Vehicle Speed Detection using Arduino and IR Sensors

Abstract - There are definite rules laid out by authorities about driving cars on roads. The most common rule in any country is speed limit in certain roads i.e. you will be in violation of the law if your car speed exceeds this limit.In order to detect the speed of a moving car, the patrolling officers usually depend on a handheld gun that works on Radar Technology or Lidar Technology. This is a tedious process as the officer has to manually check for over speeding for each vehicle. Vehicle Speed Detection or Vehicle Speed Measurement using IR Sensor and Arduino UNO In this tutorial, we will measure the speed of the vehicle using IR sensor, Arduino, and 16×2 LCD. In this project, we will use two IR sensors and place it at a certain distance. As we know that to measure the speed we need distance and time. In order to find time, we will use the logic that the first IR sensor will detect whether there is some vehicle present in front of the sensor or not. Then the timer will start and will measure the duration up to the second IR sensor. The time we will get will be in milliseconds, so, in order to convert milliseconds into seconds, we will divide it by 1000. In this project, we have placed the two IR sensors at a distance of 20 centimeters which is equal to 0.2 meters. Now, we want our measured speed to be displayed in the kilometers per hour. So, in order to get the values in the kilometer per hour, we will use the following equation. 1m/s = Km/1000 x 3600/hr = 3.6Km/ hr 1m/s = 3.6Km/hr This logic will be used in our coding to measure the speed of the vehicle. Keyword: Arduino, IR sensor, Buzzer, Lcd display, Speed, Vehicle