电力直流电源产品老化监控系统的设计与实现

以ATmega64芯片为电路核心,设计了电力直流电源产品老化监控系统．该系统开发平台利用工业平板电脑作为主控机,采用功能单元模块化结构,通过RS845接口总线控制数据采集和各功能单元驱动,实现对老化产品各种参数的采集及监控．实际应用证明,该系统具备控制效果好、可靠性高、控制灵活等优点．     

基于ATmega16的远程蔬果大棚温湿度控制器

随着经济的快速发展,人民消费水平的不断提高,对反季节蔬菜、水果需求的增加,设施农业也快速兴起。大棚蔬果生长环境的控制是设施农业发展中不可缺少的。远程大棚温湿度控制仪器是一种基于ATmega16芯片控制的温湿度环境调节设备。本机采用ATMEL公司的ATmega16作为控制芯片,控制无线收发模块连接用户手机端,提示当前环境数值,并能通过手机端远程控制仪器调整环境参数。利用DS18B20温湿度传感器采集温湿度,通过TM1629控制十六位八段数码管显示,设计4路继电器输出,控制调节环境参数设备,q2403a无线收发模块通过无线信号与手机端联系。     

基于ATmega 64的智能核桃烘干控制器设计

基于ATmega 64的智能核桃烘干控制器是一种采用电加热,智能化控制的核桃烘干控制设备。本机采用ATmega 64作为控制芯片实现自动恒温控制,利用DS18B20温湿度传感器采集室内温湿度,FG32024027T-VJA触摸式液晶屏显示信息及设置控制器。     

利用单片机开发的纺机专用控制器在剑杆织机上的应用

利用单片机来开发纺机专用控制器作为剑杆织机的主控系统,介绍该控制器的硬件组成和软件程序的实施框架,是利用ATmega16单片机芯片构建开发系统的一个具体应用实例.     

利用单片机开发的纺机专用控制器在剑杆织机上的应用

介绍利用单片机来开发纺机专用控制器作为剑杆织机的主控系统，以及该控制器的硬件组成和软件程序的实施框架，是利用ATmega16单片机芯片构建开发系统的一个具体应用实例。     

STM32芯片在水泵综合参数测量中的应用

使用8位、16位单片机的传统水泵参数测量方法存在精度不够高,并行处理能力弱的问题,而基于DSP芯片的设计成本较高,不易推广。提出一种基于STM32芯片的水泵综合参数测量和数据传输方案,给出了各模块的硬件设计方案和软件处理流程。满足系统高性能的要求,并且实时处理能力强,功耗低,RS485接口和RS232接口方便用户使用,具有较高的应用价值。     

基于单片机的地暖控制器的设计

本文设计了一种基于单片机控制的地暖控制器,该控制器以ATmega16为核心,通过温度检测模块和流量监测模块来检测温度、水量,精确的控制温度、功率,水的流量,从而解决当前家庭对地暖的需求。     

基于CP2200的串口转以太网系统的设计

工业领域中控制设备使用的串口通信抗干扰性不强,而以太网通信具有更好的抗干扰性,并且控制设备和以太网具有联网的趋势。提出了一种以高性能微处理器（C8051F120）和以太网控制芯片（CP2200）为核心的转换系统,把从串口（RS232或RS485）中接收到的数据,通过以太网进行传输,提高了传输数据的抗干扰性,节省了更新换代成本,达到了远程监控、远程通信的目的。     

CS1180在自动称量装袋机中的应用

介绍了AD转换芯片CS1180在自动称量装袋机中的应用,包括整个设备的简单介绍、CS1180的参数、硬件电路以及软件编程.详细描述CS1180在整个系统中的功能及实现过程,包括实际使用时应注意的问题,对更好地使用该芯片制造其他设备提供一些参考.     

基于AVR16单片机控制的停车场管理系统

设计了一款基于AVR16单片机为控制中心的新型停车场管理系统,采用多片AVR单片机ATmega16作为从机采集磁阻传感器检测到的停车位信息,利用一片ATmega16单片机作为主机接收从机传送的数据.系统处理完数据后由显示器显示停车场的停车位信息。通过实验证明,该系统具备了自动开启大门功能、停车位实时显示功能、查询功能和打印功能,而且收费方式可以调节,使系统更具灵活性。整个系统操作简单、价格低廉、安装调试方便。能够满足管理停车场的要求。     

HR-I电子提花机控制器的设计

针对如何快速地改变花形,废除纹板,减少资金和材料浪费等问题,在研究和分析国内外电子提花技术的基础上,提出一种低成本的电子提花控制技术方案,以代替机械提花机。以单片机ATmega128为核心,利用CAN总线传输提花数据,实现数据远距离的传输,利用ATmega16接收CAN总线上的数据,在中断信号作用下通过同步串行口把数据分发到各个组件上,信号经过功率放大,驱动电磁阀,用提针控制经纱沉浮。该系统经现场测试,可实现无差错数据传输,可靠性好,抗干扰性强,能方便地改变花形,满足织造要求,从而提高生产效率。     

基于普通示波器的频谱分析装置设计

设计了一种为普通示波器加装频谱分析功能的装置,该装置以DSP芯片TMS320F206为核心,对信号滤波后,经A/D,FFT运算后得到频谱数据,再经D/A转换为模拟信号,由示波器显示出信号的频谱结构,操作简单,易于实现.     

大幅面喷墨印刷机主控电路设计

喷墨印刷机是一种由多组压电喷头喷墨的快速印刷设备,具有承印物丰富、质感好等特点.为达到数字印刷机所要求的高速连续数据传输并节约成本的目的,采用高速USB2.0接口,使用较大FIFO,并采用了模块化设计,对喷头控制状态机进行了精心设计,不但实现了喷墨印刷机的基本控制要求,而且具有良好的扩展性和经济性.     

一种语音控制车库门的实现方法

利用凌阳16位单片机SPCE061A非常适合处理数字语音信号的特点,实现基于SPCE061A的语音控制车库门系统,分析了系统组成及软件实现方法.该系统可通过语音控制命令实现车库门的开启与关闭,同时具有语音密码和密码可修改功能.     

基于FDM技术的3D糖画文创产品打印机设计

基于FDM技术设计包括机械机构、控制系统和HMI界面的3D立体糖画打印机。机械机构包括既可以精确送料又可以搅拌原料的给料搅拌机构和Core XY轴联动机构;控制系统以CPU1214C为核心,完成系统运动控制、温度控制和搅拌给料控制;HMI界面由SIEMENS OP73/Micro触摸屏安装WinCC Flexible为开发平台,实现人机交互。该设备结构简单、操作方便,能够打印出结构复杂、有"颜"有味的3D立体糖画。     

基于ATmega8和IR2110的PWM变频电源

设计了一款基于ATmega8和IR2110的RWM变频电源.系统通过特定的PWM控制MOSFET开关,使逆变器驱动电机运行,将直流电压转化为三相交流电压,再经过LC电流型滤波电路滤波,输出较理想的可调频的正弦电压,实现了变频电源的全数字化控制.     

Feasibility analysis of a newly developed multifunctional mastication simulator

Food oral mastication is a highly complicated dynamic process which involves multiple sequential or simultaneous operations. Ethical complication and technical difficulties for oral access make in situ studies of food oral processing highly challenging and, therefore, feasible instrumental techniques are highly desirable in order to be able to conduct food oral processing research in vitro instead. In this work, a newly developed mastication simulator equipped with 3D printed teeth, controlling units, and various probes have been developed. The device is capable of simulating chewing actions by using two step motors controlling transverse and longitudinal movements. The mastication units sits inside an airtight and properly temperature controlled chamber made of aluminum alloy. The chamber has various small ports to allow the addition of artificial saliva and access of probes monitoring of the temperature, conductivity and pH of the collected saliva. Fractured food particles can be collected for size distribution analysis and to quantify the kinetics of food mastication. Conductivity and pH of the collected fluid (artificial saliva + food juice) can be measured as a function of mastication time or chewing cycles. Air inside the chamber can be collected regularly for composition analysis so that the kinetics of aroma release of a food can be monitored during mastication. Nuts and food gels have been used for feasibility tests of the device. Results demonstrate that the current design provides a feasible tool for in vitro oral mastication analysis during food oral processing.     

Design and development of microcontroller based instrumentation for studying complex bioelectrical impedance of fruits using electrical impedance spectroscopy

Electrical impedance spectroscopy (EIS) is an electrical impedance technique to characterize the fruits and vegetables in terms of their frequency dependent bioimpedance profile. Standalone, portable, and low‐cost instrumentation is always preferred for conducting EIS procedures. This article reports the studies on the design and development of a Microcontroller based portable impedance measurement system to conduct the EIS studies on the fruits during ripening and storage. The proposed laboratory based EIS system is developed with a Microcontroller ATmega16, a Direct Digital Synthesizers based constant current source AD5930, a current to voltage converter, a low pass filter, and a DSO. To test and evaluate the developed system, the cucumber impedance is studied under the storage condition using EIS to characterize the cucumber freshness from the electrical impedance data. The real parts, imaginary parts of the cucumber impedance are calculated and the Nyquist diagrams are analyzed to study the equivalent circuit analysis. The developed system is compared with a standard impedance analyzer and it is observed that the results obtained from the developed system closely match with the data measured by the commercial impedance analyzer. The developed system is also found suitable for EIS studies of fruits, vegetables, and other biological tissues. The developed system is found low‐cost, fast, and user friendly. PCB based version of the proposed system with display unit will be found as a portable, standalone, and EIS system suitable for outdoor measurement in agricultural‐field applications.

Practical applications

Microcontroller based low cost electrical impedance spectroscopy (EIS) has been developed and is studied for EIS based fruit ripening analysis. The system is compared with the standard commercial impedance analyzer and it is found suitable fruit ripening characterization, vegetable freshness detection, and health studies of other biological tissues. The microcontroller based EIS system is found portable, low cost, fast, and user friendly device which can be used in laboratory, cultivation fields, cold storages and shops and markets. The developed system allows nontechnical person to operated and collect the data from fruit and vegetable samples. The system acquired data significantly correlate the bioimpedance variation with the ripening states which can be potentially utilized to study the fruit ripening noninvasively at low cost. Hence the product‐form of the developed devise could even be operated by field persons, farmers, and other common men to evaluate the fruit ripening and vegetable freshness.     

超小型PLC数字逻辑程序设计方法的应用

介绍超小型可编程控制器 (PLC)在循环冷却水系统应用中数字逻辑的程序设计方法。用安装于水池下部的压力传感器间接检测出水位信号 ,将此连续变化的水位信号通过施密特触发器变换为高水位和低水位信号(高低电平 ) ,然后送到PLC系统去控制水泵的运转。通过对回水阀和补水阀的控制 ,可实现对水温的调节。     

Non-invasive detection of fatty liver in dairy cows by digital analyses of hepatic ultrasonograms

During early lactation, many dairy cows develop fatty liver, which is associated with decreased health and reproductive performance. Currently, fatty liver can be detected reliably only by using liver biopsy followed by chemical or histological analysis, which is not practical in most on-farm situations. We tested whether digital analyses of hepatic ultrasonograms can be used to detect non-invasively fatty liver and estimate liver triacylglycerol content. A total of 49 liver biopsies and ultrasonograms were taken from 29 dairy cows within 2 weeks postpartum. The usefulness of 17 first- or second-order parameters from digital analysis of B-mode ultrasonograms were evaluated by discriminant, correlation, and regression analyses. A group of linear combinations of the 17 parameters correctly classified 40 of 49 samples into normal liver as well as mild, moderate and severe fatty liver when cut-off values were 1%, 5% and 10% and correctly classified 45 of 49 samples when cut-off values were 5% and 10% triacylglycerol of wet weight. A linear combination of 16 image parameters estimated triacylglycerol concentrations of 38 of the 39 liver samples below the cut-off value of 10% within 2.5% of liver wet weight, and a linear combination of 3 parameters estimated triacylglycerol concentrations of the 10 liver samples above the cut-off value of 10% within 2% of liver wet weight. Therefore, ultrasound imaging followed by digital analysis of sonograms has potential to non-invasively detect fatty liver and estimate liver triacylglycerol content.