scholarly journals Prediction of Drill Bit Breakage Using an Infrared Sensor

Sensors ◽  
2021 ◽  
Vol 21 (8) ◽  
pp. 2808
Author(s):  
Min-Jae Jeong ◽  
Sang-Woo Lee ◽  
Woong-Ki Jang ◽  
Hyung-Jin Kim ◽  
Young-Ho Seo ◽  
...  
Keyword(s):  
High Performance ◽  
Complex Analysis ◽  
Signal Transmission ◽  
Prediction Method ◽  
Cutting Fluid ◽  
Infrared Light ◽  
Measured Signal ◽  
Drill Bit ◽  
Infrared Sensor ◽  
Tool Breakage

In this paper, a novel drill bit breakage prediction method featuring a low-cost commercial infrared sensor to monitor drill bit corner wear is proposed. In the proposed method, the drill bit outer corner wear state can be monitored by measuring reflected infrared light because the reflection phenomenon is influenced by wear, edge shape, and surface roughness of the drill bit. In the experiments, a titanium workpiece was drilled without using cutting fluid to accelerate drill bit fracture. After drilling a hole in the workpiece, reflected infrared light was measured for the drill bit rotating at 100 rpm. Collected data on intensity of infrared light reflected from the circumferential surface of the drill bit versus the rotation angle of the drill bit were considered to predict tool breakage; two significant positions to predict tool breakage were found from the reflected infrared light graphs. By defining gradient vectors from the slopes of the reflected infrared light curves, a reliable criterion for determining drill bit breakage could be established. The proposed method offers possibilities for new measurement and analysis methods that have not been used in conventional tool wear and damage studies. The advantage of the proposed method is that the measurement device is easy to install and the measured signal is resistant to electromagnetic noise and ambient temperature because optical fiber is used as the signal transmission medium. It also eliminates the need for complex analysis of the measured signal, eliminating the need for a high-performance analyzer and reducing analysis time.

High-performance upconversion luminescent waveguide using a rare-earth doped microtube with beveled ends

2019 ◽  
Vol 7 (40) ◽  
pp. 12704-12708 ◽  
Author(s):  
Shaozuo Huang ◽  
Huan Chen ◽  
Tao He ◽  
Changjian Zhang ◽  
Chengyun Zhang ◽  
...  
Keyword(s):  
High Performance ◽  
Near Infrared ◽  
Light Emission ◽  
Signal Transmission ◽  
Upconversion Luminescence ◽  
Coupling Efficiency ◽  
Optical Signal ◽  
Infrared Light ◽  
Light Excitation ◽  
Rare Earth Doped

Upconversion luminescence-based waveguides can achieve optical signal transmission and visible light emission with near-infrared light excitation and their quality is highly dependent on the coupling efficiency between the light and waveguide.

scholarly journals Design and Development of Lubricating Material Database and Research on Performance Prediction Method of Machine Learning

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Dan Jia ◽  
Haitao Duan ◽  
Shengpeng Zhan ◽  
Yongliang Jin ◽  
Bingxue Cheng ◽  
...  
Keyword(s):  
Machine Learning ◽  
High Performance ◽  
Prediction Method ◽  
Lubricating Oil ◽  
Physical Parameters ◽  
First Principle ◽  
Vast Number ◽  
First Principle Calculation ◽  
Lubricating Material ◽  
Machine Learning Model

AbstractLong developing period and cumbersome evaluation for the lubricating materials performance seriously jeopardize the successful development and application of any database system in tribological field. Such major setback can be solved effectively by implementing approaches with high throughput calculation. However, it often involves with vast number of output files, which are computed on the basis of first principle computation, having different data format from that of their experimental counterparts. Commonly, the input, storage and management of first principle calculation files and their individually test counterparts, implementing fast query and display in the database, adding to the use of physical parameters, as predicted with the performance estimated by first principle approach, may solve such setbacks. Investigation is thus performed for establishing database website specifically for lubricating materials, which satisfies both data: (i) as calculated on the basis of first principles and (ii) as obtained by practical experiment. It further explores preliminarily the likely relationship between calculated physical parameters of lubricating oil and its respectively tribological and anti-oxidative performance as predicted by lubricant machine learning model. Success of the method facilitates in instructing the obtainment of optimal design, preparation and application for any new lubricating material so that accomplishment of high performance is possible.

scholarly journals APPLICATIONS OF THE LIGHT LASER WITH SPATIAL INCOHERENCE AND BIONIC OPTIMIZATION TO THE OPTICAL WIRELESS COMMUNICATIONS

2014 ◽  
Vol 25 (1) ◽  
pp. 169-185
Author(s):  
Samuel Ángel Jaramillo Flórez ◽  
Yuli Fernanda Achipiz
Keyword(s):  
Optical Networks ◽  
Optical Fibers ◽  
Optical Communications ◽  
High Performance ◽  
Computational Simulation ◽  
Original Method ◽  
Infrared Light ◽  
Optical Receivers ◽  
Spherical Lens ◽  
Optical Wireless Communications

The bioelectronics takes of the biology the optimized elements for to do a copy and to build technological mechanisms with functions based in that of body lives components. Telecommunications and biology present an analogy between the optical receivers and insects eyes, which forms are adequate to receipt signal since a transmitter, and these are been leaded to perfection by the nature during millions of years in the environment adaptation. The sizes and the forms depend of the direction of the waves and of the radiation pattern of these biotransmitters and bioreceivers (omatidies of insects eyes), which is similar as the optical communications emitters and photodetectors. The growth of the telecommunication services makes necessary the optimization of the bandwidth of the transmission channels. Although the optic transmission is considered like the ideal as for the attenuation and distortion characteristics that make that it possesses the better relation bandwidth - longitude, the demand of more transmission capacity forces to take advantage of them efficiently. High costs generated when deploying Optic Fiber Networks at the transport level, together with other factors that avoid PONs arriving to the home and/or office, have impulsed the design and implementation of partially optical networks (FITL), including an alternative that uses infrared light. This work explores the basis of these news access networks, and it is presented an optical communication transmission/reception system with optic channel of free space where has been modulated the transmitter laser through a set of spherical lens and optical fibers that expand the beam of light to different points of an indoor enclosure producing multiple punctual images located in positions that permit to determine and to optimize the bandwidth of the system. The computational simulation results are showed and are compared with those experimentally measured, indicating that this is an original method for to design emitters and receivers of high performance for optical communications.

A female perspective: testing the effects of noise masking on signal transmission patterns inside the nest box

Behaviour ◽  
2019 ◽  
Vol 157 (1) ◽  
pp. 59-76 ◽  
Author(s):  
Erin E. Grabarczyk ◽  
Sharon A. Gill
Keyword(s):  
Cross Correlation ◽  
Signal Transmission ◽  
Measured Signal ◽  
Signal To Noise ◽  
House Wren ◽  
Noise Masking ◽  
Nest Boxes ◽  
Cavity Nesting ◽  
Song Transmission ◽  
Correlation Factors

Abstract During the breeding season, avian pairs coordinate interactions with songs and calls. For cavity nesting birds, females inside nest boxes may rely on male vocalizations for information. Anthropogenic noise masks male songs, which could affect information gained by females. We explored song transmission from a female house wren (Troglodytes aedon) perspective, testing the hypothesis that noise masking alters songs that reach females inside nest boxes. We broadcast songs at three distances up to 25 m from nest boxes and re-recorded songs using two microphones, positioned inside and outside nest boxes. We measured signal-to-noise ratios and cross-correlation factors to estimate the effects of masking on transmission. In noise, songs received inside nest boxes had lower signal-to-noise ratios and cross-correlation factors than songs recorded outside of boxes, and these effects decreased with distance. For females, noise may reduce information conveyed through male songs and in response pairs may need to adjust their interactions.

Design of Shielding System for Impulse Ground Penetrating Radar Applications

2015 ◽  
Vol 656-657 ◽  
pp. 646-651 ◽  
Author(s):  
Tan Phuoc Dong ◽  
Huu Phu Bui
Keyword(s):  
Ground Penetrating Radar ◽  
High Performance ◽  
Signal Transmission ◽  
Design Procedure ◽  
External Noise ◽  
Deep Penetration ◽  
Antenna Coupling ◽  
Radar Applications ◽  
Ground Penetrating ◽  
Shielding System

In this paper, we propose a shielding system for impulse ground penetrating radar applications (GPR). The structure of shielding system is designed for our real impulse GPR application at 200 MHz central frequency for improving the deep penetration. The shielding system makes high quality of signal transmission from transmitter antenna to receiver antenna for impulse GPR system. It not only makes lowest T/R antenna coupling, high performance of antennas, preventing external noise but also reduces unnecessary air radiation which damages to the health of GPR user. A commercial absorbing material with a short thickness of 40mm is used to reduce the reflection of upper side of antenna in the cavity of shielding system. The design procedure is derived and its performance is explained. Shielding system is designed, simulated and optimized successfully in CST 2013 software. And it is fabricated with a good measurement results.

A Research of High Precision Rotational Speed Measurement System Based on Infrared Sensor and Microcontroller

2013 ◽  
Vol 278-280 ◽  
pp. 680-683
Author(s):  
Zi Qin Ma ◽  
Ren Zhang ◽  
Da Li Kang ◽  
Wu Yang
Keyword(s):  
High Precision ◽  
Measurement System ◽  
Rotational Speed ◽  
Pulse Signal ◽  
Measuring Method ◽  
Infrared Light ◽  
Infrared Sensor ◽  
Flip Flop ◽  
Speed Measurement ◽  
Photoelectric Sensor

With the deep analysis on the rotational speed measurement and the error existed in the measurement process at present, this paper introduces a high precision rotational speed measurement system based on infrared sensor and microcontroller. This system combines with improved measuring method. The sensor is an infrared photoelectric sensor, and uses its characteristics of the autocollimator ensured accuracy of measurement. The photoelectric sensor outputs weak voltage pulse signal when it receives the reflected infrared light. And then the signal is processed by double-reversed amplification and twice pulse shaping circuit. The system uses the relevant logic functions of a D-type flip-flop to control two 16-bit microcontroller chip timing/counter turned on and off simultaneously, and calculates the rotation speed. At last, the result is displayed on LED by Microcontroller. This measurement system has high accuracy, fast sampling speed and wide measuring range.

scholarly journals Localized Amyloidosis of the Upper Aerodigestive Tract: Complex Analysis of the Cellular Infiltrate and the Amyloid Mass

2019 ◽  
Vol 2019 ◽  
pp. 1-9
Author(s):  
Lilla Turiak ◽  
Bálint Kaszás ◽  
Krisztián Katona ◽  
Ágnes Lacza ◽  
László Márk ◽  
...  
Keyword(s):  
Light Chain ◽  
High Performance ◽  
Complex Analysis ◽  
Aerodigestive Tract ◽  
Upper Aerodigestive Tract ◽  
Cellular Infiltrate ◽  
Cell Ratio ◽  
Amyloid A ◽  
Apolipoprotein A ◽  
Localized Amyloidosis

Objectives. The aim of this study was to analyse the composition of amyloid mass and the plasmacytic infiltrate of localized amyloidosis of the upper aerodigestive tract. Methods. Biopsy materials were studied by light microscopy, immunohistochemistry (IHC), and mRNA in situ hybridization (mRNA-ISH). The amyloid mass was also analysed with high-performance liquid chromatography mass spectrometry- (HPLC-MS-) based proteomics. Results. Nodular and diffuse forms of amyloid deposition were detected. IHC analysis revealed λ-light chain (LC) in two cases, κ-LC in one case. The remaining two were positive with both. Proteins, well known from other amyloidoses like amyloid A (AA), prealbumin/transthyretin (PA), apolipoprotein A-I (ApoAI), and amyloid P component (APC), and also keratin were found with variable intensities in the cases. HPLC-MS revealed dozens of proteins with both LCs in all the lesions but sometimes with surprisingly small intensities. mRNA-ISH analysis revealed identical λ and κ dominance and only one normal κ/λ cell ratio. Conclusion. Cellular infiltrate and protein components in the amyloid showed congruent results in all but one case. The only exception with normal cell ratio and λ-dominant amyloid could be originated from the different protein-secreting activity of plasma cell clones. HPLC-MS analysis explored both LCs in all the amyloid in variable amount, but other proteins with much higher intensities like keratins, apolipoprotein A-IV (ApoAIV), were also detected. Proteins like AA, PA, ApoAI, and APC, previously known about amyloid-forming capability, also appeared. This indicates that localized amyloid in the upper aerodigestive tract is not a homogenous immunoglobulin mass but a mixture of proteins. The sometimes very low light chain intensities might also suggest that not all the localized amyloidosis cases of the upper aerodigestive tract are of convincingly AL type, and the analysis of the cellular infiltrate might indicate that not all are monoclonal.

scholarly journals Analysis of the Voltage-Dependent Plasticity in Organic Neuromorphic Devices

Electronics ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 4
Author(s):  
Seunghyuk Lee ◽  
Chang-Hyun Kim
Keyword(s):  
High Performance ◽  
Signal Transmission ◽  
Physical Parameters ◽  
The Novel ◽  
Transparent Plastic ◽  
Iterative Model ◽  
Charge Carrier Dynamics ◽  
Voltage Dependent ◽  
Dependent Signal ◽  
Active Channel

The bias-dependent signal transmission of flexible synaptic transistors is investigated. The novel neuromorphic devices are fabricated on a thin and transparent plastic sheet, incorporating a high-performance organic semiconductor, dinaphtho[2,3-b:2′,3′-f]thieno[3,2-b]thiophene, into the active channel. Upon spike emulation at different synaptic voltages, the short-term plasticity feature of the devices is substantially modulated. By adopting an iterative model for the synaptic output currents, key physical parameters associated with the charge carrier dynamics are estimated. The correlative extraction approach is found to yield the close fits to the experimental results, and the systematic evolution of the timing constants is rationalized.

A Multistage High Performance Amplification Approach for Improving WDM Communication System

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
Hardeep Singh Saini ◽  
Dinesh Arora ◽  
Amit Wason ◽  
Deepak Sharma
Keyword(s):  
Quality Factor ◽  
Communication Systems ◽  
High Performance ◽  
Optical Amplifiers ◽  
Traditional Approach ◽  
Signal Transmission ◽  
Fiber Amplifier ◽  
Optical Amplifier ◽  
Erbium Doped Fiber Amplifier ◽  
Eye Diagram

AbstractOptical amplifiers are developed to boost up the performance of the communication systems. Amplifiers such as erbium doped fiber amplifier (EDFA), RAMAN and semiconductor optical amplifier (SOA) are used for this purpose. It is mandatory to use optical amplifiers for signal transmission to long distances. In this paper, the hybrid optical amplifier EDFA-RAMAN-EDFA is proposed to enhance the signal quality received at receiver end and to initiate the efficient transmission of 8 × 10 Gbps transmission speed for wavelength division multiplexed (WDM) system. The proposed mechanism is evaluated with respect to various parameters such as quality factor, eye-height, and bit error rate (BER) and eye diagram considering various values of transmission distance ranging from 100 to 200 km. The analysis shows that the proposed mechanism has better quality factor value and minimum BER value than the traditional approach. Wider eye opening for proposed technique represents that the distortions produced in the system are least.

scholarly journals Influences of weather phenomena on automotive laser radar systems

2011 ◽  
Vol 9 ◽  
pp. 49-60 ◽  
Author(s):  
R. H. Rasshofer ◽  
M. Spies ◽  
H. Spies
Keyword(s):  
High Performance ◽  
Signal Transmission ◽  
Optical Signal ◽  
Laser Radar ◽  
Radar Signal ◽  
Radar Systems ◽  
Perception System ◽  
Theoretical Investigations ◽  
Physical Principles ◽  
Transmission Models

Abstract. Laser radar (lidar) sensors provide outstanding angular resolution along with highly accurate range measurements and thus they were proposed as a part of a high performance perception system for advanced driver assistant functions. Based on optical signal transmission and reception, laser radar systems are influenced by weather phenomena. This work provides an overview on the different physical principles responsible for laser radar signal disturbance and theoretical investigations for estimation of their influence. Finally, the transmission models are applied for signal generation in a newly developed laser radar target simulator providing – to our knowledge – worldwide first HIL test capability for automotive laser radar systems.

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