Sonar

Inicializando la clase Sonar

Un telémetro se crea utilizando el siguiente constructor:

Sonar(port)

Este constructor utiliza un parámetro:

Parámetro	Descripción
port	The 3-Wire Port “pair” that the Range Finder is connected to, whether it’s a port on the Brain, or a 3-Wire Expander. Note: A Range Finder uses two adjacent 3-Wire ports. These pairs are a/b, c/d, e/f, and g/h. When entering the pair as an argument, use the first letter of the pair, ie: brain.three_wire_port.a refers to the a/b pair.

Primero se debe crear un Brain o un 3-Wire Expander antes de poder usarlos para crear un objeto con el constructor de la clase Sonar.

# Create the Brain.
brain = Brain()
# Construct a Sonar "sonar" with the
# Sonar class.
sonar = Sonar(brain.three_wire_port.a)

This sonar object will be used in all subsequent examples throughout this API documentation when referring to Sonar class methods.

Métodos de clase

distance()

The distance(units) method returns the current distance the Range Finder is detecting on object at. The Range Finder will return a large positive number if no object is detected in range.

Parámetros	Descripción
unidades	Un tipo DistanceUnits válido.

Devuelve: La distancia medida por el telémetro.

# Print the current distance detected by the Range Finder
# to the Brain's screen.
brain.screen.print(sonar.distance(MM))

found_object()

The found_object() method checks if an object is detected by the Range Finder in the range 0 - 1000 millimeters. The Range Finder will return True if an object is detected closer than 1000mm.

Returns: True if an object is detected by the Range Finder. False if one is not.

# Check if an object is 1000mm or closer to the Range Finder.
if sonar.found_object():
    # Print to the Brain's screen that an object was found
    brain.screen.print("object found")