansion valve is an irreversible process.
  • In Claude’s System energy is removed from the gas stream by using an expansion engine or expander.
  • The expansion process is isentropic and much lower temp is attained then isenthalpic expansion
  • In Claude’s System the gas is first compressed to pressure of the order 4 Mpa.

 

How Claude’s System is more efficient than Linde’s System

  • The advantage of the Claude’s System is, it operates at low compression ratio      compared with Linde’s process.
  • Secondly the temperature of air before coming to the expansion valve in Claude system is lower than the Linde system.

 

Cryogenic Devices

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APPLICATION OF CRYOGENICS

  •   Aerospace-cryogenic engines
  •  Medical Field
  •  Manufacturing field
  •  Electronics Field
  •  Fuels research
  •  Miscellaneous uses

 

CRYOGENIC ENGINES IN AEROSPACE

  • First operational Cryogenic Rocket Engine is 1961 NASA designed  RL-10 LOX LH2 rocket engine
  • The second-stage Pratt & Whitney RL10B-2 engine is based on the 30-year heritage of the reliable RL10 engine
  • At Mahendragiri in Tamil Nadu, is the LPSC. The system involves materials working at 23K and pumps at speeds of 40,000 rpm. Complex metering, monitoring, integrating technologies involved. The engines required to fire for  700 seconds during the final stage of a launch providing 7 tones of thrust
  • Engine works on ‘Staged Combustion Cycle’ with an integrated turbo pump running at 42,000rpm. Also equipped with two steering engines developing a thrust of 2 kN each to enable three-axis control of the launch vehicle during the mission
  • Closed loop control of both thrust and mixture ratio, which ensures optimum propellant utilization for the mission
  • To know how cyrogenics plays vital role in space shuttle.. watch this video :

              https://www.youtube.com/watch?v=LjG-4oR7JxI

 

CRYOSURGERY

  • Cryosurgery- Use of extreme cold produced by liquid nitrogen (or argon gas) to destroy abnormal tissue.
  • Used to treat external tumors, such as those on the skin.
  • For internal tumors, liquid nitrogen is circulated through a hollow instrument called a Cryoprobe.
  • Used since many years in the treatment of skin cancer

 

CRYOGENICS IN MANUFACTURING FIELD

  • Cryogenic treatment works on Reamers, Tool bits, Tool punches, Carbide Drills, Carbide Cutters, Milling Cutters, Files, Knives, Reciprocating Blades, Dies and cutting tools
  • Stress relieved ferrous and non ferrous castings and forgings for enhanced dimensional stability and surface finish

 

CRYOGENICS IN ELECTRONICS FIELD

  • Super conducting electronic devices like SQUID (Super conducting quantum interference device) are used in sensitive digital magnetometers and voltmeters
  • Zero friction bearings use magnetic field instead of oil or air, derived from the Meissner Effect associated with super conductivity.
  • Super conducting electric motors are constructed approaching zero electric loses

Nuclear Magnetic Resonance Spectroscopy (NMR)

Most common method to determine the physical and chemical properties of atoms by detecting the radio frequency absorbed and subsequent relaxation of nuclei in a magnetic field. Strong magnetic fields are generated by supercooling electromagnets. Liquid helium(BP  4K) is used to cool the inner coils. Cheap metallic superconductors can be used for the coil wiring. So-called high-temperature superconducting compounds can be made to superconduct with the use of liquid nitrogen(BP 77K)

Magnetic Resonance Imaging (MRI)  :

Complex application of NMR where geometry of the resonances is deconvoluted and used to image objects by detecting the relaxation of protons that have been perturbed by a radio-frequency pulse in the strong magnetic field. Mostly used in health applications

Electric Power Transmission:

  • Superconductors could be used to increase power throughput. Require cryogenic liquids such as nitrogen or helium to cool special alloy-containing cables to increase power transmission. Field is the subject of an agreement within the International Energy Agency.

Frozen Food:

  • Transportation of large masses of frozen food. Food is freezed in war zones, earthquake hit regions, etc. Cryogenic food freezing is also helpful for large scale food processing industries

Forward looking infrared (FLIR)
Many infra-red cameras require their detectors to be cryogenically cooled

 

Blood banking
Certain rare blood groups are stored at low temperatures, such as −165 °C

Special effects
Liquid nitrogen and CO2 has been built into nightclub effect systems by Kryogenifex to create a chilling effect and white fog that can be illuminated with colored lights.

 

 

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  • Inert Gases: Do not react chemically to any great extent. Do not burn or support combustion. Includes Nitrogen, Helium, Neon, Argon and Krypton
  • Flammable Gases: Some cryogenic liquids produce a gas that can burn in air. Includes Hydrogen, Methane and Liquefied Natural Gas
  • Oxygen: Many non-combustible materials can burn in the presence of Liquid Oxygen. Organic materials react explosively with Liquid Oxygen. Hazards and handling precautions of liquid oxygen is considered separately from other cryogenic liquids

 

FACILITIES AT OUR CRYOGENICS LABORATORY

  • Oil Diffusion Vacuum Pumping System with Measuring Guages, Trolley Heater & Oil
  • Dewar vessels ( Model T-26-A 0110 capacity – 25 Lt. ) ( Model T-55-A 0110 capacity – 50 Lt. )
  • VPF 100 Liquid Nitrogen variable temperature Dewar with Controller & Trolley
  • Servotronic Digital (6 digit) Temperature Indicator ( PT-100 -200C to 100C six channel 230 VAC )
  • Piezo-Electric Transducer with Accessories
  • Data Logger with Software for online display ( ModelNo: MICROLOG 6102 + CST 27)
  • Helium Compressor

 

Projects on Cryogenics

  • QUASI-ISOTHERMAL EXPANSION ENGINE FOR CRYOGENIC AUTOMOTIVE PROPULSION
  • CRYOGENIC ENGINE IN ROCKET PROPULSION
  • DEEP SPACE COOLING TO ELIMINATE CRYOGENIC VENTING
  • APPLICATION OF CRYOTREATMENT FOR ENHANCEMENT IN TOOL LIFE

Teardown of Washing Machine

Reading Time: 3 minutes

TEARDOWN OF WASHING MACHINE

 

MAJOR COMPONENTS

  • Motor & counterweight
  • Cable –pulley support system
  • Vibration damping system
  • Plumbing system
  • Clutch & coupling
  • Drive mechanism
  • Control system

 

 

Motor & Counterweight

  • The concrete is used to balance the equally heavy electric motor, which drives a very heavy gearbox that is attached to the steel inner tub.

 

 

 

 

Cable –pulley support system

  • There are a total of three pulleys, so that if one side of the frame moves up, the other side moves down. This system supports the weight of the heavy components, letting them move in such a way as not to shake the entire machine.

 

 

 

Vibration damping system

  • In each of the four corners of the machine is a mechanism that works a little like a disc brake. The part attached to the washer frame is a spring. It squeezes two pads against the metal plate that is attached to the black frame.

 

 

 

Plumbing system
It comprises of the following parts:

  • Solenoid valve
  • Anti-siphon device
  • Water inlet & overflow port
  • Pump vanes

 

 

 

 

 

Clutch & Coupling

  • The coupling is needed because the motor and clutch are mounted to the frame, which can move freely with the inner tub, whereas the pump is mounted to the stationary outer tub.

 

 

 

 

Drive mechanism

  • The drive mechanism on a washing machine has two jobs:

To agitate the clothes, moving them back and forth inside the wash tub.

To spin the entire wash tub, forcing the water out.

 

 

 

 

Control & Coordination

 

  • Water level control switch
  • Temperature control switch
  • Speed control switch
  • Cycle switch

 

 

Front Loading Machines

 

  • This layout mounts the inner basket and outer tub horizontally, and loading is through a door at the front of the machine.
  • Front-loaders control water usage through the surface tension of water, and the capillary wicking action this creates in the fabric weave.
  • Front-loading washers are mechanically simple compared to top-loaders, with the main motor (usually a universal motor) normally being connected to the drum via a grooved pulley belt and large pulley wheel, without the need for a gearbox, clutch or crank.

 

 

Advantages

 

  • Clothing can be packed more tightly in a front loader, up to the full drum volume if using a cottons wash cycle.
  • Front-loading washers are mechanically simple compared to top-loaders.

 

 

Limitations

 

  • Extreme overloading of front-loading washers pushes fabrics towards the small gap between the loading door and the front of the wash basket, potentially resulting in fabrics lost between the basket and outer tub, and in severe cases, tearing of clothing and jamming the motion of the basket.

 

 

Top Loading

  • This design places the clothes in a vertically mounted perforated basket that is contained within a water-retaining tub, with a finned water-pumping agitator in the center of the bottom.
  • In most top-loading washers, if the motor spins in one direction, the gearbox drives the agitator; if the motor spins the other way, the gearbox locks the agitator and spins the basket and agitator together. Similarly if the pump motor rotates one way it recirculates the sudsy water; in the other direction it pumps water from the machine during the spin cycle of the basket.

 

 

Advantages

 

  • The top-loader’s spin cycle between washing and rinsing allows an extremely simple fabric softener dispenser, which operates passively through centrifugal force and gravity.
  •  Another advantage to the top loading design is the reliance on gravity to contain the water, rather than potentially trouble-prone or short-lived front door seals.
  • Top loaders may require less periodic maintenance since there is no need to clean a door seal or bellows, although a plastic tub may still require a periodic “maintenance wash” cycle.

 

 

Limitations

 

  • Clothing should not be packed tightly into a top-loading washer. Although wet cloth usually fits into a smaller space than dry cloth, a dense wad of cloth can restrict water circulation, resulting in poor soap distribution and incomplete rinsing.
  • Extremely overloaded top-loading washers can either jam the motion of the agitator, overloading or damaging the motor or gearbox, or tearing fabrics.

 

 

Extra Edgy Things For All Engineers

Reading Time: 3 minutes
World Class Education Websites :- 

1.) edX.org

2.) coursera.org

3.) NPTEL.ac.in (watch at 1.5 x speed )

 

Internship and Workshop : Companies

 

1.) I3 Indiya

2.) Wegilant( Speacilized in Cyber Security)

3.) Robosapiens

4.) Technophilia

5.) Thinkware (Good for Matlab)

6.) Thinklabs

7.) Waayoo

8.) Learnics.in

9.) Logicbrigade.com

10.) STP.mbsgroup.in-(Also Has Course on F1 Car Design and Development)

 

To-Do Projects :-

 

Electronics Engineering

1.) SMPS

2.) POV

3.) LED CUBE

4.) FM Receiver

5.) Line Follower

6.) Temperature Controlled Fan

7.) Phone Jammer

8.) 555 Timer Projects

9.) Raspberry Pi

 

Mechanical Engineering

1.) Robotic Arm

2.) RC Plane

3.) Hovercraft

4.) Wall Climbing Robot

5.) Rope Climbing Robot

6.) Pole Climbing Robot

7.)Tricopter/Quadcopter

8.) Hydraulic Lift Arm

 

Chemical

1.) Batteries: Batteries of Your Own, like

  • Galvanic Cell
  • Zinc Air Battery
  • Al Air Battery
  • Al CU Battery

2.) Propulsion System: Car using

  • Vinegar+ Baking Soda
  • Decomposition of H2O2

3.) Search On MFC-Microbial Fuel Cell

4.) Research Alternate Source of Energy like Jatropha Seeds

 

 

 

 (continue on right column…..)

Electrical Engineering

1.) Power Generation from Moving Vehicles

2.) Power Theft Protection

3.) Booster Circuit

4.) Inverter Circuit

 

Civil Engineering

1.) Cardboard Model Building

2.) Designing On Softwares

3) Some Famous Civil Engineering Projects – Bridges, Tunnels and Dams

 

Computer Engineering

1.)Read: A Complete Reference to Java by Herbert Schildt

2.) Make Applets

3.) Android App Development

4.) Game Development

5.) AI-Artificial Intelligence: – Course on edX

6.) Read HTML: – HTML-5 for Web Development

7.) PHP

8.) Hacking

9.) Android- Learn to Root, Flash

10.) Google about Crack Paid Software using Decompiler and Disassembler!!!

11) Read  “C Programming Language” written by the creator of C – Dennis Ritchie

 

 

Extra-Edge Software

 

Civil

1.) Revit

2.) AutoCad

 

Computer Engineering

1.) Android App Development-IDE:-Eclipse

2.) Game Development Softwares

3.) Hacking-Backtrack OS

 

Chemical Engineering

1.) Aspen

2.) Super Pro Designer

3.) Open Foam

4.) Chemsketch

 

Mechanical Engineering

1.) Autodesk- AutoCad

2.)  Inventor

3.) Pro-e

4.) Google Sketch-Up

 

Electrical Engineering

1.) E-tap

2.) Matlab

3.) LabView

4.) PSCAD

5.) Simulink

6.) Lapack-Numerical Linear Algebra

 

Electronics

1.) MultiSim

2.) Proteus: Ckt and AVR MCU Simulation

3.) Eagle: PCB Designing

4.) Matlab: Mother of all things-

       Image Processing,Computer Vision,Control System Simulation, Digital Signal Processing

5.) NI’s LabView

 

Magazines

1.) ECE  – EFY

2.) Mech- Top Gear, Overdrive, AutoCar

3.) Chem- Chemical Engineering, World,Chemical Industry Digest

4.) Comps- Digit, Chip

5.) Electrical- Industrial Automation (IED Communications),IET(generation transmission and distribution)

 

Tech Fests

Even Semester

1.) IIT Bombay -Techfest Jan first week

2.) IIT Madras -Shaastra   Jan first week

3.) IIT Kharagpur -Kshitij Feb first week

4.) NIT Trichi-Pragyan-Feb End

5.) IIT Kanpur -TechKriti   March Mid

6.)BITS Pilani -Apogee   March Mid

7.) IIIT Hyderabad -Felicity

8.) IIT Roorkee -Cognizance

 

Odd Sem

1.) NIT Surathkal-Engineer – October End

2.) NIT Warangal-Technozion-   September End

 

God Father Sites

 

1.) http://www.howstuffworks.com/(Discovery’s Site-More of general Science)

2.) http://www.engineersgarage.com/

3.) http://www.extremeelectronics.com

4.) http://www.circuitstoday.com/

5.) www.societyofrobots.com (The best according to me)

6.) http://www.electronics-tutorials.ws/

7.) http://www.ece101.com/

8.) http://narobo.com/

9.) http://www.pyroelectro.com/

10.) http://students.iitk.ac.in/roboclub/tutorials.php

 

Electrical Engineering

1.) controleng.com

2.) control.com

3.) electric.net

4.) controlglobal.com

 

Mechanical Engineering

1.) pirate4x4.com

2.) carbibles.com

3.) SudhaCars.com

 

 (Continue on right column ……)

Computer Engineering

1.) code.org

2.) codechef.com

3.) spoj.com

4.) Java Applets-http://walter-fendt.de/ph14e/

 

Others

1.) internshala.com

2.) knowafest.com

3.) twenty19.com

 

 

Sites to buy robotics stuff

In India:

1.) http://nex-robotics.com/

2.) http://www.robokits.co.in/

3.) http://www.vegarobokit.com/

4.) http://www.rcbazaar.com/default.aspx

5.) http://www.rcdhamaka.com/

 

World best online robotics store:

1.) Jameco

2.) Solarbotics

3.) Digi-key

4.) Radioshack.com

 

Movies

1.) Gravity

2.) October Sky

3.) Iron Man-1, 2, 3

4.) Wall-E

5.) Batman

6.) G I Joe-1, 2

7.) Transformers-1, 2, 3

8.) The Social Network

9.) Avatar

10.) Real Steel

11.) Pirates of Silicon Valley

12.) Blade Runner

13.) 2002: A Space Odyssey

TELEVISION SHOWS

 

Discovery, Discovery Science, Discovery Turbo

1.) How Tech Works

2.) Dark matters

3.) Extreme Engineering

4.) Deconstructed

 

History TV

1.) Modern Marvels

 

NatGeo TV

1.) Big, Bigger, Biggest

2.) MegaStructures

3.) MegaFactories

4.) I Didn’t Know That

5.) Ultimate Factories

6.) Mega Factories

 

 

CEV - Handout