共查询到17条相似文献,搜索用时 718 毫秒
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旋转角加速度测量是对旋转系统进行状态检测和故障分析的重要手段,由此提出了一种基于电磁感应原理的新结构角加速度传感器。对三相异步电机、单相异步电机和自制无槽转子的三相异步电机进行了实际的角加速度测试。实验表明,当旋转系统存在瞬间角加速度时,经过电磁耦合立刻以传感器输出绕组感应电势的形式表现出来,可以直观反映出各种旋转机械系统的角加速度变化情况。另外对传感器实际工作状态存在的误差及来源进行了分析,并对传感器的输出特性和传递函数进行了推导,为传感器的推广应用提供了有效的技术支撑。 相似文献
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研制了一种新型旋转角加速度传感器校准装置。校准装置包括外定子、杯形转子和内定子,其中外定子两相绕组的轴线正交,输入的两相交流电错开90°相位差,产生旋转磁场后驱动杯形转子产生变化的角加速度量值;推导了角加速度量值的理论公式,给出公式所需参数的获取方法;最后采用光栅测角加速度系统对校准装置的特性进行了测定,结果表明装置产生的角加速度量值线性误差约为0.53%。 相似文献
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电子细分是光栅位移传感器实现纳米级分辨率测量的关键,细分误差由细分方法和光栅信号质量共同决定。针对信号实时修正方法在小步距测量和一些复杂工况环境下的局限性,从提高细分方法对非理想光栅信号的适应性的角度出发,提出了基于信号比值线性化的新型电子细分方法,构建了2种实时补偿信号以进一步提高信号的线性度;详细阐述了所提细分方法的细分原理,分析了其在非理想光栅信号输入情况下的细分误差;实现了最高为0.003μm的理论细分精度和0.08μm的实际细分精度。数值仿真和对比实验结果表明,所提细分方法对非理想光栅信号的适应性明显优于常用的反正切细分法和正余弦绝对值相减细分法。 相似文献
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一种采用宽动态范围位移传感器的新型圆度仪的研究 总被引:1,自引:0,他引:1
本文介绍了一种新型的圆度仪,它采用的位移传感器以全息柱面衍射光栅为标准器,动态范围宽,分辨率高,可进行圆度误差、波度及表面粗糙度的综合测量,比一般的圆度仪有更多的功能。本文介绍了传感器的原理、数字滤波、圆度误差的评定方法以及检定与实测结果. 相似文献
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Quality and resolution of integrated microsystems using Hall sensors dedicated to an angular encoder are strongly dependent on the accuracy of the relative position of Hall sensors and on the offset of electronic front end circuitry. In this paper, we describe a CMOS microsystem built on two integrated circuits. This contactless encoder microsystem gives three sine and square signals with a phase shift of 120/spl deg/ and provides an angular error of less than 4/spl deg/ without external trimming or feedback. The Hall sensor assembly with the engine consists of fixing a small permanent magnet on the rear axis of the motor. Then, the sensor is positioned in front of this magnet. 相似文献
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提出了一种自动测量光栅栅距修正累积误差的方法。栅距测量是基于高阶累积量估计光栅传感器输出的两路莫尔条纹信号的时间延迟而得到的,该方法能够实现每个栅距的测量,通过对每个光栅栅距的误差进行修正来减少累积误差,为大量程高精度测量奠定了基础。实验采用长为500 mm的50线/mm的光栅传感器,该传感器包含栅线25 000条,实现栅距测量分辨力为3 nm,达到了纳米级测量。该方法抗干扰能力强,适合在生产现场应用。 相似文献
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Podanchuk D Kurashov V Goloborodko A Dan'ko V Kotov M Goloborodko N 《Applied optics》2012,51(10):C125-C132
A holographic wavefront sensor based on the Talbot effect is proposed. Optical wavefronts are measured by sampling the light amplitude distribution with a two-dimensional (2D) precorrected holographic grating. The factors that allow changing an angular measurement range and a spatial resolution of the sensor are discussed. A comparative analysis with the Shack-Hartmann sensor is illustrated with some experimental results. 相似文献
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Autofocus laser rotary encoder 总被引:1,自引:0,他引:1
A laser incremental encoder with autofocus operation isproposed. In the encoder, an optical read head focuses three laserbeams upon a disk with a scaling grating. The scaling grating is areflection grating for which the height difference between adjacentpixels is one quarter of the wavelength of the laser. Each of thetwo laser beams is focused onto one of the two sections of thereflective grating, whereby the pitch of the grating can be detected byinterferometric reflection. The third beam acts to provideautofocus and is reflected from a smooth part between the two sectionsof the reflective grating. Therefore the encoder is less sensitiveto the gap between the optical read head and the scaling grating, andno precision adjustment is required. Also, the reading data arefree from the vibration and waviness of the grating surface. In theexperiments an encoder disk was fabricated from a wafer by lithographictechniques. The encoder with an 18-mm radius of the disk can reacha resolution of 2(16) = 65,536 pulses per revolution withoutelectronic interpolation. 相似文献
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Hopp D Pruss C Osten W Seybold J Fritz KP Botzelmann T Mayer V Kück H 《Applied optics》2011,50(26):5169-5177
Rotary sensors are an essential component in numerous applications where a rotation movement has to be detected. With optical encoders, a high angular resolution can be achieved. As a disadvantage, the resolution enhancement is associated with increasing cost. To overcome this issue, a coding principle is presented that uses a diffractive solid measure on a microstructured plastic disc. Like a DVD, this encoder disc can be manufactured in a cost effective injection molding process. For this approach, a differential incremental code, as well as an absolute code, has been developed. 相似文献