A Novel Method for Detecting the Two-Degrees-of-Freedom Angular Displacement of a Spherical Pair, Based on a Capacitive Sensor
The spherical pair has an important role in the inner frame of the stabilization mechanism of the aviation optoelectronic pod. However, its two-degrees-of-freedom (2-DOF) angular displacement signal is difficult to detect, seriously restricting its application in aviation optoelectronic pods. Theref...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-04-01
|
| Series: | Sensors |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1424-8220/22/9/3437 |
| _version_ | 1797502813008297984 |
|---|---|
| author | Shengqi Yang Yulei Xu Yongsen Xu Tianxiang Ma Hao Wang Jinghua Hou Dachuan Liu Honghai Shen |
| author_facet | Shengqi Yang Yulei Xu Yongsen Xu Tianxiang Ma Hao Wang Jinghua Hou Dachuan Liu Honghai Shen |
| author_sort | Shengqi Yang |
| collection | DOAJ |
| description | The spherical pair has an important role in the inner frame of the stabilization mechanism of the aviation optoelectronic pod. However, its two-degrees-of-freedom (2-DOF) angular displacement signal is difficult to detect, seriously restricting its application in aviation optoelectronic pods. Therefore, this study proposes a new method to measure a spherical pair’s 2-DOF angular displacement using a spherical capacitive sensor. The capacitive sensor presented by this method realizes the measurement of the 2-DOF angular displacement of the spherical pair by integrating the spherical electrode groups in the ball head and the ball socket of the spherical pair. First, based on the geometric structure of the spherical pair, the structure of the capacitive sensor is designed, and the mathematical model for the capacitive sensor is deduced. Then, the sensor’s output capacitance, in different directions, is simulated by Ansoft Maxwell software. Finally, an experiment device is built for the measurement experiments. The simulation analysis and experimental results show that the spherical capacitive sensor has an approximately linear output in different directions, and the measured output capacitance is as high as <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>89.7</mn><mo>%</mo></mrow></semantics></math></inline-formula> of the theoretical value. Compared with the existing sensors that measure the 2-DOF angular displacement signal of the ball pair, the sensor proposed in this study has an integrated structure, which can be integrated into the spherical pair. That makes it possible to apply the spherical pair to the inner frame of the aviation optoelectronic pod. |
| first_indexed | 2024-03-10T03:41:29Z |
| format | Article |
| id | doaj.art-dc98a9b100994fb4982d35802c07460c |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T03:41:29Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-dc98a9b100994fb4982d35802c07460c2023-11-23T09:18:29ZengMDPI AGSensors1424-82202022-04-01229343710.3390/s22093437A Novel Method for Detecting the Two-Degrees-of-Freedom Angular Displacement of a Spherical Pair, Based on a Capacitive SensorShengqi Yang0Yulei Xu1Yongsen Xu2Tianxiang Ma3Hao Wang4Jinghua Hou5Dachuan Liu6Honghai Shen7Key Laboratory of Airborne Optical Imaging and Measurement, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaKey Laboratory of Airborne Optical Imaging and Measurement, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaKey Laboratory of Airborne Optical Imaging and Measurement, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaKey Laboratory of Airborne Optical Imaging and Measurement, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaKey Laboratory of Airborne Optical Imaging and Measurement, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaJiuquan Satellite Launch Centre, Jiuquan 732750, ChinaJiuquan Satellite Launch Centre, Jiuquan 732750, ChinaKey Laboratory of Airborne Optical Imaging and Measurement, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaThe spherical pair has an important role in the inner frame of the stabilization mechanism of the aviation optoelectronic pod. However, its two-degrees-of-freedom (2-DOF) angular displacement signal is difficult to detect, seriously restricting its application in aviation optoelectronic pods. Therefore, this study proposes a new method to measure a spherical pair’s 2-DOF angular displacement using a spherical capacitive sensor. The capacitive sensor presented by this method realizes the measurement of the 2-DOF angular displacement of the spherical pair by integrating the spherical electrode groups in the ball head and the ball socket of the spherical pair. First, based on the geometric structure of the spherical pair, the structure of the capacitive sensor is designed, and the mathematical model for the capacitive sensor is deduced. Then, the sensor’s output capacitance, in different directions, is simulated by Ansoft Maxwell software. Finally, an experiment device is built for the measurement experiments. The simulation analysis and experimental results show that the spherical capacitive sensor has an approximately linear output in different directions, and the measured output capacitance is as high as <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>89.7</mn><mo>%</mo></mrow></semantics></math></inline-formula> of the theoretical value. Compared with the existing sensors that measure the 2-DOF angular displacement signal of the ball pair, the sensor proposed in this study has an integrated structure, which can be integrated into the spherical pair. That makes it possible to apply the spherical pair to the inner frame of the aviation optoelectronic pod.https://www.mdpi.com/1424-8220/22/9/3437spherical motion paircapacitive angular sensor2-DOF angular displacement measurementfour-quadrant differential structure |
| spellingShingle | Shengqi Yang Yulei Xu Yongsen Xu Tianxiang Ma Hao Wang Jinghua Hou Dachuan Liu Honghai Shen A Novel Method for Detecting the Two-Degrees-of-Freedom Angular Displacement of a Spherical Pair, Based on a Capacitive Sensor Sensors spherical motion pair capacitive angular sensor 2-DOF angular displacement measurement four-quadrant differential structure |
| title | A Novel Method for Detecting the Two-Degrees-of-Freedom Angular Displacement of a Spherical Pair, Based on a Capacitive Sensor |
| title_full | A Novel Method for Detecting the Two-Degrees-of-Freedom Angular Displacement of a Spherical Pair, Based on a Capacitive Sensor |
| title_fullStr | A Novel Method for Detecting the Two-Degrees-of-Freedom Angular Displacement of a Spherical Pair, Based on a Capacitive Sensor |
| title_full_unstemmed | A Novel Method for Detecting the Two-Degrees-of-Freedom Angular Displacement of a Spherical Pair, Based on a Capacitive Sensor |
| title_short | A Novel Method for Detecting the Two-Degrees-of-Freedom Angular Displacement of a Spherical Pair, Based on a Capacitive Sensor |
| title_sort | novel method for detecting the two degrees of freedom angular displacement of a spherical pair based on a capacitive sensor |
| topic | spherical motion pair capacitive angular sensor 2-DOF angular displacement measurement four-quadrant differential structure |
| url | https://www.mdpi.com/1424-8220/22/9/3437 |
| work_keys_str_mv | AT shengqiyang anovelmethodfordetectingthetwodegreesoffreedomangulardisplacementofasphericalpairbasedonacapacitivesensor AT yuleixu anovelmethodfordetectingthetwodegreesoffreedomangulardisplacementofasphericalpairbasedonacapacitivesensor AT yongsenxu anovelmethodfordetectingthetwodegreesoffreedomangulardisplacementofasphericalpairbasedonacapacitivesensor AT tianxiangma anovelmethodfordetectingthetwodegreesoffreedomangulardisplacementofasphericalpairbasedonacapacitivesensor AT haowang anovelmethodfordetectingthetwodegreesoffreedomangulardisplacementofasphericalpairbasedonacapacitivesensor AT jinghuahou anovelmethodfordetectingthetwodegreesoffreedomangulardisplacementofasphericalpairbasedonacapacitivesensor AT dachuanliu anovelmethodfordetectingthetwodegreesoffreedomangulardisplacementofasphericalpairbasedonacapacitivesensor AT honghaishen anovelmethodfordetectingthetwodegreesoffreedomangulardisplacementofasphericalpairbasedonacapacitivesensor AT shengqiyang novelmethodfordetectingthetwodegreesoffreedomangulardisplacementofasphericalpairbasedonacapacitivesensor AT yuleixu novelmethodfordetectingthetwodegreesoffreedomangulardisplacementofasphericalpairbasedonacapacitivesensor AT yongsenxu novelmethodfordetectingthetwodegreesoffreedomangulardisplacementofasphericalpairbasedonacapacitivesensor AT tianxiangma novelmethodfordetectingthetwodegreesoffreedomangulardisplacementofasphericalpairbasedonacapacitivesensor AT haowang novelmethodfordetectingthetwodegreesoffreedomangulardisplacementofasphericalpairbasedonacapacitivesensor AT jinghuahou novelmethodfordetectingthetwodegreesoffreedomangulardisplacementofasphericalpairbasedonacapacitivesensor AT dachuanliu novelmethodfordetectingthetwodegreesoffreedomangulardisplacementofasphericalpairbasedonacapacitivesensor AT honghaishen novelmethodfordetectingthetwodegreesoffreedomangulardisplacementofasphericalpairbasedonacapacitivesensor |