Advantages of Color sensor | Disadvantages of Color sensor
This page covers advantages and disadvantages of Color sensor. It mentions Color sensor advantages or benefits and Color sensor disadvantages or drawbacks.
The sensor device which does color sensing is known as color sensor.
It works based on principle of wavelength identification of different
colors. Color sensor based systems are used for quality control applications
in the textile industries.
For example if identified wavelength is between 450 to 510 nm detected color is red, if it is between 510 to 560 detected color is green and between 630 to 780 nm it is red and so on.
Now-a-days color sensors use IR filters for accurate color measurement. It uses LDR (Light Dependent Resistor) or photo diode, LEDs, ADC, display, microcontroller in the circuit of color sensor or color detector. The color sensor has two types of outputs viz. pass/fail condition and color intensity level.
Based on their working operations, color sensors are categorized into following types.
• Light to photo-current conversion
• Light to analog voltage converter
• Light to digital conversion
The figure-1 depicts RGB color sensor arrangement.
There are many manufacturers of color sensors such as AMS AG, EMX industries Inc.
, Hamamatsu Photonics etc.
Refer color sensor basics >> for more information.
Advantages of Color sensor
Following are the advantages of Color sensor :
➨It helps in sorting of objects based on three color approach. It also helps in counting of objects.
➨Automated system can be built using color sensors which help in completion of work in less time. Moreover human intervention is not needed.
➨Powerful and large memory color sensor ICs are available at low cost. This has driven its use in many applications.
➨It is easy to change or modify manufacturing setups without even re-programing the sensor device. This is beneficial in low volume manufacturing applications having frequent color variations.
➨With the advancement of technology and memory loaded with color intensity data, color sensor controller can store and can make color matching decisions on unlimited number of colors virtually.
Disadvantages of Color sensor
Following are the disadvantages of Color sensor :
➨The approach is costly for small scale industries.
➨It does color matching or identification in applications requiring only pass/fail output.
➨Operating distance range of the color sensors are matter of concern. This needs to be choosen appropriately with rigorous testing in the setup.
Also refer application note on interfacing of color sensor >> with arduino uno board with pin to pin interfacing diagram and source code.
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