CAJ | 학술논문

土地平整可以提高灌溉水的利用率，是农田节水增产的重要措施之一。为此，采用上位机决策和下位机控制相结合的方法（上位机系统以车载计算机为工作平台，采用高精度 GPS 接收机获取农田三维地形位置数据），提出了高程测量数据误差修正算法，用来校正平地作业过程中GPS动态测量误差；利用校正后数据，计算平地基准高程，输出位置高低判断信号。下位机系统以控制器为核心，接收位置高低判断信号，输出液压控制信号驱动平地铲升降，完成平地作业。平地试验表明，误差矫正后的农田三维地形分布图精度较高，测量效率比传统人工定点测量方法提高75％以上；土地平整效果较好，平地精度达到7．8cm，可满足高标准农田田面平整度要求。
토지평정가이제고관개수적이용솔，시농전절수증산적중요조시지일。위차，채용상위궤결책화하위궤공제상결합적방법（상위궤계통이차재계산궤위공작평태，채용고정도 GPS 접수궤획취농전삼유지형위치수거），제출료고정측량수거오차수정산법，용래교정평지작업과정중GPS동태측량오차；이용교정후수거，계산평지기준고정，수출위치고저판단신호。하위궤계통이공제기위핵심，접수위치고저판단신호，수출액압공제신호구동평지산승강，완성평지작업。평지시험표명，오차교정후적농전삼유지형분포도정도교고，측량효솔비전통인공정점측량방법제고75％이상；토지평정효과교호，평지정도체도7．8cm，가만족고표준농전전면평정도요구。
The GPS-controlled land leveling technology can achieve high-precision agricultural land leveling and im-prove the field topographic condition .Therefore , the irrigation efficiency and irrigation uniformity can be increased at a large scale under surface irrigation condition , resulting in water saving and yield increasing .This research combines the upper-computer decision-making and the lower-computer control .An on-board PC was used as the working platform of the upper computer system , working for getting horizontal coordinate and altitude information from high-precision GPS re-ceiver, revising the measurement error caused by the tilt of GPS antenna ,calculating the ground reference elevation , and output the digital judgment signals .The lower computer system used a controller to output the control signals to the hy -draulic system according to the digital judgment signals and complete the land-leveling work .The results of the field ex-periments showed that the system worked steadily and stably .The measuring efficiency was increased by more than 75%, compared with traditional artificial fixed-point measurement.The land leveling accuracy reached 7.8cm, which had met the flatness requirements of the construction standards of high-standard farmland issued by the ministry of agriculture .