The Research Of The Detecting System For Bioluminescence Based On APD

This paper discusses a new kind of detecting system for bioluminescence which based on APD. And it is compared to the traditional method of the measure.The device measures the strength of the bioluminescence and as the signal. And it amplifies and analyzes the signal to get the consistence of the ATP or the bacteria. The result can be displayed by LCD, printed and stored in SD or eeprom. The device is fast and portable. It makes a great contribution to the control of food quality.PID controller arithmetic is applied to make a static temperature environment. The Active-Quenching Circuit improves the stability of the APD. All these effort makes the device work more exactly.