Using reflected IR light, measure the distance of an opaque object 20-150cm away. Requires an IR Distance Adapter to be used with Phidgets.
This popular sensor made by Sharp produces an analog output that varies from 2.5V at 20cm to 0.4V at 150cm.
Based on "typical values" from Sharp, the formula to translate SensorValue into Distance (the formula is only valid for a SensorValue between 80 to 490) is:
This sensor can find the distance to objects that present a very narrow edge such as a wall at a very sharp angle.
Note: The output of this sensor will vary from unit to unit, and based on the characteristics of the target (reflectance, size, direction of motion, object alignment, ...). Our formula is based on the data provided by Sharp. If you find that you are not getting good results with the standard formulas, you may want to derive your own formula to better characterize your situation.
The sensor plugs in the 1101 - IR Distance Adapter using the 30cm interface cable that comes with the 1101.
All measurements are based on data provided by Sharp who used an r-27 calibration card, 90% reflectance. Based on our formula, we have calculated a minimum and maximum distance with the card at minimum and maximum distance.
We also carry two other Sharp distance sensors for shorter distance ranges.
If you are not getting good results with the standard formula, have a look at the product datasheet which has good notes on what can affect the sensor's performance
|Sensor Type||Distance (Infrared)|
|Sensor Output Type||Ratiometric|
|Measurement Distance Min||200 mm|
|Measurement Distance Max||1.5 m|
|Response Time Max||50 ms|
|Supply Voltage Min||4.5 V DC|
|Supply Voltage Max||5.5 V DC|
|Current Consumption Max||50 mA|
|Operating Temperature Min||-10 °C|
|Operating Temperature Max||60 °C|