排序方式： 共有16条查询结果，搜索用时 15 毫秒
1.
Ruangurai Piyanun Dailey Matthew N. Ekpanyapong Mongkol Soni Peeyush 《Precision Agriculture》2022,23(4):1205-1225
Precision Agriculture - With the rapid advances in precision agriculture technology, machine vision is emerging as a means to obtain accurate spatial information for a control system at relatively... 相似文献
2.
该研究旨在设计一种基于互联网的温室控制系统,以便实现远程监测和控制。所设计的系统包括硬件(传感器、单片机、交换机、电脑、网络摄像头和执行器)和软件(采集和控制)。通过将执行器(风机、泵、喷雾器、机械遮光装置和可旋转摄像头)安装在试验温室并且连接到计算机互联网上对系统性能进行测试。在水培生菜等整个生长期内对其微气候参数进行监测,在3种操作模式(手动、自动和定时)下,对温度、湿度、光照和含水率进行控制。利用开关对风机、泵和喷雾器进行控制以确保微气候参数能保持在所需范围内。机械遮阴和摄头旋转采用伺服电机驱动,由PWM信号驱动进行控制。对3种模式下系统的性能进行评价和比较。结果表明,对温度、湿度、光照和含水率4个参数可以通过互联网Remote Desktop完成远程控制。监控单元提供的植物生长图片可作为制定控制决策的附加信息。 相似文献
3.
Application of low altitude remote sensing (LARS) platform for monitoring crop growth and weed infestation in a soybean plantation 总被引：1，自引：0，他引：1
Grianggai Samseemoung Peeyush Soni Hemantha P. W. Jayasuriya Vilas M. Salokhe 《Precision Agriculture》2012,13(6):611-627
Crop growth and weed infestation in a soybean field were monitored by processing low altitude remote sensing (LARS) images taken from crane-mounted and unmanned radio controlled helicopter-mounted platforms. Images were taken for comparison between true color (R?CG?CB) and color-infrared (NIR) digital cameras acquired at different heights above ground. All LARS images were processed to estimate vegetation-indices for distinguishing stages of crop growth and estimating weed density. LARS images from the two platforms (low-dynamic and high-dynamic) were evaluated. It was found that crane-mounted RGBC and NIRC platforms resulted in better quality images at lower altitudes (<10?m). This makes the crane-mounted platform an attractive option in terms of specific low altitude applications at an inexpensive cost. Helicopter-mounted RGBH and NIRH images were found suitable at altitudes >10?m. Comparison of NDVIC and NDVIH images showed that NDVI values at 28 DAG (days after germination) exhibited a strong relationship with altitudes used to capture images (R 2 of 0.75 for NDVIC and 0.79 for NDVIH). However, high altitudes (>10?m) decreased NDVI values for both systems. Higher R 2 values (??0.7) were also obtained between indices estimated from crane-and helicopter-mounted images with those obtained using an on-ground spectrometer, which showed an adequate suitability of the proposed LARS platform systems for crop growth and weed infestation detection. Further, chlorophyll content was well correlated with the indices from these images with high R 2 values (>0.75) for 7, 14, 21 and 28 DAG. 相似文献
4.
5.
Different tillage systems (conventional, minimum, raised bed and no tillage) and four mulch levels (control, polythene, straw and soil) were compared in maize (Zea mays) and wheat (Triticum aestivum) production for three years on an experimental field (sandy loam) located at Dry Land Research Sub Station, Dhiansar, Jammu. Each treatment was replicated four times in split plot design. The aim of the research was to determine the influence of tillage and mulch practices on economics, energy requirement, soil physical properties and performance of maize and wheat. Tillage methods significantly affected the soil physical properties as change in soil moisture contents and infiltration rate of soil was recorded. The soil moisture contents in minimum tillage (MT) were maximum (12.4%, 16.6%) in surface soil as compared to conventional tillage (CT) in maize and wheat crops, respectively. Comparing to the CT infiltration rate was (1.16times, 1.21times and 1.11times) higher in minimum tillage (MT), no tillage (NT) and raised bed (RB), respectively in kharif season. Similar results were also found in rabi season. The greatest maize yield of 1865 kg ha?1 was achieved with CT system while not significantly lower yield was achieved with MT system (1837 kg ha?1). However, wheat yield was recorded higher in MT as compare to the CT system. Comparing to the energy requirement of different operations, MT required 34.3% less, NT 31.1% less and RB 46.0% less than the CT system. MT system saved 2.5 times energy in tillage operation compared to the CT system. The economic analysis also revealed that the maximum benefits could be obtained from MT (EUR 202.4 ha?1) followed by RB (EUR 164.2 ha?1) and NT (EUR 158.3 ha?1) and lowest in CT (EUR 149.5 ha?1). Benefit-cost ratio was highest in MT (0.71) and lowest in CT (0.44). Results revealed that mulch significantly affected the soil physical properties and growth of maize. The maximum soil moisture content, infiltration rate and grain yield of maize and wheat recorded higher in mulching practices over no mulch treatment. Polythene mulch and straw mulch were almost equally valuable in maize and wheat sequence. Tillage (minimum) and mulch (polythene and straw) have pronounced effect on soil physical properties (improved infiltration rate and conserve soil water), energy requirement, economics and growth of maize and wheat. 相似文献
6.
对标准型、缺口型和螺旋缺口型圆盘耙性能分别在室内3个装有沙壤土的土槽测试耕作圆盘的性能。实验室测试设置包括土槽系统和数据采集系统。双扩展八角形环（DEOR）传感器和滑环扭矩传感器,用于三维应力和扭矩测量。圆盘角和旋转速度是研究对象。对于所有型式的圆盘耙而言,使用外源动力驱动都可以减少土壤作用在耕作圆盘耙上的合力。形态各异的切割边缘显著影响耕作圆盘耙的受力和对土壤的切削作用。螺旋缺口圆盘耙表现出比缺口和标准圆盘耙低的土壤作用。螺旋切削刃提供剪切割行动,消除冲击载荷,提供流畅的操作。由于其能对作物残留物进行有效切割,因此,螺旋缺口圆盘耙是适合保护性耕作作业最具潜力的机具。 相似文献
7.
该研究旨在设计一种基于互联网的温室控制系统,以便实现远程监测和控制。所设计的系统包括硬件（传感器、单片机、交换机、电脑、网络摄像头和执行器）和软件（采集和控制）。通过将执行器（风机、泵、喷雾器、机械遮光装置和可旋转摄像头）安装在试验温室并且连接到计算机互联网上对系统性能进行测试。在水培生菜等整个生长期内对其微气候参数进行监测,在3种操作模式（手动、自动和定时）下,对温度、湿度、光照和含水率进行控制。利用开关对风机、泵和喷雾器进行控制以确保微气候参数能保持在所需范围内。机械遮阴和摄头旋转采用伺服电机驱动,由PWM信号驱动进行控制。对3种模式下系统的性能进行评价和比较。结果表明,对温度、湿度、光照和含水率4个参数可以通过互联网Remote Desktop完成远程控制。监控单元提供的植物生长图片可作为制定控制决策的附加信息。 相似文献
8.
Precision Agriculture - The farming activities in developing countries are mostly conducted in daytime with varying intensities of natural light throughout the day. Also, the shade trees can... 相似文献
9.
该研究以东爪哇地区爪哇和马都拉农民为研究对象,分别采集16～67岁（男性）和15～59岁（女性）人体测量学数据。研究数据包括58位测试者的身高、年龄和体质量3个指标,即相对坐高（RSH）、体表面积（BSA）和体质量指数（BMI）。描述统计包括平均值、标准误（SEM）、变异系数（CV）、标准差（SD）和身体尺寸区间百分数。该研究目的在于比较选定的爪哇和马都拉农民与泰国、印度和其他人种的身体尺寸。试验测定了321位农民的身体尺寸。爪哇的80位男性和85位女性以及马都拉部落的76位男性和80位女性农民参与了该项研究。结果表明,爪哇和马都拉男性人体特征差异显著（p＜0.05）,主要表现在身高、眼睛高度、肘部高度、指尖高度、指关节高度、手腕高度、臀部高度及肩高。调查还显示,爪哇男性和女性的BSA、BMI和握力的平均值均显著高于马都拉人（p＜0.05）。但是,爪哇和马都拉农民的RSH基本相似,BSA与体质量的比值相同。这就意味着,爪哇和马都拉农民男性身体数据平均值要低于印尼城市居民、印度人和泰国农民。相比于其他地区,爪哇女性农民体质量值最大。爪哇和马都拉男性农民BSA与体质量的比值等于或大于泰国、印度、加拿大、英国和阿尔及利亚地区样本。在印尼基于地理位置和种族的人体测量数据库有助于设计出适合当地应用的农业设备。 相似文献
10.
Bayu?Taruna?Widjaja Putra Peeyush?SoniEmail authorView author&#;s OrcID profile 《Precision Agriculture》2018,19(2):238-256
Direct-leaves measurement of spectral indices using a digital camera with a portable small chamber and custom illumination is used to take images of 600 leaves from 40 coffee plants. In this research, several vegetation indices (VIs) are developed and evaluated. Through a series of experiments, Chlorophyll a and b, Carotenoids, and Nitrogen critical level of Robusta coffee plants are analyzed and evaluated using selected VIs obtained from spectra of different tools like Spectrometer, digital camera, and SPAD-502 Chlorophyll meter. The actual Nitrogen critical level was determined using Kjeldahl laboratory test. Beside Hue, the newly proposed VIs could significantly improve the correlation in estimating photosynthetic pigments (Chlorophyll a and b, Carotenoids) and Nitrogen critical level of Robusta coffee plant. Finally, consumer-grade digital camera with custom chamber is shown to be used for rapid and accurate in situ estimation of Chlorophyll a and b, Carotenoids, and Nitrogen critical level of Robusta coffee plant from direct-leaves measurement. 相似文献