Effect of Tilt Angle of Surface to be Measured on Differential Confocal Microscope Pointing Signal

普通共焦显微镜的轴向响应特性,因受到被测量表面的倾斜角影响引从而起轴向响应特性变化,而应用差动共焦光学系统对超精密加工的表面进行瞄准测量时,差动系统的瞄准信号也受到影响,并进而影响到测量系统对加工表面的测量精度及分辨特性。通过对差动共焦测量系统输出信号理论模型的分析得出被测量面的倾斜角变化不影响差动共焦输出信号零点位置;倾角在一定范围内变化时不影响瞄准测量分辨力的结论,并给出了实验分析结果。The axial response of conventional confocal microscope is affected by the tilt angle of the surface to be measured.When the ultra-precisely machined surface is measured with pointing method based on the differential confocal microscope,the tilt angle of the surface to be measured influences the pointing signal,as well as the measuring accuracy and resolution of the treated surface.On the basis of the analysis of the theoretical model of the output signal of differential confocal microscope,it is concluded that the zero point is independent of the tilt angle of surface to be measured and the resolution of the pointing signal is not affected with the tilt angle in a certain range.The experimental results are also presented

Simulate and Analysis the Performance of the Adjust Focus Voice-coil Actuator in Measuring Ptical Path

对测量光路中调焦音圈电机的特性进行了分析,通过对音圈电机特性的仿真,定性分析音圈电机设计参数对电机特性的影响情况。从建立音圈电机的数学模型出发,利用仿真软件SIMulInk实现音圈电机的建模、特性仿真。得到仿真结果后,通过适当调整电机的设计参数,分析电机特性的变化。仿真结果表明,音圈电机动子质量、磁钢磁密等参数的变化都对电机的响应时间、平稳性、稳态误差有较大的影响。在原设计的基础上,可适当地增加电机动子的质量以及磁钢磁密来减小响应时间和稳态误差。这些分析结果为音圈电机的加工、测量基础光路中调焦功能的实现奠定了基础。In order to analyzing the actuator characteristics effected by the motor design parameters,a way of simulating the characteristics of voice coil actuator by simulink was introduced.From the established mathematical model of voice-coil actuator, the model of voltage and displacement, voltage and speed,force and displacement was established.The simulation software simulink was used to realize the modeling and simulation of the voice-coil actuator, to get the result of simulation.Then, changed the design parameters, such as the quality of the actuator, or the flux density and so on, to observe the change of the system performence.Analyzing Results showed that, the changes of actuator quality and flux density and other parameters have great influence on the response time, stability and steady-state error of the actuator.In order to reduce the response time and the steady-state error of the actuator, the quality of actuator and the flux density was increased based on the original design.These analysis results build the basis for the processing of voice-coil actuator and the realization of the function of adjust focus in optical path.福建省青年人才基金项目(2006F3125);福建省科技计划重点项目(2007H0034);福建省新世纪优秀人才支持计划资助项

Present Situation and Developmental Tendency of ball-pressure test indentation size Measurement

从球压试验压痕尺寸的传统测量方法、压痕尺寸测量的新技术两个方面对该领域的国内外研究进展进行了综述,总结了有代表性的研究成果并指出其未来的发展趋势。The present status of ball-pressure test indentation size measurement research is summarized through the following two aspects: the conventional ball-pressure test indentation size measuring method and new techniques of ball-pressure indentation size measuring.Finally,trend of development is pointed out

The designation of manual-folding transferring implement

针对手术活动中运送病人的环节,从最大限度地减轻病人痛苦的角度出发,结合目前医院的实际要求,基于应用机械工程学原理提出手摇式可折叠移动过床器的设计概念。本过床器采用差速千斤顶,平行四杆机构以及可折叠床架三个基本核心结构具有易操作,安全性高,占用空间少的优点。本过床器具有一定的实际应用价值。Give a summarization and manifestation to the contemporary utilization of implements that are aimed to transfer patients.Meanwhile,indicated the problems that are existed in those implements.Bring out the layout of the manual-folding transferring implement,which consist of three mechanical instructions as two differential elevators,a four-bars parallel instruction and a basic folding instruction,depending on all of which the manual-folding transferring implement can be used to transfer patients in the iatrical institutions.Furthermore,this mechanical implement has been very testified by a series of theory in mechanics such as the theory of strength and the theory of rigidity

Design of Embedded Chinese Input Method Based on Qtopia

在此主要讨论一个中文拼音输入法在QTOPIA中的设计,利用QTOPIA所提供的插件技术,完成拼音输入法的实现。输入法实现的数字到汉字的转换主要分为两个步骤,即数字拼音到汉语拼音的转换和汉语拼音到汉字的转换。该输入法具有机器学习的功能,可以通过自然学习接受用户自定义的词语,大大提高了输入速度和智能程度。该方法在笔者的开发平台上验证通过。The design and implementation of a Chinese inputmethod based on Qtopia,the Pinyin input method have been realized by using the Qtopia utilizing plugc-in architecture technology,two main steps are involved to transform digital keyboard input to Chinese characters.One is the transform from digital string to Pinyin string,another is the transform from Chinese Pinyin string to Chinese characters.The input method has the functions of machine learning,words acception and expressions which are defined by the users through natural learning,which greatly enhance the inputting speed and the degree of intelligent

Simulation of temperature field of graphene substrate fabricated by laser chemical vapor deposition

为了分析激光化学气相沉积制备石墨烯过程中催化剂基底的静态和动态温度场分布与各个实验参量之间的关系,采用基于AnSyS软件建立有限元分析模型和加载532nM激光热源模型的方法,取得了不同实验参量影响下基底温度场分布和达到反应温度所需时间的数据。结果表明,在基底材料属性、激光功率大小、基底面积尺寸、聚焦光斑直径、反应气体流量的影响下,基底静态温度场的分布与达到反应温度所需时间均不同,可作为制备高质量石墨烯实验的参考依据。采用波长为532nM、功率为3W、聚焦光斑直径为50μM、移动速率为1MM/S的连续型激光器,以镍箔为基底材料,在标准状态下甲烷和氢气流量分别为10M l/MIn和5M l/MIn条件下仿真得到的动态温度场符合激光化学气相沉积法制备图案化石墨烯的生长机理。In order to analyze the relationship between static and dynamic temperature field distribution of catalyst substrate and various experimental parameters in graphene fabrication with laser-induced chemical vapor deposition,the finite element model was established by using ANSYS software and 532 nm laser model was loaded as the heat source.The data of temperature field distribution and the needing time for achieving reaction temperature under different parameters were obtained.The results show that under the influence of the property of substrate,laser power,the size of substrate area,the focus spot diameter and the reaction gas flow,the substrate temperature field distribution and the needing time for achieving reaction temperature are different.It can be used as the reference in high quality graphene fabrication experiment.The dynamic temperature field distribution under the conditions of continuous wave laser( wavelength of 532 nm,power of 3W,focused spot diameter of 50μm,movement speed of 1mm / s),nickel foil substrate,10 m L / min methane and 5m L / min hydrogen conforms to the pattern graphene growth mechanism fabricated by laser chemical vapor deposition.教育部留学回国人员科研启动基金资助项目; 福建省新世纪优秀人才支持计划资助项

基于多参数融合的铅酸蓄电池SOC估算方法研究

铅酸蓄电池荷电状态(state of charge)是电源管理系统中的重要参数,准确估算蓄电池荷电状态具有重要意义。现有铅酸蓄电池荷电状态估算方法存在不适用于实际行车环境、易受干扰、计算精度低等缺陷。在开路电压法与安时积分法结合的基础上提出一种改进SOC估算方法,研究结合多个参数并引入权值w的SOC初始化算法,在SOC估算过程中根据实时温度校正电池容量,可以提高计算精度,符合工况。实验结果表明:此SOC估算方法具有很好的鲁棒性,最大估算误差小于3%

深度学习在电力负荷预测中的应用

针对电力负荷预测中存在的随机性、不确定性的问题,结合深度学习算法具有很强的自适应感知能力等特点,采用目前较为主流的深度学习方法,如长短时记忆(LSTM)网络、门循环单元(GRU)神经网络和栈式自编码器(SAE),分别研究其应用于电力负荷预测时的效果。研究发现,将历史负荷数据作为三种深度学习预测模型的输入时,三种预测模型的负荷预测精度指标评估结果各有不同。因此,为了全面评估三种预测模型的预测效果,提出将不同时间段内的相同历史负荷数据作为预测模型输入对比各模型的负荷预测精度,从中找出最佳的预测模型。仿真结果验证了三种预测模型在电力负荷预测应用中的可行性,且发现在单输入因素时LSTM模型的预测精度相对较高。因此,在后续研究中,可以考虑以LSTM预测模型作为基础预测模型,结合更多的负荷影响因素进行改进,以提高负荷预测精度

Focus facula measurement in graphene preparation by laser chemical vapor deposition

激光化学气相沉积(Laser Chemical Vapor; Deposition,LCVD)石墨烯制备受聚焦光斑影响很大。实时检测光斑,可实现石墨烯LCVD; 法可控制备。设计聚焦光斑测量光学系统,提出一种基于圆拟合的改进算法检测光斑中心和半径,计算、标定光斑面积。该方法在圆拟合基础上加入了二值化、形态; 学处理及连通性判别等预处理方法。实验表明,该方法测得圆心位置与真值误差平均为5. 58 pixel,光斑面积与真值误差平均为1. 93 *; 10~(-9) m~2,优于传统的重心法和霍夫检测法,具有较快的计算速度和检测精度,可实现LCVD; 法制备石墨烯实验中聚焦光斑的非接触式测量,且对其他激光加工工艺的质量控制有借鉴意义。The preparation of graphene by laser chemical vapor deposition(LCVD) is; highly affected by the focal spot. Real-time measurement of light spot; can be realized controllable preparation of graphene by LCVD method. The; measuring optical system of focal facula was designed,and an improved; method based on circle fitting method was presented to detect center and; radius of focal spot, then focal spot area was calculated and; calibrated. This method introduces some pretreatment methods, such as; binaryzation,morphology processing, connectivity discrimination.; Experiments show that the measured center position has average error of; 5. 58 pixel with true value, spot area has average error of with true; value. It is better than the traditional gravity method and Hough; algorithm and has faster computing speed and precision,which can realize; non-contact measurement of the focus facula, and this study is of; significance for quality control of other laser processing technology.国家自然科学基金项目; 福建省科技计划重大专

智能电表运行状态评估技术研究综述

智能电能表运行状态评估包括可靠性分析、电能表故障分析以及电能表可靠性寿命预计；针对目前智能电能表运行状态评价研究所必须面对的问题，对当前应用于智能电表状态评估的质量评价方法、异常分析和故障预测算法、寿命预测算法等内容进行了梳理和对比，盘点智能电表运行状态评价技术的研究现状和最新研发进展；最后从智能电表数据特点的角度阐释了目前应用算法的特点和不足，并探讨了研究基于多源数据融合技术的智能电表运行状态评估技术的必要性、可行性和努力方向，为智能电表数据数据分析技术和状态评估技术提供可靠的借鉴意义。国家电网公司科技项目资助（基于多源数据融合的智能电能表运行状态评价技术研究及应用)（JL71-16-006