How does Metal Detector work?

Now a day, there is now one how has not seen a Metal detector, there are present in every place where ever there is a chance of crowd, they are present in all those places. Either it may be Mall, Railway Station, Temples, etc. Ever thought how they function. No Right, so this blog is for ‘You’.

Firstly, there are different types of Metal detectors, Hand-Held Device, Gate Keeping Devices, Ground searching devices.

History of Metal detectors:

The Metal detectors were introduced/invented to search antique items and gold under the ground and later used by military for searching the hidden Land mines in war prone areas.

The size of the Machine Were Big and Bulky but Powerful and Efficient in their job. Later on, they came into security purposes with light, portable but less Powerful. (To compare, the bigger ones are able to detect even a small knife and a small pin which is at 4, The bigger ones was able to detect even a small knife and a small pin which is at 4 ft. below the ground. But, the lighter ones can detect a small knife at distance of 1 ft. but not a small pin.) So let’s see How they work

Functioning Principle of a Metal Detector:

 The main principle on which the Metal detector works is Based on Maxwell’s equations. He is the one who showed, the Omni present couples (Adarsha Dampatigalu) of the world- The electricity and The Magnetism by his equations.

In this world, where ever you see Electricity you see Magnetism and where ever you see Magnetism you see Electricity. This is the principle behind Motors and Generators, where you have electricity you produced magnetism and where you have magnetism you have electricity.

Working of Metal Detector:

There are two coils present in scanning area (whatever type of detectors it may be) transmitting coil and receiving coil. The Transmitter coil has Circuitry which converts the given voltage to magnetic field and conveys; The waves take elliptical path to receiver coil because of properties of magnetism.

If any Metallic object interferes the field, the electrons of the metal object changes there spins due to influence of the magnetic field radiated by transmitter coil.

Due to spins, there is disorientation. Due to disorientation there is electricity is generated. Since electricity is produced in metal, the metal radiates its magnetic field. So extra magnetic field is produced and it is received by the receiver coil.

There will be a Controller which measures the received magnetic field and compares with the transmitted magnetic field. According to the compared field the voltage is sent to the Buzzer Which Loudens or Softens the sound based on the voltage given. Hence when the detector is close to the Metal object or the metal object is big the sound of buzzer is loud.

This is how the Metal detector work. Hope You Have Understood. Don’t forget to comment, +1, recommend and feel free to share. But don’t copy.

And the scanner you see at the exit of shopping malls are not Metal detectors they are RFID scanner, to know more about that Follow my blog.

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Do you know about Y-Connector??!

A Y cable/connector is a self deshere ing name of a type of cable containing three ends of which one is a common end that in turn leads to a split into the remaining two ends. When looked upon, a Y-cable can resemble the Latin letter "Y".

When using Portable devices like Hard Drive, SSD(Solid State Drive). When an hard disk/ SSD are working on there full swing they may lack some power from your computer's USB port. Which are the only source of power for these Portable devices.

practically an USB 2.0 port supplies a current of 500mA, but these advanced high speed devices require current of 660mA to 800mA. This causes disconnection of the devices while reading /writing of data, Which is very irritating :X
But this is not a big problem with an USB 3.0 port as its supply is up to 1A.. (But earlier versions of USB 3.0 has shown the same disconnection problem )

This problem can be overcome by using a Y Power Cable/Connector. It is similar to normal USB cable/connector but the only difference is it has one more USB male(secondary) pin to give extra power from other USB port, when the primary supply gets insufficient power.

Make your own Y-Connector. Click here http://m.youtube.com/watch?v=dCnhb8BfVfg

Google introduced DATA SAVER Extension for its Chrome browser

It is a very common technique to save data on mobile phones using various compression techniques or browsers,but when it comes for pc it looks quite difficult,most of the ISP(Internet Service Provider) have data cap so it is really wasteful to use it with higher consumption rate,If you share your internet connection with your friends,family and other people the need for data saving increases,Google data saver extension is a very powerful tool,it is meant to reduce the data consumption while you browse the internet.

The extension works by compressing the incoming data that will,that will ultimately result in overall reduction of data usage,it is currently in its beta stage,Data saver extension will also help ,in enhancing your security,the websites pass through google servers which checks them for any virus/malwares ,therefore the extension will help you save the data as well as prevent malwares,as the pages will pass through google servers SSL and incognito page will not be included :((

To install this extension just go to this link and add it to chrome,after adding it you can manage the settings and view the data saved from top right,data saver is also available for chrome on mobiles for iOS and android which can be triggered from settings option,after installing the extension,you will feel the difference,in speed along with the data consumption rate,this will add up to your cost saving,let you save more data.

Enjoy Technology:))