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Sensors used in my robotics

 




The above sensors are currently being used in some of my robots.
Above left pic: GP2D12
The GP2D12 infrared sensor takes a continuous distance reading and reports the distance as an analog voltage with a distance range of 10cm (3.9") to 80cm (31.5").

The interface is 3-wire with power, ground and the output voltage.

Simply provide power and ground, and read a continuous analog voltage representing distance. A software lookup table can be implemented to translate the voltages to distances.
Left mid pic: GP2D120

The GP2D120 infrared sensor takes a continuous distance reading and reports the distance as an analog voltage with a distance range of 4cm (1.5") to 30cm (11.8").

The interface is 3-wire with power, ground and the output voltage.

Simply provide power and ground, and read a continuous analog voltage representing distance. A software lookup table can be implemented to translate the voltages to distances.

Above right pic: GP2Y0D02YK
This sensor takes a continuous distance reading and reports the distance as a logic value with a pre-set distance range of 80cm (~30"). The GP2Y0D02YK has identical electronics to our GP2D15, but has special optics that give it a much longer detection range. The distance threshold is preset at the factory and cannot be adjusted for this sensor.

Right mid pic: QTI
A closer look at the QTI
The QTI module is designed for close proximity infrared (IR) detection. Take a look at the small square black box just above the QTI label. It's nested below the capacitor and between the two resistors. That's a QRD1114 reflective object sensor. There's an infrared diode behind it's clear window and an infrared transistor behind it's black window. When the infrared emitted by the diode reflects off a surface and returns to the black window,It strikes the infrared transistor base, causing it to conduct current. The more infrared incident on the transistors base, the more the current it conducts. When used as an analog sensor, the QTI can detect shades of grey on paper and distances over a short range if the light in the room remains constant. With this circuit, you can set P3 high and then test it with RCTIME to measure how long it takes the capacitor to discharge through the IR transistor. Since the IR transistor conducts more or less current depending on how much IR it receives, the RCTIME measurement can give you an indication or distance or shade of grey.

Available from here:
http://www.parallax.com/Store/Sensors/ObjectDetection/tabid/176/CategoryID/51/List/0/Level/a/ProductID/100/Default.aspx?SortField=ProductName%2cProductName

Proximity Detector Bottom right (IRPD).
I acquired these from bluebell design. http://www.bluebelldesign.com/


Center and bottom left pic:
Other types of IR emitters and detectors that I use, All have different filters and ranges.

Parallax ping Ultra sonic sensor:



Available from here:
http://www.parallax.com/Store/Sensors/ObjectDetection/tabid/176/CategoryID/51/List/0/Level/a/ProductID/92/Default.aspx?SortField=ProductName%2cProductName


Parallax PIR sensor:



Available from here:
http://www.parallax.com/Store/Sensors/ObjectDetection/tabid/176/CategoryID/51/List/0/Level/a/ProductID/83/Default.aspx?SortField=ProductName%2cProductName

Also check out this hack for these PIR sensors by Keith Neufeild
http://www.neufeld.newton.ks.us/electronics/?p=208#comments

QRB 1134 IR Photoreflector:





Data sheet here: http://www.trossenrobotics.com/PhidgetDatasheets/QRB1114.pdf

CBA wheel encoders:



These are a kits in pairs and are very easy to construct. Available from here:

CBA Line following sensor:



Again from Budgetbot this line sensor works well, Notice that the five IR modules can be inserted in any combination in those IC sockets. This was built from a kit.
Available from here: http://www.budgetbot.com/CBA_wem.html

Mercury tilt switch:



These mercury tilt switches are very handy for robotic sensors for tilt inclination

QRD 1113/1114 Reflective object sensor:



These are used in my wheel encoders and other close sensing.
data info here: http://www.trossenrobotics.com/PhidgetDatasheets/QR_QRD1113.pdf

My latest sensor for my next robot. Thereminvision-II



The four sensors have an aerial on each board [ Not shown] these sensors detect capacitance and are used as distance sensors, they are connected to the main processor in the center and that is connected to the basic stamp.



a single sensor.



This is a close up of the processor for the four sensors. This was a kit and was easy to build.
Link here: http://thereminvision.com/version-2/TV-II-index.html




TSL230 Light to Frequency Converter
Specs here:

http://www.parallax.com/Store/Sensors/ColorLight/tabid/175/CategoryID/50/List/0/Level/a/ProductID/88/Default.aspx?SortField=ProductName%2cProductName





The reed switches are from PC keyboards and are very useful in robotics.

I hope this has helped you in choosing a sensor for your robotic project.

 2007 © Robosapienv2-4mem8




 
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