LEGO Mindstorms EV3 Посібник користувача - Сторінка 16
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EV3 TECHNOLOGY
EV3 Sensors
Infrared Sensor and Remote Infrared Beacon
The Infrared Sensor is a digital sensor that can detect infrared light
reflected from solid objects. It can also detect infrared light signals
sent from the Remote Infrared Beacon.
The Infrared Sensor can be used in three different modes: Proximity
Mode, Beacon Mode, and Remote Mode.
PROXIMITY MODE
In Proximity Mode, the Infrared Sensor uses the light waves reflected
back from an object to estimate the distance between the sensor
and that object. It reports the distance using values between 0 (very
close) to 100 (far away), not as a specific number of centimeters or
inches. The sensor can detect objects up to 70 cm away, depending
on the size and shape of the object.
For more information, see Using the Infrared Sensor Proximity Mode
in the EV3 Help files.
BEACON MODE
Choose one of the Remote Infrared Beacon's four channels from
the red Channel Selector. The Infrared Sensor will detect a beacon
signal matching the channel that you specify in your program up
to a distance of approximately 200 cm in the direction it is facing.
Once detected, the sensor can estimate the general direction
(heading) of and the distance (proximity) to the beacon. With this
information, you can program a robot to play hide-and-seek, using
the Remote Infrared Beacon as the target of its search. The heading
will be a value of between -25 and 25, with 0 indicating that
the beacon is directly in front of the Infrared Sensor. The proximity
will be values between 0 and 100.
For more information, see Using the Infrared Sensor Beacon Mode
in the EV3 Help files.
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Infrared Sensor
70 cm / 27 inch
70cm / 27inch
Proximity Mode
200 cm / 79 inch
200cm / 79inch
Beacon Mode
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