Automatic Gas Sensor Calibration System Design

• Main Authors: LI, CHUN-HSIEN, 李俊賢
• Other Authors: TIAN, CING-CHENG
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/14868998369562854039

碩士 === 中華大學 === 電機工程學系 === 105 === Environmental sensors are the important roles in the current Internet of things applications because environmental detection is closely related to human life. Gas sensors of the environmental sensor have great development potential and market opportunities. In this thesis, semiconductor gas sensors have been used to build up the low cost digital output gas sensor module. However, the accuracy of the semiconductor gas sensor was lower than other chemical gas sensors and need to be calibrated to improve the sensor quality. This work was focused on the implementation of automatic calibration system for digital type gas sensors, including the PC terminal software programming, control master / sensor slave hardware and firmware design. The Master Board received commands from Host PC and passed to Sensor Module or received responses from Sensor Module and passed to Host PC. Finally, the Host PC builds Log reports to system manager for reviewing the calibration results. The verification results of Host commands and digital sensor protocol have been discussed in Chapter 6 and shown very good agreement with all defined specifications.