滚筒式车速表检验台在线自动标准装置

该装置能够对滚筒式车速台滚筒的带动,实现30km/h、40km/h、60km/h的控制,实时测量转速值,采集滚筒式车速表检验台的速度,并将两者速度进行比较;能够直观地将采集到的速度、转速、波形图显示在触摸屏上,便于观察和比较;装置的相对扩展不确定度为0.6%,可以方便、快速、准确地对滚筒式车速表检验台进行检定校准。

标准玻璃线纹尺自动校准装置的测量不确定度评定

标准玻璃线纹尺自动校准装置采用机器视觉和图像处理技术,实现0.01mm分度和0.1mm分度标准玻璃线纹尺的全自动校准。本文介绍了标准玻璃线纹尺自动校准装置的结构原理及标准玻璃线纹尺的校准方法,对校准标准玻璃线纹尺基本误差的测量不确定度进行了评定,并分析计算了由图像分辨率、CCD分划误差、重复性等方面引入的不确定分量。

一种高量程压力传感器的自动校准装置

多年来,对于高量程压力传感器的校准,人们大多采用活塞式压力计。使用这种方法需要人工搬运法码、人工读数、手工计算,不仅效率低下、劳动强度大,而且耗费人力物力。国内外市场有一些自动校准设备,但是由于其压力介质采用气体,只能解决小于20MPa的压力传感器的自动校准。所以,长期以来人们迫切需要一种用于高量程压力传感器自动校准的装置。

(ADR3000)0.01级交直流指示仪表标准装置的研制方法

本装置将通过研制高稳定电源,了解各仪表生产厂家的标准通讯规约,配合0.01级标准表实现标准仪表和仪表装置的自动化检定。

Multi-Criterion Optimal Design of Automotive Door Based on Metamodeling Technique and Genetic Algorithm

A method for optimizing automotive doors under multiple criteria involving the side impact, stiffness, natural frequency, and structure weight is presented. Metamodeling technique is employed to construct approximations to replace the high computational simulation models. The approximating functions for stiffness and natural frequency are constructed using Taylor series approximation. Three popular approximation techniques,i.e.polynomial response surface (PRS), stepwise regression (SR), and Kriging are studied on their accuracy in the construction of side impact functions. Uniform design is employed to sample the design space of the door impact analysis. The optimization problem is solved by a multi-objective genetic algorithm. It is found that SR technique is superior to PRS and Kriging techniques in terms of accuracy in this study. The numerical results demonstrate that the method successfully generates a well-spread Pareto optimal set. From this Pareto optimal set, decision makers can select the most suitable design according to the vehicle program and its application.

不断开发新产品,适应计量市场需求——余通公司高新技术发展战略点滴

本文着重介绍LCS型液氯电子称量装置、TYLM自动化标准链码装置、WFJ-F/S称重数据无线发射与接受装置、智能型耐高温电子称量装置及装卸料仓自动称量装置等中小型计量产品,旨与同行共同交流探讨,不当之处恳与指正。