Measurement of Unknown concentraion using IR

mastermindjp · Joined: 18 Dec 2012 Posts: 51 Location: INDIA

Hello friends,

I am working on this project in which i need to measure the unknown (component) concentration of a solution using IR spectrum.
I have used ATMEGA32 with two 12Bit external ADC, connected the sensor output to the ADC, receiving data. First i used known concentration to draw a graph and get a linear equation, loaded that equation in controller and use it to measure value of unknown concentration.

Problem here is that raw known concentration is a mixture of various components whereas i only need to measure a particular component. For which i used specific wavelength of IR, and observing Transmittance and Scattering using two sensors, feeding to two ADC's and calculating the values.

Results are on display but with few errors, one is due to the noise, which can be rectified, but one error is of getting false measurement (2 out of 10 samples), how i can overcome this error? Is there any way to sort it out using code or i need to be more specific with wavelength selection and hardware??

Kindly guide.

Thank you

Regards

Aniruddha