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Project Project


A combination of sensors installed in sports equipments,To automatically give the distance of the throw.



This device will work in the games involving " Throwing " . The distance of the object thrown is usually measured by measuring tape by one or more officials . This method will change this forever. In this particular case we will be putting our focus on Discus throw. The method will involve the use of a sensor which will be placed inside the said discus and will be activated once the discus is thrown and will automatically be deactivated once the discus hits the ground . There will also be an another sensor is the discuss that will emit the data to a receiver This method will be highly effective and save a lot of time. This would not only save a lot of time but would also make the game a lot fairer .

Now-a-days the distance is measured using measuring tape and is measured by one or more referees . In this method the distance is measured from the start point to the P.O.I.(point of impact) . This is a fairly good method but many-a-times at the actual P.O.I. is not distinguishable because there is no sign of an impact on the ground due to bouncing , rather some other point is taken where some effect is seen on the ground. We'll use sensors which will be integrated in the discus and will automatically be turned on once the discus leaves the hands of the thrower , this can be done by using sensors that are activated by inertia . This reading of the distance will stop as soon as there is an impact with the ground again with the help of inertia sensitive sensors .

These sensors will allow the user to get a clear picture of the game and inculcate fair play as machines do not lie.This can be done by various types :-


  1. G.P.S. method - We can install GPS sensor onto the discus which will rely on the satellite readings. Once the discus is thrown the sensor switches on the GPS chip installed on the discus and once the discus comes in contact with the ground the GPS switches off . The distance between the switching on and off of the GPS chip will be recorded by a satellite which will send the data to the match referees computer and the data could be used for judging purposes . This method is which sounds good might work but the unreliability of the GPS data would result in some errors also range of satellites are not so accurate . This problem can be rectified by using highly sensitive GPS sensors which will give highly accurate data.


  1. Accelerometer + Gyroscope method – In this method some portion of the discuss is removed preferably the centre portion and in place of it a combination of a RFID chip , Accelerometer and Gyroscopic sensors are put and then some padding is applied so that the sensor won't break upon contact . The combined weight of the sensors and padding would be equal to the weight of the portion of the discus removed this would not affect the actual weight of the discus . These sensors will be inertia activated once the discus is thrown the accelerometer and gyroscope will get activated . An accelerometer is a compact device designed to measure non-gravitational acceleration. When the object it's integrated into goes from a standstill to any velocity, the  accelerometer is designed to respond to the vibrations associated with such movement. It uses microscopic crystals that go under stress when vibrations occur, and from that stress a voltage is generated to create a reading on any acceleration. A gyroscope is a device that uses Earth's gravity to help determine orientation.


Its design consists of a freely-rotating disk called a rotor, mounted onto a spinning axis in the center of a larger and more stable wheel. Once activated these sensor will measure the acceleration and angle of the discus. Upon impact these sensors will stop and the RFID chip will be activated which will start to emit the data then a referee would come with a sensor and get the info