Application of Digital Temperature Sensor in Color Measurement System

The color measurement system takes silicon photocell as its photo detectors,the temperature characteristic of silicon photocell would produce influences to the measuring stability of system,and proper voltage compensating is needed to make the performance indicators more excellently.Usually,voltage can be linearity compensated base to hours,but actually the changes of the voltage value in accordance with temperature rather than hours.Digital temperature sensor DS18B20 is designed for tracking the current temperature,analyzing the linearity relation between temperature and voltage value.After achieving the coefficient of voltage compensating,voltage would be compensated by software editor.Basing on stipulations that instituted by National Institute of Metrology,the value of chromatic aberration is less than 0.15,which has already up to scratch by using DS18B20,the results indicate that this method is feasible and actuality for practical applications in the color measurement system.