共查询到19条相似文献，搜索用时 218 毫秒
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利用热电阻测量CPU温度,经过MC642处理后,输出相对应的PWM波,控制由小型直流电机带动的风扇转速,从而控制CPU温度,并经单片机测试后利用液晶显示器显示温度值和风扇转速,该测控系统具有风扇工作可靠,功耗和噪声低的特点,并能延长风扇的使用寿命. 相似文献
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《科技广场》2017,(10)
本文设计了一种基于STC89C51为主控芯片的智能温控风扇。该风扇系统使用数字温度传感器DS18B20检测温度,通过LCD12864显示温度值,BTS7960作为驱动模块驱动风扇转动。系统启动后自动检测外界温度,把温度数据发送到单片机中,再反馈给BTS7960驱动电路,自动调节风扇转速。为使实验结果更加明显,本设计采用24V、20W的风扇。软件用Altium Designer进行线路设计仿真和测试每一个模块,记录结果,并与实物接线后的运行结果进行比较。系统初始稳定范围值为温度28℃~35℃,风扇的转速成线性增大,当到达最高温度时,电压稳定输出24V,风扇功率达到20W;当环境温度下降时,风扇转速也随之线性下降,温度低于范围值时风扇将停止转动。 相似文献
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在对发动机冷却系统和CAN总线技术研究的基础上,提出了一种基于CAN总线的汽车发动机智能冷却系统的设计方案,并论述了其软硬件实现方法。系统以电动冷却风扇为基础,采用温度传感器获取汽车发动机冷却液温度信息,并依托CAN总线技术进行各节点间通信,分析表明系统具有很好的实时性和可扩展性。 相似文献
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《黑龙江科技信息》2020,(28)
本文主要讲述由STC89C51单片机控制的智能红外遥控电风扇。该系统使用红外遥控器来远程调控温度阈值,并根据温度大小来自动调速,不仅对人们的生活带来便利,还具有环保功能。该设计主要由LCD显示屏、红外模块、温度传感器、单片机和人体感应模块构成。单片机为该系统的控制核心,该系统通过18b20温度传感器来感应温度,通过红外遥控或按键对温度范围进行设置,通过人体感应模块来判断是否有人存在,单片机把温度信息和人体感知在LED液晶显示屏上显示。系统通过感应温度的上下值设定的范围,可以自动根据所感受的温度对风扇旋转速度来进行控制调节,在自动控制下,检测到无人存在时会倒数30秒自动关闭,既智能、操作方便,又具有节能特点。 相似文献
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基于AT89S52单片机的数字温度控制系统软件设计 总被引：1，自引：0，他引：1
随着科技的不断进步,在工业生产中温度是常用的被控参数,而采用单片机来对这些被控参数进行控制已成为当今的主流。基于单片机设计了数字温度测量及自动控制系统。系统由三个模块组成:温度采集模块、温度控制模块以及温度显示模块。其中温度采集模块是应用数字化温度传感DS18B20进行实时测温。温度控制模块是将程序写入AT89S52单片机中。温度显示模块是应用HD7279A同时驱动8位共阴式数码管显示温度值,并在温度高于预置值时,以闪烁的形式表示报警。系统的软件设计全部采用汇编语言编写。 相似文献
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In this paper, within the framework of ordinary differential equation and eutrophication ecological theory, long-run sustainability of an impulsive switched eutrophication controlling system based upon the Zeya reservoir is studied analytically and numerically. A key advantage of the impulsive switched eutrophication controlling system is that it can be quite accurate to better describe the influence mechanism of some key factors during eutrophication controlling process, which enables a systematic and logical procedure for fitting eutrophication system to real monitoring data. Mathematical theoretical works have been pursuing the investigation of some conditions for all species persistence, which can deduce a standard parameter control relationship and in turn can provide a theoretical basis for the numerical simulation. Numerical analysis indicates that the theoretical results are correct and the long-run substainability of the impulsive switched eutrophication controlling system mainly depends on some critical parameters. It should also be stressed that the values of some critical parameter can be determined by a standard parameter control relationship. In addition, it is successful to show that the standard parameter control relationship maybe be used as an explicit threshold function to judge the long-run sustainability of eutrophication controlling process for the Zeya reservoir. Finally, all these results are expected to be of use in the study of the dynamic complexity of eutrophication ecosystems. 相似文献
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本文介绍了河北钢铁集团唐钢热轧1700mm生产线中加热炉装钢机系统的设备构成,控制方式,运行顺序,参数计算等。整套控制系统结构简单,成本低廉,抗干扰性好,便于调试。 相似文献
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该软件是温室温度监测系统中的一部分,它接收由现场测温节点上传的数据,并将其处理后进行显示与存储,为管理人员提供温度监测信息。采用了先进ADO数据库引擎技术。该系统设计了实时监测模块、历史查询模块、参数设置模块等,实现了实时温度数据的表格显示、图形化显示以及历史数据的查询显示,同时能对下位机节点数等参数进行配置,实现温室温度监测的基本功能。 相似文献
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针对PID控制器在不同的应用系统,需要动态调整PID控制参数的问题,提出了基于遗传算法的PID自适应参数优化方案。该方案通过将PID控制器产生的误差作为目标函数,利用遗传算法实现对PID控制器参数的自动调整。为了提高参数的优化效率,文章通过对交叉算子和变异算子的自适应处理,提高了PID控制器的性能。实验测试表明,文章设计的PID参数优化策略比普通的基于遗传算法优化策略效率平均高14.7%。 相似文献
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High level oil temperature is one of the most important factories reasons for hydraulic system to breakdown.In order to improve ability of heat-radiation and control oil temperature within proper scope,new type oil tanks are required which are made up by plate-fin units.The analysis indicates that the new type oil tanks have a good natural ability of heat-radiation.To further enhance ability of heat-radiation,it should be fixed a fan in the bottom of the oil tanks,which can strengthen the ability of heat-radiation.With monitoring equipment,monitoring system can monitor the parameters of oil tanks in real time,and control the oil temperature within proper scope.Simulation experiments tell us some significant data. 相似文献
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Xiaonan Dong Chengzhi Yuan Paolo Stegagno Wei Zeng Cong Wang 《Journal of The Franklin Institute》2019,356(10):5049-5072
This paper studies the problem of composite synchronization and learning of multiple coordinated robot manipulators subject to heterogeneous nonlinear uncertain dynamics under the leader-follower framework. A new two-layer distributed adaptive learning control scheme is proposed, which consists of the first-layer distributed cooperative estimator and the second-layer decentralized deterministic learning controller. The first layer aims to enable each robotic agent to estimate the leader’s information. The second layer is responsible for not only controlling each individual robotic agent to track over desired reference trajectory, but also accurately identifying/learning each robot’s nonlinear uncertain dynamics. Design and implementation of this two-layer distributed controller can be carried out in a fully-distributed manner, which do not require any global information including global connectivity of the communication network. The Lyapunov method is applied to rigorously analyze stability and parameter convergence of the resulting closed-loop system. Numerical simulations on a team of two-degree-of-freedom robot manipulators have been conducted to demonstrate the effectiveness of the proposed results. 相似文献
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原毓 《科技成果管理与研究》2010,(4):66-67,71
文章介绍了一种实用的自动加热控制系统,采用低功耗,低成本的单片机ATMEGA48作为主控芯片,基于铂电阻的电阻率会随温度的变化而变化的测温原理进行测温,主控芯片根据实时测出的温度自动的控制加热棒的通断,从而使被加热的物体加热到预设的温度。 相似文献