Indirect Temperature Measurement in High Frequency Heating Systems.
Indirect Temperature Measurement in High Frequency Heating Systems.
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DOI：
10.3390/s21072561
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发表时间：
2021-04-06
期刊：
影响因子：
--
通讯作者：
Trushnikov D
中科院分区：
文献类型：
--
作者：
Oskolkov A;Bezukladnikov I;Trushnikov D
熔融沉积成型（FDM）/熔丝制造（FFF）3D打印的最大挑战之一是保持层与层之间粘附力的一致性，以及在更大范围内，整个打印对象内部材料的均匀性。提出了一种基于在印刷过程中对挤出材料温度进行快速可靠控制的方法来缓解和/或解决这些问题。使用具有最小质量（<1g）的喷嘴的高频感应加热。为保证大功率（峰值功率> 300 W）加热系统加热和冷却过程的动态特性，提出了一种间接（涡流）测温方法。它是基于动态分析的各种温度相关参数直接在加热过程中。为了提高温度测量精度，提出了一种包含感应加热线圈的串并联谐振电路、期望信号检测方法、数字信号处理算法以及期望信号与温度和磁场强度关系的回归模型。实验台系统的设计，以确认所进行的研究结果表明，所提出的间接测量方法的有效性。在±3 °C的精度下，在50至350 °C的工作温度范围内，测量时间为20 ms。基于间接测量方法设计的温度控制系统将提供高的机械性能和印刷物体的一致质量。
One of the biggest challenges of fused deposition modeling (FDM)/fused filament fabrication (FFF) 3D-printing is maintaining consistent quality of layer-to-layer adhesion, and on the larger scale, homogeneity of material inside the whole printed object. An approach for mitigating and/or resolving those problems, based on the rapid and reliable control of the extruded material temperature during the printing process, was proposed. High frequency induction heating of the nozzle with a minimum mass (<1 g) was used. To ensure the required dynamic characteristics of heating and cooling processes in a high power (peak power > 300 W) heating system, an indirect (eddy current) temperature measurement method was proposed. It is based on dynamic analysis over various temperature-dependent parameters directly in the process of heating. To ensure better temperature measurement accuracy, a series-parallel resonant circuit containing an induction heating coil, an approach of desired signal detection, algorithms for digital signal processing and a regression model that determines the dependence of the desired signal on temperature and magnetic field strength were proposed. The testbed system designed to confirm the results of the conducted research showed the effectiveness of the proposed indirect measurement method. With an accuracy of ±3 °C, the measurement time is 20 ms in the operating temperature range from 50 to 350 °C. The designed temperature control system based on an indirect measurement method will provide high mechanical properties and consistent quality of printed objects.
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影响因子：
11
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