Aiming at the problem that the existing food safety detectors has low sensitivity and accurately and quantitative detection can not achieve

a quantitative and quick detector for food safety is designed

which can quickly detect many kinds of food contaminants. The food sample is processed with the up-conversion material

then it can produce characteristic fluorescence

the detector with STM32 F103 C8 T6 microcomputer as the core is designed to detect the fluorescent signal

including signal detection optical path system

signal processing circuit system

and embedded master program software design. The experimental results show that the detector has characteristics of low power consumption

small volume and high accuracy. The actual sample detection recovery rate is at range of 97. 5 %～ 105 %

which meets the requirements of rapid detection.