Sound sensor nxt robot
The Touch Sensor from Lego. Works like a button, once pressed it closes a circuit. Useful as stop button for moving parts, like feet or as a last resort to stop your Mindstorms creation when it hits a wall. You probably should use this sensor when you need to navigate in tight spaces.
Other than the ultrasonic sensor, the EOPD is using light to measure distances. The closer the sensor is to a magnet, the higher the value should be. They claim to be able to detect seventeen different colors and best of all, the sensor is trained for the standard Lego Colors, so building a Mindstorms Robot that can sort Lego bricks by color should be easy with this Sensor.
HiTechnic Amazon , HiTechnic , Lego Line Sensor from mindsensors Mindsensors developed a Line Sensor which basically is an array of eight light sensible sensors, each with its own light source. These kinds of sensors normally are used to build moving robots that follow lines.
As far as I understood there are some Lego sets, like trains or motor powered sets that are controlled via Infrared. If you want to detect where an Infrared Signal is coming from, you basically have two choices: This Sensor consists of a special shaped Lens and actually five internal sensors that are able to watch a field of degrees. You wont get an accurate degree reading with this sensor but rather values between 1 and 9 that at least give you a sense where to go to.
The camera, or better the software block that controls the camera is able to track 8 different user defined colors at 30fps. Very helpful when building robots that collect stuff or follow lines.
It sends latitude, longitude, time, speed and heading to the NXT. Perfect for autonomous robots that need to know their exact location. The frequency and the signal amplitude were gradually changed and the sensor readings were noted manually and entered into an Excel-file and also into a LabVIEW 3D-graph program that we do not reproduce here.
The NXT dB-values in function of the frequency The sensor is more sensitive in dB-mode and rapidly clips, in the presence of medium strength signals. In the case of frequencies below Hz, the values even decrease with growing signal intensity.
The following graphs Fig. The corresponding graph Fig. On the graph we add the 60 Phons human sensitivity curve as a reference.
The extreme deviating value at 3kHz is intriguing. We repeated the experiment to be sure this is not a mistake. The graphs draws the NXT sound sensor response for different frequencies, while the sound pressure level has been held constant.
NXT sensor sensitivity at medium loudness. This graph is drawn on the base of constant sound pressure level. The dBA curve from Fig. We did not trust our first measurements, so we tried another time with a different sensor. This time the response Fig. A second attempt shows unreliable response around 3kHz.
Thx soo much for putting this up! It helped me a ton with my homework! Leave a Reply Cancel Reply Your email address will not be published. Ultrasonic Sensor from Lego.
Touch Sensor from Lego. Probably the most simple sensor for a Mindstorms robot: Unlike the compass sensor, this Magnetic Sensor from HiTechnic will not tell you the offset to the magnetic field in degrees but rather a reading of the distance to a magnetic field.
Sound Sensor from Lego. Always wanted to build a robot that can listen to your commands? Color Sensor v2 from HiTechnic. Amazon , HiTechnic , Lego. Line Sensor from mindsensors. Mindsensors developed a Line Sensor which basically is an array of eight light sensible sensors, each with its own light source. IRLink Sensor from Hitechnic. The Gyro Sensor from HiTechnic. The NXT Gyro Sensor from HiTechnic returns the number of degrees per second of rotation as well as indicating the direction of rotation.
Compass Sensor from HiTechnic.