共查询到20条相似文献,搜索用时 46 毫秒
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介绍了摇振系统的工作原理,摇振系统的控制要求,摇振系统的操作数据设置,摇振系统的运行前提条件和系统参数设置. 相似文献
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传统地毯织机无法生产多花色、样式复杂的地毯,这类地毯只能通过手工生产,效率低下,价格昂贵。设计了一种基于倍服PLC控制器的工艺地毯织机控制系统。使用C#语言编写上位机软件,软件采用改进八叉树色彩量化法实现对图片的色彩量化处理,通过ADS通信实现与下位机的通信。基于倍服CX8090型PLC控制器根据上位机发来的数据和编写好的逻辑,通过485通信控制变频器、伺服驱动器和纠偏步进电动机驱动器通过脉冲控制位移电动机驱动器,通过电动机模块控制换色电动机和钩纱电动机。生产实践表明,该系统能实现工艺地毯的自动化生产,工作性能稳定操作简单,生产效率较高,可满足生产要求。 相似文献
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介绍了一个由贝加莱的PCC与西门子交流变频器联网组成的多电动机调速控制系统。采用基于RS-485接口的USS协议实现了PCC与多台交流变频器的串行通信控制。该系统可以对各变频器的运行参数进行在线监测,并进行远程控制,能有效地减少系统布线、提高系统的抗干扰能力,为印染自动化提供了一个低成本和高性能的方案。 相似文献
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Microwave and Radio Frequency Processing 总被引:3,自引:0,他引:3
《Journal of Food Safety》2000,65(S8):32-41
SCOPE OF DELIVERABLES: The use of microwave and radio frequencies to heat food for commercial pasteurization and sterilization in order to enhance microbial safety is discussed here. Although not under FDA regulations, use of microwave technology to enhance microbial food safety in the home is also discussed briefly. Mechanisms of heating food and destroying pathogens, and the validation of industrial processes are also discussed, followed by conjecture on handling deviations during industrial processing. This document summarizes information obtained through published literature and personal contacts with industry, academia, and government. Although radio frequency is covered whenever possible, very little information on radio frequency heating for commercial pasteurization or sterilization of food is available in the published literature and no commercial facility for this purpose could be located. The microbial inactivation mechanisms of radio frequency heating are also quite similar to those of microwave heating. Thus, this document refers mostly to microwave processing with the implicit assumption that the principles are generally applicable to radio frequency. Specific information on radio frequency is included whenever available. 相似文献
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Conventional aqueous scouring of greasy wool promotes wool felting and can be energy and water intensive. Ultrasonic wool scouring could be an alternative technology to minimise the negative impact, provided that the cleaning efficiency and fibre quality are not compromised. This study examined the influence of ultrasonic irradiation frequency and ultrasonic power variations on wool scouring performance at different liquor ratios. Scoured fibre, residual ash content, residual grease content, whiteness and yellowness were evaluated. The impact of liquor degassing on wool scouring effectiveness was studied. Fibre surface damage was also assessed in this work. It was observed that while there was no significant influence of ultrasonic frequency on the whiteness or yellowness of the scoured fibres, wool scoured at frequencies of 28 kHz and 80 kHz had more grease and dirt removed than that scoured at 45 kHz. Low ultrasonic power and degassed bath liquor increased wool grease removal ability. Ultrasonic treatment caused scale cracking/peeling in some wool fibres. More severe cuticle damage was observed in fibres scoured at the lower frequency. This damage resulted in increased dye uptake by the fibres. 相似文献
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在最近的几年当中,无线电频率识别(RFID)技术发展显著。在这个时段之前,缺少生产标准和支持不同RFID应用的基础结构使这一创新的技术起点受到质疑。 相似文献