共查询到18条相似文献,搜索用时 125 毫秒
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利用自研的黑匣子炉温测试系统,依据AMS270E《高温测量》设计了大型连续式热处理炉内运动板坯的均匀性测试方案,并基于设计方案对某钢厂S35C型板坯连续式热处理炉进行实际均匀性测试与分析。测试结果表明,自研的黑匣子炉温测试系统能满足高温板坯连续运动条件下的温度均匀性测试要求。板坯入炉后温度迅速上升,并逐渐达到目标温度进入均热阶段,对比均热段数据,板坯各个位置温度都达到指标要求,整体温度均匀性较好,板坯在炉内的热处理温度和时间与规定的工艺设计要求一致。为大型连续炉均匀性和板坯测试提供一种有效的方法。 相似文献
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温度均匀性是衡量热处理设备的一个重要指标,在实际操作中,普遍认为温度均匀性很难符合要求,本文主要对造成炉温均匀性不合格的因素进行分析并总结改善方法。 相似文献
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热电偶是检测真空炉温度均匀性的常用计量器具,但目前热电偶的几何特性及发射率对炉温均匀性检测影响方面的研究较少.本文利用数值模拟方法研究了热电偶发射率和直径对真空炉温度均匀性检测的影响,结果表明直径和发射率对常用规格热电偶稳态温度影响量级相当.开展零维模型分析,结果表明热电偶温度对直径和发射率相对变化率的敏感性相等,验证... 相似文献
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基于LabVIEW的吸气剂吸气性能定容测试系统 总被引:1,自引:1,他引:0
图形化编程语言LabVIEW(Laboratory Virtual Instrument Engineering Workbench),用于一种吸气剂吸气性能定容测试系统。根据理想气体状态方程,在气体体积与摩尔量一定时,气体压强随气体温度的变化而变化,从而影响吸气剂性能的测试。由此,设计了一种温度测量电路,提出了基于理想气体状态方程的温度补偿算法,实现了压强的温度补偿。以吸气剂吸气性能定容测试系统为平台,测试结果表明,该系统稳定可靠、简单实用、拥有友好的人机交互界面,具有温度补偿功能;该温度补偿方法正确可行,效果良好,很好的去除了温度对压强的影响,从而吸气剂性能测试更加准确可靠。 相似文献
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本文通过对铝卷材退火炉空载进行温度测量,阐述影响铝卷材退火炉炉温均匀性的各项因素,并做出系统性分析,得出准确有效进行铝卷材退火炉温度均匀性测量控制的方法。 相似文献
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本文对实验室所使用的恒温箱和高温炉采用二位式温度调节仪控制炉温,提出在不增加用户较大成本的情况下来改善炉温温度波动度、温度均匀性、温度偏差的几种方法。 相似文献
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通过对热处理设备测温的总结,结合实际工作经验,开发了该数据采集系统.用来满足各种不同热处理设备的炉温均匀性测试. 相似文献
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The optimization of temperature control in a vacuum furnace used for selenization of Cu/In metallic precursors for CIS solar cells is described. The heat transfer between all parts of the furnace was analysed using SIMULINK programming. A system of state equations describing all elements of the object (vacuum furnace) is represented in the matrix form. The performed simulations were compared with experimental variations of temperature with time indicating very good agreement. The results obtained were utilized for the temperature control. A comparison of the constant control signal used in previous experiments with the one obtained from calculations indicates that the desired temperature profile in the furnace is obtained in a much shorter time when applying the calculated control. 相似文献
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本文介绍了一种基于ARM7微处理器和μC/OS-Ⅱ操作系统的嵌入式热处理多用炉温度控制系统的设计方案。阐述了该系统硬件结构原理和设计方案。详细讨论了系统软件的层次结构、实现流程和主要任务的功能。设计了一种热电偶冷端温度硬件补偿的电路。该温控系统具有测控精度高、实时性好、功能丰富等特点。 相似文献
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结合邯钢2250热轧厂步进式数字化脉冲式加热炉的实际应用效果,为了能更好的满足轧机稳定轧制的要求,利用脉冲燃烧技术,对温度均匀性控制进行研究,得出合理的控制方法,满足工艺要求、轧机稳定轧制,使其体现出步进式数字化脉冲式加热炉的先进性能。 相似文献
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M. Sadli K. Anhalt F. Bourson S. Schiller J. Hartmann 《International Journal of Thermophysics》2009,30(1):69-76
The general statement that a temperature fixed-point cell will show better melting and freezing plateaux with better temperature
uniformity along the dimensions of the fixed point is understood to be valid for metal-carbon (M-C) eutectics as well as for
pure metal fixed points. In this article, it is shown that improved temperature uniformity in the central part of the high-temperature
blackbody BB3200pg (HTBB), where the M-C fixed point is implemented, results in flatter and longer plateaux. Pyrolitic graphite
rings, clamped together by a spring, form the heated cavity of the HTBB. As a first step, the relative electrical resistivity
of each pyrolitic graphite ring was measured using a method advised by the furnace manufacturer. Next, the ring positions
were optimized, taking into account their relative resistivities, in order to obtain a more homogeneous temperature distribution.
Subsequent measurement of the temperature uniformity at the furnace walls confirmed the improvement. Measuring the melting
plateaux of the Pt-C eutectic with different arrangements of the rings, and thereby operating the fixed-point cell in different
temperature distributions, confirmed the influence of the temperature distribution on the plateau shape, with the best plateau
shape corresponding to the most homogeneous temperature distribution. 相似文献