Ultrasonic Sensor

Measure the distance to an object: 0.02 to 2.0 meters (m)

Library

Simulink Coder Support Package for ARM Cortex-based VEX Microcontroller/Sensors

Description

Measure the distance of the object in the path of the robot by using high-frequency sound waves. The block enables the object detection when it is in the range from 0.02 through 2.0 meters of the sensor. The block outputs a value 0 for an object that is farther than 2 meters.

During simulations, without the hardware, this block emits zeroes if no Source block is connected to the simulation input port. See Block Produces Zeros or Does Nothing in Simulation (Simulink). To achieve simulation behavior, connect a Source block from the Utilities library in VEX Microcontroller library . During code generation, any simulation block that is connected to the input port of the Ultrasonic Sensor block is ignored and has no effect on the generated code.

Parameters

INPUT (Ping port)

Select the digital port to which the connector ‘INPUT’ of the ultrasonic sensor is connected. To know the INPUT port, click the What is INPUT and OUTPUT? button on the block parameters dialog window.

OUTPUT (Echo port)

Select the digital port to which the connector ‘OUTPUT’ of the ultrasonic sensor is connected. To know the OUTPUT port, click the What is INPUT and OUTPUT? button on the block parameters dialog window. You can select any port number for OUTPUT except port number 10.

Add input port for simulation

Select this check box, if you want the normal mode simulation with a source block providing the input value.

Sample time

Specify how often this block reads the distance, in seconds. If you select Add input port for simulation check box, the Sample time parameter is hidden and the value is inherited (Sample time = -1).