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采摘機(jī)器人深度視覺(jué)伺服手-眼協(xié)調(diào)規(guī)劃研究
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國(guó)家自然科學(xué)基金項(xiàng)目(31971795)、江蘇大學(xué)農(nóng)業(yè)裝備學(xué)部項(xiàng)目(4111680002),、江蘇省優(yōu)勢(shì)學(xué)科項(xiàng)目(PAPD-2018-87)和江蘇省研究生創(chuàng)新基金項(xiàng)目(CXZZ12_0693)


Hand-Eye Coordination Planning with Deep Visual Servo for Harvesting Robot
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    摘要:

    針對(duì)現(xiàn)有采摘機(jī)器人的識(shí)別-采摘精度與效率偏低等問(wèn)題,,開(kāi)展了采摘機(jī)器人深度視覺(jué)伺服手-眼協(xié)調(diào)規(guī)劃研究。開(kāi)發(fā)了在手RealSense深度伺服的小型升降式采摘機(jī)器人,,進(jìn)行了采放果的工作空間與姿態(tài)分析,,針對(duì)“眼在手上”模式建立了手-眼協(xié)調(diào)的坐標(biāo)變換模型。對(duì)采摘機(jī)器人提出了基于在手RealSense深度伺服的由遠(yuǎn)及近手眼協(xié)調(diào)策略,,并根據(jù)RealSense與機(jī)械臂參數(shù)完成了基于深度視覺(jué)的遠(yuǎn)近景協(xié)調(diào)關(guān)鍵點(diǎn)間分段動(dòng)作規(guī)劃,。手眼協(xié)調(diào)采摘試驗(yàn)表明,末端在X,、Y,、Z方向的平均定位精度為3.51、2.79,、3.35mm,,平均耗時(shí)為19.24s,其中機(jī)械臂從初始位開(kāi)始采果的平均耗時(shí)為12.04s,,中間識(shí)別與運(yùn)算的平均耗時(shí)為3.82s,,放果動(dòng)作平均耗時(shí)為7.2s,機(jī)械臂動(dòng)作耗時(shí)占整個(gè)環(huán)節(jié)的80.2%,。該機(jī)器人結(jié)構(gòu)和在手RealSense深度伺服的手眼協(xié)調(diào)策略可滿足采摘作業(yè)需求,。

    Abstract:

    Aiming at the low precision and efficiency of the fruit identification and harvesting motion of existing harvesting robots, the hand-eye coordination planning with deep visual servo for harvesting robot was carried out. A small lifting harvesting robot with deep visual servo of RealSense-in-hand was developed, which was composed of the autonomous vehicle, lifting bin, electric fork lifter, grip-cut integrated end-effector, and 3-freedom manipulator. The workspace and posture analysis of fruit picking and placing was performed, and the coordinate transformation model of hand-eye coordination was established for the eye-in-hand mode. Based on the depth visual servo of RealSense-in-hand, the far-to-close hand-eye coordination strategy was proposed for the harvesting robot. The canopy detection from a distance, sub-region division and location, close-range fruit accurate identification and positioning were effectively combined, so that the step-by-step visual guidance of the manipulator was realized. According to the parameters of RealSense and the manipulator, the segmented motion planning between far-to-close key points based on depth vision was completed. It was shown in the hand-eye coordinated harvesting test that, the average positioning accuracy of the end-effector in the X, Y and Z directions was 3.51mm, 2.79mm and 3.35mm, respectively. The average time consuming was 19.24s, which included the motion time of the manipulator from the initial position to picking position (12.04s), the fruit recognition and computing time (3.82s), and the fruit placing time (7.2s). The time of manipulator motion accounted for 80.2% of the whole cycle. Both the robot structure and the hand-eye coordination strategy based on depth visual servo of RealSense-in-hand can meet the needs of fruit harvesting operation.

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金玉成,高楊,劉繼展,胡春華,周堯,李萍萍.采摘機(jī)器人深度視覺(jué)伺服手-眼協(xié)調(diào)規(guī)劃研究[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2021,52(6):18-25. JIN Yucheng, GAO Yang, LIU Jizhan, HU Chunhua, ZHOU Yao, LI Pingping. Hand-Eye Coordination Planning with Deep Visual Servo for Harvesting Robot[J]. Transactions of the Chinese Society for Agricultural Machinery,2021,52(6):18-25.

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  • 收稿日期:2021-04-09
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  • 在線發(fā)布日期: 2021-06-10
  • 出版日期: 2021-06-10
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