微机技术在管道阴极保护中的应用

以微机技术应用于外加电流保护领域,是国内外当前引起关注的问题,在西欧一些国家的舰船上有人见过微机管理的阴极保护设备的产品。在我国也有一些单位开展这一方面的工作。如何利用微机新技术,设计一种适合我国国情,具有较高性能价格比的外加电流保护设备,是大家关心的问题。三明市无线电二厂开发了KSW-D和PS-1两种型号的微机管理恒电位仪。木文以KSW-D微机管理恒电位仪的设计实践为例,谈点体会。     

智能频率计的硬件和软件

本文介绍的智能频率计是一种带微机的多功能的通用电子计数器,文中详述了智能频率计的系统硬件和软件,为研制性能价格比高的时间和频率测量仪器提供了一种系统的设计方法.     

微机温室综合环境控制系统

本文阐述一个由上下位微机组成的温室综合环境监控管理系统。它通过单片机对温室综合环境因子采集及上位４８６ 微机监控和管理,实现对温室综合环境控制功能。     

我国渔船无线电应急示位标标准存在的问题探讨

对比分析无线电应急示位标的国内、国际标准,分析目前我国渔船无线电应急示位标标准的欠缺之处,及标准中亟需变更的参数、方法,使标准满足目前产品生产的实际需要,提升标准的可操作性。     

动态应变采集系统的设计

动态应变采集系统是通过便携式微机向单片机发送命令,由单片机根据频率,量程,数量等参数控制采集工作的进行。便携式微机用于对所得数据作进一步处理。该系统可方便的用于设备的可靠性验证,故障分析等。     

微机控制系统中抗干扰的方法

介绍了微机控制系统中,干扰信号的来源及对微机工作的影响,及系统中几种实用的抗干扰方法．     

数字式多功能电液阀在微机发油系统的应用

介绍了数字式多功能电液阀的工作原理及性能特点。针对该阀在微机发油系统中的应用及发油控制要求，提出了采用预置累积流量控制点和在输出控制算法中引入修正因子的方法，目的是保证微机发油控制安全、高效、小冲量、高精度。使用数字式多功能电液阀能充分发挥微机控制的软件优势。该仪器具有较好的推广应用价值。     

温室温度微机控制节省电能的研究

装置简单,设置容易,使用方便,容易控制,清洁卫生都是电能供热的优点。所以尽管电价较高,也还是在科研用小型温室、苗床小型温室、家庭用微型温室等场合得到普遍应用。目前,多用普通继电器控制小型温室的温度。研完证明,由于其热源的输出功率是恒定的,故对电能颇有浪费。随着微机价格迅速地降低,农业工程中应用微机监视、计测、控制、管理的事例越来越多。机械与电子的结合是今后的必然趋势。本研究就是使用单板机控制温室温度的。其热源输出功率可以调节,故避免了电能的浪费。可见微机控制是节省宝贵电能的好途径。如若微机用于其他耗能过程的控制,也一定会得到良好效果是不难连想的。     

油库的微机控制多路发油系统

为改善油库传统的工作方式,提高石油产品输出计量过程的准确性和合理性,促进发油系统能源节约和科学管理工作的开展,利用微机技术开发研制了由主控制系统、执行元件驱动单元、一次传感器件单元和执行单元组成的油库多路发油系统。该系统具有较高的稳定性、抗干扰性、功能齐全、控制准确、计量精度高、投资较低等特点,在油品输出与计量方面具有广泛的应用价值。     

内胎硫化中集散式微机系统控制的设计

针对汽车内胎硫化装置的特点,设计了集散式微机控制系统。系统主要由现场工业控制微机和集中管理个人计算机构成,控制和管理软件采用ＶＢ．ＦＯＸＢＡＳＥ和汇编语言联编而成,在Ｕｃｄｏｓ汉字操作系统环境下运行。系统建立了较高精度的橡胶硫化过程优化控制数学模型,采用先进的竺效硫化工艺实现对汽车内胎的硫化控制,该系统不仅能提高产品质量,节约能源,还可减轻劳动强度,提高车间的生产管理水平。     

油罐测量仪表的现状及发展趋势

目前国用液位测量仪表虽然种类繁多,但缺乏精度高而价格低的液位测量仪表。分析了国内主要几种油罐液位的使用现状,介绍了国内生产的向种先进的测量仪表性能,并对其实际应用的前景作了预测。     

温室环境微机测控系统的研制

根据工厂化农业的要求,研制了温室环境微机测控系统.系统由一台主控机和分布于现场的多台测控机组成,通过RS-422A串行总线方式连接.测控机由89C52单片机控制,使用多个传感器测量温室中的温度、湿度、光照度、CO₂浓度等环境参数.主控机完成数据的采集存储显示、数据库维护和专家决策控制.系统具有结构简单、可靠性高、扩展性能好、抗干扰能力强等特点.     

对光栅式齿轮单啮仪测量设备能力的探讨

为了避免对产品验收的误判,不同精度要求的测量对象,应选择相应能力的测量设备。本文对光栅式齿轮单啮仪进行了测量设备能力及系数的分析和计算,依此定量评定其测量设备能力的高低。这样的数量特征对测量设备(最仪)之间的实际效果对比等,都很有适用价值。     

新型土壤孔隙水压力检测系统的研制与建模

分析了土壤含水率和孔隙水压力测量的应用领域和研究现状;阐述了建立二者之间数学模型的意义;介绍了目前国内外几种常用的测量方法、测量手段和相关仪器设备,并对比了他们之间的优缺点.介绍了系统各部分的功能结构、测量原理和数据分析过程.在分析结果数据、仪器监测数据和前期结论的基础上,得出了一种算法,根据该算法编写了软件,实践证明...     

Radio stars

Up to the present time six classes of radio stars have been established. The signals are almost always very faint and drastically variable. Hence their discovery has owed as much to serendipity as to the highly sophisticated equipment and techniques that have been used. When the variations are regular, as with the pulsars, this characteristic can be exploited very successfully in the search for new objects as well as in the detailed study of those that are already known. The detection of the most erratically variable radio stars, the flare stars and the x-ray stars, is primarily a matter of luck and patience. In the case of the novas, one at least knows where and oughly when to look for radio emission. A very sensitive interferometer is clearly the best instrument to use in the initial detection of a radio star. The fact that weak background sources are frequently present makes it essential to prove that the position of a radio source agrees with that of a star to within a few arc seconds. The potential of radio astronomy for the study of radio stars will not be realized until more powerful instruments than those that are available today can be utilized. So far, we have been able to see only the most luminous of the radio stars.     

Advance of Study on Design Methods of Hydraulic System of Radio Remote Control of Construction Machinery

The working principle of radio remote controlling of construction machinery should be that signals of the radio wave from the transmitter obtained in the receiver were controlled and then changed into electronic analog or digital signals which can be used to drive different actuators and mechanisms of the vehicle. The vehicle could be acted by following the controlling instructions sent by the operator. The best operation mode of construction machinery is suitable not only to manual operating but also to remote controlling in the same vehicle. The design methods of the hydraulic system used for the radio remote controlling of construction machinery are discussed. The design methods of hydraulic circuits for the actuators controlled by solenoid on-off type valves ,hydro-electronic multi-way proportional valves,closed loop proportional servo driver or threeway proportional reducing valves are discussed in detail (with real example). The design methods of the power shift transmission of electro-hydraulic controlling,the devices of braking and the directional streering are discussed in this paper.     

流量计的在线检定

介绍了双向标准体积管在线实液检定流量计的工艺特点、工作原理和操作程序,通过分析影响流量计在线检定结果的主要因素,指出控制好检定环境,选择合适的测温、测压仪表,准确读取温度、压力等参数,才能获得可靠的检定结果.     

水闸管理的微机通信网络

在水闸管理上,以多台Tp801单板微型计算机、输入输出接口电路、SIO串行通信接口电路、Tp801D板、12吋绿色显示器、打印机等组成一种远距离传送数据的微机通信网络,它利用电话线路作为数据传输的通道,在淮阴市盐东控制工程管理处投付使用。运行稳定,性能可靠,于1985年9月通过技术鉴定。     

Remote sensing of the magnetic moment of uranus: predictions for voyager

Power is supplied to a planet's magnetosphere from the kinetic energy of planetary spin and the energy flux of the impinging solar wind. A fraction of this power is available to drive numerous observable phenomena, such as polar auroras and planetary radio emissions. In this report our present understanding of these power transfer mechanisms is applied to Uranus to make specific predictions of the detectability of radio and auroral emissions by the planetary radio astronomy (PRA) and ultraviolet spectrometer (UVS) instruments aboard the Voyager spacecraft before its encounter with Uranus at the end of January 1986. The power available for these two phenomena is (among other factors) a function of the magnetic moment of Uranus. The date of earliest detectability also depends on whether the predominant power source for the magnetosphere is planetary spin or solar wind. The magnetic moment of Uranus is derived for each power source as a function of the date of first detection of radio emissions by the PRA instrument or auroral emissions by the UVS instrument. If we accept the interpretation of ultraviolet observations now available from the Earth-orbiting International Ultraviolet Explorer satellite, Uranus has a surface magnetic field of at least 0.6 gauss, and more probably several gauss, making it the largest or second-largest planetary magnetic field in the solar system.