According to the characteristics of reflective intensity modulated MEMS fiber optic pressure sensor, a detection circuit system based on STC89C52 microcontroller is designed. The system is divided into photoelectric conversion module, attenuation filter module, true RMS conversion module, A/D conversion module and liquid crystal display module. Using OPT101 as photoelectric conversion device, the light intensity signal transmitted by optical fiber is converted into voltage signal. After attenuation of voltage signal, it is output to AC/DC converter and A/D converter through filter. The results are displayed on the LCD screen and can be output to the computer through the interface. The test results show that the designed circuit has high precision and resolution.
DING Zhenjun
,
AN Jialin
,
JIA Kejun
,
WEI Zihui
. Design of detection circuit system for MEMS optical fiber pressure sensor[J]. Journal of Hebei University(Natural Science Edition), 2018
, 38(6)
: 582
-587
.
DOI: 10.3969/j.issn.1000-1565.2018.06.005
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