Seed State-Detection Sensor for a Cotton Precision Dibble
In Xinjiang, precision hole-sowing technology is used for cotton cultivation. A disc-type seed disperser has problems with missing seeds and multi-seeding; therefore, an interdigital (multiple pairs of coplanar electrodes crossed) capacitance sensor is designed to determine the seed pick-up status b...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-07-01
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| Series: | Agriculture |
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| Online Access: | https://www.mdpi.com/2077-0472/13/8/1515 |
| _version_ | 1797585870399733760 |
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| author | Ling Ren Shuang Wang Bin Hu Tao Li Ming Zhao Yuquan Zhang Miao Yang |
| author_facet | Ling Ren Shuang Wang Bin Hu Tao Li Ming Zhao Yuquan Zhang Miao Yang |
| author_sort | Ling Ren |
| collection | DOAJ |
| description | In Xinjiang, precision hole-sowing technology is used for cotton cultivation. A disc-type seed disperser has problems with missing seeds and multi-seeding; therefore, an interdigital (multiple pairs of coplanar electrodes crossed) capacitance sensor is designed to determine the seed pick-up status by gathering electrical capacity information. Firstly, a theoretical derivation is performed for calculating the capacitance of the sensor, and it is concluded that the interdigital spacing, interdigital width, and interdigital logarithm all affect the output capacitance. Then, by analyzing the working process of the dibble, the assemblage position of the sensor and the dimensional constraints were determined. In order to explore the impact of various structural parameters on the sensor’s performance (signal strength and capacitance variation), a Maxwell simulation platform was established, and orthogonal tests were created to optimize the structural parameters. In addition, the STM32 microcontroller is utilized as the core, and it is linked with the PCAP01-AD chip to form a tiny capacitance-detecting circuit. Finally, the capacitance threshold division test determined the capacitance threshold at different seed states. The test results demonstrate that the interdigital capacitive sensor can accurately determine the precision dibble’s seeding status, with detection accuracies of 96.9% for normal seeding, 99.67% for miss-seeding, and 93.77% for multiple seeds. These results can be used as a research reference for capacitive seeding status-detection technology. |
| first_indexed | 2024-03-11T00:12:18Z |
| format | Article |
| id | doaj.art-3802c97567e14096898b78de6c4fe209 |
| institution | Directory Open Access Journal |
| issn | 2077-0472 |
| language | English |
| last_indexed | 2024-03-11T00:12:18Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agriculture |
| spelling | doaj.art-3802c97567e14096898b78de6c4fe2092023-11-18T23:51:11ZengMDPI AGAgriculture2077-04722023-07-01138151510.3390/agriculture13081515Seed State-Detection Sensor for a Cotton Precision DibbleLing Ren0Shuang Wang1Bin Hu2Tao Li3Ming Zhao4Yuquan Zhang5Miao Yang6College of Mechanical and Electrical Engineering, Shihezi University, Shihezi 832003, ChinaCollege of Mechanical and Electrical Engineering, Shihezi University, Shihezi 832003, ChinaCollege of Mechanical and Electrical Engineering, Shihezi University, Shihezi 832003, ChinaCollege of Mechanical and Electrical Engineering, Shihezi University, Shihezi 832003, ChinaCollege of Mechanical and Electrical Engineering, Shihezi University, Shihezi 832003, ChinaCollege of Mechanical and Electrical Engineering, Shihezi University, Shihezi 832003, ChinaCollege of Mechanical and Electrical Engineering, Shihezi University, Shihezi 832003, ChinaIn Xinjiang, precision hole-sowing technology is used for cotton cultivation. A disc-type seed disperser has problems with missing seeds and multi-seeding; therefore, an interdigital (multiple pairs of coplanar electrodes crossed) capacitance sensor is designed to determine the seed pick-up status by gathering electrical capacity information. Firstly, a theoretical derivation is performed for calculating the capacitance of the sensor, and it is concluded that the interdigital spacing, interdigital width, and interdigital logarithm all affect the output capacitance. Then, by analyzing the working process of the dibble, the assemblage position of the sensor and the dimensional constraints were determined. In order to explore the impact of various structural parameters on the sensor’s performance (signal strength and capacitance variation), a Maxwell simulation platform was established, and orthogonal tests were created to optimize the structural parameters. In addition, the STM32 microcontroller is utilized as the core, and it is linked with the PCAP01-AD chip to form a tiny capacitance-detecting circuit. Finally, the capacitance threshold division test determined the capacitance threshold at different seed states. The test results demonstrate that the interdigital capacitive sensor can accurately determine the precision dibble’s seeding status, with detection accuracies of 96.9% for normal seeding, 99.67% for miss-seeding, and 93.77% for multiple seeds. These results can be used as a research reference for capacitive seeding status-detection technology.https://www.mdpi.com/2077-0472/13/8/1515sensorcotton seedscapacitance detectionelectronicsmechanization |
| spellingShingle | Ling Ren Shuang Wang Bin Hu Tao Li Ming Zhao Yuquan Zhang Miao Yang Seed State-Detection Sensor for a Cotton Precision Dibble Agriculture sensor cotton seeds capacitance detection electronics mechanization |
| title | Seed State-Detection Sensor for a Cotton Precision Dibble |
| title_full | Seed State-Detection Sensor for a Cotton Precision Dibble |
| title_fullStr | Seed State-Detection Sensor for a Cotton Precision Dibble |
| title_full_unstemmed | Seed State-Detection Sensor for a Cotton Precision Dibble |
| title_short | Seed State-Detection Sensor for a Cotton Precision Dibble |
| title_sort | seed state detection sensor for a cotton precision dibble |
| topic | sensor cotton seeds capacitance detection electronics mechanization |
| url | https://www.mdpi.com/2077-0472/13/8/1515 |
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