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单片机控制的步进电机系统 总被引:2,自引:0,他引:2
很多工业控制设备对位移和角度的控制精度要求较高,一般电机很难实现,而步进电机可精确实现所设定的角度和转数.本设计主要是运用51单片机控制4相步进电机系统,由单片机产生驱动脉冲信号,控制步进电机以一定的转速向某一方向产生一定的转动角度. 相似文献
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近年来,随着对步进电机控制系统研究的深入,我国积累了较多的步进电机控制系统设计经验,拓宽了步进电机的使用范围,取得了较好的应用效果.笔者结合当前已有的研究成果,概述了步进电机的基本结构和工作原理,分析了基于单片机的步进电机控制系统设计要点,并以STC89C52单片机为例,详细探讨了步进电机控制系统设计,仅供参考. 相似文献
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单片机是步进电机系统的重要组成部分,对于步进电机系统的驱动控制具有重要的影响。通过分析步进电机系统的工作原理,对步进电机系统进行规划设置。达到降低步进电机的使用成本,提高步进电机的效率与性能的效果。文章主要探讨基于单片机的步进电机系统设计方法。 相似文献
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很多工业控制设备对位移和角度的控制精度要求较高,一般电机很难实现,而步进电机可精确实现所设定的角度和转数。本设计主要是运用51单片机控制4相步进电机系统,由单片机产生驱动脉冲信号,控制步进电机以一定的转速向某一方向产生一定的转动角度。 相似文献
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步进电机控制系统的研究 总被引:4,自引:0,他引:4
步进电机具有快速启停,精确步进以及能直接接收数字量等特点,所以在定位场合中得到了广泛的应用。因此采用单片机来控制步进电机,借助于软件实现复杂的控制。其系统成本不高,同时还可以很灵活地改变程序来改变控制方案。 相似文献
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设计了一种蚕茧自动排列输送装置,它能够将蚕茧整齐地排列在输送轨道上面,方便对蚕茧的后续加工。系统采用单片机对步进电机和电磁铁进行控制。此外,单片机和各传感器的配合使整个软件控制形成闭环系统,从而保证了装置作业的可靠度。该设计实现了对蚕茧的自动分离和整齐排列等操作,结构简单,作用可靠,可广泛应用于蚕茧的自动化生产过程中。 相似文献
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步进电机是数字控制系统的执行元件,其主要功能就是将脉冲电信号变换为相应的角位移,以此对电流进行控制。将单片机嵌入步进电机控制系统中可以提高步进电机的系统性能,实现精细化控制。 相似文献
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《Journal of Agricultural Engineering Research》1998,69(3):249-254
A model to represent the discolouration of dried powder of carrots as a function of temperature was developed. Two types of carrots, Asian and European, containing large amount of lycopene and β-carotene, respectively, were tested. The dried powder was stored under an atmosphere with O2and at three different temperatures, 5,20 and 35°C. The surface colour of the powder was monitored during storage by a Hunter colour ratioa/b. In the proposed model, the rate of oxidation was assumed to be represented by the product of the fraction of concentration of oxidized pigment at arbitrary time and a specific rate of oxidation of pigment. The rate parameters in the proposed model were calculated by fitting the experimental data with smooth curves by trial and error at the end of the induction period but before discolouration took place. The frequency constant and activation energy, expressing the temperature dependence of the rate parameters, were expressed by the Arrhenius relation. The simulation results of a Hunter colour ratioa/bof dried powder at 25°C showed good agreement with the experimental data, suggesting that the proposed model was effective for the prediction of discolouration of dried powder of both types of carrot. The use of the induction period in the manner described may enable the shelf life of dried powder to be predicted. 相似文献
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感官检验棉花的品级,这是农村常见的一种检测手段.它的一个主要特点就是存在不确定性.这是由于检验员的品级检验水平存在一定的差异,其中有很多因素制约着检验的结果.文章对影响感官检验结果的因素进行了系统的分析. 相似文献
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The fractional outflow rate of water from the rumen, measured as the rate of disappearance of the chromium complex of ethylenediamine tetra-acetic acid, was related to a number of dietary factors. A multiple regression equation was derived which expressed fractional outflow rate as a function of the intakes of dry matter, ash, acid-detergent fibre and crude protein.The data analysed consisted of 243 observations for sheep on 59 diets, including forage, concentrate and mixed diets. The ranges covered by the data were: fractional outflow rate 0.7–3.6 day?1; dry matter intake 560–1400g/day; ash 4–30%, acid-detergent fibre 7–41%, crude protein 5–26 % of dry matter; there were no observations for sheep of less than 34 kg liveweight.The equation accounted for 56·3 % of the total variance. Between-sheep variance could not be calculated for the whole of the data but was undoubtedly substantial since, for a sixth of the data, it was known to account for 38 % of the total variance. 相似文献
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从灾害经济学的角度探讨了城镇供水优化调度的必要性和可能性,认为在缺水不可避免的情况下,对供水进行优化调度可以减小缺水带来的损失,产生较好的减灾效益,特别是可以大大减小严重干旱的灾害效应。并根据水资源的特性,提出了缺水损失的计算模式以及优化调度的原则和方法。 相似文献