张皓宇，杨风暴，王肖霞.基于关联成像的气缸盖内壁影像检测方法研究[J].内燃机工程,2021,42(6):30-36.
基于关联成像的气缸盖内壁影像检测方法研究
Research on Image Detection Method of Cylinder Head Inner Wall Based on Correlation Imaging
DOI：10.13949/j.cnki.nrjgc.2021.06.005
关键词:气缸盖  关联成像  内壁检测  热场
Key Words:cylinder head  correlation imaging  inner wall inspection  thermal field
基金项目:内燃机可靠性国家重点实验室开放课题项目（skler-202011）;山西省回国留学人员科研资助项目（2021）
作者单位
张皓宇，杨风暴，王肖霞 中北大学 信息与通信工程学院，太原 030051 
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摘要:为对内燃机正常工作下气缸盖内壁火力面进行检测，提出了一种基于关联成像的气缸盖内壁影像检测技术，通过采集气缸盖底板内壁热场分布及气缸盖底板外壁总热量，利用两组数据间的联系进行关联运算间接地重构出气缸盖内壁的影像。通过不同工况下气缸盖内壁的温度变化规律，得到了内壁区域的热场，从理论上推测了应用关联成像技术的可行性。运用数据模拟的方法对单缸双气门、单缸四气门和双缸双气门气缸盖进行影像重构，重构影像的峰值信噪比和结构相似性指标分别可达66.79dB、0.427。结合气缸盖内壁缺陷区域结果分析，该技术可清晰呈现气缸盖内壁影像，有利于气缸盖内壁检测的直观性体现。
Abstract:In order to detect the fire surface of the inner wall of the cylinder head under the normal operation of the internal combustion engine, an image detection technology of the inner wall of the cylinder head based on correlation imaging was proposed. The thermal energy field distribution of the inner wall of the cylinder head bottom plate and the total heat of the outer wall of the cylinder head bottom plate were collected, and the connection between the two sets of data to perform correlation operations was used to indirectly reconstruct the image of the inner wall of the cylinder head. According to the temperature change law of the inner wall of the cylinder head under different working conditions, the thermal energy field of the inner wall area was obtained, and the feasibility of applying the associated imaging technology was theoretically speculated. The data simulation method was used to reconstruct the image of single-cylinder double-valve, single-cylinder four-valve and double-cylinder double-valve cylinder heads. The peak signal-to-noise ratio and structural similarity index of the reconstructed image can reach 66.79dB, 0.427 respectively. Combined with the result analysis of the defect area on the inner wall of the cylinder head, the technology can clearly present the image of the inner wall of the cylinder head, which is beneficial to the intuitive embodiment of the inner wall of the cylinder head.
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