Ultrasonic Sensor Interfacing and Programming Guide
Discover how to interface and program the Vex Ultrasonic Sensor, understanding its working principle, connection to the controller, and programming steps for effective distance measurement in robotics projects.
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Presentation Transcript
Vex Ultrasonic Sensor (US) Interfacing and Programming
Ultrasonic Sensors Generally have a transmitter and receiver. d = (v)(t) Round-Trip Distance Transmits a high- frequency sound. d = (v)(t)/2 One-Way Distance Waits to receive echo. Calculates distance based on time it took to receive the echo. d = distance, v = speed of sound, t = time to receive echo 2
The Vex Ultrasonic Sensor INPUT Sends ultrasonic wave Connect to digital output of the controller OUTPUT Receives the echo Connect to the input of the controller The labeling is a bit counter-intuitive! 3
Ultrasonic Sensor Programming The following statement starts an ultrasonic sensor i.e., the sensor starts sending and recording the sound signals. Sensor connected to output port 6 through which it receives digital control signals from the controller. StartUltrasonic ( 5, 6 ) ; Sensor connected to input port 5 Select start Youssefi 5
Ultrasonic Sensor The following statement is used to read a value from the sensor Range = GetUltrasonic ( 5 , 6 ); The sensor is connected to output port # 6 on the controller Variable into which the translated value is stored Input to Ultrasonic port #5 Select Get option Define variable Range Youssefi 6
Cortex Controller Select Config to Change input port #6 to an output port Change port 6 from input to output by clicking on the circle Digital ports taken by the IRB Hsu/Youssefi 7
Input to Ultrasonic sensor connected to output port 6 on controller Output from Ultrasonic sensor connected to input port 5 on controller Checking if the obstacle is near or far Hsu/Youssefi 8
