The main purpose of the ROV is to survey infrastructure underwater. In order to accomplish this we are using a camera mounted on the top however as a backup we will also be using a Ultrasonic PING Sensor to detect when the ROV comes to close to an object in front of it.
We wanted the PING Sensor to effectively act as a radar. In order to accomplish this we will mount the sensor on a servo and have it rotating constantly over a range of 180 degrees. A video of our test is shown below:
While the servo is rotating the sensor constantly takes readings to determine how close an object is to the ROV. If its too close it will give a more accurate reading as well as a warning to tell you this.