共查询到18条相似文献,搜索用时 110 毫秒
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论述了目前木材干燥控制系统的现状及存在问题,提出了将模糊控制技术应用于木材干燥控制系统的发展方向。 相似文献
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随着木材干燥技术的日趋完善,以往一些检测精度低、检测参数不完整的木材干燥窑测控产品已不能适应客户的需求,同时早期的木材干燥控制系统又出现了不能与新工艺紧密结合的问题.基于上述原因,哈尔滨宇达电子技术有限公司充分开展与高校的技术合作,开发了新型木材干燥窑自动检测控制系统. 相似文献
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韩宏 《林业机械与木工设备》2005,33(12):18-19
1 木材干燥控制系统简述
木材干燥是保证木制品加工质量的关键技术,是合理、高效、节约利用木材的重要措施,是木材加工工业不可缺少的重要环节之一.随着时代的发展与技术的进步,在现代计算机技术与微电子技术的推动下,木材干燥的生产方式已发生重大改变. 相似文献
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木材干燥工艺温度控制系统目前多采用传统的PID控制方法.本文介绍了模糊控制在木材干燥工艺中的应用.仿真结果表明这种控制方法比传统的PID控制系统精度高、速度快,具有一定的应用价值. 相似文献
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介绍一种以8031单片机为核心的木材干燥控制系统的功能与工作原理,描述了该系统中以8031单片机为核心的硬件系统、软件结构以及采取的抗干扰措施。该系统实际应用效果表明:它能按程序设定的要求对木材干燥过程进行精确控制,使干燥质量明显提高,干燥时间缩短10%~30%。 相似文献
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介绍了蒸汽式木材干燥窑计算机全自动控制系统的软、硬件设计、系统功能、控制原理及系统使用方法。 相似文献
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The first part of this contribution determined the demands on climate control in vacuum drying kilns that are necessary to achieve the final moisture content variation stipulated in the European Drying Group (EDG) proposal on wood drying quality standards. In this second part of the contribution, these demands are compared with measurements of actual climates and the resulting final moisture content in vacuum kilns during industrial production. The measurements show that none of the studied industrial vacuum kilns are capable of controlling climate with acceptable accuracy. The variations in drying climate lead to large variations in final moisture content and reduced production capacities. Drying quality and drying capacity would be greatly increased with improved kiln design and improved climate control systems. Critical factors in kiln design and climate control system design necessary to maintain a controlled drying climate are listed. 相似文献
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《Wood material science & engineering》2013,8(1-2):12-20
Abstract Progressive (semi-continuous) kilns for softwood drying are very common in Finland and Sweden and are used in some other countries too. A simulation program has been developed that covers all three types of this kiln. The program calculates the climate in the length direction of the kiln and moisture content, moisture profile, wood temperature, slicing test gap and stress development. Energy consumption and drying costs may also be determined. The temperature level is the most important parameter regarding kiln efficiency. Two-zone progressive kilns are found to be more efficient than single-zone kilns. Progressive kilns have lower energy consumption and drying costs than batch kilns. Experimental full-scale tests show that the timber quality from a progressive kiln is comparable to, or in some cases even better than, timber dried in batch kilns. 相似文献
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本文介绍了两种顶吹型干燥窑的结构特征,测定了通过材堆的气流速度、空气再循环比、壳体与环境温度差和对主要技术经济指标等资料的分析,评估它们结构的优缺点。也探讨了橡胶木的干燥基准和过程自动控制问题。 相似文献
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木材干燥窑的保温性与节能分析 总被引:5,自引:3,他引:2
常规砖砌壳体木材干燥窑热能消耗大,节能潜力很大,本文通过对窑体保温材料和大门密,保温性能改进措施的分析及应用,结果表明,壳体热损失减少60%以上,总能源可减少12%以上,节能效果显著,此外对用热油作为导热介质,也探讨了其节能的可行性。 相似文献