WANG Mi-xia1, LIU Jun-tao1, LIU Ru-ping1, et al. Development of a photon-counting detecting system with high precision based on FPGA[J]. 2011, 30(2): 20-22.
WANG Mi-xia1, LIU Jun-tao1, LIU Ru-ping1, et al. Development of a photon-counting detecting system with high precision based on FPGA[J]. 2011, 30(2): 20-22. DOI: 10.13873/j.1000-97872011.02.021.
a photon-counting detecting system based on FPGA is designed and constructed.A high sensitivity photomultiplier tube(PMT)is used to obtain the optical signal.The system consists of time scheduling control module
photon-counting module
serial communication module
memory module and key-scanning control module.Adenosine triphosphate(ATP)samples with concentration of 2.5×10-14~2.5×10-8 mol/L are measured and the correlation coefficient between ATP concentration and light intensity is 0.9832.Alkaline phosphatase(ALP)samples with concentration of 2.5×10-12~5×10-9mol/L is measured and the correlation coefficient between ALP concentration and light intensity is 0.9982.The system has the characteristics of small size
high precision
and is easy to operate.It can be widely used in detection of low concentrations of substances.
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