IR Seeker Sensor

 

 

You can use most TV remotes and LEGO® Power Functions remotes as beacons that the IRSeeker V2 will detect.   This course uses the Hitechnic Infrared Electronic Ball.   With a specially designed curved lens and five internal detectors, the IRSeeker V2 has a 240 degree view making it perfect for playing robot soccer with the HiTechnic IRBall.

 

The sensor returns the signal direction and strength making it easy to locate and gauge the relative distance to the target.

The NXT IRSeeker V2 (Version 2) is a multi-element infrared detector that detects infrared signals from sources such as the HiTechnic IRBall soccer ball, infrared remote controls and sunlight. It is perfect for robot soccer competitions.

The IRSeeker V2 operates in 2 selectable modes,

 

      ♦  Modulated (AC) Mode - The sensor will detect modulated IR signals such as those from the HiTechnic IRBall or some IR remote controls. In Modulated mode the sensor

          will filter out most other IR signals to decrease interference from lights and sunshine for example. The sensor is tuned to square wave signals at 1200Hz.

 

      ♦  Un-modulated (DC) Mode - The sensor will detect un-modulated IR signals such as older style IRBalls or sunlight.

           The IRSeeker V2 uses advanced digital signal processing techniques to filter the signals received and select only the signals required. A newly designed housing with a

           constant radius curved end cap increases directional peformance by minimizing distortion of light signals entering the sensor.

 

The IRSeeker direction values are shown here with 1 indicating the infrared target is left and behind, 5 if the target is directly ahead and 9 if the target is to the right and behind. A value of 0 is returned if no signal is detected.   Programming using Mindstorms NXT-G   All IRSeeker V2 functions can be accessed using the MINDSTORMS NXT-G programming block that can be downloaded from the download page.   HiTechnik IR Ball for Soccer http://www.hitechnic.com/cgi-bin/commerce.cgi?preadd=action&key=IRB1005 NXT IR Seeker from HiTechnik http://www.hitechnic.com/cgi-bin/commerce.cgi?preadd=action&key=NSK1042