[Development of a portable SOM detector based on NIR diffuse reflection].

  title={[Development of a portable SOM detector based on NIR diffuse reflection].},
  author={Min-zan Li and Luan Pan and Li-hua Zheng and Xiao-Fei An},
  journal={Guang pu xue yu guang pu fen xi = Guang pu},
  volume={30 4},
A portable soil organic matter detector based on near infrared diffuse reflectance was developed. The detector uses a microprocessor 89S52 as the micro controller unit (MCU) and consists of an optical system and a control system. The optical system includes an 850 nm near-infrared LED lamp-house, a lamp-house driving-circuit, a Y type optical fiber, a probe, and a photoelectric sensor. The control system includes an amplifying circuit, an A/D circuit, a display circuit with LCD, and a storage… CONTINUE READING

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