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| Measured Value Compensation of Mechanical Consistency Sensor Used for Pulp Based on Double Atom Library Sparse Decomposition |
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| DOI：10.11981/j.issn.1000-6842.2017.03.52 |
| Key Words:pulp consistency measuring accuracy; noise signal; sparse decomposition; flow velocity compensation |
| Fund Project:陕西省教育厅专项科技项目（16JK1105）；陕西省科技攻关项目（2016GY-005）。 |
| Author Name | Affiliation | | 周 强1 | 1.陕西科技大学电气与信息工程学院，陕西西安，710021 | | 王亚波1，* | 1.陕西科技大学电气与信息工程学院，陕西西安，710021 | | 王 莹2 | 2.陕西科技大学材料科学与工程学院，陕西西安，710021 | | 吴 祎1 | 1.陕西科技大学电气与信息工程学院，陕西西安，710021 |
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| Abstract: |
| To solve the problem of low measuring precision in the mechanical consistency sensor widely used for pulp at present, by studying the pulp fiber structure and mechanical consistency sensor measuring principle, reasons of effecting the sensors measurement precision were found. First, the noise signal was difficult to filter out from the measurement signal of the pulp consistency. Second, the pulp flow velocity had a great effect on the pulp consistency measurement. Based on the study of noise signal and its nature and the establishment of consistency sensor measurement model, sparse decomposition was used to eliminate all kinds of noise from the pulp consistency signal. At the same time, consistency sensor measurement model was used to compensate the effect of pulp flow rate on the measured consistency value. Experiment results showed that this method could significantly improve the pulp consistency measuring accuracy. |
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