Sensor technologies for the detection of transparent objects in a variety of different applications are well known. However, such solutions sometimes have a number of disadvantages in practical applications and therefore present users with challenges time and again. An optical sensor system that works with UV light could change all that. Optical sensors (retro-reflective sensors) that work with red or infrared light or ultrasonic sensors are usually used for the recognition of transparent objects. Both methods have proven their worth, but they also have their pitfalls. The calibration of conventional optical sensors is carried out according to the 2-point method. Here, the devices are first taught without an object between the reflector and the sensor and then with an object to be detected in the light barrier. Finally, the sensor automatically determines a switching threshold from the resulting limit values.
The complete application report can be found in the following PDF file.
