| 气力式油菜精量排种器田间漏播检测方法 |
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| 引用本文： | 李 明,丁幼春,廖庆喜.气力式油菜精量排种器田间漏播检测方法[J].农业工程学报,2010,26(13):27-31. |
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| 作者姓名： | 李 明 丁幼春 廖庆喜 |
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| 作者单位： | 华中农业大学工学院，武汉 430070;华中农业大学工学院，武汉 430070;华中农业大学工学院，武汉 430070 |
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| 基金项目： | 高等学校博士学科点专项科研基金资助项目（项目编号：20090146110016） |
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| 摘 要： | 针对气力式油菜精量排种器排种性能漏播检测的问题，提出了一种基于排种频率的检测方法。通过测频装置对不同转速、不同数量型孔堵塞的气力式排种器出口的排种频率测量试验，获得了不同转速下界定漏播严重程度的频率划分区域，即正常区、弱漏播区与严重漏播区。设计了田间漏播检测方法，即对排种器转速测量值经平滑滤波后通过插值运算得到界定漏播严重程度的频率阈值，对排种频率测量值经中值滤波后与频率阈值比较实现漏播严重程度的检测。在试验台上测试表明：排种频率法能有效实现漏播程度的检测，无漏播时检测准确率为100%，当量型孔堵塞8孔以上时判定为漏播的准确率为100%，能够有效地屏蔽因偶尔的漏播引发的频繁报警问题。
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| 关 键 词： | 农业机械，种子，检测器，油菜籽，排种器，漏播系数，频率法 |
| 收稿时间： | 6/5/2010 12:00:00 AM |
| 修稿时间： | 2010/8/29 0:00:00 |
Loss sowing detection in field of pneumatic precision metering device for rapeseed |
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| Li Ming,Ding Youchun and Liao Qingxi.Loss sowing detection in field of pneumatic precision metering device for rapeseed[J].Transactions of the Chinese Society of Agricultural Engineering,2010,26(13):27-31. |
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| Authors: | Li Ming Ding Youchun and Liao Qingxi |
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| Abstract: | Acoording to the problem of loss sowing detection of pneumatic rapeseed precision seeder, one detection method based on seeding frequency was put forward. Using frequency measuring equipment the seeding frequency at the outlet of pneumatic metering device was tested at different rotational speeds and different seeder hold blockages and through the frequency three areas, named loss less sowing area, loss sowing area and serious loss sowing area, have been defined to estimate the degree of loss sowing. The method of loss sowing detection in field has been designed. First through smoothness processing for the real-time measuring rotational speed of metering device and interpolation operation of the frequency threshold value which was used to estimate the deep of loss sowing could be obtained. Through comparison with the median filtering measuring frequency and the frequency threshold value, the depth of loss sowing can be estimated. The tests on test-bed indicate that the method based on seeding frequency can effectively detect the degree of loss sowing, and when there is no loss seeding, the accuracy rate can be achieved to 100 percent. While up 8 seeding holes are clogged, the condition of loss seeding could also be detected with the accuracy of 100 percent. The method also can avoid continually alarming problem aroused by occasional loss seeding. |
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| Keywords: | agricultural machinery seed detector rapeseed metering device loss sowing coefficient frequency method |
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