Vibration monitoring

Part 2 of ebook "Advances in smart technologies in structural engineering" provides readers with contents including: spatial filtering with discrete array sensors and distributed PVDF films; structural health monitoring using guided ultrasonic waves; controllability and asymptotic problems in distributed systems; mechatronics in vibration monitoring and control;...

123p mothoiphong 28-06-2024 2 1   Download

Output-only methods based on machine/deep-learning algorithms are highly practical approaches for timely detecting potential damages in civil structures as they directly employ measured vibration signals but do not require exact knowledge of input loading nor the service interruption for manual inspection.

14p viohoyo 25-04-2024 4 2   Download

The project develops an IoT system prototype that can reduce the risks of traffic accidents through a continuous monitoring of parameters during participation in traffic by vehicles. The system integrates sensors, including gas sensors (detection of alcohol concentration), vibration sensors (detection of accidents), and infrared sensors (detection of the seat belts). In case of any accident, the system can send warnings and location information to the relevant systems.

10p vilarry 01-04-2024 7 1   Download

This paper introduces an innovative design for a laserbased apparatus employing diffractive beam sampling technology, with the primary purpose of characterizing vibration frequencies induced within large-scale bridges.

3p vishekhar 01-11-2023 4 2   Download

The real-time monitoring of the position and speed of a moving object is crucial for safety compliance in industrial applications. The effectiveness of current sensing technology is limited by sensing distance and messy environments.

7p viberbers 09-08-2023 3 3   Download

A biosensor is developed to monitor cardiac function to be used in e-health and clinical medicine (screening and diagnosis). The sensor uses a tri-axial accelerometer to record the ultra low-frequency vibrations of the heart.

7p vidoctorstrange 06-05-2023 10 4   Download

The aim of the research was the processing of the vibration signatures from healthy and damaged composite beams acquired with the help of a Scanning Laser Vibrometer (SLV) upon excitation and analysis of the mode shapes acquired for damage detection. The displacement mode shapes acquired were then converted into curvature mode shapes with the help of a Central Difference Approximation method (CDA).

146p runthenight07 01-03-2023 5 2   Download

Energy harvesting technology generating electrical energy from structural responses has been in the spotlight recently because of the development of self-powered autonomous wireless sensor systems. This study proposed and tested a high-sensitivity, high-durability, low-cost vibration power-generating device using a magnetostrictive element (Fe-Ga alloy) on a real-scale prestressed concrete girder to investigate its practical performance.

4p viwilliamleiding 10-12-2021 11 1   Download

In this report, modal analysis of cracked beam with piezoelectric layer is carried out to investigate effect of crack and piezoelectric layer thickness on natural frequencies of the structure and output charge generated in the piezoelectric layer by vibration modes.

16p inception36 30-11-2021 16 1   Download

Currently, with the disappearance of fossil energy sources, finding new alternative energy sources is very necessary such as: solar energy, wind energy, tidal energy, flow energy, ... However, these energy sources require high investment capital, large capacity, and bulky size. In circuits requiring small power sources (below 12V), it is not applicable, or only used through intermediate devices such as transformers, current transformers; Therefore, the application of energy from mechanical vibration has been proposed as an optimal measure compared to the above methods..

6p trinhthamhodang9 04-12-2020 12 1   Download

A distinct pattern of phase differences was observed for each of the vibration models. The developed fuzzy logic module demonstrated successful recognition of the vibration frequencies, modes, orders, directions, and phase differences within 0.4 ms for the beam and shell mode vibrations

11p minhxaminhyeu5 30-06-2019 11 0   Download

This paper presents a wavelet spectrum technique for monitoring a sudden crack of a beam-like bridge structure during earthquake excitation. When there is a sudden crack caused by earthquake excitation the stiffness of the structure is changed leading to a sudden change in natural frequencies during vibration.

16p thienthanquydu 19-10-2018 39 0   Download

Wireless Sensor Networks (WSNs) can be defined as a self-configured and infrastructure-less wireless networks to monitor physical or environmental conditions, such as temperature, sound, vibration, pressure, motion or pollutants and to cooperatively pass their data through the network to a main location or sink where the data can be observed and analysed. A sink or base station acts likean interface between users and the network. One can retrieve required information from the network by injecting queries and gathering results from the sink.

319p namde01 11-04-2013 128 21   Download

Existing sensor network architectures are based on the as- sumption that data will be polled. Therefore, they are not adequate for long-term battery-powered use in applications that must sense or react to events that occur at unpre- dictable times.

10p giamdocamnhac 06-04-2013 46 6   Download

An alarm system is composed of three primary elements: sensors, controls and annunciation. Sensors consist of switches, motion detectors, sound or vibration detectors and other devices that are designed to “sense” the presence of an intruder, either the point of entry or when he moves within the residence Sensors can also take the form of buttons, that the occupant uses to activate a duress alarm. Controls consist of a panel and a keypad into which a code number that arms or disarms the system is entered.

0p connhobinh 07-12-2012 49 2   Download

Before the days of mass literacy, medicine was more art than science, and people recognized a pharmacy by the four traditional colored bottles that represent earth, fire, air, and water. Medicine has come a long way since the days of the apothecary with its impressive collection of powders and bottles; drugs today are highly regulated and must comply with standards set by the U.S., Europe, Japan, and other countries. A drug must be shown to be efficacious and meet rigorous standards of purity, composition, and potency before being approved for use in the patient populatio...

400p gian_anh 18-10-2012 49 11   Download

This comprehensivereference/text provides a thorough grounding in the fundamentals of rotating machinery vibration-treating computer model building, sources and types of vibration, and machine vibration signal analysis. Illustrating turbomachinery, vibration severity levels, condition monitoring,...

169p ktcn_1 17-07-2012 79 17   Download

Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí sinh học quốc tế đề tài : In vivo evaluation of a vibration analysis technique for the per-operative monitoring of the fixation of hip prostheses

10p panasonic10 13-01-2012 40 2   Download

6 Process Monitoring and Control of Machining Operations 6.1 6.2 6.3 Robert G. Landers University of Missouri at Rolla Introduction Force/Torque/Power Generation Cutting Force Models • Force/Torque/Power Monitoring • Force/Torque/Power Control Forced Vibrations and Regenerative Chatter Regenerative Chatter Detection • Regenerative Chatter Suppression 6.4 6.5 6.6 Tool Condition Monitoring and Control Tool Failure • Tool Wear A. Galip Ulsoy University of Michigan Other Process Phenomena Burr Formation • Chip Formation • Cutting Temperature Generation Richard J.

19p medinova 28-10-2010 92 15   Download

5 Machine Tool Monitoring and Control 5.1 5.2 5.3 Kourosh Danai University of Massachusetts, Amherst Introduction Process Monitoring Tool Wear Estimation • Tool Breakage Detection • Chatter Detection Process Control Control for Process Regulation • Control for Process Optimization 5.4 Conclusion 5.1 Introduction Machine tool monitoring and control are essential for automated manufacturing. Monitoring is necessary for detection of a process anomaly to prevent machine damage by stopping the process, or to remove the anomaly by adjusting the process inputs (feeds and speeds).

10p medinova 28-10-2010 81 16   Download