Implementation of Low Cost Stereo Humanoid Adaptive Vision for 3D Positioning and Distance Measurement for Robotics Application with Self-Calibration

2017 ◽  
Author(s):  
Abul Al Arabi ◽  
Rayhan Sardar Tipu ◽  
Mohammad Raihanul Bashar ◽  
Binoy Barman ◽  
Shama Ali Monicay ◽  
...  
Keyword(s):  
Low Cost ◽  
Distance Measurement ◽  
Self Calibration ◽  
3D Positioning

scholarly journals Metrological Challenges in Collaborative Sensing: Applicability of Digital Calibration Certificates

Sensors ◽  
2020 ◽  
Vol 20 (17) ◽  
pp. 4730
Author(s):  
Tuukka Mustapää ◽  
Pekka Nikander ◽  
Daniel Hutzschenreuter ◽  
Raine Viitala
Keyword(s):  
Low Cost ◽  
Industrial Applications ◽  
Digital Calibration ◽  
Self Calibration ◽  
Chain Link ◽  
Calibration Methods ◽  
Collaborative Sensing ◽  
Future Work ◽  
Metrology Infrastructure

IoT systems based on collaborative sensor networks are becoming increasingly common in various industries owing to the increased availability of low-cost sensors. The quality of the data provided by these sensors may be unknown. For these reasons, advanced data processing and sensor network self-calibration methods have become popular research topics. In terms of metrology, the self-calibration methods lack the traceability to the established measurement standards of National Metrology Institutes (NMIs) through an unbroken chain-link of calibration. This problem can be solved by the ongoing digitalization of the metrology infrastructure. We propose a conceptual solution based on Digital Calibration Certificates (DCCs), Digital SI (D-SI), and cryptographic digital identifiers, for validation of data quality and trustworthiness. The data that enable validation and traceability can be used to improve analytics, decision-making, and security in industrial applications. We discuss the applicability and benefits of our solutions in a selection of industrial use cases, where collaborative sensing has already been introduced. We present the remaining challenges in the digitization and standardization processes regarding digital metrology and the future work required to address them.

Low-Cost MEMS Accelerometers for Short Duration Micro ROV Distance Measurement

2013 ◽  
Vol 210 ◽  
pp. 280-286
Author(s):  
Bogdan Żak ◽  
Stanisław Hożyń
Keyword(s):  
Kalman Filter ◽  
Short Duration ◽  
Process Model ◽  
Low Cost ◽  
Distance Measurement ◽  
Filter Method ◽  
Gravity Compensation ◽  
Main Emphasis ◽  
Mems Accelerometers ◽  
Kalman Filter Method

In this paper the attempt to make an analysis of short duration Micro ROV distance measurement using low-cost MEMS accelerometers was presented. The main emphasis was placed on the gravity compensation and state estimation with Kalman filter method. The MEMS accelerometers error characteristics and the process model for measuring displacement of Micro ROV using accelerometers were presented. Finally, the examples of the verification results were performed.

scholarly journals THE POTENTIAL OF LOW-COST RPAS FOR MULTI-VIEW RECONSTRUCTION OF SUB-VERTICAL ROCK FACES

2016 ◽  
Vol XLI-B5 ◽  
pp. 909-916 ◽  
Author(s):  
K. Thoeni ◽  
D. E. Guccione ◽  
M. Santise ◽  
A. Giacomini ◽  
R. Roncella ◽  
...  
Keyword(s):  
Low Cost ◽  
Empirical Finding ◽  
Time Lapse ◽  
3D Models ◽  
Good Alternative ◽  
Rock Face ◽  
Self Calibration ◽  
Manual Adjustment ◽  
View Reconstruction ◽  
Rock Faces

The current work investigates the potential of two low-cost off-the-shelf quadcopters for multi-view reconstruction of sub-vertical rock faces. The two platforms used are a DJI Phantom 1 equipped with a Gopro Hero 3+ Black and a DJI Phantom 3 Professional with integrated camera. The study area is a small sub-vertical rock face. Several flights were performed with both cameras set in time-lapse mode. Hence, images were taken automatically but the flights were performed manually as the investigated rock face is very irregular which required manual adjustment of the yaw and roll for optimal coverage. The digital images were processed with commercial SfM software packages. Several processing settings were investigated in order to find out the one providing the most accurate 3D reconstruction of the rock face. To this aim, all 3D models produced with both platforms are compared to a point cloud obtained with a terrestrial laser scanner. Firstly, the difference between the use of coded ground control targets and the use of natural features was studied. Coded targets generally provide the best accuracy, but they need to be placed on the surface, which is not always possible, as sub-vertical rock faces are not easily accessible. Nevertheless, natural features can provide a good alternative if wisely chosen as shown in this work. Secondly, the influence of using fixed interior orientation parameters or self-calibration was investigated. The results show that, in the case of the used sensors and camera networks, self-calibration provides better results. To support such empirical finding, a numerical investigation using a Monte Carlo simulation was performed.

scholarly journals Step and Distance Measurement From a Low-Cost Consumer-Based Hip and Wrist Activity Monitor: Protocol for a Validity and Reliability Assessment (Preprint)

2020 ◽  
Author(s):  
Thomas Carlin ◽  
Nicolas Vuillerme
Keyword(s):  
Walking Speed ◽  
Low Cost ◽  
Activity Monitor ◽  
Distance Measurement ◽  
Step Count ◽  
Mobile Technologies ◽  
Experimental Session ◽  
Validity And Reliability ◽  
Activity Monitors ◽  
Study Results

BACKGROUND Self-tracking via wearable and mobile technologies is becoming an essential part of personal health management. At this point, however, little information is available to substantiate the validity and reliability of low-cost consumer-based hip and wrist activity monitors, with regard more specifically to the measurements of step counts and distance traveled while walking. OBJECTIVE The aim of our study is to assess the validity and reliability of step and distance measurement from a low-cost consumer-based hip and wrist activity monitor specific in various walking conditions that are commonly encountered in daily life. Specifically, this study is designed to evaluate whether and to what extent validity and reliability could depend on the sensor placement on the human body and the walking task being performed. METHODS Thirty healthy participants will be instructed to wear four PBN 2433 (Nakosite) activity monitors simultaneously, with one placed on each hip and each wrist. Participants will attend two experimental sessions separated by 1 week. During each experimental session, two separate studies will be performed. In study 1, participants will be instructed to complete a 2-minute walk test along a 30-meter indoor corridor under 3 walking speeds: very slow, slow, and usual speed. In study 2, participants will be required to complete the following 3 conditions performed at usual walking speed: walking on flat ground, upstairs, and downstairs. Activity monitor measured step count and distance values will be computed along with the actual step count (determined from video recordings) and distance (measured using a measuring tape) to determine validity and reliability for each activity monitor placement and each walking condition. RESULTS Participant recruitment and data collection began in January 2020. As of June 2020, we enrolled 8 participants. Dissemination of study results in peer-reviewed journals is expected in spring 2021. CONCLUSIONS To the best of our knowledge, this is the first study that examines the validity and reliability of step and distance measurement during walking using the PBN 2433 (Nakosite) activity monitor. Results of this study will provide beneficial information on the effects of activity monitor placement, walking speed, and walking tasks on the validity and reliability of step and distance measurement. We believe such information is of utmost importance to general consumers, clinicians, and researchers. INTERNATIONAL REGISTERED REPORT DERR1-10.2196/21262

A self-calibration method with high-accuracy and low-cost for large-area motion stage based on digital grating projection mode

2019 ◽  
Vol 12 (12) ◽  
pp. 126503
Author(s):  
Shengzhou Huang ◽  
Mujun Li ◽  
Lei Wang ◽  
Yongsheng Su ◽  
Yi Liang
Keyword(s):  
Low Cost ◽  
Calibration Method ◽  
High Accuracy ◽  
Large Area ◽  
Self Calibration ◽  
Motion Stage

Heterogeneous integration of a miniaturized W-band radar module

2015 ◽  
Vol 2015 (1) ◽  
pp. 000766-000770 ◽  
Author(s):  
K.-F. Becker ◽  
L. Georgi ◽  
R. Kahle ◽  
S. Voges ◽  
F. Brandenburger ◽  
...  
Keyword(s):  
Electromagnetic Waves ◽  
High Performance ◽  
Continuous Wave ◽  
Low Cost ◽  
Distance Measurement ◽  
Heterogeneous Integration ◽  
Frequency Range ◽  
Band Frequency ◽  
Technological Basis ◽  
W Band

For radar applications, the W-band frequency range (75 – 110 GHz) is a good candidate for high-resolution distance measurement and remote detection of small or hidden objects in distances of 10 cm to ≫ 20 m. As electromagnetic waves in this frequency range can easily penetrate rough atmosphere like fog, smoke or dust, W-band radars are perfectly suited for automotive, aviation, industrial and security applications. Additional benefit is that atmosphere has an absorption minimum at 94 GHz, so relative small output power is sufficient to achieve long range coverage. By combining and enhancing knowledge from the disciplines of heterogeneous integration technology and compound semiconductor-technology, the Fraunhofer Institutes IAF, IPA and IZM developed a miniaturized and low cost 94 GHz radar module. Result of this approach is a highly miniaturized radar module built using a modular approach. The radar components are mounted on a dedicated RF-NF-hybrid PCB while the signal processing is done on a separate board stacked below. This hybrid RF-module is combined with highly integrated digital processing PCB via micro connectors in a way that the radar system and an adapted conical HDPE-lens fit into an aluminum housing of 42×80×27 mm3 with a weight of only 160 grams for the whole module. The paper will describe the technological basis for such a frequency modulated continuous wave [FMCW] W-band radar module and describe in detail the technological features that enabled the assembly of such a miniaturized but high-performance system. The module yields an evaluated distance measurement accuracy of 5 ppm (5 μm deviation per meter target distance) while its low weight and small dimensions pave the way for a variety of new applications, including mobile operation.

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