Robot MarketPlace - Sharp Analog Distance Sensor 4-30cm

The GP2D120 is the shortest-range Sharp analog distance sensor we carry, featuring a detection range of 1.5" to 12". The shorter range gives you higher resolution measurements, and the lower minimum detection distance makes this sensor great for detecting very close objects. The distance is indicated by an analog voltage, making this sensor very easy to use.

The Sharp distance sensors are a popular choice for many projects that require accurate distance measurements. This IR sensor is more economical than sonar rangefinders, yet it provides much better performance than other IR alternatives. Interfacing to most microcontrollers is straightforward: the single analog output can be connected to an analog-to-digital converter for taking distance measurements, or the output can be connected to a comparator for threshold detection. The detection range of this version is approximately 20 cm to 150 cm (8" to 60").

The GP2Y0A02 uses a 3-pin JST connector that connects to the 3-pin JST cable for Sharp distance sensors (not included). It is also simple to solder three wires to the sensor where the connector pins are mounted. When looking at the back, the three connections from left to right are power, ground, and the output signal.

Features
Operating voltage: 4.5 V to 5.5 V
Average current consumption: 33 mA (typical)
Distance measuring range: 4 cm to 30 cm (1.5" to 12 ")
Output type: analog voltage
Output voltage differential over distance range: 2.3 V (typical)
Response time: 38 ą 10 ms
Package size: 29.5 x 13 x 13.5mm (1.16 x 0.5 x 0.53in.)
Weight: 3.5 g (0.12 oz)

Linearizing the Output
The relationship between the sensor's output voltage and the inverse of the measured distance is approximately linear over the sensor's usable range. The GP2D120 data sheet contains a plot of analog output voltage as a function of the inverse of distance to a reflective object. You can use this plot to convert the sensor output voltage to an approximate distance by constructing a best-fit line that relates the inverse of the output voltage (V) to distance (cm).

Click here to add your own review or comment for this product.

4/16/2011

Anas

it is very nice distance sensor. and the price is very good. the only one problem is the nonlinear relation between distance and voltage.

1/11/2011

geoleomeo

very good sensor

it is better than what I expected because it reflects from a wide variety of surfaces not only bright white and it works reliably. however, the output needs a low pass filter because there is a lot of noise in the curve and the response of the sensor is slow when you move the obstacle quickly.