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| Design of data acquisition module for high-precision mine dust monitoring system |
| Yang Min, Zhang Quanzhu, Zhao Zimei |
| nstitute of Information and Control Technology, North China University of Science and Technology, Beijing 065201, China |
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Abstract In order to prevent the occurrence of dust explosion in coal mines and improve the working environment of workers, the data acquisition module of the dust monitoring system was designed according to the high accuracy requirements of the dust monitoring system. The data acquisition module selected the chip AD8249 to form a differential input signal bridge circuit, which can perform temperature compensation and eliminate the dust sensor output voltage error caused by temperature fluctuations. The low-frequency measurement A / D converter Σ-ΔADC chip AD7712 was used to achieve a high level of dust sensor probes. Accurate acquisition and then Fourier transformed the collected data to further improve the accuracy. Test results showed that the scheme was effective and feasible, improved the measurement accuracy of the dust monitoring system, with certain practicability.
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