共查询到20条相似文献,搜索用时 125 毫秒
1.
爆炸容器动态径向变形非接触测量技术 总被引:1,自引:0,他引:1
基于激光多普勒效应的动态测量技术具有精度高、信噪比高、动态响应快、线性好、量程范围大和非接触等优点.为获得爆炸容器径向变形参数,设计非接触激光多普勒纵向位移测量系统.采用外差式光路结构,实现被测目标运动方向的辨别,提高抗干扰能力;利用高斯光束理论和束腰特性优化光路结构,使高斯光束束腰聚焦在爆炸容器被测表面上,实现最小聚焦光斑,提高光信号的强度和信噪比;根据爆炸容器径向变形的特点,研究相应的数字滤波和频谱分析方法,实现高速变化位移的动态测量.系统的位移测量范围为-30 mm~+30 mm,速度变化范围为-10 m/s~+20 m/s,测量距离为4.5 m.爆炸容器在内部爆炸载荷作用下的径向变形测试结果表明测试系统性能是可靠的. 相似文献
2.
从激光式测量和影像式测量这两大类非接触测量出发,运用非接触测量机开展测量工作,得到了一个完整的非接触测量流程,并且对测量不确定度进行了分析,最终建立了一套完整的非接触测量规范,并通过相关的实验验证了该规范的可行性。 相似文献
3.
分析了容器内部为气相介质和液相介质两种情况下容器壁中超声波余振信号的衰减特性,在此基础上提出了基于容器壁上超声波余振信号衰减检测原理的一种新的超声波容器定点液位检测的方法,并介绍了其原理和实施方案。该方法为非介入测量方式,探头只需附着于容器壁外,安装极为简单,且具有灵敏度高、可靠性好等优点,极适合于高压容器,腐蚀性液体容器的定点液位检测与报警。 相似文献
4.
非完整圆弧半径测量方法综述 总被引:1,自引:0,他引:1
论述几种常用非完整圆弧半径测量方法的测量原理、特点、精度、应用场合等方面的问题,最后指出:在线测量、非接触测量是今后非完整圆弧半径测量的主要发展趋势. 相似文献
5.
6.
本文介绍非接触测量中三角法测量原理探讨非接触测量在零件品质分析方面应用的方法,并举例说明了Geomagic在这方面的工作步骤,以及必须注意的相关事项。 相似文献
7.
一种用于表面形貌测量的复合测量位移传感器,它将接触式触针传感器和非接触式光学传感器巧妙融合在一起,使得一个表面形貌测量位移传感器同时具备接触和非接触两种测量手段。其特点是利用了一个触针-反射镜测杆机构,将激光聚焦光束直接在被测工件表面扫描转换为对测杆上固接的反射镜扫描。其垂直测量范围1mm,垂直测量分辨率5nm。该传感器工作稳定可靠,使用灵活,可广泛用于研究机构和工业现场等进行表面形貌测量。 相似文献
8.
9.
针对航空发动机中薄壁细长轴类零件的壁厚需要精密高效测量的问题,提出了一种双测头快速高精度测量方法。该方法以大长径比碳纤维测杆支撑小型非接触光学测头进行细长轴内壁测量,以龙门式框架安装接触式测头同时进行细长轴外壁测量,并采用高精度气浮平台作为工作台带动零件移动,从而实现对细长轴类零件的壁厚进行测量。采用该方法研制了测量设备,并详细介绍了机械、电控和软件设计。通过实验和第三方检测,该测量设备可对长度1 500 mm、内孔直径14 mm的细长轴进行壁厚测量,验证了本方法的有效性。 相似文献
10.
本文介绍一种纸张厚度非接触测量技术,其传感器由气动位移传感器和变压器式位移传感器复合而成,该系统不受纸张水份,灰份及密度的影响,具有较高的测量精度,为非金属厚度的非接触测量提供了新手段,文章还对实验结果进行了分析。 相似文献
11.
《Measurement》2016
In creep-feed grinding research, it is vital to measure surface temperature of workpiece in order to optimize process parameters, prevent potential thermal damage, improve the surface integrity of workpiece and provide reference for modelling of grinding. Various measurement techniques for grinding temperature have been developed by using thermocouples and infrared radiation techniques. However, some inevitable problems still exist with slow response, strong noise interference and high sensibility to coolants. In order to obtain precise and reliable temperature of workpiece surface during grinding, an in-situ infrared technique is designed by focusing on the back surface of workpiece. With the help of a two-dimensional sliding table, the focus of infrared thermometer can be adjusted to the small hole in the workpiece to measure grinding temperature accurately. This method can avoid the high-frequency signal interruption of mechanical vibration and electrical noises, since the measurement is contactless and has signal shielding. The procedures to set up the measurement facility and measure grinding temperature are described in this paper. This paper also includes the analysis of measurement results of grinding temperature. Compared with other measurement techniques, this method is not affected by mechanical vibration and grinding fluids. By using infrared technology, this method can measure accurate grinding temperature with a fast response. 相似文献
12.
13.
14.
15.
16.
17.
18.
Taewon Kang 《Journal of Mechanical Science and Technology》2008,22(4):621-627
In order to understand the blood vessel of artery responding to medical treatments, there is a need to quantify the biomechanical
behavior of the vessel. Using video dimension analyser, mechanical pressure-diameter relationships of passive carotid artery
with and without balloon inflated at various axial loads were measured. Inversion test was also analytically modeled to address
the heterogeneity of artery due to constituents. The pressure-diameter curves and stress distribution across the arterial
wall were calculated. The simulation showed that the inversion tests, in comparison to other mechanical tests, provided additional
information to develop the strain energy function describing arterial behavior 相似文献
19.