Absolute optical imaging position encoder

Wang, Han; Wang, Jin; Chen, Bin; Pan, Xiao; Chen, Xin; Cai, Nian; Ling, Bingo Wing‐Kuen

doi:10.1016/j.measurement.2015.02.028

Cited by 46 publications

(17 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An absolute optical imaging position encoder has been established in our previous work [8,25]. The architecture of our established AE system consists of a complementary metal oxide semiconductor (CMOS) sensor, a beam splitter, an eyepiece, an objective lens, a collimation lens, a light source and a glass gratings substrate with absolute coding patterns (as shown in Fig.…”

Section: Architecture Of Our Established Absolute Imaging Position Enmentioning

confidence: 99%

“…Also, their measurement accuracies are generally low. To improve the measurement accuracy, we have established a novel absolute optical imaging position encoder in [8]. In this encoder, absolute position coding images (APCIs) can be obtained with grating lines.…”

Section: Introductionmentioning

confidence: 99%

“…In a word, although these existing methods achieve good results in specific application areas, they are unsuitable to detect the edges of the APCI under the conditions of heavy noise and bad illumination in the AE system. We have proposed an edge detection method to detect the edges of the ACPI in our established AE system [8]. We calculated the number of white and black pixels in each column in the binary APCI.…”

Section: Introductionmentioning

confidence: 99%

“…Finally, the second derivate of the vertical projection contour is applied to obtain the accurate edges in each interval. Obviously, our novel method is free from binarysation, which is an important step in our previous work in [8]. Besides, since the EMD method is based on the direct detection of the envelop of a signal, the proposed method is free from empirical parameter setting.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Improving the measurement accuracy of an absolute imaging position encoder via a new edge detection method

Cai

Pan

et al. 2017

IET Science, Measurement & Technology

Self Cite

View full text Add to dashboard Cite

Section: Architecture Of Our Established Absolute Imaging Position Enmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Improving the measurement accuracy of an absolute imaging position encoder via a new edge detection method

Cai

Pan

et al. 2017

IET Science, Measurement & Technology

Self Cite

View full text Add to dashboard Cite

“…Similarly, the authors of Reference [ 17 ] employ different color gradients to determine the rotational angle. The authors of Reference [ 18 ] present the solution for data processing to improve on capture image contrast and thus improve both the low light and the high-speed performance.…”

Section: Introductionmentioning

confidence: 99%

Fast and Reliable Alternative to Encoder-Based Measurements of Multiple 2-DOF Rotary-Linear Transformable Objects Using a Network of Image Sensors with Application to Table Football

Bošnak

Klančar

2020

Sensors

View full text Add to dashboard Cite

Simultaneous determination of linear and angular positions of rotating objects is a challenging task for traditional sensor applications and a very limited set of solutions is available. The paper presents a novel approach of replacing a set of traditional linear and rotational sensors by a small set of image sensors. While the camera’s angle of view can be a limiting factor in the tracking of multiple objects, the presented approach allows for a network of image sensors to extend the covered area. Furthermore, rich image data allows for the application of different data processing algorithms to effectively and accurately determine the object’s position. The proposed solution thus provides a set of smart visual encoders emulated by an image sensor or a network of image sensors for more demanding spatially distributed tasks. As a proof of concept, we present the results of the experiment in the target application, where a 1.6 MP image sensor was used to obtain sub-degree angular resolution at 600 rpm and thus exceeding the design parameters and requirements. The solution allows for a compact, cost-effective, and robust integration into the final product.

show abstract

Automatic real-time adjustment of pulse signal of incremental photoelectric encoder

Zhao

Wan

et al. 2017

Opt Rev

View full text Add to dashboard Cite

Absolute optical imaging position encoder

Cited by 46 publications

References 21 publications

Improving the measurement accuracy of an absolute imaging position encoder via a new edge detection method

Improving the measurement accuracy of an absolute imaging position encoder via a new edge detection method

Fast and Reliable Alternative to Encoder-Based Measurements of Multiple 2-DOF Rotary-Linear Transformable Objects Using a Network of Image Sensors with Application to Table Football

Automatic real-time adjustment of pulse signal of incremental photoelectric encoder

Contact Info

Product

Resources

About