排序方式: 共有108条查询结果,搜索用时 15 毫秒
1.
文章介绍了以ATmega8单片机作为核心控制芯片,采用PWM控制方式,应用PID控制算法,通过直流电机驱动芯片LM298和霍尔传感器实现的速度反馈闭环控制系统,给出了硬件电路和相应的软件设计. 相似文献
2.
3.
4.
5.
In the southern United States, corn production encounters moisture deficit coupled with high‐temperature stress, particularly during the reproductive stage of the plant. In evaluating plants for environmental stress tolerance, it is important to monitor changes in their physical environment under natural conditions, especially when there are multiple stress factors, and integrate this information with their physiological responses. A low‐cost microcontroller‐based monitoring system was developed to automate measurement of canopy, soil and air temperatures, and soil moisture status in field plots. The purpose of this study was to examine how this system, in combination with physiological measurements, could assist in detecting differences among corn genotypes in response to moisture deficit and heat stress. Three commercial hybrids and two inbred germplasm lines were grown in the field under irrigated and non‐irrigated conditions. Leaf water potential, photosynthetic pigments, cell membrane thermostability (CMT) and maximum quantum efficiency of photosystem II (Fv/Fm) were determined on these genotypes under field and greenhouse conditions. Variations observed in air and soil temperatures, and soil moisture in plots of the individual corn genotypes helped explain their differences in canopy temperature (CT), and these variations were reflected in the physiological responses. One of the commercial hybrids, having the lowest CT and the highest CMT, was the most tolerant among the genotypes under moisture deficit and heat stress conditions. These results demonstrated that the low‐cost microcontroller‐based monitoring system, in combination with physiological measurements, was effective in evaluating corn genotypes for drought and heat stress tolerance. 相似文献
6.
7.
文章主要介绍以dsPIC30F5011单片机在风机监控分站中的应用。风机监控分站对风机监控系统中各个设备的运行状态进行实时在线监控,确保风机正常运行。 相似文献
8.
9.
10.
基于单片机的数字化粮仓测控系统的研究 总被引:3,自引:0,他引:3
在粮食实际储藏过程中,为了给粮食提供较好的保存环境,需要对粮仓的环境参数进行实时监测。为此,本研究设计了以单片机为核心的粮仓环境智能测控系统,此系统充分利用了单片机的数据处理及实时监测能力,实现了粮仓环境参数的智能检测;测控系统中,上位机实现串行通讯和数据存储与显示等功能,下位机实现粮仓温度,湿度等环境参数的采集。 相似文献