scholarly journals Development and Performance Evaluation of Planar Travel Distance Sensors for Mobile Robots in Sandy Terrain

2017 ◽  
Vol 29 (5) ◽  
pp. 887-894
Author(s):  
Arata Yanagisawa ◽  
◽  
Genya Ishigami
Keyword(s):  
Dynamic Range ◽  
Sampling Rate ◽  
Surface Characteristics ◽  
Travel Distance ◽  
Sensor System ◽  
Two Dimensional ◽  
High Sampling Rate ◽  
And Performance ◽  
Experimental Findings ◽  
Accuracy And Repeatability

A planar travel distance sensor (two-dimensional sensor) was developed for a mobile robot in sandy terrain. The sensor system uses an optical flow device integrated into a small module with a simple configuration. The system achieves a high sampling rate on the order of milliseconds as well as precise measurement on a sub-millimeter order. Its performance was evaluated experimentally for measurement accuracy and repeatability, velocity response, robustness at varied heights with respect to terrain, and terrain surface characteristics. The experimental results confirm that the two-dimensional sensor system is accurate, having an error of distance traveled of less than a few percent, and that it possesses a wide dynamic range for the robot’s traveling velocity. This paper also discusses the applicability of the two-dimensional sensor for practical scenarios on the basis of the experimental findings.

An Effective CS-BP Algorithm for 2-D DOA Estimation

2011 ◽  
Vol 128-129 ◽  
pp. 62-65
Author(s):  
Yu Yan An ◽  
Sen Sen Bai
Keyword(s):  
Frequency Modulation ◽  
Sampling Rate ◽  
Doa Estimation ◽  
Bp Algorithm ◽  
Basis Pursuit ◽  
Two Dimensional ◽  
Digital Converter ◽  
Analog To Digital ◽  
High Sampling Rate ◽  
Simulation Results

The bandwidth of the direction of arrival (DOA) estimation requires high sampling rate which extends the current analog to digital converter capacity. The paper presents an effective basis pursuit (BP) algorithm based on compressive sensing (CS) signals, which is called CS-BP algorithm, for two-dimensional (2-D) DOA estimation of Linear Frequency Modulation (LFM ). The simulation results verified that the method can effectively reduce the sampling data, and improve DOA estimation performance and efficiency.

scholarly journals A Wearable System for the Estimation of Performance-Related Metrics during Running and Jumping Tasks

2021 ◽  
Vol 11 (11) ◽  
pp. 5258
Author(s):  
Salvatore Tedesco ◽  
Davide Alfieri ◽  
Eduardo Perez-Valero ◽  
Dimitrios-Sokratis Komaris ◽  
Luke Jordan ◽  
...  
Keyword(s):  
Real World ◽  
Athletic Performance ◽  
Reaction Force ◽  
Sampling Rate ◽  
Information And Communications Technology ◽  
Evaluation Tool ◽  
Vertical Ground Reaction Force ◽  
Performance Technique ◽  
High Sampling Rate ◽  
And Performance

Athletic performance, technique assessment, and injury prevention are all important aspects in sports for both professional and amateur athletes. Wearable technology is attracting the research community’s interest because of its capability to provide real-time biofeedback to coaches and athletes when on the field and outside of more restrictive laboratory conditions. In this paper, a novel wearable motion sensor-based system has been designed and developed for athletic performance assessment during running and jumping tasks. The system consists of a number of components involving embedded systems (hardware and software), back-end analytics, information and communications technology (ICT) platforms, and a graphical user interface for data visualization by the coach. The system is able to provide automatic activity recognition, estimation of running and jumping metrics, as well as vertical ground reaction force (GRF) predictions, with sufficient accuracy to provide valuable information as regards training outcomes. The developed system is low-power, sufficiently small for real-world scenarios, easy to use, and achieves the specified communication range. The system’s high sampling rate, levels of accuracy and performance enables it as a performance evaluation tool able to support coaches and athletes in their real-world practice.

A High Speed Open-Loop Track/Hold Circuit in CMOS Process

2013 ◽  
Vol 756-759 ◽  
pp. 4302-4305
Author(s):  
Zheng Ping Zhang ◽  
Yong Lu Wang ◽  
Ming Liu
Keyword(s):  
High Speed ◽  
Dynamic Range ◽  
Sampling Rate ◽  
Open Loop ◽  
Cmos Process ◽  
High Sampling ◽  
High Sampling Rate ◽  
Interleaved Structure ◽  
Offset Compensation ◽  
Loop Track

A high speed open-loop track/hold circuit in 0.18um CMOS process is presented. Open-loop and differential architecture are adopted to obtain high bandwidth and high speed;time-interleaved structure is used to reach a high sampling rate;source negative feedback and offset compensation are used to improve the linearity of the circuit.Simulation results show that with 396.875MHz input, 1.6GSPS sampling rate, driving the pre-amplifier of ADC, the thack/hold circuits SFDR(spurious-free dynamic range) is 75.8dB,satisfying the demand of 12 bits ADC.The circuit features high sampling rate,wide bandwidth,high SFDR and universal.

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