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WorksheetsVex Sensors
Total questions: 19
Worksheet time: 12mins
What are sensors?
Sensors are big boxes which have robots inside them
Sensors take in input information for the robot about its surroundings.
Sensors make the robot move
Sensors are robots which help to see things
The line tracking sensors need to be positioned this far away from the ground to be used properly:
1 inch (2.54 cm)
0.5 inch (1.25 cm)
1/8 inch (3 mm)
What range of values do the Light Sensor Line Follower/Tracker provide?
0 (brightest) - 4095 (darkest)
0 (darkest) - 127 (brightest)
-63 (brightest) to 63 (darkest)
0 (darkest) - 4095 (brightest)
The ultrasonic sensor can measure objects
by sending and receiving soundwaves
by sending and receiving lightwaves
by sending and receiving lasers
The Ultrasonic Rangefinder (sonar sensor) can give distances in what units
ft & miles
mm, cm & in
mm, dm, m
yards
Why does the Ultrasonic Sensor have two openings in the front ?
One opening is for sending out the sound waves and One opening is for receiving the returning sound waves
It is necessary for the robot to see where it is going
A bat has two eyes to see better so the robot needs two eyes as well
Just for decoration purposes.
The bumper switch and limit switch give values of 1 when pressed and 0 when released
True
False
The gyro sensor returns values in degrees.
True, the gyro sensor returns values in degrees
False, the gyro sensor returns values in tenths of a degree
False, the gyro sensor returns values in radians
What must be done before the gyro sensor can be used in your program?
The robot must sit perfectly still for a couple seconds in order to calibrate itself before the rest of the program can be run.
The robot must drive straight for a couple seconds in order to calibrate itself.
The robot must spin in a circle for a couple seconds in order to calibrate itself.
When mounted correctly, the gyro sensor measures the following:
detecting whether the robot is turning clockwise or counter-clockwise (yaw) and how much it is rotating
detecting whether the robot is tilting forward or back (pitch) and how much it is tilting
detecting whether the robot is tipping side to side (roll) and how much it is tipping
What is the quickest way to determine whether a sensor is analog or digital using RobotC?
Motors and Sensors Setup window
Download the program to the robot
Ask Mrs. Hollenback
Digital sensors send signals to the cortex of HIGH (1) and LOW (0).
True
False
In some Robotics applications, we need a robot to follow a dark line. Help the programmer to choose the appropriate sensor from the following?
line tracker/follower
gyro sensor
ultrasonic sensor
touch sensor
In some Robotics applications, we need a robot to aware when get hit. Help the programmer to choose the appropriate sensor from the following?
light sensor
sound sensor
ultrasonic sensor
bumper sensor
What does it mean if a value of -1 is returned for the ultrasonic/sonar sensor?
A value of –1 means that the object is out of range/too far away.
A value of –1 means that the sensor is broken.
A value of –1 means that the object is too close.
When your robot needs to make very precise turns, this sensor would be used
gyro sensor
ultrasonic sensor
limit switch
light sensor
What rules must you use when connecting the Ultrasonic Rangefinder?
Both sets of wires must be connected to consecutive analog ports with the INPUT wires plugged into the lower port number
Both sets of wires must be connected to analog ports
One set of wires is connected to an analog port and the other to a digital port
Both sets of wires must be connected to consecutive digital ports with the INPUT wires plugged into the lower port number
