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| Content Provider | MDPI |
|---|---|
| Author | Ye, Yong Deng, Jiahao Shen, Sanmin Hou, Zhuo Liu, Yuting |
| Abstract | A novel method for proximity detection of moving targets (with high dielectric constants) using a large-scale (the size of each sensor is 31 cm × 19 cm) planar capacitive sensor system (PCSS) is proposed. The capacitive variation with distance is derived, and a pair of electrodes in a planar capacitive sensor unit (PCSU) with a spiral shape is found to have better performance on sensitivity distribution homogeneity and dynamic range than three other shapes (comb shape, rectangular shape, and circular shape). A driving excitation circuit with a Clapp oscillator is proposed, and a capacitance measuring circuit with sensitivity of 0.21 V p − p / pF is designed. The results of static experiments and dynamic experiments demonstrate that the voltage curves of static experiments are similar to those of dynamic experiments; therefore, the static data can be used to simulate the dynamic curves. The dynamic range of proximity detection for three projectiles is up to 60 cm, and the results of the following static experiments show that the PCSU with four neighboring units has the highest sensitivity (the sensitivities of other units are at least 4% lower); when the attack angle decreases, the intensity of sensor signal increases. This proposed method leads to the design of a feasible moving target detector with simple structure and low cost, which can be applied in the interception system. |
| File Size | 18549760 |
| File Format | |
| e-ISSN | 14248220 |
| DOI | 10.3390/s16050699 |
| Journal | Sensors |
| Issue Number | 5 |
| Volume Number | 16 |
| Language | English |
| Publisher Date | 2016-05-16 |
| Access Restriction | Open |
| Subject Keyword | moving target proximity detection planar capacitive sensor sensitivity distribution |
| Content Type | Text |
| Resource Type | Article |
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