Research Article
Design of an Instrument for Liquid Level Measurement and Concentration Analysis Using Multisensor Data Fusion
Table 2
Output of capacitance level sensor for variation of solution concentration.
| Case 1: plain solution | Change in liquid level (in m) | Sensor output (nF) | Timer output (MHz) | Frequency to voltage converter output (V) | 0.10 | 17.05 | 26.3 | 0.1 | 0.20 | 27.29 | 16.2 | 0.156 | 0.30 | 39.99 | 11.0 | 0.204 | 0.40 | 51.64 | 8.5 | 0.264 | 0.50 | 63.2 | 6.8 | 0.314 |
| Case 2: 10% concentrated sugar solution | Change in liquid level (in m) | Sensor output (nF) | Timer output (kHz) | Frequency to voltage converter output (V) | 0.10 | 16.22 | 26.8 | 0.093 | 0.20 | 26.1 | 16.6 | 0.15 | 0.30 | 38.36 | 11.3 | 0.203 | 0.40 | 49.61 | 8.8 | 0.265 | 0.50 | 61.1 | 7.1 | 0.324 |
| Case 3: 20% concentrated sugar solution | Change in liquid level (in m) | Sensor output (nF) | Timer output (kHz) | Frequency to voltage converter output (V) | 0.10 | 16.01 | 27.1 | 0.106 | 0.20 | 25.5 | 17.0 | 0.148 | 0.30 | 37.27 | 11.7 | 0.216 | 0.40 | 48.08 | 9.0 | 0.277 | 0.50 | 58.7 | 7.3 | 0.336 |
| Case 4: 30% concentrated sugar solution | Change in liquid level (in m) | Sensor output (F) | Timer output (kHz) | Frequency to voltage converter output (V) | 0.10 | 14.48 | 30.2 | 0.110 | 0.20 | 23.32 | 18.5 | 0.173 | 0.30 | 34.63 | 12.5 | 0.227 | 0.40 | 44.89 | 9.7 | 0.289 | 0.50 | 55.78 | 7.8 | 0.348 |
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