基于51单片机的智能加湿器系统设计

基于51单片机,介绍了一种智能加湿器的软硬件设计及其制作。该系统操作方便,成本低,性价比高,并且可以自定义设置加湿器智能加湿的湿度值门限。设计的核心器件为STC89C52单片机,采用的编程方式为C语言编程,系统利用ADC0832把温湿度传感器DHT11输出的模拟电压信号转换为数字信号,然后单片机对该数字信号进行采集和处理,进而控制雾化模块运转,加湿器工作。该系统可以自动调节室内湿度,去除静电,大大改善了室内湿度适宜度,从而给人们创造一个健康的生活环境。     

基于单片机的温室灌溉双湿度控制系统设计

针对目前现代温室控制系统操作复杂、成本高昂等问题,设计了一款简单实用型温室灌溉双湿度控制系统。系统以单片机作为主控单元,采用SHT系列传感器采集湿度信号,通过电磁阀启闭实现水流控制。设计了双湿度控制策略,实现了土壤湿度和空气湿度双因素关联控制温室灌溉的功能。     

基于单片机和多传感器的微型风扇驱动系统

防霾口罩的微型风扇驱动系统为优化使用功能,采用STC12C5A60S2单片机作为控制器,由温度、湿度和声音传感器对周围环境进行采样。单片机对采样信号进行软件滤波等信号处理后,据此生成PWM控制信号,TC1508S双通道直流马达驱动器以该PWM信号作为输入实现对微型风扇转速的控制。该系统实现了防霾口罩通风状态随使用者呼吸需求而自适应调节的功能。     

基于SPCE061A的语音湿度测量仪的设计

文章以凌阳16位单片机SPCE061A为控制中心,配合凌阳LCD501液晶模组及电容式湿度传感器HS1101实现了湿度的测量。该湿度测量仪具有实时测量、液晶动态显示和语音播报湿度值功能,可以存储50组湿度值,且当湿度值过高或过低时有提示功能,利用按键控制湿度值的播放及存储。该设计主要创新是利用单片机实施控制,具有存储和语音播报功能。     

连续物料输送机单片机称重装置设计

连续物料输送装置采用称重传感器测量物料重量，并以单片机作为称重装置计算和控制的核心元件，对传感器送来的信号进行必要的分析、控制、处理、驱动显示，实现在线动态检测；采用软件方法对传感器信号进行一定的处理，减少电路设计难度和元件性能在温、湿度等变化时对电路的影响。     

一种基于AVR单片机的空气净化器控制系统

随着生活水平的提高,人们对自己日常生活和工作的室内空气环境质量的要求和期望也在不断提高.本文设计出一种新型的、利用紫外线杀菌消毒的空气净化器电路控制系统.该系统选择合适的ATmega128单片机,利用TGS800气体传感器与LHi878热释电红外传感器分别检测室内空气质量和移动人体红外信号,并将采集信号输出给单片机端口,单片机根据检测到的信号自动调整和控制空气净化器.该系统经过试运行和调试,效果明显,值得推广.     

基于单片机的直流电动机控制系统设计

系统设计采用高性能单片机构成直流电动机PWM调速系统,由单片机输出控制信号并通过专用芯片产生PWM波形来控制电动机转动与速度,其运行状态由反馈电路进行数据采集,并将采集信息反馈给单片机进行数据分析处理,并将当前的电动机运行状态显示出来.     

基于AVR单片机的精密温控系统设计

本文设计了一种基于Atmega16单片机的精密温控系统。该系统采用单片机为核心控制器。改进型智能温度传感器DS18820完成对温度信号的采集。并把采集的信号送入单片机进行处理。实时显示温度值,根据系统设定完成相应的智能控制。     

基于单片机的温室自动控制系统设计

温度、湿度和光照强度是影响作物生长的重要环境因素,该文设计开发以51单片机为控制器的光热湿感应温室自动控制系统,利用物联网的传感器技术对农作物种植环境的重要参数进行监测,单片机将数据进行分析处理,控制执行机构自动进行温度、湿度和光照度的调节,实现计算机自动控制。按需、按期和按量调节以达到系统所需参数,创建农作物最佳生长环境。该系统各参数可根据作物生长需求进行定值设定,具有很强的控制灵活性及应用广泛性。     

基于单片机的智能光电纠偏控制器的设计

根据光电纠偏的成本和精度的要求,设计了一种新型的基于单片机的光电纠偏控制器,控制器以红外发光二极管和光电三极管为传感元件,将传感信号读入单片机进行编码,与基准编码信号进行比较判断输出控制信号,控制功能主要由软件实现,该控制器还具有故障自检和报警等多种附加功能.     

仓库环境控制系统的设计

防潮、防霉、防腐、防爆是仓库日常工作的重要内容。本文介绍了一种以DHT11数字温湿度传感器、AT89S52单片机、315M无线收发模块为主的仓库温度湿度控制系统。本系统采用DH11数字温湿度传感器与AT89S52组成温度湿度实时采集系统进行实时的采集。随后将采集的数据通过单片机串口发送方式由315M无线收发模块将采集的数据传送至数据处理中心处理,根据预设的温度、湿度值决定是否驱动控制继电器驱动风机、加湿机、升温机工作,从而实现对温度、湿度的控制。     

Effect of environment humidity and temperature on stationary and transient flying responses of air bearing slider

It is well known that the environment humidity and temperature have a significant influence on the flying height of an air bearing slider. However, not many research papers address this topic, especially when the transient flying response is considered. This paper studies the influences of the environment humidity and temperature on both the stationary and transient flying responses of slider by simulation. A slider design for the thermal protrusion application is addressed. The reason for causing the drop of the air bearing pressure is discussed, and the methods for decreasing the drop are proposed. It is observed that the environment humidity and temperature may determine whether the slider is in full flying state or in partial flying/partial dragging state, when the slider is released from a certain height. The reason may be due to the high humidity and temperature which weakens the air bearing. As a result, the air bearing becomes not strong enough to support well the full flying of slider when the influence of the intermolecular force is significant. Slider vibrations for the full flying case and the partial flying/partial dragging case are analyzed in frequency domain, and the slider vibration frequencies are discussed. It shows that the environment temperature and humidity have significant effects on both the stationary and transient flying responses of the slider.     

水喷雾场瞬态蒸汽浓度分布研究

考虑到喷雾形成的雾场中,雾滴生存环境的湿度对雾滴的动力学特性、热特性与蒸发特性有着重要的影响,因此对雾场湿度的动态变化进行研究是一项关键的工作。综合考虑变化的蒸发源项与蒸汽扩散之间的相互作用,建立了一维瞬态的湿度控制方程;采用多分散系模型,分析了喷雾区域及其水蒸汽的扩散区域内相对湿度随时间、空间的变化规律;并讨论了雾滴与空气的相对速度、雾滴体积分数、平均粒径及环境相对湿度等因素对于雾场及扩散区域的相对湿度分布的影响。     

湿敏共聚物的制备及其敏感元件的电特性研究

利用接枝共聚反应合成了对湿度敏感的高分子材料,基于该共聚物制成的电阻式湿度传感器在全湿量程范围内,阻抗值变化了３个数量级,响应时间小于５ｓ。对元件的湿敏特性、电压特性,频率特性,温度特性以及交流特性进行了测试,对其敏感机理进行了分析。     

Effect of relative humidity on the unlubricated wear of metals

Experiments were carried out to investigate the effect of humidity on the wear behaviour of same metal combination, i.e. steel–steel and aluminium–aluminium. The sliding wear of steel was found to increase by nearly 1.5 orders of magnitude when the relative humidity (RH) of the surrounding air decreased from 80 to 28% RH. At low humidity, both delamination and adhesion wear occurred. At high humidity levels, both delamination and adhesion wear took place at a relative small scale and the frictional force was considerably lower than that obtained at lower humidity levels. It is proposed that the low wear occurring at high humidity levels is due to the inhibition of these wear mechanisms by the formation of interfacial layers, possibly iron hydroxide and ferri-oxide-hydrates, and the adsorption of water on the worn surface in addition to the normal atmospheric oxidation. Increasing the humidity from 28 to 80% RH increased the wear rate of aluminium by nearly half an order of magnitude. It is proposed that at higher humidity levels, water vapour adsorbs on both the freshly created surface and wear debris generated and therefore the wear debris egresses easily from the contact area without adhering to the parent surfaces. Lack of adhering wear debris exposed the worn surfaces to metal–metal interaction.     

Effect of humidity on the tribological behavior of carbon-carbon composites

The present work is a study of the effect of humidity on the tribological behavior of carbon-carbon composites, including two-dimensional PAN/pitch (designated TM), PAN/CVI (designated E), and pitch/resin/CVI (designated A) formulae. Results indicate that there exist close relationships among friction coefficient, wear rate, and worn surface morphology. Whenever a morphological transition has occurred, transitions in friction and wear also occur. Three different debris morphologies are identified. The smooth type I and type III debris films can lubricate, but not the powdery type II debris. The relative humidity level has a strong effect on the tribological behavior of all three composites. Low humidity and high sliding speed generally accelerate the occurrence of type I-to-type II transitions in friction, wear, and debris morphology, whereas high humidity and low speed enhance the formation of type III debris. At any humidity level, the type I morphology is always accompanied by low friction and wear. After the type I-to-type II transition, higher friction coefficient and wear rate are observed in the low humidity than in the high humidity. Under the present conditions, composite E appears to be the most sensitive to the humidity effect, while composite A appears the least sensitive.     

The influence of temperature and humidity on the sensitivity of torque transducers

This paper presents a study of the effect of temperature and relative humidity on the sensitivity and the characteristics of torque transducers such as residual zero torque, reversibility and creep. Temperature and humidity coefficients of the sensitivity take positive as well as negative values. Linear dependence is found between the influence of temperature/relative humidity and the applied load. For some torque transducers, under temperature change the sensitivity has a transient overshoot reaching up to 3 times the steady amplitude. Also there is a small effect of temperature/relative humidity on the transducer’s parameters such as residual zero torque, reversibility and creep. Equations are presented to predict the effect of temperature/relative humidity changes on the sensitivity of torque transducers.     

Effect of ambient humidity on the strength of the adhesion force of single yeast cell inside environmental-SEM

A novel method for measuring an adhesion force of single yeast cell is proposed based on a nanorobotic manipulation system inside an environmental scanning electron microscope (ESEM). The effect of ambient humidity on a single yeast cell adhesion force was studied. Ambient humidity was controlled by adjusting the chamber pressure and temperature inside the ESEM. It has been demonstrated that a thicker water film was formed at a higher humidity condition. The adhesion force between an atomic force microscopy (AFM) cantilever and a tungsten probe which later on known as a substrate was evaluated at various humidity conditions. A micro-puller was fabricated from an AFM cantilever by use of focused ion beam (FIB) etching. The adhesion force of a single yeast cell (W303) to the substrate was measured using the micro-puller at the three humidity conditions: 100%, 70%, and 40%. The results showed that the adhesion force between the single yeast cell and the substrate is much smaller at higher humidity condition. The yeast cells were still alive after being observed and manipulated inside ESEM based on the result obtained from the re-culturing of the single yeast cell. The results from this work would help us to understand the ESEM system better and its potential benefit to the single cell analysis research.     

湿度传感器在自动气象站中的应用

本文主要分析了国外湿度传感器结构原理、误差来源等,提出发展我国湿度敏感元件的必要条件。     

湿度传感器在自动气象站中的应用

本文主要分析了国外湿度传感器结构原理、误差来源等，提出发展我国湿度敏感元件的必要条件。