光电信号与收割机谷物产量数据转换模型的构建与验证
为了准确获取联合收割机作业过程中的谷物产量信息,自主研发了基于光电漫反射原理的联合收割机谷物产量计量系统.系统主要由传感器模块、数据采集模块、GPS模块和谷物产量计量显示终端组成.在研究了联合收割机田间工作状态和籽粒升运器刮板谷堆近似模拟形状的基础上,提出了分段式光电信号与收割机谷物产量数据转换模型.同时为了进一步消除收割机作业过程中产生的奇异点数据,提出了基于籽粒升运器转速的双阈值动态均值滤波的数据预处理方法.结果表明,采用该方法可以有效剔除奇异点数据,提高产量数据整体平滑度.田间试验结果表明,在考虑升运器转速条件下,该研究提出的分段式谷物产量数据转换模型动态验证误差小于3.50%,满足联合...
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| Published in | 农业工程学报 Vol. 33; no. z1; pp. 36 - 41 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
国家农业智能装备工程技术研究中心,北京 100097
2017
北京市农林科学院北京农业智能装备技术研究中心,北京 100097 昆明理工大学现代农业工程学院,昆明 650000 国家农业智能装备工程技术研究中心,北京 100097%北京市农林科学院北京农业智能装备技术研究中心,北京 100097 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1002-6819 |
| DOI | 10.11975/j.issn.1002-6819.2017.z1.006 |
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| Summary: | 为了准确获取联合收割机作业过程中的谷物产量信息,自主研发了基于光电漫反射原理的联合收割机谷物产量计量系统.系统主要由传感器模块、数据采集模块、GPS模块和谷物产量计量显示终端组成.在研究了联合收割机田间工作状态和籽粒升运器刮板谷堆近似模拟形状的基础上,提出了分段式光电信号与收割机谷物产量数据转换模型.同时为了进一步消除收割机作业过程中产生的奇异点数据,提出了基于籽粒升运器转速的双阈值动态均值滤波的数据预处理方法.结果表明,采用该方法可以有效剔除奇异点数据,提高产量数据整体平滑度.田间试验结果表明,在考虑升运器转速条件下,该研究提出的分段式谷物产量数据转换模型动态验证误差小于3.50%,满足联合收割机谷物产量计量的实际需要. |
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| Bibliography: | 11-2047/S grain;photoelectric devices;sensors;combine harvester;dual threshold filter;yield transformation model In order to obtain real time grain yield data information, a kind of grain yield monitor system based on photoelectric principle was developed. It was consisted of sensor module, data collection module, GPS module and grain yield calculation terminal. The optical reflectance type grain volume sensor was installed on one side of the combine elevator. When the grain was conveyed through the grain flow sensor, the scraper and grain would be block the light path, intermittently. As a result, a pulse width signal would be generated. And the pulse width signal was proportional to the thickness of scraper and grain volume. Other sensors signals such as elevator speed sensor signal and GPS signal would also be generated at the same time. After the data collection module, all the signals would be transmitted to the liquid crystal display (LCD) terminal by RS485 bus. The grain volume monitor software could dis |
| ISSN: | 1002-6819 |
| DOI: | 10.11975/j.issn.1002-6819.2017.z1.006 |