APPLICATIONS OF PIEZOELECTRIC SENSORS

Piezoelectric sensors have proven to be versatile tools for the measurement of various processes. They are used for quality assurance process control and for research and development in many different industries. Although the piezoelectric effect was discovered by pierrie curie in 1880, it was only in the 1950s that the piezoelectric effect started to be used for industrial sensing applications. Since then, this measuring principle has been increasingly used and can be regarded as a mature technology with an outstanding inherent reliability. It has been successfully used in various applications, such as in medical, aerospace, nuclear instrumentation, and as a pressure sensor in the touch pads of mobile phones. In the automotive industry, piezoelectric elements are used to monitor combustion when developing internal combustion engine. The sensors are either directly mounted into additional holes into the cylinder head or the spark/glow plug is equipped with a built in miniature piezoelectric sensor.

The rise of piezoelectric technology is directly related to a set of inherent advantages. The high modulus of elasticity of many piezoelectric materials is comparable to that of many metals and goes up to 1000000 N/m².Even though piezoelectric sensors are electromechanical systems that react to compression, the sensing elements show almost zero deflection. This is the reason why piezoelectric sensors are so rugged, have an extremely high natural frequency and an excellent linearity over a wide amplitude range. Additionally, piezoelectric technology is insensitive to electromagnetic field and radiations , enabling measurements under harsh conditions. Some materials used (especially gallium phosphate) have an extreme stability even at high temperature, enabling sensors to have a working range of up to 1000 °C. Tourmaline shows pyroelectricity in addition to the piezoelectric effect; this is the ability to generate an electrical signal when the temperature of the crystal changes. This effect is also common to piezoceramic materials

HOW TO HIDE FILES & FOLDERS IN JAVA PHONES

it is easy to hide a folder in java phones using .jar .jad technique . 
you should make two folders and in one of the folder you have to place all the files and folders that you want to hide and keep the another folder empty .Rename the folder that contains the files that want to hide as name.jad and Rename the another folder as name.jar  then you can see that the name.jad folder is hidden .If you want to see the hidden file you should rename the name.jar folder to any name .then you can see the name.jad folder on your mobile and you can access the files inside it .

INSTALL JAVA APPS IN YOUR JAVA PHONES EASILY

you may find difficulties in installing java apps in your java phones which are downloaded from other sites 

Here i will show you how we can install java apps easily .

For this technique you wanted to install uc browser in your mobile ( that can be easily install by downloading the uc from the app downloading link that will direct you to the mobile website ) . Then download your desired java app from any site and save it in your mobile . Then goes to the uc browser and select file manager and from that select your app file and rename it by avoiding the underscore , .jar and there must be only alphabets . 

Eg:

        the app file name : bedlamb_.jar

        the renamed app file : bedlamb

Then close the uc browser .Goes to the renamed app file and again rename it by adding .jar to the name 

Then the app is ready to use 

 

HOW TO CONECT YOUR PC TO INTERNET USING YOUR MOBILE

first you have to install the pc suit in your pc . and connect your mobile phone with your pc using a data cable or using bluetooth . then open your pc suit then connect the mobile with your pc suit . Select connect to internet icon in the pc suit then it will goes to another window there you want to select the modem , ie mobile modem . then you want to go to the next step there you want to set the access point and user name and password that you had given in the mobile settings . Then click on the finish icon and finish the steps. Press the connect icon in the pc suit and connect your pc with internet using your mobile

now enjoy the  internet in your pc cheaply