灌溉水柱冲击种沟土壤压强信号的采集与处理方法

Method of Sampling and Processing of the Impinging Pressure Signals of Irrigating Water Column to Seedbed Furrow Soil

灌溉播种机在进行田间灌溉作业时存在灌溉水飞溅及冲种出穴的现象,导致作物的株距、播深不稳定,影响灌水播种质量及作物生长.提出了利用计算机与测力传感器直接测量灌溉水柱冲击压强的数值信号,并对信号采集过程中采样频率、采样时间的确定及信号在时域、频域内的相关分析方法进行研究,以期了解灌溉水柱冲击土壤压强的相关统计特性,并用于指导机具设计.

Irrigating water spattered out of seedbed furrow and the seed mowement is random when the machines of self-propelled water-saving irrigation and sowing were working. This is disadvantagous because, to solve this problem, the water power characteristics of irrigation impinging water column must be studied, particularly for the impinging pressure characteristics of impinging water column. Therefor, a testing device system was brought forword to collect impinging pressure signal by computer in this paper. The process of signal processing and signal collecting , and the analytic methods to the signal in timedomain and frequency-domain was studied.