共查询到18条相似文献,搜索用时 125 毫秒
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本文分析了一种采用光波长编码方式工作的机载光纤位移传感器工作原理,针对其中的变栅距光栅的栅距变化规律进行了理论研究,介绍了栅距变化按等差级数、等比级数和幂级数逼近规律变化等四种情况;证明栅距变化规律为等比级数时,位移与一级衍射光中心波长呈简单的线性关系,是理想的栅距变化规律;最后探讨了各种栅距变化规律下由光波长推算位移的方法。 相似文献
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本文分析了一种采用光波长编码方式工作的机载光纤位移传感器工作原理,针对其中的变栅距光栅的栅距变化规律进行了理论研究,介绍了栅距变化按等差级数、等比级数和幂级数逼近规律变化等四种情况;证明栅距变化规律为等比级数时,位移与一级衍射光中心波长呈简单的线性关系,是理想的栅距变化规律;最后探讨了各种栅距变化规律下由光波长推算位移的方法. 相似文献
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本文针对提高变栅距光栅位移传感器动态响应的问题,提出了传感器几种位移解算方案,并从解算时间、影响解算精度的主要因素等方面进行了分析.通过计算与对比,最终确定以综合回归法作为在传感器工作中的应用方案,并对综合回归法的参数进行了优化. 相似文献
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1 前言光栅位移传感器是一种高精度位移测量装置,在精密测量和机床工业中得到广泛应用.用光栅进行位移测量时,若以光栅的栅距直接作为计量单位,则要提高光栅的分辨率就必须提高栅线的密度,这将受到多种因素的限制,为此,人们广泛采用的方法是在选择合适的光栅栅距的前提下进行“细分”。本文提出一种利用微处理机采集光强随位移改变时的模拟电压信号,通过 A/D 转换进行细分和辨向的方法。 相似文献
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针对时栅位移传感器网络化通信的要求日益提高,提出了一种基于μC/OS-Ⅲ和LwIP时栅位移传感器多模式网络接口设计方案。根据时栅位移传感器的特点,该系统采用基于Cortex-M4内核的微控制器STM32F407ZGT6硬件平台,利用μC/OS-Ⅲ实时操作系统和LwIP轻量型网络协议栈的特点,选择以太网、Wi-Fi、4G作为互联网通信多模式网络接口,建立各传感器之间的联系,完成时栅位移传感器产品的后台服务终端。实验结果表明,该设计能够实现远程故障诊断和校验,提高时栅位移传感器智能化和数字化水平,促进时栅产业化。 相似文献
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Micro-measurement using grating microscopy 总被引:2,自引:0,他引:2
In this paper, two quantitative methods to measure micro-deformation using grating microscopy are proposed, a grating diffraction method and a full-field grating phase-shift method. A compact optical transmitting microscope with white light source is reconstructed by developing a loading and recording system. For direct strain measurement, a grating diffraction method is presented. With the help of a Bertrand lens, the Fourier spectrum of the grating is formed on the CCD sensor plane with high image quality. Software for precise, fast and automatic determination of the diffraction spot centroids is developed. Local strains are thus measured with high resolution. For the deformation measurement, a phase-shifting grating microscope method with high sensitivity and spatial resolution is proposed. Phase-shifting is based on the slab refraction effect and is realized via a tilting compensator. The system possesses a high spatial resolution (1 μm), and a displacement precision of 0.1–0.03 μm. The combination of the grating diffraction method and the phase-shifting method in the same test provides simultaneous measurement of strain and displacement, thus demonstrating that the grating techniques are viable in the microscope environment. 相似文献
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为了检定高准确度位移传感器、几何量计量定位、微细加工测量,同时,也测量那些可以转换为微位移或光程差的其它物理量。基于双光栅干涉仪原理,设计了一种数字式位移传感器,对该装置进行了理论分析和计算机模拟,实验验证:该测量装置的绝对误差不大于0.019μm。 相似文献
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The design of a micro optical motion sensor is proposed. Fourier series analysis is used to determine the optical transmission
function (OTF) of gratings. The optical flux generated by a grating (pair) and received by photodetector is then calculated
through an integration of the OTF over the receiving window. A general relationship between photo-detector output current
and grating translation displacement is finally established. The analysis is carried out for linear binary grating sensors,
with single and double grating sensors. The influence of grating (pair) structure and receiving window on sensor sensitivity
and linearity of output response is investigated. A numerical work is completed to simulate the various cases of optical structure
design. Several types of photoresist gratings are fabricated and are used to experimentally characterize the grating sensor.
The tested result is found to be in general agreement with the analysis result. 相似文献
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实验将新型光栅传感器应用于微位移测量之中。通过比较线(角)位移与莫尔条纹移动个数之间的关系,实验发现,在微位移测量中光栅传感器具有极好的线性度(R2≥0.999)和精确度(误差≤2.0%)。实验验证了光栅传感器在微位移测量中可行性和可靠性。 相似文献