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How do ultrasonic sensors detect obstacles?
The sensor uses the time it takes for the sound to come back from the object in front to determine the distance of an object. as shown in the figure. If the object is in motion, instruments based on Doppler shift are used. The ultrasonic sensor can measure distances in centimetres and inches.
Which sensor is used in the project to detect obstacle?
It is concluded from above discussed sensors that ultrasonic sensor is best for object detection. It can be easily used in any project like for robotics or any assistance system. Ultrasonic sensor cannot be affected by any environmental factor like dark or light.
How is obstacle avoiding robot using PIC microcontroller?
The complete circuit Diagram of the this PIC based obstacle avoiding robot is shown in the above picture. As you can see we have used two IR sensors to detect objects on left and right of the robot respectively and a Ultrasonic sensor to measure the distance of the object that is present ahead of the robot.
How to measure distance using Arduino and ultrasonic sensor?
To learn more about measuring distance using Ultrasonic sensor and Arduino, follow the link. If the distance is greater than the defined distance means there is not obstacle in its path and it will moving in forward direction. If the distance is less than the defined distance to avoid obstacle means there is some obstacle ahead.
How can I build an obstacle avoiding robot?
We previously built Obstacle Avoiding Robot using Raspberry Pi and using PIC Microcontroller. This time we will build an Obstacle avoiding robot using an ultrasonic sensor and Arduino. Here an Ultrasonic sensor is used to sense the obstacles in the path by calculating the distance between the robot and obstacle.
Why is a motor driver required in a PIC microcontroller?
A motor Driver module like L293D is mandatory because the amount of current required for running the DC gear motor cannot be sourced by the I/O pin of the PIC microcontroller. The sensors and the module is powered by the +5V supply which is being regulated by the 7805.