The Qti infrared sensor
This compact QTI infrared sensor is ideal for mobile robots that have to follow a line on the ground, to solve a maze, to distinguish the edge of a sumo ring or to navigate around obstacles. The QTI sensor consists of an infrared emitter and an infrared receiver. It can distinguish the dark areas with low reflectivity such as a black line on the ground and the white areas with high reflectivity.
The infrared Qti sensor can be connected in two ways:
- Digital connection: for fast binary black/white line following
- Analog connection : able to measure different shades of gray
What does QTI stand for?
- Q: Charge
- T: Transfer
- I: Infrared
When your microcontroller measures the time it takes for the QTI's capacitor to decay, it's measuring a rate of charge transfer through an infrared phototransistor. This rate indicates how much infrared is reflecting off a nearby surface.
Technical specifications of the Qti infrared sensor
Functional and technical specifications of the QTI infrared sensor are as follows:
- Digital or analog outputs
- No-contact surface sensing
- Unfocused for sensing diffused surfaces
- Daylight filter on sensor
- Easy to interface with any Parallax microcontroller
- Power: 5V
- Dimensions : 31.7 x 9.4 mm
- Operating temp range: de -40°C à +85°C
The Qti Infrared sensor is ROHS compliant
Technical documentation of the Qti infrared sensor