基于FF总线848T变送器在反应器温度监控中应用

探讨了基于FF H1总线系统结构的848T温度变送器在反应器温度监控中的应用可行性及其实现方案.     

视频采集系统软件设计

该文介绍了Bt848卡的主要结构和工作原理,并详细描述了集成到可以实现上网和多媒体通信双重功能的IS-DN卡上的Bt848芯片驱动程序的实现,包括分配DMA内存区,分配视频缓冲区,以及视频数据在芯片和PC机内存之间的流动过程,并给出了具体的实现方法。     

ADuc812控制下的车辆发动机扭矩无线测试仪

该系统利用数据采集芯片ADue812和无线数字通信技术．实现了发动机实验台扭矩的无线监测,用非传统发动机扭矩测量实验方法来进行发动机台架实验,对于更好地研究发动机性能提供了有效的工具。     

基于单片机同步发电机转子温度监控系统的设计

采集发电机转子的电压和电流值,通过数据分析和计算输出发电机的转子温度值,是同步发电机转子间接测温的基本原理.介绍一种基于ADuc814单片机的同步发电机转子温度在线监测装置的总体结构、设计思想和关键技术.该装置对发电机转子运行状态在线监测具有重要作用.模拟实验表明,该装置运行安全可靠,此设备操作简单、界面友好、性能优良.     

基于ADuc812 单片机的数控调谐YIG 激励器

为使YIG滤波器提供稳定、可靠的激励电流,利用DA转换芯片将数字信号转换为模拟电压信号,控制恒流源电路产生YIG滤波器的激励电流信号,基于ADuc812单片机设计一种通过控制输出电流调谐YIG小球的共振频率的YIG激励器。同时采用12位并行接口通讯,采用硬件和软件相结合的补偿方式进行温度补偿,使用ADuc812芯片中EEPROM作为补偿数据存储器。结果表明:该设计系统运行稳定可靠,目前已经成功应用于某工程项目中,取得了较好的经济效益。     

用ADuc834实现可手持的高准确度温度测量

本文通过一种高准确度的温度计的设计来探讨ADuc834在气象产品设计中应用的可能性,对设计中需要注意的问题介绍了自身的经验。     

Alkaline semen diluent combined with R848 for separation and enrichment of dairy goat X-sperm

A large number of female goats are needed for the dairy goat industry; therefore, the development of a method to ensure the birth of more females than males in a single pregnancy will lead to economic benefits. Increasing the number of X-sperm would be an effective way to increase the proportion of female offspring. In this study, goat semen was incubated at pH 7.4 in alkaline diluent combined with resiquimod (R848) and the number of X-sperm was enriched by the swim-up method. The percentage of X-sperm was determined using the double TaqMan qPCR method. Sperm total motility, progressive motility, average path velocity, straight-line velocity, and curvilinear velocity were measured using a computer-aided sperm analysis system, and the functional parameters of the sperm plasma membrane, the acrosome, mitochondrial activity, ATP content, and reactive oxygen species levels were also measured. Lastly, the ratio of female embryos was determined by in vitro fertilization, and the number of female kids and the pregnancy rate of does was assessed by artificial insemination. The results showed that dilution of semen in an alkaline buffer containing R848 could enrich the number of X-sperm to 85.57% ± 3.27%. The progressive motility, average path velocity, straight-line velocity, curvilinear velocity, mitochondrial activity, and ATP level of the collected X-sperm-enriched semen were significantly reduced, but its total motility, plasma membrane, and acrosome were not affected. The in vitro fertilization experiments showed that the rate of female embryo production using X-sperm-rich seminal fluid could reach 83.25% (174/209), which was significantly higher than the proportion of female embryos in the control group, 47.71% ± 1.80% (104/218). As determined by artificial insemination, the number of female kids in the test group increased by 62.79% (243/387), which was significantly higher than that in the control group (47.65%, 193/405). There was no significant difference in pregnancy rate between the test group and the control group (71.71% vs. 78.48%). Therefore, this study demonstrated that use of a pH 7.4 diluent containing R848 is a simple and effective method of X-sperm enrichment for dairy goat production. Its application would allow does to produce more female offspring for herd expansion and milk production.     

基于MAX1641的光伏智能快速充电系统设计

在光伏应用系统中,分段恒流是实现蓄电池高效、快速充电的一种有效方法。本文根据蓄电池的饱和程度采用不同大小的充电电流原理,以充电效率高达95%和带工作模式可调的新型DC-DC变换器件MAX1641为核心,设计了一种光伏智能快速充电方案。文中重点介绍了带工作模式选择的智能DC-DC变换器MAX1641,设计了12V输出的MAX1641应用电路、采用2级运放构成的电压检测、基于恒流源的电源线电流检测和基于数字温度传感器DS18B20的温度检测。最后给出系统的软件设计流程。本设计集成度和充电效率较高,实现简单,工作可靠,可望在光伏工程中得到应用。     

基于ADuc848的高精度温控器的硬件设计

利用ADuc848片内集成的16位A／D转换器和各种数字模块，设计一种高精度温控器，具有设计简单、功能强、成本低的优点。在抗干扰设计方面，采用模拟光耦HCNR200隔离来自热电耦的噪声，采用数字光耦和脉冲变压器隔离来自可控硅的噪声。     

基于SoC芯片的微型电压信号实时采集系统设计

系统采用SoC微控制器和ADuC848新型控制器为核心结构,采用AD8230芯片对传感器形成的电压信号进行两级放大处理,以ADuC848内部自带A/D转换部分对模拟量进行采集,降低系统设计的复杂性,缩小了PCB板的实际大小。最终设计出易嵌入到工作设备内部的微型的电压信号实时采集系统,为采集无人环境处的信息提供了一种便捷实用的方法。