自动化包装机械计量装置的原理与设计探讨

随着我国市场经济的不断发展,生产工艺已经成为整个市场环境下的核心之一。加强工艺技术的质量是当前社会主义经济发展中势在必行的重要课题。由于传统的生产工艺较为落后,在机械装置和精准计量上都存在很大的缺陷,不但严重影响社会发展,而且延缓生产效率。因此,采用自动化包装机械计量装置,则有效的解决了传统工艺上的缺失,既提高了生产效率,也使生产包装的工艺更加精美、更加完善,从而大力推动了社会主义经济效益。

智能制造环境下的机械加工计量检测技术研究

本文围绕智能制造背景下的机械加工计量检测技术进行探讨,采用智能传感器和大数据分析等手段,对机械加工过程中的尺寸、形状和表面粗糙度等关键参数进行实时监测和精准测量。研究结果揭示了智能制造环境下高效集成检测系统的构建方法,通过算法优化与系统自学习功能的实现,提升了检测系统的准确性和智能响应速度。此外,研究还证实了检测系统在故障预测、维护决策支持等方面的应用潜力,对推动智能制造的技术进步和生产效率有着积极的意义。

计量检测机械现场检定的现状分析及改进建议

从随车起重机、砝码、吊钩及其他附属装置等方面分析影响计量检测机械现场安全的不稳定因素。论述了保证量值准确传递、使检测仪能够可靠运行的改进建议。

机械产品检测中计量技术的应用研究

随着现代社会经济的快速发展,我国相关基础设施逐步完善和创新。我国工业的发展对机械产品的运用也越来越频繁,同时机械制造行业也快速发展。但是在实际的运用中,由于没有对相关机械产品进行准确的计量技术来对此进行检测,造成机械产品的质量不过关,造成了材料的浪费和经济的损失。

机械工业计量检定规程制定工作细则探讨

宣传贯彻《中华人民共和国计量法》,管理专用计量器具,使器具检定有据可循、有法可依。在检定方面,制定机械工业计量检定规程工作细则对加强机械工业单位测量具有重要作用,本文从三个方面对制定工作细则进行了论述。

基于故障因果链的故障模式与影响分析风险评估方法

传统故障模式与影响分析中的风险评估方法没有考虑故障模式发展过程,风险评估缺乏系统性,专家评价缺乏一致性。为提高故障模式与影响分析中风险评估的准确性和实用性,引入了故障因果链的概念。故障因果链作为风险评估对象,明确了风险优先数各因子的具体含义,改进了风险优先数的计算公式,系统地评估部件以及产品的风险。针对专家倾向于给出多粒度语言评价信息的问题,采用基本语言术语集统一输入的评价信息,然后采用依赖不确定性有序加权平均算子集结评价信息。最后,以机械隔膜计量泵维修策略决策过程为例,验证了所提方法的有效性和实用性。

采用扫描电镜和图像分析表征帘式涂布涂层中的孔隙结构和粘土取向

造纸行业对高速帘式涂布非常感兴趣,因为帘式涂布可以不使用与网接触的机械计量设备而达到生产高涂布量的涂布纸和纸板的目的。该具有计量功能的涂布工艺避免了很多在计量过程中与高剪切相关的问题和由此带来的缺陷。而且,帘式涂布可以形成覆盖率良好且均匀的涂层。尽管越来越多工厂使用帘式涂布工艺,但对帘式涂布形成涂层的结构特征的研究却很少。在此次研究中,我们将会分析商业化生产的帘涂牛卡纸和纸板的涂层结构,并使用横截面图像分析技术来表征涂层结构。对帘式涂布纸的结构参数如孔隙尺寸分布、颗粒取向以及涂层厚度的均匀性进行了评价,并与传统的刮刀涂布和膜涂布纸进行了对比。结果表明,帘式涂布形成的涂层结构具有更松厚且更多孔等优点。粘土粒子在帘式涂层中分布更均匀,这也表明了帘式涂布具有良好的涂布覆盖率以及涂层厚度均匀性。

Time series online prediction algorithm based on least squares support vector machine

Deficiencies of applying the traditional least squares support vector machine （LS-SVM） to time series online prediction were specified. According to the kernel function matrix＇s property and using the recursive calculation of block matrix, a new time series online prediction algorithm based on improved LS-SVM was proposed. The historical training results were fully utilized and the computing speed of LS-SVM was enhanced. Then, the improved algorithm was applied to timc series online prediction. Based on the operational data provided by the Northwest Power Grid of China, the method was used in the transient stability prediction of electric power system. The results show that, compared with the calculation time of the traditional LS-SVM（75 1 600 ms）, that of the proposed method in different time windows is 40-60 ms, proposed method is above 0.8. So the improved method is online prediction. and the prediction accuracy（normalized root mean squared error） of the better than the traditional LS-SVM and more suitable for time series online prediction.

A Statistical Parameter Analysis and SVM Based Fault Diagnosis Strategy for Dynamically Tuned Gyroscopes

Gyro's fault diagnosis plays a critical role in inertia navigation systems for higher reliability and precision. A new fault diagnosis strategy based on the statistical parameter analysis (SPA) and support vector machine (SVM) classification model was proposed for dynamically tuned gyroscopes (DTG). The SPA, a kind of time domain analysis approach, was introduced to compute a set of statistical parameters of vibration signal as the state features of DTG, with which the SVM model, a novel learning machine based on statistical learning theory (SLT), was applied and constructed to train and identify the working state of DTG. The experimental results verify that the proposed diagnostic strategy can simply and effectively extract the state features of DTG, and it outperforms the radial-basis function (RBF) neural network based diagnostic method and can more reliably and accurately diagnose the working state of DTG.

Parameters Influencing the Noise Emission of Planing Machines

Regarding woodworking machines, machine acoustics are of particular significance due to the high noise emission of these machines. Among other things, this can be attributed to the adoption of the European Commission Machinery Directive as a national law, which demands protection against noise emission in the design phase of new machines. In order to accomplish this, it is necessary to examine and locate the causes of emissions on existing machines. In this paper, the sound source is located through sound intensity measurements, using planing machines as an example, which are particularly noise-intensive woodworking machines. In addition, different influencing parameters on noise emission are analyzed, such as manual and automatic feed, rotational speed and the influence of the type of wood of the workpiece.

Innovative Production of PCMs （Phase Change Materials） Preparation by Vacuum Impregnation： Mechanical Strength of Mortars Cement with Composite PCMs Content

An experimental investigation was conducted to study the efficiency of thermal insulation of composite PCMs （phase change materials） produced by vacuum impregnation process between paraffin （PCMs） and fly ash particles. DSC （differential scanning calorimeter） has been used to determine the thermal properties of latent heat of melting and heat capacity for composite PCMs. Vacuum impregnation pressure of 40 in.Hg, paraffin melting temperature of 90℃, vacuum time and impregnation time of paraffin of 30 min are the optimum condition of composite PCMs productions. The values of latent heat of melting and heat capacity are 74.00 J/g and 15.726 J/g.℃ for composite PCMs that produces by the optimum condition in vacuum impregnation process. Increasing the amount of composite PCMs replacing for cement in mortars causes the compressive strength, flexural strength and tensile strength reduction. Compressive strength, flexural strength and tensile strength of mortar with and without composite PCMs can be increased by the longer time of water curing for mortar specimens. Thermal conductivity （k） of mortar cement is reduced by increasing the amount of composite PCMs which replaced for cement in mortar plate compositions. Composite PCMs have the efficiency for thermal energy insulation when incorporated into the buildings. Therefore, this property of paraffin/fly ash composites PCMs can reduce the energy consumption for temperature control in the buildings.

The impacts of stress on the chemical structure of coals:a mini-review based on the recent development of mechanochemistry

The chemical structure evolution of coal,which is important for understanding coalification and the accompanying volatile and possible oil generation,is generally thought to be influenced by temperature,time and confining pressure.Though evidence concerning the impacts of stress on the chemical structure has accumulated for many years and some hypotheses have been proposed,the mechanism remains controversial.Recent years have seen a breakthrough in mechanochemistry,which proves that stress can act on the molecule directly to initiate or accelerate reactions by deforming the chemical bonds.The progress in mechanochemistry gives researchers incentive to consider how stress works on the chemical structure of coals.Preliminary quantum chemical calculations have been performed on the macromolecule of anthracite to explain the mechanism of gas generation during the deformation experiments at low temperatures.This paper briefly reviews the evidence regarding the impacts of stress on the chemical structure of coals and introduces the recent achievements in the mechanism research.To further investigate this problem,more work should be undertaken by researchers from both geology and quantum chemistry fields.

Experimental investigation on cumulative propagation of thin film buckling under cyclic load

As instrument technology is needed for rapid determination of the smaller,thinner and lighter specimens,more stringent demands are related to thin films such as micro-electro-mechanical systems(MEMS),dielectric coatings and electronic packaging.Therefore,the requirement for testing platforms for rapidly determine the mechanical properties of thin films is increasing.Buckling of a film/substrate system could offer a variety of applications,ranging from stretchable electronics to micro-nanoscale metrology.In this paper,a fatigue-loading device has been designed to make the cyclic loading available for investigating the cumulative propagation of thin film buckling.The straight side buckling of thin compressed titanium film with the thickness of 50 nm deposited on organic glass substrates is investigated by using an optical microscope.The cumulative buckling propagation under the cyclic loading of a sequence of peak compression with the frequency 1 Hz is recorded by CCD camera.The buckling extension lengths are calculated by digital image measurement technology.

关于大型长度测量仪器操作人员职业划分的建议

从企业员工个人职业生涯的发展及企业科学管理水平提高方面考虑,需要对企业员工进行职业划分,在实际操作中长度计量工与机械检验工有时会混淆,本文对诸如三坐标测量仪、齿轮检查仪、圆度仪等大型长度测量仪器的操作人员的职业划分提出了一些建议,其目的是希望大家更多的关注企业的计量工作,提升计量技术管理水平,更好地服务于社会。

Entanglement concentration with strong projective measurement in an optomechanical system

In this work, we study an entanglement concentration scheme in a 3-mode optomechanical system. The scheme is based on phonon counting measurements, which can be performed through photon counting of an auxiliary cavity connected to the mechanical resonator. The amount of entanglement between the two cavity output modes is found to increase logarithmically with the number of detected phonons(photons). Such an entanglement concentration scheme is deterministic since, independently of the number of detected phonons(photons), the measurement always leads to an increase in output entanglement. Besides numerical simulations,we provide analytical results and physical insight for the improved entanglement and the concentration efficiency.

A sequence pulse counting method for shape measurement in dual-beam speckle interferometry

A temporal approach to fast shape measurement is presented.In principle,the rotational object method is used in combination with the sequence pulse counting method (SPCM) to determine the height of the object through calculating the related phase.Two specimens are tested to demonstrate the validity of the approach.One is an object covered by a Chinese character (tea) with a height variety of 0.3 mm,and the other is an object surface with a relatively large fluctuation of 3.5 mm.The experimental results are compared with mechanical measurements.An axis shifting method is also proposed to determine shapes with relatively large fluctuations.Effects of such parameters on the height measurement as incident angle of the dual light beams,tilting angle of the object,and azimuth angle of the measured point are discussed as well.