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2022 4th International Conference on Intelligent Control, Measurement and Signal Processing (ICMSP)最新文献

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Determination of the relationship between object distance and optimal defocus level for fringe projection systems 条纹投影系统中物体距离与最佳离焦水平关系的确定
Yangyang Jia, Shourui Yang
In fringe projection measurement, the suitable defocus of the projector can improve the measurement accuracy. This paper presents a method to determine the optimal defocus level in different object distances. In each object distance, this method adjusts the focal length of the projector through some special patterns, and the plane plate is measured by binocular fringe projection measurement system in different defocus levels. Then, the fitting plane error in different defocus levels is polynomial fitted, and the optimal defocus degrees are calculated on the fitting curve. Finally, the corresponding relationship between the object distance and the optimal defocus level is obtained by spline interpolation fitting. Experimental results show that this method can be successfully applied to fringe projection measurement with any object distance, and the measurement accuracy is improved by more than 10%.
在条纹投影测量中,适当的投影仪离焦可以提高测量精度。提出了一种在不同物体距离下确定最佳离焦水平的方法。该方法在每个物体距离内,通过一些特殊的图案来调整投影仪的焦距,并通过双目条纹投影测量系统测量不同离焦水平的平面板。然后对不同离焦水平下的拟合平面误差进行多项式拟合,并在拟合曲线上计算出最优离焦度;最后,通过样条插值拟合得到目标距离与最佳离焦水平的对应关系。实验结果表明,该方法可以成功地应用于任意目标距离的条纹投影测量,测量精度提高10%以上。
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引用次数: 0
An evaluation method for free- form curve profile based on the distribution characteristics of directed profile error 一种基于有向轮廓误差分布特征的自由曲面轮廓评价方法
Shuaiyin Zhang, Zhongyu Wang, Yinbao Cheng, Xuejiao Dai
This paper describes an evaluation method of free-form curve profile, which uses the distribution characteristics of directed profile error. This method can express the deviation trend of curve contour and the quality of overall contour to a certain extent. It adopts the concept of directed profile error (DPE), which can quantify the feature of the difference between the ideal curve and the actual curve, including size and direction of deviation. To eliminate systematic errors, the calculation of DPE mainly includes two steps, curve registration and curve fitting. Aiming to evaluate the free-form curve profile, this paper analyzes the degree of concentration and dispersion of DPE. The simulation experiment and actual measurement experiment is designed to test the effectiveness and applicability of this method. From the experimental results, this method can be used to describe the profile features of free-form curves better and meet the needs of quality assessment.
本文介绍了一种利用有向轮廓误差分布特性的自由曲面轮廓评价方法。该方法可以在一定程度上表达曲线轮廓的偏差趋势和整体轮廓的质量。它采用了定向轮廓误差(DPE)的概念,可以量化理想曲线与实际曲线之间的差异特征,包括偏差的大小和方向。为了消除系统误差,DPE的计算主要包括曲线配准和曲线拟合两个步骤。以评价自由曲线轮廓为目的,分析了DPE的集中分散程度。通过仿真实验和实际测量实验验证了该方法的有效性和适用性。实验结果表明,该方法能较好地描述自由曲面的轮廓特征,满足质量评价的需要。
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引用次数: 0
Dynamic Compensation Method for Temperature Measurement Error of High Temperature and High-speed Airflow 高温高速气流测温误差的动态补偿方法
Jingrui Chu, Shi-kui Wang, Gang Yang, Wenhang Wang
Aiming at the simulation requirements of airflow temperature signal for the total temperature simulation device of hypersonic aircraft, an airflow temperature simulation system is designed. The system consists of a high-temperature plasma spray gun, an airflow mixing chamber, and a thermocouple. The maximal temperature of the system is high and the temperature changes rapidly. But the thermocouple responds slowly, hence there is a large error when measuring the airflow temperature. However, the accuracy of airflow temperature measurement results is important to improve the accuracy of airflow temperature simulation signals. In order to improve the accuracy of airflow temperature measurement and reduce the measurement dynamic error. Based on the analysis and research of the airflow temperature signal simulation system, this paper adopts double thermocouples to measure the airflow temperature, and proposes a time domain compensation method to compensate the airflow temperature measurement results. Experimental results show that the double thermocouple compensation method can reduce the measurement error effectively.
针对高超声速飞行器总温度仿真装置对气流温度信号的仿真需求,设计了一套气流温度仿真系统。该系统由高温等离子喷枪、气流混合室和热电偶组成。系统最高温度高,温度变化快。但热电偶响应缓慢,因此在测量气流温度时存在较大误差。然而,气流温度测量结果的准确性对于提高气流温度模拟信号的准确性至关重要。为了提高气流温度测量的精度,减小测量动态误差。本文在分析研究气流温度信号仿真系统的基础上,采用双热电偶对气流温度进行测量,并提出了一种时域补偿方法对气流温度测量结果进行补偿。实验结果表明,双热电偶补偿方法可以有效地减小测量误差。
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引用次数: 1
Fuzzy Evaluation Method of DPDFS for Unity Game Based Brain Training toward Prevention of AD 统一游戏脑训练预防AD的DPDFS模糊评价方法
Tao Wu, Cuiyun Gao, Shujin Wan, Yan Liu, XiaoZhuang Sun, Yang Zhao
The proportion of Alzheimer's disease (AD) has been increasing fast in recent years, and game based brain training is helpful to prevent Alzheimer's disease and early treatment. But it is hard to evaluate the result of brain training. Therefore, the research group designed a brain health exercise game based on Unity, and proposed a fuzzy scoring of evaluation method based on difference value of progress degree corresponding to different steps, named DPDFS. The model was tested through the scores of 30 consecutive games of 120 participants aged from 22 to 29. The results show that the model is very suitable for new hand in games, and it also verifies the effectiveness of games on brain training.
近年来,阿尔茨海默病(Alzheimer’s disease, AD)的发病率呈快速上升趋势,基于游戏的大脑训练有助于阿尔茨海默病的预防和早期治疗。但是大脑训练的效果很难评估。为此,课题组基于Unity设计了一款脑健康运动游戏,并提出了一种基于不同步骤对应的进度度差值的模糊评分评价方法,命名为DPDFS。通过120名年龄在22岁至29岁之间的参与者连续30场比赛的得分来测试该模型。结果表明,该模型非常适用于新手手游,也验证了游戏对大脑训练的有效性。
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引用次数: 0
Parameter optimization design of near-bit electromagnetic wave antenna system 近位电磁波天线系统参数优化设计
Jie Wu, Yusha Zhu, Limeng Liu
Under the same formation conditions, when the tool selects different working parameters, the obtained responses are also different. In both cases without drill collar and with drill collar, the paper will adopt the single-transmitter and double-receiver coil structure with the transmitter coil tilted and the receiver coil vertical, analyzing the impact of different parameters on the logging response, these parameters including transmit frequency, coil source spacing, receiver spacing, and drill collar conductivity. The results show that the response is the best when the frequency is 2MHz, the distance between the transmitter and receivers is 0.5m, the distance between the two receivers is 0.15m, and the conductivity of the drill collar is 1000S/m. These conclusions will provide a theoretical basis for the development of near-bit electromagnetic wave resistivity tools.
在相同地层条件下,当工具选择不同的工作参数时,得到的响应也不同。在无钻铤和有钻铤两种情况下,本文将采用单发双收线圈结构,发射线圈倾斜,接收线圈垂直,分析不同参数对测井响应的影响,这些参数包括发射频率、线圈源间距、接收间距、钻铤电导率。结果表明,当频率为2MHz、收发距离为0.5m、收发距离为0.15m、钻铤电导率为1000S/m时,响应最佳。这些结论将为近钻头电磁波电阻率测井仪的发展提供理论依据。
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引用次数: 0
Automatic Edge Segmentation of Surface Antenna for 3D Surface Detection 面向三维曲面检测的曲面天线自动边缘分割
Naiju Guo, Qiang Jiang, Enyu Liu, Yong Zhu, Yulian Zhang, Qinkun Cheng
With the continuous development of radio application systems such as communication, broadcasting, radar, guidance and radio astronomy, people have an increasing demand for surface antennas, one of the important development trajectories. For the high-performance surface antenna, especially a large aperture surface antenna, its three-dimensional shape is helpful for advanced and scientific design. For the 3D reconstruction technology based on Pixel2Mesh, it is necessary to automatically segment the parabolic antenna. In this paper, deep learning technology is used to realize the semantic segmentation of surface antennas. The experimental results show that the designed SAUNet3+ network has excellent performance, and the Dice index can reach 81.39%. The automatic edge segmentation method of surface antenna provides a theoretical and experimental basis for the three-dimensional surface detection task of surface antenna.
随着通信、广播、雷达、制导、射电天文等无线电应用系统的不断发展,人们对地面天线的需求日益增加,地面天线是重要的发展轨迹之一。对于高性能表面天线,特别是大口径表面天线,其三维形状有利于设计的先进性和科学性。对于基于Pixel2Mesh的三维重建技术,需要对抛物面天线进行自动分割。本文采用深度学习技术实现了表面天线的语义分割。实验结果表明,所设计的SAUNet3+网络具有优异的性能,Dice指数达到81.39%。表面天线的自动边缘分割方法为表面天线的三维表面检测任务提供了理论和实验基础。
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引用次数: 0
Automatic line spectrum extraction method based on modal signal characteristic analysis 基于模态信号特征分析的自动线谱提取方法
Xuecheng Wang, Yangmeng Shao
Aiming at the problem of automatic spectral extraction under the background of color noise, this paper proposes an automatic linear spectral extraction method based on modal signal characteristic analysis on the basis of submodal signal characteristic analysis, and verifies the effectiveness of this method through simulation and sea trial data analysis. The results show that the proposed method can realize automatic line spectral extraction under unknown color noise background conditions.
针对彩色噪声背景下的光谱自动提取问题,本文在对次模态信号特征分析的基础上,提出了一种基于模态信号特征分析的线性光谱自动提取方法,并通过仿真和海试数据分析验证了该方法的有效性。结果表明,该方法可以在未知颜色噪声背景下实现线谱的自动提取。
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引用次数: 0
Rotor Design and Simulation analysis of low-power PERMANENT magnet BRUShless DC Motor 小功率永磁无刷直流电动机转子设计与仿真分析
Qunkai Zhi, Lifang Shen, Chuanhui Zhu, Shu-Yao Yan
Permanent magnet brushless DC motor is characterized by green environmental protection, high efficiency and energy saving, small footprint and multiple functions. It is widely used in medical equipment, precision instruments, aerospace and other fields. At present, there are many studies on permanent magnet brushless DC motor, which tend to improve motor performance and reduce the amount of permanent magnets. In this paper, the permanent magnet structure of low-power PERMANENT magnet synchronous motor is studied. The simulation model adopts 4-pole and 6-slot structure. Based on the method of controlling other variables, the influence of different permanent magnet thickness on the performance of permanent magnet synchronous motor is analyzed by ANSYS simulation. The results show that the thickness of permanent magnet has great influence on the magnetic field intensity and air gap density in a certain range. The thickness of permanent magnet is 3.5mm, and the peak torque of groove is 147mm. When the thickness of permanent magnet is 3.5mm, the waveform of air gap flux density is more stable and the flux density distribution is more uniform. Compared with 1.5mm, 2.5mm and 4.5mm, the motor design requirements can be better met, and the amount of permanent magnet is the least.
永磁无刷直流电动机具有绿色环保、高效节能、占地面积小、功能多样等特点。广泛应用于医疗器械、精密仪器、航空航天等领域。目前,对永磁无刷直流电动机的研究较多,趋向于提高电机性能,减少永磁体的用量。本文对小功率永磁同步电动机的永磁结构进行了研究。仿真模型采用4极6槽结构。基于控制其他变量的方法,通过ANSYS仿真分析了不同永磁体厚度对永磁同步电机性能的影响。结果表明,在一定范围内,永磁体厚度对磁场强度和气隙密度有较大影响。永磁体厚度为3.5mm,凹槽峰值转矩为147mm。当永磁体厚度为3.5mm时,气隙磁通密度波形更稳定,磁通密度分布更均匀。与1.5mm、2.5mm、4.5mm相比,能更好地满足电机设计要求,且永磁体用量最少。
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引用次数: 1
Ballistic Missile Launch Position Estimation Based on The First Point Measurement Data of Space Infrared Sensor 基于空间红外传感器首点测量数据的弹道导弹发射位置估计
Xuesong Zhang, Nan Wu, Cheng Liu, Lihua Tong
The space infrared sensor detects the infrared radiation of the engine tail flame in the active section of the missile, and uses this to determine the launch and motion state of the missile. Although the active period is very short, the position and speed of the entire active period from the first point of discovery to the shutdown point plays a decisive role in determining the launch position, range and landing position of the missile. In particular, the accuracy of the launch point position estimation has a significant impact on the subsequent ballistic parameter identification and trajectory prediction. Therefore, aiming at the difficulty of missile launch position estimation, this paper proposes a launch position estimation method based on the first point measurement data of space infrared sensor. Assuming that the missile is detected by the infrared sensor when it is launched on the ground, at this time, the missile is located on the ellipsoidal surface of the earth, and the intersection of the line of sight ray and the ellipsoidal surface of the earth is the launch position. The positioning equation is derived through the geometric relationship, and the launch position is solved using an iterative algorithm, and the unscented transformation is used to complete the error propagation analysis from measurement error to launch point positioning error. The simulation results show that the method proposed in this paper can accurately estimate the position of the launch position, and the accuracy of the plane in geodesic coordinates can reach 10−4 orders of magnitude with an error of 10−4 rad in the angle measurement of the infrared sensor. At the same time, it is also proved that the positioning error of the launch position is correlated with the measurement error.
空间红外传感器探测导弹主动段发动机尾焰的红外辐射,并以此来确定导弹的发射和运动状态。虽然活跃期很短,但从第一个发现点到关闭点整个活跃期的位置和速度对导弹的发射位置、射程和着陆位置起着决定性的作用。其中,发射点位置估计的准确性对后续的弹道参数辨识和弹道预测具有重要影响。因此,针对导弹发射位置估计的难点,本文提出了一种基于空间红外传感器首点测量数据的发射位置估计方法。假设导弹在地面发射时被红外传感器探测到,此时导弹位于地球椭球面上,视线射线与地球椭球面上的交点即为发射位置。通过几何关系推导定位方程,采用迭代算法求解发射位置,并采用unscented变换完成从测量误差到发射点定位误差的误差传播分析。仿真结果表明,本文提出的方法能够准确估计发射位置的位置,红外传感器测角精度可达10−4个数量级,误差为10−4 rad。同时,还证明了发射位置的定位误差与测量误差是相关的。
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引用次数: 1
Design of viscosity reduction system for heavy oil based on ultrasonic 基于超声波的稠油降粘系统设计
Xudong Feng, Bo Dang, Hongwei Qin
At present, the pipeline transportation of heavy oil mainly adopts heating transportation technology, which consumes a lot of energy and may cause condensation accidents. Therefore, the research and application of pipeline heavy oil cold transportation technology is very necessary. High-power ultrasound can reduce the viscosity of heavy oil to increase its fluidity. This technology has the advantages of low cost and no harm to the environment, and has a good development prospect in the application of heavy oil cold transportation. This paper studies the ultrasonic viscosity reduction technology for heavy oil, and designs the ultrasonic viscosity reduction system based on the analysis of the ultrasonic viscosity reduction mechanism, including the parameters, materials, structure design of the ultrasonic transducer and the circuit design of the ultrasonic generator. The ultrasonic viscosity reduction system was tested on the indoor test platform, and the viscosity reduction effect and influencing factors of the system were analyzed through the test. The experimental results show that the viscosity reduction rate of heavy oil samples can reach more than 40% irreversibly after the system is applied to the heavy oil samples for 20 minutes at room temperature, and the same viscosity reduction effect can be achieved only by using water bath heating method, which requires the water temperature to be above 60°C. Therefore, ultrasonic viscosity reduction system has more advantages than the traditional heating viscosity reduction method, which provides a valuable reference for the application of ultrasonic viscosity reduction technology.
目前重油管道输送主要采用加热输送技术,能耗大,还可能造成冷凝事故。因此,管道重油冷输技术的研究与应用是非常有必要的。高功率超声可以降低稠油的粘度,增加稠油的流动性。该技术具有成本低、对环境无危害等优点,在重油冷运输应用中具有良好的发展前景。本文对重油超声降粘技术进行了研究,在分析超声降粘机理的基础上,设计了超声降粘系统,包括超声换能器的参数、材料、结构设计和超声发生器的电路设计。在室内测试平台上对超声波降粘系统进行了测试,通过测试分析了系统的降粘效果及影响因素。实验结果表明,该系统在室温下作用于稠油样品20分钟后,稠油样品的降粘率可不可逆地达到40%以上,而只有采用水浴加热的方法才能达到相同的降粘效果,这需要水温在60℃以上。因此,超声波降粘系统比传统的加热降粘方法具有更多的优点,为超声波降粘技术的应用提供了有价值的参考。
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引用次数: 0
期刊
2022 4th International Conference on Intelligent Control, Measurement and Signal Processing (ICMSP)
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