FIRST LEGO League Challenge Sensors: Difference between revisions

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== [https://education.lego.com/en-us/products/ev3-color-sensor/45506?gclid=CjwKCAjw4MP5BRBtEiwASfwALwELNY2AQNM3rGHGPZ5zit0wSCZxLRK1ezudZzWxxakFcv7NySie2RoCmOgQAvD_BwE&ef_id=CjwKCAjw4MP5BRBtEiwASfwALwELNY2AQNM3rGHGPZ5zit0wSCZxLRK1ezudZzWxxakFcv7NySie2RoCmOgQAvD_BwE:G:s&s_kwcid=AL!790!3!445977090943!b!!g!!&Buffer&cmp=KAC-INI-GOOGUS-GO-US-EN-RE-PS-BUY-CREATE-DSA-SHOP-XX-XX-RN-XX Color sensor] ==
== [https://education.lego.com/en-us/products/ev3-color-sensor/45506?gclid=CjwKCAjw4MP5BRBtEiwASfwALwELNY2AQNM3rGHGPZ5zit0wSCZxLRK1ezudZzWxxakFcv7NySie2RoCmOgQAvD_BwE&ef_id=CjwKCAjw4MP5BRBtEiwASfwALwELNY2AQNM3rGHGPZ5zit0wSCZxLRK1ezudZzWxxakFcv7NySie2RoCmOgQAvD_BwE:G:s&s_kwcid=AL!790!3!445977090943!b!!g!!&Buffer&cmp=KAC-INI-GOOGUS-GO-US-EN-RE-PS-BUY-CREATE-DSA-SHOP-XX-XX-RN-XX Color sensor] ==


== Ultrasonic sensor ==
== [https://education.lego.com/en-us/products/lego-mindstorms-education-ev3-ultrasonic-sensor/45504 Ultrasonic sensor] ==
The Ultrasonic Sensor returns the distance to an object in centimeters or inches. It gives the most accurate readings when it is mounted low on the robot and it takes readings to flat objects that are at right angles to the direction that the sensor is pointing. It will be less accurate when it is pointed at an object that is at an oblique angle or is round or cylindrical.
The Ultrasonic Sensor returns the distance to an object in centimeters or inches. It gives the most accurate readings when it is mounted low on the robot and it takes readings to flat objects that are at right angles to the direction that the sensor is pointing. It will be less accurate when it is pointed at an object that is at an oblique angle or is round or cylindrical.



Revision as of 17:53, 25 August 2020

Sensors are used to serve as the "eyes and ears" of the robot to allow it to navigate on the playing field. Both the Mindstorms EV3 set and the SPIKE Prime set contain a collection of sensors that can be plugged into sockets (called ports) on the robot's hub. Team members can write programs that use the sensors to control the turns of the robot, keep it driving relatively straight, detect collisions or pending collision with obstacles, detect colors on the playing field, follow lines, etc. Using sensors can make the difference between a robot that sometimes reaches its goal and one that almost always does, allowing it to rack up points much more consistently.

SPIKE Prime Sensors

Force sensor

The force sensor allows the robot to measure newtons of force. This could allow the robot to use a lever arm to detect that it is getting close to a wall and adjust its course. Alternatively, the sensor can used as an on-off switch to determine what part of a program should be used.

Color sensor

Ultrasonic sensor

The Ultrasonic Sensor returns the distance to an object in centimeters or inches. It gives the most accurate readings when it is mounted low on the robot and it takes readings to flat objects that are at right angles to the direction that the sensor is pointing. It will be less accurate when it is pointed at an object that is at an oblique angle or is round or cylindrical.

Gyro sensor

The gyro sensor is built into the SPIKE Prime hub. While it can measure angular acceleration in three dimensions, the most common use is to measure how far the robot has turned to allow it to execute more precise turns.

Mindstorms EV3 Sensors

Touch sensor

Color sensor

Ultrasonic sensor

The Ultrasonic Sensor returns the distance to an object in centimeters or inches. It gives the most accurate readings when it is mounted low on the robot and it takes readings to flat objects that are at right angles to the direction that the sensor is pointing. It will be less accurate when it is pointed at an object that is at an oblique angle or is round or cylindrical.

Gyro sensor