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This paper proposes a low-cost vibration analyser for a vibration-based shaker. The system comprises a refurbished analogue shaker, laser displacement sensors and data acquisition (DAQ) device. The laser displacement sensor captures the vibrational motion generated by the shaker. The data obtained from the laser displacement sensor is then amplified and transferred to a computer using a DAQ device...
Open Platform Communication (OPC) also known as Object Linking and Embedding (OLE) for Process Control (OPC) is the platform for communication in automation and manufacturing fields among the group of networked devices. OPC standard supports the group of specifications known as OPC-Data Access (OPC-DA), OPC-Historical Data Access (OPC-HDA) and OPC-Unified Architecture (OPC-UA). In this paper, the...
The round trip time of the light pulse limits the maximum detectable frequency response range of vibration in phase-sensitive optical time domain reflectometry (φ-OTDR). We propose a method to break the frequency response range restriction of φ-OTDR system by modulating the light pulse interval randomly which enables a random sampling for every vibration point in a long sensing fiber. This sub-Nyquist...
Recently the world has seen an explosion of available data, gathered from sensors, experiments and direct measurements. The engineering world is shifting from model-centred simulations to the exploitation of large datasets for insights into machine behaviour. In the case of optimisation, where usually a simulation model is provided for the exploration of the parameter space, the new data-driven approach...
Tool Condition Monitoring is very fundamental part of the Manufacturing industry similar to the automation and hence has a great importance in research based on manufacturing engineering. Many of the people those concern with the manufacturing industries are interestedly study the TCM as successful unmanned automation in production is only possible if there is presence of good tool wear monitor and...
The measurement of railway clearance is the important guarantee way to the safety and the high-speed operation. A new scheme of non-contact clearance measurement method is proposed based on laser sensor in this paper. A high speed data acquisition card is designed based on FPGA, completing the laser data acquisition and clock synchronization. And an algorithm of vibration compensation is designed...
An important aspect in improvement of the reliability for electric and electronic assemblies (PCBs, electrical panels, electrical motors) is represented by the accurate prediction of the response of these equipments in environments characterized by mechanical vibration. In this paper is presented a system capable to monitor, analyze and test the electrical equipments in vibrations conditions. The...
The paper deals with the problem of train arrival detection in tracks maintenance sites. Worker safety has, in fact, to be guaranteed and injuries due to undetected train transits are, unfortunately, very common. Several solutions have already been presented based either on human sentinels or automatic detection systems. They, however, suffer from high operating costs and long assembly time, respectively...
This paper describes a seismic wave sensor, its readout electronics and data acquisition system. The seismic sensor is based on piezoelectric materials, which show the ability of transforming mechanical into electrical signals. In particular, the present sensor is based on a piezoelectric polymer, poly(vinilidene fluoride) as its main characteristics made it suitable for detecting the amplitude and...
Coriolis mass flowmeter(CMF) is significant in many industrial and commercial areas. The Coriolis mass flow sensor is one of the CMF components, which is essential to the performance and precise. The objectives of the work to be presented here were to investigate the vibration characteristics of Coriolis mass flow sensor by experiment, using commercial meters (U-shape tubes). By applying an external...
Electro-mechanical actuators (EMA) are finding increasing use in aerospace applications, especially with the trend towards all all-electric aircraft and spacecraft designs. However, electro-mechanical actuators still lack the knowledge base accumulated for other fielded actuator types, particularly with regard to fault detection and characterization. This paper presents a thorough analysis of some...
This paper is concerned with the design and development of an on-line condition monitoring system for large power transformers utilizing signals such as transformer vibration, voltages, currents, temperature and state of switches. The system consists of two parts which communicate each other via Ethernet or series port. The formal is a front-end computer subsystem used for data acquisition and processing,...
In walking guide system for a blind pedestrian, it is needed to detect an obstacle distribution in walking space not only 2D but space including pendent and/or protruded obstacles, and feedback to the blind for safe walking. The obstacle information is transferred to a blind pedestrian by a tactile stimulation. Based on the obstacle information a user plans walking route. In this paper, to apply a...
The Condition Monitoring of On-Load Tap Changers is very important because they have proved to be the elements with noticeable failures in a power transformer. This article describes the development of a portable virtual instrument for monitoring this kind of elements. The monitoring task is based in the measurement and analysis of the vibrations that a tap change produces. In contrast with other...
Unbalancing in rotating machinery e.g. electric fans causes vibration which normally appears as noise. It reduces the life of shaft bearings. A dynamic balancing machine is used to reduce such a vibration to an acceptable level. Traditional dynamic balancing machine is very often in bad results as its low measure accuracy, long measurement time, and short range of measurement and low possibility of...
The Center of Remote Sensing of Ice Sheets (CReSIS) is studying the use of the TETwalker mobile robot developed by NASA/Goddard Space Flight Center for polar seismic data acquisition. This paper discusses the design process for deploying seismic sensors within the 4-TETwalker mobile robot architecture. The 4-TETwalkerpsilas center payload node was chosen as the deployment medium. An alternative method...
The condition monitoring of on-load tap changers is very important because they have proved to be the elements with noticeable failures in a power transformer. This article describes the development of a portable virtual instrument for monitoring this kind of elements. The monitoring task is based in the measurement and analysis of the vibrations that a tap change produces. In contrast with other...
In this paper we investigate the use and function of vibration and acceleration sensors. We designed and constructed a data acquisition board using the ADXL202 acceleration sensor, with the possibility of connecting it to a computer, with a real time data transmission. The ADXL202 sensor is a dual axis accelerometer on a single IC chip, with the capability of measuring dynamic and static accelerations...
Often condition monitoring (CM) system developers use simulation or test rig data due to a lack of actual wind turbine measurements however, this data may not necessarily reflect processes happening in the real turbine application. In order to determine different patterns of machinery deterioration, precise data of existing parameters at higher sampling frequencies up to 20 kHz is needed. Additional...
A multipoint fiber-optic temperature sensor network integrated inside a power transformer for continuous monitoring of hot-spots on windings, cellulose insulations, and oil, is demonstrated and tested. The temperature sensors are based on proprietary encapsulated fiber Bragg grating (FBG) sensors and the optical interrogation unit uses a special designed narrowband high power broadband fiber source...
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