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红外探测NXT IRSeeker V2
型号: (NSK1042)
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HiTechnic NXT IRSeeker V2 Sensor for LEGO Mindstorms NXT
商品售价:¥486.00
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HiTechnic NXT IRSeeker V2 Sensor for LEGO Mindstorms NXT

Introduction

 

IRSeeker V2

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.

IRSeeker V2

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

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.

IRSeeker Sensor Block

Display Settings

Image of block

  1. The number shows which of your NXT's ports are connected to the IRSeekerV2. You can change this number in the configuration panel if you need to.
  2. The block's data hub will open automatically when the block is placed in the work area. At least one data wire must be dragged from the block's output plug to another block's data hub. (See the Data Hub section below for more information.)

Configuring the IRSeekerV2 Block

Image of configuration panel

  1. Choose the port where your IRSeekerV2 is plugged in. By default, the block will be set to port 1 for an IRSeekerV2. You can change this selection if you need to.
  2. Chose the Mode. Two modes are available Modulated (AC) and Un-modulated (DC).

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 the older style IRBall or sunlight.

IRSeekerV2 block Data Hub plugs

You must click on the Data Hub to open it as shown.

Image of block

  1. This plug wires the number of the port that the IRSeekerV2 is connected to.
  2. This plug outputs the direction value.
  3. This plug selects the mode the sensor is operating in, 0 = Modulated Mode (AC), 2 = Un-modulated (DC) mode.
  4. This plug outputs the source detected logical value.
  5. This plug outputs the Channel 1 signal strength value.
  6. This plug outputs the Channel 2 signal strength value.
  7. This plug outputs the Channel 3 signal strength value.
  8. This plug outputs the Channel 4 signal strength value.
  9. This plug outputs the Channel 5 signal strength value.

The five strength values available make it possible to determine the approximate distance to the infrared source if it is of a known brightness. The five strength values come from five infrared sensors which are oriented to face in the 1, 3, 5, 7 and 9 directions. Internally, the sensor will interpolate the readings between these five primary directions to obtain the direction values 2, 4, 6 and 8.

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LEGO-北京乐高机器人/FTC竞赛机器人/FLL世锦赛机器人/赛前辅导/机器人教室建设/校园创客教室

LEGO-北京乐高机器人/FTC竞赛机器人/FLL世锦赛机器人/赛前辅导/机器人教室建设/校园创客教室